mount.c revision 1.97
1 /* $NetBSD: mount.c,v 1.97 2012/06/14 00:39:33 christos 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 1.97 2012/06/14 00:39:33 christos 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; 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 otions 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 static const char ffs_fstype[] = "ffs"; 98 99 int 100 main(int argc, char *argv[]) 101 { 102 const char *mntfromname, *mntonname, **vfslist, *vfstype; 103 struct fstab *fs; 104 struct statvfs *mntbuf; 105 #if 0 106 FILE *mountdfp; 107 #endif 108 int all, ch, forceall, i, init_flags, mntsize, rval; 109 char *options; 110 const char *mountopts, *fstypename; 111 char canonical_path_buf[MAXPATHLEN], buf[MAXPATHLEN]; 112 char *canonical_path; 113 114 /* started as "mount" */ 115 all = forceall = init_flags = 0; 116 options = NULL; 117 vfslist = NULL; 118 vfstype = ffs_fstype; 119 while ((ch = getopt(argc, argv, "Aadfo:rwt:uv")) != -1) 120 switch (ch) { 121 case 'A': 122 all = forceall = 1; 123 break; 124 case 'a': 125 all = 1; 126 break; 127 case 'd': 128 debug = 1; 129 break; 130 case 'f': 131 init_flags |= MNT_FORCE; 132 break; 133 case 'o': 134 if (*optarg) 135 catopt(&options, optarg); 136 break; 137 case 'r': 138 init_flags |= MNT_RDONLY; 139 break; 140 case 't': 141 if (vfslist != NULL) 142 errx(EXIT_FAILURE, 143 "Only one -t option may be specified."); 144 vfslist = makevfslist(optarg); 145 vfstype = optarg; 146 break; 147 case 'u': 148 init_flags |= MNT_UPDATE; 149 break; 150 case 'v': 151 verbose++; 152 break; 153 case 'w': 154 init_flags &= ~MNT_RDONLY; 155 break; 156 case '?': 157 default: 158 usage(); 159 /* NOTREACHED */ 160 } 161 argc -= optind; 162 argv += optind; 163 164 #define BADTYPE(type) \ 165 (strcmp(type, FSTAB_RO) && \ 166 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 167 168 rval = 0; 169 switch (argc) { 170 case 0: 171 if (all) 172 while ((fs = getfsent()) != NULL) { 173 if (BADTYPE(fs->fs_type)) 174 continue; 175 if (checkvfsname(fs->fs_vfstype, vfslist)) 176 continue; 177 if (hasopt(fs->fs_mntops, "noauto")) 178 continue; 179 if (strcmp(fs->fs_spec, "from_mount") == 0) { 180 if ((mntbuf = getmntpt(fs->fs_file)) 181 == NULL) 182 errx(EXIT_FAILURE, 183 "Unknown file system %s", 184 fs->fs_file); 185 mntfromname = mntbuf->f_mntfromname; 186 } else 187 mntfromname = fs->fs_spec; 188 mntfromname = getfsspecname(buf, sizeof(buf), 189 mntfromname); 190 if (mntfromname == NULL) 191 err(EXIT_FAILURE, "%s", buf); 192 if (mountfs(fs->fs_vfstype, mntfromname, 193 fs->fs_file, init_flags, options, 194 fs->fs_mntops, !forceall, NULL, 0)) 195 rval = 1; 196 } 197 else { 198 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 199 err(EXIT_FAILURE, "getmntinfo"); 200 for (i = 0; i < mntsize; i++) { 201 if (checkvfsname(mntbuf[i].f_fstypename, 202 vfslist)) 203 continue; 204 prmount(&mntbuf[i]); 205 } 206 } 207 exit(rval); 208 /* NOTREACHED */ 209 case 1: 210 if (vfslist != NULL) { 211 usage(); 212 /* NOTREACHED */ 213 } 214 215 /* 216 * Create a canonical version of the device or mount path 217 * passed to us. It's ok for this to fail. It's also ok 218 * for the result to be exactly the same as the original. 219 */ 220 canonical_path = realpath(*argv, canonical_path_buf); 221 222 if (init_flags & MNT_UPDATE) { 223 /* 224 * Try looking up the canonical path first, 225 * then try exactly what the user entered. 226 */ 227 if ((canonical_path == NULL || 228 (mntbuf = getmntpt(canonical_path)) == NULL) && 229 (mntbuf = getmntpt(*argv)) == NULL) { 230 out: 231 errx(EXIT_FAILURE, 232 "Unknown special file or file system `%s'", 233 *argv); 234 } 235 mntfromname = mntbuf->f_mntfromname; 236 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 237 if (strcmp(fs->fs_spec, "from_mount") != 0) 238 mntfromname = fs->fs_spec; 239 /* ignore the fstab file options. */ 240 fs->fs_mntops = NULL; 241 } 242 mntonname = mntbuf->f_mntonname; 243 fstypename = mntbuf->f_fstypename; 244 mountopts = NULL; 245 } else { 246 /* 247 * Try looking up the canonical path first, 248 * then try exactly what the user entered. 249 */ 250 if (canonical_path == NULL || 251 ((fs = getfsfile(canonical_path)) == NULL && 252 (fs = getfsspec(canonical_path)) == NULL)) 253 { 254 if ((fs = getfsfile(*argv)) == NULL && 255 (fs = getfsspec(*argv)) == NULL) { 256 goto out; 257 } 258 } 259 if (BADTYPE(fs->fs_type)) 260 errx(EXIT_FAILURE, 261 "Unknown file system type for `%s'", 262 *argv); 263 if (strcmp(fs->fs_spec, "from_mount") == 0) { 264 if ((canonical_path == NULL || 265 (mntbuf = getmntpt(canonical_path)) 266 == NULL) && 267 (mntbuf = getmntpt(*argv)) == NULL) 268 goto out; 269 mntfromname = mntbuf->f_mntfromname; 270 } else 271 mntfromname = fs->fs_spec; 272 mntonname = fs->fs_file; 273 fstypename = fs->fs_vfstype; 274 mountopts = fs->fs_mntops; 275 } 276 mntfromname = getfsspecname(buf, sizeof(buf), mntfromname); 277 if (mntfromname == NULL) 278 err(EXIT_FAILURE, "%s", buf); 279 rval = mountfs(fstypename, mntfromname, 280 mntonname, init_flags, options, mountopts, 0, NULL, 0); 281 break; 282 case 2: 283 /* 284 * If -t flag has not been specified, and spec contains either 285 * a ':' or a '@' then assume that an NFS filesystem is being 286 * specified ala Sun. 287 */ 288 mntfromname = getfsspecname(buf, sizeof(buf), argv[0]); 289 if (mntfromname == NULL) 290 err(EXIT_FAILURE, "%s", buf); 291 if (vfslist == NULL) { 292 if (strpbrk(argv[0], ":@") != NULL) { 293 fprintf(stderr, "WARNING: autoselecting nfs " 294 "based on : or @ in the device name is " 295 "deprecated!\n" 296 "WARNING: This behaviour will be removed " 297 "in a future release\n"); 298 vfstype = "nfs"; 299 } else { 300 vfstype = getfslab(mntfromname); 301 if (vfstype == NULL) 302 vfstype = ffs_fstype; 303 } 304 } 305 rval = mountfs(vfstype, mntfromname, argv[1], init_flags, 306 options, NULL, 0, NULL, 0); 307 break; 308 default: 309 usage(); 310 } 311 312 #if 0 /* disabled because it interferes the service. */ 313 /* 314 * If the mount was successfully, and done by root, tell mountd the 315 * good news. Pid checks are probably unnecessary, but don't hurt. 316 */ 317 if (rval == 0 && getuid() == 0 && 318 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 319 int pid; 320 321 if (fscanf(mountdfp, "%d", &pid) == 1 && 322 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 323 err(EXIT_FAILURE, "signal mountd"); 324 (void)fclose(mountdfp); 325 } 326 #endif 327 328 exit(rval); 329 /* NOTREACHED */ 330 } 331 332 int 333 hasopt(const char *mntopts, const char *option) 334 { 335 int negative, found; 336 char *opt, *optbuf; 337 338 if (option[0] == 'n' && option[1] == 'o') { 339 negative = 1; 340 option += 2; 341 } else 342 negative = 0; 343 optbuf = estrdup(mntopts); 344 found = 0; 345 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 346 if (opt[0] == 'n' && opt[1] == 'o') { 347 if (!strcasecmp(opt + 2, option)) 348 found = negative; 349 } else if (!strcasecmp(opt, option)) 350 found = !negative; 351 } 352 free(optbuf); 353 return (found); 354 } 355 356 static int 357 mountfs(const char *vfstype, const char *spec, const char *name, 358 int flags, const char *options, const char *mntopts, 359 int skipmounted, char *buf, size_t buflen) 360 { 361 /* List of directories containing mount_xxx subcommands. */ 362 static const char *edirs[] = { 363 #ifdef RESCUEDIR 364 RESCUEDIR, 365 #endif 366 _PATH_SBIN, 367 _PATH_USRSBIN, 368 NULL 369 }; 370 const char ** volatile argv, **edir; 371 struct statvfs *sfp, sf; 372 pid_t pid; 373 int pfd[2]; 374 int argc, numfs, i, status, maxargc; 375 char *optbuf, execname[MAXPATHLEN + 1], execbase[MAXPATHLEN], 376 mntpath[MAXPATHLEN]; 377 volatile int getargs; 378 379 if (realpath(name, mntpath) == NULL) { 380 warn("realpath `%s'", name); 381 return (1); 382 } 383 384 name = mntpath; 385 386 optbuf = NULL; 387 if (mntopts) 388 catopt(&optbuf, mntopts); 389 390 if (options) { 391 catopt(&optbuf, options); 392 getargs = strstr(options, "getargs") != NULL; 393 } else 394 getargs = 0; 395 396 if (!mntopts && !options) 397 catopt(&optbuf, "rw"); 398 399 if (getargs == 0 && strcmp(name, "/") == 0 && !hasopt(optbuf, "union")) 400 flags |= MNT_UPDATE; 401 else if (skipmounted) { 402 if ((numfs = getmntinfo(&sfp, MNT_WAIT)) == 0) { 403 warn("getmntinfo"); 404 return (1); 405 } 406 for(i = 0; i < numfs; i++) { 407 const char *mountedtype = sfp[i].f_fstypename; 408 size_t cmplen = sizeof(sfp[i].f_fstypename); 409 410 /* remove "puffs|" from comparisons, if present */ 411 #define TYPESIZE (sizeof(PUFFS_TYPEPREFIX)-1) 412 if (strncmp(mountedtype, 413 PUFFS_TYPEPREFIX, TYPESIZE) == 0) { 414 mountedtype += TYPESIZE; 415 cmplen -= TYPESIZE; 416 } 417 418 /* 419 * XXX can't check f_mntfromname, 420 * thanks to mfs, union, etc. 421 */ 422 if (strncmp(name, sfp[i].f_mntonname, MNAMELEN) == 0 && 423 strncmp(vfstype, mountedtype, cmplen) == 0) { 424 if (verbose) 425 (void)printf("%s on %s type %.*s: " 426 "%s\n", 427 sfp[i].f_mntfromname, 428 sfp[i].f_mntonname, 429 (int)sizeof(sfp[i].f_fstypename), 430 sfp[i].f_fstypename, 431 "already mounted"); 432 return (0); 433 } 434 } 435 } 436 if (flags & MNT_FORCE) 437 catopt(&optbuf, "force"); 438 if (flags & MNT_RDONLY) 439 catopt(&optbuf, "ro"); 440 441 if (flags & MNT_UPDATE) { 442 catopt(&optbuf, "update"); 443 /* Figure out the fstype only if we defaulted to ffs */ 444 if (vfstype == ffs_fstype && statvfs(name, &sf) != -1) 445 vfstype = sf.f_fstypename; 446 } 447 448 maxargc = 64; 449 argv = ecalloc(maxargc, sizeof(*argv)); 450 451 if (getargs && 452 strncmp(vfstype, PUFFS_TYPEPREFIX, sizeof(PUFFS_TYPEPREFIX)-1) == 0) 453 (void)snprintf(execbase, sizeof(execbase), "mount_puffs"); 454 else if (hasopt(optbuf, "rump")) 455 (void)snprintf(execbase, sizeof(execbase), "rump_%s", vfstype); 456 else 457 (void)snprintf(execbase, sizeof(execbase), "mount_%s", vfstype); 458 argc = 0; 459 argv[argc++] = execbase; 460 if (optbuf) 461 mangle(optbuf, &argc, &argv, &maxargc); 462 argv[argc++] = spec; 463 argv[argc++] = name; 464 argv[argc] = NULL; 465 466 if ((verbose && buf == NULL) || debug) { 467 (void)printf("exec:"); 468 for (i = 0; i < argc; i++) 469 (void)printf(" %s", argv[i]); 470 (void)printf("\n"); 471 } 472 473 if (buf) { 474 if (pipe(pfd) == -1) 475 warn("Cannot create pipe"); 476 } 477 478 switch (pid = vfork()) { 479 case -1: /* Error. */ 480 warn("vfork"); 481 if (optbuf) 482 free(optbuf); 483 free(argv); 484 return (1); 485 486 case 0: /* Child. */ 487 if (debug) 488 _exit(0); 489 490 if (buf) { 491 (void)close(pfd[0]); 492 (void)close(STDOUT_FILENO); 493 if (dup2(pfd[1], STDOUT_FILENO) == -1) 494 warn("Cannot open fd to mount program"); 495 } 496 497 /* Go find an executable. */ 498 edir = edirs; 499 do { 500 (void)snprintf(execname, 501 sizeof(execname), "%s/%s", *edir, execbase); 502 (void)execv(execname, __UNCONST(argv)); 503 if (errno != ENOENT) 504 warn("exec %s for %s", execname, name); 505 } while (*++edir != NULL); 506 507 if (errno == ENOENT) 508 warnx("%s not found for %s", execbase, name); 509 _exit(1); 510 /* NOTREACHED */ 511 512 default: /* Parent. */ 513 if (optbuf) 514 free(optbuf); 515 free(argv); 516 517 if (buf || getargs) { 518 char tbuf[1024], *ptr; 519 int nread; 520 521 if (buf == NULL) { 522 ptr = tbuf; 523 buflen = sizeof(tbuf) - 1; 524 } else { 525 ptr = buf; 526 buflen--; 527 } 528 (void)close(pfd[1]); 529 (void)signal(SIGPIPE, SIG_IGN); 530 while ((nread = read(pfd[0], ptr, buflen)) > 0) { 531 buflen -= nread; 532 ptr += nread; 533 } 534 *ptr = '\0'; 535 if (buflen == 0) { 536 while (read(pfd[0], &nread, sizeof(nread)) > 0) 537 continue; 538 } 539 if (buf == NULL) 540 (void)fprintf(stdout, "%s", tbuf); 541 } 542 543 if (waitpid(pid, &status, 0) == -1) { 544 warn("waitpid"); 545 return (1); 546 } 547 548 if (WIFEXITED(status)) { 549 if (WEXITSTATUS(status) != 0) 550 return (WEXITSTATUS(status)); 551 } else if (WIFSIGNALED(status)) { 552 warnx("%s: %s", name, strsignal(WTERMSIG(status))); 553 return (1); 554 } 555 556 if (buf == NULL) { 557 if (verbose) { 558 if (statvfs(name, &sf) == -1) { 559 warn("statvfs %s", name); 560 return (1); 561 } 562 prmount(&sf); 563 } 564 } 565 break; 566 } 567 568 return (0); 569 } 570 571 static void 572 prmount(struct statvfs *sfp) 573 { 574 int flags; 575 const struct opt *o; 576 struct passwd *pw; 577 int f; 578 579 (void)printf("%s on %s type %.*s", sfp->f_mntfromname, 580 sfp->f_mntonname, (int)sizeof(sfp->f_fstypename), 581 sfp->f_fstypename); 582 583 flags = sfp->f_flag & MNT_VISFLAGMASK; 584 for (f = 0, o = optnames; flags && o < 585 &optnames[sizeof(optnames)/sizeof(optnames[0])]; o++) 586 if (flags & o->o_opt) { 587 if (!o->o_silent || verbose) 588 (void)printf("%s%s", !f++ ? " (" : ", ", 589 o->o_name); 590 flags &= ~o->o_opt; 591 } 592 if (flags) 593 (void)printf("%sunknown flag%s %#x", !f++ ? " (" : ", ", 594 flags & (flags - 1) ? "s" : "", flags); 595 if (sfp->f_owner) { 596 (void)printf("%smounted by ", !f++ ? " (" : ", "); 597 if ((pw = getpwuid(sfp->f_owner)) != NULL) 598 (void)printf("%s", pw->pw_name); 599 else 600 (void)printf("%d", sfp->f_owner); 601 } 602 if (verbose) 603 (void)printf("%sfsid: 0x%x/0x%x", 604 !f++ ? " (" /* ) */: ", ", 605 sfp->f_fsidx.__fsid_val[0], sfp->f_fsidx.__fsid_val[1]); 606 607 if (verbose) { 608 (void)printf("%s", !f++ ? " (" : ", "); 609 (void)printf("reads: sync %" PRIu64 " async %" PRIu64 "", 610 sfp->f_syncreads, sfp->f_asyncreads); 611 (void)printf(", writes: sync %" PRIu64 " async %" PRIu64 "", 612 sfp->f_syncwrites, sfp->f_asyncwrites); 613 if (verbose > 1) { 614 char buf[2048]; 615 616 if (getmntargs(sfp, buf, sizeof(buf))) 617 printf(", [%s: %s]", sfp->f_fstypename, buf); 618 } 619 printf(")\n"); 620 } else 621 (void)printf("%s", f ? ")\n" : "\n"); 622 } 623 624 static int 625 getmntargs(struct statvfs *sfs, char *buf, size_t buflen) 626 { 627 628 if (mountfs(sfs->f_fstypename, sfs->f_mntfromname, sfs->f_mntonname, 0, 629 "getargs", NULL, 0, buf, buflen)) 630 return (0); 631 else { 632 if (*buf == '\0') 633 return (0); 634 if ((buf = strchr(buf, '\n')) != NULL) 635 *buf = '\0'; 636 return (1); 637 } 638 } 639 640 static struct statvfs * 641 getmntpt(const char *name) 642 { 643 struct statvfs *mntbuf; 644 int i, mntsize; 645 646 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 647 for (i = 0; i < mntsize; i++) 648 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 649 strcmp(mntbuf[i].f_mntonname, name) == 0) 650 return (&mntbuf[i]); 651 return (NULL); 652 } 653 654 static void 655 catopt(char **sp, const char *o) 656 { 657 char *s, *n; 658 659 s = *sp; 660 if (s) { 661 easprintf(&n, "%s,%s", s, o); 662 free(s); 663 s = n; 664 } else 665 s = estrdup(o); 666 *sp = s; 667 } 668 669 static void 670 mangle(char *options, int *argcp, const char ** volatile *argvp, int *maxargcp) 671 { 672 char *p, *s; 673 int argc, maxargc; 674 const char **argv, **nargv; 675 676 argc = *argcp; 677 argv = *argvp; 678 maxargc = *maxargcp; 679 680 for (s = options; (p = strsep(&s, ",")) != NULL;) { 681 /* Always leave space for one more argument and the NULL. */ 682 if (argc >= maxargc - 4) { 683 nargv = erealloc(argv, (maxargc << 1) * sizeof(nargv)); 684 argv = nargv; 685 maxargc <<= 1; 686 } 687 if (*p != '\0') { 688 if (*p == '-') { 689 argv[argc++] = p; 690 p = strchr(p, '='); 691 if (p) { 692 *p = '\0'; 693 argv[argc++] = p+1; 694 } 695 } else if (strcmp(p, "rw") != 0) { 696 argv[argc++] = "-o"; 697 argv[argc++] = p; 698 } 699 } 700 } 701 702 *argcp = argc; 703 *argvp = argv; 704 *maxargcp = maxargc; 705 } 706 707 /* Deduce the filesystem type from the disk label. */ 708 static const char * 709 getfslab(const char *str) 710 { 711 static struct dkwedge_info dkw; 712 struct disklabel dl; 713 int fd; 714 int part; 715 const char *vfstype; 716 u_char fstype; 717 char buf[MAXPATHLEN + 1]; 718 char *sp, *ep; 719 720 if ((fd = open(str, O_RDONLY)) == -1) { 721 /* 722 * Iff we get EBUSY try the raw device. Since mount always uses 723 * the block device we know we are never passed a raw device. 724 */ 725 if (errno != EBUSY) 726 err(EXIT_FAILURE, "cannot open `%s'", str); 727 strlcpy(buf, str, MAXPATHLEN); 728 if ((sp = strrchr(buf, '/')) != NULL) 729 ++sp; 730 else 731 sp = buf; 732 for (ep = sp + strlen(sp) + 1; ep > sp; ep--) 733 *ep = *(ep - 1); 734 *sp = 'r'; 735 736 /* Silently fail here - mount call can display error */ 737 if ((fd = open(buf, O_RDONLY)) == -1) 738 return (NULL); 739 } 740 741 /* Check to see if this is a wedge. */ 742 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == 0) { 743 /* Yup, this is easy. */ 744 (void) close(fd); 745 return (dkw.dkw_ptype); 746 } 747 748 if (ioctl(fd, DIOCGDINFO, &dl) == -1) { 749 (void) close(fd); 750 return (NULL); 751 } 752 753 (void) close(fd); 754 755 part = str[strlen(str) - 1] - 'a'; 756 757 if (part < 0 || part >= dl.d_npartitions) 758 return (NULL); 759 760 /* Return NULL for unknown types - caller can fall back to ffs */ 761 if ((fstype = dl.d_partitions[part].p_fstype) >= FSMAXMOUNTNAMES) 762 vfstype = NULL; 763 else 764 vfstype = mountnames[fstype]; 765 766 return (vfstype); 767 } 768 769 static void 770 usage(void) 771 { 772 773 (void)fprintf(stderr, "Usage: %s [-Aadfruvw] [-t type]\n" 774 "\t%s [-dfruvw] special | node\n" 775 "\t%s [-dfruvw] [-o options] [-t type] special node\n", 776 getprogname(), getprogname(), getprogname()); 777 exit(1); 778 } 779
Indexes created Tue Sep 30 17:09:57 GMT 2025