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
  23 int
  24 what_now (char *ed, int nedit, int use, char *file, char *altmsg, int dist,
  25           struct msgs *mp, char *text, int inplace, char *cwd, int atfile)
  26 {
  27     int found, k, msgnum, vecp;
  28     int len, buflen;
  29     register char *bp;
  30     char buffer[BUFSIZ], *vec[MAXARGS];
  31
  32     vecp = 0;
  33     vec[vecp++] = r1bindex (whatnowproc, '/');
  34     vec[vecp] = NULL;
  35
  36     m_putenv ("mhdraft", file);
  37     if (mp)
  38         m_putenv ("mhfolder", mp->foldpath);
  39     else
  40         unputenv ("mhfolder");
  41     if (altmsg) {
  42         if (mp == NULL || *altmsg == '/' || cwd == NULL)
  43             m_putenv ("mhaltmsg", altmsg);
  44         else {
  45             snprintf (buffer, sizeof(buffer), "%s/%s", mp->foldpath, altmsg);
  46             m_putenv ("mhaltmsg", buffer);
  47         }
  48     } else {
  49         unputenv ("mhaltmsg");
  50     }
  51     if ((bp = getenv ("mhaltmsg")))/* XXX */
  52         m_putenv ("editalt", bp);
  53     snprintf (buffer, sizeof(buffer), "%d", dist);
  54     m_putenv ("mhdist", buffer);
  55     if (nedit) {
  56         unputenv ("mheditor");
  57     } else {
  58         m_putenv ("mheditor", ed ? ed : (ed = context_find ("editor"))
  59             ? ed : defaulteditor);
  60     }
  61     snprintf (buffer, sizeof(buffer), "%d", use);
  62     m_putenv ("mhuse", buffer);
  63     snprintf (buffer, sizeof(buffer), "%d", atfile);
  64     m_putenv ("mhatfile", buffer);
  65
  66     unputenv ("mhmessages");
  67     unputenv ("mhannotate");
  68     unputenv ("mhinplace");
  69
  70     if (text && mp && !is_readonly(mp)) {
  71         found = 0;
  72         bp = buffer;
  73         buflen = sizeof(buffer);
  74         for (msgnum = mp->lowmsg; msgnum <= mp->hghmsg; msgnum++) {
  75             if (is_selected(mp, msgnum)) {
  76                 snprintf (bp, buflen, "%s%s", found ? " " : "", m_name (msgnum));
  77                 len = strlen (bp);
  78                 bp += len;
  79                 buflen -= len;
  80                 for (k = msgnum + 1; k <= mp->hghmsg && is_selected(mp, k); k++)
  81                     continue;
  82                 if (--k > msgnum) {
  83                     snprintf (bp, buflen, "-%s", m_name (k));
  84                     len = strlen (bp);
  85                     bp += len;
  86                     buflen -= len;
  87                 }
  88                 msgnum = k + 1;
  89                 found++;
  90             }
  91         }
  92         if (found) {
  93             m_putenv ("mhmessages", buffer);
  94             m_putenv ("mhannotate", text);
  95             snprintf (buffer, sizeof(buffer), "%d", inplace);
  96             m_putenv ("mhinplace", buffer);
  97         }
  98     }
  99
 100     context_save ();    /* save the context file */
 101     fflush (stdout);
 102
 103     if (cwd)
 104         chdir (cwd);
 105
 106     /*
 107      * If the "whatnowproc" is the nmh command "whatnow",
 108      * we run it internally, rather than exec'ing it.
 109      */
 110     if (strcmp (vec[0], "whatnow") == 0) {
 111         WhatNow (vecp, vec);
 112         done (0);
 113     }
 114
 115     execvp (whatnowproc, vec);
 116     fprintf (stderr, "unable to exec ");
 117     perror (whatnowproc);
 118
 119     return 0;
 120 }