blob: f2d9b4d00b4d50103f6fe3d9a76960d9fd5fc06b [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 *
Eric Andersen8ec10a92001-01-27 09:33:39 +00006 * Copyright (C) 1999,2000,2001 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 Andersen2ce1edc1999-10-12 15:42:48 +000025#include <stdlib.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000026#include <stdio.h>
Eric Andersened3ef502001-01-27 08:24:39 +000027#include <unistd.h>
Eric Andersen2ce1edc1999-10-12 15:42:48 +000028#include <errno.h>
Eric Andersencbe31da2001-02-20 06:14:08 +000029#include "busybox.h"
Eric Andersencc8ed391999-10-05 16:24:54 +000030
Eric Andersen2b69c401999-10-05 22:58:32 +000031int chroot_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000032{
Eric Andersen808d03e2000-06-02 17:56:45 +000033 char *prog;
34
Erik Andersene49d5ec2000-02-08 19:58:47 +000035 if ((argc < 2) || (**(argv + 1) == '-')) {
Eric Andersen67991cf2001-02-14 21:23:06 +000036 show_usage();
Erik Andersene49d5ec2000-02-08 19:58:47 +000037 }
38 argc--;
39 argv++;
Eric Andersencc8ed391999-10-05 16:24:54 +000040
Erik Andersene49d5ec2000-02-08 19:58:47 +000041 if (chroot(*argv) || (chdir("/"))) {
Matt Kraai1fa1ade2000-12-18 03:57:16 +000042 perror_msg_and_die("cannot change root directory to %s", *argv);
Erik Andersene49d5ec2000-02-08 19:58:47 +000043 }
Eric Andersen2b69c401999-10-05 22:58:32 +000044
Erik Andersene49d5ec2000-02-08 19:58:47 +000045 argc--;
46 argv++;
47 if (argc >= 1) {
Eric Andersen808d03e2000-06-02 17:56:45 +000048 prog = *argv;
Erik Andersene49d5ec2000-02-08 19:58:47 +000049 execvp(*argv, argv);
50 } else {
Pavel Roskine99f7502000-07-24 20:15:30 +000051#ifndef BB_SH
Erik Andersene49d5ec2000-02-08 19:58:47 +000052 prog = getenv("SHELL");
53 if (!prog)
54 prog = "/bin/sh";
55 execlp(prog, prog, NULL);
Pavel Roskine99f7502000-07-24 20:15:30 +000056#else
Matt Kraaibc0f7832001-05-17 03:54:37 +000057 char shell[] = "/bin/sh";
58 char *shell_argv[2] = { shell, NULL };
Matt Kraai69438152001-05-17 20:40:21 +000059 applet_name = shell;
Matt Kraaibc0f7832001-05-17 03:54:37 +000060 shell_main(1, shell_argv);
Matt Kraai3e856ce2000-12-01 02:55:13 +000061 return EXIT_SUCCESS;
Pavel Roskine99f7502000-07-24 20:15:30 +000062#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +000063 }
Matt Kraai1fa1ade2000-12-18 03:57:16 +000064 perror_msg_and_die("cannot execute %s", prog);
Eric Andersen808d03e2000-06-02 17:56:45 +000065
Eric Andersencc8ed391999-10-05 16:24:54 +000066}
Erik Andersen029011b2000-03-04 21:19:32 +000067
68
69/*
70Local Variables:
71c-file-style: "linux"
72c-basic-offset: 4
73tab-width: 4
74End:
75*/