diplodocus.org Git - nmh/blob - uip/whatnowproc.c

   1
   2 /*
   3  * whatnowproc.c -- exec the "whatnowproc"
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11
  12
  13 /*
  14  * This routine is used by comp, repl, forw, and dist to exec
  15  * the "whatnowproc".  It first sets up all the environment
  16  * variables that the "whatnowproc" will need to check, and
  17  * then execs the command.  As an optimization, if the
  18  * "whatnowproc" is the nmh command "whatnow" (typical case),
  19  * it will call this routine directly without exec'ing it.
  20  */
  21
  22 /* from whatnowsbr.c */
  23 int WhatNow (int, char **);
  24
  25
  26 int
  27 what_now (char *ed, int nedit, int use, char *file, char *altmsg, int dist,
  28           struct msgs *mp, char *text, int inplace, char *cwd)
  29 {
  30     int found, k, msgnum, vecp;
  31     int len, buflen;
  32     register char *bp;
  33     char buffer[BUFSIZ], *vec[MAXARGS];
  34
  35     vecp = 0;
  36     vec[vecp++] = r1bindex (whatnowproc, '/');
  37     vec[vecp] = NULL;
  38
  39     m_putenv ("mhdraft", file);
  40     if (mp)
  41         m_putenv ("mhfolder", mp->foldpath);
  42     else
  43         unputenv ("mhfolder");
  44     if (altmsg) {
  45         if (mp == NULL || *altmsg == '/' || cwd == NULL)
  46             m_putenv ("mhaltmsg", altmsg);
  47         else {
  48             snprintf (buffer, sizeof(buffer), "%s/%s", mp->foldpath, altmsg);
  49             m_putenv ("mhaltmsg", buffer);
  50         }
  51     } else {
  52         unputenv ("mhaltmsg");
  53     }
  54     if ((bp = getenv ("mhaltmsg")))/* XXX */
  55         m_putenv ("editalt", bp);
  56     snprintf (buffer, sizeof(buffer), "%d", dist);
  57     m_putenv ("mhdist", buffer);
  58     if (nedit) {
  59         unputenv ("mheditor");
  60     } else {
  61         m_putenv ("mheditor", ed ? ed : (ed = context_find ("editor"))
  62             ? ed : defaulteditor);
  63     }
  64     snprintf (buffer, sizeof(buffer), "%d", use);
  65     m_putenv ("mhuse", buffer);
  66
  67     unputenv ("mhmessages");
  68     unputenv ("mhannotate");
  69     unputenv ("mhinplace");
  70
  71     if (text && mp && !is_readonly(mp)) {
  72         found = 0;
  73         bp = buffer;
  74         buflen = sizeof(buffer);
  75         for (msgnum = mp->lowmsg; msgnum <= mp->hghmsg; msgnum++) {
  76             if (is_selected(mp, msgnum)) {
  77                 snprintf (bp, buflen, "%s%s", found ? " " : "", m_name (msgnum));
  78                 len = strlen (bp);
  79                 bp += len;
  80                 buflen -= len;
  81                 for (k = msgnum + 1; k <= mp->hghmsg && is_selected(mp, k); k++)
  82                     continue;
  83                 if (--k > msgnum) {
  84                     snprintf (bp, buflen, "-%s", m_name (k));
  85                     len = strlen (bp);
  86                     bp += len;
  87                     buflen -= len;
  88                 }
  89                 msgnum = k + 1;
  90                 found++;
  91             }
  92         }
  93         if (found) {
  94             m_putenv ("mhmessages", buffer);
  95             m_putenv ("mhannotate", text);
  96             snprintf (buffer, sizeof(buffer), "%d", inplace);
  97             m_putenv ("mhinplace", buffer);
  98         }
  99     }
 100
 101     context_save ();    /* save the context file */
 102     fflush (stdout);
 103
 104     if (cwd)
 105         chdir (cwd);
 106
 107     /*
 108      * If the "whatnowproc" is the nmh command "whatnow",
 109      * we run it internally, rather than exec'ing it.
 110      */
 111     if (strcmp (vec[0], "whatnow") == 0) {
 112         WhatNow (vecp, vec);
 113         done (0);
 114     }
 115
 116     execvp (whatnowproc, vec);
 117     fprintf (stderr, "unable to exec ");
 118     perror (whatnowproc);
 119
 120     return 0;
 121 }