jls.c revision 149276 
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/jls/jls.c 149276 2005-08-19 11:03:49Z pjd $
27 */
28
29#include <sys/param.h>
30#include <sys/jail.h>
31#include <sys/sysctl.h>
32
33#include <arpa/inet.h>
34#include <err.h>
35#include <errno.h>
36#include <limits.h>
37#include <stdio.h>
38#include <stdlib.h>
39
40
41int
42main(void)
43{
44	struct xprison *sxp, *xp;
45	struct in_addr in;
46	size_t i, len;
47
48	if (sysctlbyname("security.jail.list", NULL, &len, NULL, 0) == -1)
49		err(1, "sysctlbyname(): security.jail.list");
50
51	for (i = 0; i < 4; i++) {
52		if (len <= 0)
53			exit(0);
54		sxp = xp = malloc(len);
55		if (sxp == NULL)
56			err(1, "malloc()");
57
58		if (sysctlbyname("security.jail.list", xp, &len, NULL, 0) == -1) {
59			if (errno == ENOMEM) {
60				free(sxp);
61				sxp = NULL;
62				continue;
63			}
64			err(1, "sysctlbyname(): security.jail.list");
65		}
66		break;
67	}
68	if (sxp == NULL)
69		err(1, "sysctlbyname(): security.jail.list");
70	if (len < sizeof(*xp) || len % sizeof(*xp) ||
71	    xp->pr_version != XPRISON_VERSION)
72		errx(1, "Kernel and userland out of sync");
73
74	printf("   JID  IP Address      Hostname                      Path\n");
75	for (i = 0; i < len / sizeof(*xp); i++) {
76		in.s_addr = ntohl(xp->pr_ip);
77		printf("%6d  %-15.15s %-29.29s %.74s\n",
78		    xp->pr_id, inet_ntoa(in), xp->pr_host, xp->pr_path);
79		xp++;
80	}
81	free(sxp);
82	exit(0);
83}
84