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 47 struct ipspec { 48 const char *name; 49 unsigned flags; 50 }; 51 52 extern FILE *yyin; 53 extern int yynerrs; 54 55 extern int yyparse(void); 56 57 struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails); 58 59 static void free_param(struct cfparams *pp, struct cfparam *p); 60 static void free_param_strings(struct cfparam *p); 61 62 static 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 */ 124 void 125 load_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 */ 275 struct cfjail * 276 add_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 */ 293 void 294 add_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 */ 397 int 398 bool_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 */ 414 int 415 int_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 */ 426 const char * 427 string_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 */ 437 int 438 check_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 * and a netmask/suffix for that address. 580 */ 581 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 582 #ifdef INET 583 if (j->intparams[KP_IP4_ADDR] != NULL) { 584 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 585 cs = strchr(s->s, '|'); 586 if (cs || defif) 587 add_param(j, NULL, IP__IP4_IFADDR, s->s); 588 if (cs) { 589 strcpy(s->s, cs + 1); 590 s->len -= cs + 1 - s->s; 591 } 592 if ((cs = strchr(s->s, '/'))) { 593 prefix = strtol(cs + 1, &ep, 10); 594 if (*ep == '.' 595 ? inet_pton(AF_INET, cs + 1, &addr4) != 1 596 : *ep || prefix < 0 || prefix > 32) { 597 jail_warnx(j, 598 "ip4.addr: bad netmask \"%s\"", cs); 599 error = -1; 600 } 601 *cs = '\0'; 602 s->len = cs - s->s; 603 } 604 } 605 } 606 #endif 607 #ifdef INET6 608 if (j->intparams[KP_IP6_ADDR] != NULL) { 609 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 610 cs = strchr(s->s, '|'); 611 if (cs || defif) 612 add_param(j, NULL, IP__IP6_IFADDR, s->s); 613 if (cs) { 614 strcpy(s->s, cs + 1); 615 s->len -= cs + 1 - s->s; 616 } 617 if ((cs = strchr(s->s, '/'))) { 618 prefix = strtol(cs + 1, &ep, 10); 619 if (*ep || prefix < 0 || prefix > 128) { 620 jail_warnx(j, 621 "ip6.addr: bad prefixlen \"%s\"", 622 cs); 623 error = -1; 624 } 625 *cs = '\0'; 626 s->len = cs - s->s; 627 } 628 } 629 } 630 #endif 631 #endif 632 633 /* 634 * Read mount.fstab file(s), and treat each line as its own mount 635 * parameter. 636 */ 637 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 638 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 639 if (s->len == 0) 640 continue; 641 f = fopen(s->s, "r"); 642 if (f == NULL) { 643 jail_warnx(j, "mount.fstab: %s: %s", 644 s->s, strerror(errno)); 645 error = -1; 646 continue; 647 } 648 while ((ln = fgetln(f, &lnlen))) { 649 if ((cs = memchr(ln, '#', lnlen - 1))) 650 lnlen = cs - ln + 1; 651 if (ln[lnlen - 1] == '\n' || 652 ln[lnlen - 1] == '#') 653 ln[lnlen - 1] = '\0'; 654 else { 655 cs = alloca(lnlen + 1); 656 strlcpy(cs, ln, lnlen + 1); 657 ln = cs; 658 } 659 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 660 } 661 fclose(f); 662 } 663 } 664 if (error) 665 failed(j); 666 return error; 667 } 668 669 /* 670 * Import parameters into libjail's binary jailparam format. 671 */ 672 int 673 import_params(struct cfjail *j) 674 { 675 struct cfparam *p; 676 struct cfstring *s, *ts; 677 struct jailparam *jp; 678 char *value, *cs; 679 size_t vallen; 680 int error; 681 682 error = 0; 683 j->njp = 0; 684 TAILQ_FOREACH(p, &j->params, tq) 685 if (!(p->flags & PF_INTERNAL)) 686 j->njp++; 687 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 688 TAILQ_FOREACH(p, &j->params, tq) { 689 if (p->flags & PF_INTERNAL) 690 continue; 691 if (jailparam_init(jp, p->name) < 0) { 692 error = -1; 693 jail_warnx(j, "%s", jail_errmsg); 694 jp++; 695 continue; 696 } 697 if (TAILQ_EMPTY(&p->val)) 698 value = NULL; 699 else if (!jp->jp_elemlen || 700 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 701 /* 702 * Scalar parameters silently discard multiple (array) 703 * values, keeping only the last value added. This 704 * lets values added from the command line append to 705 * arrays wthout pre-checking the type. 706 */ 707 value = TAILQ_LAST(&p->val, cfstrings)->s; 708 } else { 709 /* 710 * Convert arrays into comma-separated strings, which 711 * jailparam_import will then convert back into arrays. 712 */ 713 vallen = 0; 714 TAILQ_FOREACH(s, &p->val, tq) 715 vallen += s->len + 1; 716 value = alloca(vallen); 717 cs = value; 718 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 719 memcpy(cs, s->s, s->len); 720 cs += s->len + 1; 721 cs[-1] = ','; 722 } 723 value[vallen - 1] = '\0'; 724 } 725 if (jailparam_import(jp, value) < 0) { 726 error = -1; 727 jail_warnx(j, "%s", jail_errmsg); 728 } 729 jp++; 730 } 731 if (error) { 732 jailparam_free(j->jp, j->njp); 733 free(j->jp); 734 j->jp = NULL; 735 failed(j); 736 } 737 return error; 738 } 739 740 /* 741 * Check if options are equal (with or without the "no" prefix). 742 */ 743 int 744 equalopts(const char *opt1, const char *opt2) 745 { 746 char *p; 747 748 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 749 if (strcmp(opt1, opt2) == 0) 750 return (1); 751 /* "noopt" vs. "opt" */ 752 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 753 return (1); 754 /* "opt" vs. "noopt" */ 755 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 756 return (1); 757 while ((p = strchr(opt1, '.')) != NULL && 758 !strncmp(opt1, opt2, ++p - opt1)) { 759 opt2 += p - opt1; 760 opt1 = p; 761 /* "foo.noopt" vs. "foo.opt" */ 762 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 763 return (1); 764 /* "foo.opt" vs. "foo.noopt" */ 765 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 766 return (1); 767 } 768 return (0); 769 } 770 771 /* 772 * See if a jail name matches a wildcard. 773 */ 774 int 775 wild_jail_match(const char *jname, const char *wname) 776 { 777 const char *jc, *jd, *wc, *wd; 778 779 /* 780 * A non-final "*" component in the wild name matches a single jail 781 * component, and a final "*" matches one or more jail components. 782 */ 783 for (jc = jname, wc = wname; 784 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 785 jc = jd + 1, wc = wd + 1) 786 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 787 return 0; 788 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 789 } 790 791 /* 792 * Return if a jail name is a wildcard. 793 */ 794 int 795 wild_jail_name(const char *wname) 796 { 797 const char *wc; 798 799 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 800 if ((wc == wname || wc[-1] == '.') && 801 (wc[1] == '\0' || wc[1] == '.')) 802 return 1; 803 return 0; 804 } 805 806 /* 807 * Free a parameter record and all its strings and variables. 808 */ 809 static void 810 free_param(struct cfparams *pp, struct cfparam *p) 811 { 812 free(p->name); 813 free_param_strings(p); 814 TAILQ_REMOVE(pp, p, tq); 815 free(p); 816 } 817 818 static void 819 free_param_strings(struct cfparam *p) 820 { 821 struct cfstring *s; 822 struct cfvar *v; 823 824 while ((s = TAILQ_FIRST(&p->val))) { 825 free(s->s); 826 while ((v = STAILQ_FIRST(&s->vars))) { 827 free(v->name); 828 STAILQ_REMOVE_HEAD(&s->vars, tq); 829 free(v); 830 } 831 TAILQ_REMOVE(&p->val, s, tq); 832 free(s); 833 } 834 } 835