1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 James Gritton 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include <sys/errno.h> 34 #include <sys/socket.h> 35 #include <sys/sysctl.h> 36 37 #include <arpa/inet.h> 38 #include <netinet/in.h> 39 40 #include <err.h> 41 #include <netdb.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include "jailp.h" 48 49 struct ipspec { 50 const char *name; 51 unsigned flags; 52 }; 53 54 extern FILE *yyin; 55 extern int yynerrs; 56 57 extern int yyparse(void); 58 59 struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails); 60 61 static void free_param(struct cfparams *pp, struct cfparam *p); 62 static void free_param_strings(struct cfparam *p); 63 64 static const struct ipspec intparams[] = { 65 [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL}, 66 [IP_COMMAND] = {"command", PF_INTERNAL}, 67 [IP_DEPEND] = {"depend", PF_INTERNAL}, 68 [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL}, 69 [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL}, 70 [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT}, 71 [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL}, 72 [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL}, 73 [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL}, 74 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL}, 75 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL}, 76 [IP_EXEC_CREATED] = {"exec.created", PF_INTERNAL}, 77 [IP_EXEC_START] = {"exec.start", PF_INTERNAL}, 78 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL}, 79 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user", 80 PF_INTERNAL | PF_BOOL}, 81 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL}, 82 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT}, 83 #if defined(INET) || defined(INET6) 84 [IP_INTERFACE] = {"interface", PF_INTERNAL}, 85 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL}, 86 #endif 87 [IP_MOUNT] = {"mount", PF_INTERNAL | PF_REV}, 88 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL}, 89 [IP_MOUNT_FDESCFS] = {"mount.fdescfs", PF_INTERNAL | PF_BOOL}, 90 [IP_MOUNT_PROCFS] = {"mount.procfs", PF_INTERNAL | PF_BOOL}, 91 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL}, 92 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT}, 93 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL}, 94 #ifdef INET 95 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV | PF_REV}, 96 #endif 97 #ifdef INET6 98 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV | PF_REV}, 99 #endif 100 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV | PF_REV}, 101 [IP__OP] = {NULL, PF_CONV}, 102 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0}, 103 [KP_ALLOW_MOUNT] = {"allow.mount", 0}, 104 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0}, 105 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0}, 106 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0}, 107 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0}, 108 [KP_DEVFS_RULESET] = {"devfs_ruleset", 0}, 109 [KP_ENFORCE_STATFS] = {"enforce_statfs", 0}, 110 [KP_HOST_HOSTNAME] = {"host.hostname", 0}, 111 #ifdef INET 112 [KP_IP4_ADDR] = {"ip4.addr", 0}, 113 #endif 114 #ifdef INET6 115 [KP_IP6_ADDR] = {"ip6.addr", 0}, 116 #endif 117 [KP_JID] = {"jid", PF_IMMUTABLE}, 118 [KP_NAME] = {"name", PF_IMMUTABLE}, 119 [KP_PATH] = {"path", 0}, 120 [KP_PERSIST] = {"persist", 0}, 121 [KP_SECURELEVEL] = {"securelevel", 0}, 122 [KP_VNET] = {"vnet", 0}, 123 }; 124 125 /* 126 * Parse the jail configuration file. 127 */ 128 void 129 load_config(void) 130 { 131 struct cfjails wild; 132 struct cfparams opp; 133 struct cfjail *j, *tj, *wj; 134 struct cfparam *p, *vp, *tp; 135 struct cfstring *s, *vs, *ns; 136 struct cfvar *v, *vv; 137 char *ep; 138 int did_self, jseq, pgen; 139 140 if (!strcmp(cfname, "-")) { 141 cfname = "STDIN"; 142 yyin = stdin; 143 } else { 144 yyin = fopen(cfname, "r"); 145 if (!yyin) 146 err(1, "%s", cfname); 147 } 148 if (yyparse() || yynerrs) 149 exit(1); 150 151 /* Separate the wildcard jails out from the actual jails. */ 152 jseq = 0; 153 TAILQ_INIT(&wild); 154 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 155 j->seq = ++jseq; 156 if (wild_jail_name(j->name)) 157 requeue(j, &wild); 158 } 159 160 TAILQ_FOREACH(j, &cfjails, tq) { 161 /* Set aside the jail's parameters. */ 162 TAILQ_INIT(&opp); 163 TAILQ_CONCAT(&opp, &j->params, tq); 164 /* 165 * The jail name implies its "name" or "jid" parameter, 166 * though they may also be explicitly set later on. 167 */ 168 add_param(j, NULL, 169 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 170 j->name); 171 /* 172 * Collect parameters for the jail, global parameters/variables, 173 * and any matching wildcard jails. 174 */ 175 did_self = 0; 176 TAILQ_FOREACH(wj, &wild, tq) { 177 if (j->seq < wj->seq && !did_self) { 178 TAILQ_FOREACH(p, &opp, tq) 179 add_param(j, p, 0, NULL); 180 did_self = 1; 181 } 182 if (wild_jail_match(j->name, wj->name)) 183 TAILQ_FOREACH(p, &wj->params, tq) 184 add_param(j, p, 0, NULL); 185 } 186 if (!did_self) 187 TAILQ_FOREACH(p, &opp, tq) 188 add_param(j, p, 0, NULL); 189 190 /* Resolve any variable substitutions. */ 191 pgen = 0; 192 TAILQ_FOREACH(p, &j->params, tq) { 193 p->gen = ++pgen; 194 find_vars: 195 TAILQ_FOREACH(s, &p->val, tq) { 196 while ((v = STAILQ_FIRST(&s->vars))) { 197 TAILQ_FOREACH(vp, &j->params, tq) 198 if (!strcmp(vp->name, v->name)) 199 break; 200 if (!vp) { 201 jail_warnx(j, 202 "%s: variable \"%s\" not found", 203 p->name, v->name); 204 bad_var: 205 j->flags |= JF_FAILED; 206 TAILQ_FOREACH(vp, &j->params, tq) 207 if (vp->gen == pgen) 208 vp->flags |= PF_BAD; 209 goto free_var; 210 } 211 if (vp->flags & PF_BAD) 212 goto bad_var; 213 if (vp->gen == pgen) { 214 jail_warnx(j, "%s: variable loop", 215 v->name); 216 goto bad_var; 217 } 218 TAILQ_FOREACH(vs, &vp->val, tq) 219 if (!STAILQ_EMPTY(&vs->vars)) { 220 vp->gen = pgen; 221 TAILQ_REMOVE(&j->params, vp, 222 tq); 223 TAILQ_INSERT_BEFORE(p, vp, tq); 224 p = vp; 225 goto find_vars; 226 } 227 vs = TAILQ_FIRST(&vp->val); 228 if (TAILQ_NEXT(vs, tq) != NULL && 229 (s->s[0] != '\0' || 230 STAILQ_NEXT(v, tq))) { 231 jail_warnx(j, "%s: array cannot be " 232 "substituted inline", 233 p->name); 234 goto bad_var; 235 } 236 s->s = erealloc(s->s, s->len + vs->len + 1); 237 memmove(s->s + v->pos + vs->len, 238 s->s + v->pos, 239 s->len - v->pos + 1); 240 memcpy(s->s + v->pos, vs->s, vs->len); 241 vv = v; 242 while ((vv = STAILQ_NEXT(vv, tq))) 243 vv->pos += vs->len; 244 s->len += vs->len; 245 while ((vs = TAILQ_NEXT(vs, tq))) { 246 ns = emalloc(sizeof(struct cfstring)); 247 ns->s = estrdup(vs->s); 248 ns->len = vs->len; 249 STAILQ_INIT(&ns->vars); 250 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 251 s = ns; 252 } 253 free_var: 254 free(v->name); 255 STAILQ_REMOVE_HEAD(&s->vars, tq); 256 free(v); 257 } 258 } 259 } 260 261 /* Free the jail's original parameter list and any variables. */ 262 while ((p = TAILQ_FIRST(&opp))) 263 free_param(&opp, p); 264 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 265 if (p->flags & PF_VAR) 266 free_param(&j->params, p); 267 } 268 while ((wj = TAILQ_FIRST(&wild))) { 269 free(wj->name); 270 while ((p = TAILQ_FIRST(&wj->params))) 271 free_param(&wj->params, p); 272 TAILQ_REMOVE(&wild, wj, tq); 273 } 274 } 275 276 /* 277 * Create a new jail record. 278 */ 279 struct cfjail * 280 add_jail(void) 281 { 282 struct cfjail *j; 283 284 j = emalloc(sizeof(struct cfjail)); 285 memset(j, 0, sizeof(struct cfjail)); 286 TAILQ_INIT(&j->params); 287 STAILQ_INIT(&j->dep[DEP_FROM]); 288 STAILQ_INIT(&j->dep[DEP_TO]); 289 j->queue = &cfjails; 290 TAILQ_INSERT_TAIL(&cfjails, j, tq); 291 return j; 292 } 293 294 /* 295 * Add a parameter to a jail. 296 */ 297 void 298 add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 299 const char *value) 300 { 301 struct cfstrings nss; 302 struct cfparam *dp, *np; 303 struct cfstring *s, *ns; 304 struct cfvar *v, *nv; 305 const char *name; 306 char *cs, *tname; 307 unsigned flags; 308 309 if (j == NULL) { 310 /* Create a single anonymous jail if one doesn't yet exist. */ 311 j = TAILQ_LAST(&cfjails, cfjails); 312 if (j == NULL) 313 j = add_jail(); 314 } 315 TAILQ_INIT(&nss); 316 if (p != NULL) { 317 name = p->name; 318 flags = p->flags; 319 /* 320 * Make a copy of the parameter's string list, 321 * which may be freed if it's overridden later. 322 */ 323 TAILQ_FOREACH(s, &p->val, tq) { 324 ns = emalloc(sizeof(struct cfstring)); 325 ns->s = estrdup(s->s); 326 ns->len = s->len; 327 STAILQ_INIT(&ns->vars); 328 STAILQ_FOREACH(v, &s->vars, tq) { 329 nv = emalloc(sizeof(struct cfvar)); 330 nv->name = strdup(v->name); 331 nv->pos = v->pos; 332 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 333 } 334 TAILQ_INSERT_TAIL(&nss, ns, tq); 335 } 336 } else { 337 flags = PF_APPEND; 338 if (ipnum != IP__NULL) { 339 name = intparams[ipnum].name; 340 flags |= intparams[ipnum].flags; 341 } else if ((cs = strchr(value, '='))) { 342 tname = alloca(cs - value + 1); 343 strlcpy(tname, value, cs - value + 1); 344 name = tname; 345 value = cs + 1; 346 } else { 347 name = value; 348 value = NULL; 349 } 350 if (value != NULL) { 351 ns = emalloc(sizeof(struct cfstring)); 352 ns->s = estrdup(value); 353 ns->len = strlen(value); 354 STAILQ_INIT(&ns->vars); 355 TAILQ_INSERT_TAIL(&nss, ns, tq); 356 } 357 } 358 359 /* See if this parameter has already been added. */ 360 if (ipnum != IP__NULL) 361 dp = j->intparams[ipnum]; 362 else 363 TAILQ_FOREACH(dp, &j->params, tq) 364 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 365 break; 366 if (dp != NULL) { 367 /* Found it - append or replace. */ 368 if (dp->flags & PF_IMMUTABLE) { 369 jail_warnx(j, "cannot redefine variable \"%s\".", 370 dp->name); 371 return; 372 } 373 if (strcmp(dp->name, name)) { 374 free(dp->name); 375 dp->name = estrdup(name); 376 } 377 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 378 free_param_strings(dp); 379 TAILQ_CONCAT(&dp->val, &nss, tq); 380 dp->flags |= flags; 381 } else { 382 /* Not found - add it. */ 383 np = emalloc(sizeof(struct cfparam)); 384 np->name = estrdup(name); 385 TAILQ_INIT(&np->val); 386 TAILQ_CONCAT(&np->val, &nss, tq); 387 np->flags = flags; 388 np->gen = 0; 389 TAILQ_INSERT_TAIL(&j->params, np, tq); 390 if (ipnum != IP__NULL) 391 j->intparams[ipnum] = np; 392 else 393 for (ipnum = IP__NULL + 1; ipnum < IP_NPARAM; ipnum++) 394 if (!(intparams[ipnum].flags & PF_CONV) && 395 equalopts(name, intparams[ipnum].name)) { 396 j->intparams[ipnum] = np; 397 np->flags |= intparams[ipnum].flags; 398 break; 399 } 400 } 401 } 402 403 /* 404 * Return if a boolean parameter exists and is true. 405 */ 406 int 407 bool_param(const struct cfparam *p) 408 { 409 const char *cs; 410 411 if (p == NULL) 412 return 0; 413 cs = strrchr(p->name, '.'); 414 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 415 (TAILQ_EMPTY(&p->val) || 416 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 417 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 418 } 419 420 /* 421 * Set an integer if a parameter if it exists. 422 */ 423 int 424 int_param(const struct cfparam *p, int *ip) 425 { 426 if (p == NULL || TAILQ_EMPTY(&p->val)) 427 return 0; 428 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 429 return 1; 430 } 431 432 /* 433 * Return the string value of a scalar parameter if it exists. 434 */ 435 const char * 436 string_param(const struct cfparam *p) 437 { 438 return (p && !TAILQ_EMPTY(&p->val) 439 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 440 } 441 442 /* 443 * Check syntax and values of internal parameters. Set some internal 444 * parameters based on the values of others. 445 */ 446 int 447 check_intparams(struct cfjail *j) 448 { 449 struct cfparam *p; 450 struct cfstring *s; 451 FILE *f; 452 const char *val; 453 char *cs, *ep, *ln; 454 size_t lnlen; 455 int error; 456 #if defined(INET) || defined(INET6) 457 struct addrinfo hints; 458 struct addrinfo *ai0, *ai; 459 const char *hostname; 460 int gicode, defif; 461 #endif 462 #ifdef INET 463 struct in_addr addr4; 464 int ip4ok; 465 char avalue4[INET_ADDRSTRLEN]; 466 #endif 467 #ifdef INET6 468 struct in6_addr addr6; 469 int ip6ok; 470 char avalue6[INET6_ADDRSTRLEN]; 471 #endif 472 473 error = 0; 474 /* Check format of boolan and integer values. */ 475 TAILQ_FOREACH(p, &j->params, tq) { 476 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 477 val = TAILQ_LAST(&p->val, cfstrings)->s; 478 if (p->flags & PF_BOOL) { 479 if (strcasecmp(val, "false") && 480 strcasecmp(val, "true") && 481 ((void)strtol(val, &ep, 10), *ep)) { 482 jail_warnx(j, 483 "%s: unknown boolean value \"%s\"", 484 p->name, val); 485 error = -1; 486 } 487 } else { 488 (void)strtol(val, &ep, 10); 489 if (ep == val || *ep) { 490 jail_warnx(j, 491 "%s: non-integer value \"%s\"", 492 p->name, val); 493 error = -1; 494 } 495 } 496 } 497 } 498 499 #if defined(INET) || defined(INET6) 500 /* 501 * The ip_hostname parameter looks up the hostname, and adds parameters 502 * for any IP addresses it finds. 503 */ 504 if (((j->flags & JF_OP_MASK) != JF_STOP || 505 j->intparams[IP_INTERFACE] != NULL) && 506 bool_param(j->intparams[IP_IP_HOSTNAME]) && 507 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 508 j->intparams[IP_IP_HOSTNAME] = NULL; 509 /* 510 * Silently ignore unsupported address families from 511 * DNS lookups. 512 */ 513 #ifdef INET 514 ip4ok = feature_present("inet"); 515 #endif 516 #ifdef INET6 517 ip6ok = feature_present("inet6"); 518 #endif 519 if ( 520 #if defined(INET) && defined(INET6) 521 ip4ok || ip6ok 522 #elif defined(INET) 523 ip4ok 524 #elif defined(INET6) 525 ip6ok 526 #endif 527 ) { 528 /* Look up the hostname (or get the address) */ 529 memset(&hints, 0, sizeof(hints)); 530 hints.ai_socktype = SOCK_STREAM; 531 hints.ai_family = 532 #if defined(INET) && defined(INET6) 533 ip4ok ? (ip6ok ? PF_UNSPEC : PF_INET) : PF_INET6; 534 #elif defined(INET) 535 PF_INET; 536 #elif defined(INET6) 537 PF_INET6; 538 #endif 539 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 540 if (gicode != 0) { 541 jail_warnx(j, "host.hostname %s: %s", hostname, 542 gai_strerror(gicode)); 543 error = -1; 544 } else { 545 /* 546 * Convert the addresses to ASCII so jailparam 547 * can convert them back. Errors are not 548 * expected here. 549 */ 550 for (ai = ai0; ai; ai = ai->ai_next) 551 switch (ai->ai_family) { 552 #ifdef INET 553 case AF_INET: 554 memcpy(&addr4, 555 &((struct sockaddr_in *) 556 (void *)ai->ai_addr)-> 557 sin_addr, sizeof(addr4)); 558 if (inet_ntop(AF_INET, 559 &addr4, avalue4, 560 INET_ADDRSTRLEN) == NULL) 561 err(1, "inet_ntop"); 562 add_param(j, NULL, KP_IP4_ADDR, 563 avalue4); 564 break; 565 #endif 566 #ifdef INET6 567 case AF_INET6: 568 memcpy(&addr6, 569 &((struct sockaddr_in6 *) 570 (void *)ai->ai_addr)-> 571 sin6_addr, sizeof(addr6)); 572 if (inet_ntop(AF_INET6, 573 &addr6, avalue6, 574 INET6_ADDRSTRLEN) == NULL) 575 err(1, "inet_ntop"); 576 add_param(j, NULL, KP_IP6_ADDR, 577 avalue6); 578 break; 579 #endif 580 } 581 freeaddrinfo(ai0); 582 } 583 } 584 } 585 586 /* 587 * IP addresses may include an interface to set that address on, 588 * a netmask/suffix for that address and options for ifconfig. 589 * These are copied to an internal command parameter and then stripped 590 * so they won't be passed on to jailparam_set. 591 */ 592 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 593 #ifdef INET 594 if (j->intparams[KP_IP4_ADDR] != NULL) { 595 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR]->val, tq) { 596 cs = strchr(s->s, '|'); 597 if (cs || defif) 598 add_param(j, NULL, IP__IP4_IFADDR, s->s); 599 if (cs) { 600 strcpy(s->s, cs + 1); 601 s->len -= cs + 1 - s->s; 602 } 603 if ((cs = strchr(s->s, '/')) != NULL) { 604 *cs = '\0'; 605 s->len = cs - s->s; 606 } 607 if ((cs = strchr(s->s, ' ')) != NULL) { 608 *cs = '\0'; 609 s->len = cs - s->s; 610 } 611 } 612 } 613 #endif 614 #ifdef INET6 615 if (j->intparams[KP_IP6_ADDR] != NULL) { 616 TAILQ_FOREACH(s, &j->intparams[KP_IP6_ADDR]->val, tq) { 617 cs = strchr(s->s, '|'); 618 if (cs || defif) 619 add_param(j, NULL, IP__IP6_IFADDR, s->s); 620 if (cs) { 621 strcpy(s->s, cs + 1); 622 s->len -= cs + 1 - s->s; 623 } 624 if ((cs = strchr(s->s, '/')) != NULL) { 625 *cs = '\0'; 626 s->len = cs - s->s; 627 } 628 if ((cs = strchr(s->s, ' ')) != NULL) { 629 *cs = '\0'; 630 s->len = cs - s->s; 631 } 632 } 633 } 634 #endif 635 #endif 636 637 /* 638 * Read mount.fstab file(s), and treat each line as its own mount 639 * parameter. 640 */ 641 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 642 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 643 if (s->len == 0) 644 continue; 645 f = fopen(s->s, "r"); 646 if (f == NULL) { 647 jail_warnx(j, "mount.fstab: %s: %s", 648 s->s, strerror(errno)); 649 error = -1; 650 continue; 651 } 652 while ((ln = fgetln(f, &lnlen))) { 653 if ((cs = memchr(ln, '#', lnlen - 1))) 654 lnlen = cs - ln + 1; 655 if (ln[lnlen - 1] == '\n' || 656 ln[lnlen - 1] == '#') 657 ln[lnlen - 1] = '\0'; 658 else { 659 cs = alloca(lnlen + 1); 660 strlcpy(cs, ln, lnlen + 1); 661 ln = cs; 662 } 663 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 664 } 665 fclose(f); 666 } 667 } 668 if (error) 669 failed(j); 670 return error; 671 } 672 673 /* 674 * Import parameters into libjail's binary jailparam format. 675 */ 676 int 677 import_params(struct cfjail *j) 678 { 679 struct cfparam *p; 680 struct cfstring *s, *ts; 681 struct jailparam *jp; 682 char *value, *cs; 683 size_t vallen; 684 int error; 685 686 error = 0; 687 j->njp = 0; 688 TAILQ_FOREACH(p, &j->params, tq) 689 if (!(p->flags & PF_INTERNAL)) 690 j->njp++; 691 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 692 TAILQ_FOREACH(p, &j->params, tq) { 693 if (p->flags & PF_INTERNAL) 694 continue; 695 if (jailparam_init(jp, p->name) < 0) { 696 error = -1; 697 jail_warnx(j, "%s", jail_errmsg); 698 jp++; 699 continue; 700 } 701 if (TAILQ_EMPTY(&p->val)) 702 value = NULL; 703 else if (!jp->jp_elemlen || 704 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 705 /* 706 * Scalar parameters silently discard multiple (array) 707 * values, keeping only the last value added. This 708 * lets values added from the command line append to 709 * arrays wthout pre-checking the type. 710 */ 711 value = TAILQ_LAST(&p->val, cfstrings)->s; 712 } else { 713 /* 714 * Convert arrays into comma-separated strings, which 715 * jailparam_import will then convert back into arrays. 716 */ 717 vallen = 0; 718 TAILQ_FOREACH(s, &p->val, tq) 719 vallen += s->len + 1; 720 value = alloca(vallen); 721 cs = value; 722 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 723 memcpy(cs, s->s, s->len); 724 cs += s->len + 1; 725 cs[-1] = ','; 726 } 727 value[vallen - 1] = '\0'; 728 } 729 if (jailparam_import(jp, value) < 0) { 730 error = -1; 731 jail_warnx(j, "%s", jail_errmsg); 732 } 733 jp++; 734 } 735 if (error) { 736 jailparam_free(j->jp, j->njp); 737 free(j->jp); 738 j->jp = NULL; 739 failed(j); 740 } 741 return error; 742 } 743 744 /* 745 * Check if options are equal (with or without the "no" prefix). 746 */ 747 int 748 equalopts(const char *opt1, const char *opt2) 749 { 750 char *p; 751 752 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 753 if (strcmp(opt1, opt2) == 0) 754 return (1); 755 /* "noopt" vs. "opt" */ 756 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 757 return (1); 758 /* "opt" vs. "noopt" */ 759 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 760 return (1); 761 while ((p = strchr(opt1, '.')) != NULL && 762 !strncmp(opt1, opt2, ++p - opt1)) { 763 opt2 += p - opt1; 764 opt1 = p; 765 /* "foo.noopt" vs. "foo.opt" */ 766 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 767 return (1); 768 /* "foo.opt" vs. "foo.noopt" */ 769 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 770 return (1); 771 } 772 return (0); 773 } 774 775 /* 776 * See if a jail name matches a wildcard. 777 */ 778 int 779 wild_jail_match(const char *jname, const char *wname) 780 { 781 const char *jc, *jd, *wc, *wd; 782 783 /* 784 * A non-final "*" component in the wild name matches a single jail 785 * component, and a final "*" matches one or more jail components. 786 */ 787 for (jc = jname, wc = wname; 788 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 789 jc = jd + 1, wc = wd + 1) 790 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 791 return 0; 792 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 793 } 794 795 /* 796 * Return if a jail name is a wildcard. 797 */ 798 int 799 wild_jail_name(const char *wname) 800 { 801 const char *wc; 802 803 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 804 if ((wc == wname || wc[-1] == '.') && 805 (wc[1] == '\0' || wc[1] == '.')) 806 return 1; 807 return 0; 808 } 809 810 /* 811 * Free a parameter record and all its strings and variables. 812 */ 813 static void 814 free_param(struct cfparams *pp, struct cfparam *p) 815 { 816 free(p->name); 817 free_param_strings(p); 818 TAILQ_REMOVE(pp, p, tq); 819 free(p); 820 } 821 822 static void 823 free_param_strings(struct cfparam *p) 824 { 825 struct cfstring *s; 826 struct cfvar *v; 827 828 while ((s = TAILQ_FIRST(&p->val))) { 829 free(s->s); 830 while ((v = STAILQ_FIRST(&s->vars))) { 831 free(v->name); 832 STAILQ_REMOVE_HEAD(&s->vars, tq); 833 free(v); 834 } 835 TAILQ_REMOVE(&p->val, s, tq); 836 free(s); 837 } 838 } 839