annotate lib-src/cvtmail.c @ 4940:9113c5044de8

(for main branch) add long comment about types of magic symbols -------------------- ChangeLog entries follow: -------------------- src/ChangeLog addition: 2010-01-20 Ben Wing <ben@xemacs.org> * symbols.c: Add long comment about the types of magic symbols, and the various declarations that go along with them.
author Ben Wing <ben@xemacs.org>
date Wed, 20 Jan 2010 22:30:33 -0600
parents 023b83f4e54b
children cd167465bf69 061f4f90f874
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1 /* Copyright (C) 1985, 1993, 1994 Free Software Foundation
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2 This file is part of XEmacs.
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3
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4 XEmacs is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 2, or (at your option)
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7 any later version.
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8
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9 XEmacs is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with XEmacs; see the file COPYING. If not, write to
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16 the Free the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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17 Boston, MA 02111-1307, USA. */
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18
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19 /* Synched up with: FSF 19.28. */
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20
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21 /* cvtmail:
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22 * Program to convert oldstyle goslings emacs mail directories into
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23 * gnu-rmail format. Program expects a directory called Messages to
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24 * exist in your home directory, containing individual mail messages in
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25 * separate files in the standard gosling emacs mail reader format.
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26 *
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27 * Program takes one argument: an output file. This file will contain
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28 * all the messages in Messages directory, in berkeley mail format.
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29 * If no output file is mentioned, messages are put in ~/OMAIL.
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30 *
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31 * In order to get rmail to read the messages, the resulting file must
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32 * be mv'ed to ~/mbox, and then have rmail invoked on them.
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33 *
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34 * Author: Larry Kolodney, 1985
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35 */
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36
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37
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38 #include <config.h>
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39
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40 #include <stdio.h>
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41 #include <string.h>
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42 #include <stdlib.h>
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43
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44 static void *xmalloc (size_t);
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45 static void *xrealloc (void *, size_t);
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46 static void skip_to_lf (FILE *stream);
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47 static void fatal (const char *s1, const char *s2);
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48 static void error (const char *s1, const char *s2);
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49
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50 int
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51 main (int argc, char *argv[])
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52 {
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53 char *hd;
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54 char *md;
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55 char *mdd;
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56 char *mfile;
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57 char *cf;
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58 int cflen;
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59 FILE *mddf;
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60 FILE *mfilef;
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61 FILE *cff;
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62 char pre[10];
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63 char name[14];
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64 int c;
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65
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66 hd = getenv ("HOME");
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67
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68 md = (char *) xmalloc (strlen (hd) + 10);
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69 strcpy (md, hd);
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70 strcat (md, "/Messages");
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71
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72 mdd = (char *) xmalloc (strlen (md) + 11);
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73 strcpy (mdd, md);
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74 strcat (mdd, "/Directory");
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75
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76 cflen = 100;
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77 cf = (char *) xmalloc (cflen);
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78
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79 mddf = fopen (mdd, "r");
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80 if (argc > 1)
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81 mfilef = fopen (argv[1], "w");
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82 else
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83 {
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84 mfile = (char *) xmalloc (strlen (hd) + 7);
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85 strcpy (mfile, hd);
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86 strcat (mfile, "/OMAIL");
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87 mfilef = fopen (mfile, "w");
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88 }
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89 skip_to_lf (mddf);
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90 while (fscanf (mddf, "%4c%14[0123456789]", pre, name) != EOF)
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91 {
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92 int comp_len = strlen (md) + strlen (name) + 2;
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93 if (cflen < comp_len)
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94 {
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95 cflen = strlen (md) + strlen (name) + 2;
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96 cf = (char *) xrealloc (cf, cflen);
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97 }
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98 strcpy (cf, md);
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99 strcat (cf,"/");
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100 strcat (cf, name);
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101 cff = fopen (cf, "r");
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102 while ((c = getc(cff)) != EOF)
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103 putc (c, mfilef);
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104 putc ('\n', mfilef);
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105 skip_to_lf (mddf);
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106 fclose (cff);
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107 }
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108 fclose (mddf);
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109 fclose (mfilef);
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110 return 0;
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111 }
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112
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113 static void
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114 skip_to_lf (FILE *stream)
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115 {
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116 register int c;
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117 while ((c = getc(stream)) != '\n')
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118 ;
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119 }
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120
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121 static void *
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122 xmalloc (size_t size)
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123 {
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124 void *result = malloc (size);
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125 if (!result)
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126 fatal ("virtual memory exhausted", 0);
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127 return result;
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128 }
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129
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130 static void *
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131 xrealloc (void *ptr, size_t size)
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132 {
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133 void *result = realloc (ptr, size);
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134 if (!result)
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135 fatal ("virtual memory exhausted", 0);
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136 return result;
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137 }
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138
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139 /* Print error message and exit. */
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140
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141 static void
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142 fatal (const char *s1, const char *s2)
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143 {
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144 error (s1, s2);
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145 exit (1);
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146 }
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147
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148 static void
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149 error (const char *s1, const char *s2)
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150 {
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151 fprintf (stderr, "cvtmail: ");
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152 fprintf (stderr, s1, s2);
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153 fprintf (stderr, "\n");
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154 }