jexec.c revision 113277 
1/*-
2 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/usr.sbin/jexec/jexec.c 113277 2003-04-09 03:04:12Z mike $
27 */
28
29#include <sys/param.h>
30#include <sys/jail.h>
31
32#include <err.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <unistd.h>
36
37static void	usage(void);
38
39int
40main(int argc, char *argv[])
41{
42	int jid;
43
44	if (argc < 3)
45		usage();
46	jid = (int)strtol(argv[1], NULL, 10);
47	if (jail_attach(jid) == -1)
48		err(1, "jail_attach(): %d", jid);
49	if (chdir("/") == -1)
50		err(1, "chdir(): /");
51	if (execv(argv[2], argv + 2) == -1)
52		err(1, "execv(): %s", argv[2]);
53	exit(0);
54}
55
56static void
57usage(void)
58{
59
60	fprintf(stderr, "usage: jexec jid command [...]\n");
61	exit(1);
62}
63