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freebsd-dev/usr.sbin/jail/config.c
Hiroki Sato 64bb8a3881 Implement PF_IMMUTABLE flag and apply it to "name" and "jid" in 
jail.conf parameters.  This flag disallows redefinition of the parameter.

"name" and/or "jid" are automatically defined in jail.conf by using
the jail names at the front of jail parameter definitions.  However,
one could override them by using a variable with the same name like
$name = "foo".  This confused the parser and could end up with SIGSEGV.

Note that this change also affects a case when all of parameters are
defined in the command line arguments, not in jail.conf.  Specifically,
"jail -c name=j1 name=j2" no longer works.  This should be harmless.

PR:		196574
Reviewed by:	jamie
Differential Revision:	https://reviews.freebsd.org/D3017
2015-07-08 16:37:48 +00:00

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/*-
* Copyright (c) 2011 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/errno.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <err.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "jailp.h"
struct ipspec {
const char *name;
unsigned flags;
};
extern FILE *yyin;
extern int yynerrs;
extern int yyparse(void);
struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails);
static void free_param(struct cfparams *pp, struct cfparam *p);
static void free_param_strings(struct cfparam *p);
static const struct ipspec intparams[] = {
[IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL},
[IP_COMMAND] = {"command", PF_INTERNAL},
[IP_DEPEND] = {"depend", PF_INTERNAL},
[IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL},
[IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL},
[IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT},
[IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL},
[IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL},
[IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL},
[IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL},
[IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL},
[IP_EXEC_START] = {"exec.start", PF_INTERNAL},
[IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL},
[IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user",
PF_INTERNAL | PF_BOOL},
[IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL},
[IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT},
#if defined(INET) || defined(INET6)
[IP_INTERFACE] = {"interface", PF_INTERNAL},
[IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL},
#endif
[IP_MOUNT] = {"mount", PF_INTERNAL | PF_REV},
[IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL},
[IP_MOUNT_FDESCFS] = {"mount.fdescfs", PF_INTERNAL | PF_BOOL},
[IP_MOUNT_PROCFS] = {"mount.procfs", PF_INTERNAL | PF_BOOL},
[IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL},
[IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT},
[IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL},
#ifdef INET
[IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV},
#endif
#ifdef INET6
[IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV},
#endif
[IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV},
[IP__OP] = {NULL, PF_CONV},
[KP_ALLOW_CHFLAGS] = {"allow.chflags", 0},
[KP_ALLOW_MOUNT] = {"allow.mount", 0},
[KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0},
[KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0},
[KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0},
[KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0},
[KP_DEVFS_RULESET] = {"devfs_ruleset", 0},
[KP_ENFORCE_STATFS] = {"enforce_statfs", 0},
[KP_HOST_HOSTNAME] = {"host.hostname", 0},
#ifdef INET
[KP_IP4_ADDR] = {"ip4.addr", 0},
#endif
#ifdef INET6
[KP_IP6_ADDR] = {"ip6.addr", 0},
#endif
[KP_JID] = {"jid", PF_IMMUTABLE},
[KP_NAME] = {"name", PF_IMMUTABLE},
[KP_PATH] = {"path", 0},
[KP_PERSIST] = {"persist", 0},
[KP_SECURELEVEL] = {"securelevel", 0},
[KP_VNET] = {"vnet", 0},
};
/*
* Parse the jail configuration file.
*/
void
load_config(void)
{
struct cfjails wild;
struct cfparams opp;
struct cfjail *j, *tj, *wj;
struct cfparam *p, *vp, *tp;
struct cfstring *s, *vs, *ns;
struct cfvar *v, *vv;
char *ep;
int did_self, jseq, pgen;
if (!strcmp(cfname, "-")) {
cfname = "STDIN";
yyin = stdin;
} else {
yyin = fopen(cfname, "r");
if (!yyin)
err(1, "%s", cfname);
}
if (yyparse() || yynerrs)
exit(1);
/* Separate the wildcard jails out from the actual jails. */
jseq = 0;
TAILQ_INIT(&wild);
TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) {
j->seq = ++jseq;
if (wild_jail_name(j->name))
requeue(j, &wild);
}
TAILQ_FOREACH(j, &cfjails, tq) {
/* Set aside the jail's parameters. */
TAILQ_INIT(&opp);
TAILQ_CONCAT(&opp, &j->params, tq);
/*
* The jail name implies its "name" or "jid" parameter,
* though they may also be explicitly set later on.
*/
add_param(j, NULL,
strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME,
j->name);
/*
* Collect parameters for the jail, global parameters/variables,
* and any matching wildcard jails.
*/
did_self = 0;
TAILQ_FOREACH(wj, &wild, tq) {
if (j->seq < wj->seq && !did_self) {
TAILQ_FOREACH(p, &opp, tq)
add_param(j, p, 0, NULL);
did_self = 1;
}
if (wild_jail_match(j->name, wj->name))
TAILQ_FOREACH(p, &wj->params, tq)
add_param(j, p, 0, NULL);
}
if (!did_self)
TAILQ_FOREACH(p, &opp, tq)
add_param(j, p, 0, NULL);
/* Resolve any variable substitutions. */
pgen = 0;
TAILQ_FOREACH(p, &j->params, tq) {
p->gen = ++pgen;
find_vars:
TAILQ_FOREACH(s, &p->val, tq) {
while ((v = STAILQ_FIRST(&s->vars))) {
TAILQ_FOREACH(vp, &j->params, tq)
if (!strcmp(vp->name, v->name))
break;
if (!vp) {
jail_warnx(j,
"%s: variable \"%s\" not found",
p->name, v->name);
bad_var:
j->flags |= JF_FAILED;
TAILQ_FOREACH(vp, &j->params, tq)
if (vp->gen == pgen)
vp->flags |= PF_BAD;
goto free_var;
}
if (vp->flags & PF_BAD)
goto bad_var;
if (vp->gen == pgen) {
jail_warnx(j, "%s: variable loop",
v->name);
goto bad_var;
}
TAILQ_FOREACH(vs, &vp->val, tq)
if (!STAILQ_EMPTY(&vs->vars)) {
vp->gen = pgen;
TAILQ_REMOVE(&j->params, vp,
tq);
TAILQ_INSERT_BEFORE(p, vp, tq);
p = vp;
goto find_vars;
}
vs = TAILQ_FIRST(&vp->val);
if (TAILQ_NEXT(vs, tq) != NULL &&
(s->s[0] != '\0' ||
STAILQ_NEXT(v, tq))) {
jail_warnx(j, "%s: array cannot be "
"substituted inline",
p->name);
goto bad_var;
}
s->s = erealloc(s->s, s->len + vs->len + 1);
memmove(s->s + v->pos + vs->len,
s->s + v->pos,
s->len - v->pos + 1);
memcpy(s->s + v->pos, vs->s, vs->len);
vv = v;
while ((vv = STAILQ_NEXT(vv, tq)))
vv->pos += vs->len;
s->len += vs->len;
while ((vs = TAILQ_NEXT(vs, tq))) {
ns = emalloc(sizeof(struct cfstring));
ns->s = estrdup(vs->s);
ns->len = vs->len;
STAILQ_INIT(&ns->vars);
TAILQ_INSERT_AFTER(&p->val, s, ns, tq);
s = ns;
}
free_var:
free(v->name);
STAILQ_REMOVE_HEAD(&s->vars, tq);
free(v);
}
}
}
/* Free the jail's original parameter list and any variables. */
while ((p = TAILQ_FIRST(&opp)))
free_param(&opp, p);
TAILQ_FOREACH_SAFE(p, &j->params, tq, tp)
if (p->flags & PF_VAR)
free_param(&j->params, p);
}
while ((wj = TAILQ_FIRST(&wild))) {
free(wj->name);
while ((p = TAILQ_FIRST(&wj->params)))
free_param(&wj->params, p);
TAILQ_REMOVE(&wild, wj, tq);
}
}
/*
* Create a new jail record.
*/
struct cfjail *
add_jail(void)
{
struct cfjail *j;
j = emalloc(sizeof(struct cfjail));
memset(j, 0, sizeof(struct cfjail));
TAILQ_INIT(&j->params);
STAILQ_INIT(&j->dep[DEP_FROM]);
STAILQ_INIT(&j->dep[DEP_TO]);
j->queue = &cfjails;
TAILQ_INSERT_TAIL(&cfjails, j, tq);
return j;
}
/*
* Add a parameter to a jail.
*/
void
add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum,
const char *value)
{
struct cfstrings nss;
struct cfparam *dp, *np;
struct cfstring *s, *ns;
struct cfvar *v, *nv;
const char *name;
char *cs, *tname;
unsigned flags;
if (j == NULL) {
/* Create a single anonymous jail if one doesn't yet exist. */
j = TAILQ_LAST(&cfjails, cfjails);
if (j == NULL)
j = add_jail();
}
TAILQ_INIT(&nss);
if (p != NULL) {
name = p->name;
flags = p->flags;
/*
* Make a copy of the parameter's string list,
* which may be freed if it's overridden later.
*/
TAILQ_FOREACH(s, &p->val, tq) {
ns = emalloc(sizeof(struct cfstring));
ns->s = estrdup(s->s);
ns->len = s->len;
STAILQ_INIT(&ns->vars);
STAILQ_FOREACH(v, &s->vars, tq) {
nv = emalloc(sizeof(struct cfvar));
nv->name = strdup(v->name);
nv->pos = v->pos;
STAILQ_INSERT_TAIL(&ns->vars, nv, tq);
}
TAILQ_INSERT_TAIL(&nss, ns, tq);
}
} else {
flags = PF_APPEND;
if (ipnum != IP__NULL) {
name = intparams[ipnum].name;
flags |= intparams[ipnum].flags;
} else if ((cs = strchr(value, '='))) {
tname = alloca(cs - value + 1);
strlcpy(tname, value, cs - value + 1);
name = tname;
value = cs + 1;
} else {
name = value;
value = NULL;
}
if (value != NULL) {
ns = emalloc(sizeof(struct cfstring));
ns->s = estrdup(value);
ns->len = strlen(value);
STAILQ_INIT(&ns->vars);
TAILQ_INSERT_TAIL(&nss, ns, tq);
}
}
/* See if this parameter has already been added. */
if (ipnum != IP__NULL)
dp = j->intparams[ipnum];
else
TAILQ_FOREACH(dp, &j->params, tq)
if (!(dp->flags & PF_CONV) && equalopts(dp->name, name))
break;
if (dp != NULL) {
/* Found it - append or replace. */
if (dp->flags & PF_IMMUTABLE) {
jail_warnx(j, "cannot redefine variable \"%s\".",
dp->name);
return;
}
if (strcmp(dp->name, name)) {
free(dp->name);
dp->name = estrdup(name);
}
if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss))
free_param_strings(dp);
TAILQ_CONCAT(&dp->val, &nss, tq);
dp->flags |= flags;
} else {
/* Not found - add it. */
np = emalloc(sizeof(struct cfparam));
np->name = estrdup(name);
TAILQ_INIT(&np->val);
TAILQ_CONCAT(&np->val, &nss, tq);
np->flags = flags;
np->gen = 0;
TAILQ_INSERT_TAIL(&j->params, np, tq);
if (ipnum != IP__NULL)
j->intparams[ipnum] = np;
else
for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++)
if (!(intparams[ipnum].flags & PF_CONV) &&
equalopts(name, intparams[ipnum].name)) {
j->intparams[ipnum] = np;
np->flags |= intparams[ipnum].flags;
break;
}
}
}
/*
* Return if a boolean parameter exists and is true.
*/
int
bool_param(const struct cfparam *p)
{
const char *cs;
if (p == NULL)
return 0;
cs = strrchr(p->name, '.');
return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^
(TAILQ_EMPTY(&p->val) ||
!strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") ||
(strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10)));
}
/*
* Set an integer if a parameter if it exists.
*/
int
int_param(const struct cfparam *p, int *ip)
{
if (p == NULL || TAILQ_EMPTY(&p->val))
return 0;
*ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10);
return 1;
}
/*
* Return the string value of a scalar parameter if it exists.
*/
const char *
string_param(const struct cfparam *p)
{
return (p && !TAILQ_EMPTY(&p->val)
? TAILQ_LAST(&p->val, cfstrings)->s : NULL);
}
/*
* Check syntax and values of internal parameters. Set some internal
* parameters based on the values of others.
*/
int
check_intparams(struct cfjail *j)
{
struct cfparam *p;
struct cfstring *s;
FILE *f;
const char *val;
char *cs, *ep, *ln;
size_t lnlen;
int error;
#if defined(INET) || defined(INET6)
struct addrinfo hints;
struct addrinfo *ai0, *ai;
const char *hostname;
int gicode, defif, prefix;
#endif
#ifdef INET
struct in_addr addr4;
int ip4ok;
char avalue4[INET_ADDRSTRLEN];
#endif
#ifdef INET6
struct in6_addr addr6;
int ip6ok;
char avalue6[INET6_ADDRSTRLEN];
#endif
error = 0;
/* Check format of boolan and integer values. */
TAILQ_FOREACH(p, &j->params, tq) {
if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) {
val = TAILQ_LAST(&p->val, cfstrings)->s;
if (p->flags & PF_BOOL) {
if (strcasecmp(val, "false") &&
strcasecmp(val, "true") &&
((void)strtol(val, &ep, 10), *ep)) {
jail_warnx(j,
"%s: unknown boolean value \"%s\"",
p->name, val);
error = -1;
}
} else {
(void)strtol(val, &ep, 10);
if (ep == val || *ep) {
jail_warnx(j,
"%s: non-integer value \"%s\"",
p->name, val);
error = -1;
}
}
}
}
#if defined(INET) || defined(INET6)
/*
* The ip_hostname parameter looks up the hostname, and adds parameters
* for any IP addresses it finds.
*/
if (((j->flags & JF_OP_MASK) != JF_STOP ||
j->intparams[IP_INTERFACE] != NULL) &&
bool_param(j->intparams[IP_IP_HOSTNAME]) &&
(hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) {
j->intparams[IP_IP_HOSTNAME] = NULL;
/*
* Silently ignore unsupported address families from
* DNS lookups.
*/
#ifdef INET
ip4ok = feature_present("inet");
#endif
#ifdef INET6
ip6ok = feature_present("inet6");
#endif
if (
#if defined(INET) && defined(INET6)
ip4ok || ip6ok
#elif defined(INET)
ip4ok
#elif defined(INET6)
ip6ok
#endif
) {
/* Look up the hostname (or get the address) */
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
hints.ai_family =
#if defined(INET) && defined(INET6)
ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6;
#elif defined(INET)
PF_INET;
#elif defined(INET6)
PF_INET6;
#endif
gicode = getaddrinfo(hostname, NULL, &hints, &ai0);
if (gicode != 0) {
jail_warnx(j, "host.hostname %s: %s", hostname,
gai_strerror(gicode));
error = -1;
} else {
/*
* Convert the addresses to ASCII so jailparam
* can convert them back. Errors are not
* expected here.
*/
for (ai = ai0; ai; ai = ai->ai_next)
switch (ai->ai_family) {
#ifdef INET
case AF_INET:
memcpy(&addr4,
&((struct sockaddr_in *)
(void *)ai->ai_addr)->
sin_addr, sizeof(addr4));
if (inet_ntop(AF_INET,
&addr4, avalue4,
INET_ADDRSTRLEN) == NULL)
err(1, "inet_ntop");
add_param(j, NULL, KP_IP4_ADDR,
avalue4);
break;
#endif
#ifdef INET6
case AF_INET6:
memcpy(&addr6,
&((struct sockaddr_in6 *)
(void *)ai->ai_addr)->
sin6_addr, sizeof(addr6));
if (inet_ntop(AF_INET6,
&addr6, avalue6,
INET6_ADDRSTRLEN) == NULL)
err(1, "inet_ntop");
add_param(j, NULL, KP_IP6_ADDR,
avalue6);
break;
#endif
}
freeaddrinfo(ai0);
}
}
}
/*
* IP addresses may include an interface to set that address on,
* a netmask/suffix for that address and options for ifconfig.
* These are copied to an internal command parameter and then stripped
* so they won't be passed on to jailparam_set.
*/
defif = string_param(j->intparams[IP_INTERFACE]) != NULL;
#ifdef INET
if (j->intparams[KP_IP4_ADDR] != NULL) {
TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) {
cs = strchr(s->s, '|');
if (cs || defif)
add_param(j, NULL, IP__IP4_IFADDR, s->s);
if (cs) {
strcpy(s->s, cs + 1);
s->len -= cs + 1 - s->s;
}
if ((cs = strchr(s->s, '/'))) {
prefix = strtol(cs + 1, &ep, 10);
if (*ep == '.'
? inet_pton(AF_INET, cs + 1, &addr4) != 1
: *ep || prefix < 0 || prefix > 32) {
jail_warnx(j,
"ip4.addr: bad netmask \"%s\"", cs);
error = -1;
}
*cs = '\0';
s->len = cs - s->s;
}
if ((cs = strchr(s->s, ' ')) != NULL) {
*cs = '\0';
s->len = cs - s->s;
}
}
}
#endif
#ifdef INET6
if (j->intparams[KP_IP6_ADDR] != NULL) {
TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) {
cs = strchr(s->s, '|');
if (cs || defif)
add_param(j, NULL, IP__IP6_IFADDR, s->s);
if (cs) {
strcpy(s->s, cs + 1);
s->len -= cs + 1 - s->s;
}
if ((cs = strchr(s->s, '/'))) {
prefix = strtol(cs + 1, &ep, 10);
if (*ep || prefix < 0 || prefix > 128) {
jail_warnx(j,
"ip6.addr: bad prefixlen \"%s\"",
cs);
error = -1;
}
*cs = '\0';
s->len = cs - s->s;
}
if ((cs = strchr(s->s, ' ')) != NULL) {
*cs = '\0';
s->len = cs - s->s;
}
}
}
#endif
#endif
/*
* Read mount.fstab file(s), and treat each line as its own mount
* parameter.
*/
if (j->intparams[IP_MOUNT_FSTAB] != NULL) {
TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) {
if (s->len == 0)
continue;
f = fopen(s->s, "r");
if (f == NULL) {
jail_warnx(j, "mount.fstab: %s: %s",
s->s, strerror(errno));
error = -1;
continue;
}
while ((ln = fgetln(f, &lnlen))) {
if ((cs = memchr(ln, '#', lnlen - 1)))
lnlen = cs - ln + 1;
if (ln[lnlen - 1] == '\n' ||
ln[lnlen - 1] == '#')
ln[lnlen - 1] = '\0';
else {
cs = alloca(lnlen + 1);
strlcpy(cs, ln, lnlen + 1);
ln = cs;
}
add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln);
}
fclose(f);
}
}
if (error)
failed(j);
return error;
}
/*
* Import parameters into libjail's binary jailparam format.
*/
int
import_params(struct cfjail *j)
{
struct cfparam *p;
struct cfstring *s, *ts;
struct jailparam *jp;
char *value, *cs;
size_t vallen;
int error;
error = 0;
j->njp = 0;
TAILQ_FOREACH(p, &j->params, tq)
if (!(p->flags & PF_INTERNAL))
j->njp++;
j->jp = jp = emalloc(j->njp * sizeof(struct jailparam));
TAILQ_FOREACH(p, &j->params, tq) {
if (p->flags & PF_INTERNAL)
continue;
if (jailparam_init(jp, p->name) < 0) {
error = -1;
jail_warnx(j, "%s", jail_errmsg);
jp++;
continue;
}
if (TAILQ_EMPTY(&p->val))
value = NULL;
else if (!jp->jp_elemlen ||
!TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) {
/*
* Scalar parameters silently discard multiple (array)
* values, keeping only the last value added. This
* lets values added from the command line append to
* arrays wthout pre-checking the type.
*/
value = TAILQ_LAST(&p->val, cfstrings)->s;
} else {
/*
* Convert arrays into comma-separated strings, which
* jailparam_import will then convert back into arrays.
*/
vallen = 0;
TAILQ_FOREACH(s, &p->val, tq)
vallen += s->len + 1;
value = alloca(vallen);
cs = value;
TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) {
memcpy(cs, s->s, s->len);
cs += s->len + 1;
cs[-1] = ',';
}
value[vallen - 1] = '\0';
}
if (jailparam_import(jp, value) < 0) {
error = -1;
jail_warnx(j, "%s", jail_errmsg);
}
jp++;
}
if (error) {
jailparam_free(j->jp, j->njp);
free(j->jp);
j->jp = NULL;
failed(j);
}
return error;
}
/*
* Check if options are equal (with or without the "no" prefix).
*/
int
equalopts(const char *opt1, const char *opt2)
{
char *p;
/* "opt" vs. "opt" or "noopt" vs. "noopt" */
if (strcmp(opt1, opt2) == 0)
return (1);
/* "noopt" vs. "opt" */
if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
return (1);
/* "opt" vs. "noopt" */
if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
return (1);
while ((p = strchr(opt1, '.')) != NULL &&
!strncmp(opt1, opt2, ++p - opt1)) {
opt2 += p - opt1;
opt1 = p;
/* "foo.noopt" vs. "foo.opt" */
if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0)
return (1);
/* "foo.opt" vs. "foo.noopt" */
if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0)
return (1);
}
return (0);
}
/*
* See if a jail name matches a wildcard.
*/
int
wild_jail_match(const char *jname, const char *wname)
{
const char *jc, *jd, *wc, *wd;
/*
* A non-final "*" component in the wild name matches a single jail
* component, and a final "*" matches one or more jail components.
*/
for (jc = jname, wc = wname;
(jd = strchr(jc, '.')) && (wd = strchr(wc, '.'));
jc = jd + 1, wc = wd + 1)
if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2))
return 0;
return (!strcmp(jc, wc) || !strcmp(wc, "*"));
}
/*
* Return if a jail name is a wildcard.
*/
int
wild_jail_name(const char *wname)
{
const char *wc;
for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*'))
if ((wc == wname || wc[-1] == '.') &&
(wc[1] == '\0' || wc[1] == '.'))
return 1;
return 0;
}
/*
* Free a parameter record and all its strings and variables.
*/
static void
free_param(struct cfparams *pp, struct cfparam *p)
{
free(p->name);
free_param_strings(p);
TAILQ_REMOVE(pp, p, tq);
free(p);
}
static void
free_param_strings(struct cfparam *p)
{
struct cfstring *s;
struct cfvar *v;
while ((s = TAILQ_FIRST(&p->val))) {
free(s->s);
while ((v = STAILQ_FIRST(&s->vars))) {
free(v->name);
STAILQ_REMOVE_HEAD(&s->vars, tq);
free(v);
}
TAILQ_REMOVE(&p->val, s, tq);
free(s);
}
}
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