1 /*- 2 * Copyright (c) 1980, 1989, 1993, 1994 3 * The Regents of the University of California. 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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #if 0 35 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 36 #endif 37 #endif /* not lint */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/stat.h> 45 #include <sys/wait.h> 46 47 #include <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <fstab.h> 51 #include <paths.h> 52 #include <pwd.h> 53 #include <signal.h> 54 #include <stdint.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 #include <libutil.h> 60 61 #include "extern.h" 62 #include "mntopts.h" 63 #include "pathnames.h" 64 65 /* `meta' options */ 66 #define MOUNT_META_OPTION_FSTAB "fstab" 67 #define MOUNT_META_OPTION_CURRENT "current" 68 69 static int debug, fstab_style, verbose; 70 71 struct cpa { 72 char **a; 73 ssize_t sz; 74 int c; 75 }; 76 77 char *catopt(char *, const char *); 78 struct statfs *getmntpt(const char *); 79 int hasopt(const char *, const char *); 80 int ismounted(struct fstab *, struct statfs *, int); 81 int isremountable(const char *); 82 void mangle(char *, struct cpa *); 83 char *update_options(char *, char *, int); 84 int mountfs(const char *, const char *, const char *, 85 int, const char *, const char *); 86 void remopt(char *, const char *); 87 void prmount(struct statfs *); 88 void putfsent(struct statfs *); 89 void usage(void); 90 char *flags2opts(int); 91 92 /* Map from mount options to printable formats. */ 93 static struct opt { 94 uint64_t o_opt; 95 const char *o_name; 96 } optnames[] = { 97 { MNT_ASYNC, "asynchronous" }, 98 { MNT_EXPORTED, "NFS exported" }, 99 { MNT_LOCAL, "local" }, 100 { MNT_NOATIME, "noatime" }, 101 { MNT_NOEXEC, "noexec" }, 102 { MNT_NOSUID, "nosuid" }, 103 { MNT_NOSYMFOLLOW, "nosymfollow" }, 104 { MNT_QUOTA, "with quotas" }, 105 { MNT_RDONLY, "read-only" }, 106 { MNT_SYNCHRONOUS, "synchronous" }, 107 { MNT_UNION, "union" }, 108 { MNT_NOCLUSTERR, "noclusterr" }, 109 { MNT_NOCLUSTERW, "noclusterw" }, 110 { MNT_SUIDDIR, "suiddir" }, 111 { MNT_SOFTDEP, "soft-updates" }, 112 { MNT_SUJ, "journaled soft-updates" }, 113 { MNT_MULTILABEL, "multilabel" }, 114 { MNT_ACLS, "acls" }, 115 { MNT_NFS4ACLS, "nfsv4acls" }, 116 { MNT_GJOURNAL, "gjournal" }, 117 { 0, NULL } 118 }; 119 120 /* 121 * List of VFS types that can be remounted without becoming mounted on top 122 * of each other. 123 * XXX Is this list correct? 124 */ 125 static const char * 126 remountable_fs_names[] = { 127 "ufs", "ffs", "ext2fs", 128 0 129 }; 130 131 static const char userquotaeq[] = "userquota="; 132 static const char groupquotaeq[] = "groupquota="; 133 134 static char *mountprog = NULL; 135 136 static int 137 use_mountprog(const char *vfstype) 138 { 139 /* XXX: We need to get away from implementing external mount 140 * programs for every filesystem, and move towards having 141 * each filesystem properly implement the nmount() system call. 142 */ 143 unsigned int i; 144 const char *fs[] = { 145 "cd9660", "mfs", "msdosfs", "nfs", 146 "nullfs", "oldnfs", "smbfs", "udf", "unionfs", 147 NULL 148 }; 149 150 if (mountprog != NULL) 151 return (1); 152 153 for (i = 0; fs[i] != NULL; ++i) { 154 if (strcmp(vfstype, fs[i]) == 0) 155 return (1); 156 } 157 158 return (0); 159 } 160 161 static int 162 exec_mountprog(const char *name, const char *execname, char *const argv[]) 163 { 164 pid_t pid; 165 int status; 166 167 switch (pid = fork()) { 168 case -1: /* Error. */ 169 warn("fork"); 170 exit (1); 171 case 0: /* Child. */ 172 /* Go find an executable. */ 173 execvP(execname, _PATH_SYSPATH, argv); 174 if (errno == ENOENT) { 175 warn("exec %s not found", execname); 176 if (execname[0] != '/') { 177 warnx("in path: %s", _PATH_SYSPATH); 178 } 179 } 180 exit(1); 181 default: /* Parent. */ 182 if (waitpid(pid, &status, 0) < 0) { 183 warn("waitpid"); 184 return (1); 185 } 186 187 if (WIFEXITED(status)) { 188 if (WEXITSTATUS(status) != 0) 189 return (WEXITSTATUS(status)); 190 } else if (WIFSIGNALED(status)) { 191 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 192 return (1); 193 } 194 break; 195 } 196 197 return (0); 198 } 199 200 static int 201 specified_ro(const char *arg) 202 { 203 char *optbuf, *opt; 204 int ret = 0; 205 206 optbuf = strdup(arg); 207 if (optbuf == NULL) 208 err(1, NULL); 209 210 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 211 if (strcmp(opt, "ro") == 0) { 212 ret = 1; 213 break; 214 } 215 } 216 free(optbuf); 217 return (ret); 218 } 219 220 static void 221 restart_mountd(void) 222 { 223 struct pidfh *pfh; 224 pid_t mountdpid; 225 226 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 227 if (pfh != NULL) { 228 /* Mountd is not running. */ 229 pidfile_remove(pfh); 230 return; 231 } 232 if (errno != EEXIST) { 233 /* Cannot open pidfile for some reason. */ 234 return; 235 } 236 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 237 if (kill(mountdpid, SIGHUP) == -1) 238 err(1, "signal mountd"); 239 } 240 241 int 242 main(int argc, char *argv[]) 243 { 244 const char *mntfromname, **vfslist, *vfstype; 245 struct fstab *fs; 246 struct statfs *mntbuf; 247 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro; 248 int onlylate; 249 char *cp, *ep, *options; 250 251 all = init_flags = late = onlylate = 0; 252 ro = 0; 253 options = NULL; 254 vfslist = NULL; 255 vfstype = "ufs"; 256 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1) 257 switch (ch) { 258 case 'a': 259 all = 1; 260 break; 261 case 'd': 262 debug = 1; 263 break; 264 case 'F': 265 setfstab(optarg); 266 break; 267 case 'f': 268 init_flags |= MNT_FORCE; 269 break; 270 case 'L': 271 onlylate = 1; 272 late = 1; 273 break; 274 case 'l': 275 late = 1; 276 break; 277 case 'n': 278 /* For compatibility with the Linux version of mount. */ 279 break; 280 case 'o': 281 if (*optarg) { 282 options = catopt(options, optarg); 283 if (specified_ro(optarg)) 284 ro = 1; 285 } 286 break; 287 case 'p': 288 fstab_style = 1; 289 verbose = 1; 290 break; 291 case 'r': 292 options = catopt(options, "ro"); 293 ro = 1; 294 break; 295 case 't': 296 if (vfslist != NULL) 297 errx(1, "only one -t option may be specified"); 298 vfslist = makevfslist(optarg); 299 vfstype = optarg; 300 break; 301 case 'u': 302 init_flags |= MNT_UPDATE; 303 break; 304 case 'v': 305 verbose = 1; 306 break; 307 case 'w': 308 options = catopt(options, "noro"); 309 break; 310 case '?': 311 default: 312 usage(); 313 /* NOTREACHED */ 314 } 315 argc -= optind; 316 argv += optind; 317 318 #define BADTYPE(type) \ 319 (strcmp(type, FSTAB_RO) && \ 320 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 321 322 if ((init_flags & MNT_UPDATE) && (ro == 0)) 323 options = catopt(options, "noro"); 324 325 rval = 0; 326 switch (argc) { 327 case 0: 328 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 329 err(1, "getmntinfo"); 330 if (all) { 331 while ((fs = getfsent()) != NULL) { 332 if (BADTYPE(fs->fs_type)) 333 continue; 334 if (checkvfsname(fs->fs_vfstype, vfslist)) 335 continue; 336 if (hasopt(fs->fs_mntops, "noauto")) 337 continue; 338 if (!hasopt(fs->fs_mntops, "late") && onlylate) 339 continue; 340 if (hasopt(fs->fs_mntops, "late") && !late) 341 continue; 342 if (hasopt(fs->fs_mntops, "failok")) 343 failok = 1; 344 else 345 failok = 0; 346 if (!(init_flags & MNT_UPDATE) && 347 ismounted(fs, mntbuf, mntsize)) 348 continue; 349 options = update_options(options, fs->fs_mntops, 350 mntbuf->f_flags); 351 if (mountfs(fs->fs_vfstype, fs->fs_spec, 352 fs->fs_file, init_flags, options, 353 fs->fs_mntops) && !failok) 354 rval = 1; 355 } 356 } else if (fstab_style) { 357 for (i = 0; i < mntsize; i++) { 358 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 359 continue; 360 putfsent(&mntbuf[i]); 361 } 362 } else { 363 for (i = 0; i < mntsize; i++) { 364 if (checkvfsname(mntbuf[i].f_fstypename, 365 vfslist)) 366 continue; 367 if (!verbose && 368 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 369 continue; 370 prmount(&mntbuf[i]); 371 } 372 } 373 exit(rval); 374 case 1: 375 if (vfslist != NULL) 376 usage(); 377 378 rmslashes(*argv, *argv); 379 if (init_flags & MNT_UPDATE) { 380 mntfromname = NULL; 381 have_fstab = 0; 382 if ((mntbuf = getmntpt(*argv)) == NULL) 383 errx(1, "not currently mounted %s", *argv); 384 /* 385 * Only get the mntflags from fstab if both mntpoint 386 * and mntspec are identical. Also handle the special 387 * case where just '/' is mounted and 'spec' is not 388 * identical with the one from fstab ('/dev' is missing 389 * in the spec-string at boot-time). 390 */ 391 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 392 if (strcmp(fs->fs_spec, 393 mntbuf->f_mntfromname) == 0 && 394 strcmp(fs->fs_file, 395 mntbuf->f_mntonname) == 0) { 396 have_fstab = 1; 397 mntfromname = mntbuf->f_mntfromname; 398 } else if (argv[0][0] == '/' && 399 argv[0][1] == '\0') { 400 fs = getfsfile("/"); 401 have_fstab = 1; 402 mntfromname = fs->fs_spec; 403 } 404 } 405 if (have_fstab) { 406 options = update_options(options, fs->fs_mntops, 407 mntbuf->f_flags); 408 } else { 409 mntfromname = mntbuf->f_mntfromname; 410 options = update_options(options, NULL, 411 mntbuf->f_flags); 412 } 413 rval = mountfs(mntbuf->f_fstypename, mntfromname, 414 mntbuf->f_mntonname, init_flags, options, 0); 415 break; 416 } 417 if ((fs = getfsfile(*argv)) == NULL && 418 (fs = getfsspec(*argv)) == NULL) 419 errx(1, "%s: unknown special file or file system", 420 *argv); 421 if (BADTYPE(fs->fs_type)) 422 errx(1, "%s has unknown file system type", 423 *argv); 424 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 425 init_flags, options, fs->fs_mntops); 426 break; 427 case 2: 428 /* 429 * If -t flag has not been specified, the path cannot be 430 * found, spec contains either a ':' or a '@', then assume 431 * that an NFS file system is being specified ala Sun. 432 * Check if the hostname contains only allowed characters 433 * to reduce false positives. IPv6 addresses containing 434 * ':' will be correctly parsed only if the separator is '@'. 435 * The definition of a valid hostname is taken from RFC 1034. 436 */ 437 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 438 (ep = strchr(argv[0], ':')) != NULL)) { 439 if (*ep == '@') { 440 cp = ep + 1; 441 ep = cp + strlen(cp); 442 } else 443 cp = argv[0]; 444 while (cp != ep) { 445 if (!isdigit(*cp) && !isalpha(*cp) && 446 *cp != '.' && *cp != '-' && *cp != ':') 447 break; 448 cp++; 449 } 450 if (cp == ep) 451 vfstype = "nfs"; 452 } 453 rval = mountfs(vfstype, 454 argv[0], argv[1], init_flags, options, NULL); 455 break; 456 default: 457 usage(); 458 /* NOTREACHED */ 459 } 460 461 /* 462 * If the mount was successfully, and done by root, tell mountd the 463 * good news. 464 */ 465 if (rval == 0 && getuid() == 0) 466 restart_mountd(); 467 468 exit(rval); 469 } 470 471 int 472 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 473 { 474 char realfsfile[PATH_MAX]; 475 int i; 476 477 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 478 /* the root file system can always be remounted */ 479 return (0); 480 481 /* The user may have specified a symlink in fstab, resolve the path */ 482 if (realpath(fs->fs_file, realfsfile) == NULL) { 483 /* Cannot resolve the path, use original one */ 484 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 485 } 486 487 for (i = mntsize - 1; i >= 0; --i) 488 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 489 (!isremountable(fs->fs_vfstype) || 490 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 491 return (1); 492 return (0); 493 } 494 495 int 496 isremountable(const char *vfsname) 497 { 498 const char **cp; 499 500 for (cp = remountable_fs_names; *cp; cp++) 501 if (strcmp(*cp, vfsname) == 0) 502 return (1); 503 return (0); 504 } 505 506 int 507 hasopt(const char *mntopts, const char *option) 508 { 509 int negative, found; 510 char *opt, *optbuf; 511 512 if (option[0] == 'n' && option[1] == 'o') { 513 negative = 1; 514 option += 2; 515 } else 516 negative = 0; 517 optbuf = strdup(mntopts); 518 found = 0; 519 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 520 if (opt[0] == 'n' && opt[1] == 'o') { 521 if (!strcasecmp(opt + 2, option)) 522 found = negative; 523 } else if (!strcasecmp(opt, option)) 524 found = !negative; 525 } 526 free(optbuf); 527 return (found); 528 } 529 530 static void 531 append_arg(struct cpa *sa, char *arg) 532 { 533 if (sa->c + 1 == sa->sz) { 534 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 535 sa->a = realloc(sa->a, sizeof(sa->a) * sa->sz); 536 if (sa->a == NULL) 537 errx(1, "realloc failed"); 538 } 539 sa->a[++sa->c] = arg; 540 } 541 542 int 543 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 544 const char *options, const char *mntopts) 545 { 546 struct statfs sf; 547 int i, ret; 548 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 549 static struct cpa mnt_argv; 550 551 /* resolve the mountpoint with realpath(3) */ 552 if (checkpath(name, mntpath) != 0) { 553 warn("%s", mntpath); 554 return (1); 555 } 556 name = mntpath; 557 558 if (mntopts == NULL) 559 mntopts = ""; 560 optbuf = catopt(strdup(mntopts), options); 561 562 if (strcmp(name, "/") == 0) 563 flags |= MNT_UPDATE; 564 if (flags & MNT_FORCE) 565 optbuf = catopt(optbuf, "force"); 566 if (flags & MNT_RDONLY) 567 optbuf = catopt(optbuf, "ro"); 568 /* 569 * XXX 570 * The mount_mfs (newfs) command uses -o to select the 571 * optimization mode. We don't pass the default "-o rw" 572 * for that reason. 573 */ 574 if (flags & MNT_UPDATE) 575 optbuf = catopt(optbuf, "update"); 576 577 /* Compatibility glue. */ 578 if (strcmp(vfstype, "msdos") == 0) { 579 warnx( 580 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated."); 581 vfstype = "msdosfs"; 582 } 583 584 /* Construct the name of the appropriate mount command */ 585 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 586 587 mnt_argv.c = -1; 588 append_arg(&mnt_argv, execname); 589 mangle(optbuf, &mnt_argv); 590 if (mountprog != NULL) 591 strcpy(execname, mountprog); 592 593 append_arg(&mnt_argv, strdup(spec)); 594 append_arg(&mnt_argv, strdup(name)); 595 append_arg(&mnt_argv, NULL); 596 597 if (debug) { 598 if (use_mountprog(vfstype)) 599 printf("exec: %s", execname); 600 else 601 printf("mount -t %s", vfstype); 602 for (i = 1; i < mnt_argv.c; i++) 603 (void)printf(" %s", mnt_argv.a[i]); 604 (void)printf("\n"); 605 free(optbuf); 606 free(mountprog); 607 mountprog = NULL; 608 return (0); 609 } 610 611 if (use_mountprog(vfstype)) { 612 ret = exec_mountprog(name, execname, mnt_argv.a); 613 } else { 614 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 615 } 616 617 free(optbuf); 618 free(mountprog); 619 mountprog = NULL; 620 621 if (verbose) { 622 if (statfs(name, &sf) < 0) { 623 warn("statfs %s", name); 624 return (1); 625 } 626 if (fstab_style) 627 putfsent(&sf); 628 else 629 prmount(&sf); 630 } 631 632 return (ret); 633 } 634 635 void 636 prmount(struct statfs *sfp) 637 { 638 uint64_t flags; 639 unsigned int i; 640 struct opt *o; 641 struct passwd *pw; 642 643 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 644 sfp->f_fstypename); 645 646 flags = sfp->f_flags & MNT_VISFLAGMASK; 647 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 648 if (flags & o->o_opt) { 649 (void)printf(", %s", o->o_name); 650 flags &= ~o->o_opt; 651 } 652 /* 653 * Inform when file system is mounted by an unprivileged user 654 * or privileged non-root user. 655 */ 656 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 657 (void)printf(", mounted by "); 658 if ((pw = getpwuid(sfp->f_owner)) != NULL) 659 (void)printf("%s", pw->pw_name); 660 else 661 (void)printf("%d", sfp->f_owner); 662 } 663 if (verbose) { 664 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 665 (void)printf(", writes: sync %ju async %ju", 666 (uintmax_t)sfp->f_syncwrites, 667 (uintmax_t)sfp->f_asyncwrites); 668 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 669 (void)printf(", reads: sync %ju async %ju", 670 (uintmax_t)sfp->f_syncreads, 671 (uintmax_t)sfp->f_asyncreads); 672 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 673 printf(", fsid "); 674 for (i = 0; i < sizeof(sfp->f_fsid); i++) 675 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 676 } 677 } 678 (void)printf(")\n"); 679 } 680 681 struct statfs * 682 getmntpt(const char *name) 683 { 684 struct statfs *mntbuf; 685 int i, mntsize; 686 687 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 688 for (i = mntsize - 1; i >= 0; i--) { 689 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 690 strcmp(mntbuf[i].f_mntonname, name) == 0) 691 return (&mntbuf[i]); 692 } 693 return (NULL); 694 } 695 696 char * 697 catopt(char *s0, const char *s1) 698 { 699 size_t i; 700 char *cp; 701 702 if (s1 == NULL || *s1 == '\0') 703 return (s0); 704 705 if (s0 && *s0) { 706 i = strlen(s0) + strlen(s1) + 1 + 1; 707 if ((cp = malloc(i)) == NULL) 708 errx(1, "malloc failed"); 709 (void)snprintf(cp, i, "%s,%s", s0, s1); 710 } else 711 cp = strdup(s1); 712 713 if (s0) 714 free(s0); 715 return (cp); 716 } 717 718 void 719 mangle(char *options, struct cpa *a) 720 { 721 char *p, *s, *val; 722 723 for (s = options; (p = strsep(&s, ",")) != NULL;) 724 if (*p != '\0') { 725 if (strcmp(p, "noauto") == 0) { 726 /* 727 * Do not pass noauto option to nmount(). 728 * or external mount program. noauto is 729 * only used to prevent mounting a filesystem 730 * when 'mount -a' is specified, and is 731 * not a real mount option. 732 */ 733 continue; 734 } else if (strcmp(p, "late") == 0) { 735 /* 736 * "late" is used to prevent certain file 737 * systems from being mounted before late 738 * in the boot cycle; for instance, 739 * loopback NFS mounts can't be mounted 740 * before mountd starts. 741 */ 742 continue; 743 } else if (strcmp(p, "failok") == 0) { 744 /* 745 * "failok" is used to prevent certain file 746 * systems from being causing the system to 747 * drop into single user mode in the boot 748 * cycle, and is not a real mount option. 749 */ 750 continue; 751 } else if (strncmp(p, "mountprog", 9) == 0) { 752 /* 753 * "mountprog" is used to force the use of 754 * userland mount programs. 755 */ 756 val = strchr(p, '='); 757 if (val != NULL) { 758 ++val; 759 if (*val != '\0') 760 mountprog = strdup(val); 761 } 762 763 if (mountprog == NULL) { 764 errx(1, "Need value for -o mountprog"); 765 } 766 continue; 767 } else if (strcmp(p, "userquota") == 0) { 768 continue; 769 } else if (strncmp(p, userquotaeq, 770 sizeof(userquotaeq) - 1) == 0) { 771 continue; 772 } else if (strcmp(p, "groupquota") == 0) { 773 continue; 774 } else if (strncmp(p, groupquotaeq, 775 sizeof(groupquotaeq) - 1) == 0) { 776 continue; 777 } else if (*p == '-') { 778 append_arg(a, p); 779 p = strchr(p, '='); 780 if (p != NULL) { 781 *p = '\0'; 782 append_arg(a, p + 1); 783 } 784 } else { 785 append_arg(a, strdup("-o")); 786 append_arg(a, p); 787 } 788 } 789 } 790 791 792 char * 793 update_options(char *opts, char *fstab, int curflags) 794 { 795 char *o, *p; 796 char *cur; 797 char *expopt, *newopt, *tmpopt; 798 799 if (opts == NULL) 800 return (strdup("")); 801 802 /* remove meta options from list */ 803 remopt(fstab, MOUNT_META_OPTION_FSTAB); 804 remopt(fstab, MOUNT_META_OPTION_CURRENT); 805 cur = flags2opts(curflags); 806 807 /* 808 * Expand all meta-options passed to us first. 809 */ 810 expopt = NULL; 811 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 812 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 813 expopt = catopt(expopt, fstab); 814 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 815 expopt = catopt(expopt, cur); 816 else 817 expopt = catopt(expopt, o); 818 } 819 free(cur); 820 free(opts); 821 822 /* 823 * Remove previous contradictory arguments. Given option "foo" we 824 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 825 * and "foo" - so we can deal with possible options like "notice". 826 */ 827 newopt = NULL; 828 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 829 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 830 errx(1, "malloc failed"); 831 832 strcpy(tmpopt, "no"); 833 strcat(tmpopt, o); 834 remopt(newopt, tmpopt); 835 free(tmpopt); 836 837 if (strncmp("no", o, 2) == 0) 838 remopt(newopt, o+2); 839 840 newopt = catopt(newopt, o); 841 } 842 free(expopt); 843 844 return (newopt); 845 } 846 847 void 848 remopt(char *string, const char *opt) 849 { 850 char *o, *p, *r; 851 852 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 853 return; 854 855 r = string; 856 857 for (p = string; (o = strsep(&p, ",")) != NULL;) { 858 if (strcmp(opt, o) != 0) { 859 if (*r == ',' && *o != '\0') 860 r++; 861 while ((*r++ = *o++) != '\0') 862 ; 863 *--r = ','; 864 } 865 } 866 *r = '\0'; 867 } 868 869 void 870 usage(void) 871 { 872 873 (void)fprintf(stderr, "%s\n%s\n%s\n", 874 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 875 " mount [-dfpruvw] special | node", 876 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 877 exit(1); 878 } 879 880 void 881 putfsent(struct statfs *ent) 882 { 883 struct fstab *fst; 884 char *opts, *rw; 885 int l; 886 887 opts = NULL; 888 /* flags2opts() doesn't return the "rw" option. */ 889 if ((ent->f_flags & MNT_RDONLY) != 0) 890 rw = NULL; 891 else 892 rw = catopt(NULL, "rw"); 893 894 opts = flags2opts(ent->f_flags); 895 opts = catopt(rw, opts); 896 897 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 898 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 899 strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8) 900 +1)); 901 } 902 903 l = strlen(ent->f_mntfromname); 904 printf("%s%s%s%s", ent->f_mntfromname, 905 l < 8 ? "\t" : "", 906 l < 16 ? "\t" : "", 907 l < 24 ? "\t" : " "); 908 l = strlen(ent->f_mntonname); 909 printf("%s%s%s%s", ent->f_mntonname, 910 l < 8 ? "\t" : "", 911 l < 16 ? "\t" : "", 912 l < 24 ? "\t" : " "); 913 printf("%s\t", ent->f_fstypename); 914 l = strlen(opts); 915 printf("%s%s", opts, 916 l < 8 ? "\t" : " "); 917 free(opts); 918 919 if ((fst = getfsspec(ent->f_mntfromname))) 920 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 921 else if ((fst = getfsfile(ent->f_mntonname))) 922 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 923 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 924 if (strcmp(ent->f_mntonname, "/") == 0) 925 printf("\t1 1\n"); 926 else 927 printf("\t2 2\n"); 928 } else 929 printf("\t0 0\n"); 930 } 931 932 933 char * 934 flags2opts(int flags) 935 { 936 char *res; 937 938 res = NULL; 939 940 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 941 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 942 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 943 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 944 if (flags & MNT_UNION) res = catopt(res, "union"); 945 if (flags & MNT_ASYNC) res = catopt(res, "async"); 946 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 947 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 948 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 949 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 950 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 951 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 952 if (flags & MNT_ACLS) res = catopt(res, "acls"); 953 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 954 955 return (res); 956 } 957