1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1999 Poul-Henning Kamp. 5 * Copyright (c) 2009-2012 James Gritton 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 #include <sys/socket.h> 36 #include <sys/sysctl.h> 37 38 #include <arpa/inet.h> 39 #include <netinet/in.h> 40 41 #include <err.h> 42 #include <errno.h> 43 #include <stdarg.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #include "jailp.h" 50 51 #define JP_RDTUN(jp) (((jp)->jp_ctltype & CTLFLAG_RDTUN) == CTLFLAG_RDTUN) 52 53 struct permspec { 54 const char *name; 55 enum intparam ipnum; 56 int rev; 57 }; 58 59 const char *cfname; 60 int iflag; 61 int note_remove; 62 int verbose; 63 64 static void clear_persist(struct cfjail *j); 65 static int update_jail(struct cfjail *j); 66 static int rdtun_params(struct cfjail *j, int dofail); 67 static void running_jid(struct cfjail *j, int dflag); 68 static void jail_quoted_warnx(const struct cfjail *j, const char *name_msg, 69 const char *noname_msg); 70 static int jailparam_set_note(const struct cfjail *j, struct jailparam *jp, 71 unsigned njp, int flags); 72 static void print_jail(FILE *fp, struct cfjail *j, int oldcl); 73 static void print_param(FILE *fp, const struct cfparam *p, int sep, int doname); 74 static void quoted_print(FILE *fp, char *str); 75 static void usage(void); 76 77 static struct permspec perm_sysctl[] = { 78 { "security.jail.set_hostname_allowed", KP_ALLOW_SET_HOSTNAME, 0 }, 79 { "security.jail.sysvipc_allowed", KP_ALLOW_SYSVIPC, 0 }, 80 { "security.jail.allow_raw_sockets", KP_ALLOW_RAW_SOCKETS, 0 }, 81 { "security.jail.chflags_allowed", KP_ALLOW_CHFLAGS, 0 }, 82 { "security.jail.mount_allowed", KP_ALLOW_MOUNT, 0 }, 83 { "security.jail.socket_unixiproute_only", KP_ALLOW_SOCKET_AF, 1 }, 84 }; 85 86 static const enum intparam startcommands[] = { 87 IP__NULL, 88 #ifdef INET 89 IP__IP4_IFADDR, 90 #endif 91 #ifdef INET6 92 IP__IP6_IFADDR, 93 #endif 94 IP_MOUNT, 95 IP__MOUNT_FROM_FSTAB, 96 IP_MOUNT_DEVFS, 97 IP_MOUNT_FDESCFS, 98 IP_MOUNT_PROCFS, 99 IP_EXEC_PRESTART, 100 IP__OP, 101 IP_EXEC_CREATED, 102 IP_VNET_INTERFACE, 103 IP_EXEC_START, 104 IP_COMMAND, 105 IP_EXEC_POSTSTART, 106 IP__NULL 107 }; 108 109 static const enum intparam stopcommands[] = { 110 IP__NULL, 111 IP_EXEC_PRESTOP, 112 IP_EXEC_STOP, 113 IP_STOP_TIMEOUT, 114 IP__OP, 115 IP_EXEC_POSTSTOP, 116 IP_MOUNT_PROCFS, 117 IP_MOUNT_FDESCFS, 118 IP_MOUNT_DEVFS, 119 IP__MOUNT_FROM_FSTAB, 120 IP_MOUNT, 121 #ifdef INET6 122 IP__IP6_IFADDR, 123 #endif 124 #ifdef INET 125 IP__IP4_IFADDR, 126 #endif 127 IP__NULL 128 }; 129 130 int 131 main(int argc, char **argv) 132 { 133 struct stat st; 134 FILE *jfp; 135 struct cfjail *j; 136 char *JidFile; 137 size_t sysvallen; 138 unsigned op, pi; 139 int ch, docf, error, i, oldcl, sysval; 140 int dflag, Rflag; 141 #if defined(INET) || defined(INET6) 142 char *cs, *ncs; 143 #endif 144 #if defined(INET) && defined(INET6) 145 struct in6_addr addr6; 146 #endif 147 148 op = 0; 149 dflag = Rflag = 0; 150 docf = 1; 151 cfname = CONF_FILE; 152 JidFile = NULL; 153 154 while ((ch = getopt(argc, argv, "cdf:hiJ:lmn:p:qrRs:u:U:v")) != -1) { 155 switch (ch) { 156 case 'c': 157 op |= JF_START; 158 break; 159 case 'd': 160 dflag = 1; 161 break; 162 case 'f': 163 cfname = optarg; 164 break; 165 case 'h': 166 #if defined(INET) || defined(INET6) 167 add_param(NULL, NULL, IP_IP_HOSTNAME, NULL); 168 #endif 169 docf = 0; 170 break; 171 case 'i': 172 iflag = 1; 173 verbose = -1; 174 break; 175 case 'J': 176 JidFile = optarg; 177 break; 178 case 'l': 179 add_param(NULL, NULL, IP_EXEC_CLEAN, NULL); 180 docf = 0; 181 break; 182 case 'm': 183 op |= JF_SET; 184 break; 185 case 'n': 186 add_param(NULL, NULL, KP_NAME, optarg); 187 docf = 0; 188 break; 189 case 'p': 190 paralimit = strtol(optarg, NULL, 10); 191 if (paralimit == 0) 192 paralimit = -1; 193 break; 194 case 'q': 195 verbose = -1; 196 break; 197 case 'r': 198 op |= JF_STOP; 199 break; 200 case 'R': 201 op |= JF_STOP; 202 Rflag = 1; 203 break; 204 case 's': 205 add_param(NULL, NULL, KP_SECURELEVEL, optarg); 206 docf = 0; 207 break; 208 case 'u': 209 add_param(NULL, NULL, IP_EXEC_JAIL_USER, optarg); 210 add_param(NULL, NULL, IP_EXEC_SYSTEM_JAIL_USER, NULL); 211 docf = 0; 212 break; 213 case 'U': 214 add_param(NULL, NULL, IP_EXEC_JAIL_USER, optarg); 215 add_param(NULL, NULL, IP_EXEC_SYSTEM_JAIL_USER, 216 "false"); 217 docf = 0; 218 break; 219 case 'v': 220 verbose = 1; 221 break; 222 default: 223 usage(); 224 } 225 } 226 argc -= optind; 227 argv += optind; 228 229 /* Find out which of the four command line styles this is. */ 230 oldcl = 0; 231 if (!op) { 232 /* Old-style command line with four fixed parameters */ 233 if (argc < 4 || argv[0][0] != '/') 234 usage(); 235 op = JF_START; 236 docf = 0; 237 oldcl = 1; 238 add_param(NULL, NULL, KP_PATH, argv[0]); 239 add_param(NULL, NULL, KP_HOST_HOSTNAME, argv[1]); 240 #if defined(INET) || defined(INET6) 241 if (argv[2][0] != '\0') { 242 for (cs = argv[2];; cs = ncs + 1) { 243 ncs = strchr(cs, ','); 244 if (ncs) 245 *ncs = '\0'; 246 add_param(NULL, NULL, 247 #if defined(INET) && defined(INET6) 248 inet_pton(AF_INET6, cs, &addr6) == 1 249 ? KP_IP6_ADDR : KP_IP4_ADDR, 250 #elif defined(INET) 251 KP_IP4_ADDR, 252 #elif defined(INET6) 253 KP_IP6_ADDR, 254 #endif 255 cs); 256 if (!ncs) 257 break; 258 } 259 } 260 #endif 261 for (i = 3; i < argc; i++) 262 add_param(NULL, NULL, IP_COMMAND, argv[i]); 263 /* Emulate the defaults from security.jail.* sysctls. */ 264 sysvallen = sizeof(sysval); 265 if (sysctlbyname("security.jail.jailed", &sysval, &sysvallen, 266 NULL, 0) == 0 && sysval == 0) { 267 for (pi = 0; pi < sizeof(perm_sysctl) / 268 sizeof(perm_sysctl[0]); pi++) { 269 sysvallen = sizeof(sysval); 270 if (sysctlbyname(perm_sysctl[pi].name, 271 &sysval, &sysvallen, NULL, 0) == 0) 272 add_param(NULL, NULL, 273 perm_sysctl[pi].ipnum, 274 (sysval ? 1 : 0) ^ 275 perm_sysctl[pi].rev 276 ? NULL : "false"); 277 } 278 } 279 } else if (op == JF_STOP) { 280 /* Jail remove, perhaps using the config file */ 281 if (!docf || argc == 0) 282 usage(); 283 if (!Rflag) 284 for (i = 0; i < argc; i++) 285 if (strchr(argv[i], '=')) 286 usage(); 287 if ((docf = !Rflag && 288 (!strcmp(cfname, "-") || stat(cfname, &st) == 0))) 289 load_config(); 290 note_remove = docf || argc > 1 || wild_jail_name(argv[0]); 291 } else if (argc > 1 || (argc == 1 && strchr(argv[0], '='))) { 292 /* Single jail specified on the command line */ 293 if (Rflag) 294 usage(); 295 docf = 0; 296 for (i = 0; i < argc; i++) { 297 if (!strncmp(argv[i], "command", 7) && 298 (argv[i][7] == '\0' || argv[i][7] == '=')) { 299 if (argv[i][7] == '=') 300 add_param(NULL, NULL, IP_COMMAND, 301 argv[i] + 8); 302 for (i++; i < argc; i++) 303 add_param(NULL, NULL, IP_COMMAND, 304 argv[i]); 305 } 306 #ifdef INET 307 else if (!strncmp(argv[i], "ip4.addr=", 9)) { 308 for (cs = argv[i] + 9;; cs = ncs + 1) { 309 ncs = strchr(cs, ','); 310 if (ncs) 311 *ncs = '\0'; 312 add_param(NULL, NULL, KP_IP4_ADDR, cs); 313 if (!ncs) 314 break; 315 } 316 } 317 #endif 318 #ifdef INET6 319 else if (!strncmp(argv[i], "ip6.addr=", 9)) { 320 for (cs = argv[i] + 9;; cs = ncs + 1) { 321 ncs = strchr(cs, ','); 322 if (ncs) 323 *ncs = '\0'; 324 add_param(NULL, NULL, KP_IP6_ADDR, cs); 325 if (!ncs) 326 break; 327 } 328 } 329 #endif 330 else 331 add_param(NULL, NULL, 0, argv[i]); 332 } 333 } else { 334 /* From the config file, perhaps with a specified jail */ 335 if (Rflag || !docf) 336 usage(); 337 load_config(); 338 } 339 340 /* Find out which jails will be run. */ 341 dep_setup(docf); 342 error = 0; 343 if (op == JF_STOP) { 344 for (i = 0; i < argc; i++) 345 if (start_state(argv[i], docf, op, Rflag) < 0) 346 error = 1; 347 } else { 348 if (start_state(argv[0], docf, op, 0) < 0) 349 exit(1); 350 } 351 352 jfp = NULL; 353 if (JidFile != NULL) { 354 jfp = fopen(JidFile, "w"); 355 if (jfp == NULL) 356 err(1, "open %s", JidFile); 357 setlinebuf(jfp); 358 } 359 setlinebuf(stdout); 360 361 /* 362 * The main loop: Get an available jail and perform the required 363 * operation on it. When that is done, the jail may be finished, 364 * or it may go back for the next step. 365 */ 366 while ((j = next_jail())) 367 { 368 if (j->flags & JF_FAILED) { 369 error = 1; 370 if (j->comparam == NULL) { 371 dep_done(j, 0); 372 continue; 373 } 374 } 375 if (!(j->flags & JF_PARAMS)) 376 { 377 j->flags |= JF_PARAMS; 378 if (dflag) 379 add_param(j, NULL, IP_ALLOW_DYING, NULL); 380 if (check_intparams(j) < 0) 381 continue; 382 if ((j->flags & (JF_START | JF_SET)) && 383 import_params(j) < 0) 384 continue; 385 } 386 if (!j->jid) 387 running_jid(j, 388 (j->flags & (JF_SET | JF_DEPEND)) == JF_SET 389 ? dflag || bool_param(j->intparams[IP_ALLOW_DYING]) 390 : 0); 391 if (finish_command(j)) 392 continue; 393 394 switch (j->flags & JF_OP_MASK) { 395 /* 396 * These operations just turn into a different op 397 * depending on the jail's current status. 398 */ 399 case JF_START_SET: 400 j->flags = j->jid < 0 ? JF_START : JF_SET; 401 break; 402 case JF_SET_RESTART: 403 if (j->jid < 0) { 404 jail_quoted_warnx(j, "not found", 405 "no jail specified"); 406 failed(j); 407 continue; 408 } 409 j->flags = rdtun_params(j, 0) ? JF_RESTART : JF_SET; 410 if (j->flags == JF_RESTART) 411 dep_reset(j); 412 break; 413 case JF_START_SET_RESTART: 414 j->flags = j->jid < 0 ? JF_START 415 : rdtun_params(j, 0) ? JF_RESTART : JF_SET; 416 if (j->flags == JF_RESTART) 417 dep_reset(j); 418 } 419 420 switch (j->flags & JF_OP_MASK) { 421 case JF_START: 422 if (j->comparam == NULL) { 423 if (j->jid > 0 && 424 !(j->flags & (JF_DEPEND | JF_WILD))) { 425 jail_quoted_warnx(j, "already exists", 426 NULL); 427 failed(j); 428 continue; 429 } 430 if (dep_check(j)) 431 continue; 432 if (j->jid > 0) 433 goto jail_create_done; 434 j->comparam = startcommands; 435 j->comstring = NULL; 436 } 437 if (next_command(j)) 438 continue; 439 jail_create_done: 440 clear_persist(j); 441 if (jfp != NULL) 442 print_jail(jfp, j, oldcl); 443 dep_done(j, 0); 444 break; 445 446 case JF_SET: 447 if (j->jid < 0 && !(j->flags & JF_DEPEND)) { 448 jail_quoted_warnx(j, "not found", 449 "no jail specified"); 450 failed(j); 451 continue; 452 } 453 if (dep_check(j)) 454 continue; 455 if (!(j->flags & JF_DEPEND)) { 456 if (rdtun_params(j, 1) < 0 || 457 update_jail(j) < 0) 458 continue; 459 if (verbose >= 0 && (j->name || verbose > 0)) 460 jail_note(j, "updated\n"); 461 } 462 dep_done(j, 0); 463 break; 464 465 case JF_STOP: 466 case JF_RESTART: 467 if (j->comparam == NULL) { 468 if (dep_check(j)) 469 continue; 470 if (j->jid < 0) { 471 if (!(j->flags & (JF_DEPEND|JF_WILD))) { 472 if (verbose >= 0) 473 jail_quoted_warnx(j, 474 "not found", NULL); 475 failed(j); 476 } 477 goto jail_remove_done; 478 } 479 j->comparam = stopcommands; 480 j->comstring = NULL; 481 } else if ((j->flags & JF_FAILED) && j->jid > 0) 482 goto jail_remove_done; 483 if (next_command(j)) 484 continue; 485 jail_remove_done: 486 dep_done(j, 0); 487 if ((j->flags & (JF_START | JF_FAILED)) == JF_START) { 488 j->comparam = NULL; 489 j->flags &= ~JF_STOP; 490 dep_reset(j); 491 requeue(j, j->ndeps ? &depend : &ready); 492 } 493 break; 494 } 495 } 496 497 if (jfp != NULL) 498 fclose(jfp); 499 exit(error); 500 } 501 502 /* 503 * Mark a jail's failure for future handling. 504 */ 505 void 506 failed(struct cfjail *j) 507 { 508 j->flags |= JF_FAILED; 509 TAILQ_REMOVE(j->queue, j, tq); 510 TAILQ_INSERT_HEAD(&ready, j, tq); 511 j->queue = &ready; 512 } 513 514 /* 515 * Exit slightly more gracefully when out of memory. 516 */ 517 void * 518 emalloc(size_t size) 519 { 520 void *p; 521 522 p = malloc(size); 523 if (!p) 524 err(1, "malloc"); 525 return p; 526 } 527 528 void * 529 erealloc(void *ptr, size_t size) 530 { 531 void *p; 532 533 p = realloc(ptr, size); 534 if (!p) 535 err(1, "malloc"); 536 return p; 537 } 538 539 char * 540 estrdup(const char *str) 541 { 542 char *ns; 543 544 ns = strdup(str); 545 if (!ns) 546 err(1, "malloc"); 547 return ns; 548 } 549 550 /* 551 * Print a message including an optional jail name. 552 */ 553 void 554 jail_note(const struct cfjail *j, const char *fmt, ...) 555 { 556 va_list ap, tap; 557 char *cs; 558 size_t len; 559 560 va_start(ap, fmt); 561 va_copy(tap, ap); 562 len = vsnprintf(NULL, 0, fmt, tap); 563 va_end(tap); 564 cs = alloca(len + 1); 565 (void)vsnprintf(cs, len + 1, fmt, ap); 566 va_end(ap); 567 if (j->name) 568 printf("%s: %s", j->name, cs); 569 else 570 printf("%s", cs); 571 } 572 573 /* 574 * Print a warning message including an optional jail name. 575 */ 576 void 577 jail_warnx(const struct cfjail *j, const char *fmt, ...) 578 { 579 va_list ap, tap; 580 char *cs; 581 size_t len; 582 583 va_start(ap, fmt); 584 va_copy(tap, ap); 585 len = vsnprintf(NULL, 0, fmt, tap); 586 va_end(tap); 587 cs = alloca(len + 1); 588 (void)vsnprintf(cs, len + 1, fmt, ap); 589 va_end(ap); 590 if (j->name) 591 warnx("%s: %s", j->name, cs); 592 else 593 warnx("%s", cs); 594 } 595 596 /* 597 * Create a new jail. 598 */ 599 int 600 create_jail(struct cfjail *j) 601 { 602 struct iovec jiov[4]; 603 struct stat st; 604 struct jailparam *jp, *setparams, *setparams2, *sjp; 605 const char *path; 606 int dopersist, ns, jid, dying, didfail; 607 608 /* 609 * Check the jail's path, with a better error message than jail_set 610 * gives. 611 */ 612 if ((path = string_param(j->intparams[KP_PATH]))) { 613 if (j->name != NULL && path[0] != '/') { 614 jail_warnx(j, "path %s: not an absolute pathname", 615 path); 616 return -1; 617 } 618 if (stat(path, &st) < 0) { 619 jail_warnx(j, "path %s: %s", path, strerror(errno)); 620 return -1; 621 } 622 if (!S_ISDIR(st.st_mode)) { 623 jail_warnx(j, "path %s: %s", path, strerror(ENOTDIR)); 624 return -1; 625 } 626 } 627 628 /* 629 * Copy all the parameters, except that "persist" is always set when 630 * there are commands to run later. 631 */ 632 dopersist = !bool_param(j->intparams[KP_PERSIST]) && 633 (j->intparams[IP_EXEC_START] || j->intparams[IP_COMMAND] || 634 j->intparams[IP_EXEC_POSTSTART]); 635 sjp = setparams = 636 alloca((j->njp + dopersist) * sizeof(struct jailparam)); 637 if (dopersist && jailparam_init(sjp++, "persist") < 0) { 638 jail_warnx(j, "%s", jail_errmsg); 639 return -1; 640 } 641 for (jp = j->jp; jp < j->jp + j->njp; jp++) 642 if (!dopersist || !equalopts(jp->jp_name, "persist")) 643 *sjp++ = *jp; 644 ns = sjp - setparams; 645 646 didfail = 0; 647 j->jid = jailparam_set_note(j, setparams, ns, JAIL_CREATE); 648 if (j->jid < 0 && errno == EEXIST && 649 bool_param(j->intparams[IP_ALLOW_DYING]) && 650 int_param(j->intparams[KP_JID], &jid) && jid != 0) { 651 /* 652 * The jail already exists, but may be dying. 653 * Make sure it is, in which case an update is appropriate. 654 */ 655 jiov[0].iov_base = __DECONST(char *, "jid"); 656 jiov[0].iov_len = sizeof("jid"); 657 jiov[1].iov_base = &jid; 658 jiov[1].iov_len = sizeof(jid); 659 jiov[2].iov_base = __DECONST(char *, "dying"); 660 jiov[2].iov_len = sizeof("dying"); 661 jiov[3].iov_base = &dying; 662 jiov[3].iov_len = sizeof(dying); 663 if (jail_get(jiov, 4, JAIL_DYING) < 0) { 664 /* 665 * It could be that the jail just barely finished 666 * dying, or it could be that the jid never existed 667 * but the name does. In either case, another try 668 * at creating the jail should do the right thing. 669 */ 670 if (errno == ENOENT) 671 j->jid = jailparam_set_note(j, setparams, ns, 672 JAIL_CREATE); 673 } else if (dying) { 674 j->jid = jid; 675 if (rdtun_params(j, 1) < 0) { 676 j->jid = -1; 677 didfail = 1; 678 } else { 679 sjp = setparams2 = alloca((j->njp + dopersist) * 680 sizeof(struct jailparam)); 681 for (jp = setparams; jp < setparams + ns; jp++) 682 if (!JP_RDTUN(jp) || 683 !strcmp(jp->jp_name, "jid")) 684 *sjp++ = *jp; 685 j->jid = jailparam_set_note(j, setparams2, 686 sjp - setparams2, JAIL_UPDATE | JAIL_DYING); 687 /* 688 * Again, perhaps the jail just finished dying. 689 */ 690 if (j->jid < 0 && errno == ENOENT) 691 j->jid = jailparam_set_note(j, 692 setparams, ns, JAIL_CREATE); 693 } 694 } 695 } 696 if (j->jid < 0 && !didfail) { 697 jail_warnx(j, "%s", jail_errmsg); 698 failed(j); 699 } 700 if (dopersist) { 701 jailparam_free(setparams, 1); 702 if (j->jid > 0) 703 j->flags |= JF_PERSIST; 704 } 705 return j->jid; 706 } 707 708 /* 709 * Remove a temporarily set "persist" parameter. 710 */ 711 static void 712 clear_persist(struct cfjail *j) 713 { 714 struct iovec jiov[4]; 715 int jid; 716 717 if (!(j->flags & JF_PERSIST)) 718 return; 719 j->flags &= ~JF_PERSIST; 720 jiov[0].iov_base = __DECONST(char *, "jid"); 721 jiov[0].iov_len = sizeof("jid"); 722 jiov[1].iov_base = &j->jid; 723 jiov[1].iov_len = sizeof(j->jid); 724 jiov[2].iov_base = __DECONST(char *, "nopersist"); 725 jiov[2].iov_len = sizeof("nopersist"); 726 jiov[3].iov_base = NULL; 727 jiov[3].iov_len = 0; 728 jid = jail_set(jiov, 4, JAIL_UPDATE); 729 if (verbose > 0) 730 jail_note(j, "jail_set(JAIL_UPDATE) jid=%d nopersist%s%s\n", 731 j->jid, jid < 0 ? ": " : "", 732 jid < 0 ? strerror(errno) : ""); 733 } 734 735 /* 736 * Set a jail's parameters. 737 */ 738 static int 739 update_jail(struct cfjail *j) 740 { 741 struct jailparam *jp, *setparams, *sjp; 742 int ns, jid; 743 744 ns = 0; 745 for (jp = j->jp; jp < j->jp + j->njp; jp++) 746 if (!JP_RDTUN(jp)) 747 ns++; 748 if (ns == 0) 749 return 0; 750 sjp = setparams = alloca(++ns * sizeof(struct jailparam)); 751 if (jailparam_init(sjp, "jid") < 0 || 752 jailparam_import_raw(sjp, &j->jid, sizeof j->jid) < 0) { 753 jail_warnx(j, "%s", jail_errmsg); 754 failed(j); 755 return -1; 756 } 757 for (jp = j->jp; jp < j->jp + j->njp; jp++) 758 if (!JP_RDTUN(jp)) 759 *++sjp = *jp; 760 761 jid = jailparam_set_note(j, setparams, ns, 762 bool_param(j->intparams[IP_ALLOW_DYING]) 763 ? JAIL_UPDATE | JAIL_DYING : JAIL_UPDATE); 764 if (jid < 0) { 765 jail_warnx(j, "%s", jail_errmsg); 766 failed(j); 767 } 768 jailparam_free(setparams, 1); 769 return jid; 770 } 771 772 /* 773 * Return if a jail set would change any create-only parameters. 774 */ 775 static int 776 rdtun_params(struct cfjail *j, int dofail) 777 { 778 struct jailparam *jp, *rtparams, *rtjp; 779 int nrt, rval; 780 781 if (j->flags & JF_RDTUN) 782 return 0; 783 j->flags |= JF_RDTUN; 784 nrt = 0; 785 for (jp = j->jp; jp < j->jp + j->njp; jp++) 786 if (JP_RDTUN(jp) && strcmp(jp->jp_name, "jid")) 787 nrt++; 788 if (nrt == 0) 789 return 0; 790 rtjp = rtparams = alloca(++nrt * sizeof(struct jailparam)); 791 if (jailparam_init(rtjp, "jid") < 0 || 792 jailparam_import_raw(rtjp, &j->jid, sizeof j->jid) < 0) { 793 jail_warnx(j, "%s", jail_errmsg); 794 exit(1); 795 } 796 for (jp = j->jp; jp < j->jp + j->njp; jp++) 797 if (JP_RDTUN(jp) && strcmp(jp->jp_name, "jid")) { 798 *++rtjp = *jp; 799 rtjp->jp_value = NULL; 800 } 801 rval = 0; 802 if (jailparam_get(rtparams, nrt, 803 bool_param(j->intparams[IP_ALLOW_DYING]) ? JAIL_DYING : 0) > 0) { 804 rtjp = rtparams + 1; 805 for (jp = j->jp; rtjp < rtparams + nrt; jp++) { 806 if (JP_RDTUN(jp) && strcmp(jp->jp_name, "jid")) { 807 if (!((jp->jp_flags & (JP_BOOL | JP_NOBOOL)) && 808 jp->jp_valuelen == 0 && 809 *(int *)jp->jp_value) && 810 !(rtjp->jp_valuelen == jp->jp_valuelen && 811 !((jp->jp_ctltype & CTLTYPE) == 812 CTLTYPE_STRING ? strncmp(rtjp->jp_value, 813 jp->jp_value, jp->jp_valuelen) : 814 memcmp(rtjp->jp_value, jp->jp_value, 815 jp->jp_valuelen)))) { 816 if (dofail) { 817 jail_warnx(j, "%s cannot be " 818 "changed after creation", 819 jp->jp_name); 820 failed(j); 821 rval = -1; 822 } else 823 rval = 1; 824 break; 825 } 826 rtjp++; 827 } 828 } 829 } 830 for (rtjp = rtparams + 1; rtjp < rtparams + nrt; rtjp++) 831 rtjp->jp_name = NULL; 832 jailparam_free(rtparams, nrt); 833 return rval; 834 } 835 836 /* 837 * Get the jail's jid if it is running. 838 */ 839 static void 840 running_jid(struct cfjail *j, int dflag) 841 { 842 struct iovec jiov[2]; 843 const char *pval; 844 char *ep; 845 int jid; 846 847 if ((pval = string_param(j->intparams[KP_JID]))) { 848 if (!(jid = strtol(pval, &ep, 10)) || *ep) { 849 j->jid = -1; 850 return; 851 } 852 jiov[0].iov_base = __DECONST(char *, "jid"); 853 jiov[0].iov_len = sizeof("jid"); 854 jiov[1].iov_base = &jid; 855 jiov[1].iov_len = sizeof(jid); 856 } else if ((pval = string_param(j->intparams[KP_NAME]))) { 857 jiov[0].iov_base = __DECONST(char *, "name"); 858 jiov[0].iov_len = sizeof("name"); 859 jiov[1].iov_len = strlen(pval) + 1; 860 jiov[1].iov_base = alloca(jiov[1].iov_len); 861 strcpy(jiov[1].iov_base, pval); 862 } else { 863 j->jid = -1; 864 return; 865 } 866 j->jid = jail_get(jiov, 2, dflag ? JAIL_DYING : 0); 867 } 868 869 static void 870 jail_quoted_warnx(const struct cfjail *j, const char *name_msg, 871 const char *noname_msg) 872 { 873 const char *pval; 874 875 if ((pval = j->name) || (pval = string_param(j->intparams[KP_JID])) || 876 (pval = string_param(j->intparams[KP_NAME]))) 877 warnx("\"%s\" %s", pval, name_msg); 878 else 879 warnx("%s", noname_msg); 880 } 881 882 /* 883 * Set jail parameters and possibly print them out. 884 */ 885 static int 886 jailparam_set_note(const struct cfjail *j, struct jailparam *jp, unsigned njp, 887 int flags) 888 { 889 char *value; 890 int jid; 891 unsigned i; 892 893 jid = jailparam_set(jp, njp, flags); 894 if (verbose > 0) { 895 jail_note(j, "jail_set(%s%s)", 896 (flags & (JAIL_CREATE | JAIL_UPDATE)) == JAIL_CREATE 897 ? "JAIL_CREATE" : "JAIL_UPDATE", 898 (flags & JAIL_DYING) ? " | JAIL_DYING" : ""); 899 for (i = 0; i < njp; i++) { 900 printf(" %s", jp[i].jp_name); 901 if (jp[i].jp_value == NULL) 902 continue; 903 putchar('='); 904 value = jailparam_export(jp + i); 905 if (value == NULL) 906 err(1, "jailparam_export"); 907 quoted_print(stdout, value); 908 free(value); 909 } 910 if (jid < 0) 911 printf(": %s", strerror(errno)); 912 printf("\n"); 913 } 914 return jid; 915 } 916 917 /* 918 * Print a jail record. 919 */ 920 static void 921 print_jail(FILE *fp, struct cfjail *j, int oldcl) 922 { 923 struct cfparam *p; 924 925 if (oldcl) { 926 fprintf(fp, "%d\t", j->jid); 927 print_param(fp, j->intparams[KP_PATH], ',', 0); 928 putc('\t', fp); 929 print_param(fp, j->intparams[KP_HOST_HOSTNAME], ',', 0); 930 putc('\t', fp); 931 #ifdef INET 932 print_param(fp, j->intparams[KP_IP4_ADDR], ',', 0); 933 #ifdef INET6 934 if (j->intparams[KP_IP4_ADDR] && 935 !TAILQ_EMPTY(&j->intparams[KP_IP4_ADDR]->val) && 936 j->intparams[KP_IP6_ADDR] && 937 !TAILQ_EMPTY(&j->intparams[KP_IP6_ADDR]->val)) 938 putc(',', fp); 939 #endif 940 #endif 941 #ifdef INET6 942 print_param(fp, j->intparams[KP_IP6_ADDR], ',', 0); 943 #endif 944 putc('\t', fp); 945 print_param(fp, j->intparams[IP_COMMAND], ' ', 0); 946 } else { 947 fprintf(fp, "jid=%d", j->jid); 948 TAILQ_FOREACH(p, &j->params, tq) 949 if (strcmp(p->name, "jid")) { 950 putc(' ', fp); 951 print_param(fp, p, ',', 1); 952 } 953 } 954 putc('\n', fp); 955 } 956 957 /* 958 * Print a parameter value, or a name=value pair. 959 */ 960 static void 961 print_param(FILE *fp, const struct cfparam *p, int sep, int doname) 962 { 963 const struct cfstring *s, *ts; 964 965 if (doname) 966 fputs(p->name, fp); 967 if (p == NULL || TAILQ_EMPTY(&p->val)) 968 return; 969 if (doname) 970 putc('=', fp); 971 TAILQ_FOREACH_SAFE(s, &p->val, tq, ts) { 972 quoted_print(fp, s->s); 973 if (ts != NULL) 974 putc(sep, fp); 975 } 976 } 977 978 /* 979 * Print a string with quotes around spaces. 980 */ 981 static void 982 quoted_print(FILE *fp, char *str) 983 { 984 int c, qc; 985 char *p = str; 986 987 qc = !*p ? '"' 988 : strchr(p, '\'') ? '"' 989 : strchr(p, '"') ? '\'' 990 : strchr(p, ' ') || strchr(p, '\t') ? '"' 991 : 0; 992 if (qc) 993 putc(qc, fp); 994 while ((c = *p++)) { 995 if (c == '\\' || c == qc) 996 putc('\\', fp); 997 putc(c, fp); 998 } 999 if (qc) 1000 putc(qc, fp); 1001 } 1002 1003 static void 1004 usage(void) 1005 { 1006 1007 (void)fprintf(stderr, 1008 "usage: jail [-dhilqv] [-J jid_file] [-u username] [-U username]\n" 1009 " -[cmr] param=value ... [command=command ...]\n" 1010 " jail [-dqv] [-f file] -[cmr] [jail]\n" 1011 " jail [-qv] [-f file] -[rR] ['*' | jail ...]\n" 1012 " jail [-dhilqv] [-J jid_file] [-u username] [-U username]\n" 1013 " [-n jailname] [-s securelevel]\n" 1014 " path hostname [ip[,...]] command ...\n"); 1015 exit(1); 1016 } 1017