diplodocus.org Git - nmh/blob - docs/historical/mh-jun-1982/subs/showfile.c

   1 #ifdef COMMENT
   2         Proprietary Rand Corporation, 1981.
   3         Further distribution of this software
   4         subject to the terms of the Rand
   5         license agreement.
   6 #endif
   7
   8 #include "../mh.h"
   9 #include <signal.h>
  10 #include <stdio.h>
  11
  12 showfile(file)
  13 char *file;
  14 {
  15         int pid, wpid, (*intr)(), status;
  16         char *vec[4];
  17
  18         intr = signal(SIGINT, SIG_IGN);
  19         m_update();
  20         VOID fflush(stdout);
  21         if((pid = fork()) == 0) {
  22                 vec[0] = r1bindex(lproc, '/');
  23                 vec[1] = file;
  24                 vec[2] = 0;
  25                 VOID signal(SIGINT, intr);
  26                 execv(lproc, vec);
  27                 fprintf(stderr, "Can't exec ");
  28                 perror(lproc);
  29                 goto badleave;
  30         } else if(pid == -1) {
  31                 fprintf(stderr, "No forks!\n");
  32                 goto badleave;
  33         } else
  34                 while((wpid = wait(&status)) != -1 && wpid != pid) ;
  35         VOID signal(SIGINT, intr);
  36         if(status & 0377)
  37                 goto badleave;
  38         return(0);
  39
  40  badleave:
  41         VOID fflush(stdout);
  42         return(1);
  43
  44 }
  45