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/geteditor.h"
  10 #include "sbr/context_save.h"
  11 #include "sbr/error.h"
  12 #include "h/done.h"
  13
  14
  15 /*
  16  * This routine is used by comp, repl, forw, and dist to exec
  17  * the "whatnowproc".  It first sets up all the environment
  18  * variables that the "whatnowproc" will need to check, and
  19  * then execs the command.  As an optimization, if the
  20  * "whatnowproc" is the nmh command "whatnow" (typical case),
  21  * it will call this routine directly without exec'ing it.
  22  */
  23
  24
  25 int
  26 what_now (char *ed, int nedit, int use, char *file, char *altmsg, int dist,
  27           struct msgs *mp, char *text, int inplace, char *cwd, int atfile)
  28 {
  29     bool found;
  30     int k, msgnum, vecp;
  31     int len, buflen;
  32     char *bp;
  33     char buffer[BUFSIZ], *vec[MAXARGS];
  34
  35     vecp = 0;
  36     vec[vecp++] = r1bindex (whatnowproc, '/');
  37     vec[vecp] = NULL;
  38
  39     setenv("mhdraft", file, 1);
  40     if (mp)
  41         setenv("mhfolder", mp->foldpath, 1);
  42     else
  43         unsetenv("mhfolder");
  44     if (altmsg) {
  45         if (mp == NULL || *altmsg == '/' || cwd == NULL)
  46             setenv("mhaltmsg", altmsg, 1);
  47         else {
  48             snprintf (buffer, sizeof(buffer), "%s/%s", mp->foldpath, altmsg);
  49             setenv("mhaltmsg", buffer, 1);
  50         }
  51     } else {
  52         unsetenv("mhaltmsg");
  53     }
  54     if ((bp = getenv ("mhaltmsg")))/* XXX */
  55         setenv("editalt", bp, 1);
  56     snprintf (buffer, sizeof(buffer), "%d", dist);
  57     setenv("mhdist", buffer, 1);
  58     if (nedit) {
  59         unsetenv("mheditor");
  60     } else {
  61         if (!ed)
  62             ed = get_default_editor();
  63         setenv("mheditor", ed, 1);
  64     }
  65     snprintf (buffer, sizeof(buffer), "%d", use);
  66     setenv("mhuse", buffer, 1);
  67     snprintf (buffer, sizeof(buffer), "%d", atfile);
  68     setenv("mhatfile", buffer, 1);
  69
  70     unsetenv("mhmessages");
  71     unsetenv("mhannotate");
  72     unsetenv("mhinplace");
  73
  74     if (text && mp && !is_readonly(mp)) {
  75         found = false;
  76         bp = buffer;
  77         buflen = sizeof(buffer);
  78         for (msgnum = mp->lowmsg; msgnum <= mp->hghmsg; msgnum++) {
  79             if (is_selected(mp, msgnum)) {
  80                 snprintf (bp, buflen, "%s%s", found ? " " : "", m_name (msgnum));
  81                 len = strlen (bp);
  82                 bp += len;
  83                 buflen -= len;
  84                 for (k = msgnum + 1; k <= mp->hghmsg && is_selected(mp, k); k++)
  85                     continue;
  86                 if (--k > msgnum) {
  87                     snprintf (bp, buflen, "-%s", m_name (k));
  88                     len = strlen (bp);
  89                     bp += len;
  90                     buflen -= len;
  91                 }
  92                 msgnum = k + 1;
  93                 found = true;
  94             }
  95         }
  96         if (found) {
  97             setenv("mhmessages", buffer, 1);
  98             setenv("mhannotate", text, 1);
  99             snprintf (buffer, sizeof(buffer), "%d", inplace);
 100             setenv("mhinplace", buffer, 1);
 101         }
 102     }
 103
 104     context_save ();    /* save the context file */
 105     fflush (stdout);
 106
 107     if (cwd) {
 108         if (chdir (cwd) < 0) {
 109             advise (cwd, "chdir");
 110         }
 111     }
 112
 113     /*
 114      * If the "whatnowproc" is the nmh command "whatnow",
 115      * we run it internally, rather than exec'ing it.
 116      */
 117     if (strcmp (vec[0], "whatnow") == 0) {
 118         WhatNow (vecp, vec);
 119         done (0);
 120     }
 121
 122     execvp (whatnowproc, vec);
 123     fprintf (stderr, "unable to exec ");
 124     perror (whatnowproc);
 125
 126     return 0;
 127 }