annotate discussion.roff @ 182:764738b17b74

Updated the numbers of cmdline switches to recent mmh changes.
author markus schnalke <meillo@marmaro.de>
date Wed, 11 Jul 2012 09:58:18 +0200
parents eb6eeb10afd5
children 4c5055a0e981
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1 .H0 "Discussion
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2 .P
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3 This main chapter discusses the practical work accomplished in the
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4 mmh project.
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5 It is structured along the goals set for the project.
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6 The concrete work undertaken
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7 is described in the examples of how the general goals were achieved.
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8 The discussion compares the current version of mmh with the state of
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9 nmh just before the mmh project started, i.e. fall 2011.
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10 Current changes of nmh will be mentioned only as side notes.
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11 .\" XXX where do I discuss the parallel development of nmh?
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15 .\" --------------------------------------------------------------
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16 .H1 "Streamlining
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18 .P
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19 MH once provided anything necessary for email handling.
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20 The community around nmh has the similar understanding that nmh should
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21 provide a complete email system.
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22 In fundamental contrast, mmh shall be an MUA only.
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23 I believe that the development of all-in-one mail systems is obsolete.
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24 Today, email is too complex to be fully covered by a single project.
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25 Such a project will not be able to excel in all aspects.
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26 Instead, the aspects of email should be covered by multiple projects,
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27 which then can be combined to form a complete system.
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28 Excellent implementations for the various aspects of email already exist.
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29 Just to name three examples: Postfix is a specialized MTA,
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30 .\" XXX homepages verlinken
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31 Procmail is a specialized MDA, and Fetchmail is a specialized MRA.
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32 I believe that it is best to use such specialized tools instead of
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33 providing the same function again as a side-component in the project.
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34 .\" XXX mail agent picture here
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35 .P
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36 Doing something well requires focusing on a small set of specific aspects.
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37 Under the assumption that development focussed on a particular area
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38 produces better results there, specialized projects will be superior
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39 in their field of focus.
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40 Hence, all-in-one mail system projects \(en no matter if monolithic
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41 or modular \(en will never be the best choice in any of the fields.
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42 Even in providing the best consistent all-in-one system, they are likely
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43 to be beaten by projects that focus only on integrating existing mail
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44 components to create a homogeneous system.
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45 .P
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46 The limiting resource in the community development of free software
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47 is usually man power.
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48 .\" XXX FIXME ref!
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49 If the development power is spread over a large development area,
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50 it becomes even more difficult to compete with the specialists in the
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51 various fields.
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52 The concrete situation for MH-based mail systems is even tougher,
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53 given their small and aged community, concerning both developers and users.
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54 .P
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55 In consequence, I believe that the available development resources
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56 should focus on the point where MH is most unique.
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57 This is clearly the user interface \(en the MUA.
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58 Peripheral parts should be removed to streamline mmh for the MUA task.
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61 .H2 "Mail Transfer Facilities
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62 .Id mail-transfer-facilities
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63 .P
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64 In contrast to nmh, which also provides mail submission and mail retrieval
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65 agents, mmh is an MUA only.
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66 This general difference initiated the development of mmh.
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67 The removal of the mail transfer facilities was the first work task
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68 in the mmh project.
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69 .P
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70 Focusing on one mail agent role only, is motivated by Eric Allman's
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71 experience with Sendmail.
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72 He identified the limitation of Sendmail to the MTA task as one reason for
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73 its success:
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74 .[ [
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75 costales sendmail
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76 .], p. xviii]
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77 .QS
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78 Second, I limited myself to the routing function \(en
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79 I wouldn't write user agents or delivery back-ends.
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80 This was a departure of the dominant through of the time,
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81 in which routing logic, local delivery, and often the network code
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82 were incorporated directly into the user agents.
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83 .QE
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84 .P
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85 In nmh, the Mail Submission Agent (MSA) is called
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86 \fIMessage Transfer Service\fP (MTS).
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87 This facility, implemented by the
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88 .Pn post
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89 command, established network connections and spoke SMTP to submit
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90 messages to be relayed to the outside world.
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91 The changes in email demanded changes in this part of nmh as well.
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92 Encryption and authentication for network connections
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93 needed to be supported, hence TLS and SASL were introduced into nmh.
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94 This added complexity to nmh without improving it in its core functions.
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95 Also, keeping up with recent developments in the field of
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96 mail transfer requires development power and specialists.
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97 In mmh, this whole facility was simply cut off.
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101 Instead, mmh depends on an external MSA.
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102 The only outgoing interface available to mmh is the
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103 .Pn sendmail
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104 command, which almost any MSA provides.
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105 If not, a wrapper program can be written.
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106 It must read the message from the standard input, extract the
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107 recipient addresses from the message header, and hand the message
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108 over to the MSA.
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109 For example, a wrapper script for qmail would be:
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110 .VS
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111 #!/bin/sh
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112 exec qmail-inject # ignore command line arguments
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113 VE
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114 The requirement to parse the recipient addresses out of the message header
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115 is likely to be removed in the future.
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116 Then mmh would pass the recipient addresses as command line arguments.
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117 This appears to be the better interface.
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118 .\" XXX implement it
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119 .P
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120 To retrieve mail, the
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121 .Pn inc
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122 command acted as an Mail Retrieval Agent (MRA).
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123 It established network connections
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124 and spoke POP3 to retrieve mail from remote servers.
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125 As with mail submission, the network connections required encryption and
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126 authentication, thus TLS and SASL were added.
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127 Support for message retrieval through IMAP will soon become necessary
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128 additions, too, and likewise for any other changes in mail transfer.
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129 Not so for mmh because it has dropped the support for retrieving mail
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130 from remote locations.
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131 .Ci ab7b48411962d26439f92f35ed084d3d6275459c
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132 Instead, it depends on an external tool to cover this task.
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133 Mmh has two paths for messages to enter mmh's mail storage:
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134 (1) Mail can be incorporated with
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135 .Pn inc
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136 from the system maildrop, or (2) with
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137 .Pn rcvstore
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138 by reading them, one at a time, from the standard input.
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139 .P
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140 With the removal of the MSA and MRA, mmh converted from an all-in-one
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141 mail system to being an MUA only.
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142 Now, of course, mmh depends on third-party software.
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143 An external MSA is required to transfer mail to the outside world;
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144 an external MRA is required to retrieve mail from remote machines.
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145 Excellent implementations of such software exist,
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146 which likely are superior than the internal version.
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147 Additionally, the best suiting programs can be freely chosen.
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148 .P
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149 As it had already been possible to use an external MSA or MRA,
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150 why not keep the internal version for convenience?
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151 .\" XXX ueberleitung
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152 The question whether there is sense in having a fall-back pager in all
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153 the command line tools, for the cases when
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154 .Pn more
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155 or
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156 .Pn less
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157 are not available, appears to be ridiculous.
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158 Of course, MSAs and MRAs are more complex than text pagers
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159 and not necessarily available but still the concept of orthogonal
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160 design holds: ``Write programs that do one thing and do it well.''
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161 .[
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162 mcilroy unix phil
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163 p. 53
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164 .]
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165 .[
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166 mcilroy bstj foreword
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167 .]
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168 Here, this part of the Unix philosophy was applied not only
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169 to the programs but to the project itself.
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170 In other words:
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171 Develop projects that focus on one thing and do it well.
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172 Projects which have grown complex should be split, for the same
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173 reasons that programs which have grown complex should be split.
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174 If it is conceptionally more elegant to have the MSA and MRA as
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175 separate projects then they should be separated.
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176 In my opinion, this is the case here.
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177 The RFCs propose this separation by clearly distinguishing the different
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178 mail handling tasks.
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179 .[
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180 rfc 821
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181 .]
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182 The small interfaces between the mail agents support the separation.
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183 .P
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184 Email once had been small and simple.
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185 At that time,
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186 .Pn /bin/mail
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187 had covered everything there was to email and still was small and simple.
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188 Later, the essential complexity of email increased.
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189 (Essential complexity is the complexity defined by the problem itself.\0
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190 .[[
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191 brooks no silver bullet
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192 .]])
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193 Email systems reacted to this change: they grew.
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194 RFCs started to introduce the concept of mail agents to separate the
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195 various tasks because they became more extensive and new tasks appeared.
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196 As the mail systems grew even more, parts were split off.
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197 For instance, a POP server was included in the original MH;
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198 it was removed in nmh.
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199 Now is the time to go one step further and split off the MSA and MRA, too.
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200 Not only does this decrease the code size of the project,
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201 more importantly, it unburdens mmh of the whole field of
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202 message transfer with all its implications for the project.
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203 There is no more need for concern with changes in network transfer.
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204 This independence is gained by depending on an external program
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205 that covers the field.
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206 Today, this is a reasonable exchange.
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207 .P
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208 .\" XXX ueberleitung ???
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209 Functionality can be added in three different ways:
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210 .LI 1
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211 Implementing the function in the project itself.
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212 .LI 2
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213 Depending on a library that provides the function.
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214 .LI 3
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215 Depending on a program that provides the function.
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216 .LP
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217 .\" XXX Rework sentence
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218 While implementing the function in the project itself leads to the
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219 largest increase in code size and requires the most maintenance
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220 and development work,
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221 it increases the project's independence of other software the most.
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222 Using libraries or external programs requires less maintenance work
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223 but introduces dependencies on external software.
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224 Programs have the smallest interfaces and provide the best separation,
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225 but possibly limit the information exchange.
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226 External libraries are more strongly connected than external programs,
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227 thus information can be exchanged in a more flexible manner.
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228 Adding code to a project increases maintenance work.
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229 .\" XXX ref
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230 Implementing complex functions in the project itself adds
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231 a lot of code.
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232 This should be avoided if possible.
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233 Hence, the dependencies only change in their character,
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234 not in their existence.
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235 In mmh, library dependencies on
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236 .Pn libsasl2
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237 and
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238 .Pn libcrypto /\c
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239 .Pn libssl
159
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240 were traded against program dependencies on an MSA and an MRA.
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241 This also meant trading build-time dependencies against run-time
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242 dependencies.
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243 Besides providing stronger separation and greater flexibility,
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244 program dependencies also allowed
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245 over 6\|000 lines of code to be removed from mmh.
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246 This made mmh's code base about 12\|% smaller.
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247 Reducing the project's code size by such an amount without actually
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248 losing functionality is a convincing argument.
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249 Actually, as external MSAs and MRAs are likely superior to the
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250 project's internal versions, the common user even gains functionality.
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251 .P
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252 Users of MH should not have problems setting up an external MSA and MRA.
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253 Also, the popular MSAs and MRAs have large communities and a lot
169
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254 of available documentation.
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255 Choices for MSAs range from full-featured MTAs such as
159
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256 .\" XXX refs
169
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257 .I Postfix ,
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258 over mid-size MTAs such as
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259 .I masqmail
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260 and
169
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261 .I dma ,
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262 to small forwarders such as
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263 .I ssmtp
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264 and
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265 .I nullmailer .
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266 Choices for MRAs include
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267 .I fetchmail ,
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268 .I getmail ,
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269 .I mpop
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270 and
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271 .I fdm .
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272
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273
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274 .H2 "Non-MUA Tools
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275 .P
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276 One goal of mmh is to remove the tools that are not part of the MUA's task.
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277 Furthermore, any tools that do not significantly improve the MUA's job
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278 should be removed.
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279 Loosely related and rarely used tools distract from the lean appearance.
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280 They require maintenance work without adding much to the core task.
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281 By removing these tools, the project shall become more streamlined
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282 and focused.
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283 In mmh, the following tools are not available anymore:
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284 .BU
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285 .Pn conflict
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286 was removed
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287 .Ci 8b235097cbd11d728c07b966cf131aa7133ce5a9
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288 because it is a mail system maintenance tool that is not MUA-related.
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289 It even checked
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290 .Fn /etc/passwd
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291 and
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292 .Fn /etc/group
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293 for consistency, which is completely unrelated to email.
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294 A tool like
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295 .Pn conflict
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296 is surely useful, but it should not be shipped with mmh.
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297 .\" XXX historic reasons?
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298 .BU
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299 .Pn rcvtty
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300 was removed
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301 .Ci 14767c94b3827be7c867196467ed7aea5f6f49b0
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302 because its use case of writing to the user's terminal
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303 on receival of mail is obsolete.
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304 If users like to be informed of new mail, the shell's
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305 .Ev MAILPATH
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306 variable or graphical notifications are technically more appealing.
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307 Writing directly to terminals is hardly ever desired today.
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308 If, though, one prefers this approach, the standard tool
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309 .Pn write
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310 can be used in a way similar to:
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311 .VS
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312 scan -file - | write `id -un`
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313 VE
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314 .BU
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315 .Pn viamail
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316 .\" XXX was macht viamail
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317 was removed
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318 .Ci eda72d6a7a7c20ff123043fb7f19c509ea01f932
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319 when the new attachment system was activated, because
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320 .Pn forw
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321 could then cover the task itself.
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322 The program
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323 .Pn sendfiles
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324 was rewritten as a shell script wrapper around
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325 .Pn forw .
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326 .Ci 0e82199cf3c991a173e0ac8aa776efdb3ded61e6
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327 .BU
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328 .Pn msgchk
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329 .\" XXX was macht msgchk
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330 was removed
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331 .Ci bb9360ead7eb7a3fedcce2eeedfc660014e41dbe ,
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332 because it lost its use case when POP support was removed.
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333 A call to
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334 .Pn msgchk
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335 provided hardly more information than:
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336 .VS
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337 ls -l /var/mail/meillo
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338 VE
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339 It did distinguish between old and new mail, but
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340 these details can be retrieved with
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341 .Pn stat (1),
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342 too.
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343 A small shell script could be written to print the information
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344 in a similar way, if truly necessary.
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345 As mmh's
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346 .Pn inc
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347 only incorporates mail from the user's local maildrop,
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348 and thus no data transfers over slow networks are involved,
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349 there is hardly any need to check for new mail before incorporating it.
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350 .BU
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351 .Pn msh
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352 was removed
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353 .Ci 916690191222433a6923a4be54b0d8f6ac01bd02
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354 because the tool was in conflict with the philosophy of MH.
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355 It provided an interactive shell to access the features of MH,
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356 but it was not just a shell tailored to the needs of mail handling.
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357 Instead, it was one large program that had several MH tools built in.
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358 This conflicts with the major feature of MH of being a tool chest.
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359 .Pn msh 's
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360 main use case had been accessing Bulletin Boards, which have ceased to
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361 be popular.
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362 .P
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363 Removing
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364 .Pn msh
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365 together with the truly archaic code relicts
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366 .Pn vmh
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367 and
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368 .Pn wmh
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369 saved more than 7\|000 lines of C code \(en
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370 about 15\|% of the project's original source code amount.
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371 Having less code \(en with equal readability, of course \(en
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372 for the same functionality is an advantage.
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373 Less code means less bugs and less maintenance work.
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374 As
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375 .Pn rcvtty
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376 and
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377 .Pn msgchk
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378 are assumed to be rarely used and can be implemented in different ways,
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379 why should one keep them?
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380 Removing them streamlines mmh.
63
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381 .Pn viamail 's
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382 use case is now partly obsolete and partly covered by
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383 .Pn forw ,
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384 hence there's no reason to still maintain it.
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385 .Pn conflict
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386 is not related to the mail client, and
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387 .Pn msh
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388 conflicts with the basic concept of MH.
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389 These two tools might still be useful, but they should not be part of mmh.
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390 .P
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391 Finally, there is
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392 .Pn slocal .
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393 .Pn slocal
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394 is an MDA and thus not directly MUA-related.
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395 It should be removed from mmh, because including it conflicts with
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396 the idea that mmh is an MUA only.
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397 .Pn slocal
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398 should rather become a separate project.
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399 However,
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400 .Pn slocal
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401 provides rule-based processing of messages, like filing them into
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402 different folders, which is otherwise not available in mmh.
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403 Although
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404 .Pn slocal
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parents: 168
diff changeset
405 neither pulls in dependencies, nor does it include a separate
154
63e885fb48ba Converted some internal references to the new macros.
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parents: 145
diff changeset
406 technical area (cf. Sec.
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
407 .Cf mail-transfer-facilities ),
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
408 it still accounts for about 1\|000 lines of code that need to be maintained.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
409 As
2e61e0004a8f Rework of existing text.
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parents: 74
diff changeset
410 .Pn slocal
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
411 is almost self-standing, it should be split off into a separate project.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
412 This would cut the strong connection between the MUA mmh and the MDA
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
413 .Pn slocal .
87
7d5b180de542 All kinds of rework plus new refs.
markus schnalke <meillo@marmaro.de>
parents: 85
diff changeset
414 For anyone not using MH,
7d5b180de542 All kinds of rework plus new refs.
markus schnalke <meillo@marmaro.de>
parents: 85
diff changeset
415 .Pn slocal
7d5b180de542 All kinds of rework plus new refs.
markus schnalke <meillo@marmaro.de>
parents: 85
diff changeset
416 would become yet another independent MDA, like
7d5b180de542 All kinds of rework plus new refs.
markus schnalke <meillo@marmaro.de>
parents: 85
diff changeset
417 .I procmail .
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
418 Then
87
7d5b180de542 All kinds of rework plus new refs.
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parents: 85
diff changeset
419 .Pn slocal
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
420 could be installed without the complete MH system.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
421 Likewise, mmh users could decide to use
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
422 .I procmail
87
7d5b180de542 All kinds of rework plus new refs.
markus schnalke <meillo@marmaro.de>
parents: 85
diff changeset
423 without having a second, unused MDA,
7d5b180de542 All kinds of rework plus new refs.
markus schnalke <meillo@marmaro.de>
parents: 85
diff changeset
424 .Pn slocal ,
76
2e61e0004a8f Rework of existing text.
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parents: 74
diff changeset
425 installed.
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
426 That appears to be conceptionally the best solution.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
427 Yet,
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
428 .Pn slocal
87
7d5b180de542 All kinds of rework plus new refs.
markus schnalke <meillo@marmaro.de>
parents: 85
diff changeset
429 is not split off.
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
430 I defer the decision over
78
64f177ca2af1 Text rework.
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parents: 76
diff changeset
431 .Pn slocal
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
432 out of a need for deeper investigation.
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
433 In the meanwhile, it remains part of mmh.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
434 However, its continued existence is not significant because
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
435 .Pn slocal
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
436 is unrelated to the rest of the project.
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
437
0
dc2bfef4cda7 Initial commit: Basic structure, macros and fonts.
markus schnalke <meillo@marmaro.de>
parents:
diff changeset
438
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
439
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
440 .H2 "Displaying Messages
155
75f20c925999 Fixed macro typo; and added typo fix found by Boris.
markus schnalke <meillo@marmaro.de>
parents: 154
diff changeset
441 .Id mhshow
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
442 .P
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
443 Since the very beginning, already in the first concept paper,
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
444 .\" XXX ref!!!
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
445 .Pn show
62
24aabbfe5794 Minor rework of larger text areas.
markus schnalke <meillo@marmaro.de>
parents: 60
diff changeset
446 had been MH's message display program.
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
447 .Pn show
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
448 mapped message numbers and sequences to files and invoked
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
449 .Pn mhl
89
83bfb4dbf59f Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 88
diff changeset
450 to have the files formatted.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
451 With MIME, this approach was not sufficient anymore.
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
452 MIME messages can consist of multiple parts. Some parts are not
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
453 directly displayable and text content might be encoded in
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
454 foreign charsets.
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
455 .Pn show 's
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
456 understanding of messages and
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
457 .Pn mhl 's
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
458 display capabilities could not cope with the task any longer.
62
24aabbfe5794 Minor rework of larger text areas.
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parents: 60
diff changeset
459 .P
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
460 Instead of extending these tools, additional tools were written from
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
461 scratch and added to the MH tool chest.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
462 Doing so is encouraged by the tool chest approach.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
463 Modular design is a great advantage for extending a system,
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
464 as new tools can be added without interfering with existing ones.
62
24aabbfe5794 Minor rework of larger text areas.
markus schnalke <meillo@marmaro.de>
parents: 60
diff changeset
465 First, the new MIME features were added in form of the single program
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
466 .Pn mhn .
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
467 The command
82
ff4537327162 Mayor rework: Replaced .DS with .VS, a better verbatim environment.
markus schnalke <meillo@marmaro.de>
parents: 78
diff changeset
468 .Cl "mhn -show 42
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
469 would show the MIME message numbered 42.
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
470 With the 1.0 release of nmh in February 1999, Richard Coleman finished
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
471 the split of
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
472 .Pn mhn
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
473 into a set of specialized tools, which together covered the
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
474 multiple aspects of MIME.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
475 One of them was
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
476 .Pn mhshow ,
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
477 which replaced
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
478 .Cl "mhn -show" .
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
479 It was capable of displaying MIME messages appropriately.
62
24aabbfe5794 Minor rework of larger text areas.
markus schnalke <meillo@marmaro.de>
parents: 60
diff changeset
480 .P
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
481 From then on, two message display tools were part of nmh,
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
482 .Pn show
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
483 and
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
484 .Pn mhshow .
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
485 To ease the life of users,
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
486 .Pn show
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
487 was extended to automatically hand the job over to
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
488 .Pn mhshow
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
489 if displaying the message would be beyond
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
490 .Pn show 's
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
491 abilities.
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
492 In consequence, the user would simply invoke
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
493 .Pn show
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
494 (possibly through
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
495 .Pn next
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
496 or
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
497 .Pn prev )
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
498 and get the message printed with either
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
499 .Pn show
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
500 or
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
501 .Pn mhshow ,
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
502 whatever was more appropriate.
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
503 .P
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
504 Having two similar tools for essentially the same task is redundant.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
505 Usually, users would not distinguish between
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
506 .Pn show
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
507 and
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
508 .Pn mhshow
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
509 in their daily mail reading.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
510 Having two separate display programs was therefore mainly unnecessary
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
511 from a user's point of view.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
512 Besides, the development of both programs needed to be in sync,
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
513 to ensure that the programs behaved in a similar way,
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
514 because they were used like a single tool.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
515 Different behavior would have surprised the user.
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
516 .P
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
517 Today, non-MIME messages are rather seen to be a special case of
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
518 MIME messages, although it is the other way round.
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
519 As
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
520 .Pn mhshow
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
521 had already been able to display non-MIME messages, it appeared natural
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
522 to drop
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
523 .Pn show
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
524 in favor of using
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
525 .Pn mhshow
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
526 exclusively.
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
527 .Ci 4c1efddfd499300c7e74263e57d8aa137e84c853
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
528 Removing
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
529 .Pn show
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
530 is no loss in function, because functionally
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
531 .Pn mhshow
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
532 covers it completely.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
533 The old behavior of
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
534 .Pn show
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
535 can still be emulated with the simple command line:
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
536 .VS
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
537 mhl `mhpath c`
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
538 VE
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
539 .P
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
540 For convenience,
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
541 .Pn mhshow
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
542 was renamed to
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
543 .Pn show
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
544 after
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
545 .Pn show
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
546 was gone.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
547 It is clear that such a rename may confuse future developers when
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
548 trying to understand the history.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
549 Nevertheless, I consider the convenience on the user's side,
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
550 to call
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
551 .Pn show
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
552 when they want a message to be displayed, to outweigh the inconvenience
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
553 on the developer's side when understanding the project history.
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
554 .P
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
555 To prepare for the transition,
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
556 .Pn mhshow
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
557 was reworked to behave more like
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
558 .Pn show
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
559 first.
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
560 (cf. Sec.
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
561 .Cf mhshow )
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
562 .\" XXX code commits?
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
563 Once the tools behaved more alike, the replacing appeared to be
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
564 even more natural.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
565 Today, mmh's new
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
566 .Pn show
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
567 has become the one single message display program once more,
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
568 with the difference
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
569 that today it handles MIME messages as well as non-MIME messages.
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
570 The outcome of the transition is one program less to maintain,
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
571 no second display program for users to deal with,
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
572 and less system complexity.
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
573 .P
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
574 Still, removing the old
69
f80ced4e749b Wrote more about the show-mhshow merge.
markus schnalke <meillo@marmaro.de>
parents: 66
diff changeset
575 .Pn show
88
30830e3b9e98 Further rework.
markus schnalke <meillo@marmaro.de>
parents: 87
diff changeset
576 hurts in one regard: It had been such a simple program.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
577 Its lean elegance is missing from the new
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
578 .Pn show ,
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
579 .\" XXX
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
580 however there is no alternative;
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
581 supporting MIME demands higher essential complexity.
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
582
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
583 .ig
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
584 XXX
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
585 Consider including text on scan listings here
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
586
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
587 Scan listings shall not contain body content. Hence, removed this feature.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
588 Scan listings shall operator on message headers and non-message information
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
589 only. Displaying the beginning of the body complicates everything too much.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
590 That's no surprise, because it's something completely different. If you
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
591 want to examine the body, then use show(1)/mhshow(1).
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
592 Changed the default scan formats accordingly.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
593 .Ci 70b2643e0da8485174480c644ad9785c84f5bff4
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
594 ..
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
595
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
596
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
597
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
598
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
599 .H2 "Configure Options
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
600 .P
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
601 Customization is a double-edged sword.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
602 It allows better suiting setups, but not for free.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
603 There is the cost of code complexity to be able to customize.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
604 There is the cost of less tested setups, because there are
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
605 more possible setups and especially corner cases.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
606 Additionally, there is the cost of choice itself.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
607 The code complexity directly affects the developers.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
608 Less tested code affects both users and developers.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
609 The problem of choice affects the users, for once by having to choose,
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
610 but also by more complex interfaces that require more documentation.
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
611 Whenever options add few advantages but increase the complexity of the
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
612 system, they should be considered for removal.
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
613 I have reduced the number of project-specific configure options from
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
614 fifteen to three.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
615
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
616 .U3 "Mail Transfer Facilities
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
617 .P
85
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
618 With the removal of the mail transfer facilities five configure
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
619 options vanished:
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
620 .P
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
621 The switches
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
622 .Sw --with-tls
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
623 and
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
624 .Sw --with-cyrus-sasl
89
83bfb4dbf59f Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 88
diff changeset
625 had activated the support for transfer encryption and authentication.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
626 .\" XXX cf
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
627 .\" XXX gruende kurz wiederholen
85
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
628 This is not needed anymore.
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
629 .Ci fecd5d34f65597a4dfa16aeabea7d74b191532c3
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
630 .Ci 156d35f6425bea4c1ed3c4c79783dc613379c65b
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
631 .P
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
632 .\" XXX cf
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
633 .\" XXX ``For the same reason ...''
85
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
634 The configure switch
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
635 .Sw --enable-pop
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
636 activated the message retrieval facility.
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
637 The code area that would be conditionally compiled in for TLS and SASL
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
638 support had been small.
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
639 The conditionally compiled code area for POP support had been much larger.
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
640 Whereas the code base changes would only slightly change on toggling
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
641 TLS or SASL support, it changed much on toggling POP support.
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
642 The changes in the code base could hardly be overviewed.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
643 By having POP support togglable, a second code base had been created,
85
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
644 one that needed to be tested.
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
645 This situation is basically similar for the conditional TLS and SASL
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
646 code, but there the changes are minor and can yet be overviewed.
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
647 Still, conditional compilation of a code base creates variations
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
648 of the original program.
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
649 More variations require more testing and maintenance work.
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
650 .P
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
651 Two other options only specified default configuration values:
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
652 .Sw --with-mts
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
653 defined the default transport service.
85
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
654 .Ci f6aa95b724fd8c791164abe7ee5468bf5c34f226
fb0d1b4c8fb1 Extended the text about mail transfer configure options.
markus schnalke <meillo@marmaro.de>
parents: 84
diff changeset
655 With
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
656 .Sw --with-smtpservers
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
657 default SMTP servers could be specified.
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
658 .Ci 128545e06224233b7e91fc4c83f8830252fe16c9
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
659 Both of them became irrelevant when the SMTP transport service was removed.
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
660 .\" XXX code ref
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
661 In mmh, all messages are handed over to
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
662 .Pn sendmail
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
663 for transportation.
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
664
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
665
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
666 .U3 "Backup Prefix
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
667 .P
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
668 The backup prefix is the string that was prepended to message
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
669 filenames to tag them as deleted.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
670 By default it had been the comma character (`\fL,\fP').
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
671 .\" XXX Zeitlich ordnen
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
672 In July 2000, Kimmo Suominen introduced
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
673 the configure option
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
674 .Sw --with-hash-backup
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
675 to change the default to the hash character `\f(CW#\fP'.
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
676 The choice was probably personal preference, because first, the
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
677 option was named
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
678 .Sw --with-backup-prefix.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
679 and had the prefix character as argument.
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
680 But giving the hash character as argument caused too many problems
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
681 for Autoconf,
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
682 thus the option was limited to use the hash character as the default prefix.
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
683 This supports the assumption, that the choice for the hash was
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
684 personal preference only.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
685 Being related or not, words that start with the hash character
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
686 introduce a comment in the Unix shell.
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
687 Thus, the command line
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
688 .Cl "rm #13 #15
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
689 calls
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
690 .Pn rm
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
691 without arguments because the first hash character starts the comment
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
692 that reaches until the end of the line.
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
693 To delete the backup files,
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
694 .Cl "rm ./#13 ./#15"
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
695 needs to be used.
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
696 Using the hash as backup prefix can be seen as a precaution against
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
697 data loss.
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
698 .P
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
699 First, I removed the configure option but added the profile entry
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
700 .Pe backup-prefix ,
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
701 which allows to specify an arbitrary string as backup prefix.
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
702 .Ci 6c40d481d661d532dd527eaf34cebb6d3f8ed086
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
703 Profile entries are the common method to change mmh's behavior.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
704 This change did not remove the choice but moved it to a location where
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
705 it suited better.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
706 .P
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
707 Eventually, however, the new trash folder concept
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
708 (cf. Sec.
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
709 .Cf trash-folder )
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
710 removed the need for the backup prefix completely.
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
711 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
712 .Ci ca0b3e830b86700d9e5e31b1784de2bdcaf58fc5
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
713
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
714
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
715 .U3 "Editor and Pager
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
716 .P
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
717 The two configure options
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
718 .CW --with-editor=EDITOR
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
719 .CW --with-pager=PAGER
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
720 were used to specify the default editor and pager at configure time.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
721 Doing so at configure time made sense in the eighties,
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
722 when the set of available editors and pagers varied much across
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
723 different systems.
89
83bfb4dbf59f Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 88
diff changeset
724 Today, the situation is more homogeneous.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
725 The programs
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
726 .Pn vi
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
727 and
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
728 .Pn more
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
729 can be expected to be available on every Unix system,
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
730 as they are specified by POSIX since two decades.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
731 (The specifications for
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
732 .Pn vi
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
733 and
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
734 .Pn more
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
735 appeared in
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
736 .[
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
737 posix 1987
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
738 .]
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
739 and,
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
740 .[
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
741 posix 1992
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
742 .]
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
743 respectively.)
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
744 As a first step, these two tools were hard-coded as defaults.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
745 .Ci 5d43a99db70c12a673028c7758c20cbe3e13ef5f
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
746 Not changed were the
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
747 .Pe editor
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
748 and
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
749 .Pe moreproc
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
750 profile entries, which allowed the user to override the system defaults.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
751 Later, the concept was reworked to respect the standard environment
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
752 variables
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
753 .Ev VISUAL
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
754 and
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
755 .Ev PAGER
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
756 if they are set.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
757 Today, mmh determines the editor to use in the following order,
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
758 taking the first available and non-empty item:
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
759 .LI 1
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
760 Environment variable
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
761 .Ev MMHEDITOR
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
762 .LI 2
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
763 Profile entry
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
764 .Pe Editor
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
765 .LI 3
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
766 Environment variable
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
767 .Ev VISUAL
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
768 .LI 4
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
769 Environment variable
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
770 .Ev EDITOR
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
771 .LI 5
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
772 Command
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
773 .Pn vi .
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
774 .LP
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
775 .Ci f85f4b7ae62e3d05a945dcd46ead51f0a2a89a9b
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
776 .P
89
83bfb4dbf59f Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 88
diff changeset
777 The pager to use is determined in a similar order,
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
778 also taking the first available and non-empty item:
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
779 .LI 1
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
780 Environment variable
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
781 .Ev MMHPAGER
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
782 .LI 2
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
783 Profile entry
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
784 .Pe Pager
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
785 (replaces
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
786 .Pe moreproc )
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
787 .LI 3
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
788 Environment variable
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
789 .Ev PAGER
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
790 .LI 4
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
791 Command
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
792 .Pn more .
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
793 .LP
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
794 .Ci 0c4214ea2aec6497d0d67b436bbee9bc1d225f1e
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
795 .P
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
796 By respecting the
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
797 .Ev VISUAL /\c
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
798 .Ev EDITOR
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
799 and
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
800 .Ev PAGER
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
801 environment variables,
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
802 the new behavior confirms better to the common style on Unix systems.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
803 Additionally, the new approach is more uniform and clearer to users.
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
804
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
805
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
806 .U3 "ndbm
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
807 .P
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
808 .Pn slocal
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
809 used to depend on
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
810 .I ndbm ,
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
811 a database library.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
812 The database is used to store the `\fLMessage-ID\fP's of all
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
813 messages delivered.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
814 This enables
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
815 .Pn slocal
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
816 to suppress delivering the same message to the same user twice.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
817 (This features was enabled by the
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
818 .Sw -suppressdup
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
819 switch.)
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
820 .P
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
821 A variety of versions of the database library exist.
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
822 .[
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
823 wolter unix incompat notes dbm
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
824 .]
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
825 Complicated autoconf code was needed to detect them correctly.
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
826 Furthermore, the configure switches
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
827 .Sw --with-ndbm=ARG
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
828 and
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
829 .Sw --with-ndbmheader=ARG
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
830 were added to help with difficult setups that would
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
831 not be detected automatically or correctly.
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
832 .P
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
833 By removing the suppress duplicates feature of
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
834 .Pn slocal ,
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
835 the dependency on
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
836 .I ndbm
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
837 vanished and 120 lines of complex autoconf code could be saved.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
838 .Ci ecd6d6a20cb7a1507e3a20d6c4cb3a1cf14c6bbf
89
83bfb4dbf59f Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 88
diff changeset
839 The change removed functionality too, but that is minor to the
78
64f177ca2af1 Text rework.
markus schnalke <meillo@marmaro.de>
parents: 76
diff changeset
840 improvement by dropping the dependency and the complex autoconf code.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
841 .\" XXX argument: slocal ist sowieso nicht teil vom mmh kern
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
842
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
843 .U3 "mh-e Support
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
844 .P
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
845 The configure option
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
846 .Sw --disable-mhe
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
847 was removed when the mh-e support was reworked.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
848 Mh-e is the Emacs front-end to MH.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
849 It requires MH to provide minor additional functions.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
850 The
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
851 .Sw --disable-mhe
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
852 configure option could switch these extensions off.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
853 After removing the support for old versions of mh-e,
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
854 only the
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
855 .Sw -build
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
856 switches of
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
857 .Pn forw
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
858 and
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
859 .Pn repl
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
860 are left to be mh-e extensions.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
861 They are now always built in because they add little code and complexity.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
862 In consequence, the
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
863 .Sw --disable-mhe
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
864 configure option was removed
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
865 .Ci a7ce7b4a580d77b6c2c4d980812beb589aa4c643
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
866 Removing the option removed a second code setup that would have
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
867 needed to be tested.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
868 .\" XXX datum?
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
869 This change was first accomplished in nmh and thereafter merged into mmh.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
870 .P
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
871 The interface changes in mmh require mh-e to be adjusted in order
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
872 to be able to use mmh as back-end.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
873 This will require minor changes to mh-e, but removing the
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
874 .Sw -build
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
875 switches would require more rework.
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
876
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
877 .U3 "Masquerading
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
878 .P
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
879 The configure option
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
880 .Sw --enable-masquerade
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
881 could take up to three arguments:
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
882 `draft_from', `mmailid', and `username_extension'.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
883 They activated different types of address masquerading.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
884 All of them were implemented in the SMTP-speaking
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
885 .Pn post
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
886 command, which provided an MSA.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
887 Address masquerading is an MTA's task and mmh does not cover
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
888 this field anymore.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
889 Hence, true masquerading needs to be implemented in the external MTA.
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
890 .P
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
891 The
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
892 .I mmailid
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
893 masquerading type is the oldest one of the three and the only one
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
894 available in the original MH.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
895 It provided a
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
896 .I username
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
897 to
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
898 .I fakeusername
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
899 mapping, based on the password file's GECOS field.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
900 The man page
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
901 .Mp mh-tailor (5)
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
902 described the use case as being the following:
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
903 .QS
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
904 This is useful if you want the messages you send to always
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
905 appear to come from the name of an MTA alias rather than your
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
906 actual account name. For instance, many organizations set up
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
907 `First.Last' sendmail aliases for all users. If this is
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
908 the case, the GECOS field for each user should look like:
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
909 ``First [Middle] Last <First.Last>''
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
910 .QE
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
911 .P
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
912 As mmh sends outgoing mail via the local MTA only,
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
913 the best location to do such global rewrites is there.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
914 Besides, the MTA is conceptionally the right location because it
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
915 does the reverse mapping for incoming mail (aliasing), too.
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
916 Furthermore, masquerading set up there is readily available for all
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
917 mail software on the system.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
918 Hence, mmailid masquerading was removed.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
919 .Ci 0836c8000ccb34b59410ef1c15b1b7feac70ce5f
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
920 .P
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
921 The
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
922 .I username_extension
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
923 masquerading type did not replace the username but would append a suffix,
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
924 specified by the
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
925 .Ev USERNAME_EXTENSION
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
926 environment variable, to it.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
927 This provided support for the
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
928 .I user-extension
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
929 feature of qmail and the similar
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
930 .I "plussed user
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
931 processing of sendmail.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
932 The decision to remove this username_extension masquerading was
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
933 motivated by the fact that
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
934 .Pn spost
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
935 had not supported it already.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
936 .Ci 2abae0bfd0ad5bf898461e50aa4b466d641f23d9
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
937 Username extensions are possible in mmh, but less convenient to use.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
938 .\" XXX covered by next paragraph
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
939 .\" XXX format file %(getenv USERNAME_EXTENSION)
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
940 .P
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
941 The
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
942 .I draft_from
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
943 masquerading type instructed
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
944 .Pn post
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
945 to use the value of the
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
946 .Hd From
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
947 header field as SMTP envelope sender.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
948 Sender addresses could be replaced completely.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
949 .Ci b14ea6073f77b4359aaf3fddd0e105989db9
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
950 Mmh offers a kind of masquerading similar in effect, but
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
951 with technical differences.
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
952 As mmh does not transfer messages itself, the local MTA has final control
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
953 over the sender's address. Any masquerading mmh introduces may be reverted
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
954 by the MTA.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
955 In times of pedantic spam checking, an MTA will take care to use
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
956 sensible envelope sender addresses to keep its own reputation up.
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
957 Nonetheless, the MUA can set the
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
958 .Hd From
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
959 header field and thereby propose
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
960 a sender address to the MTA.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
961 The MTA may then decide to take that one or generate the canonical sender
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
962 address for use as envelope sender address.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
963 .P
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
964 In mmh, the MTA will always extract the recipient and sender from the
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
965 message header (\c
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
966 .Pn sendmail 's
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
967 .Sw -t
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
968 switch).
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
969 The
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
970 .Hd From
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
971 header field of the draft may be set arbitrary by the user.
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
972 If it is missing, the canonical sender address will be generated by the MTA.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
973
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
974 .U3 "Remaining Options
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
975 .P
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
976 Two configure options remain in mmh.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
977 One is the locking method to use:
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
978 .Sw --with-locking=[dot|fcntl|flock|lockf] .
76
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
979 The idea of removing all methods except the portable dot locking
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
980 and having that one as the default is appealing, but this change
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
981 requires deeper technical investigation into the topic.
2e61e0004a8f Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 74
diff changeset
982 The other option,
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
983 .Sw --enable-debug ,
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
984 compiles the programs with debugging symbols and does not strip them.
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
985 This option is likely to stay.
72
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
986
bae9273b5802 Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents: 69
diff changeset
987
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
988
63
abbaca05ee8e More text.
markus schnalke <meillo@marmaro.de>
parents: 62
diff changeset
989
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
990 .H2 "Command Line Switches
93
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markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
991 .P
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
992 The command line switches of MH tools is similar to the X Window style.
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
993 .\" XXX ref
93
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parents: 89
diff changeset
994 They are words, introduced by a single dash.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
995 For example:
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
996 .Cl "-truncate" .
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
997 Every program in mmh has two generic switches:
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
998 .Sw -help ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
999 to print a short message on how to use the program, and
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1000 .Sw -Version
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1001 (with capital `V'), to tell what version of mmh the program belongs to.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1002 .P
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1003 Switches change the behavior of programs.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1004 Programs that do one thing in one way require no switches.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1005 In most cases, doing something in exactly one way is too limiting.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1006 If there is basically one task to accomplish, but it should be done
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1007 in various ways, switches are a good approach to alter the behavior
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1008 of a program.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1009 Changing the behavior of programs provides flexibility and customization
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1010 to users, but at the same time it complicates the code, documentation and
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1011 usage of the program.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1012 .\" XXX: Ref
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
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parents: 89
diff changeset
1013 Therefore, the number of switches should be kept small.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1014 A small set of well-chosen switches does no harm.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1015 But usually, the number of switches increases over time.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1016 Already in 1985, Rose and Romine have identified this as a major
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1017 problem of MH:
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1018 .[ [
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1019 rose romine real work
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1020 .], p. 12]
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
1021 .QS
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1022 A complaint often heard about systems which undergo substantial development
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1023 by many people over a number of years, is that more and more options are
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1024 introduced which add little to the functionality but greatly increase the
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1025 amount of information a user needs to know in order to get useful work done.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1026 This is usually referred to as creeping featurism.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1027 .QP
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1028 Unfortunately MH, having undergone six years of off-and-on development by
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1029 ten or so well-meaning programmers (the present authors included),
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1030 suffers mightily from this.
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
1031 .QE
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1032 .P
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1033 Being reluctant to adding new switches \(en or `options',
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1034 as Rose and Romine call them \(en is one part of a counter-action,
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1035 the other part is removing hardly used switches.
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1036 Nmh's tools had lots of switches already implemented,
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1037 hence, cleaning up by removing some of them was the more important part
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1038 of the counter-action.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1039 Removing existing functionality is always difficult because it
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1040 breaks programs that use these functions.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1041 Also, for every obsolete feature, there'll always be someone who still
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1042 uses it and thus opposes its removal.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1043 This puts the developer into the position,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1044 where sensible improvements to style are regarded as destructive acts.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1045 Yet, living with the featurism is far worse, in my eyes, because
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1046 future needs will demand adding further features,
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1047 worsening the situation more and more.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1048 Rose and Romine added in a footnote,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1049 ``[...]
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1050 .Pn send
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1051 will no doubt acquire an endless number of switches in the years to come.''
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1052 Although clearly humorous, the comment points to the nature of the problem.
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1053 Refusing to add any new switches would encounter the problem at its root,
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1054 but this is not practical.
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1055 New needs will require new switches and it would be unwise to block
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1056 them strictly.
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1057 Nevertheless, removing obsolete switches still is an effective approach
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1058 to deal with the problem.
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1059 Working on an experimental branch without an established user base,
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1060 eased my work because I did not offend users when I removed existing
110
4c0f13b1e0e8 Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 109
diff changeset
1061 functions.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1062 .P
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1063 Rose and Romine counted 24 visible and 9 more hidden switches for
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1064 .Pn send .
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1065 In nmh, they increased up to 32 visible and 12 hidden ones.
182
764738b17b74 Updated the numbers of cmdline switches to recent mmh changes.
markus schnalke <meillo@marmaro.de>
parents: 181
diff changeset
1066 At the time of writing, no more than 4 visible switches and 1 hidden switch
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1067 have remained in mmh's
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1068 .Pn send .
182
764738b17b74 Updated the numbers of cmdline switches to recent mmh changes.
markus schnalke <meillo@marmaro.de>
parents: 181
diff changeset
1069 (These numbers include two generic switches,
764738b17b74 Updated the numbers of cmdline switches to recent mmh changes.
markus schnalke <meillo@marmaro.de>
parents: 181
diff changeset
1070 .Sw -help
764738b17b74 Updated the numbers of cmdline switches to recent mmh changes.
markus schnalke <meillo@marmaro.de>
parents: 181
diff changeset
1071 and
764738b17b74 Updated the numbers of cmdline switches to recent mmh changes.
markus schnalke <meillo@marmaro.de>
parents: 181
diff changeset
1072 .Sw -Version .)
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1073 .P
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
1074 The figure displays the number of switches for each of the tools
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1075 that is available in both nmh and mmh.
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1076 The tools are sorted by the number of switches they had in nmh.
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1077 Visible and hidden switches were counted,
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1078 but not the generic help and version switches.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1079 Whereas in the beginning of the project, the average tool had 11 switches,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1080 now it has no more than 5 \(en only half as many.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1081 If the `no' switches and similar inverse variant are folded onto
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1082 their counter-parts, the average tool had 8 switches in pre-mmh times and
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1083 has 4 now.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1084 The total number of functional switches in mmh dropped from 465
182
764738b17b74 Updated the numbers of cmdline switches to recent mmh changes.
markus schnalke <meillo@marmaro.de>
parents: 181
diff changeset
1085 to 233.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1086
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1087 .KS
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1088 .in 1c
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1089 .so input/switches.grap
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1090 .KE
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1091
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
1092 .P
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1093 A part of the switches vanished after functions were removed.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1094 This was the case for network mail transfer, for instance.
97
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markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1095 Sometimes, however, the work flow was the other way:
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1096 I looked through the
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1097 .Mp mh-chart (7)
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1098 man page to identify the tools with apparently too many switches.
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1099 Then considering the value of each of the switches by examining
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1100 the tool's man page and source code, aided by recherche and testing.
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1101 This way, the removal of functions was suggested by the aim to reduce
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1102 the number of switches per command.
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1103
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1104
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1105 .U3 "Draft Folder Facility
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1106 .P
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1107 A change early in the project was the complete transition from
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1108 the single draft message to the draft folder facility.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1109 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1110 .\" XXX ref to section ...
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1111 The draft folder facility was introduced in the mid-eighties, when
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1112 Rose and Romine called it a ``relatively new feature''.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1113 .[
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1114 rose romine real work
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1115 .]
110
4c0f13b1e0e8 Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 109
diff changeset
1116 Since then, the facility had existed but was inactive by default.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1117 The default activation and the related rework of the tools made it
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1118 possible to remove the
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1119 .Sw -[no]draftfolder ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1120 and
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1121 .Sw -draftmessage
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1122 switches from
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1123 .Pn comp ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1124 .Pn repl ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1125 .Pn forw ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1126 .Pn dist ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1127 .Pn whatnow ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1128 and
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1129 .Pn send .
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1130 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1131 The only flexibility removed with this change is having multiple
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1132 draft folders within one profile.
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1133 I consider this a theoretical problem only.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1134 At the same time, the
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1135 .Sw -draft
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1136 switch of
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1137 .Pn anno ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1138 .Pn refile ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1139 and
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1140 .Pn send
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1141 was removed.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1142 The special treatment of \fIthe\fP draft message became irrelevant after
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1143 the rework of the draft system.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1144 (cf. Sec.
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
1145 .Cf draft-folder )
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1146 Furthermore,
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1147 .Pn comp
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1148 no longer needs a
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1149 .Sw -file
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1150 switch as the draft folder facility together with the
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1151 .Sw -form
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1152 switch are sufficient.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1153
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1154
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1155 .U3 "In Place Editing
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1156 .P
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1157 .Pn anno
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1158 had the switches
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1159 .Sw -[no]inplace
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1160 to either annotate the message in place and thus preserve hard links,
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1161 or annotate a copy to replace the original message, breaking hard links.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1162 Following the assumption that linked messages should truly be the
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1163 same message, and annotating it should not break the link, the
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1164 .Sw -[no]inplace
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1165 switches were removed and the previous default
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1166 .Sw -inplace
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1167 was made the only behavior.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1168 .Ci c8195849d2e366c569271abb0f5f60f4ebf0b4d0
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1169 The
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1170 .Sw -[no]inplace
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1171 switches of
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1172 .Pn repl ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1173 .Pn forw ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1174 and
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1175 .Pn dist
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1176 could be removed, too, as they were simply passed through to
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1177 .Pn anno .
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1178 .P
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1179 .Pn burst
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1180 also had
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1181 .Sw -[no]inplace
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1182 switches, but with different meaning.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1183 With
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1184 .Sw -inplace ,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1185 the digest had been replaced by the table of contents (i.e. the
110
4c0f13b1e0e8 Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 109
diff changeset
1186 introduction text) and the burst messages were placed right
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1187 after this message, renumbering all following messages.
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1188 Also, any trailing text of the digest was lost, though,
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1189 in practice, it usually consists of an end-of-digest marker only.
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1190 Nontheless, this behavior appeared less elegant than the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1191 .Sw -noinplace
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1192 behavior, which already had been the default.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1193 Nmh's
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1194 .Mp burst (1)
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1195 man page reads:
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
1196 .QS
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1197 If
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1198 .Sw -noinplace
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1199 is given, each digest is preserved, no table
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1200 of contents is produced, and the messages contained within
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1201 the digest are placed at the end of the folder. Other messages
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1202 are not tampered with in any way.
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
1203 .QE
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1204 .LP
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1205 The decision to drop the
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1206 .Sw -inplace
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1207 behavior was supported by the code complexity and the possible data loss
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1208 it caused.
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1209 .Sw -noinplace
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1210 was chosen to be the definitive behavior.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1211 .Ci 68a686adeb39223a5e1ad35e4a24890ec053679d
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1212
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1213
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1214 .U3 "Forms and Format Strings
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1215 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1216 Historically, the tools that had
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1217 .Sw -form
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1218 switches to supply a form file had
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1219 .Sw -format
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1220 switches as well to supply the contents of a form file as a string
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1221 on the command line directly.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1222 In consequence, the following two lines equaled:
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1223 .VS
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1224 scan -form scan.mailx
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1225 scan -format "`cat .../scan.mailx`"
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1226 VE
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1227 The
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1228 .Sw -format
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1229 switches were dropped in favor for extending the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1230 .Sw -form
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1231 switches.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1232 .Ci f51956be123db66b00138f80464d06f030dbb88d
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1233 If their argument starts with an equal sign (`='),
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1234 then the rest of the argument is taken as a format string,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1235 otherwise the arguments is treated as the name of a format file.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1236 Thus, now the following two lines equal:
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1237 .VS
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1238 scan -form scan.mailx
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1239 scan -form "=`cat .../scan.mailx`"
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1240 VE
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1241 This rework removed the prefix collision between
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1242 .Sw -form
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1243 and
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1244 .Sw -format .
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1245 Now, typing
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1246 .Sw -fo
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1247 suffices to specify form or format string.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1248 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1249 The different meaning of
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1250 .Sw -format
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1251 for
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1252 .Pn repl
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1253 and
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1254 .Pn forw
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1255 was removed in mmh.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1256 .Pn forw
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1257 was completely switched to MIME-type forwarding, thus removing the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1258 .Sw -[no]format .
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1259 .Ci 6e271608b7b9c23771523f88d23a4d3593010cf1
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1260 For
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1261 .Pn repl ,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1262 the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1263 .Sw -[no]format
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1264 switches were reworked to
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1265 .Sw -[no]filter
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1266 switches.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1267 .Ci 67411b1f95d6ec987b4c732459e1ba8a8ac192c6
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1268 The
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1269 .Sw -format
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1270 switches of
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1271 .Pn send
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1272 and
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1273 .Pn post ,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1274 which had a third meaning,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1275 were removed likewise.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1276 .Ci f3cb7cde0e6f10451b6848678d95860d512224b9
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1277 Eventually, the ambiguity of the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1278 .Sw -format
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1279 switches was resolved by not anymore having any such switch in mmh.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1280
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1281
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1282 .U3 "MIME Tools
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1283 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1284 The MIME tools, which were once part of
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1285 .Pn mhn
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1286 .\" XXX
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1287 (whatever that stood for),
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1288 had several switches that added little practical value to the programs.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1289 The
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1290 .Sw -[no]realsize
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1291 switches of
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1292 .Pn mhbuild
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1293 and
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1294 .Pn mhlist
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1295 were removed, doing real size calculations always now
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1296 .Ci 8d8f1c3abc586c005c904e52c4adbfe694d2201c ,
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1297 as nmh's
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1298 .Mp mhbuild (1)
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1299 man page states
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1300 ``This provides an accurate count at the expense of a small delay.''
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1301 This small delay is not noticable on modern systems.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1302 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1303 The
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1304 .Sw -[no]check
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1305 switches were removed together with the support for
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1306 .Hd Content-MD5
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1307 header fields.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1308 .[
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1309 rfc 1864
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1310 .]
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1311 .Ci 31dc797eb5178970d68962ca8939da3fd9a8efda
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
1312 (cf. Sec.
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
1313 .Cf content-md5 )
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1314 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1315 The
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1316 .Sw -[no]ebcdicsafe
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1317 and
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1318 .Sw -[no]rfc934mode
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1319 switches of
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1320 .Pn mhbuild
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1321 were removed because they are considered obsolete.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1322 .Ci 01a3480928da485b4d6109d36d751dfa71799d58
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1323 .Ci 3363e2624dce0eb8164cf8b3f1ab385c8ff72e88
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1324 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1325 Content caching of external MIME parts, activated with the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1326 .Sw -rcache
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1327 and
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1328 .Sw -wcache
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1329 switches was completely removed.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1330 .Ci d1fefd9f614e4dc3cda16da6c69133c1b2005269
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1331 External MIME parts are rare today, having a caching facility
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1332 for them appears to be unnecessary.
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1333 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1334 In pre-MIME times,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1335 .Pn mhl
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1336 had covered many tasks that are part of MIME handling today.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1337 Therefore,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1338 .Pn mhl
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1339 could be simplified to a large extend, reducing the number of its
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1340 switches from 21 to 6.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1341 .Ci 350ad6d3542a07639213cf2a4fe524e829c1e7b6
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1342 .Ci 0e46503be3c855bddaeae3843e1b659279c35d70
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1343
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1344
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1345
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1346
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1347 .U3 "Header Printing
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1348 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1349 .Pn folder 's
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1350 data output is self-explaining enough that
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1351 displaying the header line makes little sense.
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1352 Hence, the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1353 .Sw -[no]header
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1354 switch was removed and headers are never printed.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1355 .Ci 601cc73d1fa05ce96faa728f036d6c51b91701c7
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1356 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1357 In
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1358 .Pn mhlist ,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1359 the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1360 .Sw -[no]header
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1361 switches were removed, too.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1362 .Ci b24f96523aaf60e44e04a3ffb1d22e69a13a602f
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1363 But in this case headers are always printed,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1364 because the output is not self-explaining.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1365 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1366 .Pn scan
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1367 also had
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1368 .Sw -[no]header
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1369 switches.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1370 Printing the header had been sensible until the introduction of
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1371 format strings made it impossible to display the column headings.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1372 Only the folder name and the current date remained to be printed.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1373 As this information can be perfectly retrieved by
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1374 .Pn folder
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1375 and
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1376 .Pn date ,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1377 consequently, the switches were removed.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1378 .Ci c477dc5d1d03fa6d9a8ab3dd3508c63cbddc044e
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1379 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1380 By removing all
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1381 .Sw -header
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1382 switches, the collision with
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1383 .Sw -help
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1384 on the first two letters was resolved.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1385 Currently,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1386 .Sw -h
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1387 evaluates to
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1388 .Sw -help
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1389 for all tools of mmh.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1390
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1391
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1392 .U3 "Suppressing Edits or the Invocation of the WhatNow Shell
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1393 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1394 The
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1395 .Sw -noedit
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1396 switch of
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1397 .Pn comp ,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1398 .Pn repl ,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1399 .Pn forw ,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1400 .Pn dist ,
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1401 and
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1402 .Pn whatnow
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1403 was removed, but it can now be replaced by specifying
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1404 .Sw -editor
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1405 with an empty argument.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1406 .Ci 75fca31a5b9d5c1a99c74ab14c94438d8852fba9
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1407 (Specifying
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1408 .Cl "-editor /bin/true
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1409 is nearly the same, only differing by the previous editor being set.)
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1410 .P
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1411 The more important change is the removal of the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1412 .Sw -nowhatnowproc
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1413 switch.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1414 .Ci ee4f43cf2ef0084ec698e4e87159a94c01940622
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1415 This switch had introduced an awkward behavior, as explained in nmh's
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1416 man page for
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1417 .Mp comp (1):
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
1418 .QS
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1419 The
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1420 .Sw -editor
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1421 .Ar editor
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1422 switch indicates the editor to use for
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1423 the initial edit. Upon exiting from the editor,
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1424 .Pn comp
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1425 will invoke the
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1426 .Pn whatnow
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1427 program. See
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1428 .Mp whatnow (1)
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1429 for a discussion of available options.
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1430 The invocation of this program can be
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1431 inhibited by using the
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1432 .Sw -nowhatnowproc
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1433 switch. (In truth of fact, it is the
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1434 .Pn whatnow
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1435 program which starts the initial edit.
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1436 Hence,
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1437 .Sw -nowhatnowproc
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1438 will prevent any edit from occurring.)
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
1439 .QE
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1440 .P
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1441 Effectively, the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1442 .Sw -nowhatnowproc
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1443 switch creates only a draft message.
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1444 As
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1445 .Cl "-whatnowproc /bin/true
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1446 causes the same behavior, the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1447 .Sw -nowhatnowproc
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1448 switch was removed for being redundant.
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1449 Likely, the
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1450 .Sw -nowhatnowproc
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1451 switch was intended to be used by front-ends.
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1452
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1453
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1454
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1455 .U3 "Various
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1456 .BU
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1457 With the removal of MMDF maildrop format support,
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1458 .Pn packf
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1459 and
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1460 .Pn rcvpack
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1461 no longer needed their
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1462 .Sw -mbox
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1463 and
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1464 .Sw -mmdf
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1465 switches.
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1466 .Sw -mbox
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
1467 is the sole behavior now.
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1468 .Ci 3916ab66ad5d183705ac12357621ea8661afd3c0
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
1469 Further rework in both tools made the
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1470 .Sw -file
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
1471 switch unnecessary.
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1472 .Ci ca1023716d4c2ab890696f3e41fa0d94267a940e
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1473
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1474 .BU
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1475 Mmh's tools will no longer clear the screen (\c
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1476 .Pn scan 's
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1477 and
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1478 .Pn mhl 's
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1479 .Sw -[no]clear
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1480 switches
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1481 .Ci e57b17343dcb3ff373ef4dd089fbe778f0c7c270
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1482 .Ci 943765e7ac5693ae177fd8d2b5a2440e53ce816e ).
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1483 Neither will
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1484 .Pn mhl
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1485 ring the bell (\c
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1486 .Sw -[no]bell
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1487 .Ci e11983f44e59d8de236affa5b0d0d3067c192e24 )
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1488 nor page the output itself (\c
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1489 .Sw -length
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1490 .Ci 5b9d883db0318ed2b84bb82dee880d7381f99188 ).
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1491 .\" XXX Ref
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1492 Generally, the pager to use is no longer specified with the
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1493 .Sw -[no]moreproc
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1494 command line switches for
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1495 .Pn mhl
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1496 and
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1497 .Pn show /\c
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1498 .Pn mhshow .
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1499 .Ci 39e87a75b5c2d3572ec72e717720b44af291e88a
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1500
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1501 .BU
96
12348d620245 Spell checking.
markus schnalke <meillo@marmaro.de>
parents: 95
diff changeset
1502 In order to avoid prefix collisions among switch names, the
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1503 .Sw -version
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1504 switch was renamed to
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1505 .Sw -Version
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1506 (with capital `V').
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1507 .Ci 32b2354dbaf4bf934936eb5b102a4a3d2fdd209a
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1508 Every program has the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1509 .Sw -version
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1510 switch but its first three letters collided with the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1511 .Sw -verbose
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1512 switch, present in many programs.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1513 The rename solved this problem once for all.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1514 Although this rename breaks a basic interface, having the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1515 .Sw -V
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1516 abbreviation to display the version information, isn't all too bad.
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1517
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1518 .BU
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1519 .Sw -[no]preserve
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1520 of
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1521 .Pn refile
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
1522 was removed
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
1523 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
1524 because what use was it anyway?
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
1525 Quoting nmh's man page
165
ea6eec1722d1 Improvement by Boris Kraut.
markus schnalke <meillo@marmaro.de>
parents: 164
diff changeset
1526 .Mp refile (1):
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
1527 .QS
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1528 Normally when a message is refiled, for each destination
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1529 folder it is assigned the number which is one above the current
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1530 highest message number in that folder. Use of the
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1531 .Sw -preserv
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1532 [sic!] switch will override this message renaming, and try
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1533 to preserve the number of the message. If a conflict for a
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1534 particular folder occurs when using the
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1535 .Sw -preserve
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1536 switch, then
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1537 .Pn refile
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1538 will use the next available message number which
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1539 is above the message number you wish to preserve.
98
d894191d7a33 style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents: 97
diff changeset
1540 .QE
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1541
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1542 .BU
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1543 The removal of the
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1544 .Sw -[no]reverse
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1545 switches of
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1546 .Pn scan
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1547 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1548 is a bug fix, supported by the comments
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1549 ``\-[no]reverse under #ifdef BERK (I really HATE this)''
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1550 by Rose and
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1551 ``Lists messages in reverse order with the `\-reverse' switch.
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1552 This should be considered a bug.'' by Romine in the documentation.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1553 .\" XXX Ref: welche datei genau.
97
29a7454fcded Added references to commits.
markus schnalke <meillo@marmaro.de>
parents: 96
diff changeset
1554 The question remains why neither Rose and Romine had fixed this
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1555 bug in the eighties when they wrote these comments nor has anyone
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1556 thereafter.
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
1557
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
1558
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1559 .ig
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
1560
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1561 forw: [no]dashstuffing(mhl)
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1562
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1563 mhshow: [no]pause [no]serialonly
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1564
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1565 mhmail: resent queued
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1566 inc: snoop, (pop)
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1567
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1568 mhl: [no]faceproc folder sleep
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1569 [no]dashstuffing(forw) digest list volume number issue number
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1570
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1571 prompter: [no]doteof
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1572
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1573 refile: [no]preserve [no]unlink [no]rmmproc
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1574
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1575 send: [no]forward [no]mime [no]msgid
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1576 [no]push split [no]unique (sasl) width snoop [no]dashstuffing
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1577 attach attachformat
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1578 whatnow: (noedit) attach
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1579
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1580 slocal: [no]suppressdups
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1581
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1582 spost: [no]filter [no]backup width [no]push idanno
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1583 [no]check(whom) whom(whom)
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1584
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1585 whom: ???
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1586
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1587 ..
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1588
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1589
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1590 .ig
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1591
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1592 .P
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1593 In the best case, all switches are unambiguous on the first character,
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1594 or on the three-letter prefix for the `no' variants.
96
12348d620245 Spell checking.
markus schnalke <meillo@marmaro.de>
parents: 95
diff changeset
1595 Reducing switch prefix collisions, shortens the necessary prefix length
93
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1596 the user must type.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1597 Having less switches helps best.
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1598
093ccf39a45e Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents: 89
diff changeset
1599 ..
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
1600
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1601
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1602 .\" XXX: whatnow prompt commands
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1603
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1604
95
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1605
edac7e46a9f2 More text about switches.
markus schnalke <meillo@marmaro.de>
parents: 93
diff changeset
1606
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
1607 .\" --------------------------------------------------------------
74
cefaa856d431 A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents: 72
diff changeset
1608 .H1 "Modernizing
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1609 .P
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1610 In the more than thirty years of MH's existence, its code base was
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1611 increasingly extended.
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
1612 New features entered the project and became alternatives to the
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
1613 existing behavior.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
1614 Relicts from several decades have gathered in the code base,
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
1615 but seldom obsolete features were dropped.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
1616 This section describes the removing of old code
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
1617 and the modernizing of the default setup.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
1618 It focuses on the functional aspect only;
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
1619 the non-functional aspects of code style are discussed in Sec.
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
1620 .Cf code-style .
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
1621
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
1622
100
6ae7dc4a3a02 Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 98
diff changeset
1623 .H2 "Code Relicts
12
7ca384d68edc Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents: 0
diff changeset
1624 .P
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1625 My position regarding the removal of obsolete functions of mmh,
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1626 .\" XXX ``in order to remove old code,''
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1627 is much more revolutional than the nmh community appreciates.
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1628 Working on an experimental version, I was quickly able to drop
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1629 functionality I considered ancient.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1630 The need for consensus with peers would have slowed this process down.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1631 Without the need to justify my decisions, I was able to rush forward.
110
4c0f13b1e0e8 Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 109
diff changeset
1632 In December 2011, Paul Vixie motivated the nmh developers to just
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1633 .\" XXX ugs
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1634 do the work:
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1635 .[
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1636 paul vixie edginess nmh-workers
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1637 .]
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1638 .QS
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1639 let's stop walking on egg shells with this code base. there's no need to
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1640 discuss whether to keep using vfork, just note in [sic!] passing, [...]
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1641 we don't need a separate branch for removing vmh
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1642 or ridding ourselves of #ifdef's or removing posix replacement functions
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1643 or depending on pure ansi/posix ``libc''.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1644 .QP
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
1645 these things should each be a day or two of work and the ``main branch''
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1646 should just be modern. [...]
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1647 let's push forward, aggressively.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1648 .QE
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1649 .LP
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1650 I did so already in the months before.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1651 I pushed forward.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1652 .\" XXX semicolon ?
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1653 I simply dropped the cruft.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1654 .P
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1655 The decision to drop a feature was based on literature research and
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1656 careful thinking, but whether having had contact with this particular
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1657 feature within my own computer life served as a rule of thumb.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1658 I explained my reasons in the commit messages
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1659 in the version control system.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1660 Hence, others can comprehend my view and argue for undoing the change
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1661 if I have missed an important aspect.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1662 I was quick in dropping parts.
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
1663 I rather include falsely dropped parts again, than going at a slower pace.
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
1664 Mmh is experimental work; it requires tough decisions.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1665 .\" XXX ``exp. work'' schon oft gesagt
12
7ca384d68edc Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents: 0
diff changeset
1666
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1667
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1668 .U3 "Forking
0
dc2bfef4cda7 Initial commit: Basic structure, macros and fonts.
markus schnalke <meillo@marmaro.de>
parents:
diff changeset
1669 .P
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1670 Being a tool chest, MH creates many processes.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1671 In earlier times
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1672 .Fu fork()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1673 had been an expensive system call, because the process's image needed
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1674 to be completely duplicated at once.
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1675 This expensive work was especially unnecessary in the commonly occuring
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1676 case wherein the image is replaced by a call to
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1677 .Fu exec()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1678 right after having forked the child process.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1679 The
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1680 .Fu vfork()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1681 system call was invented to speed up this particular case.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1682 It completely omits the duplication of the image.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1683 On old systems this resulted in significant speed ups.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1684 Therefore MH used
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1685 .Fu vfork()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1686 whenever possible.
12
7ca384d68edc Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents: 0
diff changeset
1687 .P
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1688 Modern memory management units support copy-on-write semantics, which make
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1689 .Fu fork()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1690 almost as fast as
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1691 .Fu vfork() .
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1692 The man page of
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1693 .Mp vfork (2)
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1694 in FreeBSD 8.0 states:
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1695 .QS
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1696 This system call will be eliminated when proper system sharing mechanisms
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1697 are implemented. Users should not depend on the memory sharing semantics
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1698 of vfork() as it will, in that case, be made synonymous to fork(2).
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1699 .QE
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1700 .LP
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1701 Vixie supports the removal with the note that ``the last
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1702 system on which fork was so slow that an mh user would notice it, was
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1703 Eunice. that was 1987''.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1704 .[
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1705 nmh-workers vixie edginess
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1706 .]
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1707 I replaced all calls to
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1708 .Fu vfork()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1709 with calls to
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1710 .Fu fork() .
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1711 .Ci 40821f5c1316e9205a08375e7075909cc9968e7d
12
7ca384d68edc Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents: 0
diff changeset
1712 .P
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1713 Related to the costs of
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1714 .Fu fork()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1715 is the probability of its success.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1716 In the eighties, on heavy loaded systems, calls to
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1717 .Fu fork()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1718 were prone to failure.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1719 Hence, many of the
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1720 .Fu fork()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1721 calls in the code were wrapped into loops to retry the
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1722 .Fu fork()
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1723 several times, to increase the chances to succeed, eventually.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1724 On modern systems, a failing
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1725 .Fu fork()
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1726 call is unusual.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1727 Hence, in the rare case when
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1728 .Fu fork()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1729 fails, mmh programs simply abort.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1730 .Ci 5fbf37ee68e018998ada61eeab73e035b26834b6
12
7ca384d68edc Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents: 0
diff changeset
1731
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1732
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1733 .U3 "Header Fields
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1734 .BU
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1735 The
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1736 .Hd Encrypted
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1737 header field was introduced by RFC\|822,
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1738 but already marked as legacy in RFC\|2822.
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1739 Today, OpenPGP provides the basis for standardized exchange of encrypted
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1740 messages [RFC\|4880, RFC\|3156].
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1741 Hence, the support for
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1742 .Hd Encrypted
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1743 header fields is removed in mmh.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1744 .Ci 064527f7b57ab050e5af13e15ad99aeeab125857
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1745 .BU
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1746 The native support for
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1747 .Hd Face
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1748 header fields has been removed, as well.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1749 .Ci 8e5be81f784682822f5e868c1bf3c8624682bd23
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1750 This feature is similar to the
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1751 .Hd X-Face
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1752 header field in its intent,
21
bb8a8be49024 Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents: 20
diff changeset
1753 but takes a different approach to store the image.
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1754 Instead of encoding the image data directly into the header field,
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1755 it contains the hostname and UDP port where the image
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1756 date can be retrieved.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1757 There is even a third Face system,
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1758 which is the successor of
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1759 .Hd X-Face ,
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1760 although it re-uses the
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1761 .Hd Face
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1762 header field.
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1763 It was invented in 2005 and supports colored PNG images.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1764 None of the Face systems described here is popular today.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1765 Hence, mmh has no direct support for them.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1766 .BU
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
1767 .Id content-md5
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1768 The
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1769 .Hd Content-MD5
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1770 header field was introduced by RFC\|1864.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1771 It provides detection of data corruption during the transfer.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1772 But it can not ensure verbatim end-to-end delivery of the contents
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1773 [RFC\|1864].
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1774 The proper approach to verify content integrity in an
166
f102dcc06bb9 s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents: 165
diff changeset
1775 end-to-end relationship is the use of digital signatures.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1776 .\" XXX (RFCs FIXME).
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1777 On the other hand, transfer protocols should detect corruption during
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1778 the transmission.
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1779 The TCP includes a checksum field therefore.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1780 These two approaches in combinations render the
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1781 .Hd Content-MD5
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1782 header field superfluous.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1783 Not a single one out of 4\|200 messages from two decades
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1784 in an nmh-workers mailing list archive contains a
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1785 .Hd Content-MD5
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1786 header field.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1787 Neither did any of the 60\|000 messages in my personal mail storage.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1788 Removing the support for this header field,
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1789 removed the last place where MD5 computation was needed.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1790 .Ci 31dc797eb5178970d68962ca8939da3fd9a8efda
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1791 Hence, the MD5 code could be removed as well.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1792 Over 500 lines of code vanished by this one change.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1793
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1794
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1795 .U3 "MMDF maildrop support
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1796 .P
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1797 This type of format is conceptionally similar to the mbox format,
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1798 but uses a different message delimiter (`\fL\\1\\1\\1\\1\fP',
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
1799 commonly written as `\fL^A^A^A^A\fP', instead of `\fLFrom\0\fP').
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1800 Mbox is the de-facto standard maildrop format on Unix,
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1801 whereas the MMDF maildrop format is now forgotten.
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1802 By dropping the MMDF maildrop format support,
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1803 mbox became the only packed mailbox format supported in mmh.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1804 .P
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1805 The simplifications within the code were moderate.
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1806 Mainly, the reading and writing of MMDF mailbox files was removed.
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1807 But also, switches of
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1808 .Pn packf
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1809 and
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1810 .Pn rcvpack
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1811 could be removed.
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1812 .Ci 3916ab66ad5d183705ac12357621ea8661afd3c0
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1813 In the message parsing function
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1814 .Fn sbr/m_getfld.c ,
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1815 knowledge of MMDF packed mail boxes was removed.
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1816 .Ci 684ec30d81e1223a282764452f4902ed4ad1c754
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1817 Further code structure simplifications may be possible there,
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1818 because only one single packed mailbox format is left to be supported.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1819 I have not worked on them yet because
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1820 .Fu m_getfld()
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1821 is heavily optimized and thus dangerous to touch.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1822 The risk of damaging the intricate workings of the optimized code is
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1823 too high.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1824
12
7ca384d68edc Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents: 0
diff changeset
1825
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1826 .U3 "Prompter's Control Keys
20
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1827 .P
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1828 The program
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1829 .Pn prompter
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1830 queries the user to fill in a message form.
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1831 When used by
20
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1832 .Pn comp
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1833 as
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1834 .Cl "comp -editor prompter" ,
20
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1835 the resulting behavior is similar to
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1836 .Pn mailx .
51
49cf68506b5d Spell checking.
markus schnalke <meillo@marmaro.de>
parents: 49
diff changeset
1837 Apparently,
20
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1838 .Pn prompter
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
1839 had not been touched lately.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1840 Otherwise it's hardly explainable why it
20
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1841 still offered the switches
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1842 .Sw -erase
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1843 .Ar chr
20
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1844 and
84
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1845 .Sw -kill
c35ec2b7de5d style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents: 82
diff changeset
1846 .Ar chr
20
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1847 to name the characters for command line editing.
21
bb8a8be49024 Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents: 20
diff changeset
1848 The times when this had been necessary are long time gone.
20
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1849 Today these things work out-of-the-box, and if not, are configured
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1850 with the standard tool
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1851 .Pn stty .
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1852 The switches are removed now
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1853 .Ci 0bd9750710cdbab80cfb4036dd87af20afe1552f .
20
7a100c80fa91 Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents: 19
diff changeset
1854
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1855
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1856 .U3 "Hardcopy Terminal Support
21
bb8a8be49024 Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents: 20
diff changeset
1857 .P
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1858 More of a funny anecdote is a check for being connected to a
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1859 hardcopy terminal.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1860 It remained in the code until spring 2012, when I finally removed it
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1861 .Ci b7764c4a6b71d37918a97594d866258f154017ca .
21
bb8a8be49024 Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents: 20
diff changeset
1862 .P
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1863 The check only prevented a pager to be placed between the printing
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1864 program (\c
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1865 .Pn mhl )
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1866 and the terminal.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1867 In nmh, this could have been ensured statically with the
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1868 .Sw -nomoreproc
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1869 at the command line, too.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
1870 In mmh, setting the profile entry
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1871 .Pe Pager
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1872 or the environment variable
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1873 .Ev PAGER
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1874 to
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1875 .Pn cat
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1876 is sufficient.
104
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1877
2818ca27d24c Various text rework.
markus schnalke <meillo@marmaro.de>
parents: 102
diff changeset
1878
21
bb8a8be49024 Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents: 20
diff changeset
1879
12
7ca384d68edc Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents: 0
diff changeset
1880
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
1881 .H2 "Attachments
22
99409e4546d2 Wrote about the removal of tools.
markus schnalke <meillo@marmaro.de>
parents: 21
diff changeset
1882 .P
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1883 The mind model of email attachments is unrelated to MIME.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1884 Although the MIME RFCs (2045 through 2049) define the technical
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1885 requirements for having attachments, they do not mention the word
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
1886 attachment.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1887 Instead of attachments, MIME talks about ``multi-part message bodies''
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1888 [RFC\|2045], a more general concept.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1889 Multi-part messages are messages
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1890 ``in which one or more different
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1891 sets of data are combined in a single body''
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1892 [RFC\|2046].
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1893 MIME keeps its descriptions generic;
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1894 it does not imply specific usage models.
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1895 One usage model became prevalent: attachments.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1896 The idea is having a main text document with files of arbitrary kind
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1897 attached to it.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1898 In MIME terms, this is a multi-part message having a text part first
110
4c0f13b1e0e8 Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 109
diff changeset
1899 and parts of arbitrary type following.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1900 .P
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1901 MH's MIME support is a direct implementation of the RFCs.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1902 The perception of the topic described in the RFCs is clearly visible
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1903 in MH's implementation.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1904 .\" XXX rewrite ``no idea''.
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1905 As a result,
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1906 MH had all the MIME features but no idea of attachments.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
1907 But users do not need all the MIME features,
109
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1908 they want convenient attachment handling.
2b094b8fb422 Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents: 108
diff changeset
1909
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1910
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1911 .U3 "Composing MIME Messages
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1912 .P
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1913 In order to improve the situation on the message composing side,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1914 Jon Steinhart had added an attachment system to nmh in 2002.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1915 .Ci 7480dbc14bc90f2d872d434205c0784704213252
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1916 In the file
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1917 .Fn docs/README-ATTACHMENTS ,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1918 he described his motivation to do so as such:
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1919 .QS
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1920 Although nmh contains the necessary functionality for MIME message
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1921 handing [sic!], the interface to this functionality is pretty obtuse.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1922 There's no way that I'm ever going to convince my partner to write
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1923 .Pn mhbuild
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1924 composition files!
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1925 .QE
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1926 .LP
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1927 With this change, the mind model of attachments entered nmh.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1928 In the same document:
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1929 .QS
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1930 These changes simplify the task of managing attachments on draft files.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1931 They allow attachments to be added, listed, and deleted.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1932 MIME messages are automatically created when drafts with attachments
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1933 are sent.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1934 .QE
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1935 .LP
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1936 Unfortunately, the attachment system,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1937 like any new facilities in nmh,
110
4c0f13b1e0e8 Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 109
diff changeset
1938 was inactive by default.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1939 .P
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1940 During my work in Argentina, I tried to improve the attachment system.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1941 But, because of great opposition in the nmh community,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1942 my patch died as a proposal on the mailing list, after long discussions.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1943 .[
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1944 nmh-workers attachment proposal
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1945 .]
110
4c0f13b1e0e8 Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 109
diff changeset
1946 In January 2012, I extended the patch and applied it to mmh.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1947 .Ci 8ff284ff9167eff8f5349481529332d59ed913b1
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1948 In mmh, the attachment system is active by default.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1949 Instead of command line switches, the
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1950 .Pe Attachment-Header
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1951 profile entry is used to specify
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1952 the name of the attachment header field.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1953 It is pre-defined to
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1954 .Hd Attach .
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1955 .P
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1956 To add an attachment to a draft, a header line needs to be added:
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1957 .VS
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1958 To: bob
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1959 Subject: The file you wanted
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1960 Attach: /path/to/the/file-bob-wanted
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1961 --------
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1962 Here it is.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1963 VE
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1964 The header field can be added to the draft manually in the editor,
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1965 or by using the `attach' command at the WhatNow prompt, or
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1966 non-interactively with
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1967 .Pn anno :
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1968 .VS
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1969 anno -append -nodate -component Attach -text /path/to/attachment
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1970 VE
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1971 Drafts with attachment headers are converted to MIME automatically by
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1972 .Pn send .
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1973 The conversion to MIME is invisible to the user.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1974 The draft stored in the draft folder is always in source form with
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1975 attachment headers.
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
1976 If the MIMEification fails (e.g. because the file to attach
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
1977 is not accessible) the original draft is not changed.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1978 .P
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1979 The attachment system handles the forwarding of messages, too.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
1980 If the attachment header value starts with a plus character (`\fL+\fP'),
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1981 like in
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1982 .Cl "Attach: +bob 30 42" ,
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
1983 the given messages in the specified folder will be attached.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1984 This allowed to simplify
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1985 .Pn forw .
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1986 .Ci f41f04cf4ceca7355232cf7413e59afafccc9550
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1987 .P
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1988 Closely related to attachments is non-ASCII text content,
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1989 because it requires MIME too.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1990 In nmh, the user needed to call `mime' at the WhatNow prompt
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1991 to have the draft converted to MIME.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1992 This was necessary whenever the draft contained non-ASCII characters.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1993 If the user did not call `mime', a broken message would be sent.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1994 Therefore, the
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1995 .Pe automimeproc
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1996 profile entry could be specified to have the `mime' command invoked
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
1997 automatically each time.
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
1998 Unfortunately, this approach conflicted with the attachment system
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
1999 because the draft would already be in MIME format at the time
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2000 when the attachment system wanted to MIMEify it.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2001 To use nmh's attachment system, `mime' must not be called at the
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2002 WhatNow prompt and
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2003 .Pe automimeproc
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2004 must not be set in the profile.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2005 But then the case of non-ASCII text without attachment headers was
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2006 not caught.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2007 All in all, the solution was complex and irritating.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2008 My patch from December 2010
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2009 .[
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2010 nmh-workers attachment proposal
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2011 .]
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2012 would have simplified the situation.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2013 .P
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2014 Mmh's current solution is even more elaborate.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2015 Any necessary MIMEification is done automatically.
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2016 There is no `mime' command at the WhatNow prompt anymore.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2017 The draft will be converted automatically to MIME when either an
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2018 attachment header or non-ASCII text is present.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
2019 Furthermore, the hash character (`\fL#\fP') is not special any more
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2020 at line beginnings in the draft message.
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2021 .\" XXX REF ?
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2022 Users need not concern themselves with the whole topic at all.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2023 .P
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2024 Although the new approach does not anymore support arbitrary MIME
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2025 compositions directly, the full power of
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2026 .Pn mhbuild
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2027 can still be accessed.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2028 Given no attachment headers are included, the user can create
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2029 .Pn mhbuild
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2030 composition drafts like in nmh.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2031 Then, at the WhatNow prompt, he needs to invoke
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2032 .Cl "edit mhbuild
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2033 to convert it to MIME.
110
4c0f13b1e0e8 Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 109
diff changeset
2034 Because the resulting draft does neither contain non-ASCII characters
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2035 nor has it attachment headers, the attachment system will not touch it.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2036 .P
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2037 The approach taken in mmh is tailored towards today's most common case:
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2038 a text part, possibly with attachments.
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2039 This case was simplified.
101
e8e6adb14beb Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents: 100
diff changeset
2040
112
4e6a9ae1b53c Added a bit of text on modern defaults; plus added code refs.
markus schnalke <meillo@marmaro.de>
parents: 110
diff changeset
2041
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2042 .U3 "MIME Type Guessing
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2043 .P
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2044 From the programmer's point of view, the use of
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2045 .Pn mhbuild
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2046 composition drafts had one notable advantage over attachment headers:
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2047 The user provides the appropriate MIME types for files to include.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2048 The attachment system needs to find out the correct MIME type itself.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2049 This is a difficult task, yet it spares the user irritating work.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2050 Determining the correct MIME type of content is partly mechanical,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2051 partly intelligent work.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2052 Forcing the user to find out the correct MIME type,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2053 forces him to do partly mechanical work.
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
2054 Letting the computer do the work can lead to bad choices for difficult
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2055 content.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2056 For mmh, the latter option was chosen.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2057 .P
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2058 Determining the MIME type by the suffix of the file name is a dumb
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2059 approach, yet it is simple to implement and provides good results
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2060 for the common cases.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2061 Mmh implements this approach in the
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2062 .Pn print-mimetype
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2063 script.
112
4e6a9ae1b53c Added a bit of text on modern defaults; plus added code refs.
markus schnalke <meillo@marmaro.de>
parents: 110
diff changeset
2064 .Ci 4b5944268ea0da7bb30598a27857304758ea9b44
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2065 Using it is the default choice.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2066 .P
112
4e6a9ae1b53c Added a bit of text on modern defaults; plus added code refs.
markus schnalke <meillo@marmaro.de>
parents: 110
diff changeset
2067 A far better, though less portable, approach is the use of
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2068 .Pn file .
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2069 This standard tool tries to determine the type of files.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2070 Unfortunately, its capabilities and accuracy varies from system to system.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2071 Additionally, its output was only intended for human beings,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2072 but not to be used by programs.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2073 It varies much.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2074 Nevertheless, modern versions of GNU
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2075 .Pn file ,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2076 which is prevalent on the popular GNU/Linux systems,
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2077 provide MIME type output in machine-readable form.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2078 Although this solution is highly system-dependent,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2079 it solves the difficult problem well.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2080 On systems where GNU
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2081 .Pn file ,
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2082 version 5.04 or higher, is available it should be used.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2083 One needs to specify the following profile entry to do so:
112
4e6a9ae1b53c Added a bit of text on modern defaults; plus added code refs.
markus schnalke <meillo@marmaro.de>
parents: 110
diff changeset
2084 .Ci 3baec236a39c5c89a9bda8dbd988d643a21decc6
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2085 .VS
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2086 Mime-Type-Query: file -b --mime
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2087 VE
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2088 .LP
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2089 Other versions of
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2090 .Pn file
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2091 might possibly be usable with wrapper scripts to reformat the output.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2092 The diversity among
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2093 .Pn file
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2094 implementations is great; one needs to check the local variant.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2095 .P
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2096 If no MIME type can be determined, text content gets sent as
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2097 `text/plain' and anything else under the generic fall-back type
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2098 `application/octet-stream'.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2099 It is not possible in mmh to override the automatic MIME type guessing
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2100 for a specific file.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2101 To do so, either the user would need to know in advance for which file
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2102 the automatic guessing fails, or the system would require interaction.
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2103 I consider both cases impractical.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2104 The existing solution should be sufficient.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2105 If not, the user may always fall back to
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2106 .Pn mhbuild
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2107 composition drafts and ignore the attachment system.
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2108
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2109
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2110 .U3 "Storing Attachments
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2111 .P
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
2112 Extracting MIME parts of a message and storing them to disk is performed by
108
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2113 .Pn mhstore .
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2114 The program has two operation modes,
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2115 .Sw -auto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2116 and
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2117 .Sw -noauto .
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2118 With the former one, each part is stored under the filename given in the
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2119 MIME part's meta information, if available.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2120 This naming information is usually available for modern attachments.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2121 If no filename is available, this MIME part is stored as if
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2122 .Sw -noauto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2123 would have been specified.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2124 In the
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2125 .Sw -noauto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2126 mode, the parts are processed according to rules, defined by
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2127 .Pe mhstore-store-*
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2128 profile entries.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2129 These rules define generic filename templates for storing
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2130 or commands to post-process the contents in arbitrary ways.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2131 If no matching rule is available the part is stored under a generic
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2132 filename, built from message number, MIME part number, and MIME type.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2133 .P
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2134 The
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2135 .Sw -noauto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2136 mode had been the default in nmh because it was considered safe,
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2137 in contrast to the
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2138 .Sw -auto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2139 mode.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2140 In mmh,
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2141 .Sw -auto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2142 is not dangerous anymore.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2143 Two changes were necessary:
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2144 .LI 1
108
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2145 Any directory path is removed from the proposed filename.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2146 Thus, the files are always stored in the expected directory.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2147 .Ci 41b6eadbcecf63c9a66aa5e582011987494abefb
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2148 .LI 2
108
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2149 Tar files are not extracted automatically any more.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2150 Thus, the rest of the file system will not be touched.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2151 .Ci 94c80042eae3383c812d9552089953f9846b1bb6
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2152 .LP
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2153 Now, the outcome of mmh's
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2154 .Cl "mhstore -auto
110
4c0f13b1e0e8 Spellchecked.
markus schnalke <meillo@marmaro.de>
parents: 109
diff changeset
2155 can be foreseen from the output of
108
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2156 .Cl "mhlist -verbose" .
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2157 .P
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2158 The
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2159 .Sw -noauto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2160 mode is seen to be more powerful but less convenient.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2161 On the other hand,
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2162 .Sw -auto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2163 is safe now and
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2164 storing attachments under their original name is intuitive.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2165 Hence,
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2166 .Sw -auto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2167 serves better as the default option.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2168 .Ci 3410b680416c49a7617491af38bc1929855a331d
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2169 .P
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2170 Files are stored into the directory given by the
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2171 .Pe Nmh-Storage
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2172 profile entry, if set, or
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2173 into the current working directory, otherwise.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2174 Storing to different directories is only possible with
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2175 .Pe mhstore-store-*
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2176 profile entries.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2177 .P
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2178 Still, in both modes, existing files get overwritten silently.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2179 This can be considered a bug.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2180 Yet, each other behavior has its draw-backs, too.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2181 Refusing to replace files requires adding a
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2182 .Sw -force
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2183 option.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2184 Users will likely need to invoke
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2185 .Pn mhstore
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2186 a second time with
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2187 .Sw -force .
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2188 Eventually, only the user can decide in the specific case.
108
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2189 This requires interaction, which I like to avoid if possible.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2190 Appending a unique suffix to the filename is another bad option.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2191 For now, the behavior remains as it is.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2192 .P
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2193 In mmh, only MIME parts of type message are special in
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2194 .Pn mhstore 's
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2195 .Sw -auto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2196 mode.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2197 Instead of storing message/rfc822 parts as files to disk,
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2198 they are stored as messages into the current mail folder.
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2199 The same applies to message/partial, although the parts are
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2200 automatically reassembled beforehand.
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2201 MIME parts of type message/external-body are not automatically retrieved
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2202 anymore.
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2203 Instead, information on how to retrieve them is output.
108
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2204 Not supporting this rare case saved nearly one thousand lines of code.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2205 .Ci 55e1d8c654ee0f7c45b9361ce34617983b454c32
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2206 .\" XXX mention somewhere else too: (The profile entry `nmh-access-ftp'
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2207 .\" and sbr/ruserpass.c for reading ~/.netrc are gone now.)
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2208 `application/octet-stream; type=tar' is not special anymore.
108
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2209 Automatically extracting such MIME parts had been the dangerous part
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2210 of the
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2211 .Sw -auto
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2212 mode.
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2213 .Ci 94c80042eae3383c812d9552089953f9846b1bb6
dd5620bf8659 Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents: 107
diff changeset
2214
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2215
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2216
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2217 .U3 "Showing MIME Messages
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2218 .P
114
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2219 The program
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2220 .Pn mhshow
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2221 had been written to display MIME messages.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2222 It implemented the conceptional view of the MIME RFCs.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2223 Nmh's
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2224 .Pn mhshow
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2225 handled each MIME part independently, presenting them separately
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2226 to the user.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2227 This does not match today's understanding of email attachments,
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2228 where displaying a message is seen to be a single, integrated operation.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2229 Today, email messages are expected to consist of a main text part
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2230 plus possibly attachments.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2231 They are not any more seen to be arbitrary MIME hierarchies with
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2232 information on how to display the individual parts.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2233 I adjusted
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2234 .Pn mhshow 's
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2235 behavior to the modern view on the topic.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2236 .P
159
8b411125645d Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents: 157
diff changeset
2237 One should note that this section completely ignores the original
114
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2238 .Pn show
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2239 program, because it was not capable to display MIME messages
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2240 and is no longer part of mmh.
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
2241 .\" XXX ref to other section
114
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2242 Although
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2243 .Pn mhshow
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2244 was renamed to
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2245 .Pn show
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2246 in mmh, this section uses the name
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2247 .Pn mhshow ,
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2248 in order to avoid confusion.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2249 .P
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2250 In mmh, the basic idea is that
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2251 .Pn mhshow
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2252 should display a message in one single pager session.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2253 Therefore,
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2254 .Pn mhshow
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2255 invokes a pager session for all its output,
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2256 whenever it prints to a terminal.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2257 .Ci a4197ea6ffc5c1550e8b52d5a654bcaaaee04a4e
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2258 In consequence,
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2259 .Pn mhl
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2260 does no more invoke a pager.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2261 .Ci 0e46503be3c855bddaeae3843e1b659279c35d70
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2262 With
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2263 .Pn mhshow
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2264 replacing the original
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2265 .Pn show ,
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2266 output from
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2267 .Pn mhl
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2268 does not go to the terminal directly, but through
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2269 .Pn mhshow .
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2270 Hence,
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2271 .Pn mhl
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2272 does not need to invoke a pager.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2273 The one and only job of
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2274 .Pn mhl
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2275 is to format messages or parts of them.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2276 The only place in mmh, where a pager is invoked is
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2277 .Pn mhshow .
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2278 .P
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2279 .Pe mhshow-show-*
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2280 profile entries can be used to display MIME parts in a specific way.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2281 For instance, PDF and Postscript files could be converted to plain text
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2282 to display them in the terminal.
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
2283 In mmh, MIME parts will always be displayed serially.
114
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2284 The request to display the MIME type `multipart/parallel' in parallel
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2285 is ignored.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2286 It is simply treated as `multipart/mixed'.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2287 .Ci d0581ba306a7299113a346f9b4c46ce97bc4cef6
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2288 This could already be requested with the, now removed,
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2289 .Sw -serialonly
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2290 switch of
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2291 .Pn mhshow .
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
2292 As MIME parts are always processed exclusively, i.e. serially,
114
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2293 the `%e' escape in
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2294 .Pe mhshow-show-*
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2295 profile entries became useless and was thus removed.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2296 .Ci a20d405db09b7ccca74d3e8c57550883da49e1ae
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2297 .P
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2298 In the intended setup, only text content would be displayed.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2299 Non-text content would be converted to text by appropriate
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2300 .Pe mhshow-show-*
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2301 profile entries before, if possible and wanted.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2302 All output would be displayed in a single pager session.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2303 Other kinds of attachments are ignored.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2304 With
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2305 .Pe mhshow-show-*
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2306 profile entries for them, they can be displayed serially along
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2307 the message.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2308 For parallel display, the attachments need to be stored to disk first.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2309 .P
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2310 To display text content in foreign charsets, they need to be converted
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2311 to the native charset.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2312 Therefore,
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2313 .Pe mhshow-charset-*
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2314 profile entries used to be needed.
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
2315 In mmh, the conversion is performed automatically by piping the
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
2316 text through the
114
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2317 .Pn iconv
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2318 command, if necessary.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2319 .Ci 2433122c20baccb10b70b49c04c6b0497b5b3b60
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2320 Custom
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2321 .Pe mhshow-show-*
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2322 rules for textual content might need a
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2323 .Cl "iconv -f %c %f |
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2324 prefix to have the text converted to the native charset.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2325 .P
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
2326 Although the conversion of foreign charsets to the native one
114
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2327 has improved, it is not consistent enough.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2328 Further work needs to be done and
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2329 the basic concepts in this field need to be re-thought.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2330 Though, the default setup of mmh displays message in foreign charsets
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2331 correctly without the need to configure anything.
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2332
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2333
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2334 .ig
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2335
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2336 .P
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2337 mhshow/mhstore: Removed support for retrieving message/external-body parts.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
2338 These tools will not download the contents automatically anymore. Instead,
114
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2339 they print the information needed to get the contents. If someone should
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2340 really receive one of those rare message/external-body messages, he can
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2341 do the job manually. We save nearly a thousand lines of code. That's worth
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2342 it!
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2343 (The profile entry `nmh-access-ftp' and sbr/ruserpass.c for reading
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2344 ~/.netrc are gone now.)
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2345 .Ci 55e1d8c654ee0f7c45b9361ce34617983b454c32
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2346
92cbd3fa1c40 Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents: 112
diff changeset
2347 ..
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2348
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
2349
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
2350
166
f102dcc06bb9 s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents: 165
diff changeset
2351 .H2 "Signing and Encrypting
22
99409e4546d2 Wrote about the removal of tools.
markus schnalke <meillo@marmaro.de>
parents: 21
diff changeset
2352 .P
166
f102dcc06bb9 s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents: 165
diff changeset
2353 Nmh offers no direct support for digital signatures and message encryption.
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2354 This functionality needed to be added through third-party software.
166
f102dcc06bb9 s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents: 165
diff changeset
2355 In mmh, the functionality should be included because it
f102dcc06bb9 s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents: 165
diff changeset
2356 is a part of modern email and likely wanted by users of mmh.
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2357 A fresh mmh installation should support signing and encrypting
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2358 out-of-the-box.
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2359 Therefore, Neil Rickert's
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2360 .Pn mhsign
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2361 and
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2362 .Pn mhpgp
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2363 scripts
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2364 .[
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2365 neil rickert mhsign mhpgp
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2366 .]
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2367 were included into mmh
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2368 .Ci f45cdc98117a84f071759462c7ae212f4bc5ab2e
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2369 .Ci 58cf09aa36e9f7f352a127158bbf1c5678bc6ed8 .
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2370 The scripts fit well because they are lightweight and
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2371 similar of style to the existing tools.
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2372 Additionally, no licensing difficulties appeared,
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2373 as they are part of the public domain.
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2374 .P
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2375 .Pn mhsign
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2376 handles the signing and encrypting part.
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2377 It comprises about 250 lines of shell code and interfaces between
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2378 .Pn gnupg
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2379 and
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2380 the MH system.
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2381 It was meant to be invoked manually at the WhatNow prompt, but in mmh,
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2382 .Pn send
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2383 invokes
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2384 .pn mhsign
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2385 automatically
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2386 .Ci c7b5e1df086bcc37ff40163ee67571f076cf6683 .
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2387 Special header fields were introduced to request this action.
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2388 If a draft contains the
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2389 .Hd Sign
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2390 header field,
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2391 .Pn send
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2392 will initiate the signing.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2393 The signing key is either chosen automatically or specified by the
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2394 .Pe Pgpkey
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2395 profile entry.
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2396 .Pn send
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2397 always create signatures using the PGP/MIME standard, \" REF XXX
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2398 but by manually invoking
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2399 .Pn mhsign ,
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2400 old-style non-MIME signatures can be created as well.
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2401 To encrypt an outgoing message, the draft needs to contain an
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2402 .Hd Enc
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2403 header field.
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2404 Public keys of all recipients are searched for in the gnupg keyring and
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2405 in a file called
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2406 .Fn pgpkeys ,
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2407 which contains exceptions and overrides.
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2408 Unless public keys are found for all recipients,
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2409 .Pn mhsign
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2410 will refuse to encrypt it.
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2411 Currently, messages with hidden (BCC) recipients can not be encrypted.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2412 This work is pending because it requires a structurally more complex
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2413 approach.
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2414 .P
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2415 .Pn mhpgp
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2416 is the companion to
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2417 .Pn mhsign .
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2418 It verifies signatures and decrypts messages.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2419 Encrypted messages can either be temporarily decrypted for display
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2420 or permanently decrypted and stored into the current folder.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2421 Currently,
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2422 .Pn mhpgp
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2423 needs to be invoked manually.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2424 The integration into
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2425 .Pn show
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2426 and
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2427 .Pn mhstore
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2428 to verify signatures and decrypt messages as needs
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2429 is planned but not realized yet.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2430 .P
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2431 Both scripts were written for nmh, hence they needed to be adjust
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2432 according to the differences between nmh and mmh.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2433 For instance, they use the backup prefix no longer.
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
2434 Furthermore, compatibility support for old PGP features was dropped.
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2435 .P
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2436 The integrated message signing and encrypting support is one of the
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2437 most recent features in mmh.
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2438 It has not yet had the time to mature.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2439 User feedback and personal experience need to be accumulated to
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2440 direct the further development of the facility.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2441 Although the feedback and experience is still missing,
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2442 it seems to be worthwhile to consider adding
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2443 .Sw -[no]sign
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2444 and
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2445 .Sw -[no]enc
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2446 switches to
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2447 .Pn send ,
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2448 to be able to override the corresponding header fields.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2449 A profile entry:
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2450 .VS
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2451 send: -sign
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2452 VE
177
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2453 would then activate signing for all outgoing messages.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2454 With the present approach, a
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2455 .Hd Send
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2456 header component needs to be added to each draft template
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2457 to achieve the same result.
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2458 Adding the switches would ease the work greatly and keep the
3d7db5c7965d Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents: 173
diff changeset
2459 template files clean.
157
0cce17978f0a Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents: 155
diff changeset
2460
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
2461
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
2462
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
2463
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2464 .H2 "Draft and Trash Folder
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2465 .P
14
55ec590cfa07 Wrote about the draft folder.
markus schnalke <meillo@marmaro.de>
parents: 12
diff changeset
2466
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2467 .U3 "Draft Folder
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
2468 .Id draft-folder
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2469 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2470 In the beginning, MH had the concept of a draft message.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2471 This is the file
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2472 .Fn draft
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2473 in the MH directory, which is treated special.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2474 On composing a message, this draft file was used.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2475 When starting to compose another message before the former one was sent,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2476 the user had to decide among:
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2477 .LI 1
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2478 Using the old draft to finish and send it before starting with a new one.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2479 .LI 2
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2480 Discarding the old draft and replacing it with a new one.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2481 .LI 3
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2482 Preserving the old draft by refiling it to a folder.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2483 .LP
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2484 It was only possible to work in alternation on multiple drafts.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2485 Therefore, the current draft needed to be refiled to a folder and
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2486 another one re-used for editing.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2487 Working on multiple drafts at the same time was impossible.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2488 The usual approach of switching to a different MH context did not
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2489 help anything.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2490 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2491 The draft folder facility exists to
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2492 allow true parallel editing of drafts, in a straight forward way.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2493 It was introduced by Marshall T. Rose, already in 1984.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2494 Similar to other new features, the draft folder was inactive by default.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2495 Even in nmh, the highly useful draft folder was not available
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2496 out-of-the-box.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2497 At least, Richard Coleman added the man page
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2498 .Mp mh-draft (5)
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2499 to better document the feature.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2500 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2501 Not using the draft folder facility has the single advantage of having
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2502 the draft file at a static location.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2503 This is simple in simple cases but the concept does not scale for more
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2504 complex cases.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2505 The concept of the draft message is too limited for the problem.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2506 Therefore the draft folder was introduced.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2507 It is the more powerful and more natural concept.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2508 The draft folder is a folder like any other folder in MH.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2509 Its messages can be listed like any other messages.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2510 A draft message is no longer a special case.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2511 Tools do not need special switches to work on the draft message.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2512 Hence corner cases were removed.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2513 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2514 The trivial part of the work was activating the draft folder with a
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2515 default name.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2516 I chose the name
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2517 .Fn +drafts
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2518 for obvious reasons.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2519 In consequence, the command line switches
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2520 .Sw -draftfolder
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2521 and
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2522 .Sw -draftmessage
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2523 could be removed.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2524 More difficult but also more improving was updating the tools to the
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2525 new concept.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2526 For nearly three decades, the tools needed to support two draft handling
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2527 approaches.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2528 By fully switching to the draft folder, the tools could be simplified
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2529 by dropping the awkward draft message handling code.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2530 .Sw -draft
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2531 switches were removed because operating on a draft message is no longer
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2532 special.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2533 It became indistinguishable to operating on any other message.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2534 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2535 .P
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2536 There is no more need to query the user for draft handling
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2537 .Ci 2d48b455c303a807041c35e4248955f8bec59eeb .
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2538 It is always possible to add another new draft.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2539 Refiling drafts is without difference to refiling other messages.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2540 All of these special cases are gone.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2541 Yet, one draft-related switch remained.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2542 .Pn comp
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2543 still has
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2544 .Sw -[no]use
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2545 for switching between two modes:
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2546 .LI 1
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2547 .Sw -use
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2548 to modify an existing draft.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2549 .LI 2
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2550 .Sw -nouse
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2551 to compose a new draft, possibly taking some existing message as template.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2552 .LP
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2553 In either case, the behavior of
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2554 .Pn comp
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2555 is deterministic.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2556 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2557 .Pn send
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2558 now operates on the current message in the draft folder by default.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2559 As message and folder can both be overridden by specifying them on
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2560 the command line, it is possible to send any message in the mail storage
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2561 by simply specifying its number and folder.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2562 In contrast to the other tools,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2563 .Pn send
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2564 takes the draft folder as its default folder.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2565 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2566 Dropping the draft message concept in favor for the draft folder concept,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2567 removed special cases with regular cases.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2568 This simplified the source code of the tools, as well as the concepts.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2569 In mmh, draft management does not break with the MH concepts
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2570 but applies them.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2571 .Cl "scan +drafts" ,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2572 for instance, is a truly natural request.
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
2573 Most of the work was already performed by Rose in the eighties.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2574 The original improvement of mmh is dropping the old draft message approach
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2575 and thus simplifying the tools, the documentation and the system as a whole.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2576 Although my part in the draft handling improvement was small,
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2577 it was an important one.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2578
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2579
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2580 .U3 "Trash Folder
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
2581 .Id trash-folder
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2582 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2583 Similar to the situation for drafts is the situation for removed messages.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2584 Historically, a message was ``deleted'' by prepending a specific
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
2585 \fIbackup prefix\fP, usually the comma character,
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
2586 to the file name.
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2587 The specific file would then be ignored by MH because only files with
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2588 names consisting of digits only are treated as messages.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2589 Although files remained in the file system,
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2590 the messages were no longer visible in MH.
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2591 To truly delete them, a maintenance job was needed.
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2592 Usually a cron job was installed to delete them after a grace time.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2593 For instance:
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2594 .VS
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2595 find $HOME/Mail -type f -name ',*' -ctime +7 -delete
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2596 VE
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2597 In such a setup, the original message could be restored
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2598 within the grace time interval by stripping the
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2599 backup prefix from the file name.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2600 But the user could not rely on this statement.
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2601 If the last message of a folder with six messages (\fL1-6\fP) was removed,
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2602 message
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2603 .Fn 6 ,
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2604 became file
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2605 .Fn ,6 .
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2606 If then a new message entered the same folder, it would be named with
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2607 the number one above the highest existing message number.
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2608 In this case the message would be named
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2609 .Fn 6
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2610 then.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2611 If this new message would be removed as well,
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2612 then the backup of the former message is overwritten.
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2613 Hence, the ability to restore removed messages did not only depend on
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
2614 the sweeping cron job but also on the removing of further messages.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2615 It is undesirable to have such obscure and complex mechanisms.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2616 The user should be given a small set of clear assertions, such as
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2617 ``Removed files are restorable within a seven-day grace time.''
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2618 With the addition ``... unless a message with the same name in the
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2619 same folder is removed before.'' the statement becomes complex.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2620 A user will hardly be able to keep track of any removal to know
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2621 if the assertion still holds true for a specific file.
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2622 In practice, the real mechanism is unclear to the user.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2623 The consequences of further removals are not obvious.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2624 .P
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
2625 Furthermore, the backup files are scattered within the whole mail storage.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2626 This complicates managing them.
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2627 It is possible with the help of
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2628 .Pn find ,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2629 but everything would be more convenient
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2630 if the deleted messages would be collected in one place.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2631 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2632 The profile entry
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2633 .Pe rmmproc
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2634 (previously named
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2635 .Pe Delete-Prog )
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2636 was introduced very early to improve the situation.
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2637 It could be set to any command, which would be executed to remove
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2638 the specified messages.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2639 This would override the default action described above.
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2640 Refiling the to-be-removed files to a trash folder is the usual example.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2641 Nmh's man page
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2642 .Mp rmm (1)
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2643 proposes to set the
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2644 .Pe rmmproc
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2645 to
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2646 .Cl "refile +d
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2647 to move messages to the trash folder,
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2648 .Fn +d ,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2649 instead of renaming them with the backup prefix.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2650 The man page proposes additionally the expunge command
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2651 .Cl "rm `mhpath +d all`
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2652 to empty the trash folder.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2653 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2654 Removing messages in such a way has advantages.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2655 The mail storage is prevented from being cluttered with removed messages
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2656 because they are all collected in one place.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2657 Existing and removed messages are thus separated more strictly.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2658 No backup files are silently overwritten.
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2659 But most important is the ability to keep removed messages in the MH domain.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2660 Messages in the trash folder can be listed like those in any other folder.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2661 Deleted messages can be displayed like any other messages.
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
2662 .Pn refile
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
2663 can restore deleted messages.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2664 All operations on deleted files are still covered by the MH tools.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2665 The trash folder is just like any other folder in the mail storage.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2666 .P
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2667 Similar to the draft folder case, I dropped the old backup prefix approach
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2668 in favor for replacing it by the better suiting trash folder system.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2669 Hence,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2670 .Pn rmm
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2671 calls
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2672 .Pn refile
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2673 to move the to-be-removed message to the trash folder,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2674 .Fn +trash
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2675 by default.
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2676 To sweep it clean, the user can use
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2677 .Cl "rmm -unlink +trash a" ,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2678 where the
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2679 .Sw -unlink
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2680 switch causes the files to be unlinked.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2681 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2682 .Ci ca0b3e830b86700d9e5e31b1784de2bdcaf58fc5
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2683 .P
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2684 Dropping the legacy approach and converting to the new approach completely
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2685 simplified the code base.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2686 The relationship between
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2687 .Pn rmm
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2688 and
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2689 .Pn refile
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2690 was inverted.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2691 In mmh,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2692 .Pn rmm
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2693 invokes
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2694 .Pn refile ,
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2695 which used to be the other way round.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2696 Yet, the relationship is simpler now.
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2697 Loops, like described in nmh's man page for
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2698 .Mp refile (1),
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
2699 can no longer occur:
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2700 .QS
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2701 Since
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2702 .Pn refile
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2703 uses your
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2704 .Pe rmmproc
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2705 to delete the message, the
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2706 .Pe rmmproc
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2707 must NOT call
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2708 .Pn refile
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2709 without specifying
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2710 .Sw -normmproc
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2711 or you will create an infinite loop.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2712 .QE
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2713 .LP
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2714 .Pn rmm
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2715 either unlinks a message with
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2716 .Fu unlink()
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2717 or invokes
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2718 .Pn refile
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2719 to move it to the trash folder.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2720 .Pn refile
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2721 does not invoke any tools.
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2722 .P
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2723 By generalizing the message removal in the way that it became covered
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2724 by the MH concepts made the whole system more powerful.
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2725
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2726
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2727
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2728
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2729
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2730 .H2 "Modern Defaults
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2731 .P
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2732 Nmh has a bunch of convenience-improving features inactive by default,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2733 although one can expect every new user wanting to have them active.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2734 The reason they are inactive by default is the wish to stay compatible
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2735 with old versions.
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2736 But what is the definition for old versions?
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2737 Still, the highly useful draft folder facility has not been activated
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2738 by default although it was introduced over twenty-five years ago.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2739 .[
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2740 rose romine real work
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2741 .]
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2742 The community seems not to care.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2743 This is one of several examples that require new users to first build up
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2744 a profile before they can access the modern features of nmh.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2745 Without an extensive profile, the setup is hardly usable
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2746 for modern emailing.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2747 The point is not the customization of the setup,
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2748 but the need to activate generally useful facilities.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2749 .P
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2750 Yet, the real problem lies less in enabling the features, as this is
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2751 straight forward as soon as one knows what he wants.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2752 The real problem is that new users need deep insight into the project
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2753 to find out about inactive features nmh already provides.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2754 To give an example, I needed one year of using nmh
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2755 before I became aware of the existence of the attachment system.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2756 One could argue that this fact disqualifies my reading of the
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2757 documentation.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2758 If I would have installed nmh from source back then, I could agree.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2759 Yet, I had used a prepackaged version and had expected that it would
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2760 just work.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2761 Nevertheless, I had been convinced by the concepts of MH already
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2762 and I am a software developer,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2763 still I required a lot of time to discover the cool features.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2764 How can we expect users to be even more advanced than me,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2765 just to allow them use MH in a convenient and modern way?
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2766 Unless they are strongly convinced of the concepts, they will fail.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2767 I have seen friends of me giving up disappointed
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2768 before they truly used the system,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2769 although they had been motivated in the beginning.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
2770 They suffer hard enough to get used to the tool chest approach,
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
2771 we developers should spare them further inconveniences.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2772 .P
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2773 Maintaining compatibility for its own sake is bad,
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2774 because the code base collects more and more compatibility code.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2775 Sticking to the compatiblity code means remaining limited;
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2776 whereas adjusting to the changes renders the compatibility unnecessary.
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2777 Keeping unused alternatives in the code is a bad choice as they likely
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2778 gather bugs, by not being well tested.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2779 Also, the increased code size and the greater number of conditions
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2780 increase the maintenance costs.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2781 If any MH implementation would be the back-end of widespread
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2782 email clients with large user bases, compatibility would be more
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2783 important.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2784 Yet, it appears as if this is not the case.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2785 Hence, compatibility is hardly important for technical reasons.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2786 Its importance originates rather from personal reasons.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2787 Nmh's user base is small and old.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2788 Changing the interfaces would cause inconvenience to long-term users of MH.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2789 It would force them to change their many years old MH configurations.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2790 I do understand this aspect, but by sticking to the old users,
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2791 new users are kept away.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2792 Yet, the future lies in new users.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2793 In consequence, mmh invites new users by providing a convenient
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2794 and modern setup, readily usable out-of-the-box.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2795 .P
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2796 In mmh, all modern features are active by default and many previous
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2797 approaches are removed or only accessible in manual ways.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2798 New default features include:
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2799 .BU
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2800 The attachment system (\c
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2801 .Hd Attach ).
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2802 .Ci 8ff284ff9167eff8f5349481529332d59ed913b1
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2803 .BU
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2804 The draft folder facility (\c
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2805 .Fn +drafts ).
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2806 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2807 .BU
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2808 The unseen sequence (`u')
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2809 .Ci c2360569e1d8d3678e294eb7c1354cb8bf7501c1
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2810 and the sequence negation prefix (`!').
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2811 .Ci db74c2bd004b2dc9bf8086a6d8bf773ac051f3cc
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2812 .BU
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2813 Quoting the original message in the reply.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2814 .Ci 67411b1f95d6ec987b4c732459e1ba8a8ac192c6
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2815 .BU
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2816 Forwarding messages using MIME.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2817 .Ci 6e271608b7b9c23771523f88d23a4d3593010cf1
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
2818 .LP
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2819 In consequence, a setup with a profile that defines only the path to the
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2820 mail storage, is already convenient to use.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2821 Again, Paul Vixie's ``edginess'' call supports the direction I took:
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2822 ``the `main branch' should just be modern''.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2823 .[
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2824 paul vixie edginess nmh-workers
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2825 .]
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2826
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2827
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2828
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2829
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2830
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2831 .\" --------------------------------------------------------------
131
7c741bc8f719 Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents: 130
diff changeset
2832 .H1 "Styling
16
81f703140554 Wrote about the trash folder.
markus schnalke <meillo@marmaro.de>
parents: 14
diff changeset
2833 .P
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2834 Kernighan and Pike have emphasized the importance of style in the
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2835 preface of their book:
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2836 .[ [
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2837 kernighan pike practice of programming
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2838 .], p. x]
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2839 .QS
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2840 Chapter 1 discusses programming style.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2841 Good style is so important to good programming that we have chose
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2842 to cover it first.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2843 .QE
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2844 This section covers changes in mmh that were guided by the desire
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2845 to improve on style.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2846 Many of them follow the rules given in the quoted book.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2847 .[
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2848 kernighan pike practice of programming
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2849 .]
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2850
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2851
127
4a9a97d9d6b5 Exchanged the section titles `Style' and `Code Style'.
markus schnalke <meillo@marmaro.de>
parents: 126
diff changeset
2852
4a9a97d9d6b5 Exchanged the section titles `Style' and `Code Style'.
markus schnalke <meillo@marmaro.de>
parents: 126
diff changeset
2853
4a9a97d9d6b5 Exchanged the section titles `Style' and `Code Style'.
markus schnalke <meillo@marmaro.de>
parents: 126
diff changeset
2854 .H2 "Code Style
154
63e885fb48ba Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents: 145
diff changeset
2855 .Id code-style
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2856 .P
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2857 .U3 "Indentation Style
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2858 .P
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2859 Indentation styles are the holy cow of programmers.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2860 Kernighan and Pike
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2861 .[ [
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2862 kernighan pike practice of programming
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2863 .], p. 10]
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
2864 wrote:
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2865 .QS
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2866 Programmers have always argued about the layout of programs,
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2867 but the specific style is much less important than its consistent
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2868 application.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
2869 Pick one style, preferably ours, use it consistently, and don't waste
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2870 time arguing.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2871 .QE
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2872 .P
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2873 I agree that the constant application is most important,
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2874 but I believe that some styles have advantages over others.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2875 For instance the indentation with tab characters only.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2876 Tab characters directly map to the nesting level \(en
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2877 one tab, one level.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2878 Tab characters are flexible because developers can adjust them to
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2879 whatever width they like to have.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2880 There is no more need to run
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2881 .Pn unexpand
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2882 or
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2883 .Pn entab
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2884 programs to ensure the correct mixture of leading tabs and spaces.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2885 The simple rules are: (1) Leading whitespace must consist of tabs only.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2886 (2) Any other whitespace should consist of spaces.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
2887 These two rules ensure the integrity of the visual appearance.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
2888 Although reformatting existing code should be avoided, I did it.
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2889 I did not waste time arguing; I just reformated the code.
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2890 .Ci a485ed478abbd599d8c9aab48934e7a26733ecb1
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2891
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2892 .U3 "Comments
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2893 .P
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2894 Section 1.6 of
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2895 .[ [
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2896 kernighan pike practice of programming
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2897 .], p. 23]
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2898 demands: ``Don't belabor the obvious.''
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
2899 Hence, I simply removed all the comments in the following code excerpt:
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2900 .VS
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2901 context_replace(curfolder, folder); /* update current folder */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2902 seq_setcur(mp, mp->lowsel); /* update current message */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2903 seq_save(mp); /* synchronize message sequences */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2904 folder_free(mp); /* free folder/message structure */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2905 context_save(); /* save the context file */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2906
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2907 [...]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2908
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2909 int c; /* current character */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2910 char *cp; /* miscellaneous character pointer */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2911
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2912 [...]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2913
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2914 /* NUL-terminate the field */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2915 *cp = '\0';
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2916 VE
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
2917 .Ci 426543622b377fc5d091455cba685e114b6df674
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2918 .P
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2919 The program code explains enough itself, already.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2920
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2921
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2922 .U3 "Names
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2923 .P
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2924 Kernighan and Pike suggest:
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2925 ``Use active names for functions''.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2926 .[ [
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2927 kernighan pike practice of programming
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2928 .], p. 4]
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2929 One application of this rule was the rename of
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2930 .Fu check_charset()
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2931 to
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2932 .Fu is_native_charset() .
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2933 .Ci 8d77b48284c58c135a6b2787e721597346ab056d
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
2934 The same change fixed a violation of ``Be accurate''
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
2935 .[ [
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
2936 kernighan pike practice of programming
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
2937 .], p. 4]
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
2938 as well.
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2939 The code did not match the expectation the function suggested,
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2940 as it, for whatever reason, only compared the first ten characters
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2941 of the charset name.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2942 .P
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2943 More important than using active names is using descriptive names.
145
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
2944 .VS
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
2945 m_unknown(in); /* the MAGIC invocation... */
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
2946 VE
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
2947 Renaming the obscure
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2948 .Fu m_unknown()
145
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
2949 function was a delightful event, although it made the code less funny.
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2950 .Ci 611d68d19204d7cbf5bd585391249cb5bafca846
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2951 .P
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2952 Magic numbers are generally considered bad style.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2953 Obviously, Kernighan and Pike agree:
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2954 ``Give names to magic numbers''.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2955 .[ [
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2956 kernighan pike practice of programming
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2957 .], p. 19]
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2958 One such change was naming the type of input \(en mbox or mail folder \(en
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2959 to be scanned:
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2960 .VS
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2961 #define SCN_MBOX (-1)
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2962 #define SCN_FOLD 0
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2963 VE
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2964 .Ci 7ffb36d28e517a6f3a10272056fc127592ab1c19
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2965 .P
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2966 The argument
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2967 .Ar outnum
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2968 of the function
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2969 .Fu scan()
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2970 in
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2971 .Fn uip/scansbr.c
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2972 defines the number of the message to be created.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2973 If no message is to be created, the argument is misused to transport
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2974 program logic.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2975 This lead to obscure code.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2976 I improved the clarity of the code by introducing two variables:
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2977 .VS
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2978 int incing = (outnum > 0);
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2979 int ismbox = (outnum != 0);
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2980 VE
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2981 They cover the magic values and are used for conditions.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2982 The variable
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2983 .Ar outnum
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2984 is only used when it holds an ordinary message number.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2985 .Ci b8b075c77be7794f3ae9ff0e8cedb12b48fd139f
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2986 The clarity improvement of the change showed detours in the program logic
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2987 of related code parts.
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2988 Having the new variables with descriptive names, a more
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
2989 straight forward implementation became apparent.
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
2990 Before the code was clarified, the possibility to improve had not be seen.
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2991 .Ci aa60b0ab5e804f8befa890c0a6df0e3143ce0723
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
2992
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2993
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2994
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2995 .H2 "Structural Rework
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
2996 .P
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2997 Although the stylistic changes described up to here improve the
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2998 readability of the source code, all of them are changes ``in the small''.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
2999 Structural changes affect a much larger area.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
3000 They are more difficult to do but lead to larger improvements,
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
3001 especially as they influence the outer shape of the tools as well.
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3002 .P
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3003 At the end of their chapter on style,
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3004 Kernighan and Pike ask: ``But why worry about style?''
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
3005 .[ [
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
3006 kernighan pike practice of programming
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
3007 .], p. 28]
136
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
3008 Following are two examples of structural rework that show
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
3009 why style is important in the first place.
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
3010
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
3011
470d5db0c06c Minor rework.
markus schnalke <meillo@marmaro.de>
parents: 134
diff changeset
3012 .U3 "Rework of \f(CWanno\fP
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3013 .P
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3014 Until 2002,
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3015 .Pn anno
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3016 had six functional command line switches,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3017 .Sw -component
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3018 and
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3019 .Sw -text ,
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
3020 which have an argument each,
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3021 and the two pairs of flags,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3022 .Sw -[no]date
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3023 and
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3024 .Sw -[no]inplace .
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3025 Then Jon Steinhart introduced his attachment system.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3026 In need for more advanced annotation handling, he extended
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3027 .Pn anno .
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3028 He added five more switches:
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3029 .Sw -draft ,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3030 .Sw -list ,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3031 .Sw -delete ,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3032 .Sw -append ,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3033 and
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3034 .Sw -number ,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3035 the last one taking an argument.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3036 .Ci 7480dbc14bc90f2d872d434205c0784704213252
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3037 Later,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3038 .Sw -[no]preserve
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3039 was added.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3040 .Ci d9b1d57351d104d7ec1a5621f090657dcce8cb7f
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3041 Then, the Synopsis section of the man page
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3042 .Mp anno (1)
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3043 read:
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3044 .VS
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3045 anno [+folder] [msgs] [-component field] [-inplace | -noinplace]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3046 [-date | -nodate] [-draft] [-append] [-list] [-delete]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3047 [-number [num|all]] [-preserve | -nopreserve] [-version]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3048 [-help] [-text body]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3049 VE
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3050 .LP
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3051 The implementation followed the same structure.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3052 Problems became visible when
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3053 .Cl "anno -list -number 42
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3054 worked on the current message instead on message number 42,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3055 and
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3056 .Cl "anno -list -number l:5
124
3d30fd938aa9 Spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 123
diff changeset
3057 did not work on the last five messages but failed with the mysterious
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3058 error message: ``anno: missing argument to -list''.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3059 Yet, the invocation matched the specification in the man page.
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3060 There, the correct use of
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3061 .Sw -number
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3062 was defined as being
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3063 .Cl "[-number [num|all]]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3064 and the textual description for the combination with
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3065 .Sw -list
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3066 read:
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3067 .QS
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3068 The
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3069 .Sw -list
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3070 option produces a listing of the field bodies for
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3071 header fields with names matching the specified component,
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3072 one per line. The listing is numbered, starting at 1, if the
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3073 .Sw -number
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3074 option is also used.
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3075 .QE
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3076 .LP
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3077 The problem was manifold.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3078 The code required a numeric argument to the
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3079 .Sw -number
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3080 switch.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3081 If it was missing or non-numeric,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3082 .Pn anno
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3083 aborted with an error message that had an off-by-one error,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3084 printing the switch one before the failing one.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3085 Semantically, the argument to the
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3086 .Sw -number
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3087 switch is only necessary in combination with
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3088 .Sw -delete ,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3089 but not with
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3090 .Sw -list .
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3091 .P
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3092 Trying to fix these problems on the surface would not have solved
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3093 them truly, as they originate from a discrepance between the
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3094 structure of the problem and the structure implemented in the program.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3095 Such structural differences can not be cured on the surface.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3096 They need to be solved by adjusting the structure of the implementation
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3097 to the structure of the problem.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3098 .P
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3099 In 2002, the new switches
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3100 .Sw -list
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3101 and
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3102 .Sw -delete
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3103 were added in the same way, the
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3104 .Sw -number
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3105 switch for instance had been added.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3106 Yet, they are of structural different type.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3107 Semantically,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3108 .Sw -list
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3109 and
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3110 .Sw -delete
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3111 introduce modes of operation.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3112 Historically,
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3113 .Pn anno
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3114 had only one operation mode: adding header fields.
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3115 With the extension it got two more modes:
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3116 .\" XXX got
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3117 listing and deleting header fields.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3118 The structure of the code changes did not pay respect to this
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3119 fundamental change to
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3120 .Pn anno 's
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3121 behavior.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3122 Neither the implementation nor the documentation did clearly
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3123 define them as being exclusive modes of operation.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3124 Having identified the problem, I solved it by putting structure into
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3125 .Pn anno
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3126 and its documentation.
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3127 .Ci d54c8db8bdf01e8381890f7729bc0ef4a055ea11
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3128 .P
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3129 The difference is visible in both the code and the documentation.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3130 The following code excerpt:
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3131 .VS
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3132 int delete = -2; /* delete header element if set */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3133 int list = 0; /* list header elements if set */
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3134 [...]
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3135 case DELETESW: /* delete annotations */
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3136 delete = 0;
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3137 continue;
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3138 case LISTSW: /* produce a listing */
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3139 list = 1;
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3140 continue;
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3141 VE
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3142 .LP
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3143 was replaced by:
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3144 .VS
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3145 static enum { MODE_ADD, MODE_DEL, MODE_LIST } mode = MODE_ADD;
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3146 [...]
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3147 case DELETESW: /* delete annotations */
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3148 mode = MODE_DEL;
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3149 continue;
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3150 case LISTSW: /* produce a listing */
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3151 mode = MODE_LIST;
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3152 continue;
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3153 VE
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3154 .LP
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3155 The replacement code does not only reflect the problem's structure better,
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3156 it is easier to understand as well.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3157 The same applies to the documentation.
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3158 The man page was completely reorganized to propagate the same structure.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3159 This is visible in the Synopsis section:
120
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3160 .VS
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3161 anno [+folder] [msgs] [-component field] [-text body]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3162 [-append] [-date | -nodate] [-preserve | -nopreserve]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3163 [-Version] [-help]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3164
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3165 anno -delete [+folder] [msgs] [-component field] [-text
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3166 body] [-number num | all ] [-preserve | -nopreserve]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3167 [-Version] [-help]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3168
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3169 anno -list [+folder] [msgs] [-component field] [-number]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3170 [-Version] [-help]
e49780100ffb Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents: 118
diff changeset
3171 VE
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3172 .\" XXX think about explaining the -preserve rework?
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3173
16
81f703140554 Wrote about the trash folder.
markus schnalke <meillo@marmaro.de>
parents: 14
diff changeset
3174
0
dc2bfef4cda7 Initial commit: Basic structure, macros and fonts.
markus schnalke <meillo@marmaro.de>
parents:
diff changeset
3175
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3176 .U3 "Path Conversion
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3177 .P
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3178 Four kinds of path names can appear in MH:
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3179 .LI 1
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3180 Absolute Unix directory paths, like
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3181 .Fn /etc/passwd .
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3182 .LI 2
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3183 Relative Unix directory paths, like
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3184 .Fn ./foo/bar .
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3185 .LI 3
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3186 Absolute MH folder paths, like
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3187 .Fn +friends/phil .
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3188 .LI 4
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3189 Relative MH folder paths, like
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3190 .Fn @subfolder .
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3191 .LP
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3192 The last type, relative MH folder paths, are hardly documented.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3193 Nonetheless, they are useful for large mail storages.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3194 The current mail folder is specified as `\c
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3195 .Fn @ ',
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3196 just like the current directory is specified as `\c
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3197 .Fn . '.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3198 .P
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3199 To allow MH tools to understand all four notations,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3200 they need to convert between them.
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3201 .\" XXX between?
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3202 In nmh, these path name conversion functions were located in the files
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3203 .Fn sbr/path.c
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3204 (``return a pathname'') and
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3205 .Fn sbr/m_maildir.c
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3206 (``get the path for the mail directory'').
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3207 The seven functions in the two files were documented with no more
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3208 than two comments, which described obvious information.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3209 The function signatures were neither explaining:
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3210 .VS
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3211 char *path(char *, int);
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3212 char *pluspath(char *);
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3213 char *m_mailpath(char *);
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3214 char *m_maildir(char *);
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3215 VE
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3216 .P
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3217 My investigation provides the following description:
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3218 .LI 1
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3219 The second parameter of
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3220 .Fu path()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3221 defines the type of path given as first parameter.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3222 Directory paths are converted to absolute directory paths.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3223 Folder paths are converted to absolute folder paths.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3224 Folder paths must not include a leading `\fL@\fP' character.
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3225 Leading plus characters are preserved.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3226 The result is a pointer to newly allocated memory.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3227 .LI 2
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3228 .Fu pluspath()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3229 is a convenience-wrapper to
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3230 .Fu path() ,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3231 to convert folder paths only.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3232 This function can not be used for directory paths.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3233 An empty string parameter causes a buffer overflow.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3234 .LI 3
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3235 .Fu m_mailpath()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3236 converts directory paths to absolute directory paths.
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3237 The characters `\fL+\fP' or `\fL@\fP' at the beginning of the path name are
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3238 treated literal, i.e. as the first character of a relative directory path.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3239 Hence, this function can not be used for folder paths.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3240 In any case, the result is an absolute directory path.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3241 The result is a pointer to newly allocated memory.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3242 .LI 4
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3243 .Fu m_maildir()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3244 returns the parameter unchanged if it is an absolute directory path
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3245 or begins with the entry `\fL.\fP' or `\fL..\fP'.
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3246 All other strings are prepended with the current working directory.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3247 Hence, this functions can not be used for folder paths.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3248 The result is either an absolute directory path or a relative
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3249 directory path, starting with a dot.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3250 In contrast to the other functions, the result is a pointer to
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3251 static memory.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3252 .P
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3253 The situation was obscure, irritating, error-prone, and non-orthogonal.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3254 No clear terminology was used to name the different kinds of path names.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3255 The first argument of
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3256 .Fu m_mailpath() ,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3257 for instance, was named
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3258 .Ar folder ,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3259 though
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3260 .Fu m_mailpath()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3261 can not be used for MH folders.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3262 .P
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3263 I reworked the path name conversion completely, introducing clarity.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3264 First of all, the terminology needed to be defined.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3265 A path name is either in the Unix domain, then it is called
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3266 \fIdirectory path\fP, `dirpath' for short, or it is in the MH domain,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3267 then it is called \fIfolder path\fP, `folpath' for short.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3268 The two terms need to be used with strict distinction.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3269 Having a clear terminology is often an indicator of having understood
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3270 the problem itself.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3271 Second, I exploited the concept of path type indicators.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3272 By requesting every path name to start with a clear type identifier,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3273 conversion between the types can be fully automated.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3274 Thus the tools can accept paths of any type from the user.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3275 Therefore, it was necessary to require relative directory paths to be
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3276 prefixed with a dot character.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3277 In consequence, the dot character could no longer be an alias for the
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3278 current message.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3279 .Ci cff0e16925e7edbd25b8b9d6d4fbdf03e0e60c01
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3280 Third, I created three new functions to replace the previous mess:
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3281 .LI 1
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3282 .Fu expandfol()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3283 converts folder paths to absolute folder paths,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3284 without the leading plus character.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3285 Directory paths are simply passed through.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3286 This function is to be used for folder paths only, thus the name.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3287 The result is a pointer to static memory.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3288 .LI 2
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3289 .Fu expanddir()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3290 converts directory paths to absolute directory paths.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3291 Folder paths are treated as relative directory paths.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3292 This function is to be used for directory paths only, thus the name.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3293 The result is a pointer to static memory.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3294 .LI 3
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3295 .Fu toabsdir()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3296 converts any type of path to an absolute directory path.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3297 This is the function of choice for path conversion.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3298 Absolute directory paths are the most general representation of a
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3299 path name.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3300 The result is a pointer to static memory.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3301 .P
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3302 .\" XXX ueberfluessig?
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3303 The new functions have names that indicate their use.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3304 Two of the functions convert relative to absolute path names of the
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3305 same type.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3306 The third function converts any path name type to the most general one,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3307 the absolute directory path.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3308 All of the functions return pointers to static memory.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3309 All three functions are implemented in
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3310 .Fn sbr/path.c .
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3311 .Fn sbr/m_maildir.c
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3312 is removed.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
3313 .Ci d39e2c447b0d163a5a63f480b23d06edb7a73aa0
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3314 .P
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3315 Along with the path conversion rework, I also replaced
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3316 .Fu getfolder(FDEF)
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3317 with
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3318 .Fu getdeffol()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3319 and
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3320 .Fu getfolder(FCUR)
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3321 with
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3322 .Fu getcurfol() ,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3323 which is only a convenience wrapper for
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3324 .Fu expandfol("@") .
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3325 This code was moved from
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3326 .Fn sbr/getfolder.c
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3327 to
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3328 .Fn sbr/path.c .
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
3329 .Ci d39e2c447b0d163a5a63f480b23d06edb7a73aa0
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3330 .P
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3331 The related function
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3332 .Fu etcpath()
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3333 was moved to
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3334 .Fn sbr/path.c ,
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
3335 too
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
3336 .Ci b4c29794c12099556151d93a860ee51badae2e35 .
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3337 Previously, it had been located in
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3338 .Fn config/config.c ,
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3339 for whatever reasons.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3340 .P
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3341 .Fn sbr/path.c
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3342 now contains all path handling code.
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3343 .\" XXX naechste zeile weg?
134
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3344 Only 173 lines of code were needed to replace the previous 252 lines.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3345 The readability of the code is highly improved.
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3346 Additionally, each of the six exported and one static functions
edf46861132b Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents: 133
diff changeset
3347 is introduced by an explaining comment.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3348
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3349
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3350
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3351
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3352 .H2 "Profile Reading
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3353 .P
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3354 The MH profile contains the configuration for the user-specific MH setup.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3355 MH tools read the profile right after starting up,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3356 as it contains the location of the user's mail storage
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3357 and similar settings that influence the whole setup.
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
3358 Furthermore, the profile contains the default switches for the tools,
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3359 hence, it must be read before the command line switches are processed.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3360 .P
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3361 For historic reasons, some MH tools did not read the profile and context.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3362 Among them were
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3363 .Pn post /\c
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3364 .Pn spost ,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3365 .Pn mhmail ,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3366 and
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3367 .Pn slocal .
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3368 The reason why these tools ignored the profile were not clearly stated.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3369 During the discussion on the nmh-workers mailing list,
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
3370 David Levine posted an explanation, quoting John Romine:
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3371 .[
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3372 nmh-workers levine post profile
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3373 .]
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3374 .QS
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3375 I asked John Romine and here's what he had to say, which
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3376 agrees and provides an example that convinces me:
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3377 .QS
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3378 My take on this is that
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3379 .Pn post
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3380 should not be called by users directly, and it doesn't read the
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3381 .Fn .mh_profile
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3382 (only front-end UI programs read the profile).
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3383 .QP
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3384 For example, there can be contexts where
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3385 .Pn post
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3386 is called by a helper program (like `\c
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3387 .Pn mhmail ')
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3388 which may be run by a non-MH user.
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3389 We don't want this to prompt the user to create an MH profile, etc.
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3390 .QP
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3391 My suggestion would be to have
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3392 .Pn send
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3393 pass a (hidden) `\c
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3394 .Sw -fileproc
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3395 .Ar proc '
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3396 option to
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3397 .Pn post
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3398 if needed.
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3399 You could also
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3400 use an environment variable (I think
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3401 .Pn send /\c
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3402 .Pn whatnow
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3403 do this).
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3404 .QE
164
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3405 I think that's the way to go.
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3406 My personal preference is to use a command line option,
5c01017be420 Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents: 159
diff changeset
3407 not an environment variable.
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3408 .QE
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3409 .P
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3410 To solve the problem of
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3411 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3412 not honoring the
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3413 .Pe fileproc
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3414 profile entry,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3415 the community roughly agreed that a switch
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3416 .Sw -fileproc
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3417 should be added to
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3418 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3419 to be able to pass a different fileproc.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3420 I strongly disagree with this approach because it does not solve
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3421 the problem; it only removes a single symptom.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3422 The problem is that
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3423 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3424 does not behave as expected.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3425 But all programs should behave as expected.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3426 Clear and simple concepts are a precondition for this.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3427 Hence, the real solution is having all MH tools read the profile.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3428 .P
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3429 The problem has a further aspect.
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3430 It mainly originates in
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3431 .Pn mhmail .
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3432 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3433 was intended to be a replacement for
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3434 .Pn mailx
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3435 on systems with MH installations.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3436 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3437 should have been able to use just like
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3438 .Pn mailx ,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3439 but sending the message via MH's
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3440 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3441 instead of
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3442 .Pn sendmail .
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3443 Using
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3444 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3445 should not be influenced by the question whether the user had
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3446 MH set up for himself or not.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3447 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3448 did not read the profile as this requests the user to set up MH
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3449 if not done yet.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3450 As
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3451 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3452 used
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3453 .Pn post ,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3454 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3455 could not read the profile neither.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3456 This is the reason why
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3457 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3458 does not read the profile.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3459 This is the reason for the actual problem.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3460 It was not much of a problem because
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3461 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3462 was not intended to be used by users directly.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3463 .Pn send
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3464 is the interactive front-end to
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3465 .Pn post .
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3466 .Pn send
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3467 read the profile and passed all relevant values on the command line to
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3468 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3469 \(en an awkward solution.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3470 .P
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3471 The important insight is that
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3472 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3473 is no true MH tool.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3474 The concepts broke because this outlandish tool was treated as any other
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3475 MH tool.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3476 Instead it should have been treated accordingly to its foreign style.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3477 The solution is not to prevent the tools reading the profile but
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3478 to instruct them reading a different profile.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3479 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3480 could have set up a well-defined profile and caused all MH tools
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3481 in the session to use it by exporting an environment variable.
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3482 With this approach, no special cases would have been introduced,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3483 no surprises would have been caused.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3484 By writing a clean-profile-wrapper, the concept could have been
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3485 generalized orthogonally to the whole MH tool chest.
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3486 Then Rose's motivation behind the decision that
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3487 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3488 ignores the profile, as quoted by Jeffrey Honig,
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
3489 would have become possible:
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3490 .[
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3491 nmh-workers post profile
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3492 .]
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3493 .QS
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3494 when you run mh commands in a script, you want all the defaults to be
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3495 what the man page says.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3496 when you run a command by hand, then you want your own defaults...
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3497 .QE
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3498 .LP
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3499 Yet, I consider this explanation shortsighted.
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3500 We should rather regard theses two cases as just two different MH setups,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3501 based on two different profiles.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3502 Mapping such problems on the concepts of switching between different
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3503 profiles, solves them once for all.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3504 .P
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3505 In mmh, the wish to have
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3506 .Pn mhmail
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3507 as a replacement for
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3508 .Pn mailx
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3509 is considered obsolete.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3510 Mmh's
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3511 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3512 does no longer cover this use-case.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3513 Currently,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3514 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3515 is in a transition state.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3516 .Ci 32d4f9daaa70519be3072479232ff7be0500d009
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3517 It may become a front-end to
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3518 .Pn comp ,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3519 which provides an interface more convenient in some cases.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3520 In this case,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3521 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3522 will become an ordinary MH tool, reading the profile.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3523 If, however, this idea will not convince, then
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3524 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3525 will be removed.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3526 .P
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3527 Every program in the mmh tool chest reads the profile.
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3528 The only exception is
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3529 .Pn slocal ,
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3530 which is not considered part of the mmh tool chest.
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3531 This MDA is only distributed with mmh, currently.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3532 Mmh has no
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3533 .Pn post
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3534 program, but
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3535 .Pn spost ,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3536 which now reads the profile.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3537 .Ci 3e017a7abbdf69bf0dff7a4073275961eda1ded8
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3538 With this change,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3539 .Pn send
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3540 and
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3541 .Pn spost
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3542 can be considered to be merged.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3543 .Pn spost
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
3544 is only invoked directly by the to-be-changed
138
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3545 .Pn mhmail
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3546 implementation and by
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3547 .Pn rcvdist ,
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3548 which will require rework.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3549 .P
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3550 The
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3551 .Fu context_foil()
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3552 function to pretend to have read an empty profile was removed.
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3553 .Ci 68af8da96bea87a5541988870130b6209ce396f6
cc35686f359e Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents: 136
diff changeset
3554 All mmh tools read the profile.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3555
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3556
127
4a9a97d9d6b5 Exchanged the section titles `Style' and `Code Style'.
markus schnalke <meillo@marmaro.de>
parents: 126
diff changeset
3557
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3558 .H2 "Standard Libraries
58
814c33b96d89 Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents: 51
diff changeset
3559 .P
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3560 MH is one decade older than the POSIX and ANSI C standards.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3561 Hence, MH included own implementations of functions
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3562 that are standardized and thus widely available today,
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3563 but were not back then.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3564 Today, twenty years after the POSIX and ANSI C were published,
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3565 developers can expect systems to comply with these standards.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3566 In consequence, MH-specific replacements for standard functions
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3567 can and should be dropped.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3568 Kernighan and Pike advise: ``Use standard libraries.''
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3569 .[ [
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3570 kernighan pike practice of programming
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3571 .], p. 196]
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3572 Actually, MH had followed this advice in history,
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3573 but it had not adjusted to the changes in this field.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3574 The
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3575 .Fu snprintf()
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3576 function, for instance, was standardized with C99 and is available
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3577 almost everywhere because of its high usefulness.
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3578 The project's own implementation of
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3579 .Fu snprintf()
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3580 was dropped in March 2012 in favor for using the one of the
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3581 standard library.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3582 .Ci 0052f1024deb0a0a2fc2e5bacf93d45a5a9c9b32
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3583 Such decisions limit the portability of mmh
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3584 if systems do not support these standardized and widespread functions.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3585 This compromise is made because mmh focuses on the future.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3586 .P
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3587 .\" XXX kuerzen und mit dem naechsten Absatz vereinen
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3588 I am still in my twenties and my C and Unix experience comprises
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3589 only half a dozen years.
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3590 Hence, I need to learn about the history in retrospective.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3591 I have not used those ancient constructs myself.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
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diff changeset
3592 I have not suffered from their incompatibilities.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
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diff changeset
3593 I have not longed for standardization.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
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diff changeset
3594 All my programming experience is from a time when ANSI C and POSIX
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diff changeset
3595 were well established already.
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
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diff changeset
3596 I have only read a lot of books about the (good) old times.
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
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diff changeset
3597 This puts me in a difficult position when working with old code.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3598 I need to freshly acquire knowledge about old code constructs and ancient
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3599 programming styles, whereas older programmers know these things by
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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diff changeset
3600 heart from their own experience.
121
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diff changeset
3601 .P
123
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markus schnalke <meillo@marmaro.de>
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diff changeset
3602 Being aware of the situation, I rather let people with more historic
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parents: 122
diff changeset
3603 experience replace ancient code constructs with standardized ones.
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3604 Lyndon Nerenberg covered large parts of this task for the nmh project.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3605 He converted project-specific functions to POSIX replacements,
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3606 also removing the conditionals compilation of now standardized features.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3607 Ken Hornstein and David Levine had their part in the work, too.
121
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parents: 120
diff changeset
3608 Often, I only needed to pull over changes from nmh into mmh.
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parents: 120
diff changeset
3609 These changes include many commits; these are among them:
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3610 .Ci 768b5edd9623b7238e12ec8dfc409b82a1ed9e2d
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3611 .Ci 0052f1024deb0a0a2fc2e5bacf93d45a5a9c9b32 .
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
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diff changeset
3612 .P
123
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diff changeset
3613 During my own work, I tidied up the \fIMH standard library\fP,
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markus schnalke <meillo@marmaro.de>
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3614 .Fn libmh.a ,
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diff changeset
3615 which is located in the
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diff changeset
3616 .Fn sbr
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markus schnalke <meillo@marmaro.de>
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3617 (``subroutines'') directory in the source tree.
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markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3618 The MH library includes functions that mmh tools usually need.
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diff changeset
3619 Among them are MH-specific functions for profile, context, sequence,
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parents: 122
diff changeset
3620 and folder handling, but as well
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3621 MH-independent functions, such as auxiliary string functions,
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markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3622 portability interfaces and error-checking wrappers for critical
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3623 functions of the standard library.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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diff changeset
3624 .P
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diff changeset
3625 I have replaced the
121
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markus schnalke <meillo@marmaro.de>
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diff changeset
3626 .Fu atooi()
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markus schnalke <meillo@marmaro.de>
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diff changeset
3627 function with calls to
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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diff changeset
3628 .Fu strtoul()
139
b7b81ae9c9d8 Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents: 138
diff changeset
3629 with the third parameter, the base, set to eight.
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3630 .Fu strtoul()
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3631 is part of C89 and thus considered safe to use.
121
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parents: 120
diff changeset
3632 .Ci c490c51b3c0f8871b6953bd0c74551404f840a74
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diff changeset
3633 .P
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diff changeset
3634 I did remove project-included fallback implementations of
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3635 .Fu memmove()
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markus schnalke <meillo@marmaro.de>
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diff changeset
3636 and
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markus schnalke <meillo@marmaro.de>
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diff changeset
3637 .Fu strerror() ,
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3638 although Peter Maydell had re-included them into nmh in 2008
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3639 to support SunOS 4.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3640 Nevertheless, these functions are part of ANSI C.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3641 Systems that do not even provide full ANSI C support should not
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3642 put a load on mmh.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3643 .Ci b067ff5c465a5d243ce5a19e562085a9a1a97215
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parents: 120
diff changeset
3644 .P
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markus schnalke <meillo@marmaro.de>
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diff changeset
3645 The
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diff changeset
3646 .Fu copy()
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3647 function copies the string in parameter one to the location in
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3648 parameter two.
121
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parents: 120
diff changeset
3649 In contrast to
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3650 .Fu strcpy() ,
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parents: 120
diff changeset
3651 it returns a pointer to the terminating null-byte in the destination area.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3652 The code was adjusted to replace
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3653 .Fu copy()
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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diff changeset
3654 with
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3655 .Fu strcpy() ,
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3656 except within
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3657 .Fu concat() ,
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3658 where
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3659 .Fu copy()
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3660 was more convenient.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3661 Therefore, the definition of
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3662 .Fu copy()
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3663 was moved into the source file of
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3664 .Fu concat()
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3665 and its visibility is now limited to it.
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3666 .Ci 552fd7253e5ee9e554c5c7a8248a6322aa4363bb
102
a782488c85f5 More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents: 101
diff changeset
3667 .P
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3668 The function
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3669 .Fu r1bindex()
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3670 had been a generalized version of
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3671 .Fu basename()
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3672 with minor differences.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3673 As all calls to
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3674 .Fu r1bindex()
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3675 had the slash (`/') as delimiter anyway,
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3676 replacing
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3677 .Fu r1bindex()
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3678 with the more specific and better-named function
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3679 .Fu basename()
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3680 became desirable.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3681 Unfortunately, many of the 54 calls to
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3682 .Fu r1bindex()
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3683 depended on a special behavior,
121
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3684 which differed from the POSIX specification for
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3685 .Fu basename() .
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3686 Hence,
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3687 .Fu r1bindex()
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3688 was kept but renamed to
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3689 .Fu mhbasename() ,
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3690 fixing the delimiter to the slash.
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3691 .Ci 240013872c392fe644bd4f79382d9f5314b4ea60
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3692 For possible uses of
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parents: 120
diff changeset
3693 .Fu r1bindex()
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markus schnalke <meillo@marmaro.de>
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diff changeset
3694 with a different delimiter,
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3695 the ANSI C function
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3696 .Fu strrchr()
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3697 provides the core functionality.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3698 .P
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3699 The
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markus schnalke <meillo@marmaro.de>
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diff changeset
3700 .Fu ssequal()
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3701 function \(en apparently for ``substring equal'' \(en
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3702 was renamed to
edbc6e1dc636 New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3703 .Fu isprefix() ,
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3704 because this is what it actually checks.
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parents: 120
diff changeset
3705 .Ci c20b4fa14515c7ab388ce35411d89a7a92300711
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parents: 120
diff changeset
3706 Its source file had included the following comments, no joke.
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parents: 120
diff changeset
3707 .VS
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3708 /*
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3709 * THIS CODE DOES NOT WORK AS ADVERTISED.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3710 * It is actually checking if s1 is a PREFIX of s2.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3711 * All calls to this function need to be checked to see
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3712 * if that needs to be changed. Prefix checking is cheaper, so
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3713 * should be kept if it's sufficient.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3714 */
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3715
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3716 /*
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parents: 120
diff changeset
3717 * Check if s1 is a substring of s2.
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parents: 120
diff changeset
3718 * If yes, then return 1, else return 0.
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3719 */
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parents: 120
diff changeset
3720 VE
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3721 Two months later, it was completely removed by replacing it with
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3722 .Fu strncmp() .
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3723 .Ci b0b1dd37ff515578cf7cba51625189eb34a196cb
121
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markus schnalke <meillo@marmaro.de>
parents: 120
diff changeset
3724
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3725
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3726
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3727
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3728
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3729 .H2 "User Data Locations
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3730 .P
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3731 In nmh, a personal setup consists of the MH profile and the MH directory.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3732 The profile is a file named
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3733 .Fn \&.mh_profile
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3734 in the user's home directory.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3735 It contains the static configuration.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3736 It also contains the location of the MH directory in the profile entry
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3737 .Pe Path .
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3738 The MH directory contains the mail storage and is the first
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3739 place to search for personal forms, scan formats, and similar
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3740 configuration files.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3741 The location of the MH directory can be chosen freely by the user.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3742 The default and usual name is a directory named
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3743 .Fn Mail
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3744 in the home directory.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3745 .P
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3746 The way MH data is splitted between profile and MH directory is a legacy.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3747 It is only sensible in a situation where the profile is the only
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3748 configuration file.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3749 Why else should the mail storage and the configuration files be intermixed?
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3750 They are different kinds of data:
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3751 The data to be operated on and the configuration to change how
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3752 tools operate.
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3753 .\" XXX bad ... inapropriate?
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3754 Splitting the configuration between the profile and the MH directory
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3755 is bad.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3756 Merging the mail storage and the configuration in one directory is bad
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3757 as well.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3758 As the mail storage and the configuration were not separated sensibly
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3759 in the first place, I did it now.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3760 .P
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3761 Personal mmh data is grouped by type, resulting in two distinct parts:
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3762 the mail storage and the configuration.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3763 In mmh, the mail storage directory still contains all the messages,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3764 but, in exception of public sequences files, nothing else.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3765 In difference to nmh, the auxiliary configuration files are no longer
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3766 located there.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3767 Therefore, the directory is no longer called the user's \fIMH directory\fP
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3768 but his \fImail storage\fP.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3769 Its location is still user-chosen, with the default name
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3770 .Fn Mail ,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3771 in the user's home directory.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3772 In mmh, the configuration is grouped together in
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3773 the hidden directory
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3774 .Fn \&.mmh
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3775 in the user's home directory.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3776 This \fImmh directory\fP contains the context file, personal forms,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3777 scan formats, and the like, but also the user's profile, now named
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3778 .Fn profile .
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3779 The location of the profile is no longer fixed to
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3780 .Fn $HOME/.mh_profile
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3781 but to
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3782 .Fn $HOME/.mmh/profile .
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3783 Having both the file
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3784 .Fn $HOME/.mh_profile
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3785 and the configuration directory
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3786 .Fn $HOME/.mmh
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3787 appeared to be inconsistent.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3788 The approach chosen for mmh is consistent, simple, and familiar to
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3789 Unix users.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
3790 .Ci 7030d7edb099bff36ded7548bb5380f7acab4f9b
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3791 .P
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
3792 MH allows users to have multiple MH setups.
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3793 Therefore, it is necessary to select a different profile.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3794 The profile is the single entry point to access the rest of a
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3795 personal MH setup.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3796 In nmh, the environment variable
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3797 .Ev MH
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3798 could be used to specifiy a different profile.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3799 To operate in the same MH setup with a separate context,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3800 the
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3801 .Ev MHCONTEXT
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3802 environment variable could be used.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3803 This allows having own current folders and current messages in
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3804 each terminal, for instance.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3805 In mmh, three environment variables are used.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3806 .Ev MMH
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3807 overrides the default location of the mmh directory (\c
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3808 .Fn .mmh ).
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3809 .Ev MMHP
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3810 and
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3811 .Ev MMHC
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3812 override the paths to the profile and context files, respectively.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3813 This approach allows the set of personal configuration files to be chosen
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3814 independently from the profile, context, and mail storage.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
3815 .Ci 7030d7edb099bff36ded7548bb5380f7acab4f9b
133
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3816 .P
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3817 The separation of the files by type is sensible and convenient.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3818 The new approach has no functional disadvantages,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3819 as every setup I can imagine can be implemented with both approaches,
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3820 possibly even easier with the new approach.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3821 The main achievement of the change is the clear and sensible split
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3822 between mail storage and configuration.
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3823
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3824
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3825
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3826
02660c14f6a8 Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents: 131
diff changeset
3827
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3828 .H2 "Modularization
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3829 .P
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3830 The source code of the mmh tools is located in the
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3831 .Fn uip
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3832 (``user interface programs'') directory.
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3833 Each tool has a source file with the name of the command.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3834 For example,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3835 .Pn rmm
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3836 is built from
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3837 .Fn uip/rmm.c .
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3838 Some source files are used for multiple programs.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3839 For example
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3840 .Fn uip/scansbr.c
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
3841 is used for both
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3842 .Pn scan
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3843 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3844 .Pn inc .
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3845 In nmh, 49 tools were built from 76 source files.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3846 This is a ratio of 1.6 source files per program.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3847 32 programs depended on multiple source files;
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3848 17 programs depended on one source file only.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3849 In mmh, 39 tools are built from 51 source files.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3850 This is a ratio of 1.3 source files per program.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3851 18 programs depend on multiple source files;
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3852 21 programs depend on one source file only.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3853 (These numbers and the ones in the following text ignore the MH library
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3854 as well as shell scripts and multiple names for the same program.)
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3855 .\" XXX graph
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3856 .P
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3857 Splitting the source code of a large program into multiple files can
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3858 increase the readability of its source code.
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3859 .\" XXX however?
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3860 Most of the mmh tools are simple and straight-forward programs.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3861 With the exception of the MIME handling tools,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3862 .Pn pick
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
3863 is the largest tool.
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
3864 It contains 1\|037 lines of source code, excluding the MH library.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3865 Only the MIME handling tools (\c
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3866 .Pn mhbuild ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3867 .Pn mhstore ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3868 .Pn show ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3869 etc.)
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3870 are larger.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3871 Splitting programs with less than 1\|000 lines of code into multiple
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3872 source files seldom leads to better readability.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3873 For such tools, splitting makes sense
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3874 when parts of the code are reused in other programs,
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
3875 and the reused code fragment is (1) not general enough
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
3876 for including it in the MH library
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
3877 or (2) has dependencies on a library that only few programs need.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3878 .Fn uip/packsbr.c ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3879 for instance, provides the core program logic for the
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3880 .Pn packf
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3881 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3882 .Pn rcvpack
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3883 programs.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3884 .Fn uip/packf.c
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3885 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3886 .Fn uip/rcvpack.c
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3887 mainly wrap the core function appropriately.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3888 No other tools use the folder packing functions.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3889 As another example,
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3890 .Fn uip/termsbr.c
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3891 provides termcap support, which requires linking with a termcap or
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3892 curses library.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3893 Including
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3894 .Fn uip/termsbr.c
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3895 into the MH library would require every program to be linked with
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3896 termcap or curses, although only few of the programs require it.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3897 .P
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3898 The task of MIME handling is complex enough that splitting its code
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3899 into multiple source files improves the readability.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3900 The program
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3901 .Pn mhstore ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3902 for instance, is compiled out of seven source files with 2\|500
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3903 lines of code in summary.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3904 The main code file
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3905 .Fn uip/mhstore.c
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3906 consists of 800 lines; the other 1\|700 lines of code are reused in
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3907 other MIME handling tools.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3908 It seems to be worthwhile to bundle the generic MIME handling code into
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3909 a MH-MIME library, as a companion to the MH standard library.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3910 This is left open for the future.
118
48e28eaee6f9 Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents: 116
diff changeset
3911 .P
169
f4ffe121a0a2 Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents: 168
diff changeset
3912 The work already accomplished focussed on the non-MIME tools.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3913 The amount of code compiled into each program was reduced.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3914 This eases the understanding of the code base.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3915 In nmh,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3916 .Pn comp
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3917 was built from six source files:
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3918 .Fn comp.c ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3919 .Fn whatnowproc.c ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3920 .Fn whatnowsbr.c ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3921 .Fn sendsbr.c ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3922 .Fn annosbr.c ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3923 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3924 .Fn distsbr.c .
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3925 In mmh, it builds from only two:
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3926 .Fn comp.c
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3927 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3928 .Fn whatnowproc.c .
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3929 In nmh's
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3930 .Pn comp ,
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3931 the core function of
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3932 .Pn whatnow ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3933 .Pn send ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3934 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3935 .Pn anno
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3936 were compiled into
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3937 .Pn comp .
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3938 This saved the need to execute these programs with
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3939 .Fu fork()
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3940 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3941 .Fu exec() ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3942 two expensive system calls.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3943 Whereas this approach improved the time performance,
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3944 it interwove the source code.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3945 Core functionalities were not encapsulated into programs but into
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3946 function, which were then wrapped by programs.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3947 For example,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3948 .Fn uip/annosbr.c
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3949 included the function
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3950 .Fu annotate() .
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3951 Each program that wanted to annotate messages, included the source file
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3952 .Fn uip/annosbr.c
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3953 and called
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3954 .Fu annotate() .
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3955 Because the function
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3956 .Fu annotate()
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3957 was used like the tool
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3958 .Pn anno ,
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3959 it had seven parameters, reflecting the command line switches of the tool.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3960 When another pair of command line switches was added to
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3961 .Pn anno ,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3962 a rather ugly hack was implemented to avoid adding another parameter
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3963 to the function.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3964 .Ci d9b1d57351d104d7ec1a5621f090657dcce8cb7f
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3965 .P
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3966 Separation simplifies the understanding of program code
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3967 because the area influenced by any particular statement is smaller.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3968 The separating on the program-level is more strict than the separation
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3969 on the function level.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3970 In mmh, the relevant code of
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3971 .Pn comp
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3972 comprises the two files
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3973 .Fn uip/comp.c
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3974 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3975 .Fn uip/whatnowproc.c ,
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3976 together 210 lines of code.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3977 In nmh,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3978 .Pn comp
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3979 comprises six files with 2\|450 lines.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3980 Not all of the code in these six files was actually used by
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3981 .Pn comp ,
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3982 but the code reader needed to read all of the code first to know which
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3983 parts were used.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3984 .P
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3985 As I have read a lot in the code base during the last two years,
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3986 I learned about the easy and the difficult parts.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3987 Code is easy to understand if the influenced code area is small
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
3988 and its boundaries are strictly defined.
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
3989 Furthermore, the code needs to solve the problem in a straight-forward way.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3990 .P
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3991 .\" XXX move this paragraph somewhere else?
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
3992 Reading
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3993 .Pn rmm 's
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3994 source code in
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3995 .Fn uip/rmm.c
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3996 is my recommendation for a beginner's entry point into the code base of nmh.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3997 The reasons are that the task of
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3998 .Pn rmm
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
3999 is straight forward and it consists of one small source code file only,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4000 yet its source includes code constructs typical for MH tools.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4001 With the introduction of the trash folder in mmh,
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4002 .Pn rmm
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4003 became a bit more complex, because it invokes
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4004 .Pn refile .
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4005 Still, it is a good example for a simple tool with clear sources.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4006 .P
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4007 Understanding
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4008 .Pn comp
180
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
4009 .\" XXX kate fragen: more vs. as much
731e747a805b Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 179
diff changeset
4010 requires to read 210 lines of code in mmh, but ten times more in nmh.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4011 Due to the aforementioned hack in
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4012 .Pn anno
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4013 to save the additional parameter, information passed through the program's
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4014 source base in obscure ways.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4015 Thus, understanding
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4016 .Pn comp ,
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4017 required understanding the inner workings of
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4018 .Fn uip/annosbr.c
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4019 first.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4020 To be sure to fully understand a program, its whole source code needs
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4021 to be examined.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4022 Not doing so is a leap of faith, assuming that the developers
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4023 have avoided obscure programming techniques.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4024 By separating the tools on the program-level, the boundaries are
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4025 clearly visible and technically enforced.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4026 The interfaces are calls to
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4027 .Fu exec()
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4028 rather than arbitrary function calls.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4029 .P
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4030 But the real problem is another:
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4031 Nmh violates the golden ``one tool, one job'' rule of the Unix philosophy.
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
4032 .\" XXX ref
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4033 Understanding
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4034 .Pn comp
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4035 requires understanding
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4036 .Fn uip/annosbr.c
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4037 and
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4038 .Fn uip/sendsbr.c
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4039 because
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4040 .Pn comp
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4041 does annotate and send messages.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4042 In nmh, there surely exists the tool
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4043 .Pn send ,
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
4044 which does mainly send messages.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4045 But
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4046 .Pn comp
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4047 and
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4048 .Pn repl
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4049 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4050 .Pn forw
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4051 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4052 .Pn dist
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4053 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4054 .Pn whatnow
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4055 and
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4056 .Pn viamail ,
179
b59201e345e5 Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents: 178
diff changeset
4057 they all (!) have the same message sending function included, as well.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4058 In result,
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4059 .Pn comp
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4060 sends messages without using
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4061 .Pn send .
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4062 The situation is the same as if
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4063 .Pn grep
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4064 would page without
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4065 .Pn more
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4066 just because both programs are part of the same code base.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4067 .P
173
4c7db172fb59 Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents: 171
diff changeset
4068 The clear separation on the surface \(en the tool chest approach \(en
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4069 is violated on the level below.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4070 This violation is for the sake of time performance.
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4071 On systems where
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4072 .Fu fork()
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4073 and
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4074 .Fu exec()
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4075 are expensive, the quicker response might be noticable.
124
3d30fd938aa9 Spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 123
diff changeset
4076 In the old times, sacrificing readability and conceptional beauty for
3d30fd938aa9 Spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 123
diff changeset
4077 speed might even have been a must to prevent MH from being unusably slow.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4078 Whatever the reasons had been, today they are gone.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4079 No longer should we sacrifice readability or conceptional beauty.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4080 No longer should we violate the Unix philosophy's ``one tool, one job''
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4081 guideline.
181
eb6eeb10afd5 Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents: 180
diff changeset
4082 .\" XXX ref
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4083 No longer should we keep speed improvements that became unnecessary.
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4084 .P
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4085 Therefore, mmh's
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4086 .Pn comp
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4087 does no longer send messages.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4088 In mmh, different jobs are divided among separate programs that
122
c234656329e0 Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents: 121
diff changeset
4089 invoke each other as needed.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4090 In consequence,
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4091 .Pn comp
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4092 invokes
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4093 .Pn whatnow
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4094 which thereafter invokes
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4095 .Pn send .
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4096 .Ci 3df5ab3c116e6d4a2fb4bb5cc9dfc5f781825815
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4097 .Ci c73c00bfccd22ec77e9593f47462aeca4a8cd9c0
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4098 The clear separation on the surface is maintained on the level below.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4099 Human users and the tools use the same interface \(en
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4100 annotations, for example, are made by invoking
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4101 .Pn anno ,
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4102 no matter if requested by programs or by human beings.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4103 .Ci 469a4163c2a1a43731d412eaa5d9cae7d670c48b
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4104 .Ci aed384169af5204b8002d06e7a22f89197963d2d
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4105 .Ci 3caf9e298a8861729ca8b8a84f57022b6f3ea742
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4106 The decrease of tools built from multiple source files and thus
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4107 the decrease of
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4108 .Fn uip/*sbr.c
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4109 files confirm the improvement.
168
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4110 .Ci 9e6d91313f01c96b4058d6bf419a8ca9a207bc33
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4111 .ci 81744a46ac9f845d6c2b9908074d269275178d2e
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4112 .Ci f0f858069d21111f0dbea510044593f89c9b0829
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4113 .Ci 0503a6e9be34f24858b55b555a5c948182b9f24b
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4114 .Ci 27826f9353e0f0b04590b7d0f8f83e60462b90f0
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4115 .Ci d1da1f94ce62160aebb30df4063ccbc53768656b
277eeb5ba223 Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents: 166
diff changeset
4116 .Ci c42222869e318fff5dec395eca3e776db3075455
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4117 .P
145
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4118 .\" XXX move this paragraph up somewhere
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4119 One disadvantage needs to be taken with this change:
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4120 The compiler can no longer check the integrity of the interfaces.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4121 By changing the command line interfaces of tools, it is
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4122 the developer's job to adjust the invocations of these tools as well.
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4123 As this is a manual task and regression tests, which could detect such
124
3d30fd938aa9 Spellchecking.
markus schnalke <meillo@marmaro.de>
parents: 123
diff changeset
4124 problems, are not available yet, it is prone to errors.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4125 These errors will not be detected at compile time but at run time.
171
346ff7e201f5 Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents: 169
diff changeset
4126 Installing regression tests is a pending task.
123
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4127 In the best case, a uniform way of invoking tools from other tools
740f4128dea7 Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents: 122
diff changeset
4128 can be developed to allow automated testing at compile time.
145
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4129
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4130
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4131 .ig
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4132 XXX consider writing about mhl vs. mhlproc
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4133
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4134 sbr/showfile.c
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4135
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4136 23 /*
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4137 24 ** If you have your lproc listed as "mhl",
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4138 25 ** then really invoked the mhlproc instead
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4139 26 ** (which is usually mhl anyway).
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4140 27 */
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4141
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4142 Sat Nov 24 19:09:14 1984 /mtr (agent: Marshall Rose) <uci@udel-dewey>
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4143
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4144 sbr/showfile.c: if lproc is "mhl", use mhlproc for consistency
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4145 (Actually, user should use "lproc: show", "showproc: mhl".)
3361e53dfcd6 Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents: 139
diff changeset
4146 ..