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 { MNT_AUTOMOUNTED, "automounted" }, 118 { 0, NULL } 119 }; 120 121 /* 122 * List of VFS types that can be remounted without becoming mounted on top 123 * of each other. 124 * XXX Is this list correct? 125 */ 126 static const char * 127 remountable_fs_names[] = { 128 "ufs", "ffs", "ext2fs", 129 0 130 }; 131 132 static const char userquotaeq[] = "userquota="; 133 static const char groupquotaeq[] = "groupquota="; 134 135 static char *mountprog = NULL; 136 137 static int 138 use_mountprog(const char *vfstype) 139 { 140 /* XXX: We need to get away from implementing external mount 141 * programs for every filesystem, and move towards having 142 * each filesystem properly implement the nmount() system call. 143 */ 144 unsigned int i; 145 const char *fs[] = { 146 "cd9660", "mfs", "msdosfs", "nfs", 147 "nullfs", "oldnfs", "smbfs", "udf", "unionfs", 148 NULL 149 }; 150 151 if (mountprog != NULL) 152 return (1); 153 154 for (i = 0; fs[i] != NULL; ++i) { 155 if (strcmp(vfstype, fs[i]) == 0) 156 return (1); 157 } 158 159 return (0); 160 } 161 162 static int 163 exec_mountprog(const char *name, const char *execname, char *const argv[]) 164 { 165 pid_t pid; 166 int status; 167 168 switch (pid = fork()) { 169 case -1: /* Error. */ 170 warn("fork"); 171 exit (1); 172 case 0: /* Child. */ 173 /* Go find an executable. */ 174 execvP(execname, _PATH_SYSPATH, argv); 175 if (errno == ENOENT) { 176 warn("exec %s not found", execname); 177 if (execname[0] != '/') { 178 warnx("in path: %s", _PATH_SYSPATH); 179 } 180 } 181 exit(1); 182 default: /* Parent. */ 183 if (waitpid(pid, &status, 0) < 0) { 184 warn("waitpid"); 185 return (1); 186 } 187 188 if (WIFEXITED(status)) { 189 if (WEXITSTATUS(status) != 0) 190 return (WEXITSTATUS(status)); 191 } else if (WIFSIGNALED(status)) { 192 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 193 return (1); 194 } 195 break; 196 } 197 198 return (0); 199 } 200 201 static int 202 specified_ro(const char *arg) 203 { 204 char *optbuf, *opt; 205 int ret = 0; 206 207 optbuf = strdup(arg); 208 if (optbuf == NULL) 209 err(1, NULL); 210 211 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 212 if (strcmp(opt, "ro") == 0) { 213 ret = 1; 214 break; 215 } 216 } 217 free(optbuf); 218 return (ret); 219 } 220 221 static void 222 restart_mountd(void) 223 { 224 struct pidfh *pfh; 225 pid_t mountdpid; 226 227 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 228 if (pfh != NULL) { 229 /* Mountd is not running. */ 230 pidfile_remove(pfh); 231 return; 232 } 233 if (errno != EEXIST) { 234 /* Cannot open pidfile for some reason. */ 235 return; 236 } 237 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 238 if (kill(mountdpid, SIGHUP) == -1) 239 err(1, "signal mountd"); 240 } 241 242 int 243 main(int argc, char *argv[]) 244 { 245 const char *mntfromname, **vfslist, *vfstype; 246 struct fstab *fs; 247 struct statfs *mntbuf; 248 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro; 249 int onlylate; 250 char *cp, *ep, *options; 251 252 all = init_flags = late = onlylate = 0; 253 ro = 0; 254 options = NULL; 255 vfslist = NULL; 256 vfstype = "ufs"; 257 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1) 258 switch (ch) { 259 case 'a': 260 all = 1; 261 break; 262 case 'd': 263 debug = 1; 264 break; 265 case 'F': 266 setfstab(optarg); 267 break; 268 case 'f': 269 init_flags |= MNT_FORCE; 270 break; 271 case 'L': 272 onlylate = 1; 273 late = 1; 274 break; 275 case 'l': 276 late = 1; 277 break; 278 case 'n': 279 /* For compatibility with the Linux version of mount. */ 280 break; 281 case 'o': 282 if (*optarg) { 283 options = catopt(options, optarg); 284 if (specified_ro(optarg)) 285 ro = 1; 286 } 287 break; 288 case 'p': 289 fstab_style = 1; 290 verbose = 1; 291 break; 292 case 'r': 293 options = catopt(options, "ro"); 294 ro = 1; 295 break; 296 case 't': 297 if (vfslist != NULL) 298 errx(1, "only one -t option may be specified"); 299 vfslist = makevfslist(optarg); 300 vfstype = optarg; 301 break; 302 case 'u': 303 init_flags |= MNT_UPDATE; 304 break; 305 case 'v': 306 verbose = 1; 307 break; 308 case 'w': 309 options = catopt(options, "noro"); 310 break; 311 case '?': 312 default: 313 usage(); 314 /* NOTREACHED */ 315 } 316 argc -= optind; 317 argv += optind; 318 319 #define BADTYPE(type) \ 320 (strcmp(type, FSTAB_RO) && \ 321 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 322 323 if ((init_flags & MNT_UPDATE) && (ro == 0)) 324 options = catopt(options, "noro"); 325 326 rval = 0; 327 switch (argc) { 328 case 0: 329 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 330 err(1, "getmntinfo"); 331 if (all) { 332 while ((fs = getfsent()) != NULL) { 333 if (BADTYPE(fs->fs_type)) 334 continue; 335 if (checkvfsname(fs->fs_vfstype, vfslist)) 336 continue; 337 if (hasopt(fs->fs_mntops, "noauto")) 338 continue; 339 if (!hasopt(fs->fs_mntops, "late") && onlylate) 340 continue; 341 if (hasopt(fs->fs_mntops, "late") && !late) 342 continue; 343 if (hasopt(fs->fs_mntops, "failok")) 344 failok = 1; 345 else 346 failok = 0; 347 if (!(init_flags & MNT_UPDATE) && 348 ismounted(fs, mntbuf, mntsize)) 349 continue; 350 options = update_options(options, fs->fs_mntops, 351 mntbuf->f_flags); 352 if (mountfs(fs->fs_vfstype, fs->fs_spec, 353 fs->fs_file, init_flags, options, 354 fs->fs_mntops) && !failok) 355 rval = 1; 356 } 357 } else if (fstab_style) { 358 for (i = 0; i < mntsize; i++) { 359 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 360 continue; 361 putfsent(&mntbuf[i]); 362 } 363 } else { 364 for (i = 0; i < mntsize; i++) { 365 if (checkvfsname(mntbuf[i].f_fstypename, 366 vfslist)) 367 continue; 368 if (!verbose && 369 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 370 continue; 371 prmount(&mntbuf[i]); 372 } 373 } 374 exit(rval); 375 case 1: 376 if (vfslist != NULL) 377 usage(); 378 379 rmslashes(*argv, *argv); 380 if (init_flags & MNT_UPDATE) { 381 mntfromname = NULL; 382 have_fstab = 0; 383 if ((mntbuf = getmntpt(*argv)) == NULL) 384 errx(1, "not currently mounted %s", *argv); 385 /* 386 * Only get the mntflags from fstab if both mntpoint 387 * and mntspec are identical. Also handle the special 388 * case where just '/' is mounted and 'spec' is not 389 * identical with the one from fstab ('/dev' is missing 390 * in the spec-string at boot-time). 391 */ 392 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 393 if (strcmp(fs->fs_spec, 394 mntbuf->f_mntfromname) == 0 && 395 strcmp(fs->fs_file, 396 mntbuf->f_mntonname) == 0) { 397 have_fstab = 1; 398 mntfromname = mntbuf->f_mntfromname; 399 } else if (argv[0][0] == '/' && 400 argv[0][1] == '\0') { 401 fs = getfsfile("/"); 402 have_fstab = 1; 403 mntfromname = fs->fs_spec; 404 } 405 } 406 if (have_fstab) { 407 options = update_options(options, fs->fs_mntops, 408 mntbuf->f_flags); 409 } else { 410 mntfromname = mntbuf->f_mntfromname; 411 options = update_options(options, NULL, 412 mntbuf->f_flags); 413 } 414 rval = mountfs(mntbuf->f_fstypename, mntfromname, 415 mntbuf->f_mntonname, init_flags, options, 0); 416 break; 417 } 418 if ((fs = getfsfile(*argv)) == NULL && 419 (fs = getfsspec(*argv)) == NULL) 420 errx(1, "%s: unknown special file or file system", 421 *argv); 422 if (BADTYPE(fs->fs_type)) 423 errx(1, "%s has unknown file system type", 424 *argv); 425 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 426 init_flags, options, fs->fs_mntops); 427 break; 428 case 2: 429 /* 430 * If -t flag has not been specified, the path cannot be 431 * found, spec contains either a ':' or a '@', then assume 432 * that an NFS file system is being specified ala Sun. 433 * Check if the hostname contains only allowed characters 434 * to reduce false positives. IPv6 addresses containing 435 * ':' will be correctly parsed only if the separator is '@'. 436 * The definition of a valid hostname is taken from RFC 1034. 437 */ 438 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 439 (ep = strchr(argv[0], ':')) != NULL)) { 440 if (*ep == '@') { 441 cp = ep + 1; 442 ep = cp + strlen(cp); 443 } else 444 cp = argv[0]; 445 while (cp != ep) { 446 if (!isdigit(*cp) && !isalpha(*cp) && 447 *cp != '.' && *cp != '-' && *cp != ':') 448 break; 449 cp++; 450 } 451 if (cp == ep) 452 vfstype = "nfs"; 453 } 454 rval = mountfs(vfstype, 455 argv[0], argv[1], init_flags, options, NULL); 456 break; 457 default: 458 usage(); 459 /* NOTREACHED */ 460 } 461 462 /* 463 * If the mount was successfully, and done by root, tell mountd the 464 * good news. 465 */ 466 if (rval == 0 && getuid() == 0) 467 restart_mountd(); 468 469 exit(rval); 470 } 471 472 int 473 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 474 { 475 char realfsfile[PATH_MAX]; 476 int i; 477 478 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 479 /* the root file system can always be remounted */ 480 return (0); 481 482 /* The user may have specified a symlink in fstab, resolve the path */ 483 if (realpath(fs->fs_file, realfsfile) == NULL) { 484 /* Cannot resolve the path, use original one */ 485 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 486 } 487 488 for (i = mntsize - 1; i >= 0; --i) 489 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 490 (!isremountable(fs->fs_vfstype) || 491 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 492 return (1); 493 return (0); 494 } 495 496 int 497 isremountable(const char *vfsname) 498 { 499 const char **cp; 500 501 for (cp = remountable_fs_names; *cp; cp++) 502 if (strcmp(*cp, vfsname) == 0) 503 return (1); 504 return (0); 505 } 506 507 int 508 hasopt(const char *mntopts, const char *option) 509 { 510 int negative, found; 511 char *opt, *optbuf; 512 513 if (option[0] == 'n' && option[1] == 'o') { 514 negative = 1; 515 option += 2; 516 } else 517 negative = 0; 518 optbuf = strdup(mntopts); 519 found = 0; 520 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 521 if (opt[0] == 'n' && opt[1] == 'o') { 522 if (!strcasecmp(opt + 2, option)) 523 found = negative; 524 } else if (!strcasecmp(opt, option)) 525 found = !negative; 526 } 527 free(optbuf); 528 return (found); 529 } 530 531 static void 532 append_arg(struct cpa *sa, char *arg) 533 { 534 if (sa->c + 1 == sa->sz) { 535 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 536 sa->a = realloc(sa->a, sizeof(sa->a) * sa->sz); 537 if (sa->a == NULL) 538 errx(1, "realloc failed"); 539 } 540 sa->a[++sa->c] = arg; 541 } 542 543 int 544 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 545 const char *options, const char *mntopts) 546 { 547 struct statfs sf; 548 int i, ret; 549 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 550 static struct cpa mnt_argv; 551 552 /* resolve the mountpoint with realpath(3) */ 553 if (checkpath(name, mntpath) != 0) { 554 warn("%s", mntpath); 555 return (1); 556 } 557 name = mntpath; 558 559 if (mntopts == NULL) 560 mntopts = ""; 561 optbuf = catopt(strdup(mntopts), options); 562 563 if (strcmp(name, "/") == 0) 564 flags |= MNT_UPDATE; 565 if (flags & MNT_FORCE) 566 optbuf = catopt(optbuf, "force"); 567 if (flags & MNT_RDONLY) 568 optbuf = catopt(optbuf, "ro"); 569 /* 570 * XXX 571 * The mount_mfs (newfs) command uses -o to select the 572 * optimization mode. We don't pass the default "-o rw" 573 * for that reason. 574 */ 575 if (flags & MNT_UPDATE) 576 optbuf = catopt(optbuf, "update"); 577 578 /* Compatibility glue. */ 579 if (strcmp(vfstype, "msdos") == 0) { 580 warnx( 581 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated."); 582 vfstype = "msdosfs"; 583 } 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 strcpy(execname, mountprog); 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 printf("exec: %s", execname); 601 else 602 printf("mount -t %s", vfstype); 603 for (i = 1; i < mnt_argv.c; i++) 604 (void)printf(" %s", mnt_argv.a[i]); 605 (void)printf("\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 warn("statfs %s", name); 625 return (1); 626 } 627 if (fstab_style) 628 putfsent(&sf); 629 else 630 prmount(&sf); 631 } 632 633 return (ret); 634 } 635 636 void 637 prmount(struct statfs *sfp) 638 { 639 uint64_t flags; 640 unsigned int i; 641 struct opt *o; 642 struct passwd *pw; 643 644 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 645 sfp->f_fstypename); 646 647 flags = sfp->f_flags & MNT_VISFLAGMASK; 648 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 649 if (flags & o->o_opt) { 650 (void)printf(", %s", o->o_name); 651 flags &= ~o->o_opt; 652 } 653 /* 654 * Inform when file system is mounted by an unprivileged user 655 * or privileged non-root user. 656 */ 657 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 658 (void)printf(", mounted by "); 659 if ((pw = getpwuid(sfp->f_owner)) != NULL) 660 (void)printf("%s", pw->pw_name); 661 else 662 (void)printf("%d", sfp->f_owner); 663 } 664 if (verbose) { 665 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 666 (void)printf(", writes: sync %ju async %ju", 667 (uintmax_t)sfp->f_syncwrites, 668 (uintmax_t)sfp->f_asyncwrites); 669 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 670 (void)printf(", reads: sync %ju async %ju", 671 (uintmax_t)sfp->f_syncreads, 672 (uintmax_t)sfp->f_asyncreads); 673 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 674 printf(", fsid "); 675 for (i = 0; i < sizeof(sfp->f_fsid); i++) 676 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 677 } 678 } 679 (void)printf(")\n"); 680 } 681 682 struct statfs * 683 getmntpt(const char *name) 684 { 685 struct statfs *mntbuf; 686 int i, mntsize; 687 688 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 689 for (i = mntsize - 1; i >= 0; i--) { 690 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 691 strcmp(mntbuf[i].f_mntonname, name) == 0) 692 return (&mntbuf[i]); 693 } 694 return (NULL); 695 } 696 697 char * 698 catopt(char *s0, const char *s1) 699 { 700 size_t i; 701 char *cp; 702 703 if (s1 == NULL || *s1 == '\0') 704 return (s0); 705 706 if (s0 && *s0) { 707 i = strlen(s0) + strlen(s1) + 1 + 1; 708 if ((cp = malloc(i)) == NULL) 709 errx(1, "malloc failed"); 710 (void)snprintf(cp, i, "%s,%s", s0, s1); 711 } else 712 cp = strdup(s1); 713 714 if (s0) 715 free(s0); 716 return (cp); 717 } 718 719 void 720 mangle(char *options, struct cpa *a) 721 { 722 char *p, *s, *val; 723 724 for (s = options; (p = strsep(&s, ",")) != NULL;) 725 if (*p != '\0') { 726 if (strcmp(p, "noauto") == 0) { 727 /* 728 * Do not pass noauto option to nmount(). 729 * or external mount program. noauto is 730 * only used to prevent mounting a filesystem 731 * when 'mount -a' is specified, and is 732 * not a real mount option. 733 */ 734 continue; 735 } else if (strcmp(p, "late") == 0) { 736 /* 737 * "late" is used to prevent certain file 738 * systems from being mounted before late 739 * in the boot cycle; for instance, 740 * loopback NFS mounts can't be mounted 741 * before mountd starts. 742 */ 743 continue; 744 } else if (strcmp(p, "failok") == 0) { 745 /* 746 * "failok" is used to prevent certain file 747 * systems from being causing the system to 748 * drop into single user mode in the boot 749 * cycle, and is not a real mount option. 750 */ 751 continue; 752 } else if (strncmp(p, "mountprog", 9) == 0) { 753 /* 754 * "mountprog" is used to force the use of 755 * userland mount programs. 756 */ 757 val = strchr(p, '='); 758 if (val != NULL) { 759 ++val; 760 if (*val != '\0') 761 mountprog = strdup(val); 762 } 763 764 if (mountprog == NULL) { 765 errx(1, "Need value for -o mountprog"); 766 } 767 continue; 768 } else if (strcmp(p, "userquota") == 0) { 769 continue; 770 } else if (strncmp(p, userquotaeq, 771 sizeof(userquotaeq) - 1) == 0) { 772 continue; 773 } else if (strcmp(p, "groupquota") == 0) { 774 continue; 775 } else if (strncmp(p, groupquotaeq, 776 sizeof(groupquotaeq) - 1) == 0) { 777 continue; 778 } else if (*p == '-') { 779 append_arg(a, p); 780 p = strchr(p, '='); 781 if (p != NULL) { 782 *p = '\0'; 783 append_arg(a, p + 1); 784 } 785 } else { 786 append_arg(a, strdup("-o")); 787 append_arg(a, p); 788 } 789 } 790 } 791 792 793 char * 794 update_options(char *opts, char *fstab, int curflags) 795 { 796 char *o, *p; 797 char *cur; 798 char *expopt, *newopt, *tmpopt; 799 800 if (opts == NULL) 801 return (strdup("")); 802 803 /* remove meta options from list */ 804 remopt(fstab, MOUNT_META_OPTION_FSTAB); 805 remopt(fstab, MOUNT_META_OPTION_CURRENT); 806 cur = flags2opts(curflags); 807 808 /* 809 * Expand all meta-options passed to us first. 810 */ 811 expopt = NULL; 812 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 813 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 814 expopt = catopt(expopt, fstab); 815 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 816 expopt = catopt(expopt, cur); 817 else 818 expopt = catopt(expopt, o); 819 } 820 free(cur); 821 free(opts); 822 823 /* 824 * Remove previous contradictory arguments. Given option "foo" we 825 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 826 * and "foo" - so we can deal with possible options like "notice". 827 */ 828 newopt = NULL; 829 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 830 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 831 errx(1, "malloc failed"); 832 833 strcpy(tmpopt, "no"); 834 strcat(tmpopt, o); 835 remopt(newopt, tmpopt); 836 free(tmpopt); 837 838 if (strncmp("no", o, 2) == 0) 839 remopt(newopt, o+2); 840 841 newopt = catopt(newopt, o); 842 } 843 free(expopt); 844 845 return (newopt); 846 } 847 848 void 849 remopt(char *string, const char *opt) 850 { 851 char *o, *p, *r; 852 853 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 854 return; 855 856 r = string; 857 858 for (p = string; (o = strsep(&p, ",")) != NULL;) { 859 if (strcmp(opt, o) != 0) { 860 if (*r == ',' && *o != '\0') 861 r++; 862 while ((*r++ = *o++) != '\0') 863 ; 864 *--r = ','; 865 } 866 } 867 *r = '\0'; 868 } 869 870 void 871 usage(void) 872 { 873 874 (void)fprintf(stderr, "%s\n%s\n%s\n", 875 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 876 " mount [-dfpruvw] special | node", 877 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 878 exit(1); 879 } 880 881 void 882 putfsent(struct statfs *ent) 883 { 884 struct fstab *fst; 885 char *opts, *rw; 886 int l; 887 888 opts = NULL; 889 /* flags2opts() doesn't return the "rw" option. */ 890 if ((ent->f_flags & MNT_RDONLY) != 0) 891 rw = NULL; 892 else 893 rw = catopt(NULL, "rw"); 894 895 opts = flags2opts(ent->f_flags); 896 opts = catopt(rw, opts); 897 898 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 899 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 900 strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8) 901 +1)); 902 } 903 904 l = strlen(ent->f_mntfromname); 905 printf("%s%s%s%s", ent->f_mntfromname, 906 l < 8 ? "\t" : "", 907 l < 16 ? "\t" : "", 908 l < 24 ? "\t" : " "); 909 l = strlen(ent->f_mntonname); 910 printf("%s%s%s%s", ent->f_mntonname, 911 l < 8 ? "\t" : "", 912 l < 16 ? "\t" : "", 913 l < 24 ? "\t" : " "); 914 printf("%s\t", ent->f_fstypename); 915 l = strlen(opts); 916 printf("%s%s", opts, 917 l < 8 ? "\t" : " "); 918 free(opts); 919 920 if ((fst = getfsspec(ent->f_mntfromname))) 921 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 922 else if ((fst = getfsfile(ent->f_mntonname))) 923 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 924 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 925 if (strcmp(ent->f_mntonname, "/") == 0) 926 printf("\t1 1\n"); 927 else 928 printf("\t2 2\n"); 929 } else 930 printf("\t0 0\n"); 931 } 932 933 934 char * 935 flags2opts(int flags) 936 { 937 char *res; 938 939 res = NULL; 940 941 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 942 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 943 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 944 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 945 if (flags & MNT_UNION) res = catopt(res, "union"); 946 if (flags & MNT_ASYNC) res = catopt(res, "async"); 947 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 948 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 949 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 950 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 951 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 952 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 953 if (flags & MNT_ACLS) res = catopt(res, "acls"); 954 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 955 956 return (res); 957 } 958