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freebsd-dev/usr.sbin/jail/jail.c
Jamie Gritton 8f1543785f jail: handle jailsys parameters in modification permission test 
Avoid a null dereference when a value-less jailsys parameter is passed
to "jail -m".  There was already code to handle boolean parameters,
but in reality any parameter could be passed without a value.
2022-03-25 19:16:51 -07:00

1065 lines
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1999 Poul-Henning Kamp.
* Copyright (c) 2009-2012 James Gritton
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <err.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "jailp.h"
#define JP_RDTUN(jp) (((jp)->jp_ctltype & CTLFLAG_RDTUN) == CTLFLAG_RDTUN)
struct permspec {
const char *name;
enum intparam ipnum;
int rev;
};
const char *cfname;
int iflag;
int note_remove;
int verbose;
const char *separator = "\t";
static void clear_persist(struct cfjail *j);
static int update_jail(struct cfjail *j);
static int rdtun_params(struct cfjail *j, int dofail);
static void running_jid(struct cfjail *j, int dflag);
static void jail_quoted_warnx(const struct cfjail *j, const char *name_msg,
const char *noname_msg);
static int jailparam_set_note(const struct cfjail *j, struct jailparam *jp,
unsigned njp, int flags);
static void print_jail(FILE *fp, struct cfjail *j, int oldcl, int running);
static void print_param(FILE *fp, const struct cfparam *p, int sep, int doname);
static void show_jails(void);
static void quoted_print(FILE *fp, char *str);
static void usage(void);
static struct permspec perm_sysctl[] = {
{ "security.jail.set_hostname_allowed", KP_ALLOW_SET_HOSTNAME, 0 },
{ "security.jail.sysvipc_allowed", KP_ALLOW_SYSVIPC, 0 },
{ "security.jail.allow_raw_sockets", KP_ALLOW_RAW_SOCKETS, 0 },
{ "security.jail.chflags_allowed", KP_ALLOW_CHFLAGS, 0 },
{ "security.jail.mount_allowed", KP_ALLOW_MOUNT, 0 },
{ "security.jail.socket_unixiproute_only", KP_ALLOW_SOCKET_AF, 1 },
};
static const enum intparam startcommands[] = {
IP__NULL,
IP_EXEC_PREPARE,
#ifdef INET
IP__IP4_IFADDR,
#endif
#ifdef INET6
IP__IP6_IFADDR,
#endif
IP_MOUNT,
IP__MOUNT_FROM_FSTAB,
IP_MOUNT_DEVFS,
IP_MOUNT_FDESCFS,
IP_MOUNT_PROCFS,
IP_EXEC_PRESTART,
IP__OP,
IP_EXEC_CREATED,
IP_VNET_INTERFACE,
IP_EXEC_START,
IP_COMMAND,
IP_EXEC_POSTSTART,
IP__NULL
};
static const enum intparam stopcommands[] = {
IP__NULL,
IP_EXEC_PRESTOP,
IP_EXEC_STOP,
IP_STOP_TIMEOUT,
IP__OP,
IP_EXEC_POSTSTOP,
IP_MOUNT_PROCFS,
IP_MOUNT_FDESCFS,
IP_MOUNT_DEVFS,
IP__MOUNT_FROM_FSTAB,
IP_MOUNT,
#ifdef INET6
IP__IP6_IFADDR,
#endif
#ifdef INET
IP__IP4_IFADDR,
#endif
IP_EXEC_RELEASE,
IP__NULL
};
int
main(int argc, char **argv)
{
struct stat st;
FILE *jfp;
struct cfjail *j;
char *JidFile;
size_t sysvallen;
unsigned op, pi;
int ch, docf, error, i, oldcl, sysval;
int dflag, Rflag;
#if defined(INET) || defined(INET6)
char *cs, *ncs;
#endif
#if defined(INET) && defined(INET6)
struct in6_addr addr6;
#endif
op = 0;
dflag = Rflag = 0;
docf = 1;
cfname = CONF_FILE;
JidFile = NULL;
while ((ch = getopt(argc, argv, "cde:f:hiJ:lmn:p:qrRs:u:U:v")) != -1) {
switch (ch) {
case 'c':
op |= JF_START;
break;
case 'd':
dflag = 1;
break;
case 'e':
op |= JF_SHOW;
separator = optarg;
break;
case 'f':
cfname = optarg;
break;
case 'h':
#if defined(INET) || defined(INET6)
add_param(NULL, NULL, IP_IP_HOSTNAME, NULL);
#endif
docf = 0;
break;
case 'i':
iflag = 1;
verbose = -1;
break;
case 'J':
JidFile = optarg;
break;
case 'l':
add_param(NULL, NULL, IP_EXEC_CLEAN, NULL);
docf = 0;
break;
case 'm':
op |= JF_SET;
break;
case 'n':
add_param(NULL, NULL, KP_NAME, optarg);
docf = 0;
break;
case 'p':
paralimit = strtol(optarg, NULL, 10);
if (paralimit == 0)
paralimit = -1;
break;
case 'q':
verbose = -1;
break;
case 'r':
op |= JF_STOP;
break;
case 'R':
op |= JF_STOP;
Rflag = 1;
break;
case 's':
add_param(NULL, NULL, KP_SECURELEVEL, optarg);
docf = 0;
break;
case 'u':
add_param(NULL, NULL, IP_EXEC_JAIL_USER, optarg);
add_param(NULL, NULL, IP_EXEC_SYSTEM_JAIL_USER, NULL);
docf = 0;
break;
case 'U':
add_param(NULL, NULL, IP_EXEC_JAIL_USER, optarg);
add_param(NULL, NULL, IP_EXEC_SYSTEM_JAIL_USER,
"false");
docf = 0;
break;
case 'v':
verbose = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
/* Find out which of the four command line styles this is. */
oldcl = 0;
if (!op) {
/* Old-style command line with four fixed parameters */
if (argc < 4 || argv[0][0] != '/')
usage();
op = JF_START;
docf = 0;
oldcl = 1;
add_param(NULL, NULL, KP_PATH, argv[0]);
add_param(NULL, NULL, KP_HOST_HOSTNAME, argv[1]);
#if defined(INET) || defined(INET6)
if (argv[2][0] != '\0') {
for (cs = argv[2];; cs = ncs + 1) {
ncs = strchr(cs, ',');
if (ncs)
*ncs = '\0';
add_param(NULL, NULL,
#if defined(INET) && defined(INET6)
inet_pton(AF_INET6, cs, &addr6) == 1
? KP_IP6_ADDR : KP_IP4_ADDR,
#elif defined(INET)
KP_IP4_ADDR,
#elif defined(INET6)
KP_IP6_ADDR,
#endif
cs);
if (!ncs)
break;
}
}
#endif
for (i = 3; i < argc; i++)
add_param(NULL, NULL, IP_COMMAND, argv[i]);
/* Emulate the defaults from security.jail.* sysctls. */
sysvallen = sizeof(sysval);
if (sysctlbyname("security.jail.jailed", &sysval, &sysvallen,
NULL, 0) == 0 && sysval == 0) {
for (pi = 0; pi < sizeof(perm_sysctl) /
sizeof(perm_sysctl[0]); pi++) {
sysvallen = sizeof(sysval);
if (sysctlbyname(perm_sysctl[pi].name,
&sysval, &sysvallen, NULL, 0) == 0)
add_param(NULL, NULL,
perm_sysctl[pi].ipnum,
(sysval ? 1 : 0) ^
perm_sysctl[pi].rev
? NULL : "false");
}
}
} else if (op == JF_STOP || op == JF_SHOW) {
/* Just print list of all configured non-wildcard jails */
if (op == JF_SHOW) {
load_config();
show_jails();
exit(0);
}
/* Jail remove, perhaps using the config file */
if (!docf || argc == 0)
usage();
if (!Rflag)
for (i = 0; i < argc; i++)
if (strchr(argv[i], '='))
usage();
if ((docf = !Rflag &&
(!strcmp(cfname, "-") || stat(cfname, &st) == 0)))
load_config();
note_remove = docf || argc > 1 || wild_jail_name(argv[0]);
} else if (argc > 1 || (argc == 1 && strchr(argv[0], '='))) {
/* Single jail specified on the command line */
if (Rflag)
usage();
docf = 0;
for (i = 0; i < argc; i++) {
if (!strncmp(argv[i], "command", 7) &&
(argv[i][7] == '\0' || argv[i][7] == '=')) {
if (argv[i][7] == '=')
add_param(NULL, NULL, IP_COMMAND,
argv[i] + 8);
for (i++; i < argc; i++)
add_param(NULL, NULL, IP_COMMAND,
argv[i]);
}
#ifdef INET
else if (!strncmp(argv[i], "ip4.addr=", 9)) {
for (cs = argv[i] + 9;; cs = ncs + 1) {
ncs = strchr(cs, ',');
if (ncs)
*ncs = '\0';
add_param(NULL, NULL, KP_IP4_ADDR, cs);
if (!ncs)
break;
}
}
#endif
#ifdef INET6
else if (!strncmp(argv[i], "ip6.addr=", 9)) {
for (cs = argv[i] + 9;; cs = ncs + 1) {
ncs = strchr(cs, ',');
if (ncs)
*ncs = '\0';
add_param(NULL, NULL, KP_IP6_ADDR, cs);
if (!ncs)
break;
}
}
#endif
else
add_param(NULL, NULL, 0, argv[i]);
}
} else {
/* From the config file, perhaps with a specified jail */
if (Rflag || !docf)
usage();
load_config();
}
/* Find out which jails will be run. */
dep_setup(docf);
error = 0;
if (op == JF_STOP) {
for (i = 0; i < argc; i++)
if (start_state(argv[i], docf, op, Rflag) < 0)
error = 1;
} else {
if (start_state(argv[0], docf, op, 0) < 0)
exit(1);
}
jfp = NULL;
if (JidFile != NULL) {
jfp = fopen(JidFile, "w");
if (jfp == NULL)
err(1, "open %s", JidFile);
setlinebuf(jfp);
}
setlinebuf(stdout);
/*
* The main loop: Get an available jail and perform the required
* operation on it. When that is done, the jail may be finished,
* or it may go back for the next step.
*/
while ((j = next_jail()))
{
if (j->flags & JF_FAILED) {
error = 1;
if (j->comparam == NULL) {
dep_done(j, 0);
continue;
}
}
if (!(j->flags & JF_PARAMS))
{
j->flags |= JF_PARAMS;
if (dflag)
add_param(j, NULL, IP_ALLOW_DYING, NULL);
if (check_intparams(j) < 0)
continue;
if ((j->flags & (JF_START | JF_SET)) &&
import_params(j) < 0)
continue;
}
if (!j->jid)
running_jid(j,
(j->flags & (JF_SET | JF_DEPEND)) == JF_SET
? dflag || bool_param(j->intparams[IP_ALLOW_DYING])
: 0);
if (finish_command(j))
continue;
switch (j->flags & JF_OP_MASK) {
/*
* These operations just turn into a different op
* depending on the jail's current status.
*/
case JF_START_SET:
j->flags = j->jid < 0 ? JF_START : JF_SET;
break;
case JF_SET_RESTART:
if (j->jid < 0) {
jail_quoted_warnx(j, "not found",
"no jail specified");
failed(j);
continue;
}
j->flags = rdtun_params(j, 0) ? JF_RESTART : JF_SET;
if (j->flags == JF_RESTART)
dep_reset(j);
break;
case JF_START_SET_RESTART:
j->flags = j->jid < 0 ? JF_START
: rdtun_params(j, 0) ? JF_RESTART : JF_SET;
if (j->flags == JF_RESTART)
dep_reset(j);
}
switch (j->flags & JF_OP_MASK) {
case JF_START:
if (j->comparam == NULL) {
if (j->jid > 0 &&
!(j->flags & (JF_DEPEND | JF_WILD))) {
jail_quoted_warnx(j, "already exists",
NULL);
failed(j);
continue;
}
if (dep_check(j))
continue;
if (j->jid > 0)
goto jail_create_done;
j->comparam = startcommands;
j->comstring = NULL;
}
if (next_command(j))
continue;
jail_create_done:
clear_persist(j);
if (jfp != NULL)
print_jail(jfp, j, oldcl, 1);
dep_done(j, 0);
break;
case JF_SET:
if (j->jid < 0 && !(j->flags & JF_DEPEND)) {
jail_quoted_warnx(j, "not found",
"no jail specified");
failed(j);
continue;
}
if (dep_check(j))
continue;
if (!(j->flags & JF_DEPEND)) {
if (rdtun_params(j, 1) < 0 ||
update_jail(j) < 0)
continue;
if (verbose >= 0 && (j->name || verbose > 0))
jail_note(j, "updated\n");
}
dep_done(j, 0);
break;
case JF_STOP:
case JF_RESTART:
if (j->comparam == NULL) {
if (dep_check(j))
continue;
if (j->jid < 0) {
if (!(j->flags & (JF_DEPEND|JF_WILD))) {
if (verbose >= 0)
jail_quoted_warnx(j,
"not found", NULL);
failed(j);
}
goto jail_remove_done;
}
j->comparam = stopcommands;
j->comstring = NULL;
} else if ((j->flags & JF_FAILED) && j->jid > 0)
goto jail_remove_done;
if (next_command(j))
continue;
jail_remove_done:
dep_done(j, 0);
if ((j->flags & (JF_START | JF_FAILED)) == JF_START) {
j->comparam = NULL;
j->flags &= ~JF_STOP;
dep_reset(j);
requeue(j, j->ndeps ? &depend : &ready);
}
break;
}
}
if (jfp != NULL)
fclose(jfp);
exit(error);
}
/*
* Mark a jail's failure for future handling.
*/
void
failed(struct cfjail *j)
{
j->flags |= JF_FAILED;
TAILQ_REMOVE(j->queue, j, tq);
TAILQ_INSERT_HEAD(&ready, j, tq);
j->queue = &ready;
}
/*
* Exit slightly more gracefully when out of memory.
*/
void *
emalloc(size_t size)
{
void *p;
p = malloc(size);
if (!p)
err(1, "malloc");
return p;
}
void *
erealloc(void *ptr, size_t size)
{
void *p;
p = realloc(ptr, size);
if (!p)
err(1, "malloc");
return p;
}
char *
estrdup(const char *str)
{
char *ns;
ns = strdup(str);
if (!ns)
err(1, "malloc");
return ns;
}
/*
* Print a message including an optional jail name.
*/
void
jail_note(const struct cfjail *j, const char *fmt, ...)
{
va_list ap, tap;
char *cs;
size_t len;
va_start(ap, fmt);
va_copy(tap, ap);
len = vsnprintf(NULL, 0, fmt, tap);
va_end(tap);
cs = alloca(len + 1);
(void)vsnprintf(cs, len + 1, fmt, ap);
va_end(ap);
if (j->name)
printf("%s: %s", j->name, cs);
else
printf("%s", cs);
}
/*
* Print a warning message including an optional jail name.
*/
void
jail_warnx(const struct cfjail *j, const char *fmt, ...)
{
va_list ap, tap;
char *cs;
size_t len;
va_start(ap, fmt);
va_copy(tap, ap);
len = vsnprintf(NULL, 0, fmt, tap);
va_end(tap);
cs = alloca(len + 1);
(void)vsnprintf(cs, len + 1, fmt, ap);
va_end(ap);
if (j->name)
warnx("%s: %s", j->name, cs);
else
warnx("%s", cs);
}
/*
* Create a new jail.
*/
int
create_jail(struct cfjail *j)
{
struct iovec jiov[4];
struct stat st;
struct jailparam *jp, *setparams, *setparams2, *sjp;
const char *path;
int dopersist, ns, jid, dying, didfail;
/*
* Check the jail's path, with a better error message than jail_set
* gives.
*/
if ((path = string_param(j->intparams[KP_PATH]))) {
if (j->name != NULL && path[0] != '/') {
jail_warnx(j, "path %s: not an absolute pathname",
path);
return -1;
}
if (stat(path, &st) < 0) {
jail_warnx(j, "path %s: %s", path, strerror(errno));
return -1;
}
if (!S_ISDIR(st.st_mode)) {
jail_warnx(j, "path %s: %s", path, strerror(ENOTDIR));
return -1;
}
}
/*
* Copy all the parameters, except that "persist" is always set when
* there are commands to run later.
*/
dopersist = !bool_param(j->intparams[KP_PERSIST]) &&
(j->intparams[IP_EXEC_START] || j->intparams[IP_COMMAND] ||
j->intparams[IP_EXEC_POSTSTART]);
sjp = setparams =
alloca((j->njp + dopersist) * sizeof(struct jailparam));
if (dopersist && jailparam_init(sjp++, "persist") < 0) {
jail_warnx(j, "%s", jail_errmsg);
return -1;
}
for (jp = j->jp; jp < j->jp + j->njp; jp++)
if (!dopersist || !equalopts(jp->jp_name, "persist"))
*sjp++ = *jp;
ns = sjp - setparams;
didfail = 0;
j->jid = jailparam_set_note(j, setparams, ns, JAIL_CREATE);
if (j->jid < 0 && errno == EEXIST &&
bool_param(j->intparams[IP_ALLOW_DYING]) &&
int_param(j->intparams[KP_JID], &jid) && jid != 0) {
/*
* The jail already exists, but may be dying.
* Make sure it is, in which case an update is appropriate.
*/
jiov[0].iov_base = __DECONST(char *, "jid");
jiov[0].iov_len = sizeof("jid");
jiov[1].iov_base = &jid;
jiov[1].iov_len = sizeof(jid);
jiov[2].iov_base = __DECONST(char *, "dying");
jiov[2].iov_len = sizeof("dying");
jiov[3].iov_base = &dying;
jiov[3].iov_len = sizeof(dying);
if (jail_get(jiov, 4, JAIL_DYING) < 0) {
/*
* It could be that the jail just barely finished
* dying, or it could be that the jid never existed
* but the name does. In either case, another try
* at creating the jail should do the right thing.
*/
if (errno == ENOENT)
j->jid = jailparam_set_note(j, setparams, ns,
JAIL_CREATE);
} else if (dying) {
j->jid = jid;
if (rdtun_params(j, 1) < 0) {
j->jid = -1;
didfail = 1;
} else {
sjp = setparams2 = alloca((j->njp + dopersist) *
sizeof(struct jailparam));
for (jp = setparams; jp < setparams + ns; jp++)
if (!JP_RDTUN(jp) ||
!strcmp(jp->jp_name, "jid"))
*sjp++ = *jp;
j->jid = jailparam_set_note(j, setparams2,
sjp - setparams2, JAIL_UPDATE | JAIL_DYING);
/*
* Again, perhaps the jail just finished dying.
*/
if (j->jid < 0 && errno == ENOENT)
j->jid = jailparam_set_note(j,
setparams, ns, JAIL_CREATE);
}
}
}
if (j->jid < 0 && !didfail) {
jail_warnx(j, "%s", jail_errmsg);
failed(j);
}
if (dopersist) {
jailparam_free(setparams, 1);
if (j->jid > 0)
j->flags |= JF_PERSIST;
}
return j->jid;
}
/*
* Remove a temporarily set "persist" parameter.
*/
static void
clear_persist(struct cfjail *j)
{
struct iovec jiov[4];
int jid;
if (!(j->flags & JF_PERSIST))
return;
j->flags &= ~JF_PERSIST;
jiov[0].iov_base = __DECONST(char *, "jid");
jiov[0].iov_len = sizeof("jid");
jiov[1].iov_base = &j->jid;
jiov[1].iov_len = sizeof(j->jid);
jiov[2].iov_base = __DECONST(char *, "nopersist");
jiov[2].iov_len = sizeof("nopersist");
jiov[3].iov_base = NULL;
jiov[3].iov_len = 0;
jid = jail_set(jiov, 4, JAIL_UPDATE);
if (verbose > 0)
jail_note(j, "jail_set(JAIL_UPDATE) jid=%d nopersist%s%s\n",
j->jid, jid < 0 ? ": " : "",
jid < 0 ? strerror(errno) : "");
}
/*
* Set a jail's parameters.
*/
static int
update_jail(struct cfjail *j)
{
struct jailparam *jp, *setparams, *sjp;
int ns, jid;
ns = 0;
for (jp = j->jp; jp < j->jp + j->njp; jp++)
if (!JP_RDTUN(jp))
ns++;
if (ns == 0)
return 0;
sjp = setparams = alloca(++ns * sizeof(struct jailparam));
if (jailparam_init(sjp, "jid") < 0 ||
jailparam_import_raw(sjp, &j->jid, sizeof j->jid) < 0) {
jail_warnx(j, "%s", jail_errmsg);
failed(j);
return -1;
}
for (jp = j->jp; jp < j->jp + j->njp; jp++)
if (!JP_RDTUN(jp))
*++sjp = *jp;
jid = jailparam_set_note(j, setparams, ns,
bool_param(j->intparams[IP_ALLOW_DYING])
? JAIL_UPDATE | JAIL_DYING : JAIL_UPDATE);
if (jid < 0) {
jail_warnx(j, "%s", jail_errmsg);
failed(j);
}
jailparam_free(setparams, 1);
return jid;
}
/*
* Return if a jail set would change any create-only parameters.
*/
static int
rdtun_params(struct cfjail *j, int dofail)
{
struct jailparam *jp, *rtparams, *rtjp;
const void *jp_value;
size_t jp_valuelen;
int nrt, rval, bool_true;
if (j->flags & JF_RDTUN)
return 0;
j->flags |= JF_RDTUN;
nrt = 0;
for (jp = j->jp; jp < j->jp + j->njp; jp++)
if (JP_RDTUN(jp) && strcmp(jp->jp_name, "jid"))
nrt++;
if (nrt == 0)
return 0;
rtjp = rtparams = alloca(++nrt * sizeof(struct jailparam));
if (jailparam_init(rtjp, "jid") < 0 ||
jailparam_import_raw(rtjp, &j->jid, sizeof j->jid) < 0) {
jail_warnx(j, "%s", jail_errmsg);
exit(1);
}
for (jp = j->jp; jp < j->jp + j->njp; jp++)
if (JP_RDTUN(jp) && strcmp(jp->jp_name, "jid")) {
*++rtjp = *jp;
rtjp->jp_value = NULL;
}
rval = 0;
if (jailparam_get(rtparams, nrt,
bool_param(j->intparams[IP_ALLOW_DYING]) ? JAIL_DYING : 0) > 0) {
rtjp = rtparams + 1;
for (jp = j->jp; rtjp < rtparams + nrt; jp++) {
if (JP_RDTUN(jp) && strcmp(jp->jp_name, "jid")) {
jp_value = jp->jp_value;
jp_valuelen = jp->jp_valuelen;
if (jp_value == NULL && jp_valuelen > 0) {
if (jp->jp_flags & (JP_BOOL |
JP_NOBOOL | JP_JAILSYS)) {
bool_true = 1;
jp_value = &bool_true;
jp_valuelen = sizeof(bool_true);
} else if ((jp->jp_ctltype & CTLTYPE) ==
CTLTYPE_STRING)
jp_value = "";
else
jp_valuelen = 0;
}
if (rtjp->jp_valuelen != jp_valuelen ||
(CTLTYPE_STRING ? strncmp(rtjp->jp_value,
jp_value, jp_valuelen)
: memcmp(rtjp->jp_value, jp_value,
jp_valuelen))) {
if (dofail) {
jail_warnx(j, "%s cannot be "
"changed after creation",
jp->jp_name);
failed(j);
rval = -1;
} else
rval = 1;
break;
}
rtjp++;
}
}
}
for (rtjp = rtparams + 1; rtjp < rtparams + nrt; rtjp++)
rtjp->jp_name = NULL;
jailparam_free(rtparams, nrt);
return rval;
}
/*
* Get the jail's jid if it is running.
*/
static void
running_jid(struct cfjail *j, int dflag)
{
struct iovec jiov[2];
const char *pval;
char *ep;
int jid;
if ((pval = string_param(j->intparams[KP_JID]))) {
if (!(jid = strtol(pval, &ep, 10)) || *ep) {
j->jid = -1;
return;
}
jiov[0].iov_base = __DECONST(char *, "jid");
jiov[0].iov_len = sizeof("jid");
jiov[1].iov_base = &jid;
jiov[1].iov_len = sizeof(jid);
} else if ((pval = string_param(j->intparams[KP_NAME]))) {
jiov[0].iov_base = __DECONST(char *, "name");
jiov[0].iov_len = sizeof("name");
jiov[1].iov_len = strlen(pval) + 1;
jiov[1].iov_base = alloca(jiov[1].iov_len);
strcpy(jiov[1].iov_base, pval);
} else {
j->jid = -1;
return;
}
j->jid = jail_get(jiov, 2, dflag ? JAIL_DYING : 0);
}
static void
jail_quoted_warnx(const struct cfjail *j, const char *name_msg,
const char *noname_msg)
{
const char *pval;
if ((pval = j->name) || (pval = string_param(j->intparams[KP_JID])) ||
(pval = string_param(j->intparams[KP_NAME])))
warnx("\"%s\" %s", pval, name_msg);
else
warnx("%s", noname_msg);
}
/*
* Set jail parameters and possibly print them out.
*/
static int
jailparam_set_note(const struct cfjail *j, struct jailparam *jp, unsigned njp,
int flags)
{
char *value;
int jid;
unsigned i;
jid = jailparam_set(jp, njp, flags);
if (verbose > 0) {
jail_note(j, "jail_set(%s%s)",
(flags & (JAIL_CREATE | JAIL_UPDATE)) == JAIL_CREATE
? "JAIL_CREATE" : "JAIL_UPDATE",
(flags & JAIL_DYING) ? " | JAIL_DYING" : "");
for (i = 0; i < njp; i++) {
printf(" %s", jp[i].jp_name);
if (jp[i].jp_value == NULL)
continue;
putchar('=');
value = jailparam_export(jp + i);
if (value == NULL)
err(1, "jailparam_export");
quoted_print(stdout, value);
free(value);
}
if (jid < 0)
printf(": %s", strerror(errno));
printf("\n");
}
return jid;
}
/*
* Print a jail record.
*/
static void
print_jail(FILE *fp, struct cfjail *j, int oldcl, int running)
{
struct cfparam *p;
int printsep;
if (oldcl) {
if (running)
fprintf(fp, "%d%s", j->jid, separator);
print_param(fp, j->intparams[KP_PATH], ',', 0);
fputs(separator, fp);
print_param(fp, j->intparams[KP_HOST_HOSTNAME], ',', 0);
fputs(separator, fp);
#ifdef INET
print_param(fp, j->intparams[KP_IP4_ADDR], ',', 0);
#ifdef INET6
if (j->intparams[KP_IP4_ADDR] &&
!TAILQ_EMPTY(&j->intparams[KP_IP4_ADDR]->val) &&
j->intparams[KP_IP6_ADDR] &&
!TAILQ_EMPTY(&j->intparams[KP_IP6_ADDR]->val))
putc(',', fp);
#endif
#endif
#ifdef INET6
print_param(fp, j->intparams[KP_IP6_ADDR], ',', 0);
#endif
fputs(separator, fp);
print_param(fp, j->intparams[IP_COMMAND], ' ', 0);
} else {
printsep = 0;
if (running) {
fprintf(fp, "jid=%d", j->jid);
printsep = 1;
}
TAILQ_FOREACH(p, &j->params, tq)
if (strcmp(p->name, "jid")) {
if (printsep)
fputs(separator, fp);
else
printsep = 1;
print_param(fp, p, ',', 1);
}
}
putc('\n', fp);
}
/*
* Exhibit list of all configured non-wildcard jails
*/
static void
show_jails(void)
{
struct cfjail *j;
TAILQ_FOREACH(j, &cfjails, tq)
print_jail(stdout, j, 0, 0);
}
/*
* Print a parameter value, or a name=value pair.
*/
static void
print_param(FILE *fp, const struct cfparam *p, int sep, int doname)
{
const struct cfstring *s, *ts;
if (doname)
fputs(p->name, fp);
if (p == NULL || TAILQ_EMPTY(&p->val))
return;
if (doname)
putc('=', fp);
TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
quoted_print(fp, s->s);
if (ts != NULL)
putc(sep, fp);
}
}
/*
* Print a string with quotes around spaces.
*/
static void
quoted_print(FILE *fp, char *str)
{
int c, qc;
char *p = str;
qc = !*p ? '"'
: strchr(p, '\'') ? '"'
: strchr(p, '"') ? '\''
: strchr(p, ' ') || strchr(p, '\t') ? '"'
: 0;
if (qc)
putc(qc, fp);
while ((c = *p++)) {
if (c == '\\' || c == qc)
putc('\\', fp);
putc(c, fp);
}
if (qc)
putc(qc, fp);
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage: jail [-dhilqv] [-J jid_file] [-u username] [-U username]\n"
" -[cmr] param=value ... [command=command ...]\n"
" jail [-dqv] [-f file] -[cmr] [jail]\n"
" jail [-qv] [-f file] -[rR] ['*' | jail ...]\n"
" jail [-dhilqv] [-J jid_file] [-u username] [-U username]\n"
" [-n jailname] [-s securelevel]\n"
" path hostname ip[,...] command ...\n"
" jail [-f file] -e separator\n");
exit(1);
}
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