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