source: MondoRescue/branches/stable/mindi-busybox/miscutils/setsid.c@ 1562

/* vi: set sw=4 ts=4: */
/*
 * setsid.c -- execute a command in a new session
 * Rick Sladkey <jrs@world.std.com>
 * In the public domain.
 *
 * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
 * - added Native Language Support
 *
 * 2001-01-18 John Fremlin <vii@penguinpowered.com>
 * - fork in case we are process group leader
 *
 * 2004-11-12 Paul Fox
 * - busyboxed
 */

#include "busybox.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

int setsid_main(int argc, char *argv[])
{
    if (argc < 2)
        bb_show_usage();

    if (getpgrp() == getpid()) {
        switch(fork()){
        case -1:
            bb_perror_msg_and_die("fork");
        case 0:
            break;
        default:    /* parent */
            exit(0);
        }
        /* child falls through */
    }

    setsid();  /* no error possible */

    execvp(argv[1], argv + 1);

    bb_perror_msg_and_die("%s", argv[1]);
}