1/*- 2 * Copyright (c) 2011 James Gritton 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 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/types.h> 31#include <sys/errno.h> 32#include <sys/socket.h> 33#include <sys/sysctl.h> 34 35#include <arpa/inet.h> 36#include <netinet/in.h> 37 38#include <err.h> 39#include <netdb.h> 40#include <stdio.h> 41#include <stdlib.h> 42#include <string.h> 43#include <unistd.h> 44 45#include "jailp.h" 46 47struct ipspec { 48 const char *name; 49 unsigned flags; 50}; 51 52extern FILE *yyin; 53extern int yynerrs; 54 55extern int yyparse(void); 56 57struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails); 58 59static void free_param(struct cfparams *pp, struct cfparam *p); 60static void free_param_strings(struct cfparam *p); 61 62static const struct ipspec intparams[] = { 63 [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL}, 64 [IP_COMMAND] = {"command", PF_INTERNAL}, 65 [IP_DEPEND] = {"depend", PF_INTERNAL}, 66 [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL}, 67 [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL}, 68 [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT}, 69 [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL}, 70 [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL}, 71 [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL}, 72 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL}, 73 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL}, 74 [IP_EXEC_START] = {"exec.start", PF_INTERNAL}, 75 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL}, 76 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user", 77 PF_INTERNAL | PF_BOOL}, 78 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL}, 79 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT}, 80#if defined(INET) || defined(INET6) 81 [IP_INTERFACE] = {"interface", PF_INTERNAL}, 82 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL}, 83#endif 84 [IP_MOUNT] = {"mount", PF_INTERNAL | PF_REV}, 85 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL}, 86 [IP_MOUNT_FDESCFS] = {"mount.fdescfs", PF_INTERNAL | PF_BOOL}, 87 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL}, 88 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT}, 89 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL}, 90#ifdef INET 91 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV}, 92#endif 93#ifdef INET6 94 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV}, 95#endif 96 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV}, 97 [IP__OP] = {NULL, PF_CONV}, 98 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0}, 99 [KP_ALLOW_MOUNT] = {"allow.mount", 0}, 100 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0}, 101 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0}, 102 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0}, 103 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0}, 104 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0}, 105 [KP_ENFORCE_STATFS] = {"enforce_statfs", 0}, 106 [KP_HOST_HOSTNAME] = {"host.hostname", 0}, 107#ifdef INET 108 [KP_IP4_ADDR] = {"ip4.addr", 0}, 109#endif 110#ifdef INET6 111 [KP_IP6_ADDR] = {"ip6.addr", 0}, 112#endif 113 [KP_JID] = {"jid", 0}, 114 [KP_NAME] = {"name", 0}, 115 [KP_PATH] = {"path", 0}, 116 [KP_PERSIST] = {"persist", 0}, 117 [KP_SECURELEVEL] = {"securelevel", 0}, 118 [KP_VNET] = {"vnet", 0}, 119}; 120 121/* 122 * Parse the jail configuration file. 123 */ 124void 125load_config(void) 126{ 127 struct cfjails wild; 128 struct cfparams opp; 129 struct cfjail *j, *tj, *wj; 130 struct cfparam *p, *vp, *tp; 131 struct cfstring *s, *vs, *ns; 132 struct cfvar *v; 133 char *ep; 134 size_t varoff; 135 int did_self, jseq, pgen; 136 137 if (!strcmp(cfname, "-")) { 138 cfname = "STDIN"; 139 yyin = stdin; 140 } else { 141 yyin = fopen(cfname, "r"); 142 if (!yyin) 143 err(1, "%s", cfname); 144 } 145 if (yyparse() || yynerrs) 146 exit(1); 147 148 /* Separate the wildcard jails out from the actual jails. */ 149 jseq = 0; 150 TAILQ_INIT(&wild); 151 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 152 j->seq = ++jseq; 153 if (wild_jail_name(j->name)) 154 requeue(j, &wild); 155 } 156 157 TAILQ_FOREACH(j, &cfjails, tq) { 158 /* Set aside the jail's parameters. */ 159 TAILQ_INIT(&opp); 160 TAILQ_CONCAT(&opp, &j->params, tq); 161 /* 162 * The jail name implies its "name" or "jid" parameter, 163 * though they may also be explicitly set later on. 164 */ 165 add_param(j, NULL, 166 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 167 j->name); 168 /* 169 * Collect parameters for the jail, global parameters/variables, 170 * and any matching wildcard jails. 171 */ 172 did_self = 0; 173 TAILQ_FOREACH(wj, &wild, tq) { 174 if (j->seq < wj->seq && !did_self) { 175 TAILQ_FOREACH(p, &opp, tq) 176 add_param(j, p, 0, NULL); 177 did_self = 1; 178 } 179 if (wild_jail_match(j->name, wj->name)) 180 TAILQ_FOREACH(p, &wj->params, tq) 181 add_param(j, p, 0, NULL); 182 } 183 if (!did_self) 184 TAILQ_FOREACH(p, &opp, tq) 185 add_param(j, p, 0, NULL); 186 187 /* Resolve any variable substitutions. */ 188 pgen = 0; 189 TAILQ_FOREACH(p, &j->params, tq) { 190 p->gen = ++pgen; 191 find_vars: 192 TAILQ_FOREACH(s, &p->val, tq) { 193 varoff = 0; 194 while ((v = STAILQ_FIRST(&s->vars))) { 195 TAILQ_FOREACH(vp, &j->params, tq) 196 if (!strcmp(vp->name, v->name)) 197 break; 198 if (!vp) { 199 jail_warnx(j, 200 "%s: variable \"%s\" not found", 201 p->name, v->name); 202 bad_var: 203 j->flags |= JF_FAILED; 204 TAILQ_FOREACH(vp, &j->params, tq) 205 if (vp->gen == pgen) 206 vp->flags |= PF_BAD; 207 goto free_var; 208 } 209 if (vp->flags & PF_BAD) 210 goto bad_var; 211 if (vp->gen == pgen) { 212 jail_warnx(j, "%s: variable loop", 213 v->name); 214 goto bad_var; 215 } 216 TAILQ_FOREACH(vs, &vp->val, tq) 217 if (!STAILQ_EMPTY(&vs->vars)) { 218 vp->gen = pgen; 219 TAILQ_REMOVE(&j->params, vp, 220 tq); 221 TAILQ_INSERT_BEFORE(p, vp, tq); 222 p = vp; 223 goto find_vars; 224 } 225 vs = TAILQ_FIRST(&vp->val); 226 if (TAILQ_NEXT(vs, tq) != NULL && 227 (s->s[0] != '\0' || 228 STAILQ_NEXT(v, tq))) { 229 jail_warnx(j, "%s: array cannot be " 230 "substituted inline", 231 p->name); 232 goto bad_var; 233 } 234 s->s = erealloc(s->s, s->len + vs->len + 1); 235 memmove(s->s + v->pos + varoff + vs->len, 236 s->s + v->pos + varoff, 237 s->len - (v->pos + varoff) + 1); 238 memcpy(s->s + v->pos + varoff, vs->s, vs->len); 239 varoff += vs->len; 240 s->len += vs->len; 241 while ((vs = TAILQ_NEXT(vs, tq))) { 242 ns = emalloc(sizeof(struct cfstring)); 243 ns->s = estrdup(vs->s); 244 ns->len = vs->len; 245 STAILQ_INIT(&ns->vars); 246 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 247 s = ns; 248 } 249 free_var: 250 free(v->name); 251 STAILQ_REMOVE_HEAD(&s->vars, tq); 252 free(v); 253 } 254 } 255 } 256 257 /* Free the jail's original parameter list and any variables. */ 258 while ((p = TAILQ_FIRST(&opp))) 259 free_param(&opp, p); 260 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 261 if (p->flags & PF_VAR) 262 free_param(&j->params, p); 263 } 264 while ((wj = TAILQ_FIRST(&wild))) { 265 free(wj->name); 266 while ((p = TAILQ_FIRST(&wj->params))) 267 free_param(&wj->params, p); 268 TAILQ_REMOVE(&wild, wj, tq); 269 } 270} 271 272/* 273 * Create a new jail record. 274 */ 275struct cfjail * 276add_jail(void) 277{ 278 struct cfjail *j; 279 280 j = emalloc(sizeof(struct cfjail)); 281 memset(j, 0, sizeof(struct cfjail)); 282 TAILQ_INIT(&j->params); 283 STAILQ_INIT(&j->dep[DEP_FROM]); 284 STAILQ_INIT(&j->dep[DEP_TO]); 285 j->queue = &cfjails; 286 TAILQ_INSERT_TAIL(&cfjails, j, tq); 287 return j; 288} 289 290/* 291 * Add a parameter to a jail. 292 */ 293void 294add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 295 const char *value) 296{ 297 struct cfstrings nss; 298 struct cfparam *dp, *np; 299 struct cfstring *s, *ns; 300 struct cfvar *v, *nv; 301 const char *name; 302 char *cs, *tname; 303 unsigned flags; 304 305 if (j == NULL) { 306 /* Create a single anonymous jail if one doesn't yet exist. */ 307 j = TAILQ_LAST(&cfjails, cfjails); 308 if (j == NULL) 309 j = add_jail(); 310 } 311 TAILQ_INIT(&nss); 312 if (p != NULL) { 313 name = p->name; 314 flags = p->flags; 315 /* 316 * Make a copy of the parameter's string list, 317 * which may be freed if it's overridden later. 318 */ 319 TAILQ_FOREACH(s, &p->val, tq) { 320 ns = emalloc(sizeof(struct cfstring)); 321 ns->s = estrdup(s->s); 322 ns->len = s->len; 323 STAILQ_INIT(&ns->vars); 324 STAILQ_FOREACH(v, &s->vars, tq) { 325 nv = emalloc(sizeof(struct cfvar)); 326 nv->name = strdup(v->name); 327 nv->pos = v->pos; 328 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 329 } 330 TAILQ_INSERT_TAIL(&nss, ns, tq); 331 } 332 } else { 333 flags = PF_APPEND; 334 if (ipnum != IP__NULL) { 335 name = intparams[ipnum].name; 336 flags |= intparams[ipnum].flags; 337 } else if ((cs = strchr(value, '='))) { 338 tname = alloca(cs - value + 1); 339 strlcpy(tname, value, cs - value + 1); 340 name = tname; 341 value = cs + 1; 342 } else { 343 name = value; 344 value = NULL; 345 } 346 if (value != NULL) { 347 ns = emalloc(sizeof(struct cfstring)); 348 ns->s = estrdup(value); 349 ns->len = strlen(value); 350 STAILQ_INIT(&ns->vars); 351 TAILQ_INSERT_TAIL(&nss, ns, tq); 352 } 353 } 354 355 /* See if this parameter has already been added. */ 356 if (ipnum != IP__NULL) 357 dp = j->intparams[ipnum]; 358 else 359 TAILQ_FOREACH(dp, &j->params, tq) 360 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 361 break; 362 if (dp != NULL) { 363 /* Found it - append or replace. */ 364 if (strcmp(dp->name, name)) { 365 free(dp->name); 366 dp->name = estrdup(name); 367 } 368 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 369 free_param_strings(dp); 370 TAILQ_CONCAT(&dp->val, &nss, tq); 371 dp->flags |= flags; 372 } else { 373 /* Not found - add it. */ 374 np = emalloc(sizeof(struct cfparam)); 375 np->name = estrdup(name); 376 TAILQ_INIT(&np->val); 377 TAILQ_CONCAT(&np->val, &nss, tq); 378 np->flags = flags; 379 np->gen = 0; 380 TAILQ_INSERT_TAIL(&j->params, np, tq); 381 if (ipnum != IP__NULL) 382 j->intparams[ipnum] = np; 383 else 384 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++) 385 if (!(intparams[ipnum].flags & PF_CONV) && 386 equalopts(name, intparams[ipnum].name)) { 387 j->intparams[ipnum] = np; 388 np->flags |= intparams[ipnum].flags; 389 break; 390 } 391 } 392} 393 394/* 395 * Return if a boolean parameter exists and is true. 396 */ 397int 398bool_param(const struct cfparam *p) 399{ 400 const char *cs; 401 402 if (p == NULL) 403 return 0; 404 cs = strrchr(p->name, '.'); 405 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 406 (TAILQ_EMPTY(&p->val) || 407 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 408 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 409} 410 411/* 412 * Set an integer if a parameter if it exists. 413 */ 414int 415int_param(const struct cfparam *p, int *ip) 416{ 417 if (p == NULL || TAILQ_EMPTY(&p->val)) 418 return 0; 419 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 420 return 1; 421} 422 423/* 424 * Return the string value of a scalar parameter if it exists. 425 */ 426const char * 427string_param(const struct cfparam *p) 428{ 429 return (p && !TAILQ_EMPTY(&p->val) 430 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 431} 432 433/* 434 * Check syntax and values of internal parameters. Set some internal 435 * parameters based on the values of others. 436 */ 437int 438check_intparams(struct cfjail *j) 439{ 440 struct cfparam *p; 441 struct cfstring *s; 442 FILE *f; 443 const char *val; 444 char *cs, *ep, *ln; 445 size_t lnlen; 446 int error; 447#if defined(INET) || defined(INET6) 448 struct addrinfo hints; 449 struct addrinfo *ai0, *ai; 450 const char *hostname; 451 int gicode, defif, prefix; 452#endif 453#ifdef INET 454 struct in_addr addr4; 455 int ip4ok; 456 char avalue4[INET_ADDRSTRLEN]; 457#endif 458#ifdef INET6 459 struct in6_addr addr6; 460 int ip6ok; 461 char avalue6[INET6_ADDRSTRLEN]; 462#endif 463 464 error = 0; 465 /* Check format of boolan and integer values. */ 466 TAILQ_FOREACH(p, &j->params, tq) { 467 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 468 val = TAILQ_LAST(&p->val, cfstrings)->s; 469 if (p->flags & PF_BOOL) { 470 if (strcasecmp(val, "false") && 471 strcasecmp(val, "true") && 472 ((void)strtol(val, &ep, 10), *ep)) { 473 jail_warnx(j, 474 "%s: unknown boolean value \"%s\"", 475 p->name, val); 476 error = -1; 477 } 478 } else { 479 (void)strtol(val, &ep, 10); 480 if (ep == val || *ep) { 481 jail_warnx(j, 482 "%s: non-integer value \"%s\"", 483 p->name, val); 484 error = -1; 485 } 486 } 487 } 488 } 489 490#if defined(INET) || defined(INET6) 491 /* 492 * The ip_hostname parameter looks up the hostname, and adds parameters 493 * for any IP addresses it finds. 494 */ 495 if (((j->flags & JF_OP_MASK) != JF_STOP || 496 j->intparams[IP_INTERFACE] != NULL) && 497 bool_param(j->intparams[IP_IP_HOSTNAME]) && 498 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 499 j->intparams[IP_IP_HOSTNAME] = NULL; 500 /* 501 * Silently ignore unsupported address families from 502 * DNS lookups. 503 */ 504#ifdef INET 505 ip4ok = feature_present("inet"); 506#endif 507#ifdef INET6 508 ip6ok = feature_present("inet6"); 509#endif 510 if ( 511#if defined(INET) && defined(INET6) 512 ip4ok || ip6ok 513#elif defined(INET) 514 ip4ok 515#elif defined(INET6) 516 ip6ok 517#endif 518 ) { 519 /* Look up the hostname (or get the address) */ 520 memset(&hints, 0, sizeof(hints)); 521 hints.ai_socktype = SOCK_STREAM; 522 hints.ai_family = 523#if defined(INET) && defined(INET6) 524 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6; 525#elif defined(INET) 526 PF_INET; 527#elif defined(INET6) 528 PF_INET6; 529#endif 530 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 531 if (gicode != 0) { 532 jail_warnx(j, "host.hostname %s: %s", hostname, 533 gai_strerror(gicode)); 534 error = -1; 535 } else { 536 /* 537 * Convert the addresses to ASCII so jailparam 538 * can convert them back. Errors are not 539 * expected here. 540 */ 541 for (ai = ai0; ai; ai = ai->ai_next) 542 switch (ai->ai_family) { 543#ifdef INET 544 case AF_INET: 545 memcpy(&addr4, 546 &((struct sockaddr_in *) 547 (void *)ai->ai_addr)-> 548 sin_addr, sizeof(addr4)); 549 if (inet_ntop(AF_INET, 550 &addr4, avalue4, 551 INET_ADDRSTRLEN) == NULL) 552 err(1, "inet_ntop"); 553 add_param(j, NULL, KP_IP4_ADDR, 554 avalue4); 555 break; 556#endif 557#ifdef INET6 558 case AF_INET6: 559 memcpy(&addr6, 560 &((struct sockaddr_in6 *) 561 (void *)ai->ai_addr)-> 562 sin6_addr, sizeof(addr6)); 563 if (inet_ntop(AF_INET6, 564 &addr6, avalue6, 565 INET6_ADDRSTRLEN) == NULL) 566 err(1, "inet_ntop"); 567 add_param(j, NULL, KP_IP6_ADDR, 568 avalue6); 569 break; 570#endif 571 } 572 freeaddrinfo(ai0); 573 } 574 } 575 } 576 577 /* 578 * IP addresses may include an interface to set that address on, 579 * a netmask/suffix for that address and options for ifconfig. 580 * These are copied to an internal command parameter and then stripped 581 * so they won't be passed on to jailparam_set. 582 */ 583 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 584#ifdef INET 585 if (j->intparams[KP_IP4_ADDR] != NULL) { 586 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 587 cs = strchr(s->s, '|'); 588 if (cs || defif) 589 add_param(j, NULL, IP__IP4_IFADDR, s->s); 590 if (cs) { 591 strcpy(s->s, cs + 1); 592 s->len -= cs + 1 - s->s; 593 } 594 if ((cs = strchr(s->s, '/'))) { 595 prefix = strtol(cs + 1, &ep, 10); 596 if (*ep == '.' 597 ? inet_pton(AF_INET, cs + 1, &addr4) != 1 598 : *ep || prefix < 0 || prefix > 32) { 599 jail_warnx(j, 600 "ip4.addr: bad netmask \"%s\"", cs); 601 error = -1; 602 } 603 *cs = '\0'; 604 s->len = cs - s->s; 605 } 606 if ((cs = strchr(s->s, ' ')) != NULL) { 607 *cs = '\0'; 608 s->len = cs - s->s; 609 } 610 } 611 } 612#endif 613#ifdef INET6 614 if (j->intparams[KP_IP6_ADDR] != NULL) { 615 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 616 cs = strchr(s->s, '|'); 617 if (cs || defif) 618 add_param(j, NULL, IP__IP6_IFADDR, s->s); 619 if (cs) { 620 strcpy(s->s, cs + 1); 621 s->len -= cs + 1 - s->s; 622 } 623 if ((cs = strchr(s->s, '/'))) { 624 prefix = strtol(cs + 1, &ep, 10); 625 if (*ep || prefix < 0 || prefix > 128) { 626 jail_warnx(j, 627 "ip6.addr: bad prefixlen \"%s\"", 628 cs); 629 error = -1; 630 } 631 *cs = '\0'; 632 s->len = cs - s->s; 633 } 634 if ((cs = strchr(s->s, ' ')) != NULL) { 635 *cs = '\0'; 636 s->len = cs - s->s; 637 } 638 } 639 } 640#endif 641#endif 642 643 /* 644 * Read mount.fstab file(s), and treat each line as its own mount 645 * parameter. 646 */ 647 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 648 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 649 if (s->len == 0) 650 continue; 651 f = fopen(s->s, "r"); 652 if (f == NULL) { 653 jail_warnx(j, "mount.fstab: %s: %s", 654 s->s, strerror(errno)); 655 error = -1; 656 continue; 657 } 658 while ((ln = fgetln(f, &lnlen))) { 659 if ((cs = memchr(ln, '#', lnlen - 1))) 660 lnlen = cs - ln + 1; 661 if (ln[lnlen - 1] == '\n' || 662 ln[lnlen - 1] == '#') 663 ln[lnlen - 1] = '\0'; 664 else { 665 cs = alloca(lnlen + 1); 666 strlcpy(cs, ln, lnlen + 1); 667 ln = cs; 668 } 669 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 670 } 671 fclose(f); 672 } 673 } 674 if (error) 675 failed(j); 676 return error; 677} 678 679/* 680 * Import parameters into libjail's binary jailparam format. 681 */ 682int 683import_params(struct cfjail *j) 684{ 685 struct cfparam *p; 686 struct cfstring *s, *ts; 687 struct jailparam *jp; 688 char *value, *cs; 689 size_t vallen; 690 int error; 691 692 error = 0; 693 j->njp = 0; 694 TAILQ_FOREACH(p, &j->params, tq) 695 if (!(p->flags & PF_INTERNAL)) 696 j->njp++; 697 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 698 TAILQ_FOREACH(p, &j->params, tq) { 699 if (p->flags & PF_INTERNAL) 700 continue; 701 if (jailparam_init(jp, p->name) < 0) { 702 error = -1; 703 jail_warnx(j, "%s", jail_errmsg); 704 jp++; 705 continue; 706 } 707 if (TAILQ_EMPTY(&p->val)) 708 value = NULL; 709 else if (!jp->jp_elemlen || 710 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 711 /* 712 * Scalar parameters silently discard multiple (array) 713 * values, keeping only the last value added. This 714 * lets values added from the command line append to 715 * arrays wthout pre-checking the type. 716 */ 717 value = TAILQ_LAST(&p->val, cfstrings)->s; 718 } else { 719 /* 720 * Convert arrays into comma-separated strings, which 721 * jailparam_import will then convert back into arrays. 722 */ 723 vallen = 0; 724 TAILQ_FOREACH(s, &p->val, tq) 725 vallen += s->len + 1; 726 value = alloca(vallen); 727 cs = value; 728 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 729 memcpy(cs, s->s, s->len); 730 cs += s->len + 1; 731 cs[-1] = ','; 732 } 733 value[vallen - 1] = '\0'; 734 } 735 if (jailparam_import(jp, value) < 0) { 736 error = -1; 737 jail_warnx(j, "%s", jail_errmsg); 738 } 739 jp++; 740 } 741 if (error) { 742 jailparam_free(j->jp, j->njp); 743 free(j->jp); 744 j->jp = NULL; 745 failed(j); 746 } 747 return error; 748} 749 750/* 751 * Check if options are equal (with or without the "no" prefix). 752 */ 753int 754equalopts(const char *opt1, const char *opt2) 755{ 756 char *p; 757 758 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 759 if (strcmp(opt1, opt2) == 0) 760 return (1); 761 /* "noopt" vs. "opt" */ 762 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 763 return (1); 764 /* "opt" vs. "noopt" */ 765 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 766 return (1); 767 while ((p = strchr(opt1, '.')) != NULL && 768 !strncmp(opt1, opt2, ++p - opt1)) { 769 opt2 += p - opt1; 770 opt1 = p; 771 /* "foo.noopt" vs. "foo.opt" */ 772 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 773 return (1); 774 /* "foo.opt" vs. "foo.noopt" */ 775 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 776 return (1); 777 } 778 return (0); 779} 780 781/* 782 * See if a jail name matches a wildcard. 783 */ 784int 785wild_jail_match(const char *jname, const char *wname) 786{ 787 const char *jc, *jd, *wc, *wd; 788 789 /* 790 * A non-final "*" component in the wild name matches a single jail 791 * component, and a final "*" matches one or more jail components. 792 */ 793 for (jc = jname, wc = wname; 794 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 795 jc = jd + 1, wc = wd + 1) 796 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 797 return 0; 798 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 799} 800 801/* 802 * Return if a jail name is a wildcard. 803 */ 804int 805wild_jail_name(const char *wname) 806{ 807 const char *wc; 808 809 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 810 if ((wc == wname || wc[-1] == '.') && 811 (wc[1] == '\0' || wc[1] == '.')) 812 return 1; 813 return 0; 814} 815 816/* 817 * Free a parameter record and all its strings and variables. 818 */ 819static void 820free_param(struct cfparams *pp, struct cfparam *p) 821{ 822 free(p->name); 823 free_param_strings(p); 824 TAILQ_REMOVE(pp, p, tq); 825 free(p); 826} 827 828static void 829free_param_strings(struct cfparam *p) 830{ 831 struct cfstring *s; 832 struct cfvar *v; 833 834 while ((s = TAILQ_FIRST(&p->val))) { 835 free(s->s); 836 while ((v = STAILQ_FIRST(&s->vars))) { 837 free(v->name); 838 STAILQ_REMOVE_HEAD(&s->vars, tq); 839 free(v); 840 } 841 TAILQ_REMOVE(&p->val, s, tq); 842 free(s); 843 } 844} 845