mount.c revision 1.108
1 /* $NetBSD: mount.c,v 1.108 2025/07/01 17:55:05 kre Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1980, 1989, 1993, 1994\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 41 #else 42 __RCSID("$NetBSD: mount.c,v 1.108 2025/07/01 17:55:05 kre Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/mount.h> 48 #include <sys/wait.h> 49 50 #include <fs/puffs/puffs_msgif.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <fstab.h> 55 #include <pwd.h> 56 #include <signal.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <util.h> 62 63 #define MOUNTNAMES 64 #include <fcntl.h> 65 #include <sys/disk.h> 66 #include <sys/disklabel.h> 67 #include <sys/ioctl.h> 68 69 #include "pathnames.h" 70 #include "mountprog.h" 71 72 static int debug, verbose, noise; 73 74 static void catopt(char **, const char *); 75 static const char * 76 getfslab(const char *str); 77 static struct statvfs * 78 getmntpt(const char *); 79 static int getmntargs(struct statvfs *, char *, size_t); 80 static int hasopt(const char *, const char *); 81 static void mangle(char *, int *, const char ** volatile *, int *); 82 static int mountfs(const char *, const char *, const char *, 83 int, const char *, const char *, int, char *, size_t); 84 static void prmount(struct statvfs *); 85 __dead static void usage(void); 86 87 88 /* Map from mount options to printable formats. */ 89 static const struct opt { 90 int o_opt; 91 int o_silent; 92 const char *o_name; 93 } optnames[] = { 94 __MNT_FLAGS 95 }; 96 97 #define FLG_UPDATE 1 98 #define FLG_RDONLY 2 99 #define FLG_RDWRITE 4 100 #define FLG_FORCE 8 101 102 static const char ffs_fstype[] = "ffs"; 103 104 int 105 main(int argc, char *argv[]) 106 { 107 const char *mntfromname, *mntonname, **vfslist, *vfstype; 108 struct fstab *fs; 109 struct statvfs *mntbuf; 110 #if 0 111 FILE *mountdfp; 112 #endif 113 int all, ch, forceall, i, init_flags, mntsize, rval; 114 char *options; 115 const char *mountopts, *fstypename; 116 char canonical_path_buf[MAXPATHLEN], buf[MAXPATHLEN]; 117 char *canonical_path; 118 119 /* started as "mount" */ 120 all = forceall = init_flags = 0; 121 options = NULL; 122 vfslist = NULL; 123 vfstype = ffs_fstype; 124 while ((ch = getopt(argc, argv, "Aadfo:rwt:uv")) != -1) 125 switch (ch) { 126 case 'A': 127 all = forceall = 1; 128 break; 129 case 'a': 130 all = 1; 131 break; 132 case 'd': 133 debug = 1; 134 break; 135 case 'f': 136 init_flags |= FLG_FORCE; 137 break; 138 case 'o': 139 if (*optarg) 140 catopt(&options, optarg); 141 break; 142 case 'r': 143 init_flags |= FLG_RDONLY; 144 break; 145 case 't': 146 if (vfslist != NULL) 147 errx(EXIT_FAILURE, 148 "Only one -t option may be specified."); 149 vfslist = makevfslist(optarg); 150 vfstype = optarg; 151 break; 152 case 'u': 153 init_flags |= FLG_UPDATE; 154 break; 155 case 'v': 156 verbose++; 157 break; 158 case 'w': 159 init_flags |= FLG_RDWRITE; 160 break; 161 case '?': 162 default: 163 usage(); 164 /* NOTREACHED */ 165 } 166 argc -= optind; 167 argv += optind; 168 169 #define BADTYPE(type) \ 170 (strcmp(type, FSTAB_RO) && \ 171 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 172 173 noise = 0; 174 if (argc > 0 && verbose) { 175 noise = 1; 176 verbose--; 177 } 178 179 rval = 0; 180 switch (argc) { 181 case 0: 182 if (all) { 183 while ((fs = getfsent()) != NULL) { 184 if (BADTYPE(fs->fs_type)) 185 continue; 186 if (checkvfsname(fs->fs_vfstype, vfslist)) 187 continue; 188 if (hasopt(fs->fs_mntops, "noauto")) 189 continue; 190 if (strcmp(fs->fs_spec, "from_mount") == 0) { 191 if ((mntbuf = getmntpt(fs->fs_file)) 192 == NULL) 193 errx(EXIT_FAILURE, 194 "Unknown file system %s", 195 fs->fs_file); 196 mntfromname = mntbuf->f_mntfromname; 197 } else 198 mntfromname = fs->fs_spec; 199 mntfromname = getfsspecname(buf, sizeof(buf), 200 mntfromname); 201 if (mntfromname == NULL) 202 err(EXIT_FAILURE, "%s", buf); 203 if (mountfs(fs->fs_vfstype, mntfromname, 204 fs->fs_file, init_flags, options, 205 fs->fs_mntops, !forceall, NULL, 0)) 206 rval = 1; 207 } 208 } else { 209 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 210 err(EXIT_FAILURE, "getmntinfo"); 211 for (i = 0; i < mntsize; i++) { 212 if (checkvfsname(mntbuf[i].f_fstypename, 213 vfslist)) 214 continue; 215 prmount(&mntbuf[i]); 216 } 217 } 218 return rval; 219 case 1: 220 if (vfslist != NULL) { 221 usage(); 222 /* NOTREACHED */ 223 } 224 225 /* 226 * Create a canonical version of the device or mount path 227 * passed to us. It's ok for this to fail. It's also ok 228 * for the result to be exactly the same as the original. 229 */ 230 canonical_path = realpath(*argv, canonical_path_buf); 231 232 if (init_flags & FLG_UPDATE) { 233 /* 234 * Try looking up the canonical path first, 235 * then try exactly what the user entered. 236 */ 237 if ((canonical_path == NULL || 238 (mntbuf = getmntpt(canonical_path)) == NULL) && 239 (mntbuf = getmntpt(*argv)) == NULL) { 240 out: 241 errx(EXIT_FAILURE, 242 "Unknown special file or file system `%s'", 243 *argv); 244 } 245 mntfromname = mntbuf->f_mntfromname; 246 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 247 if (strcmp(fs->fs_spec, "from_mount") != 0) 248 mntfromname = fs->fs_spec; 249 /* ignore the fstab file options. */ 250 fs->fs_mntops = NULL; 251 } 252 mntonname = mntbuf->f_mntonname; 253 fstypename = mntbuf->f_fstypename; 254 mountopts = NULL; 255 } else { 256 /* 257 * Try looking up the canonical path first, 258 * then try exactly what the user entered. 259 */ 260 if (canonical_path == NULL || 261 ((fs = getfsfile(canonical_path)) == NULL && 262 (fs = getfsspec(canonical_path)) == NULL)) 263 { 264 if ((fs = getfsfile(*argv)) == NULL && 265 (fs = getfsspec(*argv)) == NULL) { 266 goto out; 267 } 268 } 269 if (BADTYPE(fs->fs_type)) 270 errx(EXIT_FAILURE, 271 "Unknown file system type for `%s'", 272 *argv); 273 if (strcmp(fs->fs_spec, "from_mount") == 0) { 274 if ((canonical_path == NULL || 275 (mntbuf = getmntpt(canonical_path)) 276 == NULL) && 277 (mntbuf = getmntpt(*argv)) == NULL) 278 goto out; 279 mntfromname = mntbuf->f_mntfromname; 280 } else 281 mntfromname = fs->fs_spec; 282 mntonname = fs->fs_file; 283 fstypename = fs->fs_vfstype; 284 mountopts = fs->fs_mntops; 285 } 286 mntfromname = getfsspecname(buf, sizeof(buf), mntfromname); 287 if (mntfromname == NULL) 288 err(EXIT_FAILURE, "%s", buf); 289 rval = mountfs(fstypename, mntfromname, 290 mntonname, init_flags, options, mountopts, 0, NULL, 0); 291 break; 292 case 2: 293 /* 294 * If -t flag has not been specified, and spec contains either 295 * a ':' or a '@' then assume that an NFS filesystem is being 296 * specified ala Sun. 297 */ 298 mntfromname = getfsspecname(buf, sizeof(buf), argv[0]); 299 if (mntfromname == NULL) 300 err(EXIT_FAILURE, "%s", buf); 301 if (vfslist == NULL) { 302 if (strpbrk(argv[0], ":@") != NULL) { 303 vfstype = "nfs"; 304 } else { 305 vfstype = getfslab(mntfromname); 306 if (vfstype == NULL) 307 vfstype = ffs_fstype; 308 } 309 } 310 rval = mountfs(vfstype, mntfromname, argv[1], init_flags, 311 options, NULL, 0, NULL, 0); 312 break; 313 default: 314 usage(); 315 } 316 317 #if 0 /* disabled because it interferes the service. */ 318 /* 319 * If the mount was successfully, and done by root, tell mountd the 320 * good news. Pid checks are probably unnecessary, but don't hurt. 321 */ 322 if (rval == 0 && getuid() == 0 && 323 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 324 int pid; 325 326 if (fscanf(mountdfp, "%d", &pid) == 1 && 327 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 328 err(EXIT_FAILURE, "signal mountd"); 329 (void)fclose(mountdfp); 330 } 331 #endif 332 333 return rval; 334 } 335 336 int 337 hasopt(const char *mntopts, const char *option) 338 { 339 int negative, found; 340 char *opt, *optbuf; 341 342 if (option[0] == 'n' && option[1] == 'o') { 343 negative = 1; 344 option += 2; 345 } else 346 negative = 0; 347 optbuf = estrdup(mntopts); 348 found = 0; 349 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 350 if (opt[0] == 'n' && opt[1] == 'o') { 351 if (!strcasecmp(opt + 2, option)) 352 found = negative; 353 } else if (!strcasecmp(opt, option)) 354 found = !negative; 355 } 356 free(optbuf); 357 return found; 358 } 359 360 static int 361 mountfs(const char *vfstype, const char *spec, const char *name, 362 int flags, const char *options, const char *mntopts, 363 int skipmounted, char *buf, size_t buflen) 364 { 365 /* List of directories containing mount_xxx subcommands. */ 366 static const char *edirs[] = { 367 #ifdef RESCUEDIR 368 RESCUEDIR, 369 #endif 370 _PATH_SBIN, 371 _PATH_USRSBIN, 372 NULL 373 }; 374 const char ** volatile argv, **edir; 375 struct statvfs *sfp, sf; 376 pid_t pid; 377 int pfd[2]; 378 int argc, numfs, i, status, maxargc; 379 char *optbuf, execname[MAXPATHLEN + 1], execbase[MAXPATHLEN], 380 mntpath[MAXPATHLEN]; 381 volatile int getargs; 382 383 if (realpath(name, mntpath) == NULL) { 384 warn("realpath `%s'", name); 385 return 1; 386 } 387 388 name = mntpath; 389 390 optbuf = NULL; 391 if (mntopts) 392 catopt(&optbuf, mntopts); 393 394 if (options) { 395 catopt(&optbuf, options); 396 getargs = strstr(options, "getargs") != NULL; 397 } else 398 getargs = 0; 399 400 if (!mntopts && !options) 401 catopt(&optbuf, "rw"); 402 403 if (getargs == 0 && strcmp(name, "/") == 0 && !hasopt(optbuf, "union")) 404 flags |= FLG_UPDATE; 405 else if (skipmounted) { 406 if ((numfs = getmntinfo(&sfp, MNT_WAIT)) == 0) { 407 warn("getmntinfo"); 408 return 1; 409 } 410 for(i = 0; i < numfs; i++) { 411 const char *mountedtype = sfp[i].f_fstypename; 412 size_t cmplen = sizeof(sfp[i].f_fstypename); 413 414 /* remove "puffs|" from comparisons, if present */ 415 #define TYPESIZE (sizeof(PUFFS_TYPEPREFIX)-1) 416 if (strncmp(mountedtype, 417 PUFFS_TYPEPREFIX, TYPESIZE) == 0) { 418 mountedtype += TYPESIZE; 419 cmplen -= TYPESIZE; 420 } 421 422 /* 423 * XXX can't check f_mntfromname, 424 * thanks to mfs, union, etc. 425 */ 426 if (strncmp(name, sfp[i].f_mntonname, MNAMELEN) == 0 && 427 strncmp(vfstype, mountedtype, cmplen) == 0) { 428 if (noise || verbose) 429 (void)printf("%s on %s type %.*s: " 430 "%s\n", 431 sfp[i].f_mntfromname, 432 sfp[i].f_mntonname, 433 (int)sizeof(sfp[i].f_fstypename), 434 sfp[i].f_fstypename, 435 "already mounted"); 436 return 0; 437 } 438 } 439 } 440 if (flags & FLG_FORCE) 441 catopt(&optbuf, "force"); 442 if (flags & FLG_RDONLY) 443 catopt(&optbuf, "ro"); 444 /* make -w override -r */ 445 if (flags & FLG_RDWRITE) 446 catopt(&optbuf, "rw"); 447 448 if (flags & FLG_UPDATE) { 449 catopt(&optbuf, "update"); 450 /* Figure out the fstype only if we defaulted to ffs */ 451 if (vfstype == ffs_fstype && statvfs(name, &sf) != -1) 452 vfstype = sf.f_fstypename; 453 } 454 455 maxargc = 64; 456 argv = ecalloc(maxargc, sizeof(*argv)); 457 458 if (getargs && 459 strncmp(vfstype, PUFFS_TYPEPREFIX, sizeof(PUFFS_TYPEPREFIX)-1) == 0) 460 (void)snprintf(execbase, sizeof(execbase), "mount_puffs"); 461 else if (hasopt(optbuf, "rump")) 462 (void)snprintf(execbase, sizeof(execbase), "rump_%s", vfstype); 463 else 464 (void)snprintf(execbase, sizeof(execbase), "mount_%s", vfstype); 465 argc = 0; 466 argv[argc++] = execbase; 467 if (optbuf) 468 mangle(optbuf, &argc, &argv, &maxargc); 469 argv[argc++] = spec; 470 argv[argc++] = name; 471 argv[argc] = NULL; 472 473 if ((verbose && buf == NULL) || debug) { 474 (void)printf("exec:"); 475 for (i = 0; i < argc; i++) 476 (void)printf(" %s", argv[i]); 477 (void)printf("\n"); 478 if (debug) { 479 /* 480 * Don't proceed to attempt to 481 * print fs data, nothing has been 482 * mounted, anything printed would 483 * be for some other filesystem. 484 */ 485 return 0; 486 } 487 } 488 489 if (buf) { 490 if (pipe(pfd) == -1) 491 warn("Cannot create pipe"); 492 } 493 494 switch (pid = fork()) { 495 case -1: /* Error. */ 496 warn("fork"); 497 if (optbuf) 498 free(optbuf); 499 free(argv); 500 return 1; 501 502 case 0: /* Child. */ 503 if (debug) 504 _exit(0); 505 506 if (buf) { 507 (void)close(pfd[0]); 508 (void)close(STDOUT_FILENO); 509 if (dup2(pfd[1], STDOUT_FILENO) == -1) 510 warn("Cannot open fd to mount program"); 511 } 512 513 /* Go find an executable. */ 514 edir = edirs; 515 do { 516 (void)snprintf(execname, 517 sizeof(execname), "%s/%s", *edir, execbase); 518 (void)execv(execname, __UNCONST(argv)); 519 if (errno != ENOENT) 520 warn("exec %s for %s", execname, name); 521 } while (*++edir != NULL); 522 523 if (errno == ENOENT) 524 warn("exec %s for %s: %s", execbase, name, execbase); 525 _exit(1); 526 /* NOTREACHED */ 527 528 default: /* Parent. */ 529 if (optbuf) 530 free(optbuf); 531 free(argv); 532 533 if (buf || getargs) { 534 char tbuf[1024], *ptr; 535 int nread; 536 537 if (buf == NULL) { 538 ptr = tbuf; 539 buflen = sizeof(tbuf) - 1; 540 } else { 541 ptr = buf; 542 buflen--; 543 } 544 (void)close(pfd[1]); 545 (void)signal(SIGPIPE, SIG_IGN); 546 while ((nread = read(pfd[0], ptr, buflen)) > 0) { 547 buflen -= nread; 548 ptr += nread; 549 } 550 *ptr = '\0'; 551 if (buflen == 0) { 552 while (read(pfd[0], &nread, sizeof(nread)) > 0) 553 continue; 554 } 555 if (buf == NULL) 556 (void)fprintf(stdout, "%s", tbuf); 557 } 558 559 if (waitpid(pid, &status, 0) == -1) { 560 warn("waitpid"); 561 return 1; 562 } 563 564 if (WIFEXITED(status)) { 565 if (WEXITSTATUS(status) != 0) 566 return WEXITSTATUS(status); 567 } else if (WIFSIGNALED(status)) { 568 warnx("%s: %s", name, strsignal(WTERMSIG(status))); 569 return 1; 570 } 571 572 if (buf == NULL) { 573 if (verbose || noise) { 574 if (statvfs(name, &sf) == -1) { 575 warn("statvfs %s", name); 576 return 1; 577 } 578 prmount(&sf); 579 } 580 } 581 break; 582 } 583 584 return 0; 585 } 586 587 static void 588 prmount(struct statvfs *sfp) 589 { 590 int flags; 591 const struct opt *o; 592 struct passwd *pw; 593 int f; 594 595 (void)printf("%s on %s type %.*s", sfp->f_mntfromname, 596 sfp->f_mntonname, (int)sizeof(sfp->f_fstypename), 597 sfp->f_fstypename); 598 599 flags = sfp->f_flag & MNT_VISFLAGMASK; 600 for (f = 0, o = optnames; flags && o < 601 &optnames[sizeof(optnames)/sizeof(optnames[0])]; o++) 602 if (flags & o->o_opt) { 603 if (!o->o_silent || verbose) 604 (void)printf("%s%s", !f++ ? " (" : ", ", 605 o->o_name); 606 flags &= ~o->o_opt; 607 } 608 if (flags) 609 (void)printf("%sunknown flag%s %#x", !f++ ? " (" : ", ", 610 flags & (flags - 1) ? "s" : "", flags); 611 if (sfp->f_owner) { 612 (void)printf("%smounted by ", !f++ ? " (" : ", "); 613 if ((pw = getpwuid(sfp->f_owner)) != NULL) 614 (void)printf("%s", pw->pw_name); 615 else 616 (void)printf("%d", sfp->f_owner); 617 } 618 if (verbose) 619 (void)printf("%sfsid: 0x%x/0x%x", 620 !f++ ? " (" /* ) */: ", ", 621 sfp->f_fsidx.__fsid_val[0], sfp->f_fsidx.__fsid_val[1]); 622 623 if (verbose) { 624 (void)printf("%s", !f++ ? " (" : ", "); 625 (void)printf("reads: sync %" PRIu64 " async %" PRIu64 "", 626 sfp->f_syncreads, sfp->f_asyncreads); 627 (void)printf(", writes: sync %" PRIu64 " async %" PRIu64 "", 628 sfp->f_syncwrites, sfp->f_asyncwrites); 629 if (verbose > 1) { 630 char buf[2048]; 631 632 if (getmntargs(sfp, buf, sizeof(buf))) 633 printf(", [%s: %s]", sfp->f_fstypename, buf); 634 } 635 printf(")\n"); 636 } else 637 (void)printf("%s", f ? ")\n" : "\n"); 638 } 639 640 static int 641 getmntargs(struct statvfs *sfs, char *buf, size_t buflen) 642 { 643 644 if (mountfs(sfs->f_fstypename, sfs->f_mntfromname, sfs->f_mntonname, 0, 645 "getargs", NULL, 0, buf, buflen)) 646 return 0; 647 else { 648 if (*buf == '\0') 649 return 0; 650 if ((buf = strchr(buf, '\n')) != NULL) 651 *buf = '\0'; 652 return 1; 653 } 654 } 655 656 static struct statvfs * 657 getmntpt(const char *name) 658 { 659 struct statvfs *mntbuf; 660 int i, mntsize; 661 662 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 663 for (i = 0; i < mntsize; i++) 664 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 665 strcmp(mntbuf[i].f_mntonname, name) == 0) 666 return &mntbuf[i]; 667 return NULL; 668 } 669 670 static void 671 catopt(char **sp, const char *o) 672 { 673 char *s, *n; 674 675 s = *sp; 676 if (s) { 677 easprintf(&n, "%s,%s", s, o); 678 free(s); 679 s = n; 680 } else 681 s = estrdup(o); 682 *sp = s; 683 } 684 685 static void 686 mangle(char *options, int *argcp, const char ** volatile *argvp, int *maxargcp) 687 { 688 char *p, *s; 689 int argc, maxargc; 690 const char **argv, **nargv; 691 692 argc = *argcp; 693 argv = *argvp; 694 maxargc = *maxargcp; 695 696 for (s = options; (p = strsep(&s, ",")) != NULL;) { 697 /* Always leave space for one more argument and the NULL. */ 698 if (argc >= maxargc - 4) { 699 nargv = erealloc(argv, (maxargc << 1) * sizeof(nargv)); 700 argv = nargv; 701 maxargc <<= 1; 702 } 703 if (*p != '\0') { 704 if (*p == '-') { 705 argv[argc++] = p; 706 p = strchr(p, '='); 707 if (p) { 708 *p = '\0'; 709 argv[argc++] = p+1; 710 } 711 } else { 712 argv[argc++] = "-o"; 713 argv[argc++] = p; 714 } 715 } 716 } 717 718 *argcp = argc; 719 *argvp = argv; 720 *maxargcp = maxargc; 721 } 722 723 /* Deduce the filesystem type from the disk label. */ 724 static const char * 725 getfslab(const char *str) 726 { 727 static struct dkwedge_info dkw; 728 struct disklabel dl; 729 int fd; 730 int part; 731 const char *vfstype; 732 u_char fstype; 733 char buf[MAXPATHLEN + 1]; 734 char *sp, *ep; 735 736 if ((fd = open(str, O_RDONLY)) == -1) { 737 /* 738 * Iff we get EBUSY try the raw device. Since mount always uses 739 * the block device we know we are never passed a raw device. 740 */ 741 if (errno != EBUSY) 742 err(EXIT_FAILURE, "cannot open `%s'", str); 743 strlcpy(buf, str, MAXPATHLEN); 744 if ((sp = strrchr(buf, '/')) != NULL) 745 ++sp; 746 else 747 sp = buf; 748 for (ep = sp + strlen(sp) + 1; ep > sp; ep--) 749 *ep = *(ep - 1); 750 *sp = 'r'; 751 752 /* Silently fail here - mount call can display error */ 753 if ((fd = open(buf, O_RDONLY)) == -1) 754 return NULL; 755 } 756 757 /* Check to see if this is a wedge. */ 758 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == 0) { 759 /* Yup, this is easy. */ 760 close(fd); 761 if (*dkw.dkw_ptype) 762 return dkw.dkw_ptype; 763 return NULL; 764 } 765 766 if (ioctl(fd, DIOCGDINFO, &dl) == -1) { 767 (void) close(fd); 768 return NULL; 769 } 770 771 (void) close(fd); 772 773 part = str[strlen(str) - 1] - 'a'; 774 775 if (part < 0 || part >= dl.d_npartitions) 776 return NULL; 777 778 /* Return NULL for unknown types - caller can fall back to ffs */ 779 if ((fstype = dl.d_partitions[part].p_fstype) >= FSMAXMOUNTNAMES) 780 vfstype = NULL; 781 else 782 vfstype = mountnames[fstype]; 783 784 return vfstype; 785 } 786 787 static void 788 usage(void) 789 { 790 791 (void)fprintf(stderr, "Usage: %s [-Aadfruvw] [-t type]\n" 792 "\t%s [-dfruvw] special | node\n" 793 "\t%s [-dfruvw] [-o options] [-t type] special node\n", 794 getprogname(), getprogname(), getprogname()); 795 exit(1); 796 } 797
Indexes created Mon Sep 29 21:09:56 GMT 2025