Mercurial > docs > master
annotate discussion.roff @ 183:4c5055a0e981
Explained `hidden switches'.
author | markus schnalke <meillo@marmaro.de> |
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date | Wed, 11 Jul 2012 10:13:54 +0200 |
parents | 764738b17b74 |
children | 5360f5fdb118 |
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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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12 |
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13 |
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14 |
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15 .\" -------------------------------------------------------------- |
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16 .H1 "Streamlining |
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17 |
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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. |
178 | 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23 I believe that the development of all-in-one mail systems is obsolete.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. |
89 | 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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59 |
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60 |
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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 |
178 | 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 |
110 | 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. |
89 | 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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98 .Ci f6aa95b724fd8c791164abe7ee5468bf5c34f226 |
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99 .Ci fecd5d34f65597a4dfa16aeabea7d74b191532c3 |
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100 .Ci 156d35f6425bea4c1ed3c4c79783dc613379c65b |
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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 |
178 | 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? |
159
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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 |
173
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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. |
169
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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. |
169
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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 .]]) |
171
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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. |
169
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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. |
164
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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, |
169
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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. |
169
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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 |
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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 |
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254 of available documentation. |
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255 Choices for MSAs range from full-featured MTAs such as |
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256 .\" XXX refs |
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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 |
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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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0e102cec0c73
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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 |
89 | 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, |
173
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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 |
169
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364 .Pn msh |
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365 together with the truly archaic code relicts |
58
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366 .Pn vmh |
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367 and |
169
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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. |
63 | 373 Less code means less bugs and less maintenance work. |
76
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374 As |
63 | 375 .Pn rcvtty |
376 and | |
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? |
125
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380 Removing them streamlines mmh. |
63 | 381 .Pn viamail 's |
382 use case is now partly obsolete and partly covered by | |
383 .Pn forw , | |
76
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384 hence there's no reason to still maintain it. |
63 | 385 .Pn conflict |
76
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386 is not related to the mail client, and |
63 | 387 .Pn msh |
388 conflicts with the basic concept of MH. | |
169
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389 These two tools might still be useful, but they should not be part of mmh. |
63 | 390 .P |
169
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391 Finally, there is |
76
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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. |
100
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395 It should be removed from mmh, because including it conflicts with |
178 | 396 the idea that mmh is an MUA only. |
100
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397 .Pn slocal |
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398 should rather become a separate project. |
87
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399 However, |
76
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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. |
87
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403 Although |
76
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404 .Pn slocal |
169
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405 neither pulls in dependencies, nor does it include a separate |
154
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406 technical area (cf. Sec. |
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407 .Cf mail-transfer-facilities ), |
169
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408 it still accounts for about 1\|000 lines of code that need to be maintained. |
76
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409 As |
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410 .Pn slocal |
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411 is almost self-standing, it should be split off into a separate project. |
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412 This would cut the strong connection between the MUA mmh and the MDA |
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413 .Pn slocal . |
87
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414 For anyone not using MH, |
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415 .Pn slocal |
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416 would become yet another independent MDA, like |
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417 .I procmail . |
100
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418 Then |
87
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419 .Pn slocal |
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420 could be installed without the complete MH system. |
76
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421 Likewise, mmh users could decide to use |
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422 .I procmail |
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423 without having a second, unused MDA, |
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424 .Pn slocal , |
76
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425 installed. |
100
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426 That appears to be conceptionally the best solution. |
76
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427 Yet, |
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428 .Pn slocal |
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429 is not split off. |
100
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430 I defer the decision over |
78 | 431 .Pn slocal |
169
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432 out of a need for deeper investigation. |
100
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433 In the meanwhile, it remains part of mmh. |
159
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434 However, its continued existence is not significant because |
100
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435 .Pn slocal |
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436 is unrelated to the rest of the project. |
58
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437 |
0
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438 |
133
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439 |
134
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440 .H2 "Displaying Messages |
155
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441 .Id mhshow |
131
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442 .P |
133
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443 Since the very beginning, already in the first concept paper, |
159
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444 .\" XXX ref!!! |
58
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445 .Pn show |
62
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446 had been MH's message display program. |
58
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447 .Pn show |
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448 mapped message numbers and sequences to files and invoked |
58
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449 .Pn mhl |
89 | 450 to have the files formatted. |
173
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451 With MIME, this approach was not sufficient anymore. |
100
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452 MIME messages can consist of multiple parts. Some parts are not |
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453 directly displayable and text content might be encoded in |
58
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454 foreign charsets. |
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455 .Pn show 's |
76
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456 understanding of messages and |
58
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457 .Pn mhl 's |
173
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458 display capabilities could not cope with the task any longer. |
62
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459 .P |
88 | 460 Instead of extending these tools, additional tools were written from |
461 scratch and added to the MH tool chest. | |
462 Doing so is encouraged by the tool chest approach. | |
463 Modular design is a great advantage for extending a system, | |
464 as new tools can be added without interfering with existing ones. | |
62
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465 First, the new MIME features were added in form of the single program |
58
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466 .Pn mhn . |
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467 The command |
82
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468 .Cl "mhn -show 42 |
58
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469 would show the MIME message numbered 42. |
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470 With the 1.0 release of nmh in February 1999, Richard Coleman finished |
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471 the split of |
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472 .Pn mhn |
88 | 473 into a set of specialized tools, which together covered the |
474 multiple aspects of MIME. | |
475 One of them was | |
69
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Wrote more about the show-mhshow merge.
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476 .Pn mhshow , |
88 | 477 which replaced |
478 .Cl "mhn -show" . | |
479 It was capable of displaying MIME messages appropriately. | |
62
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480 .P |
88 | 481 From then on, two message display tools were part of nmh, |
76
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482 .Pn show |
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483 and |
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484 .Pn mhshow . |
88 | 485 To ease the life of users, |
69
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486 .Pn show |
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487 was extended to automatically hand the job over to |
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488 .Pn mhshow |
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489 if displaying the message would be beyond |
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490 .Pn show 's |
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|
491 abilities. |
88 | 492 In consequence, the user would simply invoke |
69
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493 .Pn show |
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494 (possibly through |
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495 .Pn next |
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496 or |
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497 .Pn prev ) |
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498 and get the message printed with either |
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499 .Pn show |
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500 or |
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501 .Pn mhshow , |
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502 whatever was more appropriate. |
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503 .P |
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504 Having two similar tools for essentially the same task is redundant. |
173
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505 Usually, users would not distinguish between |
88 | 506 .Pn show |
507 and | |
508 .Pn mhshow | |
509 in their daily mail reading. | |
510 Having two separate display programs was therefore mainly unnecessary | |
511 from a user's point of view. | |
512 Besides, the development of both programs needed to be in sync, | |
76
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513 to ensure that the programs behaved in a similar way, |
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514 because they were used like a single tool. |
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515 Different behavior would have surprised the user. |
69
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516 .P |
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517 Today, non-MIME messages are rather seen to be a special case of |
100
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518 MIME messages, although it is the other way round. |
69
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519 As |
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520 .Pn mhshow |
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521 had already been able to display non-MIME messages, it appeared natural |
69
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522 to drop |
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523 .Pn show |
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524 in favor of using |
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525 .Pn mhshow |
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526 exclusively. |
88 | 527 .Ci 4c1efddfd499300c7e74263e57d8aa137e84c853 |
528 Removing | |
529 .Pn show | |
530 is no loss in function, because functionally | |
531 .Pn mhshow | |
532 covers it completely. | |
533 The old behavior of | |
534 .Pn show | |
535 can still be emulated with the simple command line: | |
536 .VS | |
537 mhl `mhpath c` | |
538 VE | |
539 .P | |
76
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540 For convenience, |
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541 .Pn mhshow |
88 | 542 was renamed to |
543 .Pn show | |
544 after | |
545 .Pn show | |
546 was gone. | |
547 It is clear that such a rename may confuse future developers when | |
548 trying to understand the history. | |
549 Nevertheless, I consider the convenience on the user's side, | |
550 to call | |
551 .Pn show | |
552 when they want a message to be displayed, to outweigh the inconvenience | |
553 on the developer's side when understanding the project history. | |
69
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554 .P |
88 | 555 To prepare for the transition, |
69
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556 .Pn mhshow |
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557 was reworked to behave more like |
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558 .Pn show |
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559 first. |
154
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560 (cf. Sec. |
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561 .Cf mhshow ) |
164
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Reacted to suggestions by Aaron Mueller.
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diff
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562 .\" XXX code commits? |
88 | 563 Once the tools behaved more alike, the replacing appeared to be |
564 even more natural. | |
565 Today, mmh's new | |
69
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566 .Pn show |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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567 has become the one single message display program once more, |
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568 with the difference |
88 | 569 that today it handles MIME messages as well as non-MIME messages. |
570 The outcome of the transition is one program less to maintain, | |
571 no second display program for users to deal with, | |
572 and less system complexity. | |
69
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573 .P |
88 | 574 Still, removing the old |
69
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575 .Pn show |
88 | 576 hurts in one regard: It had been such a simple program. |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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577 Its lean elegance is missing from the new |
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578 .Pn show , |
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579 .\" XXX |
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580 however there is no alternative; |
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581 supporting MIME demands higher essential complexity. |
58
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582 |
134
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583 .ig |
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584 XXX |
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585 Consider including text on scan listings here |
131
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586 |
134
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587 Scan listings shall not contain body content. Hence, removed this feature. |
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588 Scan listings shall operator on message headers and non-message information |
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589 only. Displaying the beginning of the body complicates everything too much. |
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590 That's no surprise, because it's something completely different. If you |
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591 want to examine the body, then use show(1)/mhshow(1). |
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592 Changed the default scan formats accordingly. |
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593 .Ci 70b2643e0da8485174480c644ad9785c84f5bff4 |
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594 .. |
131
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595 |
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596 |
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597 |
133
02660c14f6a8
Further re-ordering of the sections.
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parents:
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diff
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|
598 |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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|
599 .H2 "Configure Options |
58
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51
diff
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|
600 .P |
76
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Rework of existing text.
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74
diff
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601 Customization is a double-edged sword. |
2e61e0004a8f
Rework of existing text.
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602 It allows better suiting setups, but not for free. |
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Rework of existing text.
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diff
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603 There is the cost of code complexity to be able to customize. |
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Rework of existing text.
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604 There is the cost of less tested setups, because there are |
171
346ff7e201f5
Applied suggestions by Boris.
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diff
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605 more possible setups and especially corner cases. |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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606 Additionally, there is the cost of choice itself. |
76
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Rework of existing text.
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607 The code complexity directly affects the developers. |
173
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Various corrections and improvements.
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608 Less tested code affects both users and developers. |
159
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609 The problem of choice affects the users, for once by having to choose, |
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610 but also by more complex interfaces that require more documentation. |
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611 Whenever options add few advantages but increase the complexity of the |
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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612 system, they should be considered for removal. |
72
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613 I have reduced the number of project-specific configure options from |
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614 fifteen to three. |
74
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A lot of new text about configure switches.
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615 |
76
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616 .U3 "Mail Transfer Facilities |
74
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617 .P |
85
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618 With the removal of the mail transfer facilities five configure |
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619 options vanished: |
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620 .P |
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621 The switches |
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Extended the text about mail transfer configure options.
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622 .Sw --with-tls |
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Extended the text about mail transfer configure options.
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623 and |
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|
624 .Sw --with-cyrus-sasl |
89 | 625 had activated the support for transfer encryption and authentication. |
159
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626 .\" XXX cf |
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627 .\" XXX gruende kurz wiederholen |
85
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628 This is not needed anymore. |
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629 .Ci fecd5d34f65597a4dfa16aeabea7d74b191532c3 |
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630 .Ci 156d35f6425bea4c1ed3c4c79783dc613379c65b |
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631 .P |
159
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632 .\" XXX cf |
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633 .\" XXX ``For the same reason ...'' |
85
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634 The configure switch |
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635 .Sw --enable-pop |
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636 activated the message retrieval facility. |
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diff
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637 The code area that would be conditionally compiled in for TLS and SASL |
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638 support had been small. |
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639 The conditionally compiled code area for POP support had been much larger. |
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|
640 Whereas the code base changes would only slightly change on toggling |
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641 TLS or SASL support, it changed much on toggling POP support. |
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642 The changes in the code base could hardly be overviewed. |
159
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|
643 By having POP support togglable, a second code base had been created, |
85
fb0d1b4c8fb1
Extended the text about mail transfer configure options.
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parents:
84
diff
changeset
|
644 one that needed to be tested. |
fb0d1b4c8fb1
Extended the text about mail transfer configure options.
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parents:
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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
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|
646 code, but there the changes are minor and can yet be overviewed. |
fb0d1b4c8fb1
Extended the text about mail transfer configure options.
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parents:
84
diff
changeset
|
647 Still, conditional compilation of a code base creates variations |
fb0d1b4c8fb1
Extended the text about mail transfer configure options.
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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.
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98
diff
changeset
|
652 .Sw --with-mts |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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|
653 defined the default transport service. |
85
fb0d1b4c8fb1
Extended the text about mail transfer configure options.
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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>
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159
diff
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|
657 default SMTP servers could be specified. |
72
bae9273b5802
Wrote about configure options (not finished yet).
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parents:
69
diff
changeset
|
658 .Ci 128545e06224233b7e91fc4c83f8830252fe16c9 |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
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|
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
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|
671 .\" XXX Zeitlich ordnen |
78 | 672 In July 2000, Kimmo Suominen introduced |
673 the configure option | |
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 | 676 The choice was probably personal preference, because first, the |
677 option was named | |
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 | 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 | 697 data loss. |
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 | 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 | 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 | 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.
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775 .Ci f85f4b7ae62e3d05a945dcd46ead51f0a2a89a9b |
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Rework of existing text.
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|
776 .P |
89 | 777 The pager to use is determined in a similar order, |
74
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|
778 also taking the first available and non-empty item: |
171
346ff7e201f5
Applied suggestions by Boris.
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diff
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|
779 .LI 1 |
74
cefaa856d431
A lot of new text about configure switches.
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|
780 Environment variable |
cefaa856d431
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|
781 .Ev MMHPAGER |
171
346ff7e201f5
Applied suggestions by Boris.
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169
diff
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|
782 .LI 2 |
74
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diff
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|
783 Profile entry |
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72
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|
784 .Pe Pager |
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diff
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|
785 (replaces |
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|
786 .Pe moreproc ) |
171
346ff7e201f5
Applied suggestions by Boris.
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diff
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|
787 .LI 3 |
74
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A lot of new text about configure switches.
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|
788 Environment variable |
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|
789 .Ev PAGER |
171
346ff7e201f5
Applied suggestions by Boris.
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diff
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|
790 .LI 4 |
74
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A lot of new text about configure switches.
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|
791 Command |
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72
diff
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|
792 .Pn more . |
171
346ff7e201f5
Applied suggestions by Boris.
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|
793 .LP |
74
cefaa856d431
A lot of new text about configure switches.
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|
794 .Ci 0c4214ea2aec6497d0d67b436bbee9bc1d225f1e |
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diff
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|
795 .P |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
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|
796 By respecting the |
74
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A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
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|
797 .Ev VISUAL /\c |
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A lot of new text about configure switches.
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72
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|
798 .Ev EDITOR |
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A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
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72
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|
799 and |
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A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
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|
800 .Ev PAGER |
76
2e61e0004a8f
Rework of existing text.
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|
801 environment variables, |
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
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|
802 the new behavior confirms better to the common style on Unix systems. |
2e61e0004a8f
Rework of existing text.
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|
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
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A lot of new text about configure switches.
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72
diff
changeset
|
805 |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
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74
diff
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|
806 .U3 "ndbm |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
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72
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|
807 .P |
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A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
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72
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|
808 .Pn slocal |
78 | 809 used to depend on |
74
cefaa856d431
A lot of new text about configure switches.
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72
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|
810 .I ndbm , |
cefaa856d431
A lot of new text about configure switches.
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72
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|
811 a database library. |
76
2e61e0004a8f
Rework of existing text.
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|
812 The database is used to store the `\fLMessage-ID\fP's of all |
2e61e0004a8f
Rework of existing text.
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74
diff
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|
813 messages delivered. |
74
cefaa856d431
A lot of new text about configure switches.
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72
diff
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|
814 This enables |
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A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
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72
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|
815 .Pn slocal |
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A lot of new text about configure switches.
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diff
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|
816 to suppress delivering the same message to the same user twice. |
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A lot of new text about configure switches.
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817 (This features was enabled by the |
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A lot of new text about configure switches.
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|
818 .Sw -suppressdup |
cefaa856d431
A lot of new text about configure switches.
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|
819 switch.) |
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A lot of new text about configure switches.
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|
820 .P |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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|
821 A variety of versions of the database library exist. |
78 | 822 .[ |
823 wolter unix incompat notes dbm | |
824 .] | |
74
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A lot of new text about configure switches.
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825 Complicated autoconf code was needed to detect them correctly. |
181
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
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|
826 Furthermore, the configure switches |
74
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A lot of new text about configure switches.
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|
827 .Sw --with-ndbm=ARG |
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A lot of new text about configure switches.
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|
828 and |
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A lot of new text about configure switches.
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|
829 .Sw --with-ndbmheader=ARG |
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A lot of new text about configure switches.
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|
830 were added to help with difficult setups that would |
78 | 831 not be detected automatically or correctly. |
72
bae9273b5802
Wrote about configure options (not finished yet).
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69
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|
832 .P |
74
cefaa856d431
A lot of new text about configure switches.
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72
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|
833 By removing the suppress duplicates feature of |
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A lot of new text about configure switches.
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|
834 .Pn slocal , |
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72
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|
835 the dependency on |
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A lot of new text about configure switches.
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72
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|
836 .I ndbm |
78 | 837 vanished and 120 lines of complex autoconf code could be saved. |
74
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A lot of new text about configure switches.
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|
838 .Ci ecd6d6a20cb7a1507e3a20d6c4cb3a1cf14c6bbf |
89 | 839 The change removed functionality too, but that is minor to the |
78 | 840 improvement by dropping the dependency and the complex autoconf code. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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|
841 .\" XXX argument: slocal ist sowieso nicht teil vom mmh kern |
74
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A lot of new text about configure switches.
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72
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|
842 |
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|
843 .U3 "mh-e Support |
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A lot of new text about configure switches.
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|
844 .P |
cefaa856d431
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diff
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|
845 The configure option |
cefaa856d431
A lot of new text about configure switches.
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72
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|
846 .Sw --disable-mhe |
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A lot of new text about configure switches.
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|
847 was removed when the mh-e support was reworked. |
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A lot of new text about configure switches.
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|
848 Mh-e is the Emacs front-end to MH. |
76
2e61e0004a8f
Rework of existing text.
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74
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|
849 It requires MH to provide minor additional functions. |
2e61e0004a8f
Rework of existing text.
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74
diff
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|
850 The |
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
851 .Sw --disable-mhe |
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
852 configure option could switch these extensions off. |
2e61e0004a8f
Rework of existing text.
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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.
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72
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|
854 only the |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
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|
855 .Sw -build |
76
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
856 switches of |
74
cefaa856d431
A lot of new text about configure switches.
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72
diff
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|
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.
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parents:
74
diff
changeset
|
860 are left to be mh-e extensions. |
2e61e0004a8f
Rework of existing text.
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74
diff
changeset
|
861 They are now always built in because they add little code and complexity. |
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
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|
862 In consequence, the |
74
cefaa856d431
A lot of new text about configure switches.
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72
diff
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|
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
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|
866 Removing the option removed a second code setup that would have |
cefaa856d431
A lot of new text about configure switches.
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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:
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diff
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|
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.
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parents:
74
diff
changeset
|
870 .P |
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
871 The interface changes in mmh require mh-e to be adjusted in order |
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
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|
872 to be able to use mmh as back-end. |
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
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|
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).
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parents:
69
diff
changeset
|
876 |
74
cefaa856d431
A lot of new text about configure switches.
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72
diff
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|
877 .U3 "Masquerading |
cefaa856d431
A lot of new text about configure switches.
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diff
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|
878 .P |
cefaa856d431
A lot of new text about configure switches.
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parents:
72
diff
changeset
|
879 The configure option |
cefaa856d431
A lot of new text about configure switches.
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72
diff
changeset
|
880 .Sw --enable-masquerade |
76
2e61e0004a8f
Rework of existing text.
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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.
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diff
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|
883 They activated different types of address masquerading. |
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A lot of new text about configure switches.
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72
diff
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|
884 All of them were implemented in the SMTP-speaking |
cefaa856d431
A lot of new text about configure switches.
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72
diff
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|
885 .Pn post |
76
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
886 command, which provided an MSA. |
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
887 Address masquerading is an MTA's task and mmh does not cover |
2e61e0004a8f
Rework of existing text.
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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.
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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.
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parents:
72
diff
changeset
|
894 available in the original MH. |
cefaa856d431
A lot of new text about configure switches.
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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.
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parents:
74
diff
changeset
|
899 mapping, based on the password file's GECOS field. |
74
cefaa856d431
A lot of new text about configure switches.
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parents:
72
diff
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|
900 The man page |
181
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
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|
901 .Mp mh-tailor (5) |
74
cefaa856d431
A lot of new text about configure switches.
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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.
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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
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|
935 had not supported it already. |
76
2e61e0004a8f
Rework of existing text.
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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
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|
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
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|
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)
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parents:
82
diff
changeset
|
958 .Hd From |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
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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.
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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.
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parents:
72
diff
changeset
|
962 address for use as envelope sender address. |
cefaa856d431
A lot of new text about configure switches.
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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.
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72
diff
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|
966 .Pn sendmail 's |
cefaa856d431
A lot of new text about configure switches.
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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)
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parents:
82
diff
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|
969 The |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
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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.
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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 | 989 |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
98
diff
changeset
|
990 .H2 "Command Line Switches |
93
093ccf39a45e
Write text about removal of switches; Included the grap figure.
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89
diff
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|
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.
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parents:
169
diff
changeset
|
993 .\" XXX ref |
93
093ccf39a45e
Write text about removal of switches; Included the grap figure.
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|
994 They are words, introduced by a single dash. |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
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|
995 For example: |
093ccf39a45e
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|
996 .Cl "-truncate" . |
093ccf39a45e
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|
997 Every program in mmh has two generic switches: |
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Write text about removal of switches; Included the grap figure.
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|
998 .Sw -help , |
093ccf39a45e
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|
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
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|
1002 .P |
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|
1003 Switches change the behavior of programs. |
093ccf39a45e
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|
1004 Programs that do one thing in one way require no switches. |
093ccf39a45e
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|
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
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|
1006 If there is basically one task to accomplish, but it should be done |
93
093ccf39a45e
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|
1007 in various ways, switches are a good approach to alter the behavior |
093ccf39a45e
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|
1008 of a program. |
093ccf39a45e
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|
1009 Changing the behavior of programs provides flexibility and customization |
97
29a7454fcded
Added references to commits.
markus schnalke <meillo@marmaro.de>
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96
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|
1010 to users, but at the same time it complicates the code, documentation and |
93
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|
1011 usage of the program. |
97
29a7454fcded
Added references to commits.
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parents:
96
diff
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|
1012 .\" XXX: Ref |
93
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|
1013 Therefore, the number of switches should be kept small. |
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1014 A small set of well-chosen switches does no harm. |
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1015 But usually, the number of switches increases over time. |
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|
1016 Already in 1985, Rose and Romine have identified this as a major |
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|
1017 problem of MH: |
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|
1018 .[ [ |
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|
1019 rose romine real work |
093ccf39a45e
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|
1020 .], p. 12] |
98
d894191d7a33
style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents:
97
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1021 .QS |
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1022 A complaint often heard about systems which undergo substantial development |
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1023 by many people over a number of years, is that more and more options are |
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1024 introduced which add little to the functionality but greatly increase the |
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1025 amount of information a user needs to know in order to get useful work done. |
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1026 This is usually referred to as creeping featurism. |
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1027 .QP |
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1028 Unfortunately MH, having undergone six years of off-and-on development by |
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1029 ten or so well-meaning programmers (the present authors included), |
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1030 suffers mightily from this. |
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1031 .QE |
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1032 .P |
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1033 Being reluctant to adding new switches \(en or `options', |
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1034 as Rose and Romine call them \(en is one part of a counter-action, |
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1035 the other part is removing hardly used switches. |
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1036 Nmh's tools had lots of switches already implemented, |
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1037 hence, cleaning up by removing some of them was the more important part |
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1038 of the counter-action. |
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1039 Removing existing functionality is always difficult because it |
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1040 breaks programs that use these functions. |
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1041 Also, for every obsolete feature, there'll always be someone who still |
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1042 uses it and thus opposes its removal. |
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1043 This puts the developer into the position, |
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1044 where sensible improvements to style are regarded as destructive acts. |
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1045 Yet, living with the featurism is far worse, in my eyes, because |
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1046 future needs will demand adding further features, |
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1047 worsening the situation more and more. |
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1048 Rose and Romine added in a footnote, |
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1049 ``[...] |
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1050 .Pn send |
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1051 will no doubt acquire an endless number of switches in the years to come.'' |
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1052 Although clearly humorous, the comment points to the nature of the problem. |
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1053 Refusing to add any new switches would encounter the problem at its root, |
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1054 but this is not practical. |
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1055 New needs will require new switches and it would be unwise to block |
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1056 them strictly. |
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1057 Nevertheless, removing obsolete switches still is an effective approach |
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1058 to deal with the problem. |
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1059 Working on an experimental branch without an established user base, |
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1060 eased my work because I did not offend users when I removed existing |
110 | 1061 functions. |
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1062 .P |
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1063 Rose and Romine counted 24 visible and 9 more hidden switches for |
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1064 .Pn send . |
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1065 In nmh, they increased up to 32 visible and 12 hidden ones. |
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1066 At the time of writing, no more than 4 visible switches and 1 hidden switch |
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1067 have remained in mmh's |
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1068 .Pn send . |
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1069 These numbers include two generic switches, |
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1070 .Sw -help |
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1071 and |
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1072 .Sw -Version . |
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1073 Hidden switches are ones not documented. |
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1074 In mmh, 12 tools have hidden switches. |
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1075 9 of them are |
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1076 .Sw -debug |
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1077 switches, the other 6 provide special interfaces for internal use. |
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1078 .P |
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1079 The figure displays the number of switches for each of the tools |
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1080 that is available in both nmh and mmh. |
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1081 The tools are sorted by the number of switches they had in nmh. |
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1082 Visible and hidden switches were counted, |
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1083 but not the generic help and version switches. |
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1084 Whereas in the beginning of the project, the average tool had 11 switches, |
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1085 now it has no more than 5 \(en only half as many. |
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1086 If the `no' switches and similar inverse variant are folded onto |
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1087 their counter-parts, the average tool had 8 switches in pre-mmh times and |
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1088 has 4 now. |
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1089 The total number of functional switches in mmh dropped from 465 |
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1090 to 233. |
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1091 |
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1092 .KS |
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1093 .in 1c |
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1094 .so input/switches.grap |
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1095 .KE |
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1096 |
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1097 .P |
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1098 A part of the switches vanished after functions were removed. |
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1099 This was the case for network mail transfer, for instance. |
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1100 Sometimes, however, the work flow was the other way: |
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1101 I looked through the |
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1102 .Mp mh-chart (7) |
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1103 man page to identify the tools with apparently too many switches. |
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1104 Then considering the value of each of the switches by examining |
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1105 the tool's man page and source code, aided by recherche and testing. |
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1106 This way, the removal of functions was suggested by the aim to reduce |
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1107 the number of switches per command. |
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1108 |
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1109 |
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1110 .U3 "Draft Folder Facility |
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1111 .P |
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1112 A change early in the project was the complete transition from |
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1113 the single draft message to the draft folder facility. |
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1114 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860 |
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1115 .\" XXX ref to section ... |
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1116 The draft folder facility was introduced in the mid-eighties, when |
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1117 Rose and Romine called it a ``relatively new feature''. |
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1118 .[ |
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1119 rose romine real work |
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1120 .] |
110 | 1121 Since then, the facility had existed but was inactive by default. |
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1122 The default activation and the related rework of the tools made it |
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1123 possible to remove the |
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1124 .Sw -[no]draftfolder , |
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1125 and |
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1126 .Sw -draftmessage |
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1127 switches from |
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1128 .Pn comp , |
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1129 .Pn repl , |
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1130 .Pn forw , |
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1131 .Pn dist , |
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1132 .Pn whatnow , |
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1133 and |
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1134 .Pn send . |
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1135 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860 |
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1136 The only flexibility removed with this change is having multiple |
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1137 draft folders within one profile. |
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1138 I consider this a theoretical problem only. |
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1139 At the same time, the |
93
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1140 .Sw -draft |
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1141 switch of |
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1142 .Pn anno , |
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1143 .Pn refile , |
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1144 and |
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1145 .Pn send |
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1146 was removed. |
159
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1147 The special treatment of \fIthe\fP draft message became irrelevant after |
93
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1148 the rework of the draft system. |
159
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1149 (cf. Sec. |
154
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1150 .Cf draft-folder ) |
164
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1151 Furthermore, |
95
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1152 .Pn comp |
164
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1153 no longer needs a |
95
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1154 .Sw -file |
164
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1155 switch as the draft folder facility together with the |
95
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1156 .Sw -form |
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1157 switch are sufficient. |
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1158 |
95
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1159 |
102
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1160 .U3 "In Place Editing |
93
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1161 .P |
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1162 .Pn anno |
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1163 had the switches |
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1164 .Sw -[no]inplace |
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1165 to either annotate the message in place and thus preserve hard links, |
93
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1166 or annotate a copy to replace the original message, breaking hard links. |
97
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1167 Following the assumption that linked messages should truly be the |
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1168 same message, and annotating it should not break the link, the |
93
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1169 .Sw -[no]inplace |
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1170 switches were removed and the previous default |
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1171 .Sw -inplace |
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1172 was made the only behavior. |
97
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1173 .Ci c8195849d2e366c569271abb0f5f60f4ebf0b4d0 |
93
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1174 The |
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1175 .Sw -[no]inplace |
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1176 switches of |
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1177 .Pn repl , |
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1178 .Pn forw , |
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1179 and |
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1180 .Pn dist |
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1181 could be removed, too, as they were simply passed through to |
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1182 .Pn anno . |
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1183 .P |
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1184 .Pn burst |
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1185 also had |
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1186 .Sw -[no]inplace |
95
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1187 switches, but with different meaning. |
93
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1188 With |
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1189 .Sw -inplace , |
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1190 the digest had been replaced by the table of contents (i.e. the |
110 | 1191 introduction text) and the burst messages were placed right |
93
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1192 after this message, renumbering all following messages. |
95
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1193 Also, any trailing text of the digest was lost, though, |
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1194 in practice, it usually consists of an end-of-digest marker only. |
95
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1195 Nontheless, this behavior appeared less elegant than the |
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1196 .Sw -noinplace |
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1197 behavior, which already had been the default. |
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1198 Nmh's |
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1199 .Mp burst (1) |
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1200 man page reads: |
98
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1201 .QS |
164
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1202 If |
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1203 .Sw -noinplace |
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1204 is given, each digest is preserved, no table |
95
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1205 of contents is produced, and the messages contained within |
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1206 the digest are placed at the end of the folder. Other messages |
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1207 are not tampered with in any way. |
98
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1208 .QE |
95
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1209 .LP |
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1210 The decision to drop the |
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1211 .Sw -inplace |
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1212 behavior was supported by the code complexity and the possible data loss |
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1213 it caused. |
93
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1214 .Sw -noinplace |
95
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1215 was chosen to be the definitive behavior. |
97
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1216 .Ci 68a686adeb39223a5e1ad35e4a24890ec053679d |
95
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1217 |
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1218 |
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1219 .U3 "Forms and Format Strings |
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1220 .P |
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1221 Historically, the tools that had |
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1222 .Sw -form |
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1223 switches to supply a form file had |
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1224 .Sw -format |
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1225 switches as well to supply the contents of a form file as a string |
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1226 on the command line directly. |
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1227 In consequence, the following two lines equaled: |
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1228 .VS |
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1229 scan -form scan.mailx |
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1230 scan -format "`cat .../scan.mailx`" |
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1231 VE |
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1232 The |
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1233 .Sw -format |
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1234 switches were dropped in favor for extending the |
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1235 .Sw -form |
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1236 switches. |
97
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1237 .Ci f51956be123db66b00138f80464d06f030dbb88d |
95
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1238 If their argument starts with an equal sign (`='), |
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1239 then the rest of the argument is taken as a format string, |
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1240 otherwise the arguments is treated as the name of a format file. |
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1241 Thus, now the following two lines equal: |
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1242 .VS |
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1243 scan -form scan.mailx |
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1244 scan -form "=`cat .../scan.mailx`" |
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1245 VE |
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1246 This rework removed the prefix collision between |
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1247 .Sw -form |
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1248 and |
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1249 .Sw -format . |
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1250 Now, typing |
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1251 .Sw -fo |
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1252 suffices to specify form or format string. |
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1253 .P |
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1254 The different meaning of |
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1255 .Sw -format |
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1256 for |
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1257 .Pn repl |
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1258 and |
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1259 .Pn forw |
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1260 was removed in mmh. |
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1261 .Pn forw |
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1262 was completely switched to MIME-type forwarding, thus removing the |
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1263 .Sw -[no]format . |
97
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1264 .Ci 6e271608b7b9c23771523f88d23a4d3593010cf1 |
95
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1265 For |
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1266 .Pn repl , |
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1267 the |
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1268 .Sw -[no]format |
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1269 switches were reworked to |
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1270 .Sw -[no]filter |
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1271 switches. |
97
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1272 .Ci 67411b1f95d6ec987b4c732459e1ba8a8ac192c6 |
95
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1273 The |
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1274 .Sw -format |
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|
1275 switches of |
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1276 .Pn send |
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1277 and |
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1278 .Pn post , |
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1279 which had a third meaning, |
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1280 were removed likewise. |
97
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1281 .Ci f3cb7cde0e6f10451b6848678d95860d512224b9 |
95
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1282 Eventually, the ambiguity of the |
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1283 .Sw -format |
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1284 switches was resolved by not anymore having any such switch in mmh. |
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1285 |
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1286 |
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1287 .U3 "MIME Tools |
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1288 .P |
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1289 The MIME tools, which were once part of |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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diff
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1290 .Pn mhn |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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1291 .\" XXX |
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diff
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1292 (whatever that stood for), |
95
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1293 had several switches that added little practical value to the programs. |
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1294 The |
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1295 .Sw -[no]realsize |
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1296 switches of |
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1297 .Pn mhbuild |
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More text about switches.
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|
1298 and |
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1299 .Pn mhlist |
97
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1300 were removed, doing real size calculations always now |
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1301 .Ci 8d8f1c3abc586c005c904e52c4adbfe694d2201c , |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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1302 as nmh's |
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1303 .Mp mhbuild (1) |
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1304 man page states |
95
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1305 ``This provides an accurate count at the expense of a small delay.'' |
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1306 This small delay is not noticable on modern systems. |
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1307 .P |
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|
1308 The |
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1309 .Sw -[no]check |
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1310 switches were removed together with the support for |
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1311 .Hd Content-MD5 |
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|
1312 header fields. |
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|
1313 .[ |
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1314 rfc 1864 |
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1315 .] |
97
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1316 .Ci 31dc797eb5178970d68962ca8939da3fd9a8efda |
154
63e885fb48ba
Converted some internal references to the new macros.
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diff
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1317 (cf. Sec. |
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1318 .Cf content-md5 ) |
95
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1319 .P |
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diff
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|
1320 The |
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1321 .Sw -[no]ebcdicsafe |
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diff
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1322 and |
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1323 .Sw -[no]rfc934mode |
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1324 switches of |
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diff
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|
1325 .Pn mhbuild |
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1326 were removed because they are considered obsolete. |
97
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1327 .Ci 01a3480928da485b4d6109d36d751dfa71799d58 |
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diff
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1328 .Ci 3363e2624dce0eb8164cf8b3f1ab385c8ff72e88 |
95
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1329 .P |
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1330 Content caching of external MIME parts, activated with the |
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diff
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|
1331 .Sw -rcache |
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More text about switches.
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diff
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|
1332 and |
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markus schnalke <meillo@marmaro.de>
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diff
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|
1333 .Sw -wcache |
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diff
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|
1334 switches was completely removed. |
97
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diff
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1335 .Ci d1fefd9f614e4dc3cda16da6c69133c1b2005269 |
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diff
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1336 External MIME parts are rare today, having a caching facility |
159
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1337 for them appears to be unnecessary. |
95
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|
1338 .P |
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diff
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|
1339 In pre-MIME times, |
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diff
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|
1340 .Pn mhl |
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diff
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|
1341 had covered many tasks that are part of MIME handling today. |
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diff
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|
1342 Therefore, |
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diff
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|
1343 .Pn mhl |
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diff
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|
1344 could be simplified to a large extend, reducing the number of its |
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diff
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1345 switches from 21 to 6. |
97
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1346 .Ci 350ad6d3542a07639213cf2a4fe524e829c1e7b6 |
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diff
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1347 .Ci 0e46503be3c855bddaeae3843e1b659279c35d70 |
95
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diff
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|
1348 |
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diff
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|
1349 |
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diff
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|
1350 |
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diff
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|
1351 |
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diff
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|
1352 .U3 "Header Printing |
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diff
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|
1353 .P |
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diff
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|
1354 .Pn folder 's |
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diff
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|
1355 data output is self-explaining enough that |
159
8b411125645d
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diff
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1356 displaying the header line makes little sense. |
95
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diff
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|
1357 Hence, the |
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diff
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1358 .Sw -[no]header |
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1359 switch was removed and headers are never printed. |
97
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diff
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1360 .Ci 601cc73d1fa05ce96faa728f036d6c51b91701c7 |
95
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diff
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|
1361 .P |
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diff
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|
1362 In |
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diff
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|
1363 .Pn mhlist , |
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diff
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|
1364 the |
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diff
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1365 .Sw -[no]header |
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1366 switches were removed, too. |
97
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diff
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1367 .Ci b24f96523aaf60e44e04a3ffb1d22e69a13a602f |
95
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diff
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1368 But in this case headers are always printed, |
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1369 because the output is not self-explaining. |
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diff
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|
1370 .P |
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parents:
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diff
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|
1371 .Pn scan |
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markus schnalke <meillo@marmaro.de>
parents:
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diff
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|
1372 also had |
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diff
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|
1373 .Sw -[no]header |
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diff
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|
1374 switches. |
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parents:
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diff
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|
1375 Printing the header had been sensible until the introduction of |
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diff
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|
1376 format strings made it impossible to display the column headings. |
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1377 Only the folder name and the current date remained to be printed. |
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diff
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1378 As this information can be perfectly retrieved by |
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diff
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|
1379 .Pn folder |
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parents:
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diff
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|
1380 and |
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parents:
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diff
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|
1381 .Pn date , |
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diff
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|
1382 consequently, the switches were removed. |
97
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|
1383 .Ci c477dc5d1d03fa6d9a8ab3dd3508c63cbddc044e |
95
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diff
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|
1384 .P |
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diff
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|
1385 By removing all |
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markus schnalke <meillo@marmaro.de>
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diff
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|
1386 .Sw -header |
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diff
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|
1387 switches, the collision with |
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diff
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|
1388 .Sw -help |
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diff
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|
1389 on the first two letters was resolved. |
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diff
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|
1390 Currently, |
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diff
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|
1391 .Sw -h |
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diff
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|
1392 evaluates to |
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diff
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|
1393 .Sw -help |
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diff
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|
1394 for all tools of mmh. |
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|
1395 |
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|
1396 |
139
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Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
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|
1397 .U3 "Suppressing Edits or the Invocation of the WhatNow Shell |
95
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diff
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1398 .P |
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diff
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|
1399 The |
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|
1400 .Sw -noedit |
100
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Included changes proposed by Lydi.
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diff
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|
1401 switch of |
95
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diff
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|
1402 .Pn comp , |
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diff
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|
1403 .Pn repl , |
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More text about switches.
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diff
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|
1404 .Pn forw , |
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More text about switches.
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diff
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|
1405 .Pn dist , |
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More text about switches.
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93
diff
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|
1406 and |
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More text about switches.
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diff
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|
1407 .Pn whatnow |
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diff
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|
1408 was removed, but it can now be replaced by specifying |
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More text about switches.
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diff
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|
1409 .Sw -editor |
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diff
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|
1410 with an empty argument. |
97
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Added references to commits.
markus schnalke <meillo@marmaro.de>
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96
diff
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|
1411 .Ci 75fca31a5b9d5c1a99c74ab14c94438d8852fba9 |
95
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1412 (Specifying |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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parents:
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diff
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|
1413 .Cl "-editor /bin/true |
95
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93
diff
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|
1414 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:
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diff
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|
1415 .P |
95
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More text about switches.
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diff
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|
1416 The more important change is the removal of the |
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|
1417 .Sw -nowhatnowproc |
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|
1418 switch. |
97
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Added references to commits.
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parents:
96
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|
1419 .Ci ee4f43cf2ef0084ec698e4e87159a94c01940622 |
95
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1420 This switch had introduced an awkward behavior, as explained in nmh's |
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More text about switches.
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|
1421 man page for |
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93
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|
1422 .Mp comp (1): |
98
d894191d7a33
style: Changed the block quote approach. New QS and QE.
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diff
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|
1423 .QS |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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|
1424 The |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
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diff
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|
1425 .Sw -editor |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1426 .Ar editor |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
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diff
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|
1427 switch indicates the editor to use for |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
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diff
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|
1428 the initial edit. Upon exiting from the editor, |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
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diff
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|
1429 .Pn comp |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1430 will invoke the |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1431 .Pn whatnow |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1432 program. See |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
159
diff
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|
1433 .Mp whatnow (1) |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
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diff
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|
1434 for a discussion of available options. |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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|
1435 The invocation of this program can be |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
159
diff
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|
1436 inhibited by using the |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
159
diff
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|
1437 .Sw -nowhatnowproc |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
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diff
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|
1438 switch. (In truth of fact, it is the |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
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diff
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|
1439 .Pn whatnow |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
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|
1440 program which starts the initial edit. |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
159
diff
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|
1441 Hence, |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
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|
1442 .Sw -nowhatnowproc |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
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diff
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|
1443 will prevent any edit from occurring.) |
98
d894191d7a33
style: Changed the block quote approach. New QS and QE.
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parents:
97
diff
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|
1444 .QE |
95
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1445 .P |
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More text about switches.
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parents:
93
diff
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|
1446 Effectively, the |
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More text about switches.
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parents:
93
diff
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|
1447 .Sw -nowhatnowproc |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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parents:
98
diff
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|
1448 switch creates only a draft message. |
95
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1449 As |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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parents:
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diff
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|
1450 .Cl "-whatnowproc /bin/true |
95
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1451 causes the same behavior, the |
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More text about switches.
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parents:
93
diff
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|
1452 .Sw -nowhatnowproc |
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1453 switch was removed for being redundant. |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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parents:
98
diff
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|
1454 Likely, the |
95
edac7e46a9f2
More text about switches.
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parents:
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diff
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|
1455 .Sw -nowhatnowproc |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
98
diff
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|
1456 switch was intended to be used by front-ends. |
95
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1457 |
edac7e46a9f2
More text about switches.
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parents:
93
diff
changeset
|
1458 |
edac7e46a9f2
More text about switches.
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parents:
93
diff
changeset
|
1459 |
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1460 .U3 "Various |
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1461 .BU |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
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diff
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|
1462 With the removal of MMDF maildrop format support, |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1463 .Pn packf |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1464 and |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
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|
1465 .Pn rcvpack |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1466 no longer needed their |
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Removed and moved some paragraphs.
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diff
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|
1467 .Sw -mbox |
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Removed and moved some paragraphs.
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parents:
138
diff
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|
1468 and |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1469 .Sw -mmdf |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1470 switches. |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1471 .Sw -mbox |
154
63e885fb48ba
Converted some internal references to the new macros.
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parents:
145
diff
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|
1472 is the sole behavior now. |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
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diff
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|
1473 .Ci 3916ab66ad5d183705ac12357621ea8661afd3c0 |
171
346ff7e201f5
Applied suggestions by Boris.
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parents:
169
diff
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|
1474 Further rework in both tools made the |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1475 .Sw -file |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
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|
1476 switch unnecessary. |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
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diff
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|
1477 .Ci ca1023716d4c2ab890696f3e41fa0d94267a940e |
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Removed and moved some paragraphs.
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parents:
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diff
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|
1478 |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
changeset
|
1479 .BU |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
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|
1480 Mmh's tools will no longer clear the screen (\c |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1481 .Pn scan 's |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1482 and |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
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|
1483 .Pn mhl 's |
b7b81ae9c9d8
Removed and moved some paragraphs.
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138
diff
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|
1484 .Sw -[no]clear |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
changeset
|
1485 switches |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
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|
1486 .Ci e57b17343dcb3ff373ef4dd089fbe778f0c7c270 |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1487 .Ci 943765e7ac5693ae177fd8d2b5a2440e53ce816e ). |
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Removed and moved some paragraphs.
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parents:
138
diff
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|
1488 Neither will |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1489 .Pn mhl |
b7b81ae9c9d8
Removed and moved some paragraphs.
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138
diff
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|
1490 ring the bell (\c |
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Removed and moved some paragraphs.
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parents:
138
diff
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|
1491 .Sw -[no]bell |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1492 .Ci e11983f44e59d8de236affa5b0d0d3067c192e24 ) |
b7b81ae9c9d8
Removed and moved some paragraphs.
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138
diff
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|
1493 nor page the output itself (\c |
b7b81ae9c9d8
Removed and moved some paragraphs.
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138
diff
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|
1494 .Sw -length |
b7b81ae9c9d8
Removed and moved some paragraphs.
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138
diff
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|
1495 .Ci 5b9d883db0318ed2b84bb82dee880d7381f99188 ). |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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diff
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|
1496 .\" XXX Ref |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
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138
diff
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|
1497 Generally, the pager to use is no longer specified with the |
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Removed and moved some paragraphs.
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138
diff
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|
1498 .Sw -[no]moreproc |
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Removed and moved some paragraphs.
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parents:
138
diff
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|
1499 command line switches for |
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Removed and moved some paragraphs.
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138
diff
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|
1500 .Pn mhl |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1501 and |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1502 .Pn show /\c |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1503 .Pn mhshow . |
b7b81ae9c9d8
Removed and moved some paragraphs.
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138
diff
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|
1504 .Ci 39e87a75b5c2d3572ec72e717720b44af291e88a |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
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diff
changeset
|
1505 |
b7b81ae9c9d8
Removed and moved some paragraphs.
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parents:
138
diff
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|
1506 .BU |
96 | 1507 In order to avoid prefix collisions among switch names, the |
95
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More text about switches.
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diff
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|
1508 .Sw -version |
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More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1509 switch was renamed to |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1510 .Sw -Version |
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More text about switches.
markus schnalke <meillo@marmaro.de>
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93
diff
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|
1511 (with capital `V'). |
97
29a7454fcded
Added references to commits.
markus schnalke <meillo@marmaro.de>
parents:
96
diff
changeset
|
1512 .Ci 32b2354dbaf4bf934936eb5b102a4a3d2fdd209a |
95
edac7e46a9f2
More text about switches.
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diff
changeset
|
1513 Every program has the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1514 .Sw -version |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1515 switch but its first three letters collided with the |
edac7e46a9f2
More text about switches.
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93
diff
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|
1516 .Sw -verbose |
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markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1517 switch, present in many programs. |
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More text about switches.
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93
diff
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|
1518 The rename solved this problem once for all. |
edac7e46a9f2
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93
diff
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|
1519 Although this rename breaks a basic interface, having the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1520 .Sw -V |
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More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1521 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
|
1522 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1523 .BU |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
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|
1524 .Sw -[no]preserve |
edac7e46a9f2
More text about switches.
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parents:
93
diff
changeset
|
1525 of |
edac7e46a9f2
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parents:
93
diff
changeset
|
1526 .Pn refile |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
1527 was removed |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
1528 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173 |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
1529 because what use was it anyway? |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
1530 Quoting nmh's man page |
165
ea6eec1722d1
Improvement by Boris Kraut.
markus schnalke <meillo@marmaro.de>
parents:
164
diff
changeset
|
1531 .Mp refile (1): |
98
d894191d7a33
style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents:
97
diff
changeset
|
1532 .QS |
95
edac7e46a9f2
More text about switches.
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parents:
93
diff
changeset
|
1533 Normally when a message is refiled, for each destination |
edac7e46a9f2
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markus schnalke <meillo@marmaro.de>
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93
diff
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|
1534 folder it is assigned the number which is one above the current |
edac7e46a9f2
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markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1535 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
|
1536 .Sw -preserv |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1537 [sic!] switch will override this message renaming, and try |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1538 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
|
1539 particular folder occurs when using the |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1540 .Sw -preserve |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1541 switch, then |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1542 .Pn refile |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1543 will use the next available message number which |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1544 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
|
1545 .QE |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1546 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1547 .BU |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1548 The removal of the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1549 .Sw -[no]reverse |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1550 switches of |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1551 .Pn scan |
97
29a7454fcded
Added references to commits.
markus schnalke <meillo@marmaro.de>
parents:
96
diff
changeset
|
1552 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1553 is a bug fix, supported by the comments |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1554 ``\-[no]reverse under #ifdef BERK (I really HATE this)'' |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1555 by Rose and |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1556 ``Lists messages in reverse order with the `\-reverse' switch. |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1557 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
|
1558 .\" XXX Ref: welche datei genau. |
97
29a7454fcded
Added references to commits.
markus schnalke <meillo@marmaro.de>
parents:
96
diff
changeset
|
1559 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
|
1560 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
|
1561 thereafter. |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
1562 |
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
1563 |
93
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1564 .ig |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
1565 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1566 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
|
1567 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1568 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
|
1569 |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1570 mhmail: resent queued |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1571 inc: snoop, (pop) |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1572 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1573 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
|
1574 [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
|
1575 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1576 prompter: [no]doteof |
93
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1577 |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1578 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
|
1579 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1580 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
|
1581 [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
|
1582 attach attachformat |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1583 whatnow: (noedit) attach |
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 slocal: [no]suppressdups |
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 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
|
1588 [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
|
1589 |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1590 whom: ??? |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1591 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1592 .. |
93
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1593 |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1594 |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1595 .ig |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1596 |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1597 .P |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
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parents:
89
diff
changeset
|
1598 In the best case, all switches are unambiguous on the first character, |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
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parents:
89
diff
changeset
|
1599 or on the three-letter prefix for the `no' variants. |
96 | 1600 Reducing switch prefix collisions, shortens the necessary prefix length |
93
093ccf39a45e
Write text about removal of switches; Included the grap figure.
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parents:
89
diff
changeset
|
1601 the user must type. |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
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parents:
89
diff
changeset
|
1602 Having less switches helps best. |
093ccf39a45e
Write text about removal of switches; Included the grap figure.
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parents:
89
diff
changeset
|
1603 |
093ccf39a45e
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markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1604 .. |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
1605 |
95
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1606 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1607 .\" XXX: whatnow prompt commands |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1608 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1609 |
95
edac7e46a9f2
More text about switches.
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parents:
93
diff
changeset
|
1610 |
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1611 |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
1612 .\" -------------------------------------------------------------- |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
1613 .H1 "Modernizing |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1614 .P |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1615 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
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|
1616 increasingly extended. |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
1617 New features entered the project and became alternatives to the |
48e28eaee6f9
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116
diff
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|
1618 existing behavior. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
diff
changeset
|
1619 Relicts from several decades have gathered in the code base, |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
diff
changeset
|
1620 but seldom obsolete features were dropped. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
diff
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|
1621 This section describes the removing of old code |
48e28eaee6f9
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parents:
116
diff
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|
1622 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
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|
1623 It focuses on the functional aspect only; |
154
63e885fb48ba
Converted some internal references to the new macros.
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parents:
145
diff
changeset
|
1624 the non-functional aspects of code style are discussed in Sec. |
63e885fb48ba
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1625 .Cf code-style . |
58
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1626 |
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1627 |
100
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1628 .H2 "Code Relicts |
12
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1629 .P |
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1630 My position regarding the removal of obsolete functions of mmh, |
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1631 .\" XXX ``in order to remove old code,'' |
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1632 is much more revolutional than the nmh community appreciates. |
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1633 Working on an experimental version, I was quickly able to drop |
104 | 1634 functionality I considered ancient. |
1635 The need for consensus with peers would have slowed this process down. | |
1636 Without the need to justify my decisions, I was able to rush forward. | |
110 | 1637 In December 2011, Paul Vixie motivated the nmh developers to just |
159
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1638 .\" XXX ugs |
104 | 1639 do the work: |
1640 .[ | |
1641 paul vixie edginess nmh-workers | |
1642 .] | |
1643 .QS | |
1644 let's stop walking on egg shells with this code base. there's no need to | |
1645 discuss whether to keep using vfork, just note in [sic!] passing, [...] | |
1646 we don't need a separate branch for removing vmh | |
1647 or ridding ourselves of #ifdef's or removing posix replacement functions | |
164
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1648 or depending on pure ansi/posix ``libc''. |
104 | 1649 .QP |
164
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1650 these things should each be a day or two of work and the ``main branch'' |
104 | 1651 should just be modern. [...] |
1652 let's push forward, aggressively. | |
1653 .QE | |
1654 .LP | |
1655 I did so already in the months before. | |
1656 I pushed forward. | |
159
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1657 .\" XXX semicolon ? |
104 | 1658 I simply dropped the cruft. |
1659 .P | |
1660 The decision to drop a feature was based on literature research and | |
159
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1661 careful thinking, but whether having had contact with this particular |
104 | 1662 feature within my own computer life served as a rule of thumb. |
159
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1663 I explained my reasons in the commit messages |
109
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1664 in the version control system. |
104 | 1665 Hence, others can comprehend my view and argue for undoing the change |
1666 if I have missed an important aspect. | |
109
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1667 I was quick in dropping parts. |
179
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1668 I rather include falsely dropped parts again, than going at a slower pace. |
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1669 Mmh is experimental work; it requires tough decisions. |
159
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1670 .\" XXX ``exp. work'' schon oft gesagt |
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1671 |
102
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More text about attachments mainly, plus some rearrangements.
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1672 |
104 | 1673 .U3 "Forking |
0
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1674 .P |
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1675 Being a tool chest, MH creates many processes. |
104 | 1676 In earlier times |
1677 .Fu fork() | |
1678 had been an expensive system call, because the process's image needed | |
159
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1679 to be completely duplicated at once. |
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1680 This expensive work was especially unnecessary in the commonly occuring |
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1681 case wherein the image is replaced by a call to |
104 | 1682 .Fu exec() |
1683 right after having forked the child process. | |
1684 The | |
1685 .Fu vfork() | |
1686 system call was invented to speed up this particular case. | |
1687 It completely omits the duplication of the image. | |
1688 On old systems this resulted in significant speed ups. | |
1689 Therefore MH used | |
1690 .Fu vfork() | |
1691 whenever possible. | |
12
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1692 .P |
104 | 1693 Modern memory management units support copy-on-write semantics, which make |
1694 .Fu fork() | |
1695 almost as fast as | |
1696 .Fu vfork() . | |
1697 The man page of | |
1698 .Mp vfork (2) | |
1699 in FreeBSD 8.0 states: | |
1700 .QS | |
1701 This system call will be eliminated when proper system sharing mechanisms | |
1702 are implemented. Users should not depend on the memory sharing semantics | |
1703 of vfork() as it will, in that case, be made synonymous to fork(2). | |
1704 .QE | |
1705 .LP | |
1706 Vixie supports the removal with the note that ``the last | |
1707 system on which fork was so slow that an mh user would notice it, was | |
1708 Eunice. that was 1987''. | |
1709 .[ | |
1710 nmh-workers vixie edginess | |
1711 .] | |
1712 I replaced all calls to | |
1713 .Fu vfork() | |
1714 with calls to | |
1715 .Fu fork() . | |
109
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1716 .Ci 40821f5c1316e9205a08375e7075909cc9968e7d |
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1717 .P |
104 | 1718 Related to the costs of |
1719 .Fu fork() | |
1720 is the probability of its success. | |
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1721 In the eighties, on heavy loaded systems, calls to |
104 | 1722 .Fu fork() |
1723 were prone to failure. | |
1724 Hence, many of the | |
1725 .Fu fork() | |
1726 calls in the code were wrapped into loops to retry the | |
1727 .Fu fork() | |
159
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1728 several times, to increase the chances to succeed, eventually. |
109
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1729 On modern systems, a failing |
104 | 1730 .Fu fork() |
109
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1731 call is unusual. |
104 | 1732 Hence, in the rare case when |
1733 .Fu fork() | |
1734 fails, mmh programs simply abort. | |
109
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1735 .Ci 5fbf37ee68e018998ada61eeab73e035b26834b6 |
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1736 |
104 | 1737 |
109
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1738 .U3 "Header Fields |
104 | 1739 .BU |
84
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1740 The |
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1741 .Hd Encrypted |
104 | 1742 header field was introduced by RFC\|822, |
109
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1743 but already marked as legacy in RFC\|2822. |
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1744 Today, OpenPGP provides the basis for standardized exchange of encrypted |
104 | 1745 messages [RFC\|4880, RFC\|3156]. |
109
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1746 Hence, the support for |
104 | 1747 .Hd Encrypted |
1748 header fields is removed in mmh. | |
109
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1749 .Ci 064527f7b57ab050e5af13e15ad99aeeab125857 |
104 | 1750 .BU |
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1751 The native support for |
84
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1752 .Hd Face |
104 | 1753 header fields has been removed, as well. |
109
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1754 .Ci 8e5be81f784682822f5e868c1bf3c8624682bd23 |
104 | 1755 This feature is similar to the |
84
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1756 .Hd X-Face |
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1757 header field in its intent, |
21
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diff
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|
1758 but takes a different approach to store the image. |
84
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|
1759 Instead of encoding the image data directly into the header field, |
109
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1760 it contains the hostname and UDP port where the image |
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1761 date can be retrieved. |
159
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1762 There is even a third Face system, |
109
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1763 which is the successor of |
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1764 .Hd X-Face , |
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1765 although it re-uses the |
84
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|
1766 .Hd Face |
109
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|
1767 header field. |
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1768 It was invented in 2005 and supports colored PNG images. |
104 | 1769 None of the Face systems described here is popular today. |
1770 Hence, mmh has no direct support for them. | |
1771 .BU | |
154
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1772 .Id content-md5 |
104 | 1773 The |
1774 .Hd Content-MD5 | |
1775 header field was introduced by RFC\|1864. | |
1776 It provides detection of data corruption during the transfer. | |
1777 But it can not ensure verbatim end-to-end delivery of the contents | |
1778 [RFC\|1864]. | |
1779 The proper approach to verify content integrity in an | |
166
f102dcc06bb9
s/digital cryptography/signing and encryption/
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1780 end-to-end relationship is the use of digital signatures. |
104 | 1781 .\" XXX (RFCs FIXME). |
1782 On the other hand, transfer protocols should detect corruption during | |
109
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1783 the transmission. |
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1784 The TCP includes a checksum field therefore. |
104 | 1785 These two approaches in combinations render the |
1786 .Hd Content-MD5 | |
1787 header field superfluous. | |
109
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1788 Not a single one out of 4\|200 messages from two decades |
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1789 in an nmh-workers mailing list archive contains a |
84
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1790 .Hd Content-MD5 |
104 | 1791 header field. |
1792 Neither did any of the 60\|000 messages in my personal mail storage. | |
1793 Removing the support for this header field, | |
1794 removed the last place where MD5 computation was needed. | |
109
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1795 .Ci 31dc797eb5178970d68962ca8939da3fd9a8efda |
104 | 1796 Hence, the MD5 code could be removed as well. |
1797 Over 500 lines of code vanished by this one change. | |
1798 | |
1799 | |
1800 .U3 "MMDF maildrop support | |
1801 .P | |
1802 This type of format is conceptionally similar to the mbox format, | |
139
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1803 but uses a different message delimiter (`\fL\\1\\1\\1\\1\fP', |
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1804 commonly written as `\fL^A^A^A^A\fP', instead of `\fLFrom\0\fP'). |
104 | 1805 Mbox is the de-facto standard maildrop format on Unix, |
159
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1806 whereas the MMDF maildrop format is now forgotten. |
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1807 By dropping the MMDF maildrop format support, |
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1808 mbox became the only packed mailbox format supported in mmh. |
104 | 1809 .P |
109
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1810 The simplifications within the code were moderate. |
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1811 Mainly, the reading and writing of MMDF mailbox files was removed. |
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1812 But also, switches of |
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1813 .Pn packf |
104 | 1814 and |
109
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1815 .Pn rcvpack |
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1816 could be removed. |
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1817 .Ci 3916ab66ad5d183705ac12357621ea8661afd3c0 |
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1818 In the message parsing function |
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1819 .Fn sbr/m_getfld.c , |
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1820 knowledge of MMDF packed mail boxes was removed. |
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1821 .Ci 684ec30d81e1223a282764452f4902ed4ad1c754 |
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1822 Further code structure simplifications may be possible there, |
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1823 because only one single packed mailbox format is left to be supported. |
104 | 1824 I have not worked on them yet because |
1825 .Fu m_getfld() | |
1826 is heavily optimized and thus dangerous to touch. | |
1827 The risk of damaging the intricate workings of the optimized code is | |
1828 too high. | |
1829 | |
12
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1830 |
101
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1831 .U3 "Prompter's Control Keys |
20
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|
1832 .P |
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|
1833 The program |
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|
1834 .Pn prompter |
104 | 1835 queries the user to fill in a message form. |
1836 When used by | |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1837 .Pn comp |
104 | 1838 as |
1839 .Cl "comp -editor prompter" , | |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1840 the resulting behavior is similar to |
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1841 .Pn mailx . |
51 | 1842 Apparently, |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1843 .Pn prompter |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
1844 had not been touched lately. |
104 | 1845 Otherwise it's hardly explainable why it |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1846 still offered the switches |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
1847 .Sw -erase |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
1848 .Ar chr |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1849 and |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
1850 .Sw -kill |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
1851 .Ar chr |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1852 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
|
1853 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
|
1854 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
|
1855 with the standard tool |
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1856 .Pn stty . |
104 | 1857 The switches are removed now |
1858 .Ci 0bd9750710cdbab80cfb4036dd87af20afe1552f . | |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1859 |
104 | 1860 |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1861 .U3 "Hardcopy Terminal Support |
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 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
|
1864 hardcopy terminal. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1865 It remained in the code until spring 2012, when I finally removed it |
104 | 1866 .Ci b7764c4a6b71d37918a97594d866258f154017ca . |
21
bb8a8be49024
Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents:
20
diff
changeset
|
1867 .P |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1868 The check only prevented a pager to be placed between the printing |
104 | 1869 program (\c |
1870 .Pn mhl ) | |
1871 and the terminal. | |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1872 In nmh, this could have been ensured statically with the |
104 | 1873 .Sw -nomoreproc |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1874 at the command line, too. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
1875 In mmh, setting the profile entry |
104 | 1876 .Pe Pager |
1877 or the environment variable | |
1878 .Ev PAGER | |
1879 to | |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1880 .Pn cat |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1881 is sufficient. |
104 | 1882 |
1883 | |
21
bb8a8be49024
Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents:
20
diff
changeset
|
1884 |
12
7ca384d68edc
Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents:
0
diff
changeset
|
1885 |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
1886 .H2 "Attachments |
22
99409e4546d2
Wrote about the removal of tools.
markus schnalke <meillo@marmaro.de>
parents:
21
diff
changeset
|
1887 .P |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1888 The mind model of email attachments is unrelated to MIME. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1889 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
|
1890 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
|
1891 attachment. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1892 Instead of attachments, MIME talks about ``multi-part message bodies'' |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1893 [RFC\|2045], a more general concept. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1894 Multi-part messages are messages |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1895 ``in which one or more different |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1896 sets of data are combined in a single body'' |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1897 [RFC\|2046]. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1898 MIME keeps its descriptions generic; |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1899 it does not imply specific usage models. |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1900 One usage model became prevalent: attachments. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1901 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
|
1902 attached to it. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1903 In MIME terms, this is a multi-part message having a text part first |
110 | 1904 and parts of arbitrary type following. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1905 .P |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1906 MH's MIME support is a direct implementation of the RFCs. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1907 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
|
1908 in MH's implementation. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1909 .\" XXX rewrite ``no idea''. |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1910 As a result, |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1911 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
|
1912 But users do not need all the MIME features, |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1913 they want convenient attachment handling. |
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1914 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1915 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1916 .U3 "Composing MIME Messages |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1917 .P |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1918 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
|
1919 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
|
1920 .Ci 7480dbc14bc90f2d872d434205c0784704213252 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1921 In the file |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1922 .Fn docs/README-ATTACHMENTS , |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1923 he described his motivation to do so as such: |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1924 .QS |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1925 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
|
1926 handing [sic!], the interface to this functionality is pretty obtuse. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1927 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
|
1928 .Pn mhbuild |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1929 composition files! |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1930 .QE |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1931 .LP |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1932 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
|
1933 In the same document: |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1934 .QS |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1935 These changes simplify the task of managing attachments on draft files. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1936 They allow attachments to be added, listed, and deleted. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1937 MIME messages are automatically created when drafts with attachments |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1938 are sent. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1939 .QE |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1940 .LP |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1941 Unfortunately, the attachment system, |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1942 like any new facilities in nmh, |
110 | 1943 was inactive by default. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1944 .P |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1945 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
|
1946 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
|
1947 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
|
1948 .[ |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1949 nmh-workers attachment proposal |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1950 .] |
110 | 1951 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
|
1952 .Ci 8ff284ff9167eff8f5349481529332d59ed913b1 |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1953 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
|
1954 Instead of command line switches, the |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1955 .Pe Attachment-Header |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1956 profile entry is used to specify |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1957 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
|
1958 It is pre-defined to |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1959 .Hd Attach . |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1960 .P |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1961 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
|
1962 .VS |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1963 To: bob |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1964 Subject: The file you wanted |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1965 Attach: /path/to/the/file-bob-wanted |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1966 -------- |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1967 Here it is. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1968 VE |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1969 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
|
1970 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>
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diff
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|
1971 non-interactively with |
101
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Wrote about attachments.
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diff
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|
1972 .Pn anno : |
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diff
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|
1973 .VS |
102
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101
diff
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|
1974 anno -append -nodate -component Attach -text /path/to/attachment |
101
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diff
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|
1975 VE |
102
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parents:
101
diff
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|
1976 Drafts with attachment headers are converted to MIME automatically by |
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101
diff
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|
1977 .Pn send . |
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diff
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|
1978 The conversion to MIME is invisible to the user. |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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parents:
157
diff
changeset
|
1979 The draft stored in the draft folder is always in source form with |
101
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parents:
100
diff
changeset
|
1980 attachment headers. |
179
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Applied further corrections by Aaron.
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parents:
178
diff
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|
1981 If the MIMEification fails (e.g. because the file to attach |
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Applied further corrections by Aaron.
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parents:
178
diff
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|
1982 is not accessible) the original draft is not changed. |
101
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parents:
100
diff
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|
1983 .P |
102
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101
diff
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|
1984 The attachment system handles the forwarding of messages, too. |
173
4c7db172fb59
Various corrections and improvements.
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171
diff
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|
1985 If the attachment header value starts with a plus character (`\fL+\fP'), |
101
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markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1986 like in |
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markus schnalke <meillo@marmaro.de>
parents:
100
diff
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|
1987 .Cl "Attach: +bob 30 42" , |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
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diff
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|
1988 the given messages in the specified folder will be attached. |
101
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Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1989 This allowed to simplify |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1990 .Pn forw . |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1991 .Ci f41f04cf4ceca7355232cf7413e59afafccc9550 |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1992 .P |
e8e6adb14beb
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markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1993 Closely related to attachments is non-ASCII text content, |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1994 because it requires MIME too. |
102
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markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1995 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
|
1996 to have the draft converted to MIME. |
102
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markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
1997 This was necessary whenever the draft contained non-ASCII characters. |
101
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markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1998 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
|
1999 Therefore, the |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2000 .Pe automimeproc |
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Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2001 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
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|
2002 automatically each time. |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
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|
2003 Unfortunately, this approach conflicted with the attachment system |
101
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markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2004 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
|
2005 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
|
2006 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
|
2007 WhatNow prompt and |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2008 .Pe automimeproc |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2009 must not be set in the profile. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2010 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
|
2011 not caught. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
2012 All in all, the solution was complex and irritating. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2013 My patch from December 2010 |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2014 .[ |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2015 nmh-workers attachment proposal |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2016 .] |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2017 would have simplified the situation. |
102
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More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2018 .P |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2019 Mmh's current solution is even more elaborate. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2020 Any necessary MIMEification is done automatically. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2021 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
|
2022 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
|
2023 attachment header or non-ASCII text is present. |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
2024 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
|
2025 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
|
2026 .\" XXX REF ? |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2027 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
|
2028 .P |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2029 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
|
2030 compositions directly, the full power of |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2031 .Pn mhbuild |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2032 can still be accessed. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2033 Given no attachment headers are included, the user can create |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2034 .Pn mhbuild |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2035 composition drafts like in nmh. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2036 Then, at the WhatNow prompt, he needs to invoke |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2037 .Cl "edit mhbuild |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2038 to convert it to MIME. |
110 | 2039 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
|
2040 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
|
2041 .P |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2042 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
|
2043 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
|
2044 This case was simplified. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2045 |
112
4e6a9ae1b53c
Added a bit of text on modern defaults; plus added code refs.
markus schnalke <meillo@marmaro.de>
parents:
110
diff
changeset
|
2046 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2047 .U3 "MIME Type Guessing |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2048 .P |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2049 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
|
2050 .Pn mhbuild |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2051 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
|
2052 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
|
2053 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
|
2054 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
|
2055 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
|
2056 partly intelligent work. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2057 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
|
2058 forces him to do partly mechanical work. |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
2059 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
|
2060 content. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2061 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
|
2062 .P |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2063 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
|
2064 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
|
2065 for the common cases. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2066 Mmh implements this approach in the |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2067 .Pn print-mimetype |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2068 script. |
112
4e6a9ae1b53c
Added a bit of text on modern defaults; plus added code refs.
markus schnalke <meillo@marmaro.de>
parents:
110
diff
changeset
|
2069 .Ci 4b5944268ea0da7bb30598a27857304758ea9b44 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2070 Using it is the default choice. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2071 .P |
112
4e6a9ae1b53c
Added a bit of text on modern defaults; plus added code refs.
markus schnalke <meillo@marmaro.de>
parents:
110
diff
changeset
|
2072 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
|
2073 .Pn file . |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2074 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
|
2075 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
|
2076 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
|
2077 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
|
2078 It varies much. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2079 Nevertheless, modern versions of GNU |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2080 .Pn file , |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2081 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
|
2082 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
|
2083 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
|
2084 it solves the difficult problem well. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2085 On systems where GNU |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2086 .Pn file , |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2087 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
|
2088 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
|
2089 .Ci 3baec236a39c5c89a9bda8dbd988d643a21decc6 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2090 .VS |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2091 Mime-Type-Query: file -b --mime |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2092 VE |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2093 .LP |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2094 Other versions of |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2095 .Pn file |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2096 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
|
2097 The diversity among |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2098 .Pn file |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2099 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
|
2100 .P |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2101 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
|
2102 `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
|
2103 `application/octet-stream'. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2104 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
|
2105 for a specific file. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2106 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
|
2107 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
|
2108 I consider both cases impractical. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2109 The existing solution should be sufficient. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2110 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
|
2111 .Pn mhbuild |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2112 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
|
2113 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2114 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2115 .U3 "Storing Attachments |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2116 .P |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
2117 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
|
2118 .Pn mhstore . |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2119 The program has two operation modes, |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2120 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2121 and |
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 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
|
2124 MIME part's meta information, if available. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2125 This naming information is usually available for modern attachments. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2126 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
|
2127 .Sw -noauto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2128 would have been specified. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2129 In the |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2130 .Sw -noauto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2131 mode, the parts are processed according to rules, defined by |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2132 .Pe mhstore-store-* |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2133 profile entries. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2134 These rules define generic filename templates for storing |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2135 or commands to post-process the contents in arbitrary ways. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2136 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
|
2137 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
|
2138 .P |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2139 The |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2140 .Sw -noauto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2141 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
|
2142 in contrast to the |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2143 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2144 mode. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2145 In mmh, |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2146 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2147 is not dangerous anymore. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2148 Two changes were necessary: |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2149 .LI 1 |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2150 Any directory path is removed from the proposed filename. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2151 Thus, the files are always stored in the expected directory. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2152 .Ci 41b6eadbcecf63c9a66aa5e582011987494abefb |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2153 .LI 2 |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2154 Tar files are not extracted automatically any more. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2155 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
|
2156 .Ci 94c80042eae3383c812d9552089953f9846b1bb6 |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2157 .LP |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2158 Now, the outcome of mmh's |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2159 .Cl "mhstore -auto |
110 | 2160 can be foreseen from the output of |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2161 .Cl "mhlist -verbose" . |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2162 .P |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2163 The |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2164 .Sw -noauto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2165 mode is seen to be more powerful but less convenient. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2166 On the other hand, |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2167 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2168 is safe now and |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2169 storing attachments under their original name is intuitive. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2170 Hence, |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2171 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2172 serves better as the default option. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2173 .Ci 3410b680416c49a7617491af38bc1929855a331d |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2174 .P |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2175 Files are stored into the directory given by the |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2176 .Pe Nmh-Storage |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2177 profile entry, if set, or |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2178 into the current working directory, otherwise. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2179 Storing to different directories is only possible with |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2180 .Pe mhstore-store-* |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2181 profile entries. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2182 .P |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2183 Still, in both modes, existing files get overwritten silently. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2184 This can be considered a bug. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2185 Yet, each other behavior has its draw-backs, too. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2186 Refusing to replace files requires adding a |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2187 .Sw -force |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2188 option. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2189 Users will likely need to invoke |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2190 .Pn mhstore |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2191 a second time with |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2192 .Sw -force . |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2193 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
|
2194 This requires interaction, which I like to avoid if possible. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2195 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
|
2196 For now, the behavior remains as it is. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2197 .P |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2198 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
|
2199 .Pn mhstore 's |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2200 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2201 mode. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2202 Instead of storing message/rfc822 parts as files to disk, |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2203 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
|
2204 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
|
2205 automatically reassembled beforehand. |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2206 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
|
2207 anymore. |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2208 Instead, information on how to retrieve them is output. |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2209 Not supporting this rare case saved nearly one thousand lines of code. |
dd5620bf8659
Wrote about storing attachments.
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diff
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|
2210 .Ci 55e1d8c654ee0f7c45b9361ce34617983b454c32 |
dd5620bf8659
Wrote about storing attachments.
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107
diff
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|
2211 .\" XXX mention somewhere else too: (The profile entry `nmh-access-ftp' |
dd5620bf8659
Wrote about storing attachments.
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107
diff
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|
2212 .\" and sbr/ruserpass.c for reading ~/.netrc are gone now.) |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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parents:
157
diff
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|
2213 `application/octet-stream; type=tar' is not special anymore. |
108
dd5620bf8659
Wrote about storing attachments.
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parents:
107
diff
changeset
|
2214 Automatically extracting such MIME parts had been the dangerous part |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2215 of the |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2216 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2217 mode. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2218 .Ci 94c80042eae3383c812d9552089953f9846b1bb6 |
dd5620bf8659
Wrote about storing attachments.
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parents:
107
diff
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|
2219 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2220 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2221 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
2222 .U3 "Showing MIME Messages |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
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101
diff
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|
2223 .P |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2224 The program |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2225 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
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|
2226 had been written to display MIME messages. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2227 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
|
2228 Nmh's |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2229 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
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diff
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|
2230 handled each MIME part independently, presenting them separately |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
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|
2231 to the user. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2232 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
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|
2233 where displaying a message is seen to be a single, integrated operation. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2234 Today, email messages are expected to consist of a main text part |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
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|
2235 plus possibly attachments. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2236 They are not any more seen to be arbitrary MIME hierarchies with |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2237 information on how to display the individual parts. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2238 I adjusted |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2239 .Pn mhshow 's |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2240 behavior to the modern view on the topic. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2241 .P |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2242 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
|
2243 .Pn show |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2244 program, because it was not capable to display MIME messages |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2245 and is no longer part of mmh. |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
2246 .\" XXX ref to other section |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2247 Although |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2248 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2249 was renamed to |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2250 .Pn show |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2251 in mmh, this section uses the name |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2252 .Pn mhshow , |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2253 in order to avoid confusion. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2254 .P |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2255 In mmh, the basic idea is that |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2256 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2257 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
|
2258 Therefore, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2259 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2260 invokes a pager session for all its output, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2261 whenever it prints to a terminal. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2262 .Ci a4197ea6ffc5c1550e8b52d5a654bcaaaee04a4e |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2263 In consequence, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2264 .Pn mhl |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2265 does no more invoke a pager. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2266 .Ci 0e46503be3c855bddaeae3843e1b659279c35d70 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2267 With |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2268 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2269 replacing the original |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2270 .Pn show , |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2271 output from |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2272 .Pn mhl |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2273 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
|
2274 .Pn mhshow . |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2275 Hence, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2276 .Pn mhl |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2277 does not need to invoke a pager. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2278 The one and only job of |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2279 .Pn mhl |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2280 is to format messages or parts of them. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2281 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
|
2282 .Pn mhshow . |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2283 .P |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2284 .Pe mhshow-show-* |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2285 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
|
2286 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
|
2287 to display them in the terminal. |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
2288 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
|
2289 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
|
2290 is ignored. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2291 It is simply treated as `multipart/mixed'. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2292 .Ci d0581ba306a7299113a346f9b4c46ce97bc4cef6 |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2293 This could already be requested with the, now removed, |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2294 .Sw -serialonly |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2295 switch of |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2296 .Pn mhshow . |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
2297 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
|
2298 the `%e' escape in |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2299 .Pe mhshow-show-* |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2300 profile entries became useless and was thus removed. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2301 .Ci a20d405db09b7ccca74d3e8c57550883da49e1ae |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2302 .P |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2303 In the intended setup, only text content would be displayed. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2304 Non-text content would be converted to text by appropriate |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2305 .Pe mhshow-show-* |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2306 profile entries before, if possible and wanted. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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112
diff
changeset
|
2307 All output would be displayed in a single pager session. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2308 Other kinds of attachments are ignored. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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112
diff
changeset
|
2309 With |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2310 .Pe mhshow-show-* |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2311 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
|
2312 the message. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2313 For parallel display, the attachments need to be stored to disk first. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2314 .P |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2315 To display text content in foreign charsets, they need to be converted |
92cbd3fa1c40
Wrote text about displaying mime messages.
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112
diff
changeset
|
2316 to the native charset. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2317 Therefore, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2318 .Pe mhshow-charset-* |
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2319 profile entries used to be needed. |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
2320 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
|
2321 text through the |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
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parents:
112
diff
changeset
|
2322 .Pn iconv |
92cbd3fa1c40
Wrote text about displaying mime messages.
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112
diff
changeset
|
2323 command, if necessary. |
92cbd3fa1c40
Wrote text about displaying mime messages.
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112
diff
changeset
|
2324 .Ci 2433122c20baccb10b70b49c04c6b0497b5b3b60 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2325 Custom |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2326 .Pe mhshow-show-* |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2327 rules for textual content might need a |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2328 .Cl "iconv -f %c %f | |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2329 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
|
2330 .P |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
2331 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
|
2332 has improved, it is not consistent enough. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2333 Further work needs to be done and |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2334 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
|
2335 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
|
2336 correctly without the need to configure anything. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2337 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2338 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2339 .ig |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2340 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2341 .P |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2342 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
|
2343 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
|
2344 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
|
2345 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
|
2346 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
|
2347 it! |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2348 (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
|
2349 ~/.netrc are gone now.) |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2350 .Ci 55e1d8c654ee0f7c45b9361ce34617983b454c32 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2351 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2352 .. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2353 |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
2354 |
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
2355 |
166
f102dcc06bb9
s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents:
165
diff
changeset
|
2356 .H2 "Signing and Encrypting |
22
99409e4546d2
Wrote about the removal of tools.
markus schnalke <meillo@marmaro.de>
parents:
21
diff
changeset
|
2357 .P |
166
f102dcc06bb9
s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents:
165
diff
changeset
|
2358 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
|
2359 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
|
2360 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
|
2361 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
|
2362 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
|
2363 out-of-the-box. |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2364 Therefore, Neil Rickert's |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2365 .Pn mhsign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2366 and |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2367 .Pn mhpgp |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2368 scripts |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2369 .[ |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2370 neil rickert mhsign mhpgp |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2371 .] |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2372 were included into mmh |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2373 .Ci f45cdc98117a84f071759462c7ae212f4bc5ab2e |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2374 .Ci 58cf09aa36e9f7f352a127158bbf1c5678bc6ed8 . |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2375 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
|
2376 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
|
2377 Additionally, no licensing difficulties appeared, |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2378 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
|
2379 .P |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2380 .Pn mhsign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2381 handles the signing and encrypting part. |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2382 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
|
2383 .Pn gnupg |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2384 and |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2385 the MH system. |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2386 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
|
2387 .Pn send |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2388 invokes |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2389 .pn mhsign |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2390 automatically |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2391 .Ci c7b5e1df086bcc37ff40163ee67571f076cf6683 . |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2392 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
|
2393 If a draft contains the |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2394 .Hd Sign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2395 header field, |
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 will initiate the signing. |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2398 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
|
2399 .Pe Pgpkey |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2400 profile entry. |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2401 .Pn send |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2402 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
|
2403 but by manually invoking |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2404 .Pn mhsign , |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2405 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
|
2406 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
|
2407 .Hd Enc |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2408 header field. |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2409 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
|
2410 in a file called |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2411 .Fn pgpkeys , |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2412 which contains exceptions and overrides. |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2413 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
|
2414 .Pn mhsign |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2415 will refuse to encrypt it. |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2416 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
|
2417 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
|
2418 approach. |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2419 .P |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2420 .Pn mhpgp |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2421 is the companion to |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2422 .Pn mhsign . |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2423 It verifies signatures and decrypts messages. |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2424 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
|
2425 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
|
2426 Currently, |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2427 .Pn mhpgp |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2428 needs to be invoked manually. |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2429 The integration into |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2430 .Pn show |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2431 and |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2432 .Pn mhstore |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2433 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
|
2434 is planned but not realized yet. |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2435 .P |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2436 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
|
2437 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
|
2438 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
|
2439 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
|
2440 .P |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2441 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
|
2442 most recent features in mmh. |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2443 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
|
2444 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
|
2445 direct the further development of the facility. |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2446 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
|
2447 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
|
2448 .Sw -[no]sign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2449 and |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2450 .Sw -[no]enc |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2451 switches to |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2452 .Pn send , |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2453 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
|
2454 A profile entry: |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2455 .VS |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2456 send: -sign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2457 VE |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2458 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
|
2459 With the present approach, a |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2460 .Hd Send |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2461 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
|
2462 to achieve the same result. |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2463 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
|
2464 template files clean. |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2465 |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
2466 |
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
2467 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2468 |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2469 .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
|
2470 .P |
14
55ec590cfa07
Wrote about the draft folder.
markus schnalke <meillo@marmaro.de>
parents:
12
diff
changeset
|
2471 |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2472 .U3 "Draft Folder |
154
63e885fb48ba
Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents:
145
diff
changeset
|
2473 .Id draft-folder |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2474 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2475 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
|
2476 This is the file |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2477 .Fn draft |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2478 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
|
2479 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
|
2480 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
|
2481 the user had to decide among: |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2482 .LI 1 |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2483 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
|
2484 .LI 2 |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2485 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
|
2486 .LI 3 |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2487 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
|
2488 .LP |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2489 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
|
2490 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
|
2491 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
|
2492 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
|
2493 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
|
2494 help anything. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2495 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2496 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
|
2497 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
|
2498 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
|
2499 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
|
2500 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
|
2501 out-of-the-box. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2502 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
|
2503 .Mp mh-draft (5) |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2504 to better document the feature. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2505 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2506 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
|
2507 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
|
2508 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
|
2509 complex cases. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2510 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
|
2511 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
|
2512 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
|
2513 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
|
2514 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
|
2515 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
|
2516 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
|
2517 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
|
2518 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2519 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
|
2520 default name. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2521 I chose the name |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2522 .Fn +drafts |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2523 for obvious reasons. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2524 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
|
2525 .Sw -draftfolder |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2526 and |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2527 .Sw -draftmessage |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2528 could be removed. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2529 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
|
2530 new concept. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2531 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
|
2532 approaches. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2533 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
|
2534 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
|
2535 .Sw -draft |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2536 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
|
2537 special. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2538 It became indistinguishable to operating on any other message. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2539 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860 |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2540 .P |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2541 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
|
2542 .Ci 2d48b455c303a807041c35e4248955f8bec59eeb . |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2543 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
|
2544 Refiling drafts is without difference to refiling other messages. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2545 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
|
2546 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
|
2547 .Pn comp |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2548 still has |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2549 .Sw -[no]use |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2550 for switching between two modes: |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2551 .LI 1 |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2552 .Sw -use |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2553 to modify an existing draft. |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2554 .LI 2 |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2555 .Sw -nouse |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2556 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
|
2557 .LP |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2558 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
|
2559 .Pn comp |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2560 is deterministic. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2561 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2562 .Pn send |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2563 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
|
2564 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
|
2565 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
|
2566 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
|
2567 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
|
2568 .Pn send |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2569 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
|
2570 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2571 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
|
2572 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
|
2573 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
|
2574 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
|
2575 but applies them. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2576 .Cl "scan +drafts" , |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2577 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
|
2578 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
|
2579 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
|
2580 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
|
2581 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
|
2582 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
|
2583 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2584 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2585 .U3 "Trash Folder |
154
63e885fb48ba
Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents:
145
diff
changeset
|
2586 .Id trash-folder |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2587 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2588 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
|
2589 Historically, a message was ``deleted'' by prepending a specific |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
2590 \fIbackup prefix\fP, usually the comma character, |
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
2591 to the file name. |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2592 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
|
2593 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
|
2594 Although files remained in the file system, |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2595 the messages were no longer visible in MH. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2596 To truly delete them, a maintenance job was needed. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2597 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
|
2598 For instance: |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2599 .VS |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2600 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
|
2601 VE |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2602 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
|
2603 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
|
2604 backup prefix from the file name. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2605 But the user could not rely on this statement. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2606 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
|
2607 message |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2608 .Fn 6 , |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2609 became file |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2610 .Fn ,6 . |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2611 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
|
2612 the number one above the highest existing message number. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2613 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
|
2614 .Fn 6 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2615 then. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2616 If this new message would be removed as well, |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2617 then the backup of the former message is overwritten. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2618 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
|
2619 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
|
2620 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
|
2621 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
|
2622 ``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
|
2623 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
|
2624 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
|
2625 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
|
2626 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
|
2627 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
|
2628 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
|
2629 .P |
181
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
2630 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
|
2631 This complicates managing them. |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2632 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
|
2633 .Pn find , |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2634 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
|
2635 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
|
2636 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2637 The profile entry |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2638 .Pe rmmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2639 (previously named |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2640 .Pe Delete-Prog ) |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2641 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
|
2642 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
|
2643 the specified messages. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2644 This would override the default action described above. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2645 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
|
2646 Nmh's man page |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2647 .Mp rmm (1) |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2648 proposes to set the |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2649 .Pe rmmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2650 to |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2651 .Cl "refile +d |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2652 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
|
2653 .Fn +d , |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2654 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
|
2655 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
|
2656 .Cl "rm `mhpath +d all` |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2657 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
|
2658 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2659 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
|
2660 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
|
2661 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
|
2662 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
|
2663 No backup files are silently overwritten. |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2664 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
|
2665 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
|
2666 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
|
2667 .Pn refile |
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
2668 can restore deleted messages. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2669 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
|
2670 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
|
2671 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2672 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
|
2673 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
|
2674 Hence, |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2675 .Pn rmm |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2676 calls |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2677 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2678 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
|
2679 .Fn +trash |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2680 by default. |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2681 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
|
2682 .Cl "rmm -unlink +trash a" , |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2683 where the |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2684 .Sw -unlink |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2685 switch causes the files to be unlinked. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2686 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173 |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2687 .Ci ca0b3e830b86700d9e5e31b1784de2bdcaf58fc5 |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2688 .P |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2689 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
|
2690 simplified the code base. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2691 The relationship between |
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 and |
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 was inverted. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2696 In mmh, |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2697 .Pn rmm |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2698 invokes |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2699 .Pn refile , |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2700 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
|
2701 Yet, the relationship is simpler now. |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2702 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
|
2703 .Mp refile (1), |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2704 can no longer occur: |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2705 .QS |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2706 Since |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2707 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2708 uses your |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2709 .Pe rmmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2710 to delete the message, the |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2711 .Pe rmmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2712 must NOT call |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2713 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2714 without specifying |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2715 .Sw -normmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2716 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
|
2717 .QE |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2718 .LP |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2719 .Pn rmm |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2720 either unlinks a message with |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2721 .Fu unlink() |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2722 or invokes |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2723 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2724 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
|
2725 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2726 does not invoke any tools. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2727 .P |
136 | 2728 By generalizing the message removal in the way that it became covered |
2729 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
|
2730 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2731 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2732 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2733 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2734 |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2735 .H2 "Modern Defaults |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2736 .P |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2737 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
|
2738 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
|
2739 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
|
2740 with old versions. |
136 | 2741 But what is the definition for old versions? |
2742 Still, the highly useful draft folder facility has not been activated | |
2743 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
|
2744 .[ |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2745 rose romine real work |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2746 .] |
136 | 2747 The community seems not to care. |
2748 This is one of several examples that require new users to first build up | |
2749 a profile before they can access the modern features of nmh. | |
2750 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
|
2751 for modern emailing. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2752 The point is not the customization of the setup, |
136 | 2753 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
|
2754 .P |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2755 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
|
2756 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
|
2757 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
|
2758 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
|
2759 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
|
2760 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
|
2761 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
|
2762 documentation. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2763 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
|
2764 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
|
2765 just work. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2766 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
|
2767 and I am a software developer, |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2768 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
|
2769 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
|
2770 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
|
2771 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
|
2772 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
|
2773 before they truly used the system, |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2774 although they had been motivated in the beginning. |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
2775 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
|
2776 we developers should spare them further inconveniences. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2777 .P |
136 | 2778 Maintaining compatibility for its own sake is bad, |
2779 because the code base collects more and more compatibility code. | |
2780 Sticking to the compatiblity code means remaining limited; | |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2781 whereas adjusting to the changes renders the compatibility unnecessary. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2782 Keeping unused alternatives in the code is a bad choice as they likely |
136 | 2783 gather bugs, by not being well tested. |
2784 Also, the increased code size and the greater number of conditions | |
2785 increase the maintenance costs. | |
133
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2786 If any MH implementation would be the back-end of widespread |
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2787 email clients with large user bases, compatibility would be more |
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2788 important. |
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2789 Yet, it appears as if this is not the case. |
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2790 Hence, compatibility is hardly important for technical reasons. |
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2791 Its importance originates rather from personal reasons. |
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2792 Nmh's user base is small and old. |
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2793 Changing the interfaces would cause inconvenience to long-term users of MH. |
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2794 It would force them to change their many years old MH configurations. |
168
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2795 I do understand this aspect, but by sticking to the old users, |
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2796 new users are kept away. |
133
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2797 Yet, the future lies in new users. |
168
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2798 In consequence, mmh invites new users by providing a convenient |
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2799 and modern setup, readily usable out-of-the-box. |
133
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2800 .P |
136 | 2801 In mmh, all modern features are active by default and many previous |
2802 approaches are removed or only accessible in manual ways. | |
2803 New default features include: | |
133
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2804 .BU |
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2805 The attachment system (\c |
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2806 .Hd Attach ). |
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2807 .Ci 8ff284ff9167eff8f5349481529332d59ed913b1 |
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2808 .BU |
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2809 The draft folder facility (\c |
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2810 .Fn +drafts ). |
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2811 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860 |
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2812 .BU |
02660c14f6a8
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2813 The unseen sequence (`u') |
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2814 .Ci c2360569e1d8d3678e294eb7c1354cb8bf7501c1 |
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2815 and the sequence negation prefix (`!'). |
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2816 .Ci db74c2bd004b2dc9bf8086a6d8bf773ac051f3cc |
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2817 .BU |
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2818 Quoting the original message in the reply. |
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2819 .Ci 67411b1f95d6ec987b4c732459e1ba8a8ac192c6 |
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2820 .BU |
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2821 Forwarding messages using MIME. |
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2822 .Ci 6e271608b7b9c23771523f88d23a4d3593010cf1 |
171
346ff7e201f5
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2823 .LP |
136 | 2824 In consequence, a setup with a profile that defines only the path to the |
2825 mail storage, is already convenient to use. | |
168
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2826 Again, Paul Vixie's ``edginess'' call supports the direction I took: |
136 | 2827 ``the `main branch' should just be modern''. |
2828 .[ | |
2829 paul vixie edginess nmh-workers | |
2830 .] | |
131
7c741bc8f719
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2831 |
133
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2832 |
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2833 |
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2834 |
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|
2835 |
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|
2836 .\" -------------------------------------------------------------- |
131
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2837 .H1 "Styling |
16
81f703140554
Wrote about the trash folder.
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14
diff
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|
2838 .P |
118
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2839 Kernighan and Pike have emphasized the importance of style in the |
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2840 preface of their book: |
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2841 .[ [ |
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2842 kernighan pike practice of programming |
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|
2843 .], p. x] |
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|
2844 .QS |
48e28eaee6f9
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diff
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|
2845 Chapter 1 discusses programming style. |
48e28eaee6f9
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|
2846 Good style is so important to good programming that we have chose |
48e28eaee6f9
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|
2847 to cover it first. |
48e28eaee6f9
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|
2848 .QE |
168
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Applied suggestions by Lydi.
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2849 This section covers changes in mmh that were guided by the desire |
118
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|
2850 to improve on style. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
diff
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|
2851 Many of them follow the rules given in the quoted book. |
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116
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|
2852 .[ |
48e28eaee6f9
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|
2853 kernighan pike practice of programming |
48e28eaee6f9
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116
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|
2854 .] |
48e28eaee6f9
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diff
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|
2855 |
48e28eaee6f9
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116
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|
2856 |
127
4a9a97d9d6b5
Exchanged the section titles `Style' and `Code Style'.
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diff
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2857 |
4a9a97d9d6b5
Exchanged the section titles `Style' and `Code Style'.
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diff
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2858 |
4a9a97d9d6b5
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diff
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|
2859 .H2 "Code Style |
154
63e885fb48ba
Converted some internal references to the new macros.
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145
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|
2860 .Id code-style |
118
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|
2861 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
diff
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|
2862 .U3 "Indentation Style |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
diff
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|
2863 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
diff
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|
2864 Indentation styles are the holy cow of programmers. |
168
277eeb5ba223
Applied suggestions by Lydi.
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166
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|
2865 Kernighan and Pike |
118
48e28eaee6f9
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116
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|
2866 .[ [ |
48e28eaee6f9
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116
diff
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|
2867 kernighan pike practice of programming |
48e28eaee6f9
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116
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|
2868 .], p. 10] |
168
277eeb5ba223
Applied suggestions by Lydi.
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|
2869 wrote: |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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|
2870 .QS |
48e28eaee6f9
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116
diff
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|
2871 Programmers have always argued about the layout of programs, |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
diff
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|
2872 but the specific style is much less important than its consistent |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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|
2873 application. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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120
diff
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|
2874 Pick one style, preferably ours, use it consistently, and don't waste |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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|
2875 time arguing. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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|
2876 .QE |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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|
2877 .P |
48e28eaee6f9
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diff
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|
2878 I agree that the constant application is most important, |
48e28eaee6f9
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116
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|
2879 but I believe that some styles have advantages over others. |
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116
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|
2880 For instance the indentation with tab characters only. |
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parents:
116
diff
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|
2881 Tab characters directly map to the nesting level \(en |
48e28eaee6f9
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116
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|
2882 one tab, one level. |
48e28eaee6f9
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116
diff
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|
2883 Tab characters are flexible because developers can adjust them to |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
diff
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|
2884 whatever width they like to have. |
48e28eaee6f9
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116
diff
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|
2885 There is no more need to run |
48e28eaee6f9
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116
diff
changeset
|
2886 .Pn unexpand |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
diff
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|
2887 or |
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116
diff
changeset
|
2888 .Pn entab |
48e28eaee6f9
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116
diff
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|
2889 programs to ensure the correct mixture of leading tabs and spaces. |
48e28eaee6f9
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parents:
116
diff
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|
2890 The simple rules are: (1) Leading whitespace must consist of tabs only. |
48e28eaee6f9
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116
diff
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|
2891 (2) Any other whitespace should consist of spaces. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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|
2892 These two rules ensure the integrity of the visual appearance. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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120
diff
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|
2893 Although reformatting existing code should be avoided, I did it. |
136 | 2894 I did not waste time arguing; I just reformated the code. |
118
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Wrote intro to Modernizing and new text about Code Style.
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116
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|
2895 .Ci a485ed478abbd599d8c9aab48934e7a26733ecb1 |
48e28eaee6f9
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116
diff
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|
2896 |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
diff
changeset
|
2897 .U3 "Comments |
48e28eaee6f9
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116
diff
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|
2898 .P |
48e28eaee6f9
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116
diff
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|
2899 Section 1.6 of |
48e28eaee6f9
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116
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|
2900 .[ [ |
48e28eaee6f9
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diff
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|
2901 kernighan pike practice of programming |
48e28eaee6f9
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116
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|
2902 .], p. 23] |
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116
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|
2903 demands: ``Don't belabor the obvious.'' |
122
c234656329e0
Wrote about modularization.
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121
diff
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|
2904 Hence, I simply removed all the comments in the following code excerpt: |
118
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116
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|
2905 .VS |
120
e49780100ffb
Wrote about the rework of anno(1).
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118
diff
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|
2906 context_replace(curfolder, folder); /* update current folder */ |
e49780100ffb
Wrote about the rework of anno(1).
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118
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changeset
|
2907 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
|
2908 seq_save(mp); /* synchronize message sequences */ |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2909 folder_free(mp); /* free folder/message structure */ |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2910 context_save(); /* save the context file */ |
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 int c; /* current character */ |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2915 char *cp; /* miscellaneous character pointer */ |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2916 |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2917 [...] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2918 |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2919 /* NUL-terminate the field */ |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2920 *cp = '\0'; |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2921 VE |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2922 .Ci 426543622b377fc5d091455cba685e114b6df674 |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2923 .P |
136 | 2924 The program code explains enough itself, already. |
2925 | |
118
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 .U3 "Names |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2928 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2929 Kernighan and Pike suggest: |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2930 ``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
|
2931 .[ [ |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2932 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
|
2933 .], p. 4] |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2934 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
|
2935 .Fu check_charset() |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2936 to |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2937 .Fu is_native_charset() . |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2938 .Ci 8d77b48284c58c135a6b2787e721597346ab056d |
181
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
2939 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
|
2940 .[ [ |
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
2941 kernighan pike practice of programming |
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
2942 .], p. 4] |
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
2943 as well. |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2944 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
|
2945 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
|
2946 of the charset name. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2947 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2948 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
|
2949 .VS |
3361e53dfcd6
Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents:
139
diff
changeset
|
2950 m_unknown(in); /* the MAGIC invocation... */ |
3361e53dfcd6
Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents:
139
diff
changeset
|
2951 VE |
3361e53dfcd6
Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents:
139
diff
changeset
|
2952 Renaming the obscure |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2953 .Fu m_unknown() |
145
3361e53dfcd6
Added comments and a source quote.
markus schnalke <meillo@marmaro.de>
parents:
139
diff
changeset
|
2954 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
|
2955 .Ci 611d68d19204d7cbf5bd585391249cb5bafca846 |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2956 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2957 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
|
2958 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
|
2959 ``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
|
2960 .[ [ |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2961 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
|
2962 .], p. 19] |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2963 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
|
2964 to be scanned: |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2965 .VS |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2966 #define SCN_MBOX (-1) |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2967 #define SCN_FOLD 0 |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2968 VE |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2969 .Ci 7ffb36d28e517a6f3a10272056fc127592ab1c19 |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2970 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2971 The argument |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2972 .Ar outnum |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2973 of the function |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2974 .Fu scan() |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2975 in |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2976 .Fn uip/scansbr.c |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2977 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
|
2978 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
|
2979 program logic. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2980 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
|
2981 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
|
2982 .VS |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2983 int incing = (outnum > 0); |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2984 int ismbox = (outnum != 0); |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2985 VE |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2986 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
|
2987 The variable |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2988 .Ar outnum |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2989 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
|
2990 .Ci b8b075c77be7794f3ae9ff0e8cedb12b48fd139f |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2991 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
|
2992 of related code parts. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2993 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
|
2994 straight forward implementation became apparent. |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
2995 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
|
2996 .Ci aa60b0ab5e804f8befa890c0a6df0e3143ce0723 |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2997 |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2998 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2999 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3000 .H2 "Structural Rework |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3001 .P |
136 | 3002 Although the stylistic changes described up to here improve the |
3003 readability of the source code, all of them are changes ``in the small''. | |
3004 Structural changes affect a much larger area. | |
3005 They are more difficult to do but lead to larger improvements, | |
3006 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
|
3007 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3008 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
|
3009 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
|
3010 .[ [ |
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
3011 kernighan pike practice of programming |
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
3012 .], p. 28] |
136 | 3013 Following are two examples of structural rework that show |
3014 why style is important in the first place. | |
3015 | |
3016 | |
3017 .U3 "Rework of \f(CWanno\fP | |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3018 .P |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3019 Until 2002, |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3020 .Pn anno |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3021 had six functional command line switches, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3022 .Sw -component |
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 -text , |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3025 which have an argument each, |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3026 and the two pairs of flags, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3027 .Sw -[no]date |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3028 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3029 .Sw -[no]inplace . |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3030 Then Jon Steinhart introduced his attachment system. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3031 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
|
3032 .Pn anno . |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3033 He added five more switches: |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3034 .Sw -draft , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3035 .Sw -list , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3036 .Sw -delete , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3037 .Sw -append , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3038 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3039 .Sw -number , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3040 the last one taking an argument. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3041 .Ci 7480dbc14bc90f2d872d434205c0784704213252 |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3042 Later, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3043 .Sw -[no]preserve |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3044 was added. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3045 .Ci d9b1d57351d104d7ec1a5621f090657dcce8cb7f |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3046 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
|
3047 .Mp anno (1) |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3048 read: |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3049 .VS |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3050 anno [+folder] [msgs] [-component field] [-inplace | -noinplace] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3051 [-date | -nodate] [-draft] [-append] [-list] [-delete] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3052 [-number [num|all]] [-preserve | -nopreserve] [-version] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3053 [-help] [-text body] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3054 VE |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3055 .LP |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3056 The implementation followed the same structure. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3057 Problems became visible when |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3058 .Cl "anno -list -number 42 |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3059 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
|
3060 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3061 .Cl "anno -list -number l:5 |
124 | 3062 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
|
3063 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
|
3064 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
|
3065 There, the correct use of |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3066 .Sw -number |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3067 was defined as being |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3068 .Cl "[-number [num|all]] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3069 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
|
3070 .Sw -list |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3071 read: |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3072 .QS |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3073 The |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3074 .Sw -list |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3075 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
|
3076 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
|
3077 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
|
3078 .Sw -number |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3079 option is also used. |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3080 .QE |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3081 .LP |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3082 The problem was manifold. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3083 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
|
3084 .Sw -number |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3085 switch. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3086 If it was missing or non-numeric, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3087 .Pn anno |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3088 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
|
3089 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
|
3090 Semantically, the argument to the |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3091 .Sw -number |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3092 switch is only necessary in combination with |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3093 .Sw -delete , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3094 but not with |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3095 .Sw -list . |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3096 .P |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3097 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
|
3098 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
|
3099 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
|
3100 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
|
3101 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
|
3102 to the structure of the problem. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3103 .P |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3104 In 2002, the new switches |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3105 .Sw -list |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3106 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3107 .Sw -delete |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3108 were added in the same way, the |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3109 .Sw -number |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3110 switch for instance had been added. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3111 Yet, they are of structural different type. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3112 Semantically, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3113 .Sw -list |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3114 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3115 .Sw -delete |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3116 introduce modes of operation. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3117 Historically, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3118 .Pn anno |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3119 had only one operation mode: adding header fields. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3120 With the extension it got two more modes: |
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3121 .\" XXX got |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3122 listing and deleting header fields. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3123 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
|
3124 fundamental change to |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3125 .Pn anno 's |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3126 behavior. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3127 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
|
3128 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
|
3129 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
|
3130 .Pn anno |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3131 and its documentation. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3132 .Ci d54c8db8bdf01e8381890f7729bc0ef4a055ea11 |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3133 .P |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3134 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
|
3135 The following code excerpt: |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3136 .VS |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3137 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
|
3138 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
|
3139 [...] |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3140 case DELETESW: /* delete annotations */ |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3141 delete = 0; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3142 continue; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3143 case LISTSW: /* produce a listing */ |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3144 list = 1; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3145 continue; |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3146 VE |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3147 .LP |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3148 was replaced by: |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3149 .VS |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
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|
3150 static enum { MODE_ADD, MODE_DEL, MODE_LIST } mode = MODE_ADD; |
e49780100ffb
Wrote about the rework of anno(1).
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diff
changeset
|
3151 [...] |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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diff
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|
3152 case DELETESW: /* delete annotations */ |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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diff
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|
3153 mode = MODE_DEL; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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parents:
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diff
changeset
|
3154 continue; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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parents:
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diff
changeset
|
3155 case LISTSW: /* produce a listing */ |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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diff
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|
3156 mode = MODE_LIST; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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parents:
120
diff
changeset
|
3157 continue; |
120
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
changeset
|
3158 VE |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
changeset
|
3159 .LP |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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parents:
120
diff
changeset
|
3160 The replacement code does not only reflect the problem's structure better, |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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parents:
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diff
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|
3161 it is easier to understand as well. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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diff
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|
3162 The same applies to the documentation. |
120
e49780100ffb
Wrote about the rework of anno(1).
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parents:
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diff
changeset
|
3163 The man page was completely reorganized to propagate the same structure. |
121
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New text on Standard Libraries plus spellchecking.
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parents:
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diff
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|
3164 This is visible in the Synopsis section: |
120
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
changeset
|
3165 .VS |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
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diff
changeset
|
3166 anno [+folder] [msgs] [-component field] [-text body] |
e49780100ffb
Wrote about the rework of anno(1).
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|
3167 [-append] [-date | -nodate] [-preserve | -nopreserve] |
e49780100ffb
Wrote about the rework of anno(1).
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|
3168 [-Version] [-help] |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
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diff
changeset
|
3169 |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
changeset
|
3170 anno -delete [+folder] [msgs] [-component field] [-text |
e49780100ffb
Wrote about the rework of anno(1).
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diff
changeset
|
3171 body] [-number num | all ] [-preserve | -nopreserve] |
e49780100ffb
Wrote about the rework of anno(1).
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changeset
|
3172 [-Version] [-help] |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
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changeset
|
3173 |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
changeset
|
3174 anno -list [+folder] [msgs] [-component field] [-number] |
e49780100ffb
Wrote about the rework of anno(1).
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diff
changeset
|
3175 [-Version] [-help] |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
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changeset
|
3176 VE |
121
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New text on Standard Libraries plus spellchecking.
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diff
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|
3177 .\" XXX think about explaining the -preserve rework? |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
diff
changeset
|
3178 |
16
81f703140554
Wrote about the trash folder.
markus schnalke <meillo@marmaro.de>
parents:
14
diff
changeset
|
3179 |
0
dc2bfef4cda7
Initial commit: Basic structure, macros and fonts.
markus schnalke <meillo@marmaro.de>
parents:
diff
changeset
|
3180 |
133
02660c14f6a8
Further re-ordering of the sections.
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diff
changeset
|
3181 .U3 "Path Conversion |
02660c14f6a8
Further re-ordering of the sections.
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diff
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|
3182 .P |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3183 Four kinds of path names can appear in MH: |
171
346ff7e201f5
Applied suggestions by Boris.
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169
diff
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|
3184 .LI 1 |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3185 Absolute Unix directory paths, like |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3186 .Fn /etc/passwd . |
171
346ff7e201f5
Applied suggestions by Boris.
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diff
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|
3187 .LI 2 |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3188 Relative Unix directory paths, like |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3189 .Fn ./foo/bar . |
171
346ff7e201f5
Applied suggestions by Boris.
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|
3190 .LI 3 |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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diff
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|
3191 Absolute MH folder paths, like |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3192 .Fn +friends/phil . |
171
346ff7e201f5
Applied suggestions by Boris.
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169
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|
3193 .LI 4 |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3194 Relative MH folder paths, like |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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diff
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|
3195 .Fn @subfolder . |
171
346ff7e201f5
Applied suggestions by Boris.
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|
3196 .LP |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3197 The last type, relative MH folder paths, are hardly documented. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3198 Nonetheless, they are useful for large mail storages. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3199 The current mail folder is specified as `\c |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3200 .Fn @ ', |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
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|
3201 just like the current directory is specified as `\c |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3202 .Fn . '. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3203 .P |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3204 To allow MH tools to understand all four notations, |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3205 they need to convert between them. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3206 .\" XXX between? |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3207 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
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parents:
133
diff
changeset
|
3208 .Fn sbr/path.c |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
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|
3209 (``return a pathname'') and |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3210 .Fn sbr/m_maildir.c |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3211 (``get the path for the mail directory''). |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3212 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
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133
diff
changeset
|
3213 than two comments, which described obvious information. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3214 The function signatures were neither explaining: |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3215 .VS |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3216 char *path(char *, int); |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3217 char *pluspath(char *); |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3218 char *m_mailpath(char *); |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3219 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
|
3220 VE |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3221 .P |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3222 My investigation provides the following description: |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3223 .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
|
3224 The second parameter of |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3225 .Fu path() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3226 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
|
3227 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
|
3228 Folder paths are converted to absolute folder paths. |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3229 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
|
3230 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
|
3231 The result is a pointer to newly allocated memory. |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3232 .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
|
3233 .Fu pluspath() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3234 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
|
3235 .Fu path() , |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3236 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
|
3237 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
|
3238 An empty string parameter causes a buffer overflow. |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3239 .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
|
3240 .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
|
3241 converts directory paths to absolute directory paths. |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3242 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
|
3243 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>
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133
diff
changeset
|
3244 Hence, this function can not be used for folder paths. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3245 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
|
3246 The result is a pointer to newly allocated memory. |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3247 .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
|
3248 .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
|
3249 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
|
3250 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
|
3251 All other strings are prepended with the current working directory. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3252 Hence, this functions can not be used for folder paths. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3253 The result is either an absolute directory path or a relative |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3254 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
|
3255 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
|
3256 static memory. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3257 .P |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3258 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
|
3259 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
|
3260 The first argument of |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3261 .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
|
3262 for instance, was named |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3263 .Ar folder , |
edf46861132b
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133
diff
changeset
|
3264 though |
edf46861132b
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markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3265 .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
|
3266 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
|
3267 .P |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3268 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
|
3269 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
|
3270 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
|
3271 \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
|
3272 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
|
3273 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
|
3274 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>
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133
diff
changeset
|
3275 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
|
3276 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
|
3277 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
|
3278 conversion between the types can be fully automated. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3279 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
|
3280 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
|
3281 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
|
3282 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
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parents:
133
diff
changeset
|
3283 current message. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3284 .Ci cff0e16925e7edbd25b8b9d6d4fbdf03e0e60c01 |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3285 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
|
3286 .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
|
3287 .Fu expandfol() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3288 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
|
3289 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
|
3290 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
|
3291 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
|
3292 The result is a pointer to static memory. |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3293 .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
|
3294 .Fu expanddir() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3295 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
|
3296 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
|
3297 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
|
3298 The result is a pointer to static memory. |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3299 .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
|
3300 .Fu toabsdir() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3301 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
|
3302 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
|
3303 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
|
3304 path name. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3305 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
|
3306 .P |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3307 .\" 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
|
3308 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
|
3309 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
|
3310 same type. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3311 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
|
3312 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
|
3313 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
|
3314 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
|
3315 .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
|
3316 .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
|
3317 is removed. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3318 .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
|
3319 .P |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3320 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
|
3321 .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
|
3322 with |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3323 .Fu getdeffol() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3324 and |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3325 .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
|
3326 with |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3327 .Fu getcurfol() , |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3328 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
|
3329 .Fu expandfol("@") . |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3330 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
|
3331 .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
|
3332 to |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3333 .Fn sbr/path.c . |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3334 .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
|
3335 .P |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3336 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
|
3337 .Fu etcpath() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3338 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
|
3339 .Fn sbr/path.c , |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3340 too |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3341 .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
|
3342 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
|
3343 .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
|
3344 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
|
3345 .P |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3346 .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
|
3347 now contains all path handling code. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3348 .\" 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
|
3349 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
|
3350 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
|
3351 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
|
3352 is introduced by an explaining comment. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3353 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3354 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3355 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3356 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3357 .H2 "Profile Reading |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3358 .P |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3359 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
|
3360 MH tools read the profile right after starting up, |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3361 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
|
3362 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
|
3363 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
|
3364 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
|
3365 .P |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3366 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
|
3367 Among them were |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3368 .Pn post /\c |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3369 .Pn spost , |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3370 .Pn mhmail , |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3371 and |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3372 .Pn slocal . |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3373 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
|
3374 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
|
3375 David Levine posted an explanation, quoting John Romine: |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3376 .[ |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3377 nmh-workers levine post profile |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3378 .] |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3379 .QS |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3380 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
|
3381 agrees and provides an example that convinces me: |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3382 .QS |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3383 My take on this is that |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3384 .Pn post |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3385 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
|
3386 .Fn .mh_profile |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3387 (only front-end UI programs read the profile). |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3388 .QP |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3389 For example, there can be contexts where |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3390 .Pn post |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3391 is called by a helper program (like `\c |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3392 .Pn mhmail ') |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3393 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
|
3394 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
|
3395 .QP |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3396 My suggestion would be to have |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3397 .Pn send |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3398 pass a (hidden) `\c |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3399 .Sw -fileproc |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3400 .Ar proc ' |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3401 option to |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3402 .Pn post |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3403 if needed. |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3404 You could also |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3405 use an environment variable (I think |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3406 .Pn send /\c |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3407 .Pn whatnow |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3408 do this). |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3409 .QE |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3410 I think that's the way to go. |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3411 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
|
3412 not an environment variable. |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3413 .QE |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3414 .P |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3415 To solve the problem of |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3416 .Pn post |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3417 not honoring the |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3418 .Pe fileproc |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3419 profile entry, |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3420 the community roughly agreed that a switch |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3421 .Sw -fileproc |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3422 should be added to |
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 to be able to pass a different fileproc. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3425 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
|
3426 the problem; it only removes a single symptom. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3427 The problem is that |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3428 .Pn post |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3429 does not behave as expected. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3430 But all programs should behave as expected. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3431 Clear and simple concepts are a precondition for this. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3432 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
|
3433 .P |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3434 The problem has a further aspect. |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3435 It mainly originates in |
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 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3438 was intended to be a replacement for |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3439 .Pn mailx |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3440 on systems with MH installations. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3441 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3442 should have been able to use just like |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3443 .Pn mailx , |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3444 but sending the message via MH's |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3445 .Pn post |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3446 instead of |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3447 .Pn sendmail . |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3448 Using |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3449 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3450 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
|
3451 MH set up for himself or not. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3452 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3453 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
|
3454 if not done yet. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3455 As |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3456 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3457 used |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3458 .Pn post , |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3459 .Pn post |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3460 could not read the profile neither. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3461 This is the reason why |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3462 .Pn post |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3463 does not read the profile. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3464 This is the reason for the actual problem. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3465 It was not much of a problem because |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3466 .Pn post |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3467 was not intended to be used by users directly. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3468 .Pn send |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3469 is the interactive front-end to |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3470 .Pn post . |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3471 .Pn send |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3472 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
|
3473 .Pn post |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3474 \(en an awkward solution. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3475 .P |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3476 The important insight is that |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3477 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3478 is no true MH tool. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3479 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
|
3480 MH tool. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3481 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
|
3482 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
|
3483 to instruct them reading a different profile. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3484 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3485 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
|
3486 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
|
3487 With this approach, no special cases would have been introduced, |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3488 no surprises would have been caused. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3489 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
|
3490 generalized orthogonally to the whole MH tool chest. |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3491 Then Rose's motivation behind the decision that |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3492 .Pn post |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3493 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
|
3494 would have become possible: |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3495 .[ |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3496 nmh-workers post profile |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3497 .] |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3498 .QS |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3499 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
|
3500 what the man page says. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3501 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
|
3502 .QE |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3503 .LP |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3504 Yet, I consider this explanation shortsighted. |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3505 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
|
3506 based on two different profiles. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3507 Mapping such problems on the concepts of switching between different |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3508 profiles, solves them once for all. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3509 .P |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3510 In mmh, the wish to have |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3511 .Pn mhmail |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3512 as a replacement for |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3513 .Pn mailx |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3514 is considered obsolete. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3515 Mmh's |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3516 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3517 does no longer cover this use-case. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3518 Currently, |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3519 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3520 is in a transition state. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3521 .Ci 32d4f9daaa70519be3072479232ff7be0500d009 |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3522 It may become a front-end to |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3523 .Pn comp , |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3524 which provides an interface more convenient in some cases. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3525 In this case, |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3526 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3527 will become an ordinary MH tool, reading the profile. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3528 If, however, this idea will not convince, then |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3529 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3530 will be removed. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3531 .P |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3532 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
|
3533 The only exception is |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3534 .Pn slocal , |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3535 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
|
3536 This MDA is only distributed with mmh, currently. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3537 Mmh has no |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3538 .Pn post |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3539 program, but |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3540 .Pn spost , |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3541 which now reads the profile. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3542 .Ci 3e017a7abbdf69bf0dff7a4073275961eda1ded8 |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3543 With this change, |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3544 .Pn send |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3545 and |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3546 .Pn spost |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3547 can be considered to be merged. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3548 .Pn spost |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
3549 is only invoked directly by the to-be-changed |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3550 .Pn mhmail |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3551 implementation and by |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3552 .Pn rcvdist , |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3553 which will require rework. |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3554 .P |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3555 The |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3556 .Fu context_foil() |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3557 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
|
3558 .Ci 68af8da96bea87a5541988870130b6209ce396f6 |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3559 All mmh tools read the profile. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3560 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3561 |
127
4a9a97d9d6b5
Exchanged the section titles `Style' and `Code Style'.
markus schnalke <meillo@marmaro.de>
parents:
126
diff
changeset
|
3562 |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3563 .H2 "Standard Libraries |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
3564 .P |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3565 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
|
3566 Hence, MH included own implementations of functions |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3567 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
|
3568 but were not back then. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3569 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
|
3570 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
|
3571 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
|
3572 can and should be dropped. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3573 Kernighan and Pike advise: ``Use standard libraries.'' |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3574 .[ [ |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3575 kernighan pike practice of programming |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3576 .], p. 196] |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3577 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
|
3578 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
|
3579 The |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3580 .Fu snprintf() |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3581 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
|
3582 almost everywhere because of its high usefulness. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3583 The project's own implementation of |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3584 .Fu snprintf() |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3585 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
|
3586 standard library. |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3587 .Ci 0052f1024deb0a0a2fc2e5bacf93d45a5a9c9b32 |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3588 Such decisions limit the portability of mmh |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3589 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
|
3590 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
|
3591 .P |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3592 .\" XXX kuerzen und mit dem naechsten Absatz vereinen |
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3593 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
|
3594 only half a dozen years. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3595 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
|
3596 I have not used those ancient constructs myself. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3597 I have not suffered from their incompatibilities. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3598 I have not longed for standardization. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3599 All my programming experience is from a time when ANSI C and POSIX |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3600 were well established already. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3601 I have only read a lot of books about the (good) old times. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3602 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
|
3603 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
|
3604 programming styles, whereas older programmers know these things by |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3605 heart from their own experience. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3606 .P |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3607 Being aware of the situation, I rather let people with more historic |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3608 experience replace ancient code constructs with standardized ones. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3609 Lyndon Nerenberg covered large parts of this task for the nmh project. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3610 He converted project-specific functions to POSIX replacements, |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3611 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
|
3612 Ken Hornstein and David Levine had their part in the work, too. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3613 Often, I only needed to pull over changes from nmh into mmh. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3614 These changes include many commits; these are among them: |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3615 .Ci 768b5edd9623b7238e12ec8dfc409b82a1ed9e2d |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3616 .Ci 0052f1024deb0a0a2fc2e5bacf93d45a5a9c9b32 . |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
3617 .P |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3618 During my own work, I tidied up the \fIMH standard library\fP, |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3619 .Fn libmh.a , |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3620 which is located in the |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3621 .Fn sbr |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3622 (``subroutines'') directory in the source tree. |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3623 The MH library includes functions that mmh tools usually need. |
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3624 Among them are MH-specific functions for profile, context, sequence, |
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3625 and folder handling, but as well |
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3626 MH-independent functions, such as auxiliary string functions, |
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3627 portability interfaces and error-checking wrappers for critical |
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3628 functions of the standard library. |
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3629 .P |
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3630 I have replaced the |
121
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3631 .Fu atooi() |
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3632 function with calls to |
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3633 .Fu strtoul() |
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3634 with the third parameter, the base, set to eight. |
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3635 .Fu strtoul() |
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3636 is part of C89 and thus considered safe to use. |
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3637 .Ci c490c51b3c0f8871b6953bd0c74551404f840a74 |
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3638 .P |
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3639 I did remove project-included fallback implementations of |
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3640 .Fu memmove() |
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3641 and |
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3642 .Fu strerror() , |
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3643 although Peter Maydell had re-included them into nmh in 2008 |
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3644 to support SunOS 4. |
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3645 Nevertheless, these functions are part of ANSI C. |
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3646 Systems that do not even provide full ANSI C support should not |
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3647 put a load on mmh. |
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3648 .Ci b067ff5c465a5d243ce5a19e562085a9a1a97215 |
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3649 .P |
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3650 The |
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3651 .Fu copy() |
180
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Applied corrections by Lydi.
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3652 function copies the string in parameter one to the location in |
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3653 parameter two. |
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3654 In contrast to |
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3655 .Fu strcpy() , |
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3656 it returns a pointer to the terminating null-byte in the destination area. |
123
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3657 The code was adjusted to replace |
121
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3658 .Fu copy() |
123
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3659 with |
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3660 .Fu strcpy() , |
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3661 except within |
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3662 .Fu concat() , |
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3663 where |
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3664 .Fu copy() |
123
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3665 was more convenient. |
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3666 Therefore, the definition of |
121
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3667 .Fu copy() |
123
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3668 was moved into the source file of |
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3669 .Fu concat() |
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3670 and its visibility is now limited to it. |
121
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3671 .Ci 552fd7253e5ee9e554c5c7a8248a6322aa4363bb |
102
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More text about attachments mainly, plus some rearrangements.
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3672 .P |
121
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3673 The function |
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3674 .Fu r1bindex() |
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3675 had been a generalized version of |
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3676 .Fu basename() |
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3677 with minor differences. |
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3678 As all calls to |
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3679 .Fu r1bindex() |
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3680 had the slash (`/') as delimiter anyway, |
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3681 replacing |
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3682 .Fu r1bindex() |
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3683 with the more specific and better-named function |
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3684 .Fu basename() |
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3685 became desirable. |
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3686 Unfortunately, many of the 54 calls to |
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3687 .Fu r1bindex() |
123
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3688 depended on a special behavior, |
121
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3689 which differed from the POSIX specification for |
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3690 .Fu basename() . |
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3691 Hence, |
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3692 .Fu r1bindex() |
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3693 was kept but renamed to |
123
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3694 .Fu mhbasename() , |
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3695 fixing the delimiter to the slash. |
121
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3696 .Ci 240013872c392fe644bd4f79382d9f5314b4ea60 |
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3697 For possible uses of |
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3698 .Fu r1bindex() |
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3699 with a different delimiter, |
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3700 the ANSI C function |
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3701 .Fu strrchr() |
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3702 provides the core functionality. |
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3703 .P |
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|
3704 The |
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3705 .Fu ssequal() |
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3706 function \(en apparently for ``substring equal'' \(en |
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3707 was renamed to |
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|
3708 .Fu isprefix() , |
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3709 because this is what it actually checks. |
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3710 .Ci c20b4fa14515c7ab388ce35411d89a7a92300711 |
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3711 Its source file had included the following comments, no joke. |
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3712 .VS |
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3713 /* |
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3714 * THIS CODE DOES NOT WORK AS ADVERTISED. |
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3715 * It is actually checking if s1 is a PREFIX of s2. |
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3716 * All calls to this function need to be checked to see |
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3717 * if that needs to be changed. Prefix checking is cheaper, so |
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3718 * should be kept if it's sufficient. |
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3719 */ |
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3720 |
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3721 /* |
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3722 * Check if s1 is a substring of s2. |
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3723 * If yes, then return 1, else return 0. |
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3724 */ |
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|
3725 VE |
123
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3726 Two months later, it was completely removed by replacing it with |
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3727 .Fu strncmp() . |
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3728 .Ci b0b1dd37ff515578cf7cba51625189eb34a196cb |
121
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3729 |
118
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Wrote intro to Modernizing and new text about Code Style.
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3730 |
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Wrote intro to Modernizing and new text about Code Style.
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3731 |
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Wrote intro to Modernizing and new text about Code Style.
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3732 |
133
02660c14f6a8
Further re-ordering of the sections.
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|
3733 |
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3734 .H2 "User Data Locations |
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3735 .P |
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3736 In nmh, a personal setup consists of the MH profile and the MH directory. |
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3737 The profile is a file named |
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3738 .Fn \&.mh_profile |
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3739 in the user's home directory. |
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3740 It contains the static configuration. |
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3741 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
|
3742 .Pe Path . |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3743 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
|
3744 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
|
3745 configuration files. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3746 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
|
3747 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
|
3748 .Fn Mail |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3749 in the home directory. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3750 .P |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3751 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
|
3752 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
|
3753 configuration file. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3754 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
|
3755 They are different kinds of data: |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3756 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
|
3757 tools operate. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3758 .\" XXX bad ... inapropriate? |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3759 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
|
3760 is bad. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3761 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
|
3762 as well. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3763 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
|
3764 in the first place, I did it now. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3765 .P |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3766 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
|
3767 the mail storage and the configuration. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3768 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
|
3769 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
|
3770 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
|
3771 located there. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3772 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
|
3773 but his \fImail storage\fP. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3774 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
|
3775 .Fn Mail , |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3776 in the user's home directory. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3777 In mmh, the configuration is grouped together in |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3778 the hidden directory |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3779 .Fn \&.mmh |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3780 in the user's home directory. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3781 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
|
3782 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
|
3783 .Fn profile . |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3784 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
|
3785 .Fn $HOME/.mh_profile |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3786 but to |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3787 .Fn $HOME/.mmh/profile . |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3788 Having both the file |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3789 .Fn $HOME/.mh_profile |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3790 and the configuration directory |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3791 .Fn $HOME/.mmh |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3792 appeared to be inconsistent. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3793 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
|
3794 Unix users. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3795 .Ci 7030d7edb099bff36ded7548bb5380f7acab4f9b |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3796 .P |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3797 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
|
3798 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
|
3799 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
|
3800 personal MH setup. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3801 In nmh, the environment variable |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3802 .Ev MH |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3803 could be used to specifiy a different profile. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3804 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
|
3805 the |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3806 .Ev MHCONTEXT |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3807 environment variable could be used. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3808 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
|
3809 each terminal, for instance. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3810 In mmh, three environment variables are used. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3811 .Ev MMH |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3812 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
|
3813 .Fn .mmh ). |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3814 .Ev MMHP |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3815 and |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3816 .Ev MMHC |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3817 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
|
3818 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
|
3819 independently from the profile, context, and mail storage. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3820 .Ci 7030d7edb099bff36ded7548bb5380f7acab4f9b |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3821 .P |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3822 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
|
3823 The new approach has no functional disadvantages, |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3824 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
|
3825 possibly even easier with the new approach. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3826 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
|
3827 between mail storage and configuration. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3828 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3829 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3830 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3831 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3832 |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3833 .H2 "Modularization |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3834 .P |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3835 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
|
3836 .Fn uip |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3837 (``user interface programs'') directory. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3838 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
|
3839 For example, |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3840 .Pn rmm |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3841 is built from |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3842 .Fn uip/rmm.c . |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3843 Some source files are used for multiple programs. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3844 For example |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3845 .Fn uip/scansbr.c |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3846 is used for both |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3847 .Pn scan |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3848 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3849 .Pn inc . |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3850 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
|
3851 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
|
3852 32 programs depended on multiple source files; |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3853 17 programs depended on one source file only. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3854 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
|
3855 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
|
3856 18 programs depend on multiple source files; |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3857 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
|
3858 (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
|
3859 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
|
3860 .\" XXX graph |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3861 .P |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3862 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
|
3863 increase the readability of its source code. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3864 .\" XXX however? |
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3865 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
|
3866 With the exception of the MIME handling tools, |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3867 .Pn pick |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
3868 is the largest tool. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3869 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
|
3870 Only the MIME handling tools (\c |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3871 .Pn mhbuild , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3872 .Pn mhstore , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3873 .Pn show , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3874 etc.) |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3875 are larger. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3876 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
|
3877 source files seldom leads to better readability. |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3878 For such tools, splitting makes sense |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3879 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
|
3880 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
|
3881 for including it in the MH library |
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
3882 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
|
3883 .Fn uip/packsbr.c , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3884 for instance, provides the core program logic for the |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3885 .Pn packf |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3886 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3887 .Pn rcvpack |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3888 programs. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3889 .Fn uip/packf.c |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3890 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3891 .Fn uip/rcvpack.c |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3892 mainly wrap the core function appropriately. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3893 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
|
3894 As another example, |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3895 .Fn uip/termsbr.c |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3896 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
|
3897 curses library. |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3898 Including |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3899 .Fn uip/termsbr.c |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3900 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
|
3901 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
|
3902 .P |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3903 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
|
3904 into multiple source files improves the readability. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3905 The program |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3906 .Pn mhstore , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3907 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
|
3908 lines of code in summary. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3909 The main code file |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3910 .Fn uip/mhstore.c |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3911 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
|
3912 other MIME handling tools. |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3913 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
|
3914 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
|
3915 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
|
3916 .P |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
3917 The work already accomplished focussed on the non-MIME tools. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3918 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
|
3919 This eases the understanding of the code base. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3920 In nmh, |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3921 .Pn comp |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3922 was built from six source files: |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3923 .Fn comp.c , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3924 .Fn whatnowproc.c , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3925 .Fn whatnowsbr.c , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3926 .Fn sendsbr.c , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3927 .Fn annosbr.c , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3928 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3929 .Fn distsbr.c . |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3930 In mmh, it builds from only two: |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3931 .Fn comp.c |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3932 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3933 .Fn whatnowproc.c . |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3934 In nmh's |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3935 .Pn comp , |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3936 the core function of |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3937 .Pn whatnow , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3938 .Pn send , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3939 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3940 .Pn anno |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3941 were compiled into |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3942 .Pn comp . |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3943 This saved the need to execute these programs with |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3944 .Fu fork() |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3945 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3946 .Fu exec() , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3947 two expensive system calls. |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3948 Whereas this approach improved the time performance, |
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3949 it interwove the source code. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3950 Core functionalities were not encapsulated into programs but into |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3951 function, which were then wrapped by programs. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3952 For example, |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3953 .Fn uip/annosbr.c |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3954 included the function |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3955 .Fu annotate() . |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3956 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
|
3957 .Fn uip/annosbr.c |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3958 and called |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3959 .Fu annotate() . |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3960 Because the function |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3961 .Fu annotate() |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3962 was used like the tool |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3963 .Pn anno , |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3964 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
|
3965 When another pair of command line switches was added to |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3966 .Pn anno , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3967 a rather ugly hack was implemented to avoid adding another parameter |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3968 to the function. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3969 .Ci d9b1d57351d104d7ec1a5621f090657dcce8cb7f |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3970 .P |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3971 Separation simplifies the understanding of program code |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3972 because the area influenced by any particular statement is smaller. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3973 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
|
3974 on the function level. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3975 In mmh, the relevant code of |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3976 .Pn comp |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3977 comprises the two files |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3978 .Fn uip/comp.c |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3979 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3980 .Fn uip/whatnowproc.c , |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3981 together 210 lines of code. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3982 In nmh, |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3983 .Pn comp |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3984 comprises six files with 2\|450 lines. |
123
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3985 Not all of the code in these six files was actually used by |
122
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Wrote about modularization.
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3986 .Pn comp , |
123
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Reworked and extended the text about Modularization.
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3987 but the code reader needed to read all of the code first to know which |
740f4128dea7
Reworked and extended the text about Modularization.
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|
3988 parts were used. |
122
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Wrote about modularization.
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|
3989 .P |
123
740f4128dea7
Reworked and extended the text about Modularization.
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|
3990 As I have read a lot in the code base during the last two years, |
740f4128dea7
Reworked and extended the text about Modularization.
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3991 I learned about the easy and the difficult parts. |
171
346ff7e201f5
Applied suggestions by Boris.
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3992 Code is easy to understand if the influenced code area is small |
346ff7e201f5
Applied suggestions by Boris.
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3993 and its boundaries are strictly defined. |
181
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Various stuff: Checked quotes, s/further more/furthermore/, etc
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3994 Furthermore, the code needs to solve the problem in a straight-forward way. |
123
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Reworked and extended the text about Modularization.
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3995 .P |
740f4128dea7
Reworked and extended the text about Modularization.
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3996 .\" XXX move this paragraph somewhere else? |
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|
3997 Reading |
122
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Wrote about modularization.
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3998 .Pn rmm 's |
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Wrote about modularization.
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|
3999 source code in |
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Wrote about modularization.
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|
4000 .Fn uip/rmm.c |
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Wrote about modularization.
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|
4001 is my recommendation for a beginner's entry point into the code base of nmh. |
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Wrote about modularization.
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4002 The reasons are that the task of |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
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|
4003 .Pn rmm |
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Wrote about modularization.
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|
4004 is straight forward and it consists of one small source code file only, |
c234656329e0
Wrote about modularization.
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4005 yet its source includes code constructs typical for MH tools. |
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Wrote about modularization.
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|
4006 With the introduction of the trash folder in mmh, |
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Wrote about modularization.
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4007 .Pn rmm |
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Wrote about modularization.
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|
4008 became a bit more complex, because it invokes |
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Wrote about modularization.
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|
4009 .Pn refile . |
c234656329e0
Wrote about modularization.
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|
4010 Still, it is a good example for a simple tool with clear sources. |
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Wrote about modularization.
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|
4011 .P |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
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|
4012 Understanding |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
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|
4013 .Pn comp |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
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diff
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|
4014 .\" XXX kate fragen: more vs. as much |
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
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|
4015 requires to read 210 lines of code in mmh, but ten times more in nmh. |
123
740f4128dea7
Reworked and extended the text about Modularization.
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|
4016 Due to the aforementioned hack in |
122
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Wrote about modularization.
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|
4017 .Pn anno |
c234656329e0
Wrote about modularization.
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121
diff
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|
4018 to save the additional parameter, information passed through the program's |
c234656329e0
Wrote about modularization.
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|
4019 source base in obscure ways. |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
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|
4020 Thus, understanding |
122
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Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
4021 .Pn comp , |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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|
4022 required understanding the inner workings of |
122
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Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
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|
4023 .Fn uip/annosbr.c |
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Wrote about modularization.
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121
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|
4024 first. |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4025 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
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|
4026 to be examined. |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
4027 Not doing so is a leap of faith, assuming that the developers |
122
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Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
4028 have avoided obscure programming techniques. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
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|
4029 By separating the tools on the program-level, the boundaries are |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
4030 clearly visible and technically enforced. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
4031 The interfaces are calls to |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
4032 .Fu exec() |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
4033 rather than arbitrary function calls. |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
4034 .P |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
4035 But the real problem is another: |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
4036 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
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|
4037 .\" XXX ref |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
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|
4038 Understanding |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4039 .Pn comp |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
4040 requires understanding |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
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|
4041 .Fn uip/annosbr.c |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4042 and |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4043 .Fn uip/sendsbr.c |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4044 because |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4045 .Pn comp |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
4046 does annotate and send messages. |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4047 In nmh, there surely exists the tool |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4048 .Pn send , |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
4049 which does mainly send messages. |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4050 But |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4051 .Pn comp |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4052 and |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4053 .Pn repl |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4054 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4055 .Pn forw |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4056 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4057 .Pn dist |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4058 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4059 .Pn whatnow |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4060 and |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4061 .Pn viamail , |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
4062 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
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|
4063 In result, |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4064 .Pn comp |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4065 sends messages without using |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4066 .Pn send . |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4067 The situation is the same as if |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4068 .Pn grep |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4069 would page without |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
4070 .Pn more |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4071 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
|
4072 .P |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
4073 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
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|
4074 is violated on the level below. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4075 This violation is for the sake of time performance. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4076 On systems where |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4077 .Fu fork() |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4078 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4079 .Fu exec() |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4080 are expensive, the quicker response might be noticable. |
124 | 4081 In the old times, sacrificing readability and conceptional beauty for |
4082 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
|
4083 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
|
4084 No longer should we sacrifice readability or conceptional beauty. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4085 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
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|
4086 guideline. |
181
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
4087 .\" XXX ref |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4088 No longer should we keep speed improvements that became unnecessary. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4089 .P |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4090 Therefore, mmh's |
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 does no longer send messages. |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4093 In mmh, different jobs are divided among separate programs that |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
4094 invoke each other as needed. |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4095 In consequence, |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4096 .Pn comp |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4097 invokes |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4098 .Pn whatnow |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4099 which thereafter invokes |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4100 .Pn send . |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
4101 .Ci 3df5ab3c116e6d4a2fb4bb5cc9dfc5f781825815 |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
4102 .Ci c73c00bfccd22ec77e9593f47462aeca4a8cd9c0 |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
4103 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
|
4104 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
|
4105 annotations, for example, are made by invoking |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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4106 .Pn anno , |
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4107 no matter if requested by programs or by human beings. |
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4108 .Ci 469a4163c2a1a43731d412eaa5d9cae7d670c48b |
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4109 .Ci aed384169af5204b8002d06e7a22f89197963d2d |
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4110 .Ci 3caf9e298a8861729ca8b8a84f57022b6f3ea742 |
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4111 The decrease of tools built from multiple source files and thus |
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4112 the decrease of |
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4113 .Fn uip/*sbr.c |
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4114 files confirm the improvement. |
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4115 .Ci 9e6d91313f01c96b4058d6bf419a8ca9a207bc33 |
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4116 .ci 81744a46ac9f845d6c2b9908074d269275178d2e |
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4117 .Ci f0f858069d21111f0dbea510044593f89c9b0829 |
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4118 .Ci 0503a6e9be34f24858b55b555a5c948182b9f24b |
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4119 .Ci 27826f9353e0f0b04590b7d0f8f83e60462b90f0 |
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4120 .Ci d1da1f94ce62160aebb30df4063ccbc53768656b |
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4121 .Ci c42222869e318fff5dec395eca3e776db3075455 |
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4122 .P |
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4123 .\" XXX move this paragraph up somewhere |
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4124 One disadvantage needs to be taken with this change: |
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4125 The compiler can no longer check the integrity of the interfaces. |
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4126 By changing the command line interfaces of tools, it is |
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4127 the developer's job to adjust the invocations of these tools as well. |
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4128 As this is a manual task and regression tests, which could detect such |
124 | 4129 problems, are not available yet, it is prone to errors. |
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4130 These errors will not be detected at compile time but at run time. |
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4131 Installing regression tests is a pending task. |
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4132 In the best case, a uniform way of invoking tools from other tools |
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4133 can be developed to allow automated testing at compile time. |
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4134 |
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4135 |
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4136 .ig |
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4137 XXX consider writing about mhl vs. mhlproc |
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4138 |
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4139 sbr/showfile.c |
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4140 |
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4141 23 /* |
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4142 24 ** If you have your lproc listed as "mhl", |
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4143 25 ** then really invoked the mhlproc instead |
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4144 26 ** (which is usually mhl anyway). |
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4145 27 */ |
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4146 |
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4147 Sat Nov 24 19:09:14 1984 /mtr (agent: Marshall Rose) <uci@udel-dewey> |
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4148 |
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4149 sbr/showfile.c: if lproc is "mhl", use mhlproc for consistency |
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4150 (Actually, user should use "lproc: show", "showproc: mhl".) |
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4151 .. |