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 * 3. 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 * @(#) Copyright (c) 1980, 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)mount.c 8.25 (Berkeley) 5/8/95 31 * $FreeBSD: src/sbin/mount/mount.c,v 1.39.2.3 2001/08/01 08:26:23 obrien Exp $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/mount.h> 36 #include <sys/mountctl.h> 37 #define DKTYPENAMES 38 #include <sys/dtype.h> 39 #include <sys/diskslice.h> 40 #include <sys/stat.h> 41 #include <sys/wait.h> 42 43 #include <err.h> 44 #include <errno.h> 45 #include <fcntl.h> 46 #include <fstab.h> 47 #include <mntopts.h> 48 #include <pwd.h> 49 #include <signal.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <libutil.h> 55 56 #include "extern.h" 57 #include "pathnames.h" 58 59 /* `meta' options */ 60 #define MOUNT_META_OPTION_FSTAB "fstab" 61 #define MOUNT_META_OPTION_CURRENT "current" 62 63 int debug, fstab_style, verbose; 64 65 static char *catopt(char *, const char *); 66 static struct statfs 67 *getmntpt(const char *); 68 static int hasopt(const char *, const char *); 69 static int ismounted(struct fstab *, struct statfs *, int); 70 static int isremountable(const char *); 71 static void mangle(char *, int *, const char **); 72 static char *update_options(char *, char *, int); 73 static int mountfs(const char *, const char *, const char *, 74 int, const char *, const char *); 75 static void remopt(char *, const char *); 76 static void printdefvals(const struct statfs *); 77 static void prmount(struct statfs *); 78 static void putfsent(const struct statfs *); 79 static void usage(void); 80 static char *flags2opts(int); 81 static char *xstrdup(const char *str); 82 static void checkdisklabel(const char *devpath, const char **vfstypep); 83 84 /* 85 * List of VFS types that can be remounted without becoming mounted on top 86 * of each other. 87 * XXX Is this list correct? 88 */ 89 static const char *remountable_fs_names[] = { 90 "ufs", "ffs", "ext2fs", "hammer", "hammer2", 91 NULL 92 }; 93 94 static void 95 restart_mountd(void) 96 { 97 struct pidfh *pfh; 98 pid_t mountdpid; 99 100 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 101 if (pfh != NULL) { 102 /* Mountd is not running. */ 103 pidfile_remove(pfh); 104 return; 105 } 106 if (errno != EEXIST) { 107 /* Cannot open pidfile for some reason. */ 108 return; 109 } 110 111 /* 112 * We have mountd(8) PID in mountdpid varible, let's signal it. 113 * Silently ignore any error. mountd might not be signalable for 114 * various reasons (jail, different reaper, bad /var/run/mountd.pid 115 * file, etc) 116 */ 117 kill(mountdpid, SIGUSR1); 118 } 119 120 int 121 main(int argc, char **argv) 122 { 123 const char *mntfromname, **vfslist, *vfstype; 124 struct fstab *fs; 125 struct statfs *mntbuf; 126 int all, ch, i, init_flags, mntsize, rval, have_fstab; 127 char *options; 128 129 all = init_flags = 0; 130 options = NULL; 131 vfslist = NULL; 132 vfstype = "ufs"; 133 while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) { 134 switch (ch) { 135 case 'a': 136 all = 1; 137 break; 138 case 'd': 139 debug = 1; 140 break; 141 case 'F': 142 setfstab(optarg); 143 break; 144 case 'f': 145 init_flags |= MNT_FORCE; 146 break; 147 case 'o': 148 if (*optarg) 149 options = catopt(options, optarg); 150 break; 151 case 'p': 152 fstab_style = 1; 153 verbose = 1; 154 break; 155 case 'r': 156 options = catopt(options, "ro"); 157 break; 158 case 't': 159 if (vfslist != NULL) 160 errx(1, "only one -t option may be specified"); 161 vfslist = makevfslist(optarg); 162 vfstype = optarg; 163 break; 164 case 'u': 165 init_flags |= MNT_UPDATE; 166 break; 167 case 'v': 168 verbose = 1; 169 break; 170 case 'w': 171 options = catopt(options, "noro"); 172 break; 173 case '?': 174 default: 175 usage(); 176 /* NOTREACHED */ 177 } 178 } 179 argc -= optind; 180 argv += optind; 181 182 #define BADTYPE(type) \ 183 (strcmp(type, FSTAB_RO) && \ 184 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 185 186 rval = 0; 187 switch (argc) { 188 case 0: 189 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 190 err(1, "getmntinfo"); 191 if (all) { 192 while ((fs = getfsent()) != NULL) { 193 if (BADTYPE(fs->fs_type)) 194 continue; 195 if (checkvfsname(fs->fs_vfstype, vfslist)) 196 continue; 197 if (hasopt(fs->fs_mntops, "noauto")) 198 continue; 199 if (!(init_flags & MNT_UPDATE) && 200 ismounted(fs, mntbuf, mntsize)) 201 continue; 202 options = update_options(options, 203 fs->fs_mntops, mntbuf->f_flags); 204 if (mountfs(fs->fs_vfstype, fs->fs_spec, 205 fs->fs_file, init_flags, options, 206 fs->fs_mntops)) 207 rval = 1; 208 } 209 } else if (fstab_style) { 210 for (i = 0; i < mntsize; i++) { 211 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 212 continue; 213 putfsent(&mntbuf[i]); 214 } 215 } else { 216 for (i = 0; i < mntsize; i++) { 217 if (checkvfsname(mntbuf[i].f_fstypename, 218 vfslist)) 219 continue; 220 prmount(&mntbuf[i]); 221 } 222 } 223 exit(rval); 224 case 1: 225 if (vfslist != NULL) 226 usage(); 227 228 rmslashes(*argv, *argv); 229 230 if (init_flags & MNT_UPDATE) { 231 mntfromname = NULL; 232 have_fstab = 0; 233 if ((mntbuf = getmntpt(*argv)) == NULL) 234 errx(1, "not currently mounted %s", *argv); 235 /* 236 * Only get the mntflags from fstab if both mntpoint 237 * and mntspec are identical. Also handle the special 238 * case where just '/' is mounted and 'spec' is not 239 * identical with the one from fstab ('/dev' is missing 240 * in the spec-string at boot-time). 241 */ 242 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 243 if (strcmp(fs->fs_spec, 244 mntbuf->f_mntfromname) == 0 && 245 strcmp(fs->fs_file, 246 mntbuf->f_mntonname) == 0) { 247 have_fstab = 1; 248 mntfromname = mntbuf->f_mntfromname; 249 } else if (argv[0][0] == '/' && 250 argv[0][1] == '\0') { 251 fs = getfsfile("/"); 252 have_fstab = 1; 253 mntfromname = fs->fs_spec; 254 } 255 } 256 if (have_fstab) { 257 options = update_options(options, fs->fs_mntops, 258 mntbuf->f_flags); 259 } else { 260 mntfromname = mntbuf->f_mntfromname; 261 options = update_options(options, NULL, 262 mntbuf->f_flags); 263 } 264 rval = mountfs(mntbuf->f_fstypename, mntfromname, 265 mntbuf->f_mntonname, init_flags, options, 0); 266 break; 267 } 268 if ((fs = getfsfile(*argv)) == NULL && 269 (fs = getfsspec(*argv)) == NULL) 270 errx(1, "%s: unknown special file or file system", 271 *argv); 272 if (BADTYPE(fs->fs_type)) 273 errx(1, "%s has unknown file system type", 274 *argv); 275 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 276 init_flags, options, fs->fs_mntops); 277 break; 278 case 2: 279 /* 280 * If -t flag has not been specified, the path cannot be 281 * found. 282 * 283 * If the spec is not a file and contains a ':' then assume 284 * NFS. 285 * 286 * If the spec is not a file and contains a '@' then assume 287 * HAMMER2. Note that there may not be a raw device 288 * specified in this situation. 289 * 290 * If the spec is a cdev attempt to extract the fstype from 291 * the label. 292 * 293 * When all else fails ufs is assumed. 294 */ 295 if (vfslist == NULL) { 296 if (strpbrk(argv[0], ":") != NULL && 297 access(argv[0], 0) == -1) { 298 vfstype = "nfs"; 299 } else if (strpbrk(argv[0], "@") != NULL && 300 access(argv[0], 0) == -1) { 301 vfstype = "hammer2"; 302 } else { 303 checkdisklabel(argv[0], &vfstype); 304 } 305 } 306 307 rval = mountfs(vfstype, getdevpath(argv[0], 0), argv[1], 308 init_flags, options, NULL); 309 break; 310 default: 311 usage(); 312 /* NOTREACHED */ 313 } 314 315 /* 316 * If the mount was successfully, and done by root, tell mountd the 317 * good news. 318 */ 319 if (rval == 0 && getuid() == 0) 320 restart_mountd(); 321 322 exit(rval); 323 } 324 325 static int 326 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 327 { 328 int i; 329 330 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 331 /* the root file system can always be remounted */ 332 return (0); 333 334 for (i = mntsize - 1; i >= 0; --i) 335 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 336 (!isremountable(fs->fs_vfstype) || 337 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 338 return (1); 339 return (0); 340 } 341 342 static int 343 isremountable(const char *vfsname) 344 { 345 const char **cp; 346 347 for (cp = remountable_fs_names; *cp; cp++) 348 if (strcmp(*cp, vfsname) == 0) 349 return (1); 350 return (0); 351 } 352 353 static int 354 hasopt(const char *mntopts, const char *option) 355 { 356 int negative, found; 357 char *opt, *optbuf; 358 359 if (option[0] == 'n' && option[1] == 'o') { 360 negative = 1; 361 option += 2; 362 } else 363 negative = 0; 364 optbuf = xstrdup(mntopts); 365 found = 0; 366 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 367 if (opt[0] == 'n' && opt[1] == 'o') { 368 if (!strcasecmp(opt + 2, option)) 369 found = negative; 370 } else if (!strcasecmp(opt, option)) 371 found = !negative; 372 } 373 free(optbuf); 374 return (found); 375 } 376 377 static int 378 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 379 const char *options, const char *mntopts) 380 { 381 /* List of directories containing mount_xxx subcommands. */ 382 static const char *edirs[] = { 383 _PATH_SBIN, 384 _PATH_USRSBIN, 385 NULL 386 }; 387 const char *argv[100], **edir; 388 struct statfs sf; 389 pid_t pid; 390 int argc, i, status; 391 char *optbuf; 392 char *argv0; 393 char execname[MAXPATHLEN + 1]; 394 char mntpath[MAXPATHLEN]; 395 396 /* resolve the mountpoint with realpath(3) */ 397 checkpath(name, mntpath); 398 name = mntpath; 399 400 if (mntopts == NULL) 401 mntopts = ""; 402 if (options == NULL) { 403 if (*mntopts == '\0') { 404 options = "rw"; 405 } else { 406 options = mntopts; 407 mntopts = ""; 408 } 409 } 410 optbuf = catopt(xstrdup(mntopts), options); 411 412 if (strcmp(name, "/") == 0) 413 flags |= MNT_UPDATE; 414 if (flags & MNT_FORCE) 415 optbuf = catopt(optbuf, "force"); 416 if (flags & MNT_RDONLY) 417 optbuf = catopt(optbuf, "ro"); 418 /* 419 * XXX 420 * The mount_mfs (newfs) command uses -o to select the 421 * optimization mode. We don't pass the default "-o rw" 422 * for that reason. 423 */ 424 if (flags & MNT_UPDATE) 425 optbuf = catopt(optbuf, "update"); 426 427 asprintf(&argv0, "mount_%s", vfstype); 428 429 argc = 0; 430 argv[argc++] = argv0; 431 mangle(optbuf, &argc, argv); 432 argv[argc++] = spec; 433 argv[argc++] = name; 434 argv[argc] = NULL; 435 436 if (debug) { 437 printf("exec: mount_%s", vfstype); 438 for (i = 1; i < argc; i++) 439 printf(" %s", argv[i]); 440 printf("\n"); 441 return (0); 442 } 443 444 switch (pid = fork()) { 445 case -1: /* Error. */ 446 warn("fork"); 447 free(optbuf); 448 return (1); 449 case 0: /* Child. */ 450 /* Go find an executable. */ 451 for (edir = edirs; *edir; edir++) { 452 snprintf(execname, sizeof(execname), 453 "%s/mount_%s", *edir, vfstype); 454 execv(execname, __DECONST(char * const *, argv)); 455 } 456 if (errno == ENOENT) { 457 int len = 0; 458 char *cp; 459 for (edir = edirs; *edir; edir++) 460 len += strlen(*edir) + 2; /* ", " */ 461 if ((cp = malloc(len)) == NULL) 462 errx(1, "malloc failed"); 463 cp[0] = '\0'; 464 for (edir = edirs; *edir; edir++) { 465 strcat(cp, *edir); 466 if (edir[1] != NULL) 467 strcat(cp, ", "); 468 } 469 warn("exec mount_%s not found in %s", vfstype, cp); 470 } 471 exit(1); 472 /* NOTREACHED */ 473 default: /* Parent. */ 474 free(optbuf); 475 476 if (waitpid(pid, &status, 0) < 0) { 477 warn("waitpid"); 478 return (1); 479 } 480 481 if (WIFEXITED(status)) { 482 if (WEXITSTATUS(status) != 0) 483 return (WEXITSTATUS(status)); 484 } else if (WIFSIGNALED(status)) { 485 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 486 return (1); 487 } 488 489 if (verbose) { 490 if (statfs(name, &sf) < 0) { 491 warn("statfs %s", name); 492 return (1); 493 } 494 if (fstab_style) 495 putfsent(&sf); 496 else 497 prmount(&sf); 498 } 499 break; 500 } 501 502 return (0); 503 } 504 505 static void 506 prmount(struct statfs *sfp) 507 { 508 struct passwd *pw; 509 char *buf; 510 int error; 511 int len; 512 513 error = 0; 514 len = 256; 515 516 if ((buf = malloc(len)) == NULL) 517 errx(1, "malloc failed"); 518 519 printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 520 sfp->f_fstypename); 521 522 /* Get a string buffer with all the used flags names */ 523 error = mountctl(sfp->f_mntonname, MOUNTCTL_MOUNTFLAGS, 524 -1, NULL, 0, buf, len); 525 526 if (sfp->f_owner) { 527 printf(", mounted by "); 528 if ((pw = getpwuid(sfp->f_owner)) != NULL) 529 printf("%s", pw->pw_name); 530 else 531 printf("%d", sfp->f_owner); 532 } 533 534 if (error != -1 && strlen(buf)) 535 printf(", %s", buf); 536 537 if (verbose) { 538 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 539 printf(", writes: sync %ld async %ld", 540 sfp->f_syncwrites, sfp->f_asyncwrites); 541 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 542 printf(", reads: sync %ld async %ld", 543 sfp->f_syncreads, sfp->f_asyncreads); 544 } 545 printf(")\n"); 546 } 547 548 static struct statfs * 549 getmntpt(const char *name) 550 { 551 struct statfs *mntbuf; 552 int i, mntsize; 553 554 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 555 for (i = mntsize - 1; i >= 0; i--) { 556 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 557 strcmp(mntbuf[i].f_mntonname, name) == 0) 558 return (&mntbuf[i]); 559 } 560 return (NULL); 561 } 562 563 static char * 564 catopt(char *s0, const char *s1) 565 { 566 size_t i; 567 char *cp; 568 569 if (s1 == NULL || *s1 == '\0') 570 return s0; 571 572 if (s0 && *s0) { 573 i = strlen(s0) + strlen(s1) + 1 + 1; 574 if ((cp = malloc(i)) == NULL) 575 errx(1, "malloc failed"); 576 snprintf(cp, i, "%s,%s", s0, s1); 577 } else 578 cp = xstrdup(s1); 579 580 if (s0) 581 free(s0); 582 return (cp); 583 } 584 585 static void 586 mangle(char *options, int *argcp, const char **argv) 587 { 588 char *p, *s; 589 int argc; 590 591 argc = *argcp; 592 for (s = options; (p = strsep(&s, ",")) != NULL;) 593 if (*p != '\0') { 594 if (*p == '-') { 595 argv[argc++] = p; 596 p = strchr(p, '='); 597 if (p) { 598 *p = '\0'; 599 argv[argc++] = p+1; 600 } 601 } else if (strcmp(p, "rw") != 0) { 602 argv[argc++] = "-o"; 603 argv[argc++] = p; 604 } 605 } 606 607 *argcp = argc; 608 } 609 610 611 static char * 612 update_options(char *opts, char *fstab, int curflags) 613 { 614 char *o, *p; 615 char *cur; 616 char *expopt, *newopt, *tmpopt; 617 618 if (opts == NULL) 619 return xstrdup(""); 620 621 /* remove meta options from list */ 622 remopt(fstab, MOUNT_META_OPTION_FSTAB); 623 remopt(fstab, MOUNT_META_OPTION_CURRENT); 624 cur = flags2opts(curflags); 625 626 /* 627 * Expand all meta-options passed to us first. 628 */ 629 expopt = NULL; 630 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 631 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 632 expopt = catopt(expopt, fstab); 633 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 634 expopt = catopt(expopt, cur); 635 else 636 expopt = catopt(expopt, o); 637 } 638 free(cur); 639 free(opts); 640 641 /* 642 * Remove previous contradictory arguments. Given option "foo" we 643 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 644 * and "foo" - so we can deal with possible options like "notice". 645 */ 646 newopt = NULL; 647 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 648 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 649 errx(1, "malloc failed"); 650 651 strcpy(tmpopt, "no"); 652 strcat(tmpopt, o); 653 remopt(newopt, tmpopt); 654 free(tmpopt); 655 656 if (strncmp("no", o, 2) == 0) 657 remopt(newopt, o+2); 658 659 newopt = catopt(newopt, o); 660 } 661 free(expopt); 662 663 return newopt; 664 } 665 666 static void 667 remopt(char *string, const char *opt) 668 { 669 char *o, *p, *r; 670 671 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 672 return; 673 674 r = string; 675 676 for (p = string; (o = strsep(&p, ",")) != NULL;) { 677 if (strcmp(opt, o) != 0) { 678 if (*r == ',' && *o != '\0') 679 r++; 680 while ((*r++ = *o++) != '\0') 681 ; 682 *--r = ','; 683 } 684 } 685 *r = '\0'; 686 } 687 688 static void 689 usage(void) 690 { 691 692 fprintf(stderr, "%s\n%s\n%s\n", 693 "usage: mount [-adfpruvw] [-F fstab] [-o options] [-t type]", 694 " mount [-dfpruvw] {special | node}", 695 " mount [-dfpruvw] [-o options] [-t type] special node"); 696 exit(1); 697 } 698 699 /* 700 * Prints the default values for dump frequency and pass number of fsck. 701 * This happens when mount(8) is called with -p and there is no fstab file 702 * or there is but the values aren't specified. 703 */ 704 static void 705 printdefvals(const struct statfs *ent) 706 { 707 if (strcmp(ent->f_fstypename, "ufs") == 0) { 708 if (strcmp(ent->f_mntonname, "/") == 0) 709 printf("\t1 1\n"); 710 else 711 printf("\t2 2\n"); 712 } else { 713 printf("\t0 0\n"); 714 } 715 } 716 717 static void 718 putfsent(const struct statfs *ent) 719 { 720 struct stat sb; 721 struct fstab *fst; 722 char *opts; 723 724 opts = flags2opts(ent->f_flags); 725 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 726 ent->f_fstypename, opts); 727 free(opts); 728 729 /* 730 * If fstab file is missing don't call getfsspec() or getfsfile() 731 * at all, because the same warning will be printed twice for every 732 * mounted filesystem. 733 */ 734 if (stat(_PATH_FSTAB, &sb) != -1) { 735 if ((fst = getfsspec(ent->f_mntfromname))) 736 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 737 else if ((fst = getfsfile(ent->f_mntonname))) 738 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 739 else 740 printdefvals(ent); 741 } else { 742 printdefvals(ent); 743 } 744 } 745 746 747 static char * 748 flags2opts(int flags) 749 { 750 char *res; 751 752 res = NULL; 753 754 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 755 756 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 757 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 758 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 759 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 760 if (flags & MNT_ASYNC) res = catopt(res, "async"); 761 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 762 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 763 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 764 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 765 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 766 if (flags & MNT_IGNORE) res = catopt(res, "ignore"); 767 768 return res; 769 } 770 771 static char* 772 xstrdup(const char *str) 773 { 774 char* ret = strdup(str); 775 if(ret == NULL) { 776 errx(1, "strdup failed (could not allocate memory)"); 777 } 778 return ret; 779 } 780 781 /* 782 * Hack 'cd9660' for the default fstype on cd media if no disklabel 783 * found. 784 */ 785 static int 786 iscdmedia(const char *path, int fd __unused) 787 { 788 int n; 789 790 if (strrchr(path, '/')) 791 path = strrchr(path, '/') + 1; 792 if (sscanf(path, "acd%d", &n) == 1) 793 return 1; 794 if (sscanf(path, "cd%d", &n) == 1) 795 return 1; 796 return 0; 797 } 798 799 /* 800 * If the device path is a cdev attempt to access the disklabel to determine 801 * the filesystem type. Adjust *vfstypep if we can figure it out 802 * definitively. 803 * 804 * Ignore any portion of the device path after an '@' or ':'. 805 */ 806 static void 807 checkdisklabel(const char *devpath, const char **vfstypep) 808 { 809 struct stat st; 810 struct partinfo info; 811 char *path = strdup(devpath); 812 int fd; 813 814 if (strchr(path, '@')) 815 *strchr(path, '@') = 0; 816 if (strchr(path, ':')) 817 *strchr(path, ':') = 0; 818 819 if (stat(path, &st) < 0) 820 goto done; 821 if (!S_ISCHR(st.st_mode)) 822 goto done; 823 fd = open(path, O_RDONLY); 824 if (fd < 0) 825 goto done; 826 if (ioctl(fd, DIOCGPART, &info) == 0) { 827 if (info.fstype >= 0 && info.fstype < (int)FSMAXTYPES) { 828 if (fstype_to_vfsname[info.fstype]) { 829 *vfstypep = fstype_to_vfsname[info.fstype]; 830 } else if (iscdmedia(path, fd)) { 831 *vfstypep = "cd9660"; 832 } else { 833 fprintf(stderr, 834 "mount: warning: fstype in disklabel " 835 "not set to anything I understand\n"); 836 fprintf(stderr, 837 "attempting to mount with -t ufs\n"); 838 } 839 } 840 } 841 close(fd); 842 done: 843 free(path); 844 } 845