2 * Copyright (c) 1999 Poul-Henning Kamp.
3 * Copyright (c) 2009-2012 James Gritton
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <sys/sysctl.h>
36 #include <arpa/inet.h>
37 #include <netinet/in.h>
49 #define JP_RDTUN(jp) (((jp)->jp_ctltype & CTLFLAG_RDTUN) == CTLFLAG_RDTUN)
62 static void clear_persist(struct cfjail *j);
63 static int update_jail(struct cfjail *j);
64 static int rdtun_params(struct cfjail *j, int dofail);
65 static void running_jid(struct cfjail *j, int dflag);
66 static void jail_quoted_warnx(const struct cfjail *j, const char *name_msg,
67 const char *noname_msg);
68 static int jailparam_set_note(const struct cfjail *j, struct jailparam *jp,
69 unsigned njp, int flags);
70 static void print_jail(FILE *fp, struct cfjail *j, int oldcl);
71 static void print_param(FILE *fp, const struct cfparam *p, int sep, int doname);
72 static void quoted_print(FILE *fp, char *str);
73 static void usage(void);
75 static struct permspec perm_sysctl[] = {
76 { "security.jail.set_hostname_allowed", KP_ALLOW_SET_HOSTNAME, 0 },
77 { "security.jail.sysvipc_allowed", KP_ALLOW_SYSVIPC, 0 },
78 { "security.jail.allow_raw_sockets", KP_ALLOW_RAW_SOCKETS, 0 },
79 { "security.jail.chflags_allowed", KP_ALLOW_CHFLAGS, 0 },
80 { "security.jail.mount_allowed", KP_ALLOW_MOUNT, 0 },
81 { "security.jail.socket_unixiproute_only", KP_ALLOW_SOCKET_AF, 1 },
84 static const enum intparam startcommands[] = {
106 static const enum intparam stopcommands[] = {
116 IP__MOUNT_FROM_FSTAB,
128 main(int argc, char **argv)
136 int ch, docf, error, i, oldcl, sysval;
138 char enforce_statfs[4];
139 #if defined(INET) || defined(INET6)
142 #if defined(INET) && defined(INET6)
143 struct in6_addr addr6;
152 while ((ch = getopt(argc, argv, "cdf:hiJ:lmn:p:qrRs:u:U:v")) != -1) {
164 #if defined(INET) || defined(INET6)
165 add_param(NULL, NULL, IP_IP_HOSTNAME, NULL);
177 add_param(NULL, NULL, IP_EXEC_CLEAN, NULL);
184 add_param(NULL, NULL, KP_NAME, optarg);
188 paralimit = strtol(optarg, NULL, 10);
203 add_param(NULL, NULL, KP_SECURELEVEL, optarg);
207 add_param(NULL, NULL, IP_EXEC_JAIL_USER, optarg);
208 add_param(NULL, NULL, IP_EXEC_SYSTEM_JAIL_USER, NULL);
212 add_param(NULL, NULL, IP_EXEC_JAIL_USER, optarg);
213 add_param(NULL, NULL, IP_EXEC_SYSTEM_JAIL_USER,
227 /* Find out which of the four command line styles this is. */
230 /* Old-style command line with four fixed parameters */
231 if (argc < 4 || argv[0][0] != '/')
236 add_param(NULL, NULL, KP_PATH, argv[0]);
237 add_param(NULL, NULL, KP_HOST_HOSTNAME, argv[1]);
238 #if defined(INET) || defined(INET6)
239 if (argv[2][0] != '\0') {
240 for (cs = argv[2];; cs = ncs + 1) {
241 ncs = strchr(cs, ',');
244 add_param(NULL, NULL,
245 #if defined(INET) && defined(INET6)
246 inet_pton(AF_INET6, cs, &addr6) == 1
247 ? KP_IP6_ADDR : KP_IP4_ADDR,
259 for (i = 3; i < argc; i++)
260 add_param(NULL, NULL, IP_COMMAND, argv[i]);
261 /* Emulate the defaults from security.jail.* sysctls. */
262 sysvallen = sizeof(sysval);
263 if (sysctlbyname("security.jail.jailed", &sysval, &sysvallen,
264 NULL, 0) == 0 && sysval == 0) {
265 for (pi = 0; pi < sizeof(perm_sysctl) /
266 sizeof(perm_sysctl[0]); pi++) {
267 sysvallen = sizeof(sysval);
268 if (sysctlbyname(perm_sysctl[pi].name,
269 &sysval, &sysvallen, NULL, 0) == 0)
270 add_param(NULL, NULL,
271 perm_sysctl[pi].ipnum,
276 sysvallen = sizeof(sysval);
277 if (sysctlbyname("security.jail.enforce_statfs",
278 &sysval, &sysvallen, NULL, 0) == 0) {
279 snprintf(enforce_statfs,
280 sizeof(enforce_statfs), "%d", sysval);
281 add_param(NULL, NULL, KP_ENFORCE_STATFS,
285 } else if (op == JF_STOP) {
286 /* Jail remove, perhaps using the config file */
287 if (!docf || argc == 0)
290 for (i = 0; i < argc; i++)
291 if (strchr(argv[i], '='))
293 if ((docf = !Rflag &&
294 (!strcmp(cfname, "-") || stat(cfname, &st) == 0)))
296 note_remove = docf || argc > 1 || wild_jail_name(argv[0]);
297 } else if (argc > 1 || (argc == 1 && strchr(argv[0], '='))) {
298 /* Single jail specified on the command line */
302 for (i = 0; i < argc; i++) {
303 if (!strncmp(argv[i], "command", 7) &&
304 (argv[i][7] == '\0' || argv[i][7] == '=')) {
305 if (argv[i][7] == '=')
306 add_param(NULL, NULL, IP_COMMAND,
308 for (i++; i < argc; i++)
309 add_param(NULL, NULL, IP_COMMAND,
313 else if (!strncmp(argv[i], "ip4.addr=", 9)) {
314 for (cs = argv[i] + 9;; cs = ncs + 1) {
315 ncs = strchr(cs, ',');
318 add_param(NULL, NULL, KP_IP4_ADDR, cs);
325 else if (!strncmp(argv[i], "ip6.addr=", 9)) {
326 for (cs = argv[i] + 9;; cs = ncs + 1) {
327 ncs = strchr(cs, ',');
330 add_param(NULL, NULL, KP_IP6_ADDR, cs);
337 add_param(NULL, NULL, 0, argv[i]);
340 /* From the config file, perhaps with a specified jail */
346 /* Find out which jails will be run. */
350 for (i = 0; i < argc; i++)
351 if (start_state(argv[i], docf, op, Rflag) < 0)
354 if (start_state(argv[0], docf, op, 0) < 0)
359 if (JidFile != NULL) {
360 jfp = fopen(JidFile, "w");
362 err(1, "open %s", JidFile);
368 * The main loop: Get an available jail and perform the required
369 * operation on it. When that is done, the jail may be finished,
370 * or it may go back for the next step.
372 while ((j = next_jail()))
374 if (j->flags & JF_FAILED) {
376 if (j->comparam == NULL) {
381 if (!(j->flags & JF_PARAMS))
383 j->flags |= JF_PARAMS;
385 add_param(j, NULL, IP_ALLOW_DYING, NULL);
386 if (check_intparams(j) < 0)
388 if ((j->flags & (JF_START | JF_SET)) &&
389 import_params(j) < 0)
394 (j->flags & (JF_SET | JF_DEPEND)) == JF_SET
395 ? dflag || bool_param(j->intparams[IP_ALLOW_DYING])
397 if (finish_command(j))
400 switch (j->flags & JF_OP_MASK) {
402 * These operations just turn into a different op
403 * depending on the jail's current status.
406 j->flags = j->jid < 0 ? JF_START : JF_SET;
410 jail_quoted_warnx(j, "not found",
411 "no jail specified");
415 j->flags = rdtun_params(j, 0) ? JF_RESTART : JF_SET;
416 if (j->flags == JF_RESTART)
419 case JF_START_SET_RESTART:
420 j->flags = j->jid < 0 ? JF_START
421 : rdtun_params(j, 0) ? JF_RESTART : JF_SET;
422 if (j->flags == JF_RESTART)
426 switch (j->flags & JF_OP_MASK) {
428 if (j->comparam == NULL) {
430 !(j->flags & (JF_DEPEND | JF_WILD))) {
431 jail_quoted_warnx(j, "already exists",
439 goto jail_create_done;
440 j->comparam = startcommands;
448 print_jail(jfp, j, oldcl);
453 if (j->jid < 0 && !(j->flags & JF_DEPEND)) {
454 jail_quoted_warnx(j, "not found",
455 "no jail specified");
461 if (!(j->flags & JF_DEPEND)) {
462 if (rdtun_params(j, 1) < 0 ||
465 if (verbose >= 0 && (j->name || verbose > 0))
466 jail_note(j, "updated\n");
473 if (j->comparam == NULL) {
477 if (!(j->flags & (JF_DEPEND|JF_WILD))) {
483 goto jail_remove_done;
485 j->comparam = stopcommands;
487 } else if ((j->flags & JF_FAILED) && j->jid > 0)
488 goto jail_remove_done;
493 if ((j->flags & (JF_START | JF_FAILED)) == JF_START) {
495 j->flags &= ~JF_STOP;
497 requeue(j, j->ndeps ? &depend : &ready);
509 * Mark a jail's failure for future handling.
512 failed(struct cfjail *j)
514 j->flags |= JF_FAILED;
515 TAILQ_REMOVE(j->queue, j, tq);
516 TAILQ_INSERT_HEAD(&ready, j, tq);
521 * Exit slightly more gracefully when out of memory.
535 erealloc(void *ptr, size_t size)
539 p = realloc(ptr, size);
546 estrdup(const char *str)
557 * Print a message including an optional jail name.
560 jail_note(const struct cfjail *j, const char *fmt, ...)
568 len = vsnprintf(NULL, 0, fmt, tap);
570 cs = alloca(len + 1);
571 (void)vsnprintf(cs, len + 1, fmt, ap);
574 printf("%s: %s", j->name, cs);
580 * Print a warning message including an optional jail name.
583 jail_warnx(const struct cfjail *j, const char *fmt, ...)
591 len = vsnprintf(NULL, 0, fmt, tap);
593 cs = alloca(len + 1);
594 (void)vsnprintf(cs, len + 1, fmt, ap);
597 warnx("%s: %s", j->name, cs);
606 create_jail(struct cfjail *j)
608 struct iovec jiov[4];
610 struct jailparam *jp, *setparams, *setparams2, *sjp;
612 int dopersist, ns, jid, dying, didfail;
615 * Check the jail's path, with a better error message than jail_set
618 if ((path = string_param(j->intparams[KP_PATH]))) {
619 if (j->name != NULL && path[0] != '/') {
620 jail_warnx(j, "path %s: not an absolute pathname",
624 if (stat(path, &st) < 0) {
625 jail_warnx(j, "path %s: %s", path, strerror(errno));
628 if (!S_ISDIR(st.st_mode)) {
629 jail_warnx(j, "path %s: %s", path, strerror(ENOTDIR));
635 * Copy all the parameters, except that "persist" is always set when
636 * there are commands to run later.
638 dopersist = !bool_param(j->intparams[KP_PERSIST]) &&
639 (j->intparams[IP_EXEC_START] || j->intparams[IP_COMMAND] ||
640 j->intparams[IP_EXEC_POSTSTART]);
642 alloca((j->njp + dopersist) * sizeof(struct jailparam));
643 if (dopersist && jailparam_init(sjp++, "persist") < 0) {
644 jail_warnx(j, "%s", jail_errmsg);
647 for (jp = j->jp; jp < j->jp + j->njp; jp++)
648 if (!dopersist || !equalopts(jp->jp_name, "persist"))
650 ns = sjp - setparams;
653 j->jid = jailparam_set_note(j, setparams, ns, JAIL_CREATE);
654 if (j->jid < 0 && errno == EEXIST &&
655 bool_param(j->intparams[IP_ALLOW_DYING]) &&
656 int_param(j->intparams[KP_JID], &jid) && jid != 0) {
658 * The jail already exists, but may be dying.
659 * Make sure it is, in which case an update is appropriate.
661 *(const void **)&jiov[0].iov_base = "jid";
662 jiov[0].iov_len = sizeof("jid");
663 jiov[1].iov_base = &jid;
664 jiov[1].iov_len = sizeof(jid);
665 *(const void **)&jiov[2].iov_base = "dying";
666 jiov[2].iov_len = sizeof("dying");
667 jiov[3].iov_base = &dying;
668 jiov[3].iov_len = sizeof(dying);
669 if (jail_get(jiov, 4, JAIL_DYING) < 0) {
671 * It could be that the jail just barely finished
672 * dying, or it could be that the jid never existed
673 * but the name does. In either case, another try
674 * at creating the jail should do the right thing.
677 j->jid = jailparam_set_note(j, setparams, ns,
681 if (rdtun_params(j, 1) < 0) {
685 sjp = setparams2 = alloca((j->njp + dopersist) *
686 sizeof(struct jailparam));
687 for (jp = setparams; jp < setparams + ns; jp++)
689 !strcmp(jp->jp_name, "jid"))
691 j->jid = jailparam_set_note(j, setparams2,
692 sjp - setparams2, JAIL_UPDATE | JAIL_DYING);
694 * Again, perhaps the jail just finished dying.
696 if (j->jid < 0 && errno == ENOENT)
697 j->jid = jailparam_set_note(j,
698 setparams, ns, JAIL_CREATE);
702 if (j->jid < 0 && !didfail) {
703 jail_warnx(j, "%s", jail_errmsg);
707 jailparam_free(setparams, 1);
709 j->flags |= JF_PERSIST;
715 * Remove a temporarily set "persist" parameter.
718 clear_persist(struct cfjail *j)
720 struct iovec jiov[4];
723 if (!(j->flags & JF_PERSIST))
725 j->flags &= ~JF_PERSIST;
726 *(const void **)&jiov[0].iov_base = "jid";
727 jiov[0].iov_len = sizeof("jid");
728 jiov[1].iov_base = &j->jid;
729 jiov[1].iov_len = sizeof(j->jid);
730 *(const void **)&jiov[2].iov_base = "nopersist";
731 jiov[2].iov_len = sizeof("nopersist");
732 jiov[3].iov_base = NULL;
734 jid = jail_set(jiov, 4, JAIL_UPDATE);
736 jail_note(j, "jail_set(JAIL_UPDATE) jid=%d nopersist%s%s\n",
737 j->jid, jid < 0 ? ": " : "",
738 jid < 0 ? strerror(errno) : "");
742 * Set a jail's parameters.
745 update_jail(struct cfjail *j)
747 struct jailparam *jp, *setparams, *sjp;
751 for (jp = j->jp; jp < j->jp + j->njp; jp++)
756 sjp = setparams = alloca(++ns * sizeof(struct jailparam));
757 if (jailparam_init(sjp, "jid") < 0 ||
758 jailparam_import_raw(sjp, &j->jid, sizeof j->jid) < 0) {
759 jail_warnx(j, "%s", jail_errmsg);
763 for (jp = j->jp; jp < j->jp + j->njp; jp++)
767 jid = jailparam_set_note(j, setparams, ns,
768 bool_param(j->intparams[IP_ALLOW_DYING])
769 ? JAIL_UPDATE | JAIL_DYING : JAIL_UPDATE);
771 jail_warnx(j, "%s", jail_errmsg);
774 jailparam_free(setparams, 1);
779 * Return if a jail set would change any create-only parameters.
782 rdtun_params(struct cfjail *j, int dofail)
784 struct jailparam *jp, *rtparams, *rtjp;
787 if (j->flags & JF_RDTUN)
789 j->flags |= JF_RDTUN;
791 for (jp = j->jp; jp < j->jp + j->njp; jp++)
792 if (JP_RDTUN(jp) && strcmp(jp->jp_name, "jid"))
796 rtjp = rtparams = alloca(++nrt * sizeof(struct jailparam));
797 if (jailparam_init(rtjp, "jid") < 0 ||
798 jailparam_import_raw(rtjp, &j->jid, sizeof j->jid) < 0) {
799 jail_warnx(j, "%s", jail_errmsg);
802 for (jp = j->jp; jp < j->jp + j->njp; jp++)
803 if (JP_RDTUN(jp) && strcmp(jp->jp_name, "jid"))
806 if (jailparam_get(rtparams, nrt,
807 bool_param(j->intparams[IP_ALLOW_DYING]) ? JAIL_DYING : 0) > 0) {
809 for (jp = j->jp; rtjp < rtparams + nrt; jp++) {
810 if (JP_RDTUN(jp) && strcmp(jp->jp_name, "jid")) {
811 if (!((jp->jp_flags & (JP_BOOL | JP_NOBOOL)) &&
812 jp->jp_valuelen == 0 &&
813 *(int *)jp->jp_value) &&
814 !(rtjp->jp_valuelen == jp->jp_valuelen &&
815 !memcmp(rtjp->jp_value, jp->jp_value,
818 jail_warnx(j, "%s cannot be "
819 "changed after creation",
831 for (rtjp = rtparams + 1; rtjp < rtparams + nrt; rtjp++)
832 rtjp->jp_name = NULL;
833 jailparam_free(rtparams, nrt);
838 * Get the jail's jid if it is running.
841 running_jid(struct cfjail *j, int dflag)
843 struct iovec jiov[2];
848 if ((pval = string_param(j->intparams[KP_JID]))) {
849 if (!(jid = strtol(pval, &ep, 10)) || *ep) {
853 *(const void **)&jiov[0].iov_base = "jid";
854 jiov[0].iov_len = sizeof("jid");
855 jiov[1].iov_base = &jid;
856 jiov[1].iov_len = sizeof(jid);
857 } else if ((pval = string_param(j->intparams[KP_NAME]))) {
858 *(const void **)&jiov[0].iov_base = "name";
859 jiov[0].iov_len = sizeof("name");
860 jiov[1].iov_len = strlen(pval) + 1;
861 jiov[1].iov_base = alloca(jiov[1].iov_len);
862 strcpy(jiov[1].iov_base, pval);
867 j->jid = jail_get(jiov, 2, dflag ? JAIL_DYING : 0);
871 jail_quoted_warnx(const struct cfjail *j, const char *name_msg,
872 const char *noname_msg)
876 if ((pval = j->name) || (pval = string_param(j->intparams[KP_JID])) ||
877 (pval = string_param(j->intparams[KP_NAME])))
878 warnx("\"%s\" %s", pval, name_msg);
880 warnx("%s", noname_msg);
884 * Set jail parameters and possible print them out.
887 jailparam_set_note(const struct cfjail *j, struct jailparam *jp, unsigned njp,
894 jid = jailparam_set(jp, njp, flags);
896 jail_note(j, "jail_set(%s%s)",
897 (flags & (JAIL_CREATE | JAIL_UPDATE)) == JAIL_CREATE
898 ? "JAIL_CREATE" : "JAIL_UPDATE",
899 (flags & JAIL_DYING) ? " | JAIL_DYING" : "");
900 for (i = 0; i < njp; i++) {
901 printf(" %s", jp[i].jp_name);
902 if (jp[i].jp_value == NULL)
905 value = jailparam_export(jp + i);
907 err(1, "jailparam_export");
908 quoted_print(stdout, value);
912 printf(": %s", strerror(errno));
919 * Print a jail record.
922 print_jail(FILE *fp, struct cfjail *j, int oldcl)
927 fprintf(fp, "%d\t", j->jid);
928 print_param(fp, j->intparams[KP_PATH], ',', 0);
930 print_param(fp, j->intparams[KP_HOST_HOSTNAME], ',', 0);
933 print_param(fp, j->intparams[KP_IP4_ADDR], ',', 0);
935 if (j->intparams[KP_IP4_ADDR] &&
936 !TAILQ_EMPTY(&j->intparams[KP_IP4_ADDR]->val) &&
937 j->intparams[KP_IP6_ADDR] &&
938 !TAILQ_EMPTY(&j->intparams[KP_IP6_ADDR]->val))
943 print_param(fp, j->intparams[KP_IP6_ADDR], ',', 0);
946 print_param(fp, j->intparams[IP_COMMAND], ' ', 0);
948 fprintf(fp, "jid=%d", j->jid);
949 TAILQ_FOREACH(p, &j->params, tq)
950 if (strcmp(p->name, "jid")) {
952 print_param(fp, p, ',', 1);
959 * Print a parameter value, or a name=value pair.
962 print_param(FILE *fp, const struct cfparam *p, int sep, int doname)
964 const struct cfstring *s, *ts;
968 if (p == NULL || TAILQ_EMPTY(&p->val))
972 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
973 quoted_print(fp, s->s);
980 * Print a string with quotes around spaces.
983 quoted_print(FILE *fp, char *str)
989 : strchr(p, '\'') ? '"'
990 : strchr(p, '"') ? '\''
991 : strchr(p, ' ') || strchr(p, '\t') ? '"'
996 if (c == '\\' || c == qc)
1008 (void)fprintf(stderr,
1009 "usage: jail [-dhilqv] [-J jid_file] [-u username] [-U username]\n"
1010 " -[cmr] param=value ... [command=command ...]\n"
1011 " jail [-dqv] [-f file] -[cmr] [jail]\n"
1012 " jail [-qv] [-f file] -[rR] ['*' | jail ...]\n"
1013 " jail [-dhilqv] [-J jid_file] [-u username] [-U username]\n"
1014 " [-n jailname] [-s securelevel]\n"
1015 " path hostname [ip[,...]] command ...\n");