2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1988, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)chroot.c 8.1 (Berkeley) 6/9/93
35 * $FreeBSD: src/usr.sbin/chroot/chroot.c,v 1.4.2.1 2002/03/15 22:54:59 mikeh Exp $
36 * $DragonFly: src/usr.sbin/chroot/chroot.c,v 1.5 2003/11/15 23:33:35 eirikn Exp $
39 #include <sys/types.h>
52 static void usage(void);
54 char *user; /* user to switch to before running program */
55 char *group; /* group to switch to ... */
56 char *grouplist; /* group list to switch to ... */
59 main(int argc, char **argv)
65 gid_t gid, gidlist[NGROUPS_MAX];
71 while ((ch = getopt(argc, argv, "G:g:u:")) != -1) {
85 if (*grouplist == '\0')
100 if (isdigit((unsigned char)*group)) {
101 gid = (gid_t)strtoul(group, &endp, 0);
106 if ((gp = getgrnam(group)) != NULL)
109 errx(1, "no such group `%s'", group);
114 (p = strsep(&grouplist, ",")) != NULL && gids < NGROUPS_MAX; ) {
118 if (isdigit((unsigned char)*p)) {
119 gidlist[gids] = (gid_t)strtoul(p, &endp, 0);
124 if ((gp = getgrnam(p)) != NULL)
125 gidlist[gids] = gp->gr_gid;
127 errx(1, "no such group `%s'", p);
131 if (p != NULL && gids == NGROUPS_MAX)
132 errx(1, "too many supplementary groups provided");
135 if (isdigit((unsigned char)*user)) {
136 uid = (uid_t)strtoul(user, &endp, 0);
141 if ((pw = getpwnam(user)) != NULL)
144 errx(1, "no such user `%s'", user);
148 if (chdir(argv[0]) == -1 || chroot(".") == -1)
149 err(1, "%s", argv[0]);
151 if (gids && setgroups(gids, gidlist) == -1)
153 if (group && setgid(gid) == -1)
155 if (user && setuid(uid) == -1)
159 execvp(argv[1], &argv[1]);
160 err(1, "%s", argv[1]);
163 if (!(shell = getenv("SHELL")))
164 shell = _PATH_BSHELL;
165 execlp(shell, shell, "-i", (char *)NULL);
173 (void)fprintf(stderr, "usage: chroot [-g group] [-G group,group,...] "
174 "[-u user] newroot [command]\n");