blindtty.c

   1 /*
   2  * blindtty - run command in a detached terminal
   3  *
   4  * Usage: blindtty CMD [ARGS]...
   5  *
   6  * You might find it useful to run it as "setsid blindtty CMD...".
   7  *
   8  * Copyright (c) 2006  Petr Baudis, Jan Sembera
   9  */
  10
  11 #include <pty.h>
  12 #include <signal.h>
  13 #include <stdio.h>
  14 #include <sys/types.h>
  15 #include <unistd.h>
  16
  17
  18 void
  19 sigchld(int s)
  20 {
  21         _exit(0);
  22 }
  23
  24 int
  25 main(int argc, char *argv[])
  26 {
  27         int ptm;
  28         pid_t pid;
  29
  30         if (argc < 2) {
  31                 fprintf(stderr, "Usage: blindtty CMD [ARG]...\n");
  32                 return 1;
  33         }
  34
  35         pid = forkpty(&ptm, NULL, NULL, NULL);
  36         if (!pid) {
  37                 int i; for (i=0; i<argc; i++) argv[i] = argv[i+1]; argv[i]=NULL;
  38                 execvp(argv[0], argv);
  39                 perror("execvp() failed");
  40                 return 2;
  41         }
  42
  43         printf("%s started with pid %d\n", argv[1], pid);
  44
  45         signal(SIGCHLD, sigchld);
  46
  47         while (1) {
  48                 char buf[1024];
  49                 if (read(ptm, buf, 1024) <= 0)
  50                         _exit(0);
  51         }
  52
  53         return 0;
  54 }