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/*-
* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
* Copyright (c) 2008 Bjoern A. Zeeb <bz@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/jail.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define FLAG_A 0x00001
#define FLAG_V 0x00002
#ifdef SUPPORT_OLD_XPRISON
static
char *print_xprison_v1(void *p, char *end, unsigned flags)
{
struct xprison_v1 *xp;
struct in_addr in;
if ((char *)p + sizeof(struct xprison_v1) > end)
errx(1, "Invalid length for jail");
xp = (struct xprison_v1 *)p;
if (flags & FLAG_V) {
printf("%6d %-29.29s %.74s\n",
xp->pr_id, xp->pr_host, xp->pr_path);
/* We are not printing an empty line here for state and name. */
/* We are not printing an empty line here for cpusetid. */
/* IPv4 address. */
in.s_addr = htonl(xp->pr_ip);
printf("%6s %-15.15s\n", "", inet_ntoa(in));
} else {
printf("%6d %-15.15s %-29.29s %.74s\n",
xp->pr_id, inet_ntoa(in), xp->pr_host, xp->pr_path);
}
return ((char *)(xp + 1));
}
#endif
static
char *print_xprison_v3(void *p, char *end, unsigned flags)
{
struct xprison *xp;
struct in_addr *iap, in;
struct in6_addr *ia6p;
char buf[INET6_ADDRSTRLEN];
const char *state;
char *q;
uint32_t i;
if ((char *)p + sizeof(struct xprison) > end)
errx(1, "Invalid length for jail");
xp = (struct xprison *)p;
if (xp->pr_state < 0 || xp->pr_state >= (int)
((sizeof(prison_states) / sizeof(struct prison_state))))
state = "(bogus)";
else
state = prison_states[xp->pr_state].state_name;
/* See if we should print non-ACTIVE jails. No? */
if ((flags & FLAG_A) == 0 && strcmp(state, "ALIVE")) {
q = (char *)(xp + 1);
q += (xp->pr_ip4s * sizeof(struct in_addr));
if (q > end)
errx(1, "Invalid length for jail");
q += (xp->pr_ip6s * sizeof(struct in6_addr));
if (q > end)
errx(1, "Invalid length for jail");
return (q);
}
if (flags & FLAG_V)
printf("%6d %-29.29s %.74s\n",
xp->pr_id, xp->pr_host, xp->pr_path);
/* Jail state and name. */
if (flags & FLAG_V)
printf("%6s %-29.29s %.74s\n",
"", (xp->pr_name[0] != '\0') ? xp->pr_name : "", state);
/* cpusetid. */
if (flags & FLAG_V)
printf("%6s %-6d\n",
"", xp->pr_cpusetid);
q = (char *)(xp + 1);
/* IPv4 addresses. */
iap = (struct in_addr *)(void *)q;
q += (xp->pr_ip4s * sizeof(struct in_addr));
if (q > end)
errx(1, "Invalid length for jail");
in.s_addr = 0;
for (i = 0; i < xp->pr_ip4s; i++) {
if (i == 0 || flags & FLAG_V)
in.s_addr = iap[i].s_addr;
if (flags & FLAG_V)
printf("%6s %-15.15s\n", "", inet_ntoa(in));
}
/* IPv6 addresses. */
ia6p = (struct in6_addr *)(void *)q;
q += (xp->pr_ip6s * sizeof(struct in6_addr));
if (q > end)
errx(1, "Invalid length for jail");
for (i = 0; i < xp->pr_ip6s; i++) {
if (flags & FLAG_V) {
inet_ntop(AF_INET6, &ia6p[i], buf, sizeof(buf));
printf("%6s %s\n", "", buf);
}
}
/* If requested print the old style single line version. */
if (!(flags & FLAG_V))
printf("%6d %-15.15s %-29.29s %.74s\n",
xp->pr_id, (in.s_addr) ? inet_ntoa(in) : "",
xp->pr_host, xp->pr_path);
return (q);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: jls [-av]\n");
exit(1);
}
int
main(int argc, char *argv[])
{
int ch, version;
unsigned flags;
size_t i, j, len;
void *p, *q;
flags = 0;
while ((ch = getopt(argc, argv, "av")) != -1) {
switch (ch) {
case 'a':
flags |= FLAG_A;
break;
case 'v':
flags |= FLAG_V;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (sysctlbyname("security.jail.list", NULL, &len, NULL, 0) == -1)
err(1, "sysctlbyname(): security.jail.list");
j = len;
for (i = 0; i < 4; i++) {
if (len <= 0)
exit(0);
p = q = malloc(len);
if (p == NULL)
err(1, "malloc()");
if (sysctlbyname("security.jail.list", q, &len, NULL, 0) == -1) {
if (errno == ENOMEM) {
free(p);
p = NULL;
len += j;
continue;
}
err(1, "sysctlbyname(): security.jail.list");
}
break;
}
if (p == NULL)
err(1, "sysctlbyname(): security.jail.list");
if (len < sizeof(int))
errx(1, "This is no prison. Kernel and userland out of sync?");
version = *(int *)p;
if (version > XPRISON_VERSION)
errx(1, "Sci-Fi prison. Kernel/userland out of sync?");
if (flags & FLAG_V) {
printf(" JID Hostname Path\n");
printf(" Name State\n");
printf(" CPUSetID\n");
printf(" IP Address(es)\n");
} else {
printf(" JID IP Address Hostname"
" Path\n");
}
for (; q != NULL && (char *)q + sizeof(int) < (char *)p + len;) {
version = *(int *)q;
if (version > XPRISON_VERSION)
errx(1, "Sci-Fi prison. Kernel/userland out of sync?");
switch (version) {
#ifdef SUPPORT_OLD_XPRISON
case 1:
q = print_xprison_v1(q, (char *)p + len, flags);
break;
case 2:
errx(1, "Version 2 was used by multi-IPv4 jail "
"implementations that never made it into the "
"official kernel.");
/* NOTREACHED */
break;
#endif
case 3:
q = print_xprison_v3(q, (char *)p + len, flags);
break;
default:
errx(1, "Prison unknown. Kernel/userland out of sync?");
/* NOTREACHED */
break;
}
}
free(p);
exit(0);
}
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