blob: 91d3407f2a37f6a5ee7e0470d68880af3be667da [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersen2b69c401999-10-05 22:58:32 +00002/*
3 * Mini chroot implementation for busybox
4 *
Eric Andersenc4996011999-10-20 22:08:37 +00005 *
Erik Andersen61677fe2000-04-13 01:18:56 +00006 * Copyright (C) 1999,2000 by Lineo, inc.
Eric Andersenc4996011999-10-20 22:08:37 +00007 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
Eric Andersen2b69c401999-10-05 22:58:32 +00008 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
Eric Andersen3570a342000-09-25 21:45:58 +000025#include "busybox.h"
Eric Andersen2ce1edc1999-10-12 15:42:48 +000026#include <stdlib.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000027#include <stdio.h>
Eric Andersen2ce1edc1999-10-12 15:42:48 +000028#include <errno.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000029
Eric Andersen2b69c401999-10-05 22:58:32 +000030int chroot_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000031{
Eric Andersen808d03e2000-06-02 17:56:45 +000032 char *prog;
33
Erik Andersene49d5ec2000-02-08 19:58:47 +000034 if ((argc < 2) || (**(argv + 1) == '-')) {
35 usage(chroot_usage);
36 }
37 argc--;
38 argv++;
Eric Andersencc8ed391999-10-05 16:24:54 +000039
Erik Andersene49d5ec2000-02-08 19:58:47 +000040 if (chroot(*argv) || (chdir("/"))) {
Matt Kraai1fa1ade2000-12-18 03:57:16 +000041 perror_msg_and_die("cannot change root directory to %s", *argv);
Erik Andersene49d5ec2000-02-08 19:58:47 +000042 }
Eric Andersen2b69c401999-10-05 22:58:32 +000043
Erik Andersene49d5ec2000-02-08 19:58:47 +000044 argc--;
45 argv++;
46 if (argc >= 1) {
Eric Andersen808d03e2000-06-02 17:56:45 +000047 prog = *argv;
Erik Andersene49d5ec2000-02-08 19:58:47 +000048 execvp(*argv, argv);
49 } else {
Pavel Roskine99f7502000-07-24 20:15:30 +000050#ifndef BB_SH
Erik Andersene49d5ec2000-02-08 19:58:47 +000051 prog = getenv("SHELL");
52 if (!prog)
53 prog = "/bin/sh";
54 execlp(prog, prog, NULL);
Pavel Roskine99f7502000-07-24 20:15:30 +000055#else
56 shell_main(argc, argv);
Matt Kraai3e856ce2000-12-01 02:55:13 +000057 return EXIT_SUCCESS;
Pavel Roskine99f7502000-07-24 20:15:30 +000058#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +000059 }
Matt Kraai1fa1ade2000-12-18 03:57:16 +000060 perror_msg_and_die("cannot execute %s", prog);
Eric Andersen808d03e2000-06-02 17:56:45 +000061
Eric Andersencc8ed391999-10-05 16:24:54 +000062}
Erik Andersen029011b2000-03-04 21:19:32 +000063
64
65/*
66Local Variables:
67c-file-style: "linux"
68c-basic-offset: 4
69tab-width: 4
70End:
71*/