config.c revision 223190
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: projects/jailconf/usr.sbin/jail/config.c 223190 2011-06-17 16:21:03Z jamie $"); 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 44#include "jailp.h" 45 46struct ipspec { 47 const char *name; 48 unsigned flags; 49}; 50 51extern FILE *yyin; 52extern int yynerrs; 53 54struct cfjails cfjails = TAILQ_HEAD_INITIALIZER(cfjails); 55 56static void free_param(struct cfparams *pp, struct cfparam *p); 57static void free_param_strings(struct cfparam *p); 58 59static const struct ipspec intparams[] = { 60 [IP_ALLOW_DYING] = {"allow.dying", PF_INTERNAL | PF_BOOL}, 61 [IP_COMMAND] = {"command", PF_INTERNAL}, 62 [IP_DEPEND] = {"depend", PF_INTERNAL}, 63 [IP_EXEC_CLEAN] = {"exec.clean", PF_INTERNAL | PF_BOOL}, 64 [IP_EXEC_CONSOLELOG] = {"exec.consolelog", PF_INTERNAL}, 65 [IP_EXEC_FIB] = {"exec.fib", PF_INTERNAL | PF_INT}, 66 [IP_EXEC_JAIL_USER] = {"exec.jail_user", PF_INTERNAL}, 67 [IP_EXEC_POSTSTART] = {"exec.poststart", PF_INTERNAL}, 68 [IP_EXEC_POSTSTOP] = {"exec.poststop", PF_INTERNAL}, 69 [IP_EXEC_PRESTART] = {"exec.prestart", PF_INTERNAL}, 70 [IP_EXEC_PRESTOP] = {"exec.prestop", PF_INTERNAL}, 71 [IP_EXEC_START] = {"exec.start", PF_INTERNAL}, 72 [IP_EXEC_STOP] = {"exec.stop", PF_INTERNAL}, 73 [IP_EXEC_SYSTEM_JAIL_USER]= {"exec.system_jail_user", 74 PF_INTERNAL | PF_BOOL}, 75 [IP_EXEC_SYSTEM_USER] = {"exec.system_user", PF_INTERNAL}, 76 [IP_EXEC_TIMEOUT] = {"exec.timeout", PF_INTERNAL | PF_INT}, 77 [IP_INTERFACE] = {"interface", PF_INTERNAL}, 78 [IP_IP_HOSTNAME] = {"ip_hostname", PF_INTERNAL | PF_BOOL}, 79 [IP_MOUNT] = {"mount", PF_INTERNAL}, 80 [IP_MOUNT_DEVFS] = {"mount.devfs", PF_INTERNAL | PF_BOOL}, 81 [IP_MOUNT_DEVFS_RULESET]= {"mount.devfs.ruleset", PF_INTERNAL}, 82 [IP_MOUNT_FSTAB] = {"mount.fstab", PF_INTERNAL}, 83 [IP_STOP_TIMEOUT] = {"stop.timeout", PF_INTERNAL | PF_INT}, 84 [IP_VNET_INTERFACE] = {"vnet.interface", PF_INTERNAL}, 85 [IP__IP4_IFADDR] = {"ip4.addr", PF_INTERNAL | PF_CONV}, 86#ifdef INET6 87 [IP__IP6_IFADDR] = {"ip6.addr", PF_INTERNAL | PF_CONV}, 88#endif 89 [IP__MOUNT_FROM_FSTAB] = {"mount.fstab", PF_INTERNAL | PF_CONV}, 90 [IP__OP] = {NULL, PF_CONV}, 91 [KP_ALLOW_CHFLAGS] = {"allow.chflags", 0}, 92 [KP_ALLOW_MOUNT] = {"allow.mount", 0}, 93 [KP_ALLOW_RAW_SOCKETS] = {"allow.raw_sockets", 0}, 94 [KP_ALLOW_SET_HOSTNAME]= {"allow.set_hostname", 0}, 95 [KP_ALLOW_SOCKET_AF] = {"allow.socket_af", 0}, 96 [KP_ALLOW_SYSVIPC] = {"allow.sysvipc", 0}, 97 [KP_ENFORCE_STATFS] = {"enforce_statfs", 0}, 98 [KP_HOST_HOSTNAME] = {"host.hostname", 0}, 99 [KP_IP4_ADDR] = {"ip4.addr", 0}, 100#ifdef INET6 101 [KP_IP6_ADDR] = {"ip6.addr", 0}, 102#endif 103 [KP_JID] = {"jid", 0}, 104 [KP_NAME] = {"name", 0}, 105 [KP_PATH] = {"path", 0}, 106 [KP_PERSIST] = {"persist", 0}, 107 [KP_SECURELEVEL] = {"securelevel", 0}, 108 [KP_VNET] = {"vnet", 0}, 109}; 110 111/* 112 * Parse the jail configuration file. 113 */ 114void 115load_config(void) 116{ 117 struct cfjails wild; 118 struct cfparams opp; 119 struct cfjail *j, *tj, *wj; 120 struct cfparam *p, *vp, *tp; 121 struct cfstring *s, *vs, *ns; 122 struct cfvar *v; 123 char *ep; 124 size_t varoff; 125 int did_self, jseq, pgen; 126 127 if (!strcmp(cfname, "-")) { 128 cfname = "STDIN"; 129 yyin = stdin; 130 } else { 131 yyin = fopen(cfname, "r"); 132 if (!yyin) 133 err(1, "%s", cfname); 134 } 135 if (yyparse() || yynerrs) 136 exit(1); 137 138 /* Separate the wildcard jails out from the actual jails. */ 139 jseq = 0; 140 TAILQ_INIT(&wild); 141 TAILQ_FOREACH_SAFE(j, &cfjails, tq, tj) { 142 j->seq = ++jseq; 143 if (wild_jail_name(j->name)) 144 requeue(j, &wild); 145 } 146 147 TAILQ_FOREACH(j, &cfjails, tq) { 148 /* Set aside the jail's parameters. */ 149 TAILQ_INIT(&opp); 150 TAILQ_CONCAT(&opp, &j->params, tq); 151 /* 152 * The jail name implies its "name" or "jid" parameter, 153 * though they may also be explicitly set later on. 154 */ 155 add_param(j, NULL, 156 strtol(j->name, &ep, 10) && !*ep ? KP_JID : KP_NAME, 157 j->name); 158 /* 159 * Collect parameters for the jail, global parameters/variables, 160 * and any matching wildcard jails. 161 */ 162 did_self = 0; 163 TAILQ_FOREACH(wj, &wild, tq) { 164 if (j->seq < wj->seq && !did_self) { 165 TAILQ_FOREACH(p, &opp, tq) 166 add_param(j, p, 0, NULL); 167 did_self = 1; 168 } 169 if (wild_jail_match(j->name, wj->name)) 170 TAILQ_FOREACH(p, &wj->params, tq) 171 add_param(j, p, 0, NULL); 172 } 173 if (!did_self) 174 TAILQ_FOREACH(p, &opp, tq) 175 add_param(j, p, 0, NULL); 176 177 /* Resolve any variable substitutions. */ 178 pgen = 0; 179 TAILQ_FOREACH(p, &j->params, tq) { 180 p->gen = ++pgen; 181 find_vars: 182 TAILQ_FOREACH(s, &p->val, tq) { 183 varoff = 0; 184 while ((v = STAILQ_FIRST(&s->vars))) { 185 TAILQ_FOREACH(vp, &j->params, tq) 186 if (!strcmp(vp->name, v->name)) 187 break; 188 if (!vp) { 189 jail_warnx(j, 190 "%s: variable \"%s\" not found", 191 p->name, v->name); 192 bad_var: 193 j->flags |= JF_FAILED; 194 TAILQ_FOREACH(vp, &j->params, tq) 195 if (vp->gen == pgen) 196 vp->flags |= PF_BAD; 197 goto free_var; 198 } 199 if (vp->flags & PF_BAD) 200 goto bad_var; 201 if (vp->gen == pgen) { 202 jail_warnx(j, "%s: variable loop", 203 v->name); 204 goto bad_var; 205 } 206 TAILQ_FOREACH(vs, &vp->val, tq) 207 if (!STAILQ_EMPTY(&vs->vars)) { 208 vp->gen = pgen; 209 TAILQ_REMOVE(&j->params, vp, 210 tq); 211 TAILQ_INSERT_BEFORE(p, vp, tq); 212 p = vp; 213 goto find_vars; 214 } 215 vs = TAILQ_FIRST(&vp->val); 216 if (TAILQ_NEXT(vs, tq) != NULL && 217 (s->s[0] != '\0' || 218 STAILQ_NEXT(v, tq))) { 219 jail_warnx(j, "%s: array cannot be " 220 "substituted inline", 221 p->name); 222 goto bad_var; 223 } 224 s->s = erealloc(s->s, s->len + vs->len + 1); 225 memmove(s->s + v->pos + varoff + vs->len, 226 s->s + v->pos + varoff, 227 s->len - (v->pos + varoff) + 1); 228 memcpy(s->s + v->pos + varoff, vs->s, vs->len); 229 varoff += vs->len; 230 s->len += vs->len; 231 while ((vs = TAILQ_NEXT(vs, tq))) { 232 ns = emalloc(sizeof(struct cfstring)); 233 ns->s = estrdup(vs->s); 234 ns->len = vs->len; 235 STAILQ_INIT(&ns->vars); 236 TAILQ_INSERT_AFTER(&p->val, s, ns, tq); 237 s = ns; 238 } 239 free_var: 240 free(v->name); 241 STAILQ_REMOVE_HEAD(&s->vars, tq); 242 free(v); 243 } 244 } 245 } 246 247 /* Free the jail's original parameter list and any variables. */ 248 while ((p = TAILQ_FIRST(&opp))) 249 free_param(&opp, p); 250 TAILQ_FOREACH_SAFE(p, &j->params, tq, tp) 251 if (p->flags & PF_VAR) 252 free_param(&j->params, p); 253 } 254 while ((wj = TAILQ_FIRST(&wild))) { 255 free(wj->name); 256 while ((p = TAILQ_FIRST(&wj->params))) 257 free_param(&wj->params, p); 258 TAILQ_REMOVE(&wild, wj, tq); 259 } 260} 261 262/* 263 * Create a new jail record. 264 */ 265struct cfjail * 266add_jail(void) 267{ 268 struct cfjail *j; 269 270 j = emalloc(sizeof(struct cfjail)); 271 memset(j, 0, sizeof(struct cfjail)); 272 TAILQ_INIT(&j->params); 273 STAILQ_INIT(&j->dep[DEP_FROM]); 274 STAILQ_INIT(&j->dep[DEP_TO]); 275 j->queue = &cfjails; 276 TAILQ_INSERT_TAIL(&cfjails, j, tq); 277 return j; 278} 279 280/* 281 * Add a parameter to a jail. 282 */ 283void 284add_param(struct cfjail *j, const struct cfparam *p, enum intparam ipnum, 285 const char *value) 286{ 287 struct cfstrings nss; 288 struct cfparam *dp, *np; 289 struct cfstring *s, *ns; 290 struct cfvar *v, *nv; 291 struct ipspec *ips; 292 const char *name; 293 char *cs, *tname; 294 unsigned flags; 295 296 if (j == NULL) { 297 /* Create a single anonymous jail if one doesn't yet exist. */ 298 j = TAILQ_LAST(&cfjails, cfjails); 299 if (j == NULL) 300 j = add_jail(); 301 } 302 TAILQ_INIT(&nss); 303 if (p != NULL) { 304 name = p->name; 305 flags = p->flags; 306 /* 307 * Make a copy of the parameter's string list, 308 * which may be freed if it's overridden later. 309 */ 310 TAILQ_FOREACH(s, &p->val, tq) { 311 ns = emalloc(sizeof(struct cfstring)); 312 ns->s = estrdup(s->s); 313 ns->len = s->len; 314 STAILQ_INIT(&ns->vars); 315 STAILQ_FOREACH(v, &s->vars, tq) { 316 nv = emalloc(sizeof(struct cfvar)); 317 nv->name = strdup(v->name); 318 nv->pos = v->pos; 319 STAILQ_INSERT_TAIL(&ns->vars, nv, tq); 320 } 321 TAILQ_INSERT_TAIL(&nss, ns, tq); 322 } 323 } else { 324 flags = PF_APPEND; 325 if (ipnum != 0) { 326 name = intparams[ipnum].name; 327 flags |= intparams[ipnum].flags; 328 } else if ((cs = strchr(value, '='))) { 329 tname = alloca(cs - value + 1); 330 strlcpy(tname, value, cs - value + 1); 331 name = tname; 332 value = cs + 1; 333 } else { 334 name = value; 335 value = NULL; 336 } 337 if (value != NULL) { 338 ns = emalloc(sizeof(struct cfstring)); 339 ns->s = estrdup(value); 340 ns->len = strlen(value); 341 STAILQ_INIT(&ns->vars); 342 TAILQ_INSERT_TAIL(&nss, ns, tq); 343 } 344 } 345 346 /* See if this parameter has already been added. */ 347 if (ipnum != 0) 348 dp = j->intparams[ipnum]; 349 else 350 TAILQ_FOREACH(dp, &j->params, tq) 351 if (!(dp->flags & PF_CONV) && equalopts(dp->name, name)) 352 break; 353 if (dp != NULL) { 354 /* Found it - append or replace. */ 355 if (strcmp(dp->name, name)) { 356 free(dp->name); 357 dp->name = estrdup(name); 358 } 359 if (!(flags & PF_APPEND) || TAILQ_EMPTY(&nss)) 360 free_param_strings(dp); 361 TAILQ_CONCAT(&dp->val, &nss, tq); 362 dp->flags |= flags; 363 } else { 364 /* Not found - add it. */ 365 np = emalloc(sizeof(struct cfparam)); 366 np->name = estrdup(name); 367 TAILQ_INIT(&np->val); 368 TAILQ_CONCAT(&np->val, &nss, tq); 369 np->flags = flags; 370 np->gen = 0; 371 TAILQ_INSERT_TAIL(&j->params, np, tq); 372 if (ipnum != 0) 373 j->intparams[ipnum] = np; 374 else 375 for (ipnum = 1; ipnum < IP_NPARAM; ipnum++) 376 if (!(intparams[ipnum].flags & PF_CONV) && 377 equalopts(name, intparams[ipnum].name)) { 378 j->intparams[ipnum] = np; 379 np->flags |= intparams[ipnum].flags; 380 break; 381 } 382 } 383} 384 385/* 386 * Return if a boolean parameter exists and is true. 387 */ 388int 389bool_param(const struct cfparam *p) 390{ 391 const char *cs; 392 393 if (p == NULL) 394 return 0; 395 cs = strrchr(p->name, '.'); 396 return !strncmp(cs ? cs + 1 : p->name, "no", 2) ^ 397 (TAILQ_EMPTY(&p->val) || 398 !strcasecmp(TAILQ_LAST(&p->val, cfstrings)->s, "true") || 399 (strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10))); 400} 401 402/* 403 * Set an integer if a parameter if it exists. 404 */ 405int 406int_param(const struct cfparam *p, int *ip) 407{ 408 if (p == NULL || TAILQ_EMPTY(&p->val)) 409 return 0; 410 *ip = strtol(TAILQ_LAST(&p->val, cfstrings)->s, NULL, 10); 411 return 1; 412} 413 414/* 415 * Return the string value of a scalar parameter if it exists. 416 */ 417const char * 418string_param(const struct cfparam *p) 419{ 420 return (p && !TAILQ_EMPTY(&p->val) 421 ? TAILQ_LAST(&p->val, cfstrings)->s : NULL); 422} 423 424/* 425 * Check syntax and values of internal parameters. Set some internal 426 * parameters based on the values of others. 427 */ 428int 429check_intparams(struct cfjail *j) 430{ 431 struct in_addr addr4; 432 struct addrinfo hints; 433 struct addrinfo *ai0, *ai; 434 struct cfparam *p; 435 struct cfstring *s, *ns; 436 FILE *f; 437 const char *hostname, *val; 438 char *cs, *ep, *ln; 439 size_t size, lnlen; 440 int error, gicode, ip4ok, defif, prefix; 441 int mib[4]; 442 char avalue4[INET_ADDRSTRLEN]; 443#ifdef INET6 444 struct in6_addr addr6; 445 int ip6ok, isip6; 446 char avalue6[INET6_ADDRSTRLEN]; 447#endif 448 449 error = 0; 450 /* Check format of boolan and integer values. */ 451 TAILQ_FOREACH(p, &j->params, tq) { 452 if (!TAILQ_EMPTY(&p->val) && (p->flags & (PF_BOOL | PF_INT))) { 453 val = TAILQ_LAST(&p->val, cfstrings)->s; 454 if (p->flags & PF_BOOL) { 455 if (strcasecmp(val, "false") && 456 strcasecmp(val, "true") && 457 ((void)strtol(val, &ep, 10), *ep)) { 458 jail_warnx(j, 459 "%s: unknown boolean value \"%s\"", 460 p->name, val); 461 error = -1; 462 } 463 } else { 464 (void)strtol(val, &ep, 10); 465 if (ep == val || *ep) { 466 jail_warnx(j, 467 "%s: non-integer value \"%s\"", 468 p->name, val); 469 error = -1; 470 } 471 } 472 } 473 } 474 475 /* 476 * The ip_hostname parameter looks up the hostname, and adds parameters 477 * for any IP addresses it finds. 478 */ 479 if (((j->flags & JF_OP_MASK) != JF_STOP || 480 j->intparams[IP_INTERFACE] != NULL) && 481 bool_param(j->intparams[IP_IP_HOSTNAME]) && 482 (hostname = string_param(j->intparams[KP_HOST_HOSTNAME]))) { 483 j->intparams[IP_IP_HOSTNAME] = NULL; 484 /* 485 * Silently ignore unsupported address families from 486 * DNS lookups. 487 */ 488 size = 4; 489 ip4ok = sysctlnametomib("security.jail.param.ip4", mib, &size) 490 == 0; 491#ifdef INET6 492 size = 4; 493 ip6ok = sysctlnametomib("security.jail.param.ip6", mib, &size) 494 == 0; 495#endif 496 if (ip4ok 497#ifdef INET6 498 || ip6ok 499#endif 500 ) { 501 /* Look up the hostname (or get the address) */ 502 memset(&hints, 0, sizeof(hints)); 503 hints.ai_socktype = SOCK_STREAM; 504 hints.ai_family = 505#ifdef INET6 506 ip6ok ? (ip4ok ? PF_UNSPEC : PF_INET6) : 507#endif 508 PF_INET; 509 gicode = getaddrinfo(hostname, NULL, &hints, &ai0); 510 if (gicode != 0) { 511 jail_warnx(j, "host.hostname %s: %s", hostname, 512 gai_strerror(gicode)); 513 error = -1; 514 } else { 515 /* 516 * Convert the addresses to ASCII so jailparam 517 * can convert them back. Errors are not 518 * expected here. 519 */ 520 for (ai = ai0; ai; ai = ai->ai_next) 521 switch (ai->ai_family) { 522 case AF_INET: 523 memcpy(&addr4, 524 &((struct sockaddr_in *) 525 (void *)ai->ai_addr)-> 526 sin_addr, sizeof(addr4)); 527 if (inet_ntop(AF_INET, 528 &addr4, avalue4, 529 INET_ADDRSTRLEN) == NULL) 530 err(1, "inet_ntop"); 531 add_param(j, NULL, KP_IP4_ADDR, 532 avalue4); 533 break; 534#ifdef INET6 535 case AF_INET6: 536 memcpy(&addr6, 537 &((struct sockaddr_in6 *) 538 (void *)ai->ai_addr)-> 539 sin6_addr, sizeof(addr6)); 540 if (inet_ntop(AF_INET6, 541 &addr6, avalue6, 542 INET6_ADDRSTRLEN) == NULL) 543 err(1, "inet_ntop"); 544 add_param(j, NULL, KP_IP6_ADDR, 545 avalue6); 546 break; 547#endif 548 } 549 freeaddrinfo(ai0); 550 } 551 } 552 } 553 554 /* 555 * IP addresses may include an interface to set that address on, 556 * and a netmask/suffix for that address. 557 */ 558 defif = string_param(j->intparams[IP_INTERFACE]) != NULL; 559#ifdef INET6 560 for (isip6 = 0; isip6 <= 1; isip6++) 561#else 562#define isip6 0 563 do 564#endif 565 { 566 if (j->intparams[KP_IP4_ADDR + isip6] == NULL) 567 continue; 568 TAILQ_FOREACH(s, &j->intparams[KP_IP4_ADDR + isip6]->val, tq) { 569 cs = strchr(s->s, '|'); 570 if (cs || defif) 571 add_param(j, NULL, IP__IP4_IFADDR + isip6, 572 s->s); 573 if (cs) { 574 strcpy(s->s, cs + 1); 575 s->len -= cs + 1 - s->s; 576 } 577 if ((cs = strchr(s->s, '/'))) { 578 prefix = strtol(cs + 1, &ep, 10); 579 if ( 580#ifdef INET6 581 !isip6 && 582#endif 583 *ep == '.' 584 ? inet_pton(AF_INET, cs + 1, &addr4) != 1 585 : *ep || prefix < 0 || prefix > ( 586#ifdef INET6 587 isip6 ? 128 : 588#endif 589 32)) { 590 jail_warnx(j, 591#ifdef INET6 592 isip6 593 ? "ip6.addr: bad prefixlen \"%s\"" : 594#endif 595 "ip4.addr: bad netmask \"%s\"", 596 cs); 597 error = -1; 598 } 599 *cs = '\0'; 600 s->len = cs - s->s + 1; 601 } 602 } 603 } 604#ifndef INET6 605 while (0); 606#endif 607 608 /* 609 * Read mount.fstab file(s), and treat each line as its own mount 610 * parameter. 611 */ 612 if (j->intparams[IP_MOUNT_FSTAB] != NULL) { 613 TAILQ_FOREACH(s, &j->intparams[IP_MOUNT_FSTAB]->val, tq) { 614 if (s->len == 0) 615 continue; 616 f = fopen(s->s, "r"); 617 if (f == NULL) { 618 jail_warnx(j, "mount.fstab: %s: %s", 619 s->s, strerror(errno)); 620 error = -1; 621 continue; 622 } 623 while ((ln = fgetln(f, &lnlen))) { 624 if ((cs = memchr(ln, '#', lnlen - 1))) 625 lnlen = cs - ln + 1; 626 if (ln[lnlen - 1] == '\n' || 627 ln[lnlen - 1] == '#') 628 ln[lnlen - 1] = '\0'; 629 else { 630 cs = alloca(lnlen + 1); 631 strlcpy(cs, ln, lnlen + 1); 632 ln = cs; 633 } 634 add_param(j, NULL, IP__MOUNT_FROM_FSTAB, ln); 635 } 636 fclose(f); 637 } 638 } 639 if (error) 640 failed(j); 641 return error; 642} 643 644/* 645 * Import parameters into libjail's binary jailparam format. 646 */ 647int 648import_params(struct cfjail *j) 649{ 650 struct cfparam *p; 651 struct cfstring *s, *ts; 652 struct jailparam *jp; 653 char *value, *cs; 654 size_t vallen; 655 int error; 656 657 error = 0; 658 j->njp = 0; 659 TAILQ_FOREACH(p, &j->params, tq) 660 if (!(p->flags & PF_INTERNAL)) 661 j->njp++; 662 j->jp = jp = emalloc(j->njp * sizeof(struct jailparam)); 663 TAILQ_FOREACH(p, &j->params, tq) { 664 if (p->flags & PF_INTERNAL) 665 continue; 666 if (jailparam_init(jp, p->name) < 0) { 667 error = -1; 668 jail_warnx(j, "%s", jail_errmsg); 669 continue; 670 } 671 if (TAILQ_EMPTY(&p->val)) 672 value = NULL; 673 else if (!jp->jp_elemlen || 674 !TAILQ_NEXT(TAILQ_FIRST(&p->val), tq)) { 675 /* 676 * Scalar parameters silently discard multiple (array) 677 * values, keeping only the last value added. This 678 * lets values added from the command line append to 679 * arrays wthout pre-checking the type. 680 */ 681 value = TAILQ_LAST(&p->val, cfstrings)->s; 682 } else { 683 /* 684 * Convert arrays into comma-separated strings, which 685 * jailparam_import will then convert back into arrays. 686 */ 687 vallen = 0; 688 TAILQ_FOREACH(s, &p->val, tq) 689 vallen += s->len + 1; 690 value = alloca(vallen); 691 cs = value; 692 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 693 strcpy(cs, s->s); 694 if (ts != NULL) { 695 cs += s->len + 1; 696 cs[-1] = ','; 697 } 698 } 699 } 700 if (jailparam_import(jp, value) < 0) { 701 error = -1; 702 jail_warnx(j, "%s", jail_errmsg); 703 } 704 jp++; 705 } 706 if (error) { 707 jailparam_free(j->jp, j->njp); 708 free(j->jp); 709 j->jp = NULL; 710 failed(j); 711 } 712 return error; 713} 714 715/* 716 * Check if options are equal (with or without the "no" prefix). 717 */ 718int 719equalopts(const char *opt1, const char *opt2) 720{ 721 char *p; 722 723 /* "opt" vs. "opt" or "noopt" vs. "noopt" */ 724 if (strcmp(opt1, opt2) == 0) 725 return (1); 726 /* "noopt" vs. "opt" */ 727 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 728 return (1); 729 /* "opt" vs. "noopt" */ 730 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 731 return (1); 732 while ((p = strchr(opt1, '.')) != NULL && 733 !strncmp(opt1, opt2, ++p - opt1)) { 734 opt2 += p - opt1; 735 opt1 = p; 736 /* "foo.noopt" vs. "foo.opt" */ 737 if (strncmp(opt1, "no", 2) == 0 && strcmp(opt1 + 2, opt2) == 0) 738 return (1); 739 /* "foo.opt" vs. "foo.noopt" */ 740 if (strncmp(opt2, "no", 2) == 0 && strcmp(opt1, opt2 + 2) == 0) 741 return (1); 742 } 743 return (0); 744} 745 746/* 747 * See if a jail name matches a wildcard. 748 */ 749int 750wild_jail_match(const char *jname, const char *wname) 751{ 752 const char *jc, *jd, *wc, *wd; 753 754 /* 755 * A non-final "*" component in the wild name matches a single jail 756 * component, and a final "*" matches one or more jail components. 757 */ 758 for (jc = jname, wc = wname; 759 (jd = strchr(jc, '.')) && (wd = strchr(wc, '.')); 760 jc = jd + 1, wc = wd + 1) 761 if (strncmp(jc, wc, jd - jc + 1) && strncmp(wc, "*.", 2)) 762 return 0; 763 return (!strcmp(jc, wc) || !strcmp(wc, "*")); 764} 765 766/* 767 * Return if a jail name is a wildcard. 768 */ 769int 770wild_jail_name(const char *wname) 771{ 772 const char *wc; 773 774 for (wc = strchr(wname, '*'); wc; wc = strchr(wc + 1, '*')) 775 if ((wc == wname || wc[-1] == '.') && 776 (wc[1] == '\0' || wc[1] == '.')) 777 return 1; 778 return 0; 779} 780 781/* 782 * Free a parameter record and all its strings and variables. 783 */ 784static void 785free_param(struct cfparams *pp, struct cfparam *p) 786{ 787 free(p->name); 788 free_param_strings(p); 789 TAILQ_REMOVE(pp, p, tq); 790 free(p); 791} 792 793static void 794free_param_strings(struct cfparam *p) 795{ 796 struct cfstring *s; 797 struct cfvar *v; 798 799 while ((s = TAILQ_FIRST(&p->val))) { 800 free(s->s); 801 while ((v = STAILQ_FIRST(&s->vars))) { 802 free(v->name); 803 STAILQ_REMOVE_HEAD(&s->vars, tq); 804 free(v); 805 } 806 TAILQ_REMOVE(&p->val, s, tq); 807 free(s); 808 } 809} 810