diplodocus.org Git - nmh/blob - sbr/showfile.c

   1
   2 /*
   3  * showfile.c -- invoke the `lproc' command
   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 int
  14 showfile (char **arg, char *file)
  15 {
  16     pid_t pid;
  17     int isdraft, vecp;
  18     char **vec, *program;
  19     int retval = 1;
  20
  21     context_save();     /* save the context file */
  22     fflush(stdout);
  23
  24     /*
  25      * If you have your lproc listed as "mhl",
  26      * then really invoked the mhlproc instead
  27      * (which is usually mhl anyway).
  28      */
  29     if (!strcmp (r1bindex (lproc, '/'), "mhl"))
  30         lproc = mhlproc;
  31
  32     switch (pid = fork()) {
  33     case -1:
  34         /* fork error */
  35         advise ("fork", "unable to");
  36         break;
  37
  38     case 0:
  39         /* child */
  40         vec = argsplit(lproc, &program, &vecp);
  41         isdraft = 1;
  42         if (arg) {
  43             while (*arg) {
  44                 if (**arg != '-')
  45                     isdraft = 0;
  46                 vec[vecp++] = *arg++;
  47             }
  48         }
  49         if (isdraft) {
  50             if (!strcmp (vec[0], "show"))
  51                 vec[vecp++] = "-file";
  52             vec[vecp++] = file;
  53         }
  54         vec[vecp] = NULL;
  55
  56         execvp (program, vec);
  57         fprintf (stderr, "unable to exec ");
  58         perror (lproc);
  59         _exit (-1);
  60
  61     default:
  62         /* parent */
  63         retval = pidwait (pid, -1) & 0377 ? 1 : 0;
  64     }
  65
  66     return retval;
  67 }