xref: /titanic_51/usr/src/cmd/chroot/chroot.c (revision 791a814c934fcd4deb13b26c1f116ff283272a0d)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
27 /*	  All Rights Reserved  	*/
28 
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.8	*/
31 
32 #include <stdio.h>
33 #include <string.h>
34 #include <errno.h>
35 #include <unistd.h>
36 #include <stdlib.h>
37 
38 int
39 main(int argc, char **argv)
40 {
41 	if (argc < 3) {
42 		(void) fprintf(stderr,
43 		    "usage: chroot rootdir command [arg ...]\n");
44 		exit(1);
45 	}
46 
47 	if (chroot(argv[1]) != 0) {
48 		(void) fprintf(stderr, "chroot(\"%s\"): %s\n", argv[1],
49 		    strerror(errno));
50 		exit(1);
51 	}
52 
53 	if (chdir("/") != 0) {
54 		(void) fprintf(stderr, "Can't chdir to new root\n");
55 		exit(1);
56 	}
57 
58 	(void) execv(argv[2], &argv[2]);
59 	perror("chroot: exec failed");
60 	return (1);
61 }
62