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 #include "sbr/error.h"
  10 #include "h/done.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     bool found;
  28     int k, msgnum, vecp;
  29     int len, buflen;
  30     char *bp;
  31     char buffer[BUFSIZ], *vec[MAXARGS];
  32
  33     vecp = 0;
  34     vec[vecp++] = r1bindex (whatnowproc, '/');
  35     vec[vecp] = NULL;
  36
  37     setenv("mhdraft", file, 1);
  38     if (mp)
  39         setenv("mhfolder", mp->foldpath, 1);
  40     else
  41         unsetenv("mhfolder");
  42     if (altmsg) {
  43         if (mp == NULL || *altmsg == '/' || cwd == NULL)
  44             setenv("mhaltmsg", altmsg, 1);
  45         else {
  46             snprintf (buffer, sizeof(buffer), "%s/%s", mp->foldpath, altmsg);
  47             setenv("mhaltmsg", buffer, 1);
  48         }
  49     } else {
  50         unsetenv("mhaltmsg");
  51     }
  52     if ((bp = getenv ("mhaltmsg")))/* XXX */
  53         setenv("editalt", bp, 1);
  54     snprintf (buffer, sizeof(buffer), "%d", dist);
  55     setenv("mhdist", buffer, 1);
  56     if (nedit) {
  57         unsetenv("mheditor");
  58     } else {
  59         if (!ed)
  60             ed = get_default_editor();
  61         setenv("mheditor", ed, 1);
  62     }
  63     snprintf (buffer, sizeof(buffer), "%d", use);
  64     setenv("mhuse", buffer, 1);
  65     snprintf (buffer, sizeof(buffer), "%d", atfile);
  66     setenv("mhatfile", buffer, 1);
  67
  68     unsetenv("mhmessages");
  69     unsetenv("mhannotate");
  70     unsetenv("mhinplace");
  71
  72     if (text && mp && !is_readonly(mp)) {
  73         found = false;
  74         bp = buffer;
  75         buflen = sizeof(buffer);
  76         for (msgnum = mp->lowmsg; msgnum <= mp->hghmsg; msgnum++) {
  77             if (is_selected(mp, msgnum)) {
  78                 snprintf (bp, buflen, "%s%s", found ? " " : "", m_name (msgnum));
  79                 len = strlen (bp);
  80                 bp += len;
  81                 buflen -= len;
  82                 for (k = msgnum + 1; k <= mp->hghmsg && is_selected(mp, k); k++)
  83                     continue;
  84                 if (--k > msgnum) {
  85                     snprintf (bp, buflen, "-%s", m_name (k));
  86                     len = strlen (bp);
  87                     bp += len;
  88                     buflen -= len;
  89                 }
  90                 msgnum = k + 1;
  91                 found = true;
  92             }
  93         }
  94         if (found) {
  95             setenv("mhmessages", buffer, 1);
  96             setenv("mhannotate", text, 1);
  97             snprintf (buffer, sizeof(buffer), "%d", inplace);
  98             setenv("mhinplace", buffer, 1);
  99         }
 100     }
 101
 102     context_save ();    /* save the context file */
 103     fflush (stdout);
 104
 105     if (cwd) {
 106         if (chdir (cwd) < 0) {
 107             advise (cwd, "chdir");
 108         }
 109     }
 110
 111     /*
 112      * If the "whatnowproc" is the nmh command "whatnow",
 113      * we run it internally, rather than exec'ing it.
 114      */
 115     if (strcmp (vec[0], "whatnow") == 0) {
 116         WhatNow (vecp, vec);
 117         done (0);
 118     }
 119
 120     execvp (whatnowproc, vec);
 121     fprintf (stderr, "unable to exec ");
 122     perror (whatnowproc);
 123
 124     return 0;
 125 }