source: MondoRescue/branches/stable/mindi-busybox/console-tools/openvt.c@ 821

/* vi: set sw=4 ts=4: */
/*
 *  openvt.c - open a vt to run a command.
 *
 *  busyboxed by Quy Tonthat <quy@signal3.com>
 *  hacked by Tito <farmatito@tiscali.it>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* getopt not needed */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <ctype.h>

#include "busybox.h"

int openvt_main(int argc, char **argv)
{
    int fd;
    char vtname[sizeof(VC_FORMAT) + 2];


    if (argc < 3) {
        bb_show_usage();
    }
    /* check for Illegal vt number: < 1 or > 12 */
    sprintf(vtname, VC_FORMAT, (int)bb_xgetlarg(argv[1], 10, 1, 12));

    if (fork() == 0) {
        /* leave current vt */
        if (setsid() < 0) {
            bb_perror_msg_and_die("setsid");
        }
        close(0);           /* so that new vt becomes stdin */

        /* and grab new one */
        fd = bb_xopen(vtname, O_RDWR);

        /* Reassign stdout and sterr */
        dup2(fd, STDOUT_FILENO);
        dup2(fd, STDERR_FILENO);

        execvp(argv[2], &argv[2]);
        _exit(1);
    }
    return EXIT_SUCCESS;
}