mount.c revision 1.107
1 /* $NetBSD: mount.c,v 1.107 2021/12/07 14:31:13 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 1.107 2021/12/07 14:31:13 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 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 rval = 0; 174 switch (argc) { 175 case 0: 176 if (all) { 177 while ((fs = getfsent()) != NULL) { 178 if (BADTYPE(fs->fs_type)) 179 continue; 180 if (checkvfsname(fs->fs_vfstype, vfslist)) 181 continue; 182 if (hasopt(fs->fs_mntops, "noauto")) 183 continue; 184 if (strcmp(fs->fs_spec, "from_mount") == 0) { 185 if ((mntbuf = getmntpt(fs->fs_file)) 186 == NULL) 187 errx(EXIT_FAILURE, 188 "Unknown file system %s", 189 fs->fs_file); 190 mntfromname = mntbuf->f_mntfromname; 191 } else 192 mntfromname = fs->fs_spec; 193 mntfromname = getfsspecname(buf, sizeof(buf), 194 mntfromname); 195 if (mntfromname == NULL) 196 err(EXIT_FAILURE, "%s", buf); 197 if (mountfs(fs->fs_vfstype, mntfromname, 198 fs->fs_file, init_flags, options, 199 fs->fs_mntops, !forceall, NULL, 0)) 200 rval = 1; 201 } 202 } else { 203 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 204 err(EXIT_FAILURE, "getmntinfo"); 205 for (i = 0; i < mntsize; i++) { 206 if (checkvfsname(mntbuf[i].f_fstypename, 207 vfslist)) 208 continue; 209 prmount(&mntbuf[i]); 210 } 211 } 212 return rval; 213 case 1: 214 if (vfslist != NULL) { 215 usage(); 216 /* NOTREACHED */ 217 } 218 219 /* 220 * Create a canonical version of the device or mount path 221 * passed to us. It's ok for this to fail. It's also ok 222 * for the result to be exactly the same as the original. 223 */ 224 canonical_path = realpath(*argv, canonical_path_buf); 225 226 if (init_flags & FLG_UPDATE) { 227 /* 228 * Try looking up the canonical path first, 229 * then try exactly what the user entered. 230 */ 231 if ((canonical_path == NULL || 232 (mntbuf = getmntpt(canonical_path)) == NULL) && 233 (mntbuf = getmntpt(*argv)) == NULL) { 234 out: 235 errx(EXIT_FAILURE, 236 "Unknown special file or file system `%s'", 237 *argv); 238 } 239 mntfromname = mntbuf->f_mntfromname; 240 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 241 if (strcmp(fs->fs_spec, "from_mount") != 0) 242 mntfromname = fs->fs_spec; 243 /* ignore the fstab file options. */ 244 fs->fs_mntops = NULL; 245 } 246 mntonname = mntbuf->f_mntonname; 247 fstypename = mntbuf->f_fstypename; 248 mountopts = NULL; 249 } else { 250 /* 251 * Try looking up the canonical path first, 252 * then try exactly what the user entered. 253 */ 254 if (canonical_path == NULL || 255 ((fs = getfsfile(canonical_path)) == NULL && 256 (fs = getfsspec(canonical_path)) == NULL)) 257 { 258 if ((fs = getfsfile(*argv)) == NULL && 259 (fs = getfsspec(*argv)) == NULL) { 260 goto out; 261 } 262 } 263 if (BADTYPE(fs->fs_type)) 264 errx(EXIT_FAILURE, 265 "Unknown file system type for `%s'", 266 *argv); 267 if (strcmp(fs->fs_spec, "from_mount") == 0) { 268 if ((canonical_path == NULL || 269 (mntbuf = getmntpt(canonical_path)) 270 == NULL) && 271 (mntbuf = getmntpt(*argv)) == NULL) 272 goto out; 273 mntfromname = mntbuf->f_mntfromname; 274 } else 275 mntfromname = fs->fs_spec; 276 mntonname = fs->fs_file; 277 fstypename = fs->fs_vfstype; 278 mountopts = fs->fs_mntops; 279 } 280 mntfromname = getfsspecname(buf, sizeof(buf), mntfromname); 281 if (mntfromname == NULL) 282 err(EXIT_FAILURE, "%s", buf); 283 rval = mountfs(fstypename, mntfromname, 284 mntonname, init_flags, options, mountopts, 0, NULL, 0); 285 break; 286 case 2: 287 /* 288 * If -t flag has not been specified, and spec contains either 289 * a ':' or a '@' then assume that an NFS filesystem is being 290 * specified ala Sun. 291 */ 292 mntfromname = getfsspecname(buf, sizeof(buf), argv[0]); 293 if (mntfromname == NULL) 294 err(EXIT_FAILURE, "%s", buf); 295 if (vfslist == NULL) { 296 if (strpbrk(argv[0], ":@") != NULL) { 297 vfstype = "nfs"; 298 } else { 299 vfstype = getfslab(mntfromname); 300 if (vfstype == NULL) 301 vfstype = ffs_fstype; 302 } 303 } 304 rval = mountfs(vfstype, mntfromname, argv[1], init_flags, 305 options, NULL, 0, NULL, 0); 306 break; 307 default: 308 usage(); 309 } 310 311 #if 0 /* disabled because it interferes the service. */ 312 /* 313 * If the mount was successfully, and done by root, tell mountd the 314 * good news. Pid checks are probably unnecessary, but don't hurt. 315 */ 316 if (rval == 0 && getuid() == 0 && 317 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 318 int pid; 319 320 if (fscanf(mountdfp, "%d", &pid) == 1 && 321 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 322 err(EXIT_FAILURE, "signal mountd"); 323 (void)fclose(mountdfp); 324 } 325 #endif 326 327 return rval; 328 } 329 330 int 331 hasopt(const char *mntopts, const char *option) 332 { 333 int negative, found; 334 char *opt, *optbuf; 335 336 if (option[0] == 'n' && option[1] == 'o') { 337 negative = 1; 338 option += 2; 339 } else 340 negative = 0; 341 optbuf = estrdup(mntopts); 342 found = 0; 343 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 344 if (opt[0] == 'n' && opt[1] == 'o') { 345 if (!strcasecmp(opt + 2, option)) 346 found = negative; 347 } else if (!strcasecmp(opt, option)) 348 found = !negative; 349 } 350 free(optbuf); 351 return found; 352 } 353 354 static int 355 mountfs(const char *vfstype, const char *spec, const char *name, 356 int flags, const char *options, const char *mntopts, 357 int skipmounted, char *buf, size_t buflen) 358 { 359 /* List of directories containing mount_xxx subcommands. */ 360 static const char *edirs[] = { 361 #ifdef RESCUEDIR 362 RESCUEDIR, 363 #endif 364 _PATH_SBIN, 365 _PATH_USRSBIN, 366 NULL 367 }; 368 const char ** volatile argv, **edir; 369 struct statvfs *sfp, sf; 370 pid_t pid; 371 int pfd[2]; 372 int argc, numfs, i, status, maxargc; 373 char *optbuf, execname[MAXPATHLEN + 1], execbase[MAXPATHLEN], 374 mntpath[MAXPATHLEN]; 375 volatile int getargs; 376 377 if (realpath(name, mntpath) == NULL) { 378 warn("realpath `%s'", name); 379 return 1; 380 } 381 382 name = mntpath; 383 384 optbuf = NULL; 385 if (mntopts) 386 catopt(&optbuf, mntopts); 387 388 if (options) { 389 catopt(&optbuf, options); 390 getargs = strstr(options, "getargs") != NULL; 391 } else 392 getargs = 0; 393 394 if (!mntopts && !options) 395 catopt(&optbuf, "rw"); 396 397 if (getargs == 0 && strcmp(name, "/") == 0 && !hasopt(optbuf, "union")) 398 flags |= FLG_UPDATE; 399 else if (skipmounted) { 400 if ((numfs = getmntinfo(&sfp, MNT_WAIT)) == 0) { 401 warn("getmntinfo"); 402 return 1; 403 } 404 for(i = 0; i < numfs; i++) { 405 const char *mountedtype = sfp[i].f_fstypename; 406 size_t cmplen = sizeof(sfp[i].f_fstypename); 407 408 /* remove "puffs|" from comparisons, if present */ 409 #define TYPESIZE (sizeof(PUFFS_TYPEPREFIX)-1) 410 if (strncmp(mountedtype, 411 PUFFS_TYPEPREFIX, TYPESIZE) == 0) { 412 mountedtype += TYPESIZE; 413 cmplen -= TYPESIZE; 414 } 415 416 /* 417 * XXX can't check f_mntfromname, 418 * thanks to mfs, union, etc. 419 */ 420 if (strncmp(name, sfp[i].f_mntonname, MNAMELEN) == 0 && 421 strncmp(vfstype, mountedtype, cmplen) == 0) { 422 if (verbose) 423 (void)printf("%s on %s type %.*s: " 424 "%s\n", 425 sfp[i].f_mntfromname, 426 sfp[i].f_mntonname, 427 (int)sizeof(sfp[i].f_fstypename), 428 sfp[i].f_fstypename, 429 "already mounted"); 430 return 0; 431 } 432 } 433 } 434 if (flags & FLG_FORCE) 435 catopt(&optbuf, "force"); 436 if (flags & FLG_RDONLY) 437 catopt(&optbuf, "ro"); 438 /* make -w override -r */ 439 if (flags & FLG_RDWRITE) 440 catopt(&optbuf, "rw"); 441 442 if (flags & FLG_UPDATE) { 443 catopt(&optbuf, "update"); 444 /* Figure out the fstype only if we defaulted to ffs */ 445 if (vfstype == ffs_fstype && statvfs(name, &sf) != -1) 446 vfstype = sf.f_fstypename; 447 } 448 449 maxargc = 64; 450 argv = ecalloc(maxargc, sizeof(*argv)); 451 452 if (getargs && 453 strncmp(vfstype, PUFFS_TYPEPREFIX, sizeof(PUFFS_TYPEPREFIX)-1) == 0) 454 (void)snprintf(execbase, sizeof(execbase), "mount_puffs"); 455 else if (hasopt(optbuf, "rump")) 456 (void)snprintf(execbase, sizeof(execbase), "rump_%s", vfstype); 457 else 458 (void)snprintf(execbase, sizeof(execbase), "mount_%s", vfstype); 459 argc = 0; 460 argv[argc++] = execbase; 461 if (optbuf) 462 mangle(optbuf, &argc, &argv, &maxargc); 463 argv[argc++] = spec; 464 argv[argc++] = name; 465 argv[argc] = NULL; 466 467 if ((verbose && buf == NULL) || debug) { 468 (void)printf("exec:"); 469 for (i = 0; i < argc; i++) 470 (void)printf(" %s", argv[i]); 471 (void)printf("\n"); 472 } 473 474 if (buf) { 475 if (pipe(pfd) == -1) 476 warn("Cannot create pipe"); 477 } 478 479 switch (pid = fork()) { 480 case -1: /* Error. */ 481 warn("fork"); 482 if (optbuf) 483 free(optbuf); 484 free(argv); 485 return 1; 486 487 case 0: /* Child. */ 488 if (debug) 489 _exit(0); 490 491 if (buf) { 492 (void)close(pfd[0]); 493 (void)close(STDOUT_FILENO); 494 if (dup2(pfd[1], STDOUT_FILENO) == -1) 495 warn("Cannot open fd to mount program"); 496 } 497 498 /* Go find an executable. */ 499 edir = edirs; 500 do { 501 (void)snprintf(execname, 502 sizeof(execname), "%s/%s", *edir, execbase); 503 (void)execv(execname, __UNCONST(argv)); 504 if (errno != ENOENT) 505 warn("exec %s for %s", execname, name); 506 } while (*++edir != NULL); 507 508 if (errno == ENOENT) 509 warn("exec %s for %s: %s", execbase, name, execbase); 510 _exit(1); 511 /* NOTREACHED */ 512 513 default: /* Parent. */ 514 if (optbuf) 515 free(optbuf); 516 free(argv); 517 518 if (buf || getargs) { 519 char tbuf[1024], *ptr; 520 int nread; 521 522 if (buf == NULL) { 523 ptr = tbuf; 524 buflen = sizeof(tbuf) - 1; 525 } else { 526 ptr = buf; 527 buflen--; 528 } 529 (void)close(pfd[1]); 530 (void)signal(SIGPIPE, SIG_IGN); 531 while ((nread = read(pfd[0], ptr, buflen)) > 0) { 532 buflen -= nread; 533 ptr += nread; 534 } 535 *ptr = '\0'; 536 if (buflen == 0) { 537 while (read(pfd[0], &nread, sizeof(nread)) > 0) 538 continue; 539 } 540 if (buf == NULL) 541 (void)fprintf(stdout, "%s", tbuf); 542 } 543 544 if (waitpid(pid, &status, 0) == -1) { 545 warn("waitpid"); 546 return 1; 547 } 548 549 if (WIFEXITED(status)) { 550 if (WEXITSTATUS(status) != 0) 551 return WEXITSTATUS(status); 552 } else if (WIFSIGNALED(status)) { 553 warnx("%s: %s", name, strsignal(WTERMSIG(status))); 554 return 1; 555 } 556 557 if (buf == NULL) { 558 if (verbose) { 559 if (statvfs(name, &sf) == -1) { 560 warn("statvfs %s", name); 561 return 1; 562 } 563 prmount(&sf); 564 } 565 } 566 break; 567 } 568 569 return 0; 570 } 571 572 static void 573 prmount(struct statvfs *sfp) 574 { 575 int flags; 576 const struct opt *o; 577 struct passwd *pw; 578 int f; 579 580 (void)printf("%s on %s type %.*s", sfp->f_mntfromname, 581 sfp->f_mntonname, (int)sizeof(sfp->f_fstypename), 582 sfp->f_fstypename); 583 584 flags = sfp->f_flag & MNT_VISFLAGMASK; 585 for (f = 0, o = optnames; flags && o < 586 &optnames[sizeof(optnames)/sizeof(optnames[0])]; o++) 587 if (flags & o->o_opt) { 588 if (!o->o_silent || verbose) 589 (void)printf("%s%s", !f++ ? " (" : ", ", 590 o->o_name); 591 flags &= ~o->o_opt; 592 } 593 if (flags) 594 (void)printf("%sunknown flag%s %#x", !f++ ? " (" : ", ", 595 flags & (flags - 1) ? "s" : "", flags); 596 if (sfp->f_owner) { 597 (void)printf("%smounted by ", !f++ ? " (" : ", "); 598 if ((pw = getpwuid(sfp->f_owner)) != NULL) 599 (void)printf("%s", pw->pw_name); 600 else 601 (void)printf("%d", sfp->f_owner); 602 } 603 if (verbose) 604 (void)printf("%sfsid: 0x%x/0x%x", 605 !f++ ? " (" /* ) */: ", ", 606 sfp->f_fsidx.__fsid_val[0], sfp->f_fsidx.__fsid_val[1]); 607 608 if (verbose) { 609 (void)printf("%s", !f++ ? " (" : ", "); 610 (void)printf("reads: sync %" PRIu64 " async %" PRIu64 "", 611 sfp->f_syncreads, sfp->f_asyncreads); 612 (void)printf(", writes: sync %" PRIu64 " async %" PRIu64 "", 613 sfp->f_syncwrites, sfp->f_asyncwrites); 614 if (verbose > 1) { 615 char buf[2048]; 616 617 if (getmntargs(sfp, buf, sizeof(buf))) 618 printf(", [%s: %s]", sfp->f_fstypename, buf); 619 } 620 printf(")\n"); 621 } else 622 (void)printf("%s", f ? ")\n" : "\n"); 623 } 624 625 static int 626 getmntargs(struct statvfs *sfs, char *buf, size_t buflen) 627 { 628 629 if (mountfs(sfs->f_fstypename, sfs->f_mntfromname, sfs->f_mntonname, 0, 630 "getargs", NULL, 0, buf, buflen)) 631 return 0; 632 else { 633 if (*buf == '\0') 634 return 0; 635 if ((buf = strchr(buf, '\n')) != NULL) 636 *buf = '\0'; 637 return 1; 638 } 639 } 640 641 static struct statvfs * 642 getmntpt(const char *name) 643 { 644 struct statvfs *mntbuf; 645 int i, mntsize; 646 647 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 648 for (i = 0; i < mntsize; i++) 649 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 650 strcmp(mntbuf[i].f_mntonname, name) == 0) 651 return &mntbuf[i]; 652 return NULL; 653 } 654 655 static void 656 catopt(char **sp, const char *o) 657 { 658 char *s, *n; 659 660 s = *sp; 661 if (s) { 662 easprintf(&n, "%s,%s", s, o); 663 free(s); 664 s = n; 665 } else 666 s = estrdup(o); 667 *sp = s; 668 } 669 670 static void 671 mangle(char *options, int *argcp, const char ** volatile *argvp, int *maxargcp) 672 { 673 char *p, *s; 674 int argc, maxargc; 675 const char **argv, **nargv; 676 677 argc = *argcp; 678 argv = *argvp; 679 maxargc = *maxargcp; 680 681 for (s = options; (p = strsep(&s, ",")) != NULL;) { 682 /* Always leave space for one more argument and the NULL. */ 683 if (argc >= maxargc - 4) { 684 nargv = erealloc(argv, (maxargc << 1) * sizeof(nargv)); 685 argv = nargv; 686 maxargc <<= 1; 687 } 688 if (*p != '\0') { 689 if (*p == '-') { 690 argv[argc++] = p; 691 p = strchr(p, '='); 692 if (p) { 693 *p = '\0'; 694 argv[argc++] = p+1; 695 } 696 } else { 697 argv[argc++] = "-o"; 698 argv[argc++] = p; 699 } 700 } 701 } 702 703 *argcp = argc; 704 *argvp = argv; 705 *maxargcp = maxargc; 706 } 707 708 /* Deduce the filesystem type from the disk label. */ 709 static const char * 710 getfslab(const char *str) 711 { 712 static struct dkwedge_info dkw; 713 struct disklabel dl; 714 int fd; 715 int part; 716 const char *vfstype; 717 u_char fstype; 718 char buf[MAXPATHLEN + 1]; 719 char *sp, *ep; 720 721 if ((fd = open(str, O_RDONLY)) == -1) { 722 /* 723 * Iff we get EBUSY try the raw device. Since mount always uses 724 * the block device we know we are never passed a raw device. 725 */ 726 if (errno != EBUSY) 727 err(EXIT_FAILURE, "cannot open `%s'", str); 728 strlcpy(buf, str, MAXPATHLEN); 729 if ((sp = strrchr(buf, '/')) != NULL) 730 ++sp; 731 else 732 sp = buf; 733 for (ep = sp + strlen(sp) + 1; ep > sp; ep--) 734 *ep = *(ep - 1); 735 *sp = 'r'; 736 737 /* Silently fail here - mount call can display error */ 738 if ((fd = open(buf, O_RDONLY)) == -1) 739 return NULL; 740 } 741 742 /* Check to see if this is a wedge. */ 743 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == 0) { 744 /* Yup, this is easy. */ 745 close(fd); 746 if (*dkw.dkw_ptype) 747 return dkw.dkw_ptype; 748 return NULL; 749 } 750 751 if (ioctl(fd, DIOCGDINFO, &dl) == -1) { 752 (void) close(fd); 753 return NULL; 754 } 755 756 (void) close(fd); 757 758 part = str[strlen(str) - 1] - 'a'; 759 760 if (part < 0 || part >= dl.d_npartitions) 761 return NULL; 762 763 /* Return NULL for unknown types - caller can fall back to ffs */ 764 if ((fstype = dl.d_partitions[part].p_fstype) >= FSMAXMOUNTNAMES) 765 vfstype = NULL; 766 else 767 vfstype = mountnames[fstype]; 768 769 return vfstype; 770 } 771 772 static void 773 usage(void) 774 { 775 776 (void)fprintf(stderr, "Usage: %s [-Aadfruvw] [-t type]\n" 777 "\t%s [-dfruvw] special | node\n" 778 "\t%s [-dfruvw] [-o options] [-t type] special node\n", 779 getprogname(), getprogname(), getprogname()); 780 exit(1); 781 } 782
Indexes created Thu Sep 25 15:09:46 GMT 2025