code.delx.au - gnu-emacs/blob - lib-src/cvtmail.c

   1 /* Copyright (C) 1985, 1994 Free Software Foundation
   2
   3 This file is part of GNU Emacs.
   4
   5 GNU Emacs is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 GNU Emacs is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with GNU Emacs; see the file COPYING.  If not, write to
  17 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.  */
  19
  20 /* cvtmail:
  21  * Program to convert oldstyle goslings emacs mail directories into
  22  * gnu-rmail format.  Program expects a directory called Messages to
  23  * exist in your home directory, containing individual mail messages in
  24  * separate files in the standard gosling emacs mail reader format.
  25  *
  26  * Program takes one argument: an output file.  This file will contain
  27  * all the messages in Messages directory, in berkeley mail format.
  28  * If no output file is mentioned, messages are put in ~/OMAIL.
  29  *
  30  * In order to get rmail to read the messages, the resulting file must
  31  * be mv'ed to ~/mbox, and then have rmail invoked on them.
  32  *
  33  * Author: Larry Kolodney, 1985
  34  */
  35
  36
  37 #include <stdio.h>
  38
  39 #ifdef __GNU_LIBRARY__
  40 # include <string.h>
  41 #endif
  42
  43 char *malloc ();
  44 char *realloc ();
  45 char *getenv ();
  46
  47 char *xmalloc ();
  48 char *xrealloc ();
  49 void skip_to_lf ();
  50 void sysfail ();
  51
  52 int
  53 main (argc, argv)
  54      int argc;
  55      char *argv[];
  56 {
  57   char *hd;
  58   char *md;
  59   char *mdd;
  60   char *mfile;
  61   char *cf;
  62   int cflen;
  63   FILE *mddf;
  64   FILE *mfilef;
  65   FILE *cff;
  66   char pre[10];
  67   char name[14];
  68   int c;
  69
  70   hd = (char *) getenv ("HOME");
  71
  72   md = (char *) xmalloc (strlen (hd) + 10);
  73   strcpy (md, hd);
  74   strcat (md, "/Messages");
  75
  76   mdd = (char *) xmalloc (strlen (md) + 11);
  77   strcpy (mdd, md);
  78   strcat (mdd, "/Directory");
  79
  80   cflen = 100;
  81   cf = (char *) xmalloc (cflen);
  82
  83   mddf = fopen (mdd, "r");
  84   if (!mddf)
  85     sysfail (mdd);
  86   if (argc > 1)
  87     mfile = argv[1];
  88   else
  89     {
  90       mfile = (char *) xmalloc (strlen (hd) + 7);
  91       strcpy (mfile, hd);
  92       strcat (mfile, "/OMAIL");
  93     }
  94   mfilef = fopen (mfile, "w");
  95   if (!mfilef)
  96     sysfail (mfile);
  97
  98   skip_to_lf (mddf);
  99   while (fscanf (mddf, "%4c%14[0123456789]", pre, name) != EOF)
 100     {
 101       if (cflen < strlen (md) + strlen (name) + 2)
 102         {
 103           cflen = strlen (md) + strlen (name) + 2;
 104           cf = (char *) xrealloc (cf, cflen);
 105         }
 106       strcpy (cf, md);
 107       strcat (cf,"/");
 108       strcat (cf, name);
 109       cff = fopen (cf, "r");
 110       if (!cff)
 111         perror (cf);
 112       else
 113         {
 114           while ((c = getc(cff)) != EOF)
 115             putc (c, mfilef);
 116           putc ('\n', mfilef);
 117           skip_to_lf (mddf);
 118           fclose (cff);
 119         }
 120     }
 121   fclose (mddf);
 122   fclose (mfilef);
 123   return 0;
 124 }
 125
 126 void
 127 skip_to_lf (stream)
 128      FILE *stream;
 129 {
 130   register int c;
 131   while ((c = getc(stream)) != EOF && c != '\n')
 132     ;
 133 }
 134
 135
 136 void
 137 error (s1, s2)
 138      char *s1, *s2;
 139 {
 140   fprintf (stderr, "cvtmail: ");
 141   fprintf (stderr, s1, s2);
 142   fprintf (stderr, "\n");
 143 }
 144
 145 /* Print error message and exit.  */
 146
 147 void
 148 fatal (s1, s2)
 149      char *s1, *s2;
 150 {
 151   error (s1, s2);
 152   exit (1);
 153 }
 154
 155 void
 156 sysfail (s)
 157      char *s;
 158 {
 159   fprintf (stderr, "cvtmail: ");
 160   perror (s);
 161   exit (1);
 162 }
 163
 164 char *
 165 xmalloc (size)
 166      unsigned size;
 167 {
 168   char *result = malloc (size);
 169   if (!result)
 170     fatal ("virtual memory exhausted", 0);
 171   return result;
 172 }
 173
 174 char *
 175 xrealloc (ptr, size)
 176      char *ptr;
 177      unsigned size;
 178 {
 179   char *result = realloc (ptr, size);
 180   if (!result)
 181     fatal ("virtual memory exhausted");
 182   return result;
 183 }