source: MondoRescue/branches/stable/mindi-busybox/coreutils/chroot.c@ 821

/* vi: set sw=4 ts=4: */
/*
 * Mini chroot implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */

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

int chroot_main(int argc, char **argv)
{
    if (argc < 2) {
        bb_show_usage();
    }

    ++argv;
    if (chroot(*argv)) {
        bb_perror_msg_and_die("cannot change root directory to %s", *argv);
    }
    bb_xchdir("/");

    ++argv;
    if (argc == 2) {
        argv -= 2;
        if (!(*argv = getenv("SHELL"))) {
            *argv = (char *) DEFAULT_SHELL;
        }
        argv[1] = (char *) "-i";
    }

    execvp(*argv, argv);
    bb_perror_msg_and_die("cannot execute %s", *argv);
}