1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1989, 1993, 1994 5 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #define _WANT_MNTOPTNAMES 34 #include <sys/mount.h> 35 #include <sys/stat.h> 36 #include <sys/wait.h> 37 38 #include <ctype.h> 39 40 #include <errno.h> 41 #include <fstab.h> 42 #include <paths.h> 43 #include <pwd.h> 44 #include <signal.h> 45 #include <stdint.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 #include <libutil.h> 51 #include <libxo/xo.h> 52 53 #include "extern.h" 54 #include "mntopts.h" 55 #include "pathnames.h" 56 57 #define EXIT(a) { \ 58 xo_close_container("mount"); \ 59 if (xo_finish() < 0) \ 60 xo_err(EXIT_FAILURE, "stdout"); \ 61 exit(a); \ 62 } 63 64 /* `meta' options */ 65 #define MOUNT_META_OPTION_FSTAB "fstab" 66 #define MOUNT_META_OPTION_CURRENT "current" 67 68 static int debug, fstab_style, verbose; 69 70 struct cpa { 71 char **a; 72 ssize_t sz; 73 int c; 74 }; 75 76 char *catopt(char *, const char *); 77 int hasopt(const char *, const char *); 78 int ismounted(struct fstab *, struct statfs *, int); 79 int isremountable(const char *); 80 int allow_file_mount(const char *); 81 void mangle(char *, struct cpa *); 82 char *update_options(char *, char *, int); 83 int mountfs(const char *, const char *, const char *, 84 int, const char *, const char *); 85 void remopt(char *, const char *); 86 void prmount(struct statfs *); 87 void putfsent(struct statfs *); 88 void usage(void); 89 char *flags2opts(int); 90 91 /* Map from mount options to printable formats. */ 92 static struct mntoptnames optnames[] = { 93 MNTOPT_NAMES 94 }; 95 96 /* 97 * List of VFS types that can be remounted without becoming mounted on top 98 * of each other. 99 * XXX Is this list correct? 100 */ 101 static const char * 102 remountable_fs_names[] = { 103 "ufs", "ffs", "ext2fs", 104 0 105 }; 106 107 static const char userquotaeq[] = "userquota="; 108 static const char groupquotaeq[] = "groupquota="; 109 110 static char *mountprog = NULL; 111 112 static int 113 use_mountprog(const char *vfstype) 114 { 115 /* XXX: We need to get away from implementing external mount 116 * programs for every filesystem, and move towards having 117 * each filesystem properly implement the nmount() system call. 118 */ 119 unsigned int i; 120 const char *fs[] = { 121 "cd9660", "mfs", "msdosfs", "nfs", 122 "nullfs", "smbfs", "udf", "unionfs", 123 NULL 124 }; 125 126 if (mountprog != NULL) 127 return (1); 128 129 for (i = 0; fs[i] != NULL; ++i) { 130 if (strcmp(vfstype, fs[i]) == 0) 131 return (1); 132 } 133 134 return (0); 135 } 136 137 static int 138 exec_mountprog(const char *name, const char *execname, char *const argv[]) 139 { 140 pid_t pid; 141 int status; 142 143 switch (pid = fork()) { 144 case -1: /* Error. */ 145 xo_warn("fork"); 146 EXIT(EXIT_FAILURE); 147 case 0: /* Child. */ 148 /* Go find an executable. */ 149 execvP(execname, _PATH_SYSPATH, argv); 150 if (errno == ENOENT) { 151 xo_warn("exec %s not found", execname); 152 if (execname[0] != '/') { 153 xo_warnx("in path: %s", _PATH_SYSPATH); 154 } 155 } 156 EXIT(EXIT_FAILURE); 157 default: /* Parent. */ 158 if (waitpid(pid, &status, 0) < 0) { 159 xo_warn("waitpid"); 160 return (1); 161 } 162 163 if (WIFEXITED(status)) { 164 if (WEXITSTATUS(status) != 0) 165 return (WEXITSTATUS(status)); 166 } else if (WIFSIGNALED(status)) { 167 xo_warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 168 return (1); 169 } 170 break; 171 } 172 173 return (0); 174 } 175 176 static int 177 specified_ro(const char *arg) 178 { 179 char *optbuf, *opt; 180 int ret = 0; 181 182 optbuf = strdup(arg); 183 if (optbuf == NULL) 184 xo_err(1, "strdup failed"); 185 186 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 187 if (strcmp(opt, "ro") == 0) { 188 ret = 1; 189 break; 190 } 191 } 192 free(optbuf); 193 return (ret); 194 } 195 196 static void 197 restart_mountd(void) 198 { 199 200 pidfile_signal(_PATH_MOUNTDPID, SIGHUP, NULL); 201 } 202 203 int 204 main(int argc, char *argv[]) 205 { 206 const char *mntfromname, **vfslist, *vfstype; 207 struct fstab *fs; 208 struct statfs *mntbuf; 209 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro; 210 int onlylate; 211 char *cp, *ep, *options; 212 213 all = init_flags = late = onlylate = 0; 214 ro = 0; 215 options = NULL; 216 vfslist = NULL; 217 vfstype = "ufs"; 218 219 argc = xo_parse_args(argc, argv); 220 if (argc < 0) 221 exit(EXIT_FAILURE); 222 xo_open_container("mount"); 223 224 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1) 225 switch (ch) { 226 case 'a': 227 all = 1; 228 break; 229 case 'd': 230 debug = 1; 231 break; 232 case 'F': 233 setfstab(optarg); 234 break; 235 case 'f': 236 init_flags |= MNT_FORCE; 237 break; 238 case 'L': 239 onlylate = 1; 240 late = 1; 241 break; 242 case 'l': 243 late = 1; 244 break; 245 case 'n': 246 /* For compatibility with the Linux version of mount. */ 247 break; 248 case 'o': 249 if (*optarg) { 250 options = catopt(options, optarg); 251 if (specified_ro(optarg)) 252 ro = 1; 253 } 254 break; 255 case 'p': 256 fstab_style = 1; 257 verbose = 1; 258 break; 259 case 'r': 260 options = catopt(options, "ro"); 261 ro = 1; 262 break; 263 case 't': 264 if (vfslist != NULL) 265 xo_errx(1, "only one -t option may be specified"); 266 vfslist = makevfslist(optarg); 267 vfstype = optarg; 268 break; 269 case 'u': 270 init_flags |= MNT_UPDATE; 271 break; 272 case 'v': 273 verbose = 1; 274 break; 275 case 'w': 276 options = catopt(options, "noro"); 277 break; 278 case '?': 279 default: 280 usage(); 281 /* NOTREACHED */ 282 } 283 argc -= optind; 284 argv += optind; 285 286 #define BADTYPE(type) \ 287 (strcmp(type, FSTAB_RO) && \ 288 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 289 290 if ((init_flags & MNT_UPDATE) && (ro == 0)) 291 options = catopt(options, "noro"); 292 293 rval = EXIT_SUCCESS; 294 switch (argc) { 295 case 0: 296 if ((mntsize = getmntinfo(&mntbuf, 297 verbose ? MNT_WAIT : MNT_NOWAIT)) == 0) 298 xo_err(1, "getmntinfo"); 299 if (all) { 300 while ((fs = getfsent()) != NULL) { 301 if (BADTYPE(fs->fs_type)) 302 continue; 303 if (checkvfsname(fs->fs_vfstype, vfslist)) 304 continue; 305 if (hasopt(fs->fs_mntops, "noauto")) 306 continue; 307 if (!hasopt(fs->fs_mntops, "late") && onlylate) 308 continue; 309 if (hasopt(fs->fs_mntops, "late") && !late) 310 continue; 311 if (hasopt(fs->fs_mntops, "failok")) 312 failok = 1; 313 else 314 failok = 0; 315 if (!(init_flags & MNT_UPDATE) && 316 !hasopt(fs->fs_mntops, "update") && 317 ismounted(fs, mntbuf, mntsize)) 318 continue; 319 options = update_options(options, fs->fs_mntops, 320 mntbuf->f_flags); 321 if (mountfs(fs->fs_vfstype, fs->fs_spec, 322 fs->fs_file, init_flags, options, 323 fs->fs_mntops) && !failok) 324 rval = EXIT_FAILURE; 325 } 326 } else if (fstab_style) { 327 xo_open_list("fstab"); 328 for (i = 0; i < mntsize; i++) { 329 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 330 continue; 331 xo_open_instance("fstab"); 332 putfsent(&mntbuf[i]); 333 xo_close_instance("fstab"); 334 } 335 xo_close_list("fstab"); 336 } else { 337 xo_open_list("mounted"); 338 for (i = 0; i < mntsize; i++) { 339 if (checkvfsname(mntbuf[i].f_fstypename, 340 vfslist)) 341 continue; 342 if (!verbose && 343 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 344 continue; 345 xo_open_instance("mounted"); 346 prmount(&mntbuf[i]); 347 xo_close_instance("mounted"); 348 } 349 xo_close_list("mounted"); 350 } 351 EXIT(rval); 352 case 1: 353 if (vfslist != NULL) 354 usage(); 355 356 rmslashes(*argv, *argv); 357 if (init_flags & MNT_UPDATE) { 358 mntfromname = NULL; 359 have_fstab = 0; 360 if ((mntbuf = getmntpoint(*argv)) == NULL) 361 xo_errx(1, "not currently mounted %s", *argv); 362 /* 363 * Only get the mntflags from fstab if both mntpoint 364 * and mntspec are identical. Also handle the special 365 * case where just '/' is mounted and 'spec' is not 366 * identical with the one from fstab ('/dev' is missing 367 * in the spec-string at boot-time). 368 */ 369 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 370 if (strcmp(fs->fs_spec, 371 mntbuf->f_mntfromname) == 0 && 372 strcmp(fs->fs_file, 373 mntbuf->f_mntonname) == 0) { 374 have_fstab = 1; 375 mntfromname = mntbuf->f_mntfromname; 376 } else if (argv[0][0] == '/' && 377 argv[0][1] == '\0' && 378 strcmp(fs->fs_vfstype, 379 mntbuf->f_fstypename) == 0) { 380 fs = getfsfile("/"); 381 have_fstab = 1; 382 mntfromname = fs->fs_spec; 383 } 384 } 385 if (have_fstab) { 386 options = update_options(options, fs->fs_mntops, 387 mntbuf->f_flags); 388 } else { 389 mntfromname = mntbuf->f_mntfromname; 390 options = update_options(options, NULL, 391 mntbuf->f_flags); 392 } 393 rval = mountfs(mntbuf->f_fstypename, mntfromname, 394 mntbuf->f_mntonname, init_flags, options, 0); 395 break; 396 } 397 if ((fs = getfsfile(*argv)) == NULL && 398 (fs = getfsspec(*argv)) == NULL) 399 xo_errx(1, "%s: unknown special file or file system", 400 *argv); 401 if (BADTYPE(fs->fs_type)) 402 xo_errx(1, "%s has unknown file system type", 403 *argv); 404 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 405 init_flags, options, fs->fs_mntops); 406 break; 407 case 2: 408 /* 409 * If -t flag has not been specified, the path cannot be 410 * found, spec contains either a ':' or a '@', then assume 411 * that an NFS file system is being specified ala Sun. 412 * Check if the hostname contains only allowed characters 413 * to reduce false positives. IPv6 addresses containing 414 * ':' will be correctly parsed only if the separator is '@'. 415 * The definition of a valid hostname is taken from RFC 1034. 416 */ 417 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 418 (ep = strchr(argv[0], ':')) != NULL)) { 419 if (*ep == '@') { 420 cp = ep + 1; 421 ep = cp + strlen(cp); 422 } else 423 cp = argv[0]; 424 while (cp != ep) { 425 if (!isdigit(*cp) && !isalpha(*cp) && 426 *cp != '.' && *cp != '-' && *cp != ':') 427 break; 428 cp++; 429 } 430 if (cp == ep) 431 vfstype = "nfs"; 432 } 433 rval = mountfs(vfstype, 434 argv[0], argv[1], init_flags, options, NULL); 435 break; 436 default: 437 usage(); 438 /* NOTREACHED */ 439 } 440 441 /* 442 * If the mount was successfully, and done by root, tell mountd the 443 * good news. 444 */ 445 if (rval == EXIT_SUCCESS && getuid() == 0) 446 restart_mountd(); 447 448 EXIT(rval); 449 } 450 451 int 452 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 453 { 454 char realfsfile[PATH_MAX]; 455 int i; 456 457 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 458 /* the root file system can always be remounted */ 459 return (0); 460 461 /* The user may have specified a symlink in fstab, resolve the path */ 462 if (realpath(fs->fs_file, realfsfile) == NULL) { 463 /* Cannot resolve the path, use original one */ 464 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 465 } 466 467 /* 468 * Consider the filesystem to be mounted if: 469 * It has the same mountpoint as a mounted filesystem, and 470 * It has the same type as that same mounted filesystem, and 471 * It has the same device name as that same mounted filesystem, OR 472 * It is a nonremountable filesystem 473 */ 474 for (i = mntsize - 1; i >= 0; --i) 475 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 476 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 && 477 (!isremountable(fs->fs_vfstype) || 478 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))) 479 return (1); 480 return (0); 481 } 482 483 int 484 isremountable(const char *vfsname) 485 { 486 const char **cp; 487 488 for (cp = remountable_fs_names; *cp; cp++) 489 if (strcmp(*cp, vfsname) == 0) 490 return (1); 491 return (0); 492 } 493 494 int 495 allow_file_mount(const char *vfsname) 496 { 497 498 if (strcmp(vfsname, "nullfs") == 0) 499 return (1); 500 return (0); 501 } 502 503 int 504 hasopt(const char *mntopts, const char *option) 505 { 506 int negative, found; 507 char *opt, *optbuf; 508 509 if (option[0] == 'n' && option[1] == 'o') { 510 negative = 1; 511 option += 2; 512 } else 513 negative = 0; 514 optbuf = strdup(mntopts); 515 found = 0; 516 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 517 if (opt[0] == 'n' && opt[1] == 'o') { 518 if (!strcasecmp(opt + 2, option)) 519 found = negative; 520 } else if (!strcasecmp(opt, option)) 521 found = !negative; 522 } 523 free(optbuf); 524 return (found); 525 } 526 527 static void 528 append_arg(struct cpa *sa, char *arg) 529 { 530 if (sa->c + 1 == sa->sz) { 531 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 532 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz); 533 if (sa->a == NULL) 534 xo_errx(1, "realloc failed"); 535 } 536 sa->a[++sa->c] = arg; 537 } 538 539 int 540 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 541 const char *options, const char *mntopts) 542 { 543 struct statfs sf; 544 int i, ret; 545 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 546 static struct cpa mnt_argv; 547 548 /* resolve the mountpoint with realpath(3) */ 549 if (allow_file_mount(vfstype)) { 550 if (checkpath_allow_file(name, mntpath) != 0) { 551 xo_warn("%s", mntpath); 552 return (1); 553 } 554 } else { 555 if (checkpath(name, mntpath) != 0) { 556 xo_warn("%s", mntpath); 557 return (1); 558 } 559 } 560 name = mntpath; 561 562 if (mntopts == NULL) 563 mntopts = ""; 564 optbuf = catopt(strdup(mntopts), options); 565 566 if (strcmp(name, "/") == 0) 567 flags |= MNT_UPDATE; 568 if (flags & MNT_FORCE) 569 optbuf = catopt(optbuf, "force"); 570 if (flags & MNT_RDONLY) 571 optbuf = catopt(optbuf, "ro"); 572 /* 573 * XXX 574 * The mount_mfs (newfs) command uses -o to select the 575 * optimization mode. We don't pass the default "-o rw" 576 * for that reason. 577 */ 578 if (flags & MNT_UPDATE) 579 optbuf = catopt(optbuf, "update"); 580 581 /* Compatibility glue. */ 582 if (strcmp(vfstype, "msdos") == 0) 583 vfstype = "msdosfs"; 584 585 /* Construct the name of the appropriate mount command */ 586 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 587 588 mnt_argv.c = -1; 589 append_arg(&mnt_argv, execname); 590 mangle(optbuf, &mnt_argv); 591 if (mountprog != NULL) 592 strlcpy(execname, mountprog, sizeof(execname)); 593 594 append_arg(&mnt_argv, strdup(spec)); 595 append_arg(&mnt_argv, strdup(name)); 596 append_arg(&mnt_argv, NULL); 597 598 if (debug) { 599 if (use_mountprog(vfstype)) 600 xo_emit("{Lwc:exec}{:execname/%s}", execname); 601 else 602 xo_emit("{:execname/mount}{P: }{l:opts/-t}{P: }{l:opts/%s}", vfstype); 603 for (i = 1; i < mnt_argv.c; i++) 604 xo_emit("{P: }{l:opts}", mnt_argv.a[i]); 605 xo_emit("\n"); 606 free(optbuf); 607 free(mountprog); 608 mountprog = NULL; 609 return (0); 610 } 611 612 if (use_mountprog(vfstype)) { 613 ret = exec_mountprog(name, execname, mnt_argv.a); 614 } else { 615 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 616 } 617 618 free(optbuf); 619 free(mountprog); 620 mountprog = NULL; 621 622 if (verbose) { 623 if (statfs(name, &sf) < 0) { 624 xo_warn("statfs %s", name); 625 return (1); 626 } 627 if (fstab_style) { 628 xo_open_list("fstab"); 629 xo_open_instance("fstab"); 630 putfsent(&sf); 631 xo_close_instance("fstab"); 632 xo_close_list("fstab"); 633 } else { 634 xo_open_list("mounted"); 635 xo_open_instance("mounted"); 636 prmount(&sf); 637 xo_close_instance("mounted"); 638 xo_close_list("mounted"); 639 } 640 } 641 642 return (ret); 643 } 644 645 void 646 prmount(struct statfs *sfp) 647 { 648 uint64_t flags; 649 unsigned int i; 650 struct mntoptnames *o; 651 struct passwd *pw; 652 char *fsidbuf; 653 654 xo_emit("{:special/%hs}{L: on }{:node/%hs}{L: (}{:fstype}", sfp->f_mntfromname, 655 sfp->f_mntonname, sfp->f_fstypename); 656 657 flags = sfp->f_flags & MNT_VISFLAGMASK; 658 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 659 if (flags & o->o_opt) { 660 xo_emit("{D:, }{l:opts}", o->o_name); 661 flags &= ~o->o_opt; 662 } 663 /* 664 * Inform when file system is mounted by an unprivileged user 665 * or privileged non-root user. 666 */ 667 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 668 xo_emit("{D:, }{L:mounted by }"); 669 if ((pw = getpwuid(sfp->f_owner)) != NULL) 670 xo_emit("{:mounter/%hs}", pw->pw_name); 671 else 672 xo_emit("{:mounter/%hs}", sfp->f_owner); 673 } 674 if (verbose) { 675 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) { 676 xo_open_container("writes"); 677 xo_emit("{D:, }{Lwc:writes}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 678 (uintmax_t)sfp->f_syncwrites, 679 (uintmax_t)sfp->f_asyncwrites); 680 xo_close_container("writes"); 681 } 682 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) { 683 xo_open_container("reads"); 684 xo_emit("{D:, }{Lwc:reads}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 685 (uintmax_t)sfp->f_syncreads, 686 (uintmax_t)sfp->f_asyncreads); 687 xo_close_container("reads"); 688 } 689 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 690 fsidbuf = malloc(sizeof(sfp->f_fsid) * 2 + 1); 691 if (fsidbuf == NULL) 692 xo_errx(1, "malloc failed"); 693 for (i = 0; i < sizeof(sfp->f_fsid); i++) 694 sprintf(&fsidbuf[i * 2], "%02x", 695 ((u_char *)&sfp->f_fsid)[i]); 696 fsidbuf[i * 2] = '\0'; 697 xo_emit("{D:, }{Lw:fsid}{:fsid}", fsidbuf); 698 free(fsidbuf); 699 } 700 if (sfp->f_nvnodelistsize != 0) { 701 xo_open_container("vnodes"); 702 xo_emit("{D:, }{Lwc:vnodes}{Lw:count}{w:count/%ju}", 703 (uintmax_t)sfp->f_nvnodelistsize); 704 xo_close_container("vnodes"); 705 } 706 } 707 xo_emit("{D:)}\n"); 708 } 709 710 char * 711 catopt(char *s0, const char *s1) 712 { 713 char *cp; 714 715 if (s1 == NULL || *s1 == '\0') 716 return (s0); 717 718 if (s0 && *s0) { 719 if (asprintf(&cp, "%s,%s", s0, s1) == -1) 720 xo_errx(1, "asprintf failed"); 721 } else 722 cp = strdup(s1); 723 724 if (s0) 725 free(s0); 726 return (cp); 727 } 728 729 void 730 mangle(char *options, struct cpa *a) 731 { 732 char *p, *s, *val; 733 734 for (s = options; (p = strsep(&s, ",")) != NULL;) 735 if (*p != '\0') { 736 if (strcmp(p, "noauto") == 0) { 737 /* 738 * Do not pass noauto option to nmount(). 739 * or external mount program. noauto is 740 * only used to prevent mounting a filesystem 741 * when 'mount -a' is specified, and is 742 * not a real mount option. 743 */ 744 continue; 745 } else if (strcmp(p, "late") == 0) { 746 /* 747 * "late" is used to prevent certain file 748 * systems from being mounted before late 749 * in the boot cycle; for instance, 750 * loopback NFS mounts can't be mounted 751 * before mountd starts. 752 */ 753 continue; 754 } else if (strcmp(p, "failok") == 0) { 755 /* 756 * "failok" is used to prevent certain file 757 * systems from being causing the system to 758 * drop into single user mode in the boot 759 * cycle, and is not a real mount option. 760 */ 761 continue; 762 } else if (strncmp(p, "mountprog", 9) == 0) { 763 /* 764 * "mountprog" is used to force the use of 765 * userland mount programs. 766 */ 767 val = strchr(p, '='); 768 if (val != NULL) { 769 ++val; 770 if (*val != '\0') 771 mountprog = strdup(val); 772 } 773 774 if (mountprog == NULL) { 775 xo_errx(1, "Need value for -o mountprog"); 776 } 777 continue; 778 } else if (strcmp(p, "userquota") == 0) { 779 continue; 780 } else if (strncmp(p, userquotaeq, 781 sizeof(userquotaeq) - 1) == 0) { 782 continue; 783 } else if (strcmp(p, "groupquota") == 0) { 784 continue; 785 } else if (strncmp(p, groupquotaeq, 786 sizeof(groupquotaeq) - 1) == 0) { 787 continue; 788 } else if (*p == '-') { 789 append_arg(a, p); 790 p = strchr(p, '='); 791 if (p != NULL) { 792 *p = '\0'; 793 append_arg(a, p + 1); 794 } 795 } else { 796 append_arg(a, strdup("-o")); 797 append_arg(a, p); 798 } 799 } 800 } 801 802 803 char * 804 update_options(char *opts, char *fstab, int curflags) 805 { 806 char *o, *p; 807 char *cur; 808 char *expopt, *newopt, *tmpopt; 809 810 if (opts == NULL) 811 return (strdup("")); 812 813 /* remove meta options from list */ 814 remopt(fstab, MOUNT_META_OPTION_FSTAB); 815 remopt(fstab, MOUNT_META_OPTION_CURRENT); 816 cur = flags2opts(curflags); 817 818 /* 819 * Expand all meta-options passed to us first. 820 */ 821 expopt = NULL; 822 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 823 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 824 expopt = catopt(expopt, fstab); 825 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 826 expopt = catopt(expopt, cur); 827 else 828 expopt = catopt(expopt, o); 829 } 830 free(cur); 831 free(opts); 832 833 /* 834 * Remove previous contradictory arguments. Given option "foo" we 835 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 836 * and "foo" - so we can deal with possible options like "notice". 837 */ 838 newopt = NULL; 839 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 840 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 841 xo_errx(1, "malloc failed"); 842 843 strcpy(tmpopt, "no"); 844 strcat(tmpopt, o); 845 remopt(newopt, tmpopt); 846 free(tmpopt); 847 848 if (strncmp("no", o, 2) == 0) 849 remopt(newopt, o+2); 850 851 newopt = catopt(newopt, o); 852 } 853 free(expopt); 854 855 return (newopt); 856 } 857 858 void 859 remopt(char *string, const char *opt) 860 { 861 char *o, *p, *r; 862 863 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 864 return; 865 866 r = string; 867 868 for (p = string; (o = strsep(&p, ",")) != NULL;) { 869 if (strcmp(opt, o) != 0) { 870 if (*r == ',' && *o != '\0') 871 r++; 872 while ((*r++ = *o++) != '\0') 873 ; 874 *--r = ','; 875 } 876 } 877 *r = '\0'; 878 } 879 880 void 881 usage(void) 882 { 883 884 xo_error("%s\n%s\n%s\n", 885 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 886 " mount [-dfpruvw] special | node", 887 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 888 EXIT(EXIT_FAILURE); 889 } 890 891 void 892 putfsent(struct statfs *ent) 893 { 894 struct fstab *fst; 895 char *opts, *rw; 896 int l; 897 898 opts = NULL; 899 /* flags2opts() doesn't return the "rw" option. */ 900 if ((ent->f_flags & MNT_RDONLY) != 0) 901 rw = NULL; 902 else 903 rw = catopt(NULL, "rw"); 904 905 opts = flags2opts(ent->f_flags); 906 opts = catopt(rw, opts); 907 908 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 909 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 910 strlcpy(ent->f_mntfromname, 911 (strnstr(ent->f_mntfromname, ":", 8) +1), 912 sizeof(ent->f_mntfromname)); 913 } 914 915 l = strlen(ent->f_mntfromname); 916 xo_emit("{:device}{P:/%s}{P:/%s}{P:/%s}", 917 ent->f_mntfromname, 918 l < 8 ? "\t" : "", 919 l < 16 ? "\t" : "", 920 l < 24 ? "\t" : " "); 921 l = strlen(ent->f_mntonname); 922 xo_emit("{:mntpoint}{P:/%s}{P:/%s}{P:/%s}", 923 ent->f_mntonname, 924 l < 8 ? "\t" : "", 925 l < 16 ? "\t" : "", 926 l < 24 ? "\t" : " "); 927 xo_emit("{:fstype}{P:\t}", ent->f_fstypename); 928 l = strlen(opts); 929 xo_emit("{:opts}{P:/%s}", opts, 930 l < 8 ? "\t" : " "); 931 free(opts); 932 933 if ((fst = getfsspec(ent->f_mntfromname))) 934 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 935 fst->fs_freq, fst->fs_passno); 936 else if ((fst = getfsfile(ent->f_mntonname))) 937 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 938 fst->fs_freq, fst->fs_passno); 939 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 940 if (strcmp(ent->f_mntonname, "/") == 0) 941 xo_emit("{P:\t}{n:dump/1}{P: }{n:pass/1}\n"); 942 else 943 xo_emit("{P:\t}{n:dump/2}{P: }{n:pass/2}\n"); 944 } else 945 xo_emit("{P:\t}{n:dump/0}{P: }{n:pass/0}\n"); 946 } 947 948 949 char * 950 flags2opts(int flags) 951 { 952 char *res; 953 954 res = NULL; 955 956 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 957 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 958 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 959 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 960 if (flags & MNT_UNION) res = catopt(res, "union"); 961 if (flags & MNT_ASYNC) res = catopt(res, "async"); 962 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 963 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 964 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 965 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 966 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 967 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 968 if (flags & MNT_ACLS) res = catopt(res, "acls"); 969 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 970 if (flags & MNT_UNTRUSTED) res = catopt(res, "untrusted"); 971 if (flags & MNT_NOCOVER) res = catopt(res, "nocover"); 972 if (flags & MNT_EMPTYDIR) res = catopt(res, "emptydir"); 973 974 return (res); 975 } 976