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