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:fLlo: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 'o': 278 if (*optarg) { 279 options = catopt(options, optarg); 280 if (specified_ro(optarg)) 281 ro = 1; 282 } 283 break; 284 case 'p': 285 fstab_style = 1; 286 verbose = 1; 287 break; 288 case 'r': 289 options = catopt(options, "ro"); 290 ro = 1; 291 break; 292 case 't': 293 if (vfslist != NULL) 294 errx(1, "only one -t option may be specified"); 295 vfslist = makevfslist(optarg); 296 vfstype = optarg; 297 break; 298 case 'u': 299 init_flags |= MNT_UPDATE; 300 break; 301 case 'v': 302 verbose = 1; 303 break; 304 case 'w': 305 options = catopt(options, "noro"); 306 break; 307 case '?': 308 default: 309 usage(); 310 /* NOTREACHED */ 311 } 312 argc -= optind; 313 argv += optind; 314 315 #define BADTYPE(type) \ 316 (strcmp(type, FSTAB_RO) && \ 317 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 318 319 if ((init_flags & MNT_UPDATE) && (ro == 0)) 320 options = catopt(options, "noro"); 321 322 rval = 0; 323 switch (argc) { 324 case 0: 325 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 326 err(1, "getmntinfo"); 327 if (all) { 328 while ((fs = getfsent()) != NULL) { 329 if (BADTYPE(fs->fs_type)) 330 continue; 331 if (checkvfsname(fs->fs_vfstype, vfslist)) 332 continue; 333 if (hasopt(fs->fs_mntops, "noauto")) 334 continue; 335 if (!hasopt(fs->fs_mntops, "late") && onlylate) 336 continue; 337 if (hasopt(fs->fs_mntops, "late") && !late) 338 continue; 339 if (hasopt(fs->fs_mntops, "failok")) 340 failok = 1; 341 else 342 failok = 0; 343 if (!(init_flags & MNT_UPDATE) && 344 ismounted(fs, mntbuf, mntsize)) 345 continue; 346 options = update_options(options, fs->fs_mntops, 347 mntbuf->f_flags); 348 if (mountfs(fs->fs_vfstype, fs->fs_spec, 349 fs->fs_file, init_flags, options, 350 fs->fs_mntops) && !failok) 351 rval = 1; 352 } 353 } else if (fstab_style) { 354 for (i = 0; i < mntsize; i++) { 355 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 356 continue; 357 putfsent(&mntbuf[i]); 358 } 359 } else { 360 for (i = 0; i < mntsize; i++) { 361 if (checkvfsname(mntbuf[i].f_fstypename, 362 vfslist)) 363 continue; 364 if (!verbose && 365 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 366 continue; 367 prmount(&mntbuf[i]); 368 } 369 } 370 exit(rval); 371 case 1: 372 if (vfslist != NULL) 373 usage(); 374 375 rmslashes(*argv, *argv); 376 if (init_flags & MNT_UPDATE) { 377 mntfromname = NULL; 378 have_fstab = 0; 379 if ((mntbuf = getmntpt(*argv)) == NULL) 380 errx(1, "not currently mounted %s", *argv); 381 /* 382 * Only get the mntflags from fstab if both mntpoint 383 * and mntspec are identical. Also handle the special 384 * case where just '/' is mounted and 'spec' is not 385 * identical with the one from fstab ('/dev' is missing 386 * in the spec-string at boot-time). 387 */ 388 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 389 if (strcmp(fs->fs_spec, 390 mntbuf->f_mntfromname) == 0 && 391 strcmp(fs->fs_file, 392 mntbuf->f_mntonname) == 0) { 393 have_fstab = 1; 394 mntfromname = mntbuf->f_mntfromname; 395 } else if (argv[0][0] == '/' && 396 argv[0][1] == '\0') { 397 fs = getfsfile("/"); 398 have_fstab = 1; 399 mntfromname = fs->fs_spec; 400 } 401 } 402 if (have_fstab) { 403 options = update_options(options, fs->fs_mntops, 404 mntbuf->f_flags); 405 } else { 406 mntfromname = mntbuf->f_mntfromname; 407 options = update_options(options, NULL, 408 mntbuf->f_flags); 409 } 410 rval = mountfs(mntbuf->f_fstypename, mntfromname, 411 mntbuf->f_mntonname, init_flags, options, 0); 412 break; 413 } 414 if ((fs = getfsfile(*argv)) == NULL && 415 (fs = getfsspec(*argv)) == NULL) 416 errx(1, "%s: unknown special file or file system", 417 *argv); 418 if (BADTYPE(fs->fs_type)) 419 errx(1, "%s has unknown file system type", 420 *argv); 421 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 422 init_flags, options, fs->fs_mntops); 423 break; 424 case 2: 425 /* 426 * If -t flag has not been specified, the path cannot be 427 * found, spec contains either a ':' or a '@', then assume 428 * that an NFS file system is being specified ala Sun. 429 * Check if the hostname contains only allowed characters 430 * to reduce false positives. IPv6 addresses containing 431 * ':' will be correctly parsed only if the separator is '@'. 432 * The definition of a valid hostname is taken from RFC 1034. 433 */ 434 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 435 (ep = strchr(argv[0], ':')) != NULL)) { 436 if (*ep == '@') { 437 cp = ep + 1; 438 ep = cp + strlen(cp); 439 } else 440 cp = argv[0]; 441 while (cp != ep) { 442 if (!isdigit(*cp) && !isalpha(*cp) && 443 *cp != '.' && *cp != '-' && *cp != ':') 444 break; 445 cp++; 446 } 447 if (cp == ep) 448 vfstype = "nfs"; 449 } 450 rval = mountfs(vfstype, 451 argv[0], argv[1], init_flags, options, NULL); 452 break; 453 default: 454 usage(); 455 /* NOTREACHED */ 456 } 457 458 /* 459 * If the mount was successfully, and done by root, tell mountd the 460 * good news. 461 */ 462 if (rval == 0 && getuid() == 0) 463 restart_mountd(); 464 465 exit(rval); 466 } 467 468 int 469 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 470 { 471 char realfsfile[PATH_MAX]; 472 int i; 473 474 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 475 /* the root file system can always be remounted */ 476 return (0); 477 478 /* The user may have specified a symlink in fstab, resolve the path */ 479 if (realpath(fs->fs_file, realfsfile) == NULL) { 480 /* Cannot resolve the path, use original one */ 481 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 482 } 483 484 for (i = mntsize - 1; i >= 0; --i) 485 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 486 (!isremountable(fs->fs_vfstype) || 487 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 488 return (1); 489 return (0); 490 } 491 492 int 493 isremountable(const char *vfsname) 494 { 495 const char **cp; 496 497 for (cp = remountable_fs_names; *cp; cp++) 498 if (strcmp(*cp, vfsname) == 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 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 (checkpath(name, mntpath) != 0) { 550 warn("%s", mntpath); 551 return (1); 552 } 553 name = mntpath; 554 555 if (mntopts == NULL) 556 mntopts = ""; 557 optbuf = catopt(strdup(mntopts), options); 558 559 if (strcmp(name, "/") == 0) 560 flags |= MNT_UPDATE; 561 if (flags & MNT_FORCE) 562 optbuf = catopt(optbuf, "force"); 563 if (flags & MNT_RDONLY) 564 optbuf = catopt(optbuf, "ro"); 565 /* 566 * XXX 567 * The mount_mfs (newfs) command uses -o to select the 568 * optimization mode. We don't pass the default "-o rw" 569 * for that reason. 570 */ 571 if (flags & MNT_UPDATE) 572 optbuf = catopt(optbuf, "update"); 573 574 /* Compatibility glue. */ 575 if (strcmp(vfstype, "msdos") == 0) { 576 warnx( 577 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated."); 578 vfstype = "msdosfs"; 579 } 580 581 /* Construct the name of the appropriate mount command */ 582 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 583 584 mnt_argv.c = -1; 585 append_arg(&mnt_argv, execname); 586 mangle(optbuf, &mnt_argv); 587 if (mountprog != NULL) 588 strcpy(execname, mountprog); 589 590 append_arg(&mnt_argv, strdup(spec)); 591 append_arg(&mnt_argv, strdup(name)); 592 append_arg(&mnt_argv, NULL); 593 594 if (debug) { 595 if (use_mountprog(vfstype)) 596 printf("exec: %s", execname); 597 else 598 printf("mount -t %s", vfstype); 599 for (i = 1; i < mnt_argv.c; i++) 600 (void)printf(" %s", mnt_argv.a[i]); 601 (void)printf("\n"); 602 free(optbuf); 603 free(mountprog); 604 mountprog = NULL; 605 return (0); 606 } 607 608 if (use_mountprog(vfstype)) { 609 ret = exec_mountprog(name, execname, mnt_argv.a); 610 } else { 611 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 612 } 613 614 free(optbuf); 615 free(mountprog); 616 mountprog = NULL; 617 618 if (verbose) { 619 if (statfs(name, &sf) < 0) { 620 warn("statfs %s", name); 621 return (1); 622 } 623 if (fstab_style) 624 putfsent(&sf); 625 else 626 prmount(&sf); 627 } 628 629 return (ret); 630 } 631 632 void 633 prmount(struct statfs *sfp) 634 { 635 uint64_t flags; 636 unsigned int i; 637 struct opt *o; 638 struct passwd *pw; 639 640 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 641 sfp->f_fstypename); 642 643 flags = sfp->f_flags & MNT_VISFLAGMASK; 644 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 645 if (flags & o->o_opt) { 646 (void)printf(", %s", o->o_name); 647 flags &= ~o->o_opt; 648 } 649 /* 650 * Inform when file system is mounted by an unprivileged user 651 * or privileged non-root user. 652 */ 653 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 654 (void)printf(", mounted by "); 655 if ((pw = getpwuid(sfp->f_owner)) != NULL) 656 (void)printf("%s", pw->pw_name); 657 else 658 (void)printf("%d", sfp->f_owner); 659 } 660 if (verbose) { 661 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 662 (void)printf(", writes: sync %ju async %ju", 663 (uintmax_t)sfp->f_syncwrites, 664 (uintmax_t)sfp->f_asyncwrites); 665 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 666 (void)printf(", reads: sync %ju async %ju", 667 (uintmax_t)sfp->f_syncreads, 668 (uintmax_t)sfp->f_asyncreads); 669 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 670 printf(", fsid "); 671 for (i = 0; i < sizeof(sfp->f_fsid); i++) 672 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 673 } 674 } 675 (void)printf(")\n"); 676 } 677 678 struct statfs * 679 getmntpt(const char *name) 680 { 681 struct statfs *mntbuf; 682 int i, mntsize; 683 684 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 685 for (i = mntsize - 1; i >= 0; i--) { 686 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 687 strcmp(mntbuf[i].f_mntonname, name) == 0) 688 return (&mntbuf[i]); 689 } 690 return (NULL); 691 } 692 693 char * 694 catopt(char *s0, const char *s1) 695 { 696 size_t i; 697 char *cp; 698 699 if (s1 == NULL || *s1 == '\0') 700 return (s0); 701 702 if (s0 && *s0) { 703 i = strlen(s0) + strlen(s1) + 1 + 1; 704 if ((cp = malloc(i)) == NULL) 705 errx(1, "malloc failed"); 706 (void)snprintf(cp, i, "%s,%s", s0, s1); 707 } else 708 cp = strdup(s1); 709 710 if (s0) 711 free(s0); 712 return (cp); 713 } 714 715 void 716 mangle(char *options, struct cpa *a) 717 { 718 char *p, *s, *val; 719 720 for (s = options; (p = strsep(&s, ",")) != NULL;) 721 if (*p != '\0') { 722 if (strcmp(p, "noauto") == 0) { 723 /* 724 * Do not pass noauto option to nmount(). 725 * or external mount program. noauto is 726 * only used to prevent mounting a filesystem 727 * when 'mount -a' is specified, and is 728 * not a real mount option. 729 */ 730 continue; 731 } else if (strcmp(p, "late") == 0) { 732 /* 733 * "late" is used to prevent certain file 734 * systems from being mounted before late 735 * in the boot cycle; for instance, 736 * loopback NFS mounts can't be mounted 737 * before mountd starts. 738 */ 739 continue; 740 } else if (strcmp(p, "failok") == 0) { 741 /* 742 * "failok" is used to prevent certain file 743 * systems from being causing the system to 744 * drop into single user mode in the boot 745 * cycle, and is not a real mount option. 746 */ 747 continue; 748 } else if (strncmp(p, "mountprog", 9) == 0) { 749 /* 750 * "mountprog" is used to force the use of 751 * userland mount programs. 752 */ 753 val = strchr(p, '='); 754 if (val != NULL) { 755 ++val; 756 if (*val != '\0') 757 mountprog = strdup(val); 758 } 759 760 if (mountprog == NULL) { 761 errx(1, "Need value for -o mountprog"); 762 } 763 continue; 764 } else if (strcmp(p, "userquota") == 0) { 765 continue; 766 } else if (strncmp(p, userquotaeq, 767 sizeof(userquotaeq) - 1) == 0) { 768 continue; 769 } else if (strcmp(p, "groupquota") == 0) { 770 continue; 771 } else if (strncmp(p, groupquotaeq, 772 sizeof(groupquotaeq) - 1) == 0) { 773 continue; 774 } else if (*p == '-') { 775 append_arg(a, p); 776 p = strchr(p, '='); 777 if (p != NULL) { 778 *p = '\0'; 779 append_arg(a, p + 1); 780 } 781 } else { 782 append_arg(a, strdup("-o")); 783 append_arg(a, p); 784 } 785 } 786 } 787 788 789 char * 790 update_options(char *opts, char *fstab, int curflags) 791 { 792 char *o, *p; 793 char *cur; 794 char *expopt, *newopt, *tmpopt; 795 796 if (opts == NULL) 797 return (strdup("")); 798 799 /* remove meta options from list */ 800 remopt(fstab, MOUNT_META_OPTION_FSTAB); 801 remopt(fstab, MOUNT_META_OPTION_CURRENT); 802 cur = flags2opts(curflags); 803 804 /* 805 * Expand all meta-options passed to us first. 806 */ 807 expopt = NULL; 808 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 809 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 810 expopt = catopt(expopt, fstab); 811 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 812 expopt = catopt(expopt, cur); 813 else 814 expopt = catopt(expopt, o); 815 } 816 free(cur); 817 free(opts); 818 819 /* 820 * Remove previous contradictory arguments. Given option "foo" we 821 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 822 * and "foo" - so we can deal with possible options like "notice". 823 */ 824 newopt = NULL; 825 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 826 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 827 errx(1, "malloc failed"); 828 829 strcpy(tmpopt, "no"); 830 strcat(tmpopt, o); 831 remopt(newopt, tmpopt); 832 free(tmpopt); 833 834 if (strncmp("no", o, 2) == 0) 835 remopt(newopt, o+2); 836 837 newopt = catopt(newopt, o); 838 } 839 free(expopt); 840 841 return (newopt); 842 } 843 844 void 845 remopt(char *string, const char *opt) 846 { 847 char *o, *p, *r; 848 849 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 850 return; 851 852 r = string; 853 854 for (p = string; (o = strsep(&p, ",")) != NULL;) { 855 if (strcmp(opt, o) != 0) { 856 if (*r == ',' && *o != '\0') 857 r++; 858 while ((*r++ = *o++) != '\0') 859 ; 860 *--r = ','; 861 } 862 } 863 *r = '\0'; 864 } 865 866 void 867 usage(void) 868 { 869 870 (void)fprintf(stderr, "%s\n%s\n%s\n", 871 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 872 " mount [-dfpruvw] special | node", 873 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 874 exit(1); 875 } 876 877 void 878 putfsent(struct statfs *ent) 879 { 880 struct fstab *fst; 881 char *opts, *rw; 882 int l; 883 884 opts = NULL; 885 /* flags2opts() doesn't return the "rw" option. */ 886 if ((ent->f_flags & MNT_RDONLY) != 0) 887 rw = NULL; 888 else 889 rw = catopt(NULL, "rw"); 890 891 opts = flags2opts(ent->f_flags); 892 opts = catopt(rw, opts); 893 894 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 895 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 896 strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8) 897 +1)); 898 } 899 900 l = strlen(ent->f_mntfromname); 901 printf("%s%s%s%s", ent->f_mntfromname, 902 l < 8 ? "\t" : "", 903 l < 16 ? "\t" : "", 904 l < 24 ? "\t" : " "); 905 l = strlen(ent->f_mntonname); 906 printf("%s%s%s%s", ent->f_mntonname, 907 l < 8 ? "\t" : "", 908 l < 16 ? "\t" : "", 909 l < 24 ? "\t" : " "); 910 printf("%s\t", ent->f_fstypename); 911 l = strlen(opts); 912 printf("%s%s", opts, 913 l < 8 ? "\t" : " "); 914 free(opts); 915 916 if ((fst = getfsspec(ent->f_mntfromname))) 917 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 918 else if ((fst = getfsfile(ent->f_mntonname))) 919 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 920 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 921 if (strcmp(ent->f_mntonname, "/") == 0) 922 printf("\t1 1\n"); 923 else 924 printf("\t2 2\n"); 925 } else 926 printf("\t0 0\n"); 927 } 928 929 930 char * 931 flags2opts(int flags) 932 { 933 char *res; 934 935 res = NULL; 936 937 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 938 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 939 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 940 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 941 if (flags & MNT_UNION) res = catopt(res, "union"); 942 if (flags & MNT_ASYNC) res = catopt(res, "async"); 943 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 944 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 945 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 946 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 947 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 948 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 949 if (flags & MNT_ACLS) res = catopt(res, "acls"); 950 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 951 952 return (res); 953 } 954