takeover-console.c

   1 /*
   2  * This file and its contents are supplied under the terms of the
   3  * Common Development and Distribution License ("CDDL"), version 1.0.
   4  * You may only use this file in accordance with the terms of version
   5  * 1.0 of the CDDL.
   6  *
   7  * A full copy of the text of the CDDL should have accompanied this
   8  * source.  A copy of the CDDL is also available via the Internet at
   9  * http://www.illumos.org/license/CDDL.
  10  */
  11
  12 /*
  13  * Copyright 2017 OmniTI Computer Consulting, Inc. All rights reserved.
  14  */
  15
  16 #include <fcntl.h>
  17 #include <unistd.h>
  18
  19 int
  20 main(int argc, char *argv[])
  21 {
  22         /* Wrest control of /dev/console, and exec the commands after 0, 0. */
  23         int fd;
  24
  25         (void) setpgrp();
  26         (void) close(0);
  27         (void) close(1);
  28         (void) close(2);
  29         fd = open("/dev/console", O_RDWR, 0);
  30         if (fd == 0) {
  31                 (void) fcntl(0, F_DUP2FD, 1);
  32                 (void) fcntl(0, F_DUP2FD, 2);
  33         }
  34         execv(argv[1], &(argv[2]));
  35 }