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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 static const char copyright[] =
33 "@(#) Copyright (c) 1988, 1993\n\
34 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)chroot.c 8.1 (Berkeley) 6/9/93";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/types.h>
57 static void usage(void);
59 char *user; /* user to switch to before running program */
60 char *group; /* group to switch to ... */
61 char *grouplist; /* group list to switch to ... */
64 main(int argc, char *argv[])
77 while ((ch = getopt(argc, argv, "G:g:u:")) != -1) {
91 if (*grouplist == '\0')
106 if (isdigit((unsigned char)*group)) {
107 gid = (gid_t)strtoul(group, &endp, 0);
112 if ((gp = getgrnam(group)) != NULL)
115 errx(1, "no such group `%s'", group);
119 ngroups_max = sysconf(_SC_NGROUPS_MAX) + 1;
120 if ((gidlist = malloc(sizeof(gid_t) * ngroups_max)) == NULL)
123 (p = strsep(&grouplist, ",")) != NULL && gids < ngroups_max; ) {
127 if (isdigit((unsigned char)*p)) {
128 gidlist[gids] = (gid_t)strtoul(p, &endp, 0);
133 if ((gp = getgrnam(p)) != NULL)
134 gidlist[gids] = gp->gr_gid;
136 errx(1, "no such group `%s'", p);
140 if (p != NULL && gids == ngroups_max)
141 errx(1, "too many supplementary groups provided");
144 if (isdigit((unsigned char)*user)) {
145 uid = (uid_t)strtoul(user, &endp, 0);
150 if ((pw = getpwnam(user)) != NULL)
153 errx(1, "no such user `%s'", user);
157 if (chdir(argv[0]) == -1 || chroot(".") == -1)
158 err(1, "%s", argv[0]);
160 if (gids && setgroups(gids, gidlist) == -1)
162 if (group && setgid(gid) == -1)
164 if (user && setuid(uid) == -1)
168 execvp(argv[1], &argv[1]);
169 err(1, "%s", argv[1]);
172 if (!(shell = getenv("SHELL")))
173 shell = _PATH_BSHELL;
174 execlp(shell, shell, "-i", (char *)NULL);
182 (void)fprintf(stderr, "usage: chroot [-g group] [-G group,group,...] "
183 "[-u user] newroot [command]\n");