Mercurial > docs > master
annotate discussion.roff @ 224:b0e83cfde2bf
Further minor improvements.
author | markus schnalke <meillo@marmaro.de> |
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date | Sun, 15 Jul 2012 19:46:35 +0200 |
parents | 1fa5a74bf138 |
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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 chosen for the project. |
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6 A selection of the work undertaken |
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7 is described. |
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8 .P |
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9 This discussion compares the present version of mmh with the state of |
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10 nmh at the time when the mmh project had started, i.e. fall 2011. |
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11 Recent changes in nmh are rarely part of the discussion. |
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12 .P |
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13 For the reader's convenience, the structure of modern email systems |
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14 is depicted in the following figure. |
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15 It illustrates the path a message takes from sender to recipient. |
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16 |
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17 .sp 1.5 |
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18 .KS |
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19 .in 2c |
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20 .so input/mail-agents.pic |
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21 .KE |
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22 .sp 1.5 |
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23 |
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24 .LP |
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25 The ellipses denote mail agents, i.e. different jobs in email processing. |
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26 These are: |
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27 .IP "Mail User Agent (MUA) |
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28 The only program users directly interact with. |
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29 It includes functions to compose new mail, display received mail, |
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30 and to manage the mail storage. |
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31 It is called a \fImail client\fP as well. |
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32 .IP "Mail Submission Agent (MSA) |
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33 A special kind of Mail Transfer Agent, used to submit mail into the |
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34 mail transport system. |
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35 Often it is also called an MTA. |
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36 .IP "Mail Transfer Agent (MTA) |
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37 A node in the mail transport system. |
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38 It transfers incoming mail to a transport node nearer to the |
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39 final destination. |
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40 An MTA may be the final destination itself. |
187
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41 .IP "Mail Delivery Agent (MDA) |
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42 Delivers mail according to a set of rules. |
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43 Usually, the messages are stored to disk. |
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44 .IP "Mail Retrieval Agent (MRA) |
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45 Initiates the transfer of mail from a remote location to the local machine. |
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46 (The dashed arrow in the figure represents the pull request.) |
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47 .LP |
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48 The dashed boxes represent entities that usually reside on single machines. |
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49 The box on the lower left represents the sender's system. |
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50 The box on the upper left represents the first mail transfer node. |
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51 The box on the upper right represents the transfer node responsible |
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52 for the destination address. |
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53 The box on the lower right represents the recipient's system. |
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54 Often, the boxes above the dotted line are servers on the Internet. |
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55 Many mail clients, including nmh, include all of the components below |
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56 the dotted line. |
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57 This is not the case for mmh; it implements the MUA only. |
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58 |
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59 |
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60 |
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61 |
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62 |
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63 |
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64 .\" -------------------------------------------------------------- |
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65 .H1 "Streamlining |
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66 |
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67 .P |
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68 MH once provided a complete email system. |
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69 The community around nmh tries to keep nmh in similar shape. |
178 | 70 In fundamental contrast, mmh shall be an MUA only. |
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71 I believe that the development of all-in-one mail systems is obsolete. |
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72 Today, email is too complex to be fully covered by a single project. |
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73 Such a project will not be able to excel in all aspects. |
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74 Instead, the aspects of email should be covered by multiple projects, |
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75 which then can be combined to form a complete system. |
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76 Excellent implementations for the various aspects of email already exist. |
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77 Just to name three examples: Postfix is a specialized MTA, Procmail |
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78 is a specialized MDA, and Fetchmail is a specialized MRA. |
89 | 79 I believe that it is best to use such specialized tools instead of |
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80 providing the same function once more as a side component. |
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81 .P |
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82 Doing something well requires focusing on a small set of specific aspects. |
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83 Under the assumption that development which is focussed on a particular |
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84 area produces better results there, specialized projects will be superior |
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85 in their field of focus. |
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86 Hence, all-in-one mail system projects \(en no matter if monolithic |
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87 or modular \(en will never be the best choice in any of the fields. |
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88 Even in providing the most consistent all-in-one system, they are likely |
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89 to be beaten by projects that focus exclusively on the creation |
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90 of a homogeneous system by integrating existing mail components. |
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91 .P |
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92 Usually, the limiting resource in the community development of |
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93 free software is man power. |
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94 .\" XXX FIXME ref! |
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95 If the development effort is spread over a large development area, |
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96 it becomes more difficult to compete with the specialists in the |
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97 various fields. |
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98 The concrete situation for MH-based mail systems is even tougher, |
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99 given their small and aged community, concerning both developers and users. |
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100 .P |
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101 In consequence, I believe that the available development resources |
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102 should focus on the point where MH is most unique. |
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103 This is clearly the user interface \(en the MUA. |
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104 Peripheral parts should be removed to streamline mmh for the MUA task. |
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105 |
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106 |
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107 .H2 "Mail Transfer Facilities |
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108 .Id mail-transfer-facilities |
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109 .P |
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110 The removal of the mail transfer facilities, effectively dropping the |
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111 MSA and MRA, had been the first work task in the mmh project. |
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112 The desire for this change initiated the creation of the mmh project. |
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113 .P |
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114 Focusing on one mail agent role only, is motivated by Eric Allman's |
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115 experience with Sendmail. |
217
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116 He identified the limitation of Sendmail |
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117 to the MTA task as one reason for its success: |
105
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118 .[ [ |
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119 costales sendmail |
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120 .], p. xviii] |
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121 .QS |
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122 Second, I limited myself to the routing function \(en |
110 | 123 I wouldn't write user agents or delivery back-ends. |
217
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124 This was a departure of the dominant thought of the time, |
105
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125 in which routing logic, local delivery, and often the network code |
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126 were incorporated directly into the user agents. |
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127 .QE |
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128 .P |
187
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129 In nmh, the MSA is called \fIMessage Transfer Service\fP (MTS). |
105
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130 This facility, implemented by the |
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131 .Pn post |
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132 command, establishes network connections and spoke SMTP to submit |
159
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133 messages to be relayed to the outside world. |
217
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134 When email transfer changed, this part needed to be changed as well. |
89 | 135 Encryption and authentication for network connections |
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136 needed to be supported, hence TLS and SASL were introduced into nmh. |
217
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137 This added complexity without improving the core functions. |
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138 Furthermore, keeping up with recent developments in the field of |
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139 mail transfer requires development power and specialists. |
217
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140 In mmh, this whole facility was simply cut off |
76
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141 .Ci f6aa95b724fd8c791164abe7ee5468bf5c34f226 |
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142 .Ci fecd5d34f65597a4dfa16aeabea7d74b191532c3 |
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143 .Ci 156d35f6425bea4c1ed3c4c79783dc613379c65b . |
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144 Instead, mmh depends on an external MSA. |
217
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145 All outgoing mail in mmh goes through the |
60
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146 .Pn sendmail |
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147 command, which almost any MSA provides. |
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148 If not, a wrapper program can be written. |
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149 It must read the message from the standard input, extract the |
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150 recipient addresses from the message header, and hand the message |
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151 over to the MSA. |
223
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152 For example, a wrapper script for qmail would be: |
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153 .VS |
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154 #!/bin/sh |
138
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155 exec qmail-inject # ignore command line arguments |
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156 VE |
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157 The requirement to parse the recipient addresses out of the message header |
217
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158 may be removed in the future. |
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159 Mmh could pass the recipient addresses as command line arguments. |
100
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160 This appears to be the better interface. |
60
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161 .P |
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162 To retrieve mail, the |
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163 .Pn inc |
217
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164 command in nmh acts as MRA. |
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165 It establishes network connections |
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166 and speaks POP3 to retrieve mail from remote servers. |
76
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167 As with mail submission, the network connections required encryption and |
217
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168 authentication, thus TLS and SASL were added to nmh. |
169
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169 Support for message retrieval through IMAP will soon become necessary |
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170 additions, too, and likewise for any other changes in mail transfer. |
217
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171 But not in mmh because it has dropped the support for retrieving mail |
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172 from remote locations |
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173 .Ci ab7b48411962d26439f92f35ed084d3d6275459c . |
76
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174 Instead, it depends on an external tool to cover this task. |
169
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175 Mmh has two paths for messages to enter mmh's mail storage: |
100
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176 (1) Mail can be incorporated with |
60
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177 .Pn inc |
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178 from the system maildrop, or (2) with |
60
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179 .Pn rcvstore |
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180 by reading them, one at a time, from the standard input. |
60
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181 .P |
217
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182 With the removal of the MSA and MRA, mmh converted from a complete |
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183 mail system to only an MUA. |
60
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184 Now, of course, mmh depends on third-party software. |
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185 An external MSA is required to transfer mail to the outside world; |
60
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186 an external MRA is required to retrieve mail from remote machines. |
217
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187 Excellent implementations of such software exist. |
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188 They likely are superior to the internal versions that were removed. |
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189 Additionally, the best suiting programs can be chosen freely. |
60
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190 .P |
217
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191 As it had already been possible to use an external MSA and MRA, |
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192 why should the internal version not be kept for convenience? |
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193 .\" XXX commas correct? |
224
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194 Transfered to a different area, the question, |
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195 whether there is sense in having a fall-back pager in all |
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196 the command line tools for the cases when |
60
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197 .Pn more |
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198 or |
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199 .Pn less |
173
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200 are not available, appears to be ridiculous. |
100
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201 Of course, MSAs and MRAs are more complex than text pagers |
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202 and not necessarily available but still the concept of orthogonal |
217
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203 design holds: ``Write programs that do one thing and do it well''. |
87
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204 .[ |
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205 mcilroy unix phil |
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206 p. 53 |
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207 .] |
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208 .[ |
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209 mcilroy bstj foreword |
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210 .] |
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211 Here, this part of the Unix philosophy was applied not only |
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212 to the programs but to the project itself. |
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213 In other words: |
164
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214 Develop projects that focus on one thing and do it well. |
169
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215 Projects which have grown complex should be split, for the same |
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216 reasons that programs which have grown complex should be split. |
100
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217 If it is conceptionally more elegant to have the MSA and MRA as |
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218 separate projects then they should be separated. |
217
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219 In my opinion, this is the case. |
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220 The RFCs suggest this separation by clearly distinguishing the |
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221 different mail handling tasks [RFC\|821]. |
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222 The small interfaces between the mail agents support the |
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223 separation as well. |
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224 .P |
217
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225 Once, email had been small and simple. |
100
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226 At that time, |
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227 .Pn /bin/mail |
169
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228 had covered everything there was to email and still was small and simple. |
100
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229 Later, the essential complexity of email increased. |
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230 (Essential complexity is the complexity defined by the problem itself |
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231 .[ [ |
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232 brooks no silver bullet |
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233 .]].) |
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234 Consequently, email systems grew. |
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235 RFCs started to introduce the concept of mail agents to separate the |
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236 various roles because they became more extensive and because |
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237 new roles appeared. |
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238 As mail system implementations grew, parts of them were split off. |
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239 For instance, a POP server was included in the original MH; |
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240 it was removed in nmh. |
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241 Now is the time to go one step further and split off the MSA and MRA, |
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242 as well. |
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243 Not only does this decrease the code size of the project, |
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244 more importantly, it unburdens mmh of the whole field of |
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245 message transfer, with all its implications for the project. |
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246 There is no more need for concern with changes in network transfer. |
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247 This independence is gained by depending on external components |
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248 that cover the field. |
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249 .P |
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250 In general, functionality can be added in three different ways: |
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251 .LI 1 |
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252 By implementing the function in the project itself. |
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253 .LI 2 |
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254 By depending on a library that provides the function. |
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255 .LI 3 |
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256 By depending on a program that provides the function. |
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257 .LP |
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258 .\" XXX Rework sentence |
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259 While implementing the function in the project itself leads to the |
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260 largest increase in code size and requires the most maintenance |
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261 and development work, |
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262 it keeps the project's dependence on other software lowest. |
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263 Using libraries or external programs requires less maintenance work |
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264 but introduces dependencies on external projects. |
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265 Programs have the smallest interfaces and provide the best separation, |
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266 but possibly limit the information exchange. |
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267 External libraries are more strongly connected than external programs, |
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268 thus information can be exchanged in a more flexible manner. |
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269 Adding code to a project increases maintenance work. |
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270 .\" XXX ref |
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271 As implementing complex functions in the project itself adds |
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272 a lot of code, this should be avoided if possible. |
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273 Thus, the dependencies only change in their character, |
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274 not in their existence. |
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275 In mmh, library dependencies on |
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276 .Pn libsasl2 |
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277 and |
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278 .Pn libcrypto /\c |
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279 .Pn libssl |
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280 were traded against program dependencies on an MSA and an MRA. |
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281 This also meant trading build-time dependencies against run-time |
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282 dependencies. |
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283 Besides providing stronger separation and greater flexibility, |
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284 program dependencies also allowed |
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285 over 6\|000 lines of code to be removed from mmh. |
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286 This made mmh's code base about 12\|% smaller. |
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287 Reducing the project's code size by such an amount without actually |
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288 losing functionality is a convincing argument. |
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289 Actually, as external MSAs and MRAs are likely superior to the |
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290 project's internal versions, the common user even gains functionality. |
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291 .P |
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292 Users of MH should not have problems setting up an external MSA and MRA. |
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293 Also, the popular MSAs and MRAs have large communities and a lot |
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294 of available documentation. |
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295 |
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296 Choices for MSAs range from small forwarders such as \fIssmtp\fP and |
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297 \fInullmailer\fP, over mid-size MTAs including \fImasqmail\fP and |
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298 \fIdma\fP, up to full-featured MTAs as for instance \fIPostfix\fP. |
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299 MRAs are provided for example by \fIfetchmail\fP, \fIgetmail\fP, |
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300 \fImpop\fP, and \fIfdm\fP. |
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301 |
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302 |
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303 .H2 "Non-MUA Tools |
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304 .P |
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305 One goal of mmh is to remove the tools that do not significantly |
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306 contribute to the MUA's job. |
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307 Loosely related and rarely used tools distract from a lean appearance, |
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308 and require maintenance work without adding much to the core task. |
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309 By removing these tools, mmh became more streamlined and focused. |
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310 .BU |
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311 .Pn conflict |
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312 was removed |
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313 .Ci 8b235097cbd11d728c07b966cf131aa7133ce5a9 |
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314 because it is a mail system maintenance tool and not MUA-related. |
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315 It even checked |
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316 .Fn /etc/passwd |
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317 and |
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318 .Fn /etc/group |
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319 for consistency, which is completely unrelated to email. |
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320 A tool like |
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321 .Pn conflict |
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322 is surely useful, but it should not be shipped with mmh. |
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323 .\" XXX historic reasons? |
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324 .BU |
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325 .Pn rcvtty |
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326 was removed |
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327 .Ci 14767c94b3827be7c867196467ed7aea5f6f49b0 |
89 | 328 because its use case of writing to the user's terminal |
200 | 329 on reception of mail is obsolete. |
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330 If users like to be informed of new mail, the shell's |
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331 .Ev MAILPATH |
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332 variable or graphical notifications are technically more appealing. |
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333 Writing to terminals directly is hardly ever desired today. |
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334 If, though, one prefers this approach, the standard tool |
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335 .Pn write |
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336 can be used in a way similar to: |
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337 .VS |
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338 scan -file - | write `id -un` |
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339 VE |
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340 .BU |
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341 .Pn viamail |
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342 .\" XXX was macht viamail |
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343 was removed |
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344 .Ci eda72d6a7a7c20ff123043fb7f19c509ea01f932 |
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345 when the new attachment system was activated, because |
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346 .Pn forw |
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347 could then cover the task itself. |
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348 The program |
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349 .Pn sendfiles |
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350 was rewritten as a shell script wrapper around |
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351 .Pn forw . |
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352 .Ci 0e82199cf3c991a173e0ac8aa776efdb3ded61e6 |
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353 .BU |
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354 .Pn msgchk |
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355 .\" XXX was macht msgchk |
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356 was removed |
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357 .Ci bb9360ead7eb7a3fedcce2eeedfc660014e41dbe , |
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358 because it lost its use case when POP support was removed. |
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359 A call to |
58
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360 .Pn msgchk |
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361 provided hardly more information than: |
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362 .VS |
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363 ls -l /var/mail/meillo |
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364 VE |
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365 Yet, it distinguished between old and new mail, but |
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366 these details can be retrieved with |
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367 .Pn stat (1), |
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368 too. |
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369 A small shell script could be written to print the information |
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370 in a similar way, if truly necessary. |
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371 As mmh's |
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372 .Pn inc |
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373 only incorporates mail from the user's local maildrop, |
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374 and thus no data transfers over slow networks are involved, |
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375 there is hardly any need to check for new mail before incorporating it. |
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376 .BU |
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377 .Pn msh |
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378 was removed |
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379 .Ci 916690191222433a6923a4be54b0d8f6ac01bd02 |
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380 because the tool was in conflict with the philosophy of MH. |
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381 It provided an interactive shell to access the features of MH. |
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382 However, it was not just a shell tailored to the needs of mail handling, |
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383 but one large program that had several MH tools built in. |
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384 This conflicted with the major feature of MH of being a tool chest. |
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385 .Pn msh 's |
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386 main use case had been accessing Bulletin Boards, which have ceased to |
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387 be popular. |
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388 .P |
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389 Removing |
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390 .Pn msh |
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391 together with the truly archaic code relics |
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392 .Pn vmh |
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393 and |
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394 .Pn wmh |
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395 saved more than 7\|000 lines of C code \(en |
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396 about 15\|% of the project's original source code amount. |
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397 Having less code \(en with equal readability, of course \(en |
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398 for the same functionality is an advantage. |
63 | 399 Less code means less bugs and less maintenance work. |
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400 As |
63 | 401 .Pn rcvtty |
402 and | |
403 .Pn msgchk | |
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404 are assumed to be rarely used and can be implemented in different ways, |
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405 why should one keep them? |
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406 Removing them streamlined mmh. |
63 | 407 .Pn viamail 's |
408 use case is now partly obsolete and partly covered by | |
409 .Pn forw , | |
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410 hence there is no reason to still maintain it. |
63 | 411 .Pn conflict |
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412 is not related to the mail client, and |
63 | 413 .Pn msh |
414 conflicts with the basic concept of MH. | |
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415 These two tools might still be useful, but they should not be part of mmh. |
63 | 416 .P |
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417 .Id slocal |
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418 Finally, there is |
217
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419 .Pn slocal , |
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420 which is an MDA and thus not directly MUA-related. |
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421 It should be removed from mmh because including it conflicts with |
178 | 422 the idea that mmh is an MUA only. |
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423 However, |
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424 .Pn slocal |
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425 provides rule-based processing of messages, like filing them into |
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426 different folders, which is otherwise not available in mmh. |
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427 Although |
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428 .Pn slocal |
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429 neither pulls in dependencies, nor does it include a separate |
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430 technical area (cf. Sec. |
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431 .Cf mail-transfer-facilities ), |
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432 it still accounts for about 1\|000 lines of code that need to be maintained. |
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433 As |
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434 .Pn slocal |
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435 is almost self-standing, it should be split off into a separate project. |
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436 This would cut the strong connection between the MUA mmh and the MDA |
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437 .Pn slocal . |
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438 For anyone not using MH, |
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439 .Pn slocal |
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440 would become yet another independent MDA, like |
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441 .I procmail . |
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442 Then |
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443 .Pn slocal |
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444 could be installed without a complete MH system. |
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445 Likewise, mmh users could decide to use |
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446 .I procmail |
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447 without having a second, unused MDA, i.e. |
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448 .Pn slocal , |
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449 installed. |
100
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450 That appears to be conceptionally the best solution. |
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451 Yet, |
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452 .Pn slocal |
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453 is not split off. |
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454 I defer the decision over |
78 | 455 .Pn slocal |
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456 out of a need for deeper investigation. |
217
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457 In the meanwhile, it remains part of mmh |
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458 as its continued existence is not significant; |
100
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459 .Pn slocal |
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460 is unrelated to the rest of the project. |
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diff
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461 |
0
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Initial commit: Basic structure, macros and fonts.
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462 |
133
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463 |
134
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464 .H2 "Displaying Messages |
155
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465 .Id mhshow |
131
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466 .P |
133
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467 Since the very beginning, already in the first concept paper, |
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468 .\" XXX ref!!! |
58
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469 .Pn show |
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470 had been MH's message display program. |
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471 .Pn show |
76
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472 mapped message numbers and sequences to files and invoked |
58
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473 .Pn mhl |
89 | 474 to have the files formatted. |
173
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475 With MIME, this approach was not sufficient anymore. |
217
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476 MIME messages can consist of multiple parts. |
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477 Some parts, like binary attachments or text content in foreign charsets, |
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478 are not directly displayable. |
58
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479 .Pn show 's |
76
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480 understanding of messages and |
58
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481 .Pn mhl 's |
173
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482 display capabilities could not cope with the task any longer. |
62
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483 .P |
88 | 484 Instead of extending these tools, additional tools were written from |
217
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485 scratch and were added to the MH tool chest. |
88 | 486 Doing so is encouraged by the tool chest approach. |
487 Modular design is a great advantage for extending a system, | |
488 as new tools can be added without interfering with existing ones. | |
62
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489 First, the new MIME features were added in form of the single program |
58
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490 .Pn mhn . |
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491 The command |
82
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Mayor rework: Replaced .DS with .VS, a better verbatim environment.
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492 .Cl "mhn -show 42 |
217
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493 had then shown the message number |
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494 .Fn 42 , |
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495 interpreting MIME. |
58
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496 With the 1.0 release of nmh in February 1999, Richard Coleman finished |
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497 the split of |
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498 .Pn mhn |
88 | 499 into a set of specialized tools, which together covered the |
500 multiple aspects of MIME. | |
501 One of them was | |
69
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502 .Pn mhshow , |
88 | 503 which replaced |
504 .Cl "mhn -show" . | |
505 It was capable of displaying MIME messages appropriately. | |
62
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506 .P |
88 | 507 From then on, two message display tools were part of nmh, |
76
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508 .Pn show |
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509 and |
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510 .Pn mhshow . |
88 | 511 To ease the life of users, |
69
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512 .Pn show |
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513 was extended to automatically hand the job over to |
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514 .Pn mhshow |
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515 if displaying the message would be beyond |
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516 .Pn show 's |
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517 abilities. |
88 | 518 In consequence, the user would simply invoke |
69
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519 .Pn show |
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520 (possibly through |
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521 .Pn next |
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|
522 or |
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523 .Pn prev ) |
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524 and get the message printed with either |
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525 .Pn show |
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526 or |
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527 .Pn mhshow , |
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528 whatever was more appropriate. |
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529 .P |
217
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530 Having two similar tools for basically the same task is redundancy. |
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531 Usually, users do not distinguish between |
88 | 532 .Pn show |
533 and | |
534 .Pn mhshow | |
535 in their daily mail reading. | |
217
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536 Having two separate display programs was therefore unnecessary |
88 | 537 from a user's point of view. |
538 Besides, the development of both programs needed to be in sync, | |
76
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Rework of existing text.
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539 to ensure that the programs behaved in a similar way, |
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540 because they were used like a single tool. |
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541 Different behavior would have surprised the user. |
69
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542 .P |
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Wrote more about the show-mhshow merge.
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543 Today, non-MIME messages are rather seen to be a special case of |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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diff
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|
544 MIME messages, although it is the other way round. |
69
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66
diff
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|
545 As |
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546 .Pn mhshow |
217
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547 already had been able to display non-MIME messages, it appeared natural |
69
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|
548 to drop |
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|
549 .Pn show |
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|
550 in favor of using |
f80ced4e749b
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|
551 .Pn mhshow |
217
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552 exclusively |
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A big bunch of corrections in 2.1 and 2.2.
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|
553 .Ci 4c1efddfd499300c7e74263e57d8aa137e84c853 . |
88 | 554 Removing |
555 .Pn show | |
217
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diff
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|
556 is no loss in function, because |
88 | 557 .Pn mhshow |
558 covers it completely. | |
217
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A big bunch of corrections in 2.1 and 2.2.
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559 Yet, the old behavior of |
88 | 560 .Pn show |
561 can still be emulated with the simple command line: | |
562 .VS | |
563 mhl `mhpath c` | |
564 VE | |
565 .P | |
76
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Rework of existing text.
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74
diff
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|
566 For convenience, |
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74
diff
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|
567 .Pn mhshow |
88 | 568 was renamed to |
569 .Pn show | |
570 after | |
571 .Pn show | |
572 was gone. | |
573 It is clear that such a rename may confuse future developers when | |
574 trying to understand the history. | |
575 Nevertheless, I consider the convenience on the user's side, | |
217
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A big bunch of corrections in 2.1 and 2.2.
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576 to outweigh the inconvenience for understanding the evolution |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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577 of the tools. |
69
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|
578 .P |
88 | 579 To prepare for the transition, |
69
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580 .Pn mhshow |
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|
581 was reworked to behave more like |
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|
582 .Pn show |
217
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583 first (cf. Sec. |
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584 .Cf mhshow ). |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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|
585 .\" XXX code commits? |
88 | 586 Once the tools behaved more alike, the replacing appeared to be |
587 even more natural. | |
588 Today, mmh's new | |
69
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diff
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|
589 .Pn show |
217
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590 has become the one single message display program once again, |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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diff
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|
591 with the difference |
88 | 592 that today it handles MIME messages as well as non-MIME messages. |
217
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593 The outcomes of the transition are one program less to maintain, |
88 | 594 no second display program for users to deal with, |
595 and less system complexity. | |
69
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|
596 .P |
88 | 597 Still, removing the old |
69
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598 .Pn show |
88 | 599 hurts in one regard: It had been such a simple program. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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600 Its lean elegance is missing from the new |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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parents:
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601 .Pn show , |
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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602 .\" XXX |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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603 however there is no alternative; |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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diff
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|
604 supporting MIME demands higher essential complexity. |
58
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Restructured the content in ch03.
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parents:
51
diff
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|
605 |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
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|
606 .ig |
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diff
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|
607 XXX |
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Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
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|
608 Consider including text on scan listings here |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
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parents:
130
diff
changeset
|
609 |
134
edf46861132b
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parents:
133
diff
changeset
|
610 Scan listings shall not contain body content. Hence, removed this feature. |
edf46861132b
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611 Scan listings shall operator on message headers and non-message information |
edf46861132b
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|
612 only. Displaying the beginning of the body complicates everything too much. |
edf46861132b
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133
diff
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613 That's no surprise, because it's something completely different. If you |
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diff
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614 want to examine the body, then use show(1)/mhshow(1). |
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615 Changed the default scan formats accordingly. |
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616 .Ci 70b2643e0da8485174480c644ad9785c84f5bff4 |
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617 .. |
131
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618 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
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|
619 |
7c741bc8f719
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diff
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|
620 |
133
02660c14f6a8
Further re-ordering of the sections.
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parents:
131
diff
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|
621 |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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parents:
98
diff
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|
622 .H2 "Configure Options |
58
814c33b96d89
Restructured the content in ch03.
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51
diff
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|
623 .P |
76
2e61e0004a8f
Rework of existing text.
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parents:
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|
624 Customization is a double-edged sword. |
2e61e0004a8f
Rework of existing text.
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|
625 It allows better suiting setups, but not for free. |
2e61e0004a8f
Rework of existing text.
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626 There is the cost of code complexity to be able to customize. |
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627 There is the cost of less tested setups, because there are |
171
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628 more possible setups and especially corner cases. |
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629 Additionally, there is the cost of choice itself. |
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630 The code complexity directly affects the developers. |
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631 Less tested code affects both users and developers. |
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632 The problem of choice affects the users, for once by having to choose |
159
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633 but also by more complex interfaces that require more documentation. |
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634 Whenever options add few advantages but increase the complexity of the |
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635 system, they should be considered for removal. |
72
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636 I have reduced the number of project-specific configure options from |
217
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637 15 to 3. |
74
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638 |
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639 .U3 "Mail Transfer Facilities |
74
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640 .P |
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641 With the removal of the mail transfer facilities 5 configure |
85
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642 options vanished: |
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643 .P |
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644 The switches |
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645 .Sw --with-tls |
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646 and |
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647 .Sw --with-cyrus-sasl |
89 | 648 had activated the support for transfer encryption and authentication. |
159
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649 .\" XXX cf |
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650 .\" XXX gruende kurz wiederholen |
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651 They are not needed anymore. |
85
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652 .Ci fecd5d34f65597a4dfa16aeabea7d74b191532c3 |
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653 .Ci 156d35f6425bea4c1ed3c4c79783dc613379c65b |
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654 .P |
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655 .\" XXX cf |
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656 .\" XXX ``For the same reason ...'' |
85
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657 The configure switch |
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658 .Sw --enable-pop |
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659 activated the message retrieval facility. |
217
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660 Whereas the code area that had been conditionally compiled in |
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661 for TLS and SASL support was small, |
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662 the conditionally compiled code area for POP support was much larger. |
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663 The code base had only changed slightly on toggling TLS or SASL |
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664 support but it had changed much on toggling POP support. |
85
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665 The changes in the code base could hardly be overviewed. |
159
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666 By having POP support togglable, a second code base had been created, |
85
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667 one that needed to be tested. |
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Extended the text about mail transfer configure options.
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668 This situation is basically similar for the conditional TLS and SASL |
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Extended the text about mail transfer configure options.
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669 code, but there the changes are minor and can yet be overviewed. |
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Extended the text about mail transfer configure options.
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670 Still, conditional compilation of a code base creates variations |
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671 of the original program. |
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Extended the text about mail transfer configure options.
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672 More variations require more testing and maintenance work. |
fb0d1b4c8fb1
Extended the text about mail transfer configure options.
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diff
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|
673 .P |
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Extended the text about mail transfer configure options.
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|
674 Two other options only specified default configuration values: |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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|
675 .Sw --with-mts |
217
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A big bunch of corrections in 2.1 and 2.2.
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676 defined the default transport service |
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A big bunch of corrections in 2.1 and 2.2.
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677 .Ci f6aa95b724fd8c791164abe7ee5468bf5c34f226 . |
85
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Extended the text about mail transfer configure options.
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|
678 With |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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|
679 .Sw --with-smtpservers |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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680 default SMTP servers could be specified |
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A big bunch of corrections in 2.1 and 2.2.
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681 .Ci 128545e06224233b7e91fc4c83f8830252fe16c9 . |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
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682 Both of them became irrelevant when the SMTP transport service was removed. |
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Reacted to suggestions by Aaron Mueller.
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|
683 .\" XXX code ref |
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Reacted to suggestions by Aaron Mueller.
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684 In mmh, all messages are handed over to |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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|
685 .Pn sendmail |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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|
686 for transportation. |
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Reacted to suggestions by Aaron Mueller.
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diff
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|
687 |
72
bae9273b5802
Wrote about configure options (not finished yet).
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69
diff
changeset
|
688 |
74
cefaa856d431
A lot of new text about configure switches.
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diff
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|
689 .U3 "Backup Prefix |
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A lot of new text about configure switches.
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72
diff
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|
690 .P |
76
2e61e0004a8f
Rework of existing text.
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diff
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|
691 The backup prefix is the string that was prepended to message |
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Rework of existing text.
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74
diff
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|
692 filenames to tag them as deleted. |
173
4c7db172fb59
Various corrections and improvements.
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171
diff
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|
693 By default it had been the comma character (`\fL,\fP'). |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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|
694 .\" XXX Zeitlich ordnen |
78 | 695 In July 2000, Kimmo Suominen introduced |
696 the configure option | |
697 .Sw --with-hash-backup | |
173
4c7db172fb59
Various corrections and improvements.
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171
diff
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|
698 to change the default to the hash character `\f(CW#\fP'. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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212
diff
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|
699 This choice was probably personal preference, but, |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
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|
700 being related or not, words that start with the hash character |
78 | 701 introduce a comment in the Unix shell. |
72
bae9273b5802
Wrote about configure options (not finished yet).
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parents:
69
diff
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|
702 Thus, the command line |
bae9273b5802
Wrote about configure options (not finished yet).
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69
diff
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|
703 .Cl "rm #13 #15 |
bae9273b5802
Wrote about configure options (not finished yet).
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parents:
69
diff
changeset
|
704 calls |
bae9273b5802
Wrote about configure options (not finished yet).
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parents:
69
diff
changeset
|
705 .Pn rm |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
706 without arguments because the first hash character starts a comment |
72
bae9273b5802
Wrote about configure options (not finished yet).
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parents:
69
diff
changeset
|
707 that reaches until the end of the line. |
bae9273b5802
Wrote about configure options (not finished yet).
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parents:
69
diff
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|
708 To delete the backup files, |
bae9273b5802
Wrote about configure options (not finished yet).
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parents:
69
diff
changeset
|
709 .Cl "rm ./#13 ./#15" |
bae9273b5802
Wrote about configure options (not finished yet).
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parents:
69
diff
changeset
|
710 needs to be used. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
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|
711 Thus, using the hash as backup prefix may be seen as a precaution |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
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|
712 against backup loss. |
78 | 713 .P |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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157
diff
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|
714 First, I removed the configure option but added the profile entry |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
715 .Pe Backup-Prefix , |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
716 which allowed to specify an arbitrary string as backup prefix |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
717 .Ci 6c40d481d661d532dd527eaf34cebb6d3f8ed086 . |
76
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
718 This change did not remove the choice but moved it to a location where |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
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diff
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|
719 it suited better, in my eyes. |
76
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
720 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
721 Eventually however, the new trash folder concept |
154
63e885fb48ba
Converted some internal references to the new macros.
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parents:
145
diff
changeset
|
722 (cf. Sec. |
63e885fb48ba
Converted some internal references to the new macros.
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parents:
145
diff
changeset
|
723 .Cf trash-folder ) |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
159
diff
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|
724 removed the need for the backup prefix completely. |
78 | 725 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173 |
133
02660c14f6a8
Further re-ordering of the sections.
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parents:
131
diff
changeset
|
726 .Ci ca0b3e830b86700d9e5e31b1784de2bdcaf58fc5 |
02660c14f6a8
Further re-ordering of the sections.
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parents:
131
diff
changeset
|
727 |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
728 |
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
729 .U3 "Editor and Pager |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
730 .P |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
731 The two configure options |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
732 .CW --with-editor=EDITOR |
cefaa856d431
A lot of new text about configure switches.
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parents:
72
diff
changeset
|
733 .CW --with-pager=PAGER |
cefaa856d431
A lot of new text about configure switches.
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parents:
72
diff
changeset
|
734 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
|
735 Doing so at configure time made sense in the eighties, |
76
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
736 when the set of available editors and pagers varied much across |
2e61e0004a8f
Rework of existing text.
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parents:
74
diff
changeset
|
737 different systems. |
89 | 738 Today, the situation is more homogeneous. |
74
cefaa856d431
A lot of new text about configure switches.
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parents:
72
diff
changeset
|
739 The programs |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
740 .Pn vi |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
741 and |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
742 .Pn more |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
743 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
|
744 as they are specified by POSIX since two decades. |
cefaa856d431
A lot of new text about configure switches.
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parents:
72
diff
changeset
|
745 (The specifications for |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
746 .Pn vi |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
747 and |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
748 .Pn more |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
749 appeared in |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
750 .[ |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
751 posix 1987 |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
752 .] |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
753 and, |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
754 .[ |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
755 posix 1992 |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
756 .] |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
757 respectively.) |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
758 As a first step, these two tools were hard-coded as defaults |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
759 .Ci 5d43a99db70c12a673028c7758c20cbe3e13ef5f . |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
760 Not changed were the |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
761 .Pe editor |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
762 and |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
763 .Pe moreproc |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
764 profile entries, which allowed the user to override the system defaults. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
765 Later, the concept was reworked again to respect the standard |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
766 environment variables |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
767 .Ev VISUAL |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
768 and |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
769 .Ev PAGER |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
770 if they are set. |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
771 Today, mmh determines the editor to use in the following order, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
772 taking the first available and non-empty item |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
773 .Ci f85f4b7ae62e3d05a945dcd46ead51f0a2a89a9b : |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
774 .LI 1 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
775 Environment variable |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
776 .Ev MMHEDITOR |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
777 .LI 2 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
778 Profile entry |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
779 .Pe Editor |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
780 .LI 3 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
781 Environment variable |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
782 .Ev VISUAL |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
783 .LI 4 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
784 Environment variable |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
785 .Ev EDITOR |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
786 .LI 5 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
787 Command |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
788 .Pn vi . |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
789 .LP |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
790 The pager to use is determined in a similar order |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
791 .Ci 0c4214ea2aec6497d0d67b436bbee9bc1d225f1e : |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
792 .LI 1 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
793 Environment variable |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
794 .Ev MMHPAGER |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
795 .LI 2 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
796 Profile entry |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
797 .Pe Pager |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
798 (replaces |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
799 .Pe moreproc ) |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
800 .LI 3 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
801 Environment variable |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
802 .Ev PAGER |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
803 .LI 4 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
804 Command |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
805 .Pn more . |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
806 .LP |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
807 By respecting the |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
808 .Ev VISUAL /\c |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
809 .Ev EDITOR |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
810 and |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
811 .Ev PAGER |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
812 environment variables, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
813 the new behavior complies with the common style on Unix systems. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
814 It is more uniform and clearer for users. |
72
bae9273b5802
Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents:
69
diff
changeset
|
815 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
816 |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
817 .U3 "ndbm |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
818 .P |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
819 .Pn slocal |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
820 used to depend on the database library |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
821 .I ndbm . |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
822 The database is used to store the |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
823 .Hd Message-ID |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
824 header field values of all messages delivered. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
825 This enabled |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
826 .Pn slocal |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
827 to suppress delivering the same message to the same user twice. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
828 This features was enabled by the |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
829 .Sw -suppressdup |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
830 switch. |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
831 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
832 As a variety of versions of the database library exist, |
78 | 833 .[ |
834 wolter unix incompat notes dbm | |
835 .] | |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
836 complicated autoconf code was needed to detect them correctly. |
181
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
837 Furthermore, the configure switches |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
838 .Sw --with-ndbm=ARG |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
839 and |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
840 .Sw --with-ndbmheader=ARG |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
841 were added to help with difficult setups that would |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
842 not be detected automatically or not correctly. |
72
bae9273b5802
Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents:
69
diff
changeset
|
843 .P |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
844 By removing the suppress duplicates feature of |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
845 .Pn slocal , |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
846 the dependency on |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
847 .I ndbm |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
848 vanished and 120 lines of complex autoconf code could be saved |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
849 .Ci ecd6d6a20cb7a1507e3a20d6c4cb3a1cf14c6bbf . |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
850 The change removed functionality but that is considered minor to the |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
851 improvement of dropping the dependency and the complex autoconf code. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
852 .\" XXX argument: slocal ist sowieso nicht teil vom mmh kern |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
853 |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
854 .U3 "MH-E Support |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
855 .P |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
856 The configure option |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
857 .Sw --disable-mhe |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
858 was removed when the MH-E support was reworked. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
859 MH-E is the Emacs front-end to MH. |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
860 It requires MH to provide minor additional functions. |
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
861 The |
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
862 .Sw --disable-mhe |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
863 configure option had switched off these extensions. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
864 After removing the support for old versions of MH-E, |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
865 only the |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
866 .Sw -build |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
867 switches of |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
868 .Pn forw |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
869 and |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
870 .Pn repl |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
871 are left to be MH-E extensions. |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
872 They are now always built in because they add little code and complexity. |
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
873 In consequence, the |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
874 .Sw --disable-mhe |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
875 configure option was removed |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
876 .Ci a7ce7b4a580d77b6c2c4d980812beb589aa4c643 . |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
877 Dropping the option also removed a variant of the code base |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
878 that would have needed to be tested. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
879 This change was undertaken in January 2012 in nmh and |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
880 thereafter merged into mmh. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
881 |
72
bae9273b5802
Wrote about configure options (not finished yet).
markus schnalke <meillo@marmaro.de>
parents:
69
diff
changeset
|
882 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
883 .U3 "Masquerading |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
884 .P |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
885 The configure option |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
886 .Sw --enable-masquerade |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
887 could take up to three arguments: |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
888 .Ar draft_from , |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
889 .Ar mmailid , |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
890 and |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
891 .Ar username_extension . |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
892 They activated different types of address masquerading. |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
893 All of them were implemented in the SMTP-speaking |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
894 .Pn post |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
895 command. |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
896 Address masquerading is an MTA's task and mmh does not cover |
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
897 this field anymore. |
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
898 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
|
899 .P |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
900 The |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
901 .I mmailid |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
902 masquerading type is the oldest one of the three and the only one |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
903 available in the original MH. |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
904 It provided a |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
905 .I username |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
906 to |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
907 .I fakeusername |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
908 mapping, based on the |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
909 .Fn passwd 's |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
910 GECOS field. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
911 Nmh's man page |
181
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
markus schnalke <meillo@marmaro.de>
parents:
180
diff
changeset
|
912 .Mp mh-tailor (5) |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
913 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
|
914 .QS |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
915 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
|
916 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
|
917 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
|
918 `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
|
919 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
|
920 ``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
|
921 .QE |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
922 .P |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
923 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
|
924 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
|
925 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
|
926 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
|
927 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
|
928 mail software on the system. |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
929 Hence, mmailid masquerading was removed. |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
930 .Ci 0836c8000ccb34b59410ef1c15b1b7feac70ce5f |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
931 .P |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
932 The |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
933 .I username_extension |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
934 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
|
935 specified by the |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
936 .Ev USERNAME_EXTENSION |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
937 environment variable, to it. |
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
938 This provided support for the |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
939 .I user-extension |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
940 feature of qmail |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
941 .[ [ |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
942 sill qmail handbook |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
943 .], p. 141] |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
944 and the similar |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
945 .I "plussed user |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
946 processing of Sendmail. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
947 .[ [ |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
948 sendmail costales |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
949 .], p. 476] |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
950 The decision to remove this username_extension masquerading |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
951 was motivated by the fact that |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
952 .Pn spost |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
953 had not supported it yet. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
954 Username extensions can be used in mmh, but less convenient. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
955 .\" XXX covered by next paragraph |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
956 .\" XXX format file %(getenv USERNAME_EXTENSION) |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
957 .Ci 2abae0bfd0ad5bf898461e50aa4b466d641f23d9 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
958 .P |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
959 The |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
960 .I draft_from |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
961 masquerading type instructed |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
962 .Pn post |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
963 to use the value of the |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
964 .Hd From |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
965 header field as SMTP envelope sender. |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
966 Sender addresses could be replaced completely. |
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
967 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
|
968 with technical differences. |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
969 As mmh does not transfer messages itself, the local MTA has final control |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
970 over the sender's address. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
971 Any masquerading mmh introduces may be reverted by the MTA. |
76
2e61e0004a8f
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
74
diff
changeset
|
972 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
|
973 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
|
974 Nonetheless, the MUA can set the |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
975 .Hd From |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
976 header field and thereby propose a sender address to the MTA. |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
977 The MTA may then decide to take that one or generate the canonical sender |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
978 address for use as envelope sender address. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
979 .Ci b14ea6073f77b4359aaf3fddd0e105989db9 |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
980 .P |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
981 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
|
982 message header (\c |
74
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
983 .Pn sendmail 's |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
984 .Sw -t |
cefaa856d431
A lot of new text about configure switches.
markus schnalke <meillo@marmaro.de>
parents:
72
diff
changeset
|
985 switch). |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
986 The |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
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987 .Hd From |
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988 header field of the draft may be set arbitrary by the user. |
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989 If it is missing, the canonical sender address will be generated by the MTA. |
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990 |
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991 .U3 "Remaining Options |
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992 .P |
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993 Two configure options remain in mmh. |
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994 One is the locking method to use: |
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995 .Sw --with-locking=[dot|fcntl|flock|lockf] . |
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996 The idea of removing all methods except the portable |
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A big bunch of corrections in 2.1 and 2.2.
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997 .I "dot locking |
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998 and having that one as the default is appealing, but this change |
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Rework of existing text.
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999 requires deeper technical investigation into the topic. |
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1000 The other option, |
74
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1001 .Sw --enable-debug , |
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1002 compiles the programs with debugging symbols. |
74
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1003 This option is likely to stay. |
72
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1004 |
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1005 |
58
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Restructured the content in ch03.
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1006 |
63 | 1007 |
100
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Included changes proposed by Lydi.
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1008 .H2 "Command Line Switches |
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1009 .P |
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1010 The command line switches of MH tools follow a style similar to |
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1011 the X Window System style. |
171
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1012 .\" XXX ref |
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1013 The switches consist of a single dash (`\fL-\fP') followed by a word. |
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1014 For example |
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1015 .Cl -truncate . |
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1016 To ease typing, the word can be abbreviated, given the remaining |
217
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1017 prefix is unambiguous. |
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1018 If no other switch starts with the letter `t', then any of |
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1019 .Cl "-truncate" , |
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Various improvements and rework.
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1020 .Cl "-trunc" , |
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Various improvements and rework.
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|
1021 .Cl "-tr" , |
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Various improvements and rework.
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|
1022 and |
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Various improvements and rework.
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|
1023 .Cl "-t |
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Various improvements and rework.
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|
1024 is equal. |
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Various improvements and rework.
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1025 As a result, switches can neither be grouped (as in |
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Various improvements and rework.
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1026 .Cl "ls -ltr" ) |
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Various improvements and rework.
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1027 nor can switch arguments be appended directly to the switch (as in |
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Various improvements and rework.
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1028 .Cl "sendmail -q30m" ). |
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Various improvements and rework.
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1029 Many switches have negating counter-parts, which start with `no'. |
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Various improvements and rework.
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1030 For example |
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Various improvements and rework.
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1031 .Cl "-notruncate |
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Various improvements and rework.
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|
1032 inverts the |
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Various improvements and rework.
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|
1033 .Cl "-truncate |
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Various improvements and rework.
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|
1034 switch. |
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Various improvements and rework.
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1035 They exist to override the effect of default switches in the profile. |
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1036 Every program in mmh has two generic switches: |
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1037 .Sw -help , |
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1038 to print a short message on how to use the program, and |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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1039 .Sw -Version |
164
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Reacted to suggestions by Aaron Mueller.
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1040 (with capital `V'), to tell what version of mmh the program belongs to. |
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1041 .P |
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1042 Switches change the behavior of programs. |
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1043 Programs that do one thing in one way require no switches. |
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1044 In most cases, doing something in exactly one way is too limiting. |
217
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1045 If one task should be accomplished in various ways, |
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A big bunch of corrections in 2.1 and 2.2.
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1046 switches are a good approach to alter the behavior of a program. |
93
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1047 Changing the behavior of programs provides flexibility and customization |
217
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1048 to users, but at the same time it complicates the code, |
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A big bunch of corrections in 2.1 and 2.2.
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1049 the documentation, and the usage of the program. |
97
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1050 .\" XXX: Ref |
93
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1051 Therefore, the number of switches should be kept small. |
217
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1052 A small set of well-chosen switches is best. |
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A big bunch of corrections in 2.1 and 2.2.
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1053 Usually, the number of switches increases over time. |
93
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1054 Already in 1985, Rose and Romine have identified this as a major |
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1055 problem of MH: |
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1056 .[ [ |
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1057 rose romine real work |
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1058 .], p. 12] |
98
d894191d7a33
style: Changed the block quote approach. New QS and QE.
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1059 .QS |
93
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1060 A complaint often heard about systems which undergo substantial development |
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1061 by many people over a number of years, is that more and more options are |
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1062 introduced which add little to the functionality but greatly increase the |
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1063 amount of information a user needs to know in order to get useful work done. |
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1064 This is usually referred to as creeping featurism. |
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1065 .QP |
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1066 Unfortunately MH, having undergone six years of off-and-on development by |
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1067 ten or so well-meaning programmers (the present authors included), |
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1068 suffers mightily from this. |
98
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1069 .QE |
93
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1070 .P |
217
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1071 Being reluctant to adding new switches (or \fIoptions\fP, |
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A big bunch of corrections in 2.1 and 2.2.
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1072 as Rose and Romine call them) is one part of a counter-action, |
97
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1073 the other part is removing hardly used switches. |
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1074 Nmh's tools have lots of switches already implemented. |
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1075 Hence, cleaning up by removing some of them was the more important part |
97
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1076 of the counter-action. |
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1077 Removing existing functionality is always difficult because it |
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1078 breaks programs that use these functions. |
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1079 Also, for every obsolete feature, there'll always be someone who still |
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1080 uses it and thus opposes its removal. |
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1081 This puts the developer into the position, |
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1082 where sensible improvements to style are regarded as destructive acts. |
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1083 Yet, living with the featurism is far worse, in my eyes, because |
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1084 future needs will demand adding further features, |
93
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1085 worsening the situation more and more. |
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1086 Rose and Romine added in a footnote, |
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1087 ``[...] |
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1088 .Pn send |
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1089 will no doubt acquire an endless number of switches in the years to come'' |
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1090 .[ [ |
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1091 rose romine real work |
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1092 .], p. 12]. |
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1093 Although clearly humorous, the comment points to the nature of the problem. |
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1094 Refusing to add any new switches would encounter the problem at its root, |
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1095 but this is not practical. |
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1096 New needs will require new switches and it would be unwise to block |
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1097 them strictly. |
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1098 Nevertheless, removing obsolete switches still is an effective approach |
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1099 to deal with the problem. |
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1100 Working on an experimental branch without an established user base, |
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1101 eased my work because I did not offend users when I removed existing |
110 | 1102 functions. |
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1103 .P |
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1104 Rose and Romine counted 24 visible and 9 more hidden switches for |
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1105 .Pn send . |
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1106 In nmh, they increased up to 32 visible and 12 hidden ones. |
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1107 At the time of writing, no more than 4 visible switches and 1 hidden switch |
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1108 have remained in mmh's |
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1109 .Pn send . |
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1110 These numbers include the two generic switches, |
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1111 .Sw -help |
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1112 and |
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1113 .Sw -Version . |
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1114 .P |
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1115 Hidden switches are ones not documented. |
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1116 In mmh, 12 tools have hidden switches. |
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1117 9 of them are |
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Explained `hidden switches'.
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1118 .Sw -debug |
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1119 switches, the other 6 provide special interfaces for internal use. |
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1120 .P |
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1121 The following figure displays the number of switches for each of the tools |
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1122 that is available in both nmh and mmh. |
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1123 The tools are sorted by the number of switches they had in nmh. |
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1124 Both visible and hidden switches were counted, |
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1125 but not the generic help and version switches. |
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1126 Whereas in the beginning of the project, the average tool had 11 switches, |
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1127 now it has no more than 5 \(en only half as many. |
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1128 If the `no' switches and similar inverse variant are folded onto |
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1129 their counter-parts, the average tool had 8 switches in pre-mmh times and |
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1130 has 4 now. |
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1131 The total number of functional switches in mmh dropped from 465 |
182
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1132 to 233. |
93
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1133 |
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1134 .KS |
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1135 .in 1c |
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1136 .so input/switches.grap |
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1137 .KE |
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1138 |
58
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Restructured the content in ch03.
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1139 .P |
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1140 A part of the switches vanished after functions were removed. |
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1141 This was the case for network mail transfer, for instance. |
97
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1142 Sometimes, however, the work flow was the other way: |
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1143 I looked through the |
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1144 .Mp mh-chart (7) |
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1145 man page to identify the tools with apparently too many switches. |
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1146 Then I considered the benefit of each switch by examining |
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1147 the tool's man page and source code, aided by literature research |
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1148 and testing. |
97
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1149 |
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1150 |
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1151 .U3 "Draft Folder Facility |
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1152 .P |
100
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1153 A change early in the project was the complete transition from |
217
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1154 the single draft message to the draft folder facility |
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1155 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860 . |
164
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1156 .\" XXX ref to section ... |
109
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1157 The draft folder facility was introduced in the mid-eighties, when |
100
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1158 Rose and Romine called it a ``relatively new feature''. |
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1159 .[ |
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1160 rose romine real work |
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1161 .] |
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1162 Since then, the facility was included, inactive by default. |
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1163 By making it permanently active and by related rework of the tools, the |
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1164 .Sw -[no]draftfolder , |
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1165 and |
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1166 .Sw -draftmessage |
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1167 switches could be removed from |
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1168 .Pn comp , |
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1169 .Pn repl , |
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1170 .Pn forw , |
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1171 .Pn dist , |
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1172 .Pn whatnow , |
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1173 and |
217
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1174 .Pn send |
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1175 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860 . |
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1176 The only flexibility lost with this change is having multiple |
97
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1177 draft folders within one profile. |
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1178 I consider this a theoretical problem only. |
159
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1179 At the same time, the |
93
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1180 .Sw -draft |
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1181 switch of |
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1182 .Pn anno , |
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1183 .Pn refile , |
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1184 and |
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1185 .Pn send |
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1186 was removed. |
159
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1187 The special treatment of \fIthe\fP draft message became irrelevant after |
217
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1188 the rework of the draft system |
159
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1189 (cf. Sec. |
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1190 .Cf draft-folder ). |
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1191 Furthermore, |
95
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1192 .Pn comp |
164
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1193 no longer needs a |
95
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1194 .Sw -file |
164
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1195 switch as the draft folder facility together with the |
95
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1196 .Sw -form |
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1197 switch are sufficient. |
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1198 |
95
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1199 |
102
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More text about attachments mainly, plus some rearrangements.
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1200 .U3 "In Place Editing |
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1201 .P |
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1202 .Pn anno |
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1203 had the switches |
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1204 .Sw -[no]inplace |
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1205 to either annotate the message in place and thus preserve hard links, |
217
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1206 or annotate a copy to replace the original message. |
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1207 The latter approach broke hard links. |
97
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1208 Following the assumption that linked messages should truly be the |
217
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1209 same message and annotating it should not break the link, the |
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1210 .Sw -[no]inplace |
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1211 switches were removed and the previous default |
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1212 .Sw -inplace |
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1213 was made the definitive behavior |
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1214 .Ci c8195849d2e366c569271abb0f5f60f4ebf0b4d0 . |
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1215 The |
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1216 .Sw -[no]inplace |
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1217 switches of |
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|
1218 .Pn repl , |
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1219 .Pn forw , |
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1220 and |
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1221 .Pn dist |
217
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A big bunch of corrections in 2.1 and 2.2.
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1222 could be removed, as well, as they were simply passed through to |
93
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1223 .Pn anno . |
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1224 .P |
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|
1225 .Pn burst |
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1226 also had |
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1227 .Sw -[no]inplace |
217
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A big bunch of corrections in 2.1 and 2.2.
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1228 switches, but with a different meaning. |
93
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1229 With |
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1230 .Sw -inplace , |
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1231 the digest had been replaced by the table of contents (i.e. the |
110 | 1232 introduction text) and the burst messages were placed right |
93
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1233 after this message, renumbering all following messages. |
95
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1234 Also, any trailing text of the digest was lost, though, |
93
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1235 in practice, it usually consists of an end-of-digest marker only. |
217
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A big bunch of corrections in 2.1 and 2.2.
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1236 Nonetheless, this behavior appeared less elegant than the |
95
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1237 .Sw -noinplace |
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1238 behavior, which already had been the default. |
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1239 Nmh's |
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1240 .Mp burst (1) |
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1241 man page reads: |
98
d894191d7a33
style: Changed the block quote approach. New QS and QE.
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1242 .QS |
164
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1243 If |
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Reacted to suggestions by Aaron Mueller.
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1244 .Sw -noinplace |
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Reacted to suggestions by Aaron Mueller.
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1245 is given, each digest is preserved, no table |
95
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1246 of contents is produced, and the messages contained within |
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1247 the digest are placed at the end of the folder. Other messages |
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1248 are not tampered with in any way. |
98
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style: Changed the block quote approach. New QS and QE.
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1249 .QE |
95
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1250 .LP |
93
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1251 The decision to drop the |
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1252 .Sw -inplace |
95
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1253 behavior was supported by the code complexity and the possible data loss |
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1254 it caused. |
93
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1255 .Sw -noinplace |
95
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1256 was chosen to be the definitive behavior. |
97
29a7454fcded
Added references to commits.
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1257 .Ci 68a686adeb39223a5e1ad35e4a24890ec053679d |
95
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1258 |
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1259 |
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1260 .U3 "Forms and Format Strings |
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More text about switches.
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1261 .P |
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1262 Historically, the tools that had |
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More text about switches.
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1263 .Sw -form |
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1264 switches to supply a form file had |
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1265 .Sw -format |
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1266 switches as well to supply the contents of a form file as a string |
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1267 on the command line directly. |
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1268 In consequence, the following two lines equaled: |
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1269 .VS |
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|
1270 scan -form scan.mailx |
217
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A big bunch of corrections in 2.1 and 2.2.
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1271 scan -format "`cat /path/to/scan.mailx`" |
95
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More text about switches.
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diff
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|
1272 VE |
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More text about switches.
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diff
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|
1273 The |
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More text about switches.
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diff
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|
1274 .Sw -format |
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More text about switches.
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|
1275 switches were dropped in favor for extending the |
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More text about switches.
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1276 .Sw -form |
217
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A big bunch of corrections in 2.1 and 2.2.
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1277 switches |
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A big bunch of corrections in 2.1 and 2.2.
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|
1278 .Ci f51956be123db66b00138f80464d06f030dbb88d . |
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A big bunch of corrections in 2.1 and 2.2.
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1279 If their argument starts with an equal sign (`\fL=\fP'), |
95
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1280 then the rest of the argument is taken as a format string, |
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1281 otherwise the arguments is treated as the name of a format file. |
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1282 Thus, now the following two lines equal: |
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More text about switches.
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|
1283 .VS |
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diff
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|
1284 scan -form scan.mailx |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
1285 scan -form "=`cat /path/to/scan.mailx`" |
95
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diff
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|
1286 VE |
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|
1287 This rework removed the prefix collision between |
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More text about switches.
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diff
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|
1288 .Sw -form |
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More text about switches.
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parents:
93
diff
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|
1289 and |
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diff
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|
1290 .Sw -format . |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
1291 Typing `\fL-fo\fP' is sufficient to specify form file or format string. |
95
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diff
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|
1292 .P |
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parents:
93
diff
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|
1293 The different meaning of |
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More text about switches.
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parents:
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diff
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|
1294 .Sw -format |
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diff
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|
1295 for |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
1296 .Pn forw |
95
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More text about switches.
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|
1297 and |
217
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A big bunch of corrections in 2.1 and 2.2.
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|
1298 .Pn repl |
95
edac7e46a9f2
More text about switches.
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parents:
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diff
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|
1299 was removed in mmh. |
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More text about switches.
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parents:
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diff
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|
1300 .Pn forw |
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More text about switches.
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parents:
93
diff
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|
1301 was completely switched to MIME-type forwarding, thus removing the |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
1302 .Sw -[no]format |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
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diff
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|
1303 .Ci 6e271608b7b9c23771523f88d23a4d3593010cf1 . |
95
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More text about switches.
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diff
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|
1304 For |
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parents:
93
diff
changeset
|
1305 .Pn repl , |
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More text about switches.
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parents:
93
diff
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|
1306 the |
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More text about switches.
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diff
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|
1307 .Sw -[no]format |
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More text about switches.
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parents:
93
diff
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|
1308 switches were reworked to |
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parents:
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diff
changeset
|
1309 .Sw -[no]filter |
217
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A big bunch of corrections in 2.1 and 2.2.
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|
1310 switches |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
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diff
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|
1311 .Ci 67411b1f95d6ec987b4c732459e1ba8a8ac192c6 . |
95
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diff
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|
1312 The |
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diff
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|
1313 .Sw -format |
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More text about switches.
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parents:
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diff
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|
1314 switches of |
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parents:
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diff
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|
1315 .Pn send |
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More text about switches.
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parents:
93
diff
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|
1316 and |
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diff
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|
1317 .Pn post , |
217
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A big bunch of corrections in 2.1 and 2.2.
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diff
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|
1318 which had a third meaning, were removed likewise |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
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diff
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|
1319 .Ci f3cb7cde0e6f10451b6848678d95860d512224b9 . |
95
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|
1320 Eventually, the ambiguity of the |
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parents:
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diff
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|
1321 .Sw -format |
217
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A big bunch of corrections in 2.1 and 2.2.
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|
1322 switches is resolved by not having such switches anymore in mmh. |
95
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|
1323 |
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More text about switches.
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parents:
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diff
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|
1324 |
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diff
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|
1325 .U3 "MIME Tools |
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More text about switches.
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|
1326 .P |
217
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A big bunch of corrections in 2.1 and 2.2.
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diff
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|
1327 The MIME tools, which once were part of |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
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parents:
98
diff
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|
1328 .Pn mhn |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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|
1329 (whatever that stood for), |
95
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1330 had several switches that added little practical value to the programs. |
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|
1331 The |
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|
1332 .Sw -[no]realsize |
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More text about switches.
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parents:
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diff
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|
1333 switches of |
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More text about switches.
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parents:
93
diff
changeset
|
1334 .Pn mhbuild |
edac7e46a9f2
More text about switches.
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parents:
93
diff
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|
1335 and |
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parents:
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diff
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|
1336 .Pn mhlist |
217
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A big bunch of corrections in 2.1 and 2.2.
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1337 were removed |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1338 .Ci 8d8f1c3abc586c005c904e52c4adbfe694d2201c . |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1339 Real size calculations are done always now because nmh's |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1340 .Mp mhbuild (1) |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1341 man page states that |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1342 ``This provides an accurate count at the expense of a small delay'' |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1343 with the small delay not being noticable on modern systems. |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1344 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1345 The |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1346 .Sw -[no]check |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1347 switches were removed together with the support for |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1348 .Hd Content-MD5 |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1349 header fields [RFC\|1864] |
154
63e885fb48ba
Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents:
145
diff
changeset
|
1350 (cf. Sec. |
63e885fb48ba
Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents:
145
diff
changeset
|
1351 .Cf content-md5 ) |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1352 .Ci 31dc797eb5178970d68962ca8939da3fd9a8efda . |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1353 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1354 The |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1355 .Sw -[no]ebcdicsafe |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1356 and |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1357 .Sw -[no]rfc934mode |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1358 switches of |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1359 .Pn mhbuild |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1360 were removed because they are considered obsolete |
97
29a7454fcded
Added references to commits.
markus schnalke <meillo@marmaro.de>
parents:
96
diff
changeset
|
1361 .Ci 01a3480928da485b4d6109d36d751dfa71799d58 |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1362 .Ci 3363e2624dce0eb8164cf8b3f1ab385c8ff72e88 . |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1363 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1364 Content caching of external MIME parts, activated with the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1365 .Sw -rcache |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1366 and |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1367 .Sw -wcache |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1368 switches was completely removed |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1369 .Ci d1fefd9f614e4dc3cda16da6c69133c1b2005269 . |
97
29a7454fcded
Added references to commits.
markus schnalke <meillo@marmaro.de>
parents:
96
diff
changeset
|
1370 External MIME parts are rare today, having a caching facility |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1371 for them appears to be unnecessary. |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1372 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1373 In pre-MIME times, |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1374 .Pn mhl |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1375 had covered many tasks that are part of MIME handling today. |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1376 Therefore, |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1377 .Pn mhl |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1378 could be simplified to a large extend, reducing the number of its |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1379 switches from 21 to 6 |
97
29a7454fcded
Added references to commits.
markus schnalke <meillo@marmaro.de>
parents:
96
diff
changeset
|
1380 .Ci 350ad6d3542a07639213cf2a4fe524e829c1e7b6 |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1381 .Ci 0e46503be3c855bddaeae3843e1b659279c35d70 . |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1382 |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1383 |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1384 |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1385 |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1386 .U3 "Header Printing |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1387 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1388 .Pn folder 's |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1389 data output is self-explaining enough that |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1390 displaying the header line makes little sense. |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1391 Hence, the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1392 .Sw -[no]header |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1393 switch was removed and headers are never printed |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1394 .Ci 601cc73d1fa05ce96faa728f036d6c51b91701c7 . |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1395 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1396 In |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1397 .Pn mhlist , |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1398 the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1399 .Sw -[no]header |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1400 switches were removed, as well |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1401 .Ci b24f96523aaf60e44e04a3ffb1d22e69a13a602f . |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1402 In this case, the headers are printed always because the output |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1403 is not self-explaining. |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1404 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1405 .Pn scan |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1406 also had |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1407 .Sw -[no]header |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1408 switches. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1409 Printing this header had been sensible until the introduction of |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1410 format strings made it impossible to display column headings. |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1411 Only the folder name and the current date remained to be printed. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1412 As this information can be perfectly generated with |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1413 .Pn folder |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1414 and |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1415 .Pn date , |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1416 the switches were removed |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1417 .Ci c477dc5d1d03fa6d9a8ab3dd3508c63cbddc044e . |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1418 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1419 By removing all |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1420 .Sw -header |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1421 switches, the collision with |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1422 .Sw -help |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1423 on the first two letters was resolved. |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1424 Currently, |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1425 .Sw -h |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1426 evaluates to |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1427 .Sw -help |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1428 for all tools of mmh. |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1429 |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1430 |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1431 .U3 "Suppressing Edits or the Invocation of the WhatNow Shell |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1432 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1433 The |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1434 .Sw -noedit |
100
6ae7dc4a3a02
Included changes proposed by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
98
diff
changeset
|
1435 switch of |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1436 .Pn comp , |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1437 .Pn repl , |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1438 .Pn forw , |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1439 .Pn dist , |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1440 and |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1441 .Pn whatnow |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1442 was removed and replaced by specifying |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1443 .Sw -editor |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1444 with an empty argument |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1445 .Ci 75fca31a5b9d5c1a99c74ab14c94438d8852fba9 . |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1446 (Specifying |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1447 .Cl "-editor /bin/true |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1448 is nearly the same. It differs only in setting the previous editor.) |
93
093ccf39a45e
Write text about removal of switches; Included the grap figure.
markus schnalke <meillo@marmaro.de>
parents:
89
diff
changeset
|
1449 .P |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1450 The more important change is the removal of the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1451 .Sw -nowhatnowproc |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1452 switch |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1453 .Ci ee4f43cf2ef0084ec698e4e87159a94c01940622 . |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1454 This switch had once introduced an awkward behavior, |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1455 as explained in nmh's man page for |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1456 .Mp comp (1): |
98
d894191d7a33
style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents:
97
diff
changeset
|
1457 .QS |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1458 The |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1459 .Sw -editor |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1460 .Ar editor |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1461 switch indicates the editor to use for |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1462 the initial edit. Upon exiting from the editor, |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1463 .Pn comp |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1464 will invoke the |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1465 .Pn whatnow |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1466 program. See |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1467 .Mp whatnow (1) |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1468 for a discussion of available options. |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1469 The invocation of this program can be |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1470 inhibited by using the |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1471 .Sw -nowhatnowproc |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1472 switch. (In truth of fact, it is the |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1473 .Pn whatnow |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1474 program which starts the initial edit. |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1475 Hence, |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1476 .Sw -nowhatnowproc |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1477 will prevent any edit from occurring.) |
98
d894191d7a33
style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents:
97
diff
changeset
|
1478 .QE |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1479 .P |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1480 Effectively, the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1481 .Sw -nowhatnowproc |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1482 switch caused only only a draft message to be created. |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1483 As |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1484 .Cl "-whatnowproc /bin/true |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1485 does the same, the |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1486 .Sw -nowhatnowproc |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1487 switch was removed for being redundant. |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1488 |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1489 |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1490 |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1491 .U3 "Various |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1492 .BU |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1493 With the removal of MMDF maildrop format support, |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1494 .Pn packf |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1495 and |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1496 .Pn rcvpack |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1497 no longer needed their |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1498 .Sw -mbox |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1499 and |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1500 .Sw -mmdf |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1501 switches. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1502 The behavior of |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1503 .Sw -mbox |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1504 is the sole behavior now |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1505 .Ci 3916ab66ad5d183705ac12357621ea8661afd3c0 . |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
1506 Further rework in both tools made the |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1507 .Sw -file |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1508 switch unnecessary |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1509 .Ci ca1023716d4c2ab890696f3e41fa0d94267a940e . |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1510 |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1511 .BU |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1512 Mmh's tools do no longer clear the screen (\c |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1513 .Pn scan 's |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1514 and |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1515 .Pn mhl 's |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1516 .Sw -[no]clear |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1517 switches |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1518 .Ci e57b17343dcb3ff373ef4dd089fbe778f0c7c270 |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1519 .Ci 943765e7ac5693ae177fd8d2b5a2440e53ce816e ). |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1520 Neither does |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1521 .Pn mhl |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1522 ring the bell (\c |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1523 .Sw -[no]bell |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1524 .Ci e11983f44e59d8de236affa5b0d0d3067c192e24 ) |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1525 nor does it page the output itself (\c |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1526 .Sw -length |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1527 .Ci 5b9d883db0318ed2b84bb82dee880d7381f99188 ). |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1528 .\" XXX Ref |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1529 Generally, the pager to use is no longer specified with the |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1530 .Sw -[no]moreproc |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1531 command line switches for |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1532 .Pn mhl |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1533 and |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1534 .Pn show /\c |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1535 .Pn mhshow |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1536 .Ci 39e87a75b5c2d3572ec72e717720b44af291e88a . |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1537 |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1538 .BU |
96 | 1539 In order to avoid prefix collisions among switch names, the |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1540 .Sw -version |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1541 switch was renamed to |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1542 .Sw -Version |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1543 (with capital `V') |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1544 .Ci 32b2354dbaf4bf934936eb5b102a4a3d2fdd209a . |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1545 Every program has the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1546 .Sw -version |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1547 switch but its first three letters collided with the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1548 .Sw -verbose |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1549 switch, present in many programs. |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1550 The rename solved this problem once for all. |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1551 Although this rename breaks a basic interface, having the |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1552 .Sw -V |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1553 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
|
1554 |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1555 .BU |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1556 .Sw -[no]preserve |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1557 of |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1558 .Pn refile |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
1559 was removed |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
1560 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173 |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
1561 because what use was it anyway? |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
1562 Quoting nmh's man page |
165
ea6eec1722d1
Improvement by Boris Kraut.
markus schnalke <meillo@marmaro.de>
parents:
164
diff
changeset
|
1563 .Mp refile (1): |
98
d894191d7a33
style: Changed the block quote approach. New QS and QE.
markus schnalke <meillo@marmaro.de>
parents:
97
diff
changeset
|
1564 .QS |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1565 Normally when a message is refiled, for each destination |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1566 folder it is assigned the number which is one above the current |
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1567 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
|
1568 .Sw -preserv |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1569 [sic!] switch will override this message renaming, and try |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1570 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
|
1571 particular folder occurs when using the |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1572 .Sw -preserve |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1573 switch, then |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1574 .Pn refile |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
1575 will use the next available message number which |
95
edac7e46a9f2
More text about switches.
markus schnalke <meillo@marmaro.de>
parents:
93
diff
changeset
|
1576 is above the message number you wish to preserve. |
98
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diff
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|
1577 .QE |
139
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Removed and moved some paragraphs.
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diff
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|
1578 |
95
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More text about switches.
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diff
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|
1579 .BU |
edac7e46a9f2
More text about switches.
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diff
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|
1580 The removal of the |
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More text about switches.
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|
1581 .Sw -[no]reverse |
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More text about switches.
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diff
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|
1582 switches of |
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More text about switches.
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diff
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|
1583 .Pn scan |
97
29a7454fcded
Added references to commits.
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diff
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|
1584 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173 |
217
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|
1585 is a bug fix. |
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1586 This is supported by the comments |
95
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More text about switches.
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|
1587 ``\-[no]reverse under #ifdef BERK (I really HATE this)'' |
edac7e46a9f2
More text about switches.
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|
1588 by Rose and |
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More text about switches.
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|
1589 ``Lists messages in reverse order with the `\-reverse' switch. |
217
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1590 This should be considered a bug'' by Romine in the changelogs. |
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1591 The question remains why neither Rose nor Romine have fixed this |
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|
1592 bug in the eighties when they wrote these comments. |
58
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diff
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|
1593 |
814c33b96d89
Restructured the content in ch03.
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diff
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|
1594 |
814c33b96d89
Restructured the content in ch03.
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|
1595 |
102
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More text about attachments mainly, plus some rearrangements.
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diff
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|
1596 |
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More text about attachments mainly, plus some rearrangements.
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|
1597 |
95
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More text about switches.
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|
1598 |
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More text about switches.
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|
1599 |
133
02660c14f6a8
Further re-ordering of the sections.
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|
1600 .\" -------------------------------------------------------------- |
74
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A lot of new text about configure switches.
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1601 .H1 "Modernizing |
102
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1602 .P |
164
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|
1603 In the more than thirty years of MH's existence, its code base was |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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1604 increasingly extended. |
118
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Wrote intro to Modernizing and new text about Code Style.
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1605 New features entered the project and became alternatives to the |
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1606 existing behavior. |
217
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A big bunch of corrections in 2.1 and 2.2.
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|
1607 Relics from several decades have gathered in the code base |
118
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Wrote intro to Modernizing and new text about Code Style.
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1608 but seldom obsolete features were dropped. |
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Wrote intro to Modernizing and new text about Code Style.
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diff
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1609 This section describes the removing of old code |
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Wrote intro to Modernizing and new text about Code Style.
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|
1610 and the modernizing of the default setup. |
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Wrote intro to Modernizing and new text about Code Style.
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diff
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|
1611 It focuses on the functional aspect only; |
154
63e885fb48ba
Converted some internal references to the new macros.
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diff
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|
1612 the non-functional aspects of code style are discussed in Sec. |
63e885fb48ba
Converted some internal references to the new macros.
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diff
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|
1613 .Cf code-style . |
58
814c33b96d89
Restructured the content in ch03.
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51
diff
changeset
|
1614 |
814c33b96d89
Restructured the content in ch03.
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51
diff
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|
1615 |
212
9317d789cef9
Various improvements and rework.
markus schnalke <meillo@marmaro.de>
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200
diff
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|
1616 .H2 "Code Relics |
12
7ca384d68edc
Wrote some text for removal of old code.
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parents:
0
diff
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|
1617 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
1618 My position regarding the removal of obsolete code |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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parents:
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|
1619 is much more revolutional than the nmh community appreciates. |
217
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A big bunch of corrections in 2.1 and 2.2.
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|
1620 Working on an experimental version, I was able to quickly drop |
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A big bunch of corrections in 2.1 and 2.2.
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diff
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|
1621 functionality that I considered ancient. |
104 | 1622 The need for consensus with peers would have slowed this process down. |
1623 Without the need to justify my decisions, I was able to rush forward. | |
217
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A big bunch of corrections in 2.1 and 2.2.
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|
1624 .P |
110 | 1625 In December 2011, Paul Vixie motivated the nmh developers to just |
104 | 1626 do the work: |
1627 .[ | |
1628 paul vixie edginess nmh-workers | |
1629 .] | |
1630 .QS | |
1631 let's stop walking on egg shells with this code base. there's no need to | |
1632 discuss whether to keep using vfork, just note in [sic!] passing, [...] | |
1633 we don't need a separate branch for removing vmh | |
1634 or ridding ourselves of #ifdef's or removing posix replacement functions | |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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|
1635 or depending on pure ansi/posix ``libc''. |
104 | 1636 .QP |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
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diff
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|
1637 these things should each be a day or two of work and the ``main branch'' |
104 | 1638 should just be modern. [...] |
1639 let's push forward, aggressively. | |
1640 .QE | |
1641 .LP | |
1642 I did so already in the months before. | |
1643 I pushed forward. | |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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|
1644 .\" XXX semicolon ? |
104 | 1645 I simply dropped the cruft. |
1646 .P | |
1647 The decision to drop a feature was based on literature research and | |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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|
1648 careful thinking, but whether having had contact with this particular |
104 | 1649 feature within my own computer life served as a rule of thumb. |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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|
1650 I explained my reasons in the commit messages |
109
2b094b8fb422
Rework of existing text.
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parents:
108
diff
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|
1651 in the version control system. |
104 | 1652 Hence, others can comprehend my view and argue for undoing the change |
1653 if I have missed an important aspect. | |
109
2b094b8fb422
Rework of existing text.
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diff
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|
1654 I was quick in dropping parts. |
179
b59201e345e5
Applied further corrections by Aaron.
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parents:
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diff
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|
1655 I rather include falsely dropped parts again, than going at a slower pace. |
b59201e345e5
Applied further corrections by Aaron.
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diff
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|
1656 Mmh is experimental work; it requires tough decisions. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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|
1657 .\" XXX ``exp. work'' schon oft gesagt |
12
7ca384d68edc
Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents:
0
diff
changeset
|
1658 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
1659 |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
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|
1660 .U3 "Process Forking |
0
dc2bfef4cda7
Initial commit: Basic structure, macros and fonts.
markus schnalke <meillo@marmaro.de>
parents:
diff
changeset
|
1661 .P |
109
2b094b8fb422
Rework of existing text.
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diff
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|
1662 Being a tool chest, MH creates many processes. |
104 | 1663 In earlier times |
1664 .Fu fork() | |
1665 had been an expensive system call, because the process's image needed | |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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diff
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|
1666 to be completely duplicated at once. |
200 | 1667 This expensive work was especially unnecessary in the commonly occurring |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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diff
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|
1668 case wherein the image is replaced by a call to |
104 | 1669 .Fu exec() |
1670 right after having forked the child process. | |
1671 The | |
1672 .Fu vfork() | |
1673 system call was invented to speed up this particular case. | |
1674 It completely omits the duplication of the image. | |
1675 On old systems this resulted in significant speed ups. | |
1676 Therefore MH used | |
1677 .Fu vfork() | |
1678 whenever possible. | |
12
7ca384d68edc
Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents:
0
diff
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|
1679 .P |
104 | 1680 Modern memory management units support copy-on-write semantics, which make |
1681 .Fu fork() | |
1682 almost as fast as | |
1683 .Fu vfork() . | |
1684 The man page of | |
1685 .Mp vfork (2) | |
1686 in FreeBSD 8.0 states: | |
1687 .QS | |
1688 This system call will be eliminated when proper system sharing mechanisms | |
1689 are implemented. Users should not depend on the memory sharing semantics | |
1690 of vfork() as it will, in that case, be made synonymous to fork(2). | |
1691 .QE | |
1692 .LP | |
1693 Vixie supports the removal with the note that ``the last | |
1694 system on which fork was so slow that an mh user would notice it, was | |
1695 Eunice. that was 1987''. | |
1696 .[ | |
1697 nmh-workers vixie edginess | |
1698 .] | |
1699 I replaced all calls to | |
1700 .Fu vfork() | |
1701 with calls to | |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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diff
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|
1702 .Fu fork() |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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212
diff
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|
1703 .Ci 40821f5c1316e9205a08375e7075909cc9968e7d . |
12
7ca384d68edc
Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents:
0
diff
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|
1704 .P |
104 | 1705 Related to the costs of |
1706 .Fu fork() | |
1707 is the probability of its success. | |
109
2b094b8fb422
Rework of existing text.
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diff
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|
1708 In the eighties, on heavy loaded systems, calls to |
104 | 1709 .Fu fork() |
1710 were prone to failure. | |
1711 Hence, many of the | |
1712 .Fu fork() | |
1713 calls in the code were wrapped into loops to retry the | |
1714 .Fu fork() | |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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diff
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|
1715 several times, to increase the chances to succeed eventually. |
109
2b094b8fb422
Rework of existing text.
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parents:
108
diff
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|
1716 On modern systems, a failing |
104 | 1717 .Fu fork() |
109
2b094b8fb422
Rework of existing text.
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parents:
108
diff
changeset
|
1718 call is unusual. |
104 | 1719 Hence, in the rare case when |
1720 .Fu fork() | |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
1721 fails, mmh programs simply abort |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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212
diff
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|
1722 .Ci 5fbf37ee68e018998ada61eeab73e035b26834b6 . |
12
7ca384d68edc
Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents:
0
diff
changeset
|
1723 |
104 | 1724 |
109
2b094b8fb422
Rework of existing text.
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108
diff
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|
1725 .U3 "Header Fields |
104 | 1726 .BU |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
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|
1727 The |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
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diff
changeset
|
1728 .Hd Encrypted |
104 | 1729 header field was introduced by RFC\|822, |
109
2b094b8fb422
Rework of existing text.
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diff
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|
1730 but already marked as legacy in RFC\|2822. |
2b094b8fb422
Rework of existing text.
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diff
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|
1731 Today, OpenPGP provides the basis for standardized exchange of encrypted |
104 | 1732 messages [RFC\|4880, RFC\|3156]. |
109
2b094b8fb422
Rework of existing text.
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diff
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|
1733 Hence, the support for |
104 | 1734 .Hd Encrypted |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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diff
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|
1735 header fields is removed in mmh |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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212
diff
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|
1736 .Ci 064527f7b57ab050e5af13e15ad99aeeab125857 . |
104 | 1737 .BU |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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|
1738 The native support for |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
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parents:
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diff
changeset
|
1739 .Hd Face |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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diff
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|
1740 header fields has been removed, as well |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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diff
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|
1741 .Ci 8e5be81f784682822f5e868c1bf3c8624682bd23 . |
104 | 1742 This feature is similar to the |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
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diff
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|
1743 .Hd X-Face |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
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parents:
82
diff
changeset
|
1744 header field in its intent, |
21
bb8a8be49024
Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents:
20
diff
changeset
|
1745 but takes a different approach to store the image. |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
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parents:
82
diff
changeset
|
1746 Instead of encoding the image data directly into the header field, |
109
2b094b8fb422
Rework of existing text.
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diff
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|
1747 it contains the hostname and UDP port where the image |
2b094b8fb422
Rework of existing text.
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diff
changeset
|
1748 date can be retrieved. |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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diff
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|
1749 There is even a third Face system, |
109
2b094b8fb422
Rework of existing text.
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108
diff
changeset
|
1750 which is the successor of |
2b094b8fb422
Rework of existing text.
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parents:
108
diff
changeset
|
1751 .Hd X-Face , |
2b094b8fb422
Rework of existing text.
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parents:
108
diff
changeset
|
1752 although it re-uses the |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
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parents:
82
diff
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|
1753 .Hd Face |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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diff
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|
1754 header field name. |
109
2b094b8fb422
Rework of existing text.
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diff
changeset
|
1755 It was invented in 2005 and supports colored PNG images. |
104 | 1756 None of the Face systems described here is popular today. |
1757 Hence, mmh has no direct support for them. | |
1758 .BU | |
154
63e885fb48ba
Converted some internal references to the new macros.
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parents:
145
diff
changeset
|
1759 .Id content-md5 |
104 | 1760 The |
1761 .Hd Content-MD5 | |
1762 header field was introduced by RFC\|1864. | |
1763 It provides detection of data corruption during the transfer. | |
1764 But it can not ensure verbatim end-to-end delivery of the contents | |
1765 [RFC\|1864]. | |
1766 The proper approach to verify content integrity in an | |
166
f102dcc06bb9
s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents:
165
diff
changeset
|
1767 end-to-end relationship is the use of digital signatures. |
104 | 1768 .\" XXX (RFCs FIXME). |
1769 On the other hand, transfer protocols should detect corruption during | |
109
2b094b8fb422
Rework of existing text.
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parents:
108
diff
changeset
|
1770 the transmission. |
2b094b8fb422
Rework of existing text.
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parents:
108
diff
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|
1771 The TCP includes a checksum field therefore. |
104 | 1772 These two approaches in combinations render the |
1773 .Hd Content-MD5 | |
1774 header field superfluous. | |
109
2b094b8fb422
Rework of existing text.
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108
diff
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|
1775 Not a single one out of 4\|200 messages from two decades |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
1776 in the nmh-workers mailing list archive |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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212
diff
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|
1777 .[ |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
1778 nmh-workers mailing list archive website |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
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|
1779 .] |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
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|
1780 contains a |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
1781 .Hd Content-MD5 |
104 | 1782 header field. |
1783 Neither did any of the 60\|000 messages in my personal mail storage. | |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
1784 Removing the support for this header field |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
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|
1785 .Ci 31dc797eb5178970d68962ca8939da3fd9a8efda , |
104 | 1786 removed the last place where MD5 computation was needed. |
1787 Hence, the MD5 code could be removed as well. | |
1788 Over 500 lines of code vanished by this one change. | |
1789 | |
1790 | |
1791 .U3 "MMDF maildrop support | |
1792 .P | |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1793 This type of maildrop format is conceptionally similar to the mbox format, |
139
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1794 but uses a different message delimiter (`\fL\\1\\1\\1\\1\fP', |
b7b81ae9c9d8
Removed and moved some paragraphs.
markus schnalke <meillo@marmaro.de>
parents:
138
diff
changeset
|
1795 commonly written as `\fL^A^A^A^A\fP', instead of `\fLFrom\0\fP'). |
104 | 1796 Mbox is the de-facto standard maildrop format on Unix, |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1797 whereas the MMDF maildrop format is now forgotten. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
1798 Mbox remains as the only packed mailbox format, supported in mmh. |
104 | 1799 .P |
109
2b094b8fb422
Rework of existing text.
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parents:
108
diff
changeset
|
1800 The simplifications within the code were moderate. |
2b094b8fb422
Rework of existing text.
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parents:
108
diff
changeset
|
1801 Mainly, the reading and writing of MMDF mailbox files was removed. |
2b094b8fb422
Rework of existing text.
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parents:
108
diff
changeset
|
1802 But also, switches of |
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1803 .Pn packf |
104 | 1804 and |
109
2b094b8fb422
Rework of existing text.
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parents:
108
diff
changeset
|
1805 .Pn rcvpack |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
1806 could be removed |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
212
diff
changeset
|
1807 .Ci 3916ab66ad5d183705ac12357621ea8661afd3c0 . |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1808 In the message parsing function |
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1809 .Fn sbr/m_getfld.c , |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1810 knowledge of MMDF packed mail boxes was removed |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1811 .Ci 684ec30d81e1223a282764452f4902ed4ad1c754 . |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1812 Further code structure simplifications may be possible there, |
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1813 because only one single packed mailbox format is left to be supported. |
104 | 1814 I have not worked on them yet because |
1815 .Fu m_getfld() | |
1816 is heavily optimized and thus dangerous to touch. | |
1817 The risk of damaging the intricate workings of the optimized code is | |
1818 too high. | |
1819 | |
12
7ca384d68edc
Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents:
0
diff
changeset
|
1820 |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1821 .U3 "Prompter's Control Keys |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1822 .P |
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1823 The program |
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1824 .Pn prompter |
104 | 1825 queries the user to fill in a message form. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1826 When used as |
104 | 1827 .Cl "comp -editor prompter" , |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1828 the resulting behavior is similar to |
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1829 .Pn mailx . |
51 | 1830 Apparently, |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1831 .Pn prompter |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
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|
1832 had not been touched lately. |
104 | 1833 Otherwise it's hardly explainable why it |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1834 still offered the switches |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
1835 .Sw -erase |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
1836 .Ar chr |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1837 and |
84
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
1838 .Sw -kill |
c35ec2b7de5d
style: New macros .Ar (argument) and .Hd (header field)
markus schnalke <meillo@marmaro.de>
parents:
82
diff
changeset
|
1839 .Ar chr |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1840 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
|
1841 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
|
1842 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
|
1843 with the standard tool |
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1844 .Pn stty . |
104 | 1845 The switches are removed now |
1846 .Ci 0bd9750710cdbab80cfb4036dd87af20afe1552f . | |
20
7a100c80fa91
Some new text (show/mhshow; prompter).
markus schnalke <meillo@marmaro.de>
parents:
19
diff
changeset
|
1847 |
104 | 1848 |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1849 .U3 "Hardcopy Terminal Support |
21
bb8a8be49024
Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents:
20
diff
changeset
|
1850 .P |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1851 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
|
1852 hardcopy terminal. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1853 It remained in the code until spring 2012, when I finally removed it |
104 | 1854 .Ci b7764c4a6b71d37918a97594d866258f154017ca . |
21
bb8a8be49024
Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents:
20
diff
changeset
|
1855 .P |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1856 The check only prevented a pager to be placed between the printing |
104 | 1857 program (\c |
1858 .Pn mhl ) | |
1859 and the terminal. | |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1860 In nmh, this could have been ensured statically with the |
104 | 1861 .Sw -nomoreproc |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1862 at the command line, too. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
1863 In mmh, setting the profile entry |
104 | 1864 .Pe Pager |
1865 or the environment variable | |
1866 .Ev PAGER | |
1867 to | |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1868 .Pn cat |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1869 is sufficient. |
104 | 1870 |
1871 | |
21
bb8a8be49024
Wrote about Face support and vfork().
markus schnalke <meillo@marmaro.de>
parents:
20
diff
changeset
|
1872 |
12
7ca384d68edc
Wrote some text for removal of old code.
markus schnalke <meillo@marmaro.de>
parents:
0
diff
changeset
|
1873 |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
1874 .H2 "Attachments |
22
99409e4546d2
Wrote about the removal of tools.
markus schnalke <meillo@marmaro.de>
parents:
21
diff
changeset
|
1875 .P |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1876 The mind model of email attachments is unrelated to MIME. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1877 Although the MIME RFCs [RFC\|2045\(en2049] define the technical |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1878 requirements for having attachments, they do not mention the term. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1879 Instead of attachments, MIME talks about ``multi-part message bodies'' |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1880 [RFC\|2045], a more general concept. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1881 Multi-part messages are messages |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1882 ``in which one or more different |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1883 sets of data are combined in a single body'' |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1884 [RFC\|2046]. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1885 MIME keeps its descriptions generic; |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1886 it does not imply specific usage models. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1887 Today, one usage model is prevalent: attachments. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1888 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
|
1889 attached to it. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1890 In MIME terms, this is a multi-part message having a text part first |
110 | 1891 and parts of arbitrary type following. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1892 .P |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1893 MH's MIME support is a direct implementation of the RFCs. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1894 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
|
1895 in MH's implementation. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1896 .\" XXX rewrite ``no idea''. |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1897 As a result, |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1898 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
|
1899 But users do not need all the MIME features, |
109
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1900 they want convenient attachment handling. |
2b094b8fb422
Rework of existing text.
markus schnalke <meillo@marmaro.de>
parents:
108
diff
changeset
|
1901 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1902 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1903 .U3 "Composing MIME Messages |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1904 .P |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1905 In order to improve the situation on the message composing side, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1906 Jon Steinhart had added an attachment system to nmh in 2002 |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1907 .Ci 7480dbc14bc90f2d872d434205c0784704213252 . |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1908 In the file |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1909 .Fn docs/README-ATTACHMENTS , |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1910 he described his motivation to do so: |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1911 .QS |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1912 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
|
1913 handing [sic!], the interface to this functionality is pretty obtuse. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1914 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
|
1915 .Pn mhbuild |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1916 composition files! |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1917 .QE |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1918 .LP |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1919 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
|
1920 In the same document: |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1921 .QS |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1922 These changes simplify the task of managing attachments on draft files. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1923 They allow attachments to be added, listed, and deleted. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1924 MIME messages are automatically created when drafts with attachments |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1925 are sent. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1926 .QE |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1927 .LP |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1928 Unfortunately, the attachment system, like every new facilities in nmh, |
110 | 1929 was inactive by default. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1930 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1931 During my time in Argentina, I tried to improve the attachment system. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1932 But, after long discussions my patch died as a proposal on the |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1933 mailing list because of great opposition in the nmh community. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1934 .[ |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1935 nmh-workers attachment proposal |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1936 .] |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1937 In January 2012, I extended the patch and applied it to mmh |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1938 .Ci 8ff284ff9167eff8f5349481529332d59ed913b1 . |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1939 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
|
1940 Instead of command line switches, the |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1941 .Pe Attachment-Header |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1942 profile entry is used to specify |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1943 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
|
1944 It is pre-defined to |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1945 .Hd Attach . |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1946 .P |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1947 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
|
1948 .VS |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1949 To: bob |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1950 Subject: The file you wanted |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1951 Attach: /path/to/the/file-bob-wanted |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1952 -------- |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1953 Here it is. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1954 VE |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1955 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
|
1956 or by using the `attach' command at the WhatNow prompt, or |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1957 non-interactively with |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1958 .Pn anno : |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1959 .VS |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1960 anno -append -nodate -component Attach -text /path/to/attachment |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1961 VE |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1962 Drafts with attachment headers are converted to MIME automatically by |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1963 .Pn send . |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1964 The conversion to MIME is invisible to the user. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1965 The draft stored in the draft folder is always in source form with |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1966 attachment headers. |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
1967 If the MIMEification fails (e.g. because the file to attach |
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
1968 is not accessible) the original draft is not changed. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1969 .P |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1970 The attachment system handles the forwarding of messages, too. |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
1971 If the attachment header value starts with a plus character (`\fL+\fP'), |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1972 like in |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1973 .Cl "Attach: +bob 30 42" , |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
1974 the given messages in the specified folder will be attached. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1975 This allowed to simplify |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1976 .Pn forw |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1977 .Ci f41f04cf4ceca7355232cf7413e59afafccc9550 . |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1978 .P |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1979 Closely related to attachments is non-ASCII text content, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
1980 because it requires MIME as well. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1981 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
|
1982 to have the draft converted to MIME. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1983 This was necessary whenever the draft contained non-ASCII characters. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1984 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
|
1985 Therefore, the |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1986 .Pe automimeproc |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1987 profile entry could be specified to have the `mime' command invoked |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1988 automatically each time. |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
1989 Unfortunately, this approach conflicted with the attachment system |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1990 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
|
1991 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
|
1992 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
|
1993 WhatNow prompt and |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1994 .Pe automimeproc |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1995 must not be set in the profile. |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
1996 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
|
1997 not caught. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
1998 All in all, the solution was complex and irritating. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
1999 My patch from December 2010 |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2000 .[ |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2001 nmh-workers attachment proposal |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2002 .] |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2003 would have simplified the situation. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2004 .P |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2005 Mmh's current solution is even more elaborate. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2006 Any necessary MIMEification is done automatically. |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2007 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
|
2008 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
|
2009 attachment header or non-ASCII text is present. |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
2010 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
|
2011 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
|
2012 .\" XXX REF ? |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2013 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
|
2014 .P |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2015 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
|
2016 compositions directly, the full power of |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2017 .Pn mhbuild |
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2018 can still be accessed. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2019 Given no attachment headers are included, users can create |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2020 .Pn mhbuild |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2021 composition drafts like in nmh. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2022 Then, at the WhatNow prompt, they can invoke |
101
e8e6adb14beb
Wrote about attachments.
markus schnalke <meillo@marmaro.de>
parents:
100
diff
changeset
|
2023 .Cl "edit mhbuild |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2024 to convert the draft to MIME. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2025 Because the resulting draft neither contains non-ASCII characters |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2026 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
|
2027 .P |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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|
2028 The approach taken in mmh is tailored towards today's most common case: |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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parents:
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|
2029 a text part, possibly with attachments. |
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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|
2030 This case was simplified. |
101
e8e6adb14beb
Wrote about attachments.
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100
diff
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|
2031 |
112
4e6a9ae1b53c
Added a bit of text on modern defaults; plus added code refs.
markus schnalke <meillo@marmaro.de>
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110
diff
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|
2032 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
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101
diff
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|
2033 .U3 "MIME Type Guessing |
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|
2034 .P |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
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diff
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|
2035 From the programmer's point of view, the use of |
102
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101
diff
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|
2036 .Pn mhbuild |
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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|
2037 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
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|
2038 The user provides the appropriate MIME types for files to include. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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diff
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|
2039 The new attachment system needs to find out the correct MIME type itself. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
2040 This is a difficult task. |
102
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diff
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|
2041 Determining the correct MIME type of content is partly mechanical, |
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101
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|
2042 partly intelligent work. |
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More text about attachments mainly, plus some rearrangements.
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|
2043 Forcing the user to find out the correct MIME type, |
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|
2044 forces him to do partly mechanical work. |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
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178
diff
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|
2045 Letting the computer do the work can lead to bad choices for difficult |
102
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|
2046 content. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
2047 For mmh, the latter option was chosen to spare the user the work |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
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|
2048 .Ci 3baec236a39c5c89a9bda8dbd988d643a21decc6 . |
102
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|
2049 .P |
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More text about attachments mainly, plus some rearrangements.
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diff
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|
2050 Determining the MIME type by the suffix of the file name is a dumb |
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|
2051 approach, yet it is simple to implement and provides good results |
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|
2052 for the common cases. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
2053 If no MIME type can be determined, text content is sent as `text/plain', |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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|
2054 anything else under the generic fall-back type `application/octet-stream'. |
102
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More text about attachments mainly, plus some rearrangements.
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|
2055 Mmh implements this approach in the |
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More text about attachments mainly, plus some rearrangements.
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|
2056 .Pn print-mimetype |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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212
diff
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|
2057 script |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
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|
2058 .Ci 4b5944268ea0da7bb30598a27857304758ea9b44 . |
102
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markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
2059 .P |
112
4e6a9ae1b53c
Added a bit of text on modern defaults; plus added code refs.
markus schnalke <meillo@marmaro.de>
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110
diff
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|
2060 A far better, though less portable, approach is the use of |
102
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markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
2061 .Pn file . |
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diff
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|
2062 This standard tool tries to determine the type of files. |
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|
2063 Unfortunately, its capabilities and accuracy varies from system to system. |
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101
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2064 Additionally, its output was only intended for human beings, |
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|
2065 but not to be used by programs. |
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101
diff
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|
2066 Nevertheless, modern versions of GNU |
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|
2067 .Pn file , |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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212
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|
2068 which are prevalent on the popular GNU/Linux systems, |
159
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Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
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|
2069 provide MIME type output in machine-readable form. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
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parents:
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|
2070 Although this solution is system-dependent, |
102
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101
diff
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|
2071 it solves the difficult problem well. |
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|
2072 On systems where GNU |
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101
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|
2073 .Pn file , |
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101
diff
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|
2074 version 5.04 or higher, is available it should be used. |
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101
diff
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|
2075 One needs to specify the following profile entry to do so: |
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101
diff
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|
2076 .VS |
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More text about attachments mainly, plus some rearrangements.
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101
diff
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|
2077 Mime-Type-Query: file -b --mime |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2078 VE |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2079 .LP |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
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101
diff
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|
2080 Other versions of |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
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parents:
101
diff
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|
2081 .Pn file |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
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|
2082 might possibly be usable with wrapper scripts that reformat the output. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
2083 The diversity among |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
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parents:
101
diff
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|
2084 .Pn file |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
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parents:
101
diff
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|
2085 implementations is great; one needs to check the local variant. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
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parents:
101
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|
2086 .P |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
2087 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
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|
2088 for a specific file. |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
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|
2089 To do so, either the user would need to know in advance for which file |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
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|
2090 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
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|
2091 I consider both cases impractical. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
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101
diff
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|
2092 The existing solution should be sufficient. |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
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101
diff
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|
2093 If not, the user may always fall back to |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
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parents:
101
diff
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|
2094 .Pn mhbuild |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
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|
2095 composition drafts and bypass the attachment system. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2096 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2097 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
2098 .U3 "Storing Attachments |
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More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
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|
2099 .P |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
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168
diff
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|
2100 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
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|
2101 .Pn mhstore . |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2102 The program has two operation modes, |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
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|
2103 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2104 and |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2105 .Sw -noauto . |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2106 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
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|
2107 MIME part's meta information, if available. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
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107
diff
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|
2108 This naming information is usually available for modern attachments. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
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107
diff
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|
2109 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
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|
2110 .Sw -noauto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2111 would have been specified. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2112 In the |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2113 .Sw -noauto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2114 mode, the parts are processed according to rules, defined by |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
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|
2115 .Pe mhstore-store-* |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2116 profile entries. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
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|
2117 These rules define generic filename templates for storing |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2118 or commands to post-process the contents in arbitrary ways. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
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107
diff
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|
2119 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
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|
2120 filename, built from message number, MIME part number, and MIME type. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
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|
2121 .P |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2122 The |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2123 .Sw -noauto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2124 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
|
2125 in contrast to the |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2126 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2127 mode. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2128 In mmh, |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2129 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2130 is not dangerous anymore. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2131 Two changes were necessary: |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2132 .LI 1 |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
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|
2133 Any directory path is removed from the proposed filename. |
dd5620bf8659
Wrote about storing attachments.
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107
diff
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|
2134 Thus, the files are always stored in the expected directory. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
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107
diff
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|
2135 .Ci 41b6eadbcecf63c9a66aa5e582011987494abefb |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2136 .LI 2 |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2137 Tar files are not extracted automatically any more. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
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107
diff
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|
2138 Thus, the rest of the file system will not be touched. |
dd5620bf8659
Wrote about storing attachments.
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107
diff
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|
2139 .Ci 94c80042eae3383c812d9552089953f9846b1bb6 |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
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|
2140 .P |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
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|
2141 In mmh, the result of |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
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|
2142 .Cl "mhstore -auto |
110 | 2143 can be foreseen from the output of |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
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|
2144 .Cl "mhlist -verbose" . |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2145 Although the |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2146 .Sw -noauto |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2147 mode is considered to be more powerful, it is less convenient and |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2148 .Sw -auto |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2149 is safe now. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2150 Additionally, storing attachments under their original name |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2151 is intuitive. |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2152 Hence, |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2153 .Sw -auto |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2154 serves better as the default option |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2155 .Ci 3410b680416c49a7617491af38bc1929855a331d . |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2156 .P |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2157 Files are stored into the directory given by the |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2158 .Pe Nmh-Storage |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2159 profile entry, if set, or |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2160 into the current working directory, otherwise. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2161 Storing to different directories is only possible with |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2162 .Pe mhstore-store-* |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2163 profile entries. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2164 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2165 Still existing files get overwritten silently in both modes. |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2166 This can be considered a bug. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2167 Yet, each other behavior has its draw-backs, too. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2168 Refusing to replace files requires adding a |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2169 .Sw -force |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2170 switch. |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2171 Users will likely need to invoke |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2172 .Pn mhstore |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2173 a second time with |
159
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2174 .Sw -force . |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2175 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
|
2176 This requires interaction, which I like to avoid if possible. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2177 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
|
2178 For now, the behavior remains as it is. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2179 .P |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2180 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
|
2181 .Pn mhstore 's |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2182 .Sw -auto |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2183 mode. |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2184 Instead of storing message/rfc822 parts as files to disk, |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2185 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
|
2186 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
|
2187 automatically reassembled beforehand. |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2188 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
|
2189 anymore. |
8b411125645d
Corrections and improvements by Kate, Phil, Matou, Michi, Lydi.
markus schnalke <meillo@marmaro.de>
parents:
157
diff
changeset
|
2190 Instead, information on how to retrieve them is output. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2191 Not supporting this rare case saved nearly one thousand lines of code |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2192 .Ci 55e1d8c654ee0f7c45b9361ce34617983b454c32 . |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2193 .\" XXX mention somewhere else too: (The profile entry `nmh-access-ftp' |
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2194 .\" and sbr/ruserpass.c for reading ~/.netrc are gone now.) |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2195 The MIME type `application/octet-stream; type=tar' is not special anymore. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2196 The automatically extracting of such MIME parts had been the |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2197 dangerous part of the |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2198 .Sw -auto |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2199 mode |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2200 .Ci 94c80042eae3383c812d9552089953f9846b1bb6 . |
108
dd5620bf8659
Wrote about storing attachments.
markus schnalke <meillo@marmaro.de>
parents:
107
diff
changeset
|
2201 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2202 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2203 |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2204 .U3 "Showing MIME Messages |
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2205 .P |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2206 The program |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2207 .Pn mhshow |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2208 was written to display MIME messages. |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2209 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
|
2210 Nmh's |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2211 .Pn mhshow |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2212 handles each MIME part independently, presenting them separately |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2213 to the user. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2214 This does not match today's understanding of email attachments, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2215 where displaying a message is seen to be a single, integrated operation. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2216 Today, email messages are expected to consist of a main text part |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2217 plus possibly attachments. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2218 They are no more seen to be arbitrary MIME hierarchies with |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2219 information on how to display the individual parts. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2220 I adjusted |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2221 .Pn mhshow 's |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2222 behavior to the modern view on the topic. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2223 .P |
224
b0e83cfde2bf
Further minor improvements.
markus schnalke <meillo@marmaro.de>
parents:
223
diff
changeset
|
2224 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
|
2225 .Pn show |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2226 program, because it was not capable to display MIME messages |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2227 and is no longer part of mmh. |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
2228 .\" XXX ref to other section |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2229 Although |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2230 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2231 was renamed to |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2232 .Pn show |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2233 in mmh, this section uses the name |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2234 .Pn mhshow , |
224
b0e83cfde2bf
Further minor improvements.
markus schnalke <meillo@marmaro.de>
parents:
223
diff
changeset
|
2235 in order to avoid confusion. |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2236 .P |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2237 In mmh, the basic idea is that |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2238 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2239 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
|
2240 Therefore, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2241 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2242 invokes a pager session for all its output, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2243 whenever it prints to a terminal |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2244 .Ci a4197ea6ffc5c1550e8b52d5a654bcaaaee04a4e . |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2245 In consequence, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2246 .Pn mhl |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2247 does no more invoke a pager |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2248 .Ci 0e46503be3c855bddaeae3843e1b659279c35d70 . |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2249 With |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2250 .Pn mhshow |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2251 replacing the original |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2252 .Pn show , |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2253 the output of |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2254 .Pn mhl |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2255 no longer goes to the terminal directly, but through |
114
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 Hence, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2258 .Pn mhl |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2259 does not need to invoke a pager. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2260 The one and only job of |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2261 .Pn mhl |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2262 is to format messages or parts of them. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2263 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
|
2264 .Pn mhshow . |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2265 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2266 In the intended setup, only text content is be displayed, |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2267 in a single pager session. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2268 Non-text content needs to be converted to text by appropriate |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2269 .Pe mhshow-show-* |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2270 profile entries before, if this is possible and wanted. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2271 A common example for this are PDF files. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2272 .ig \"XXX |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2273 .Pe mhshow-show-* |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2274 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
|
2275 to display them in the terminal. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2276 .. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2277 In mmh, MIME parts are always displayed serially. |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2278 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
|
2279 is ignored. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2280 It is simply treated as `multipart/mixed' |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2281 .Ci d0581ba306a7299113a346f9b4c46ce97bc4cef6 . |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2282 This was already possible to requested with the, now removed, |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2283 .Sw -serialonly |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2284 switch of |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2285 .Pn mhshow . |
179
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
2286 As MIME parts are always processed exclusively, i.e. serially, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2287 the `\fL%e\fP' escape in |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2288 .Pe mhshow-show-* |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2289 profile entries became useless and was thus removed |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2290 .Ci a20d405db09b7ccca74d3e8c57550883da49e1ae . |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2291 .P |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2292 Other kinds of attachments are ignored. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2293 With |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2294 .Pe mhshow-show-* |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2295 profile entries for them, they can be displayed serially along |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2296 the message. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2297 For parallel display, the attachments need to be stored to disk first. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2298 .P |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2299 To display text content in foreign charsets, they need to be converted |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2300 to the native charset. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2301 Therefore, |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2302 .Pe mhshow-charset-* |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2303 profile entries were needed. |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
2304 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
|
2305 text through the |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2306 .Pn iconv |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2307 command, if necessary |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2308 .Ci 2433122c20baccb10b70b49c04c6b0497b5b3b60 . |
114
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2309 Custom |
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.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2311 rules for textual content might need a |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2312 .Cl "iconv -f %c %f | |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2313 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
|
2314 .P |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
2315 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
|
2316 has improved, it is not consistent enough. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2317 Further work needs to be done and |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2318 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
|
2319 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
|
2320 correctly without the need to configure anything. |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2321 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2322 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2323 .ig |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2324 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2325 .P |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2326 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
|
2327 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
|
2328 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
|
2329 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
|
2330 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
|
2331 it! |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2332 (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
|
2333 ~/.netrc are gone now.) |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2334 .Ci 55e1d8c654ee0f7c45b9361ce34617983b454c32 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2335 |
92cbd3fa1c40
Wrote text about displaying mime messages.
markus schnalke <meillo@marmaro.de>
parents:
112
diff
changeset
|
2336 .. |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2337 |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
2338 |
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
2339 |
166
f102dcc06bb9
s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents:
165
diff
changeset
|
2340 .H2 "Signing and Encrypting |
22
99409e4546d2
Wrote about the removal of tools.
markus schnalke <meillo@marmaro.de>
parents:
21
diff
changeset
|
2341 .P |
166
f102dcc06bb9
s/digital cryptography/signing and encryption/
markus schnalke <meillo@marmaro.de>
parents:
165
diff
changeset
|
2342 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
|
2343 This functionality needed to be added through third-party software. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2344 In mmh, the functionality is included because it |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2345 is a part of modern email and is likely wanted by users of mmh. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2346 A fresh mmh installation supports signing and encrypting |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2347 out-of-the-box. |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2348 Therefore, Neil Rickert's |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2349 .Pn mhsign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2350 and |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2351 .Pn mhpgp |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2352 scripts |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2353 .[ |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2354 neil rickert mhsign mhpgp |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2355 .] |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2356 were included |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2357 .Ci f45cdc98117a84f071759462c7ae212f4bc5ab2e |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2358 .Ci 58cf09aa36e9f7f352a127158bbf1c5678bc6ed8 . |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2359 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
|
2360 similar of style to the existing tools. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2361 Additionally, no licensing difficulties appeared |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2362 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
|
2363 .P |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2364 .Pn mhsign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2365 handles the signing and encrypting part. |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2366 It comprises about 250 lines of shell code and interfaces between |
223
1fa5a74bf138
Reworked References structure: Collect them all in one Chapter.
markus schnalke <meillo@marmaro.de>
parents:
220
diff
changeset
|
2367 .Pn gnupg |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2368 and the MH system. |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2369 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
|
2370 .Pn send |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2371 invokes |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2372 .Pn mhsign |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2373 automatically |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2374 .Ci c7b5e1df086bcc37ff40163ee67571f076cf6683 . |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2375 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
|
2376 If a draft contains the |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2377 .Hd Sign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2378 header field, |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2379 .Pn send |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2380 will initiate the signing. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2381 The signing key is either chosen automatically or it is specified by the |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2382 .Pe Pgpkey |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2383 profile entry. |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2384 .Pn send |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2385 always create signatures using the PGP/MIME standard [RFC\|4880], |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2386 but by invoking |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2387 .Pn mhsign |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2388 manually, 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
|
2389 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
|
2390 .Hd Enc |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2391 header field. |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2392 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
|
2393 in a file called |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2394 .Fn pgpkeys , |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2395 which contains exceptions and overrides. |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2396 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
|
2397 .Pn mhsign |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2398 will refuse to encrypt it. |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2399 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
|
2400 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
|
2401 approach. |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2402 .P |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2403 .Pn mhpgp |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2404 is the companion to |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2405 .Pn mhsign . |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2406 It verifies signatures and decrypts messages. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2407 Encrypted messages can be either temporarily decrypted and displayed |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2408 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
|
2409 Currently, |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2410 .Pn mhpgp |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2411 needs to be invoked manually. |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2412 The integration into |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2413 .Pn show |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2414 and |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2415 .Pn mhstore |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2416 to verify signatures and decrypt messages as needed |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2417 is planned but not yet realized. |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2418 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2419 Both scripts were written for nmh. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2420 Hence they needed to be adjust |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2421 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
|
2422 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
|
2423 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
|
2424 .P |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2425 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
|
2426 most recent features in mmh. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2427 It has not had the time to mature. |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2428 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
|
2429 direct the further development of the facility. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2430 Already 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
|
2431 .Sw -[no]sign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2432 and |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2433 .Sw -[no]enc |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2434 switches to |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2435 .Pn send , |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2436 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
|
2437 A profile entry: |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2438 .VS |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2439 send: -sign |
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2440 VE |
177
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2441 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
|
2442 With the present approach, a |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2443 .Hd Send |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2444 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
|
2445 to achieve the same result. |
3d7db5c7965d
Finished the section on signing and encryption.
markus schnalke <meillo@marmaro.de>
parents:
173
diff
changeset
|
2446 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
|
2447 template files clean. |
157
0cce17978f0a
Wrote about signing and encrypting. Not finished yet.
markus schnalke <meillo@marmaro.de>
parents:
155
diff
changeset
|
2448 |
58
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
2449 |
814c33b96d89
Restructured the content in ch03.
markus schnalke <meillo@marmaro.de>
parents:
51
diff
changeset
|
2450 |
102
a782488c85f5
More text about attachments mainly, plus some rearrangements.
markus schnalke <meillo@marmaro.de>
parents:
101
diff
changeset
|
2451 |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2452 .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
|
2453 .P |
14
55ec590cfa07
Wrote about the draft folder.
markus schnalke <meillo@marmaro.de>
parents:
12
diff
changeset
|
2454 |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2455 .U3 "Draft Folder |
154
63e885fb48ba
Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents:
145
diff
changeset
|
2456 .Id draft-folder |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2457 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2458 In the beginning, MH had the concept of a draft message. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2459 This was a file named |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2460 .Fn draft |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2461 in the MH directory, which was treated special. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2462 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
|
2463 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
|
2464 the user had to decide among: |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2465 .LI 1 |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2466 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
|
2467 .LI 2 |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2468 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
|
2469 .LI 3 |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2470 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
|
2471 .LP |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2472 Working on multiple drafts was only possible in alternation. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2473 For that, 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
|
2474 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
|
2475 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
|
2476 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
|
2477 help anything. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2478 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2479 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
|
2480 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
|
2481 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
|
2482 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
|
2483 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
|
2484 out-of-the-box. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2485 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
|
2486 .Mp mh-draft (5) |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2487 to better document the feature. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2488 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2489 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
|
2490 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
|
2491 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
|
2492 complex cases. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2493 The concept of the draft message is too limited for the problem |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2494 it tries to solve. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2495 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
|
2496 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
|
2497 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
|
2498 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
|
2499 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
|
2500 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
|
2501 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
|
2502 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2503 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
|
2504 default name. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2505 I chose the name |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2506 .Fn +drafts , |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2507 for obvious reasons. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2508 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
|
2509 .Sw -draftfolder |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2510 and |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2511 .Sw -draftmessage |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2512 could be removed. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2513 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
|
2514 new concept. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2515 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
|
2516 approaches. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2517 By fully switching to the draft folder, the tools could be |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2518 simplified by dropping the awkward draft message handling code. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2519 .Sw -draft |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2520 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
|
2521 special. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2522 It became indistinguishable to operating on any other message. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2523 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860 |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2524 .P |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2525 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
|
2526 .Ci 2d48b455c303a807041c35e4248955f8bec59eeb . |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2527 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
|
2528 Refiling drafts is without difference to refiling other messages. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2529 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
|
2530 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
|
2531 .Pn comp |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2532 still has |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2533 .Sw -[no]use |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2534 for switching between two modes: |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2535 .LI 1 |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2536 Modifying an existing draft, with |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2537 .Sw -use . |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2538 .LI 2 |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2539 Composing a new draft, possibly taking some existing message as template, |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2540 with |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2541 .Sw -nouse , |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2542 the default. |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2543 .LP |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2544 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
|
2545 .Pn comp |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2546 is deterministic. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2547 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2548 .Pn send |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2549 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
|
2550 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
|
2551 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
|
2552 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
|
2553 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
|
2554 .Pn send |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2555 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
|
2556 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2557 Dropping the draft message concept in favor for the draft folder concept, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2558 replaced special cases with regular cases. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2559 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
|
2560 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
|
2561 but applies them. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2562 .Cl "scan +drafts" , |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2563 for instance, is a truly natural request. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2564 .P |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
2565 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
|
2566 The original improvement of mmh is dropping the old draft message approach |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2567 and thus simplifying the tools, the documentation, |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2568 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
|
2569 Although my part in the draft handling improvement was small, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2570 it was important. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2571 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2572 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2573 .U3 "Trash Folder |
154
63e885fb48ba
Converted some internal references to the new macros.
markus schnalke <meillo@marmaro.de>
parents:
145
diff
changeset
|
2574 .Id trash-folder |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2575 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2576 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
|
2577 Historically, a message was ``deleted'' by prepending a specific |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
2578 \fIbackup prefix\fP, usually the comma character, |
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
2579 to the file name. |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2580 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
|
2581 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
|
2582 Although files remained in the file system, |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2583 the messages were no longer visible in MH. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2584 To truly delete them, a maintenance job was needed. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2585 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
|
2586 For instance: |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2587 .VS |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2588 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
|
2589 VE |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2590 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
|
2591 within the grace time interval by stripping the |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2592 backup prefix from the file name \(en usually but not always. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2593 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
|
2594 message |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2595 .Fn 6 , |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2596 became file |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2597 .Fn ,6 . |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2598 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
|
2599 the number one above the highest existing message number. |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2600 In this case the message would be named |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2601 .Fn 6 , |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2602 reusing the number. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2603 If this new message would be removed as well, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2604 then the backup of the former message becomes overwritten. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2605 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
|
2606 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
|
2607 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
|
2608 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
|
2609 ``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
|
2610 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
|
2611 same folder is removed before.'' the statement becomes complex. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2612 A user will hardly be able to keep track of all removals to know |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2613 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
|
2614 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
|
2615 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2616 Furthermore, the backup files were scattered within the whole mail storage. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2617 This complicated managing them. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2618 It was 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
|
2619 .Pn find , |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2620 but everything is more convenient |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2621 if the deleted messages are collected in one place. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2622 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2623 The profile entry |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2624 .Pe rmmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2625 (previously named |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2626 .Pe Delete-Prog ) |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2627 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
|
2628 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
|
2629 the specified messages. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2630 This had overridden the default action, described above. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2631 Refiling the to-be-removed files to a trash folder was the usual example. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2632 Nmh's man page |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2633 .Mp rmm (1) |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2634 proposes to set the |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2635 .Pe rmmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2636 to |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2637 .Cl "refile +d |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2638 to move messages to the trash folder |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2639 .Fn +d |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2640 instead of renaming them with the backup prefix. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2641 The man page additionally proposes the expunge command |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2642 .Cl "rm `mhpath +d all` |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2643 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
|
2644 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2645 Removing messages in such a way has advantages: |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2646 .LI 1 |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2647 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
|
2648 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
|
2649 Existing and removed messages are thus separated more strictly. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2650 .LI 2 |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2651 No backup files are silently overwritten. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2652 .LI 3 |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2653 Most important, however, removed messages are kept in the MH domain. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2654 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
|
2655 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
|
2656 .Pn refile |
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
markus schnalke <meillo@marmaro.de>
parents:
168
diff
changeset
|
2657 can restore deleted messages. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2658 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
|
2659 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
|
2660 .P |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2661 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
|
2662 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
|
2663 Hence, |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2664 .Pn rmm |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2665 calls |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2666 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2667 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
|
2668 .Fn +trash |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2669 by default. |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2670 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
|
2671 .Cl "rmm -unlink +trash a" , |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2672 where the |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2673 .Sw -unlink |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2674 switch causes the files to be unlinked. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2675 .Ci 8edc5aaf86f9f77124664f6801bc6c6cdf258173 |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2676 .Ci ca0b3e830b86700d9e5e31b1784de2bdcaf58fc5 |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2677 .P |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2678 Dropping the legacy approach and converting to the new approach |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2679 completely, simplified the code base. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2680 The relationship between |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2681 .Pn rmm |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2682 and |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2683 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2684 was inverted. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2685 In mmh, |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2686 .Pn rmm |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2687 invokes |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2688 .Pn refile . |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2689 That used to be the other way round. |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2690 Yet, the relationship is simpler now. |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2691 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
|
2692 .Mp refile (1), |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
2693 can no longer occur: |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2694 .QS |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2695 Since |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2696 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2697 uses your |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2698 .Pe rmmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2699 to delete the message, the |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2700 .Pe rmmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2701 must NOT call |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2702 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2703 without specifying |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2704 .Sw -normmproc |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2705 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
|
2706 .QE |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2707 .LP |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2708 .Pn rmm |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2709 either unlinks a message with |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2710 .Fu unlink() |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2711 or invokes |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2712 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2713 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
|
2714 .Pn refile |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2715 does not invoke any tools. |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2716 .P |
136 | 2717 By generalizing the message removal in the way that it became covered |
2718 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
|
2719 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2720 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2721 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2722 |
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2723 |
133
02660c14f6a8
Further re-ordering of the sections.
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parents:
131
diff
changeset
|
2724 .H2 "Modern Defaults |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2725 .P |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2726 Nmh has a bunch of convenience-improving features inactive by default, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
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212
diff
changeset
|
2727 although one can expect every new user to want them active. |
133
02660c14f6a8
Further re-ordering of the sections.
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131
diff
changeset
|
2728 The reason they are inactive by default is the wish to stay compatible |
02660c14f6a8
Further re-ordering of the sections.
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131
diff
changeset
|
2729 with old versions. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2730 But what are old versions? |
136 | 2731 Still, the highly useful draft folder facility has not been activated |
2732 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
|
2733 .[ |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2734 rose romine real work |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
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131
diff
changeset
|
2735 .] |
136 | 2736 The community seems not to care. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2737 .P |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2738 In nmh, new users are required to first build up |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2739 a profile before they can access the modern features. |
136 | 2740 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
|
2741 for modern emailing. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2742 The point is not the customization of the setup, |
136 | 2743 but the need to activate generally useful facilities. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2744 Yet, the real problem lies less in enabling the features, |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2745 as this is 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
|
2746 The real problem is that new users need deep insight into the project |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2747 to discover the available but inactive features. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2748 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
|
2749 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
|
2750 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
|
2751 documentation. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2752 If I would have installed nmh from source back then, I could agree. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2753 Yet, I had used a pre-packaged version and had expected that it would |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2754 just work. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2755 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
|
2756 and I am a software developer, |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2757 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
|
2758 How can we expect users to be even more advanced than me, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2759 just to enable them to use MH in a convenient and modern way? |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2760 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
|
2761 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
|
2762 before they truly used the system, |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2763 although they had been motivated in the beginning. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2764 New users 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
|
2765 we developers should spare them further inconveniences. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2766 .P |
136 | 2767 Maintaining compatibility for its own sake is bad, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2768 because the code base will collect more and more compatibility code. |
200 | 2769 Sticking to the compatibility code means remaining limited; |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2770 whereas adjusting to the changes renders the compatibility unnecessary. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2771 Keeping unused alternatives in the code for longer than a short |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2772 grace time is a bad choice as they likely |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2773 gather bugs by not being constantly tested. |
136 | 2774 Also, the increased code size and the greater number of conditions |
2775 increase the maintenance costs. | |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2776 If any MH implementation would be the back-end of widespread |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2777 email clients with large user bases, compatibility would be more |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2778 important. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2779 Yet, it appears as if this is not the case. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2780 Hence, compatibility is hardly important for technical reasons. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2781 Its importance originates from personal reasons rather. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2782 Nmh's user base is small and old. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2783 Changing the interfaces causes inconvenience to long-term users of MH. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2784 It forces them to change their many years old MH configurations. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2785 I do understand this aspect, but by sticking to the old users, |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2786 new users are kept from entering the world of MH. |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2787 But the future lies in new users. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2788 In consequence, mmh invites new users by providing a convenient |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
2789 and modern setup, readily usable out-of-the-box. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2790 .P |
136 | 2791 In mmh, all modern features are active by default and many previous |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2792 approaches are removed or only accessible in a manual way. |
136 | 2793 New default features include: |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2794 .BU |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2795 The attachment system (\c |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2796 .Hd Attach ) |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2797 .Ci 8ff284ff9167eff8f5349481529332d59ed913b1 . |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2798 .BU |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2799 The draft folder facility (\c |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2800 .Fn +drafts ) |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2801 .Ci 337338b404931f06f0db2119c9e145e8ca5a9860 . |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2802 .BU |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2803 The unseen sequence (`u') |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2804 .Ci c2360569e1d8d3678e294eb7c1354cb8bf7501c1 |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2805 and the sequence negation prefix (`!') |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2806 .Ci db74c2bd004b2dc9bf8086a6d8bf773ac051f3cc . |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2807 .BU |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2808 Quoting the original message in the reply |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2809 .Ci 67411b1f95d6ec987b4c732459e1ba8a8ac192c6 . |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2810 .BU |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2811 Forwarding messages using MIME |
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2812 .Ci 6e271608b7b9c23771523f88d23a4d3593010cf1 . |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
2813 .LP |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2814 An mmh setup with a profile that defines only the path to the |
136 | 2815 mail storage, is already convenient to use. |
217
f3f65376bef9
A big bunch of corrections in 2.1 and 2.2.
markus schnalke <meillo@marmaro.de>
parents:
212
diff
changeset
|
2816 Again, Paul Vixie's supports the direction I took: |
136 | 2817 ``the `main branch' should just be modern''. |
2818 .[ | |
2819 paul vixie edginess nmh-workers | |
2820 .] | |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2821 |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2822 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2823 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2824 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2825 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
2826 .\" -------------------------------------------------------------- |
131
7c741bc8f719
Reorganized: Converted 4-parted discussion into 3-parted discussion.
markus schnalke <meillo@marmaro.de>
parents:
130
diff
changeset
|
2827 .H1 "Styling |
16
81f703140554
Wrote about the trash folder.
markus schnalke <meillo@marmaro.de>
parents:
14
diff
changeset
|
2828 .P |
118
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2829 Kernighan and Pike have emphasized the importance of style in the |
219
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2830 preface of \fPThe Practice of Programming\fP: |
118
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2831 .[ [ |
48e28eaee6f9
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2832 kernighan pike practice of programming |
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2833 .], p. x] |
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2834 .QS |
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Wrote intro to Modernizing and new text about Code Style.
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2835 Chapter 1 discusses programming style. |
219
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2836 Good style is so important to good programming that we have chosen |
118
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2837 to cover it first. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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2838 .QE |
168
277eeb5ba223
Applied suggestions by Lydi.
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2839 This section covers changes in mmh that were guided by the desire |
118
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Wrote intro to Modernizing and new text about Code Style.
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2840 to improve on style. |
219
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2841 Many of them follow the advice given in the quoted book. |
118
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2842 |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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2843 |
127
4a9a97d9d6b5
Exchanged the section titles `Style' and `Code Style'.
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2844 |
4a9a97d9d6b5
Exchanged the section titles `Style' and `Code Style'.
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2845 |
4a9a97d9d6b5
Exchanged the section titles `Style' and `Code Style'.
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2846 .H2 "Code Style |
154
63e885fb48ba
Converted some internal references to the new macros.
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2847 .Id code-style |
118
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Wrote intro to Modernizing and new text about Code Style.
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2848 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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2849 .U3 "Indentation Style |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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2850 .P |
219
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Further improvements of the discussion chapter.
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2851 Indentation styles are the holy cow of programming. |
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2852 Kernighan and Pike write: |
118
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Wrote intro to Modernizing and new text about Code Style.
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2853 .[ [ |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
diff
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2854 kernighan pike practice of programming |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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|
2855 .], p. 10] |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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2856 .QS |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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2857 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
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2858 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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2859 application. |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
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120
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|
2860 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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2861 time arguing. |
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Wrote intro to Modernizing and new text about Code Style.
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116
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2862 .QE |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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2863 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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116
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2864 I agree that the constant application is most important, |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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2865 but I believe that some styles have advantages over others. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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2866 For instance the indentation with tab characters only. |
219
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2867 The number of tabs corresponds to the nesting level \(en |
118
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2868 one tab, one level. |
219
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2869 Tab characters provide flexible visual appearance because developers |
8c537982d718
Further improvements of the discussion chapter.
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2870 can adjust their width as prefered. |
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Further improvements of the discussion chapter.
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217
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|
2871 There is no more need to check for the correct mixture of |
8c537982d718
Further improvements of the discussion chapter.
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217
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|
2872 tabs and spaces. |
8c537982d718
Further improvements of the discussion chapter.
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217
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|
2873 Two simple rules ensure the integrity and flexibility of the visual |
8c537982d718
Further improvements of the discussion chapter.
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217
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|
2874 appearance: |
8c537982d718
Further improvements of the discussion chapter.
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217
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|
2875 .LI 1 |
8c537982d718
Further improvements of the discussion chapter.
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217
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|
2876 Leading whitespace must consist of tabs only. |
8c537982d718
Further improvements of the discussion chapter.
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217
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|
2877 .LI 2 |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
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|
2878 All other whitespace should be spaces. |
8c537982d718
Further improvements of the discussion chapter.
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217
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|
2879 .LP |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
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|
2880 Although reformatting existing code should be avoided, I did it. |
200 | 2881 I did not waste time arguing; I just reformatted the code. |
118
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Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2882 .Ci a485ed478abbd599d8c9aab48934e7a26733ecb1 |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2883 |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2884 .U3 "Comments |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2885 .P |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2886 Kernighan and Pike demand: ``Don't belabor the obvious''. |
118
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Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2887 .[ [ |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2888 kernighan pike practice of programming |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2889 .], p. 23] |
219
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Further improvements of the discussion chapter.
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217
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2890 Following the advice, I removed unnecessary comments. |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
2891 For instance, I removed all comments in the following code excerpt |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
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|
2892 .Ci 426543622b377fc5d091455cba685e114b6df674 : |
118
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Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2893 .VS |
120
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
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|
2894 context_replace(curfolder, folder); /* update current folder */ |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
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|
2895 seq_setcur(mp, mp->lowsel); /* update current message */ |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
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|
2896 seq_save(mp); /* synchronize message sequences */ |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
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|
2897 folder_free(mp); /* free folder/message structure */ |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
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|
2898 context_save(); /* save the context file */ |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
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|
2899 |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2900 [...] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2901 |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
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|
2902 int c; /* current character */ |
e49780100ffb
Wrote about the rework of anno(1).
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118
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|
2903 char *cp; /* miscellaneous character pointer */ |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
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|
2904 |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2905 [...] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2906 |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2907 /* NUL-terminate the field */ |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
2908 *cp = '\0'; |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2909 VE |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2910 .P |
219
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Further improvements of the discussion chapter.
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parents:
217
diff
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|
2911 The information in each of the comments was present in the code |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2912 statements already, except for the NUL-termination, which became |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
2913 obvious from the context. |
136 | 2914 |
118
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Wrote intro to Modernizing and new text about Code Style.
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parents:
116
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|
2915 |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
diff
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|
2916 .U3 "Names |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
diff
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|
2917 .P |
219
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Further improvements of the discussion chapter.
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217
diff
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|
2918 Regarding this topic, Kernighan and Pike suggest: |
118
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Wrote intro to Modernizing and new text about Code Style.
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parents:
116
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|
2919 ``Use active names for functions''. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
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|
2920 .[ [ |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
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|
2921 kernighan pike practice of programming |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2922 .], p. 4] |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
diff
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|
2923 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
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|
2924 .Fu check_charset() |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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parents:
116
diff
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|
2925 to |
219
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
2926 .Fu is_native_charset() |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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2927 .Ci 8d77b48284c58c135a6b2787e721597346ab056d . |
8c537982d718
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217
diff
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|
2928 The same change additionally fixed a violation of ``Be accurate'', |
181
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
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diff
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|
2929 .[ [ |
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
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180
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|
2930 kernighan pike practice of programming |
eb6eeb10afd5
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180
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|
2931 .], p. 4] |
219
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217
diff
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|
2932 as the code did not match the expectation the function suggested. |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
2933 It did not compare charset names but prefixes of them only. |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
2934 In case the native charset was `ISO-8859-1', then |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
2935 .VS |
8c537982d718
Further improvements of the discussion chapter.
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diff
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|
2936 check_charset("ISO-8859-11", strlen("ISO-8859-11")) |
8c537982d718
Further improvements of the discussion chapter.
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217
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|
2937 VE |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
2938 had returned true although the upper halves of the code pages |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
2939 are different. |
118
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Wrote intro to Modernizing and new text about Code Style.
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116
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|
2940 .P |
48e28eaee6f9
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116
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|
2941 More important than using active names is using descriptive names. |
145
3361e53dfcd6
Added comments and a source quote.
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parents:
139
diff
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|
2942 .VS |
3361e53dfcd6
Added comments and a source quote.
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|
2943 m_unknown(in); /* the MAGIC invocation... */ |
3361e53dfcd6
Added comments and a source quote.
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139
diff
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|
2944 VE |
3361e53dfcd6
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139
diff
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|
2945 Renaming the obscure |
118
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116
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changeset
|
2946 .Fu m_unknown() |
219
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Further improvements of the discussion chapter.
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|
2947 function was a delightful event, although it made the code less funny |
8c537982d718
Further improvements of the discussion chapter.
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217
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|
2948 .Ci 611d68d19204d7cbf5bd585391249cb5bafca846 . |
118
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Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2949 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2950 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
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|
2951 Obviously, Kernighan and Pike agree: |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2952 ``Give names to magic numbers''. |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2953 .[ [ |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2954 kernighan pike practice of programming |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2955 .], p. 19] |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2956 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2957 The argument |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2958 .CW outnum |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
2959 of the function |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2960 .Fu scan() |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2961 in |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2962 .Fn uip/scansbr.c |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2963 holds the number of the message to be created. |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2964 As well it encodes program logic with negative numbers and zero. |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2965 This led to obscure code. |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2966 I clarified the code by introducing two variables that extracted |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2967 the hidden information: |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2968 .VS |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2969 int incing = (outnum > 0); |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
2970 int ismbox = (outnum != 0); |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
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|
2971 VE |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2972 The readable names are thus used in conditions; |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
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|
2973 the variable |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2974 .CW outnum |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
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|
2975 is used only to extract ordinary message numbers |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2976 .Ci b8b075c77be7794f3ae9ff0e8cedb12b48fd139f . |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
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|
2977 .P |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2978 Through the clarity improvement of the change detours in the program |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2979 logic of related code parts became apparent. |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2980 The implementation was simplified. |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2981 This possibility to improve had been invisible before |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
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|
2982 .Ci aa60b0ab5e804f8befa890c0a6df0e3143ce0723 . |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
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|
2983 .P |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2984 The names just described were a first step, yet the situation |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2985 was further improved by giving names to the magic values of |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2986 .CW outnum : |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2987 .VS |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2988 #define SCN_MBOX (-1) |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2989 #define SCN_FOLD 0 |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2990 VE |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2991 The two variables were updated thereafter as well: |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2992 .VS |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
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|
2993 int incing = (outnum != SCN_MBOX && outnum != SCN_FOLD); |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
2994 int scanfolder = (outnum == SCN_FOLD); |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
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|
2995 VE |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2996 Furthermore, |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2997 .CW ismbox |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2998 was replaced by |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
2999 .CW scanfolder |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3000 because that matched better to the program logic. |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3001 .Ci 7ffb36d28e517a6f3a10272056fc127592ab1c19 |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3002 |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3003 |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3004 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3005 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3006 .H2 "Structural Rework |
02660c14f6a8
Further re-ordering of the sections.
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parents:
131
diff
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|
3007 .P |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3008 Although the stylistic changes described already improve the |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3009 readability of the source code, all of them were changes ``in the small''. |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
3010 Structural changes, in contrast, affect much larger code areas. |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
3011 They are more difficult to accomplish but lead to larger improvements, |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3012 especially as they often 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
|
3013 .P |
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3014 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
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|
3015 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
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|
3016 .[ [ |
eb6eeb10afd5
Various stuff: Checked quotes, s/further more/furthermore/, etc
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parents:
180
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|
3017 kernighan pike practice of programming |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3018 .], p. 28]. |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3019 Following are two examples of structural rework that demonstrate |
136 | 3020 why style is important in the first place. |
3021 | |
3022 | |
3023 .U3 "Rework of \f(CWanno\fP | |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3024 .P |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3025 Until 2002, |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
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|
3026 .Pn anno |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
3027 had six functional command line switches: |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3028 .Sw -component |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3029 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3030 .Sw -text , |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
3031 each with an argument, |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3032 and the two pairs of flags, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3033 .Sw -[no]date |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3034 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3035 .Sw -[no]inplace . |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3036 Then Jon Steinhart introduced his attachment system. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3037 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
|
3038 .Pn anno . |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3039 He added five more switches: |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3040 .Sw -draft , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3041 .Sw -list , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3042 .Sw -delete , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3043 .Sw -append , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3044 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
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|
3045 .Sw -number , |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
3046 the last one taking an argument |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3047 .Ci 7480dbc14bc90f2d872d434205c0784704213252 . |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3048 Later, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3049 .Sw -[no]preserve |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
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|
3050 was added as well |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3051 .Ci d9b1d57351d104d7ec1a5621f090657dcce8cb7f . |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3052 Then, the Synopsis section of the man page |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
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|
3053 .Mp anno (1) |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3054 read: |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3055 .VS |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3056 anno [+folder] [msgs] [-component f(CIfieldfP] [-inplace | -noinplace] |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
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|
3057 [-date | -nodate] [-draft] [-append] [-list] [-delete] |
219
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
3058 [-number [f(CInumfP|fPallfP]] [-preserve | -nopreserve] [-version] |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
3059 [-help] [-text f(CIbodyfP] |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3060 VE |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3061 .LP |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3062 The implementation followed the same structure. |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
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|
3063 Problems became visible when |
e49780100ffb
Wrote about the rework of anno(1).
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parents:
118
diff
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|
3064 .Cl "anno -list -number 42 |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
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|
3065 worked on the current message instead of on message number 42, |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3066 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3067 .Cl "anno -list -number l:5 |
124 | 3068 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
|
3069 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
|
3070 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
|
3071 There, the correct use of |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3072 .Sw -number |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3073 was defined as being |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3074 .Cl "[-number [num|all]] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3075 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
|
3076 .Sw -list |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3077 read: |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3078 .QS |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3079 The |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3080 .Sw -list |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3081 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
|
3082 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
|
3083 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
|
3084 .Sw -number |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3085 option is also used. |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3086 .QE |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3087 .LP |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3088 The problem was manifold. |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3089 Semantically, the argument to the |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3090 .Sw -number |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3091 switch is only necessary in combination with |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3092 .Sw -delete , |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3093 but not with |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3094 .Sw -list . |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3095 The code, however, required a numeric argument in any case. |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3096 If the argument was missing or non-numeric, |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3097 .Pn anno |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3098 aborted with an error message that additionally had an off-by-one error. |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3099 It printed the name of the switch one before the concerned one. |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3100 .P |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3101 Trying to fix these problems on the surface would not have solved them. |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3102 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
|
3103 structure of the problem and the structure implemented in the program. |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3104 Such structural differences can only be solved by adjusting the |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3105 structure of the implementation to the structure of the problem. |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3106 .P |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3107 Steinhart had added the new |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3108 .Sw -list |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3109 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3110 .Sw -delete |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3111 switches in a style similar to the other switches though |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3112 they are of structural different type. |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3113 Semantically, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3114 .Sw -list |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3115 and |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3116 .Sw -delete |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3117 introduce operation modes. |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3118 Historically, |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3119 .Pn anno |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3120 had only one operation mode: adding header fields. |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3121 With the extension, two more modes were added: |
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 |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3124 fundamental change. |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3125 Neither the implementation nor the documentation did clearly |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3126 declare the exclusive operation modes as such. |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3127 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
|
3128 .Pn anno |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3129 and its documentation |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3130 .Ci d54c8db8bdf01e8381890f7729bc0ef4a055ea11 . |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3131 .P |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3132 The difference is visible in both the code and the documentation. |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3133 For instance in the following code excerpt: |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3134 .VS |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3135 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
|
3136 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
|
3137 [...] |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3138 case DELETESW: /* delete annotations */ |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3139 delete = 0; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3140 continue; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3141 case LISTSW: /* produce a listing */ |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3142 list = 1; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3143 continue; |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3144 VE |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3145 .LP |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3146 which was replaced by: |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3147 .VS |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3148 static enum { MODE_ADD, MODE_DEL, MODE_LIST } mode = MODE_ADD; |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3149 [...] |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3150 case DELETESW: /* delete annotations */ |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3151 mode = MODE_DEL; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3152 continue; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3153 case LISTSW: /* produce a listing */ |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3154 mode = MODE_LIST; |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3155 continue; |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3156 VE |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3157 .LP |
121
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3158 The replacement code does not only reflect the problem's structure better, |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3159 it is easier to understand as well. |
edbc6e1dc636
New text on Standard Libraries plus spellchecking.
markus schnalke <meillo@marmaro.de>
parents:
120
diff
changeset
|
3160 The same applies to the documentation. |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3161 The man page was completely reorganized to propagate the same structure. |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3162 This is already visible in the Synopsis section: |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3163 .VS |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3164 anno [+folder] [msgs] [-component f(CIfieldfP] [-text fPbodyfP] |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3165 [-append] [-date | -nodate] [-preserve | -nopreserve] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3166 [-Version] [-help] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3167 |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3168 anno -delete [+folder] [msgs] [-component fPfieldfP] [-text |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3169 fPbodyfP] [-number fPnum fP| fPall fP] [-preserve | -nopreserve] |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3170 [-Version] [-help] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3171 |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3172 anno -list [+folder] [msgs] [-component fPfieldfP] [-number] |
120
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3173 [-Version] [-help] |
e49780100ffb
Wrote about the rework of anno(1).
markus schnalke <meillo@marmaro.de>
parents:
118
diff
changeset
|
3174 VE |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3175 |
16
81f703140554
Wrote about the trash folder.
markus schnalke <meillo@marmaro.de>
parents:
14
diff
changeset
|
3176 |
0
dc2bfef4cda7
Initial commit: Basic structure, macros and fonts.
markus schnalke <meillo@marmaro.de>
parents:
diff
changeset
|
3177 |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3178 .U3 "Path Conversion |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3179 .P |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3180 Four kinds of path names can appear in MH: |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3181 .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
|
3182 Absolute Unix directory paths, like |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3183 .Fn /etc/passwd . |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3184 .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
|
3185 Relative Unix directory paths, like |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3186 .Fn ./foo/bar . |
171
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|
3187 .LI 3 |
134
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|
3188 Absolute MH folder paths, like |
219
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Further improvements of the discussion chapter.
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|
3189 .Fn +projects/mmh . |
171
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Applied suggestions by Boris.
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|
3190 .LI 4 |
134
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|
3191 Relative MH folder paths, like |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3192 .Fn @subfolder . |
171
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Applied suggestions by Boris.
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169
diff
changeset
|
3193 .LP |
219
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3194 Relative MH folder paths, are hardly documented |
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Further improvements of the discussion chapter.
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diff
changeset
|
3195 although they are useful for large mail storages. |
134
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|
3196 The current mail folder is specified as `\c |
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|
3197 .Fn @ ', |
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133
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|
3198 just like the current directory is specified as `\c |
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|
3199 .Fn . '. |
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diff
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|
3200 .P |
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|
3201 To allow MH tools to understand all four notations, |
219
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Further improvements of the discussion chapter.
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diff
changeset
|
3202 they need to be able to convert between them. |
134
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133
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|
3203 In nmh, these path name conversion functions were located in the files |
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Wrote about path conversion; Dropped the idea to write about scan listings
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|
3204 .Fn sbr/path.c |
edf46861132b
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|
3205 (``return a pathname'') and |
edf46861132b
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|
3206 .Fn sbr/m_maildir.c |
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133
diff
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|
3207 (``get the path for the mail directory''). |
edf46861132b
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133
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|
3208 The seven functions in the two files were documented with no more |
edf46861132b
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|
3209 than two comments, which described obvious information. |
219
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Further improvements of the discussion chapter.
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217
diff
changeset
|
3210 The signatures of the four exported functions did not explain their |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3211 semantics: |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3212 .LI 1 |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3213 .CW "char *path(char *, int); |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3214 .LI 2 |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3215 .CW "char *pluspath(char *); |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
3216 .LI 3 |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3217 .CW "char *m_mailpath(char *); |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3218 .LI 4 |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3219 .CW "char *m_maildir(char *); |
134
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|
3220 .P |
219
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Further improvements of the discussion chapter.
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217
diff
changeset
|
3221 My investigations provided the following descriptions: |
171
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Applied suggestions by Boris.
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|
3222 .LI 1 |
134
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|
3223 The second parameter of |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3224 .Fu path() |
219
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Further improvements of the discussion chapter.
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217
diff
changeset
|
3225 defines the type as which the path given in the first parameter should |
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Further improvements of the discussion chapter.
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|
3226 be treated. |
134
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|
3227 Directory paths are converted to absolute directory paths. |
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|
3228 Folder paths are converted to absolute folder paths. |
173
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Various corrections and improvements.
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|
3229 Folder paths must not include a leading `\fL@\fP' character. |
134
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|
3230 Leading plus characters are preserved. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3231 The result is a pointer to newly allocated memory. |
171
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Applied suggestions by Boris.
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changeset
|
3232 .LI 2 |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
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diff
changeset
|
3233 .Fu pluspath() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3234 is a convenience-wrapper to |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3235 .Fu path() , |
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Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
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|
3236 to convert folder paths only. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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diff
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|
3237 This function can not be used for directory paths. |
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Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3238 An empty string parameter causes a buffer overflow. |
171
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Applied suggestions by Boris.
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169
diff
changeset
|
3239 .LI 3 |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3240 .Fu m_mailpath() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3241 converts directory paths to absolute directory paths. |
173
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Various corrections and improvements.
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171
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changeset
|
3242 The characters `\fL+\fP' or `\fL@\fP' at the beginning of the path name are |
134
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133
diff
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|
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
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|
3244 Hence, this function can not be used for folder paths. |
219
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Further improvements of the discussion chapter.
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217
diff
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|
3245 In any case, the result is an absolute directory path, |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3246 returned as a pointer to newly allocated memory. |
171
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Applied suggestions by Boris.
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parents:
169
diff
changeset
|
3247 .LI 4 |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3248 .Fu m_maildir() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3249 returns the parameter unchanged if it is an absolute directory path |
173
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Various corrections and improvements.
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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
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parents:
133
diff
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|
3251 All other strings are prepended with the current working directory. |
219
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Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3252 Hence, this function can not be used for folder paths. |
134
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 |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3254 directory path, starting with dot or dot-dot. |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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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
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parents:
133
diff
changeset
|
3257 .P |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3258 The situation was obscure, irritating, error-prone, and non-orthogonal. |
219
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Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3259 Additionally, no clear terminology was used to name the different |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3260 kinds of path names. |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3261 Sometimes, the names were even misleading, much as the first argument of |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
changeset
|
3262 .Fu m_mailpath() , |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3263 which was named |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3264 .CW folder , |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3265 although |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3266 .Fu m_mailpath() |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3267 could not be used with MH folder arguments. |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3268 .P |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3269 I clarified the path name conversion by complete rework. |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3270 First of all, the terminology needed to be defined. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3271 A path name is either in the Unix domain, then it is called |
219
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Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3272 \fIdirectory path\fP (\fIdirpath\fP for short) or it is in the MH domain, |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3273 then it is called \fIfolder path\fP (\fIfolpath\fP for short). |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3274 The two terms need to be used with strict distinction. |
219
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Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3275 Often a clear terminology indicates that the problem is understood. |
134
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133
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|
3276 Second, I exploited the concept of path type indicators. |
219
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Further improvements of the discussion chapter.
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217
diff
changeset
|
3277 By requiring every path name to start with a distinct type identifier, |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3278 the conversion between the types could be fully automated. |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
changeset
|
3279 This allows the tools to accept paths of any type from the user. |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
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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
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133
diff
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|
3281 prefixed with a dot character. |
edf46861132b
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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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133
diff
changeset
|
3283 current message. |
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Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3284 .Ci cff0e16925e7edbd25b8b9d6d4fbdf03e0e60c01 |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
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changeset
|
3285 Third, I created three new functions to replace the previous mess: |
171
346ff7e201f5
Applied suggestions by Boris.
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169
diff
changeset
|
3286 .LI 1 |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3287 .Fu expandfol() |
219
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Further improvements of the discussion chapter.
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217
diff
changeset
|
3288 converts folder paths to absolute folder paths. |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
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|
3289 Directory paths are simply passed through. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3290 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
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133
diff
changeset
|
3291 The result is a pointer to static memory. |
171
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Applied suggestions by Boris.
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169
diff
changeset
|
3292 .LI 2 |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3293 .Fu expanddir() |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3294 converts directory paths to absolute directory paths. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3295 Folder paths are treated as relative directory paths. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3296 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
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parents:
133
diff
changeset
|
3297 The result is a pointer to static memory. |
171
346ff7e201f5
Applied suggestions by Boris.
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169
diff
changeset
|
3298 .LI 3 |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3299 .Fu toabsdir() |
edf46861132b
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parents:
133
diff
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|
3300 converts any type of path to an absolute directory path. |
edf46861132b
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parents:
133
diff
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|
3301 This is the function of choice for path conversion. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
changeset
|
3302 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
|
3303 path name. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3304 The result is a pointer to static memory. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
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|
3305 .P |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
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179
diff
changeset
|
3306 .\" XXX ueberfluessig? |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
133
diff
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|
3307 The new functions have names that indicate their use. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
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|
3308 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
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parents:
133
diff
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|
3309 same type. |
edf46861132b
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parents:
133
diff
changeset
|
3310 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
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133
diff
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|
3311 the absolute directory path. |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
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|
3312 All of the functions return pointers to static memory. |
219
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Further improvements of the discussion chapter.
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217
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|
3313 The file |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
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217
diff
changeset
|
3314 .Fn sbr/path.c |
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3315 contains the implementation of the functions; |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
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133
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|
3316 .Fn sbr/m_maildir.c |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3317 was removed. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
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166
diff
changeset
|
3318 .Ci d39e2c447b0d163a5a63f480b23d06edb7a73aa0 |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
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diff
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|
3319 .P |
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Wrote about path conversion; Dropped the idea to write about scan listings
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|
3320 Along with the path conversion rework, I also replaced |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3321 .Fu getfolder(FDEF) |
edf46861132b
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133
diff
changeset
|
3322 with |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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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>
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133
diff
changeset
|
3324 and |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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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
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133
diff
changeset
|
3327 .Fu getcurfol() , |
219
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3328 which only wraps |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3329 .Fu expandfol(""@"") |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3330 for convenience. |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
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|
3331 This code was moved from |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
133
diff
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|
3332 .Fn sbr/getfolder.c |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3333 into |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3334 .Fn sbr/path.c |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3335 as well. |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3336 .Ci d39e2c447b0d163a5a63f480b23d06edb7a73aa0 |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
markus schnalke <meillo@marmaro.de>
parents:
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diff
changeset
|
3337 .P |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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diff
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|
3338 The related function |
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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133
diff
changeset
|
3339 .Fu etcpath() |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3340 is now included in |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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parents:
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|
3341 .Fn sbr/path.c , |
168
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3342 too |
277eeb5ba223
Applied suggestions by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
166
diff
changeset
|
3343 .Ci b4c29794c12099556151d93a860ee51badae2e35 . |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
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|
3344 Previously, it had been located in |
219
8c537982d718
Further improvements of the discussion chapter.
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diff
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|
3345 .Fn config/config.c . |
134
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Wrote about path conversion; Dropped the idea to write about scan listings
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|
3346 .P |
219
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Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3347 Now, |
134
edf46861132b
Wrote about path conversion; Dropped the idea to write about scan listings
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|
3348 .Fn sbr/path.c |
219
8c537982d718
Further improvements of the discussion chapter.
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parents:
217
diff
changeset
|
3349 contains all path handling code. |
8c537982d718
Further improvements of the discussion chapter.
markus schnalke <meillo@marmaro.de>
parents:
217
diff
changeset
|
3350 Besides being less code, its readability is highly improved. |
8c537982d718
Further improvements of the discussion chapter.
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217
diff
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|
3351 The functions follow a common style and are well documented. |
133
02660c14f6a8
Further re-ordering of the sections.
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parents:
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diff
changeset
|
3352 |
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 .H2 "Profile Reading |
02660c14f6a8
Further re-ordering of the sections.
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131
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|
3357 .P |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
diff
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|
3358 The MH profile contains the configuration of a user-specific MH setup. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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parents:
219
diff
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|
3359 MH tools read the profile right after starting up |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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parents:
219
diff
changeset
|
3360 because it contains the location of the user's mail storage |
138
cc35686f359e
Wrote about profile reading.
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136
diff
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|
3361 and similar settings that influence the whole setup. |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
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parents:
219
diff
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|
3362 Furthermore, the profile contains the default switches for the tools |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3363 as well. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3364 The context file is read along with the profile. |
138
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. |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3374 During a 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 .] |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3379 |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3380 .QS |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3381 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
|
3382 agrees and provides an example that convinces me: |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3383 .QS |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3384 My take on this is that |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3385 .Pn post |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3386 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
|
3387 .Fn .mh_profile |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3388 (only front-end UI programs read the profile). |
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3389 .QP |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3390 For example, there can be contexts where |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3391 .Pn post |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3392 is called by a helper program (like `\c |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3393 .Pn mhmail ') |
5c01017be420
Reacted to suggestions by Aaron Mueller.
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parents:
159
diff
changeset
|
3394 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
|
3395 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
|
3396 .QP |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3397 My suggestion would be to have |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3398 .Pn send |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3399 pass a (hidden) `\c |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3400 .Sw -fileproc |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3401 .Ar proc ' |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3402 option to |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3403 .Pn post |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3404 if needed. |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3405 You could also |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3406 use an environment variable (I think |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3407 .Pn send /\c |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3408 .Pn whatnow |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3409 do this). |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3410 .QE |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3411 .sp \n(PDu |
164
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3412 I think that's the way to go. |
5c01017be420
Reacted to suggestions by Aaron Mueller.
markus schnalke <meillo@marmaro.de>
parents:
159
diff
changeset
|
3413 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
|
3414 not an environment variable. |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3415 .QE |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3416 |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3417 .P |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3418 To solve the problem that |
138
cc35686f359e
Wrote about profile reading.
markus schnalke <meillo@marmaro.de>
parents:
136
diff
changeset
|
3419 .Pn post |
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3420 does not honor the |
138
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3421 .Pe fileproc |
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3422 profile entry, |
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3423 the community roughly agreed that a switch |
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Wrote about profile reading.
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3424 .Sw -fileproc |
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Wrote about profile reading.
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3425 should be added to |
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Wrote about profile reading.
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3426 .Pn post |
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3427 to be able to pass a different fileproc. |
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Wrote about profile reading.
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3428 I strongly disagree with this approach because it does not solve |
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3429 the problem; it only removes a single symptom. |
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3430 The actual problem is that |
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3431 .Pn post |
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3432 does not behave as expected, |
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3433 though all programs should behave as expected. |
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3434 Clear and general concepts are a precondition for this. |
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3435 Thus, there should be no separation into ``front-end UI programs'' |
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3436 and ones that ``should not be called by users directly''. |
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3437 The real solution is having all MH tools read the profile. |
138
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3438 .P |
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3439 But the problem has a further aspect, |
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3440 which originates from |
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3441 .Pn mhmail |
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3442 mainly. |
138
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Wrote about profile reading.
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3443 .Pn mhmail |
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Wrote about profile reading.
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|
3444 was intended to be a replacement for |
cc35686f359e
Wrote about profile reading.
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3445 .Pn mailx |
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Wrote about profile reading.
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3446 on systems with MH installations. |
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3447 In difference to |
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3448 .Pn mailx , |
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3449 .Pn mhmail |
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3450 used MH's |
138
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3451 .Pn post |
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3452 to send the message. |
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3453 The idea was that using |
138
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Wrote about profile reading.
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3454 .Pn mhmail |
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3455 should not be influenced whether the user had |
138
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3456 MH set up for himself or not. |
220
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3457 Therefore |
138
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3458 .Pn mhmail |
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3459 had not read the profile. |
138
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3460 As |
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Wrote about profile reading.
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3461 .Pn mhmail |
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Wrote about profile reading.
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|
3462 used |
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Wrote about profile reading.
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3463 .Pn post , |
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3464 .Pn post |
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3465 was not allowed to read the profile neither. |
138
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3466 This is the reason for the actual problem. |
220
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3467 Yet, this was not considered much of a problem because |
138
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3468 .Pn post |
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Wrote about profile reading.
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|
3469 was not intended to be used by users directly. |
220
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3470 To invoke |
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3471 .Pn post , |
138
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|
3472 .Pn send |
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3473 was used an a front-end. |
138
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Wrote about profile reading.
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|
3474 .Pn send |
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Wrote about profile reading.
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|
3475 read the profile and passed all relevant values on the command line to |
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Wrote about profile reading.
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|
3476 .Pn post |
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Wrote about profile reading.
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|
3477 \(en an awkward solution. |
cc35686f359e
Wrote about profile reading.
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|
3478 .P |
cc35686f359e
Wrote about profile reading.
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parents:
136
diff
changeset
|
3479 The important insight is that |
cc35686f359e
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|
3480 .Pn mhmail |
220
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3481 is a wolf in sheep's clothing. |
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|
3482 This alien tool broke the concepts because it was treated like |
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|
3483 a normal MH tool. |
138
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Wrote about profile reading.
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|
3484 Instead it should have been treated accordingly to its foreign style. |
220
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|
3485 .P |
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|
3486 The solution is not to prevent the tools from reading the profile but |
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3487 to instruct them to read a different profile. |
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3488 .Pn mhmail |
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3489 could have set up a well-defined profile and caused the following |
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3490 .Pn post |
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|
3491 to use this profile by exporting an environment variable. |
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3492 With this approach, no special cases would have been introduced |
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3493 and no surprises would have been caused. |
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3494 By writing a wrapper program to provide a clean temporary profile, |
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3495 the concept could have been generalized orthogonally to the whole |
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|
3496 MH tool chest. |
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|
3497 .P |
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|
3498 In mmh, the wish to have |
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3499 .Pn mhmail |
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|
3500 as a replacement for |
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3501 .Pn mailx |
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|
3502 is considered obsolete. |
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|
3503 Mmh's |
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3504 .Pn mhmail |
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|
3505 does no longer cover this use-case |
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3506 .Ci d36e56e695fe1c482c7920644bfbb6386ac9edb0 . |
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3507 Currently, |
138
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3508 .Pn mhmail |
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3509 is in a transition state |
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3510 .Ci 32d4f9daaa70519be3072479232ff7be0500d009 . |
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3511 It may become a front-end to |
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3512 .Pn comp , |
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3513 which provides an alternative interface which can be more convenient |
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3514 in some cases. |
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|
3515 This would convert |
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3516 .Pn mhmail |
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3517 into an ordinary MH tool. |
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3518 If, however, this idea does not convince, then |
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3519 .Pn mhmail |
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3520 will be removed. |
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3521 .P |
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3522 In the mmh tool chest, every program reads the profile. |
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3523 (\c |
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3524 .Pn slocal |
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3525 is not considered part of the mmh tool chest (cf. Sec. |
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3526 .Cf slocal ).) |
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|
3527 Mmh has no |
138
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3528 .Pn post |
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3529 program, but it has |
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3530 .Pn spost , |
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3531 which now does read the profile |
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3532 .Ci 3e017a7abbdf69bf0dff7a4073275961eda1ded8 . |
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3533 Following this change, |
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3534 .Pn send |
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3535 and |
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3536 .Pn spost |
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3537 can be considered for merging. |
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3538 Besides |
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3539 .Pn send , |
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3540 .Pn spost |
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3541 is only invoked directly by the to-be-changed |
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3542 .Pn mhmail |
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3543 implementation and by |
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3544 .Pn rcvdist , |
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3545 which requires rework anyway. |
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3546 |
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3547 .P |
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3548 Jeffrey Honig quoted Marshall T. Rose explaining the decision that |
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3549 .Pn post |
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3550 ignores the profile: |
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3551 .[ |
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3552 nmh-workers honig post profile |
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3553 .] |
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3554 .QS |
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3555 when you run mh commands in a script, you want all the defaults to be |
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3556 what the man page says. |
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3557 when you run a command by hand, then you want your own defaults... |
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3558 .QE |
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3559 .LP |
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3560 The explanation neither matches the problem concered exactly |
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3561 nor is the interpretation clear. |
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3562 If the described desire addresses the technical level, |
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3563 then it conflicts fundametally with the Unix philosophy, |
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3564 precisely because the indistinquishability of human and script |
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3565 input is the main reason for the huge software leverage in Unix. |
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3566 If, however, the described desire addresses the user's view, |
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3567 then different technical solutions are more appropriate. |
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3568 The two cases can be regarded simply as two different MH setups. |
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3569 Hence, mapping the problem of different behavior between interactive and |
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3570 automated use on the concept of switching between different profiles, |
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3571 marks it already solved. |
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3572 |
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3573 |
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3574 |
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3575 .H2 "Standard Libraries |
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3576 .P |
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3577 MH is one decade older than the POSIX and ANSI C standards. |
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3578 Hence, MH included own implementations of functions |
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3579 that were neither standardized nor widely available, back then. |
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3580 Today, twenty years after POSIX and ANSI C were published, |
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3581 developers can expect that systems comply with these standards. |
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3582 In consequence, MH-specific replacements for standard functions |
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3583 can and should be dropped. |
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3584 Kernighan and Pike advise: ``Use standard libraries''. |
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3585 .[ [ |
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3586 kernighan pike practice of programming |
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3587 .], p. 196] |
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3588 Actually, MH had followed this advice in history, |
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3589 but it had not adjusted to more recent changes in this field. |
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3590 The |
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3591 .Fu snprintf() |
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3592 function, for instance, was standardized with C99 and is available |
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3593 almost everywhere because of its high usefulness. |
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3594 Thus, the project's own implementation of |
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3595 .Fu snprintf() |
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3596 was dropped in March 2012 in favor for using the one of the |
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3597 standard library |
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3598 .Ci 0052f1024deb0a0a2fc2e5bacf93d45a5a9c9b32 . |
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3599 Such decisions limit the portability of mmh |
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3600 if systems do not support these standardized and widespread functions. |
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3601 This compromise is made because mmh focuses on the future. |
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3602 .P |
180
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3603 .\" XXX kuerzen und mit dem naechsten Absatz vereinen |
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3604 As I am still in my twenties, have no programming experience from |
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3605 past decades. |
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3606 I have not followed the evolution of C through time. |
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3607 I have not suffered from the the Unix wars. |
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3608 I have not longed for standardization. |
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3609 All my programming experience is from a time when ANSI C and POSIX |
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3610 were well established already. |
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3611 Thus, I needed to learn about the history in retrospective. |
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3612 I have only read a lot of books about the (good) old times. |
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3613 This put me in a difficult position when working with old code. |
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3614 I need to freshly acquire knowledge about old code constructs and ancient |
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3615 programming styles, whereas older programmers know these things by |
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3616 heart from their own experience. |
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3617 Being aware of the situation, I rather let people with more historic |
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3618 experience do the transition from ancient code constructs to |
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3619 standardized ones. |
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3620 Lyndon Nerenberg covered large parts of this task for the nmh project. |
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3621 He converted project-specific functions to POSIX replacements, |
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3622 also removing the conditionals compilation of now standardized features. |
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3623 Ken Hornstein and David Levine had their part in this work, as well. |
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3624 Often, I only pulled the changes over from nmh into mmh. |
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3625 These changes include many commits, among them: |
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3626 .Ci 768b5edd9623b7238e12ec8dfc409b82a1ed9e2d |
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3627 .Ci 0052f1024deb0a0a2fc2e5bacf93d45a5a9c9b32 . |
102
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3628 .P |
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3629 Nevertheless, I worked on the task as well, tidying up the |
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3630 \fIMH standard library\fP, |
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3631 .Fn libmh.a . |
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3632 It is located in the |
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3633 .Fn sbr |
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3634 (``subroutines'') directory in the source tree and |
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3635 includes functions that mmh tools usually need. |
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3636 Among them are MH-specific functions for profile, context, sequence, |
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3637 and folder handling, but as well |
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3638 MH-independent functions, such as auxiliary string functions, |
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3639 portability interfaces and error-checking wrappers for critical |
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3640 functions of the standard library. |
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3641 .BU |
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3642 I have replaced the |
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3643 .Fu atooi() |
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3644 function with calls to |
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3645 .Fu strtoul() , |
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3646 setting the third parameter, the base, to eight. |
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3647 .Fu strtoul() |
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3648 is part of C89 and thus considered safe to use |
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3649 .Ci c490c51b3c0f8871b6953bd0c74551404f840a74 . |
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3650 .BU |
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3651 I did remove project-included fallback implementations of |
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3652 .Fu memmove() |
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3653 and |
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3654 .Fu strerror() |
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3655 .Ci b067ff5c465a5d243ce5a19e562085a9a1a97215 , |
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3656 although Peter Maydell had re-included them into nmh in 2008 |
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3657 to support SunOS 4. |
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3658 Nevertheless, these functions are part of ANSI C. |
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3659 Systems that do not even provide full ANSI C support should not |
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3660 put a load on mmh. |
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3661 .BU |
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3662 The |
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3663 .Fu copy() |
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3664 function copies the string in parameter one to the location in |
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3665 parameter two. |
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3666 In contrast to |
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3667 .Fu strcpy() , |
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3668 it returns a pointer to the terminating null-byte in the destination area. |
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3669 The code was adjusted to replace |
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3670 .Fu copy() |
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3671 with |
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3672 .Fu strcpy() , |
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3673 except within |
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3674 .Fu concat() , |
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3675 where |
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3676 .Fu copy() |
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3677 was more convenient. |
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3678 Therefore, the definition of |
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3679 .Fu copy() |
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3680 was moved into the source file of |
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3681 .Fu concat() |
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3682 and its visibility it limited to that |
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3683 .Ci 552fd7253e5ee9e554c5c7a8248a6322aa4363bb . |
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3684 .BU |
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3685 The function |
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3686 .Fu r1bindex() |
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3687 had been a generalized version of |
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3688 .Fu basename() |
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3689 with minor differences. |
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3690 As all calls to |
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3691 .Fu r1bindex() |
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3692 had the slash (`\fL/\fP') as delimiter anyway, |
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3693 replacing |
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3694 .Fu r1bindex() |
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3695 with the more specific and better-named function |
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3696 .Fu basename() |
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3697 became desirable. |
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3698 Unfortunately, many of the 54 calls to |
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3699 .Fu r1bindex() |
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3700 depended on a special behavior, |
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3701 which differed from the POSIX specification for |
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3702 .Fu basename() . |
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3703 Hence, |
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3704 .Fu r1bindex() |
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3705 was kept but renamed to |
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3706 .Fu mhbasename() , |
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3707 setting the delimiter to the slash |
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3708 .Ci 240013872c392fe644bd4f79382d9f5314b4ea60 . |
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3709 For possible uses of |
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3710 .Fu r1bindex() |
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3711 with a different delimiter, |
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3712 the ANSI C function |
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3713 .Fu strrchr() |
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3714 provides the core functionality. |
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3715 .BU |
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3716 The |
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3717 .Fu ssequal() |
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3718 function \(en apparently for ``substring equal'' \(en |
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3719 was renamed to |
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3720 .Fu isprefix() , |
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3721 because this is what it actually checked |
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3722 .Ci c20b4fa14515c7ab388ce35411d89a7a92300711. |
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3723 Its source file had included both of the following comments, no joke. |
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3724 .in -\n(PIu |
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3725 .VS |
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3726 /* |
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3727 * THIS CODE DOES NOT WORK AS ADVERTISED. |
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3728 * It is actually checking if s1 is a PREFIX of s2. |
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3729 * All calls to this function need to be checked to see |
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3730 * if that needs to be changed. Prefix checking is cheaper, so |
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3731 * should be kept if it's sufficient. |
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3732 */ |
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3733 |
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3734 /* |
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3735 * Check if s1 is a substring of s2. |
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3736 * If yes, then return 1, else return 0. |
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3737 */ |
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3738 VE |
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3739 .in +\n(PIu |
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3740 Eventually, the function was completely replaced with calls to |
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3741 .Fu strncmp() |
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3742 .Ci b0b1dd37ff515578cf7cba51625189eb34a196cb . |
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3743 |
118
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3744 |
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3745 |
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3746 |
133
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3747 |
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3748 .H2 "User Data Locations |
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3749 .P |
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3750 In nmh, a personal setup consists of the MH profile and the MH directory. |
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3751 The profile is a file named |
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3752 .Fn \&.mh_profile |
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3753 in the user's home directory. |
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3754 It contains the static configuration. |
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3755 It also contains the location of the MH directory in the profile entry |
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3756 .Pe Path . |
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3757 The MH directory contains the mail storage and is the first |
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3758 place to search for form files, scan formats, and similar |
133
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3759 configuration files. |
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3760 The location of the MH directory can be chosen freely by the user. |
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3761 The usual name is a directory named |
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3762 .Fn Mail |
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3763 in the user's home directory. |
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3764 .P |
200 | 3765 The way MH data is split between profile and MH directory is a legacy. |
133
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3766 It is only sensible in a situation where the profile is the only |
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3767 configuration file. |
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3768 Why else should the mail storage and the configuration files be intermixed? |
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3769 They are of different kind: |
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3770 One kind is the data to be operated on and the other kind is |
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3771 the configuration to change how tools operate. |
133
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3772 Splitting the configuration between the profile and the MH directory |
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3773 is inappropriate, as well. |
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3774 I improved the situation by breaking compatibility. |
133
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3775 .P |
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3776 In mmh, personal data is grouped by type. |
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3777 This results in two distinct parts: |
171
346ff7e201f5
Applied suggestions by Boris.
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diff
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|
3778 the mail storage and the configuration. |
220
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Further improvements in the discussion; added build dependency graphs.
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|
3779 The mail storage directory still contains all the messages, |
133
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Further re-ordering of the sections.
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|
3780 but, in exception of public sequences files, nothing else. |
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|
3781 In difference to nmh, the auxiliary configuration files are no longer |
02660c14f6a8
Further re-ordering of the sections.
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diff
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|
3782 located there. |
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Further re-ordering of the sections.
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diff
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|
3783 Therefore, the directory is no longer called the user's \fIMH directory\fP |
220
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Further improvements in the discussion; added build dependency graphs.
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|
3784 but the user's \fImail storage\fP. |
133
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diff
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|
3785 Its location is still user-chosen, with the default name |
220
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|
3786 .Fn Mail |
133
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Further re-ordering of the sections.
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|
3787 in the user's home directory. |
220
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Further improvements in the discussion; added build dependency graphs.
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|
3788 The configuration is grouped together in the hidden directory |
133
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Further re-ordering of the sections.
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|
3789 .Fn \&.mmh |
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Further re-ordering of the sections.
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|
3790 in the user's home directory. |
02660c14f6a8
Further re-ordering of the sections.
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diff
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|
3791 This \fImmh directory\fP contains the context file, personal forms, |
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Further re-ordering of the sections.
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131
diff
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|
3792 scan formats, and the like, but also the user's profile, now named |
02660c14f6a8
Further re-ordering of the sections.
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|
3793 .Fn profile . |
220
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Further improvements in the discussion; added build dependency graphs.
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diff
changeset
|
3794 The path to the profile is no longer |
133
02660c14f6a8
Further re-ordering of the sections.
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131
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|
3795 .Fn $HOME/.mh_profile |
220
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Further improvements in the discussion; added build dependency graphs.
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219
diff
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|
3796 but |
133
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Further re-ordering of the sections.
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changeset
|
3797 .Fn $HOME/.mmh/profile . |
220
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Further improvements in the discussion; added build dependency graphs.
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|
3798 (The alternative of having file |
133
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|
3799 .Fn $HOME/.mh_profile |
220
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|
3800 and a configuration directory |
133
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|
3801 .Fn $HOME/.mmh |
220
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Further improvements in the discussion; added build dependency graphs.
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|
3802 appeared to be inconsistent.) |
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Further improvements in the discussion; added build dependency graphs.
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|
3803 .P |
133
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Further re-ordering of the sections.
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|
3804 The approach chosen for mmh is consistent, simple, and familiar to |
02660c14f6a8
Further re-ordering of the sections.
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|
3805 Unix users. |
220
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Further improvements in the discussion; added build dependency graphs.
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|
3806 The main achievement of the change is the clear and sensible separation |
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Further improvements in the discussion; added build dependency graphs.
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|
3807 of the mail storage and the configuration. |
168
277eeb5ba223
Applied suggestions by Lydi.
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166
diff
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|
3808 .Ci 7030d7edb099bff36ded7548bb5380f7acab4f9b |
133
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Further re-ordering of the sections.
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|
3809 .P |
220
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Further improvements in the discussion; added build dependency graphs.
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diff
changeset
|
3810 As MH allows users to have multiple MH setups, |
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Further improvements in the discussion; added build dependency graphs.
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diff
changeset
|
3811 it is necessary to switch the profile. |
133
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Further re-ordering of the sections.
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131
diff
changeset
|
3812 The profile is the single entry point to access the rest of a |
02660c14f6a8
Further re-ordering of the sections.
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parents:
131
diff
changeset
|
3813 personal MH setup. |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3814 In nmh, the environment variable |
02660c14f6a8
Further re-ordering of the sections.
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parents:
131
diff
changeset
|
3815 .Ev MH |
220
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Further improvements in the discussion; added build dependency graphs.
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219
diff
changeset
|
3816 is used to specify a different profile. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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parents:
219
diff
changeset
|
3817 To operate in the same MH setup with a separate context, the |
133
02660c14f6a8
Further re-ordering of the sections.
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parents:
131
diff
changeset
|
3818 .Ev MHCONTEXT |
220
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Further improvements in the discussion; added build dependency graphs.
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219
diff
changeset
|
3819 environment variable is used. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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parents:
219
diff
changeset
|
3820 This allows having a separate current folder in each terminal at |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3821 the same time, for instance. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3822 In mmh, three environment variables replace the two of nmh. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3823 .Ev MMH |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3824 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
|
3825 .Fn .mmh ). |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3826 .Ev MMHP |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3827 and |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3828 .Ev MMHC |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3829 override the paths to the profile and context file, respectively. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3830 This approach allows the set of personal configuration files to be chosen |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3831 independently of the profile, context, and mail storage. |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3832 The new approach has no functional disadvantages, |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3833 as every setup I can imagine can be implemented with both approaches, |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
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parents:
219
diff
changeset
|
3834 possibly even easier with the new one. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3835 .Ci 7030d7edb099bff36ded7548bb5380f7acab4f9b |
133
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3836 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3837 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3838 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3839 |
02660c14f6a8
Further re-ordering of the sections.
markus schnalke <meillo@marmaro.de>
parents:
131
diff
changeset
|
3840 |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3841 .H2 "Modularization |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3842 .Id modularization |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
markus schnalke <meillo@marmaro.de>
parents:
116
diff
changeset
|
3843 .P |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3844 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
|
3845 .Fn uip |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3846 (``user interface programs'') directory. |
180
731e747a805b
Applied corrections by Lydi.
markus schnalke <meillo@marmaro.de>
parents:
179
diff
changeset
|
3847 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
|
3848 For example, |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3849 .Pn rmm |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3850 is built from |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3851 .Fn uip/rmm.c . |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3852 Some source files are used for multiple programs. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3853 For example |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3854 .Fn uip/scansbr.c |
173
4c7db172fb59
Various corrections and improvements.
markus schnalke <meillo@marmaro.de>
parents:
171
diff
changeset
|
3855 is used for both |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3856 .Pn scan |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3857 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3858 .Pn inc . |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3859 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
|
3860 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
|
3861 32 programs depended on multiple source files; |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3862 17 programs depended on one source file only. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3863 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
|
3864 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
|
3865 18 programs depend on multiple source files; |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3866 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
|
3867 (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
|
3868 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
|
3869 .\" XXX graph |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3870 .P |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3871 Splitting the source code of a large program into multiple files can |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3872 increase the readability of its source code, |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3873 but most of the mmh tools are small and straight-forward programs. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3874 In exception of the MIME handling tools (i.e. |
122
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3875 .Pn mhbuild , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3876 .Pn mhstore , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3877 .Pn show , |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3878 etc.), |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3879 .Pn pick |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3880 is the only tool with more than one thousand lines of source code. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3881 Splitting programs with less than one thousand lines of code into |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3882 multiple source files leads seldom to better readability. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3883 For such tools, splitting still makes sense |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
3884 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
|
3885 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
|
3886 for including it in the MH library |
b59201e345e5
Applied further corrections by Aaron.
markus schnalke <meillo@marmaro.de>
parents:
178
diff
changeset
|
3887 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
|
3888 .Fn uip/packsbr.c , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3889 for instance, provides the core program logic for the |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3890 .Pn packf |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3891 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3892 .Pn rcvpack |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3893 programs. |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3894 .Fn uip/packf.c |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3895 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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3896 .Fn uip/rcvpack.c |
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|
3897 mainly wrap the core function appropriately. |
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Wrote about modularization.
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|
3898 No other tools use the folder packing functions. |
123
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Reworked and extended the text about Modularization.
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3899 As another example, |
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Reworked and extended the text about Modularization.
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3900 .Fn uip/termsbr.c |
220
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Further improvements in the discussion; added build dependency graphs.
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3901 accesses terminal properties, which requires linking with the |
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|
3902 \fItermcap\fP or a \fIcurses\fP library. |
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|
3903 If |
123
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Reworked and extended the text about Modularization.
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3904 .Fn uip/termsbr.c |
220
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|
3905 is included in the MH library, then every program needs to be linked |
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|
3906 with termcap or curses, although only few of the programs use |
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|
3907 the library. |
122
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Wrote about modularization.
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3908 .P |
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3909 The task of MIME handling is complex enough that splitting its code |
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3910 into multiple source files improves the readability. |
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Wrote about modularization.
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|
3911 The program |
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Wrote about modularization.
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|
3912 .Pn mhstore , |
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Wrote about modularization.
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|
3913 for instance, is compiled out of seven source files with 2\|500 |
c234656329e0
Wrote about modularization.
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3914 lines of code in summary. |
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Wrote about modularization.
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|
3915 The main code file |
c234656329e0
Wrote about modularization.
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|
3916 .Fn uip/mhstore.c |
220
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Further improvements in the discussion; added build dependency graphs.
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|
3917 consists of 800 lines; the other 1\|700 lines are code reused in |
123
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Reworked and extended the text about Modularization.
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|
3918 other MIME handling tools. |
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Reworked and extended the text about Modularization.
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3919 It seems to be worthwhile to bundle the generic MIME handling code into |
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3920 a MH-MIME library, as a companion to the MH standard library. |
220
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|
3921 This is left to be done. |
118
48e28eaee6f9
Wrote intro to Modernizing and new text about Code Style.
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|
3922 .P |
169
f4ffe121a0a2
Applied excellent suggestions and corrections by Kate.
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|
3923 The work already accomplished focussed on the non-MIME tools. |
122
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|
3924 The amount of code compiled into each program was reduced. |
123
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|
3925 This eases the understanding of the code base. |
122
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|
3926 In nmh, |
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Wrote about modularization.
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|
3927 .Pn comp |
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Wrote about modularization.
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|
3928 was built from six source files: |
c234656329e0
Wrote about modularization.
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parents:
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|
3929 .Fn comp.c , |
c234656329e0
Wrote about modularization.
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parents:
121
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|
3930 .Fn whatnowproc.c , |
c234656329e0
Wrote about modularization.
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|
3931 .Fn whatnowsbr.c , |
c234656329e0
Wrote about modularization.
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|
3932 .Fn sendsbr.c , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
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|
3933 .Fn annosbr.c , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
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|
3934 and |
c234656329e0
Wrote about modularization.
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|
3935 .Fn distsbr.c . |
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Wrote about modularization.
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|
3936 In mmh, it builds from only two: |
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Wrote about modularization.
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|
3937 .Fn comp.c |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
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|
3938 and |
c234656329e0
Wrote about modularization.
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parents:
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|
3939 .Fn whatnowproc.c . |
123
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Reworked and extended the text about Modularization.
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parents:
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|
3940 In nmh's |
740f4128dea7
Reworked and extended the text about Modularization.
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|
3941 .Pn comp , |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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|
3942 the core function of |
122
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Wrote about modularization.
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|
3943 .Pn whatnow , |
c234656329e0
Wrote about modularization.
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parents:
121
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|
3944 .Pn send , |
c234656329e0
Wrote about modularization.
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parents:
121
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|
3945 and |
c234656329e0
Wrote about modularization.
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|
3946 .Pn anno |
220
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Further improvements in the discussion; added build dependency graphs.
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|
3947 were all compiled into |
122
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Wrote about modularization.
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parents:
121
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|
3948 .Pn comp . |
123
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Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
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|
3949 This saved the need to execute these programs with |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
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|
3950 the expensive system calls |
122
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Wrote about modularization.
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|
3951 .Fu fork() |
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Wrote about modularization.
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121
diff
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|
3952 and |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
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|
3953 .Fu exec() . |
171
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3954 Whereas this approach improved the time performance, |
346ff7e201f5
Applied suggestions by Boris.
markus schnalke <meillo@marmaro.de>
parents:
169
diff
changeset
|
3955 it interwove the source code. |
122
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121
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|
3956 Core functionalities were not encapsulated into programs but into |
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Wrote about modularization.
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|
3957 function, which were then wrapped by programs. |
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Wrote about modularization.
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diff
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|
3958 For example, |
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Wrote about modularization.
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|
3959 .Fn uip/annosbr.c |
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Wrote about modularization.
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parents:
121
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|
3960 included the function |
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Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
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|
3961 .Fu annotate() . |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
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|
3962 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:
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|
3963 .Fn uip/annosbr.c |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
3964 and called |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
changeset
|
3965 .Fu annotate() . |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
3966 Because the function |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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122
diff
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|
3967 .Fu annotate() |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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122
diff
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|
3968 was used like the tool |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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122
diff
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|
3969 .Pn anno , |
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
3970 it had seven parameters, reflecting the command line switches of the tool. |
122
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Wrote about modularization.
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121
diff
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|
3971 When another pair of command line switches was added to |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
3972 .Pn anno , |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
3973 a rather ugly hack was implemented to avoid adding another parameter |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
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|
3974 to the function |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
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|
3975 .Ci d9b1d57351d104d7ec1a5621f090657dcce8cb7f . |
122
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Wrote about modularization.
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|
3976 .P |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3977 In mmh, the relevant code of |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3978 .Pn comp |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
3979 comprises the two files |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
3980 .Fn uip/comp.c |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3981 and |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
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|
3982 .Fn uip/whatnowproc.c , |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
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|
3983 together 210 lines of code, |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
diff
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|
3984 whereas in nmh, |
122
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Wrote about modularization.
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parents:
121
diff
changeset
|
3985 .Pn comp |
c234656329e0
Wrote about modularization.
markus schnalke <meillo@marmaro.de>
parents:
121
diff
changeset
|
3986 comprises six files with 2\|450 lines. |
220
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Further improvements in the discussion; added build dependency graphs.
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parents:
219
diff
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|
3987 Not all of the code in these six files is actually used by |
122
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Wrote about modularization.
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121
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|
3988 .Pn comp , |
220
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Further improvements in the discussion; added build dependency graphs.
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219
diff
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|
3989 but the reader needed to read it all to know which parts are relevant. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
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|
3990 Understanding nmh's |
122
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Wrote about modularization.
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121
diff
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|
3991 .Pn comp , |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
parents:
122
diff
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|
3992 required understanding the inner workings of |
122
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Wrote about modularization.
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121
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|
3993 .Fn uip/annosbr.c |
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Wrote about modularization.
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121
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|
3994 first. |
123
740f4128dea7
Reworked and extended the text about Modularization.
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122
diff
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|
3995 To be sure to fully understand a program, its whole source code needs |
122
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Wrote about modularization.
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121
diff
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|
3996 to be examined. |
123
740f4128dea7
Reworked and extended the text about Modularization.
markus schnalke <meillo@marmaro.de>
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122
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|
3997 Not doing so is a leap of faith, assuming that the developers |
122
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Wrote about modularization.
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121
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|
3998 have avoided obscure programming techniques. |
220
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
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|
3999 Here, it should be recalled that information passed in obscure ways |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
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|
4000 through the program's source base, due to the aforementioned hack |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
diff
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|
4001 to save an additional parameter in nmh's |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
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|
4002 .Pn anno . |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
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|
4003 .P |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
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|
4004 In mmh, understanding |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
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219
diff
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|
4005 .Pn comp |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
4006 requires to read only 210 lines of code to read, whereas the amount |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
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|
4007 is ten times more for nmh's |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
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219
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|
4008 .Pn comp . |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
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|
4009 .P |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
changeset
|
4010 By separating the tools on the program-level, |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
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|
4011 the boundaries are clearly visible, as the interfaces are calls to |
122
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121
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|
4012 .Fu exec() |
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Wrote about modularization.
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121
diff
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|
4013 rather than arbitrary function calls. |
220
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219
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|
4014 Additionally, this kind of separation is more strict because |
95257474a123
Further improvements in the discussion; added build dependency graphs.
markus schnalke <meillo@marmaro.de>
parents:
219
diff
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|
4015 it is technically enforced by the operating system; |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
diff
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|
4016 it can not be simply bypassed with global variables. |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
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|
4017 Good separation simplifies the understanding of program code |
95257474a123
Further improvements in the discussion; added build dependency graphs.
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219
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|
4018 because the area influenced by any particular statement is small. |
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4019 As I have read a lot in nmh's code base during the last two years, |
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4020 I have learned about the easy and the difficult parts. |
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4021 In my observation, the understanding of code is enormously eased |
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4022 if the influenced area is small and clearly bounded. |
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4023 .P |
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4024 Yet, the real problem is another: |
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4025 Nmh violates the golden ``one tool, one job'' rule of the Unix philosophy. |
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4026 Understanding |
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4027 .Pn comp |
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4028 requires understanding |
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4029 .Fn uip/annosbr.c |
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4030 and |
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4031 .Fn uip/sendsbr.c |
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4032 because |
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4033 .Pn comp |
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4034 annotates and sends messages. |
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4035 In nmh, there surely exist the tools |
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4036 .Pn anno |
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4037 and |
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4038 .Pn send , |
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4039 which cover these jobs, |
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4040 but |
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4041 .Pn comp |
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4042 and |
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4043 .Pn repl |
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4044 and |
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4045 .Pn forw |
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4046 and |
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4047 .Pn dist |
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4048 and |
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4049 .Pn whatnow |
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4050 and |
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4051 .Pn viamail |
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4052 \(en they all (!) \(en |
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4053 have the same annotating and sending functions included, once more. |
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4054 As a result, |
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4055 .Pn comp |
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4056 sends messages without using |
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4057 .Pn send . |
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4058 The situation is the same as if |
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4059 .Pn grep |
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4060 would page its output without using |
123
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4061 .Pn more |
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4062 just because both programs are part of the same code base. |
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4063 .P |
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4064 The clear separation on the surface of nmh |
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4065 \(en the tool chest approach \(en |
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4066 is violated on the level below. |
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4067 This violation is for the sake of time performance. |
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4068 Decades ago, sacrificing readability and conceptional beauty |
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4069 for speed might have been necessary to prevent MH from being |
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4070 unusably slow, but today this is not the case anymore. |
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4071 No longer should speed improvements that became unnecessary be kept. |
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4072 No longer should readability or conceptional beauty be sacrificed. |
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4073 No longer should the Unix philosophy's ``one tool, one job'' |
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4074 guideline be violated. |
123
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4075 Therefore, mmh's |
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4076 .Pn comp |
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4077 no longer sends messages. |
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4078 .P |
123
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4079 In mmh, different jobs are divided among separate programs that |
122
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4080 invoke each other as needed. |
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4081 In consequence, |
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4082 .Pn comp |
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4083 invokes |
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4084 .Pn whatnow |
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4085 which thereafter invokes |
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4086 .Pn send |
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4087 .Ci 3df5ab3c116e6d4a2fb4bb5cc9dfc5f781825815 |
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4088 .Ci c73c00bfccd22ec77e9593f47462aeca4a8cd9c0 . |
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4089 The clear separation on the surface is maintained on the level below. |
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4090 Human users and other tools use the same interface \(en |
123
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4091 annotations, for example, are made by invoking |
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4092 .Pn anno , |
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4093 no matter if requested by programs or by human beings |
168
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4094 .Ci 469a4163c2a1a43731d412eaa5d9cae7d670c48b |
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4095 .Ci aed384169af5204b8002d06e7a22f89197963d2d |
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4096 .Ci 3caf9e298a8861729ca8b8a84f57022b6f3ea742 . |
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4097 The decrease of tools built from multiple source files and thus |
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4098 the decrease of |
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4099 .Fn uip/*sbr.c |
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4100 files confirm the improvement |
168
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4101 .Ci 9e6d91313f01c96b4058d6bf419a8ca9a207bc33 |
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4102 .ci 81744a46ac9f845d6c2b9908074d269275178d2e |
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4103 .Ci f0f858069d21111f0dbea510044593f89c9b0829 |
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4104 .Ci 0503a6e9be34f24858b55b555a5c948182b9f24b |
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4105 .Ci 27826f9353e0f0b04590b7d0f8f83e60462b90f0 |
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4106 .Ci d1da1f94ce62160aebb30df4063ccbc53768656b |
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4107 .Ci c42222869e318fff5dec395eca3e776db3075455 . |
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4108 This is also visible in the complexity of the build dependency graphs: |
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4109 |
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4110 .sp |
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4111 Nmh: |
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4112 .BP input/deps-nmh.eps .5i |
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4113 .EP |
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4114 .sp |
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4115 Mmh: |
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4116 .BP input/deps-mmh.eps .8i |
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4117 .EP |
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4118 |
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4119 The figures display all program to source file relationships |
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4120 that are not one-to-one, |
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4121 i.e. all programs that are built from multiple source files. |
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4122 The primary source file of each program is omited from the graph. |