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

   1 /* whatnowproc.c -- exec the "whatnowproc"
   2  *
   3  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include <h/mh.h>
   9
  10
  11 /*
  12  * This routine is used by comp, repl, forw, and dist to exec
  13  * the "whatnowproc".  It first sets up all the environment
  14  * variables that the "whatnowproc" will need to check, and
  15  * then execs the command.  As an optimization, if the
  16  * "whatnowproc" is the nmh command "whatnow" (typical case),
  17  * it will call this routine directly without exec'ing it.
  18  */
  19
  20
  21 int
  22 what_now (char *ed, int nedit, int use, char *file, char *altmsg, int dist,
  23           struct msgs *mp, char *text, int inplace, char *cwd, int atfile)
  24 {
  25     int found, k, msgnum, vecp;
  26     int len, buflen;
  27     char *bp;
  28     char buffer[BUFSIZ], *vec[MAXARGS];
  29
  30     vecp = 0;
  31     vec[vecp++] = r1bindex (whatnowproc, '/');
  32     vec[vecp] = NULL;
  33
  34     setenv("mhdraft", file, 1);
  35     if (mp)
  36         setenv("mhfolder", mp->foldpath, 1);
  37     else
  38         unsetenv("mhfolder");
  39     if (altmsg) {
  40         if (mp == NULL || *altmsg == '/' || cwd == NULL)
  41             setenv("mhaltmsg", altmsg, 1);
  42         else {
  43             snprintf (buffer, sizeof(buffer), "%s/%s", mp->foldpath, altmsg);
  44             setenv("mhaltmsg", buffer, 1);
  45         }
  46     } else {
  47         unsetenv("mhaltmsg");
  48     }
  49     if ((bp = getenv ("mhaltmsg")))/* XXX */
  50         setenv("editalt", bp, 1);
  51     snprintf (buffer, sizeof(buffer), "%d", dist);
  52     setenv("mhdist", buffer, 1);
  53     if (nedit) {
  54         unsetenv("mheditor");
  55     } else {
  56         if (!ed)
  57             ed = get_default_editor();
  58         setenv("mheditor", ed, 1);
  59     }
  60     snprintf (buffer, sizeof(buffer), "%d", use);
  61     setenv("mhuse", buffer, 1);
  62     snprintf (buffer, sizeof(buffer), "%d", atfile);
  63     setenv("mhatfile", buffer, 1);
  64
  65     unsetenv("mhmessages");
  66     unsetenv("mhannotate");
  67     unsetenv("mhinplace");
  68
  69     if (text && mp && !is_readonly(mp)) {
  70         found = 0;
  71         bp = buffer;
  72         buflen = sizeof(buffer);
  73         for (msgnum = mp->lowmsg; msgnum <= mp->hghmsg; msgnum++) {
  74             if (is_selected(mp, msgnum)) {
  75                 snprintf (bp, buflen, "%s%s", found ? " " : "", m_name (msgnum));
  76                 len = strlen (bp);
  77                 bp += len;
  78                 buflen -= len;
  79                 for (k = msgnum + 1; k <= mp->hghmsg && is_selected(mp, k); k++)
  80                     continue;
  81                 if (--k > msgnum) {
  82                     snprintf (bp, buflen, "-%s", m_name (k));
  83                     len = strlen (bp);
  84                     bp += len;
  85                     buflen -= len;
  86                 }
  87                 msgnum = k + 1;
  88                 found++;
  89             }
  90         }
  91         if (found) {
  92             setenv("mhmessages", buffer, 1);
  93             setenv("mhannotate", text, 1);
  94             snprintf (buffer, sizeof(buffer), "%d", inplace);
  95             setenv("mhinplace", buffer, 1);
  96         }
  97     }
  98
  99     context_save ();    /* save the context file */
 100     fflush (stdout);
 101
 102     if (cwd) {
 103         if (chdir (cwd) < 0) {
 104             advise (cwd, "chdir");
 105         }
 106     }
 107
 108     /*
 109      * If the "whatnowproc" is the nmh command "whatnow",
 110      * we run it internally, rather than exec'ing it.
 111      */
 112     if (strcmp (vec[0], "whatnow") == 0) {
 113         WhatNow (vecp, vec);
 114         done (0);
 115     }
 116
 117     execvp (whatnowproc, vec);
 118     fprintf (stderr, "unable to exec ");
 119     perror (whatnowproc);
 120
 121     return 0;
 122 }