mount.c revision 1.100.2.1
1 /* $NetBSD: mount.c,v 1.100.2.1 2016/11/04 14:48:55 pgoyette 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 1.100.2.1 2016/11/04 14:48:55 pgoyette 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 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 return rval; 208 case 1: 209 if (vfslist != NULL) { 210 usage(); 211 /* NOTREACHED */ 212 } 213 214 /* 215 * Create a canonical version of the device or mount path 216 * passed to us. It's ok for this to fail. It's also ok 217 * for the result to be exactly the same as the original. 218 */ 219 canonical_path = realpath(*argv, canonical_path_buf); 220 221 if (init_flags & MNT_UPDATE) { 222 /* 223 * Try looking up the canonical path first, 224 * then try exactly what the user entered. 225 */ 226 if ((canonical_path == NULL || 227 (mntbuf = getmntpt(canonical_path)) == NULL) && 228 (mntbuf = getmntpt(*argv)) == NULL) { 229 out: 230 errx(EXIT_FAILURE, 231 "Unknown special file or file system `%s'", 232 *argv); 233 } 234 mntfromname = mntbuf->f_mntfromname; 235 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 236 if (strcmp(fs->fs_spec, "from_mount") != 0) 237 mntfromname = fs->fs_spec; 238 /* ignore the fstab file options. */ 239 fs->fs_mntops = NULL; 240 } 241 mntonname = mntbuf->f_mntonname; 242 fstypename = mntbuf->f_fstypename; 243 mountopts = NULL; 244 } else { 245 /* 246 * Try looking up the canonical path first, 247 * then try exactly what the user entered. 248 */ 249 if (canonical_path == NULL || 250 ((fs = getfsfile(canonical_path)) == NULL && 251 (fs = getfsspec(canonical_path)) == NULL)) 252 { 253 if ((fs = getfsfile(*argv)) == NULL && 254 (fs = getfsspec(*argv)) == NULL) { 255 goto out; 256 } 257 } 258 if (BADTYPE(fs->fs_type)) 259 errx(EXIT_FAILURE, 260 "Unknown file system type for `%s'", 261 *argv); 262 if (strcmp(fs->fs_spec, "from_mount") == 0) { 263 if ((canonical_path == NULL || 264 (mntbuf = getmntpt(canonical_path)) 265 == NULL) && 266 (mntbuf = getmntpt(*argv)) == NULL) 267 goto out; 268 mntfromname = mntbuf->f_mntfromname; 269 } else 270 mntfromname = fs->fs_spec; 271 mntonname = fs->fs_file; 272 fstypename = fs->fs_vfstype; 273 mountopts = fs->fs_mntops; 274 } 275 mntfromname = getfsspecname(buf, sizeof(buf), mntfromname); 276 if (mntfromname == NULL) 277 err(EXIT_FAILURE, "%s", buf); 278 rval = mountfs(fstypename, mntfromname, 279 mntonname, init_flags, options, mountopts, 0, NULL, 0); 280 break; 281 case 2: 282 /* 283 * If -t flag has not been specified, and spec contains either 284 * a ':' or a '@' then assume that an NFS filesystem is being 285 * specified ala Sun. 286 */ 287 mntfromname = getfsspecname(buf, sizeof(buf), argv[0]); 288 if (mntfromname == NULL) 289 err(EXIT_FAILURE, "%s", buf); 290 if (vfslist == NULL) { 291 if (strpbrk(argv[0], ":@") != NULL) { 292 fprintf(stderr, "WARNING: autoselecting nfs " 293 "based on : or @ in the device name is " 294 "deprecated!\n" 295 "WARNING: This behaviour will be removed " 296 "in a future release\n"); 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 |= MNT_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 & MNT_FORCE) 435 catopt(&optbuf, "force"); 436 if (flags & MNT_RDONLY) 437 catopt(&optbuf, "ro"); 438 439 if (flags & MNT_UPDATE) { 440 catopt(&optbuf, "update"); 441 /* Figure out the fstype only if we defaulted to ffs */ 442 if (vfstype == ffs_fstype && statvfs(name, &sf) != -1) 443 vfstype = sf.f_fstypename; 444 } 445 446 maxargc = 64; 447 argv = ecalloc(maxargc, sizeof(*argv)); 448 449 if (getargs && 450 strncmp(vfstype, PUFFS_TYPEPREFIX, sizeof(PUFFS_TYPEPREFIX)-1) == 0) 451 (void)snprintf(execbase, sizeof(execbase), "mount_puffs"); 452 else if (hasopt(optbuf, "rump")) 453 (void)snprintf(execbase, sizeof(execbase), "rump_%s", vfstype); 454 else 455 (void)snprintf(execbase, sizeof(execbase), "mount_%s", vfstype); 456 argc = 0; 457 argv[argc++] = execbase; 458 if (optbuf) 459 mangle(optbuf, &argc, &argv, &maxargc); 460 argv[argc++] = spec; 461 argv[argc++] = name; 462 argv[argc] = NULL; 463 464 if ((verbose && buf == NULL) || debug) { 465 (void)printf("exec:"); 466 for (i = 0; i < argc; i++) 467 (void)printf(" %s", argv[i]); 468 (void)printf("\n"); 469 } 470 471 if (buf) { 472 if (pipe(pfd) == -1) 473 warn("Cannot create pipe"); 474 } 475 476 switch (pid = fork()) { 477 case -1: /* Error. */ 478 warn("fork"); 479 if (optbuf) 480 free(optbuf); 481 free(argv); 482 return (1); 483 484 case 0: /* Child. */ 485 if (debug) 486 _exit(0); 487 488 if (buf) { 489 (void)close(pfd[0]); 490 (void)close(STDOUT_FILENO); 491 if (dup2(pfd[1], STDOUT_FILENO) == -1) 492 warn("Cannot open fd to mount program"); 493 } 494 495 /* Go find an executable. */ 496 edir = edirs; 497 do { 498 (void)snprintf(execname, 499 sizeof(execname), "%s/%s", *edir, execbase); 500 (void)execv(execname, __UNCONST(argv)); 501 if (errno != ENOENT) 502 warn("exec %s for %s", execname, name); 503 } while (*++edir != NULL); 504 505 if (errno == ENOENT) 506 warn("exec %s for %s: %s", execbase, name, execbase); 507 _exit(1); 508 /* NOTREACHED */ 509 510 default: /* Parent. */ 511 if (optbuf) 512 free(optbuf); 513 free(argv); 514 515 if (buf || getargs) { 516 char tbuf[1024], *ptr; 517 int nread; 518 519 if (buf == NULL) { 520 ptr = tbuf; 521 buflen = sizeof(tbuf) - 1; 522 } else { 523 ptr = buf; 524 buflen--; 525 } 526 (void)close(pfd[1]); 527 (void)signal(SIGPIPE, SIG_IGN); 528 while ((nread = read(pfd[0], ptr, buflen)) > 0) { 529 buflen -= nread; 530 ptr += nread; 531 } 532 *ptr = '\0'; 533 if (buflen == 0) { 534 while (read(pfd[0], &nread, sizeof(nread)) > 0) 535 continue; 536 } 537 if (buf == NULL) 538 (void)fprintf(stdout, "%s", tbuf); 539 } 540 541 if (waitpid(pid, &status, 0) == -1) { 542 warn("waitpid"); 543 return (1); 544 } 545 546 if (WIFEXITED(status)) { 547 if (WEXITSTATUS(status) != 0) 548 return (WEXITSTATUS(status)); 549 } else if (WIFSIGNALED(status)) { 550 warnx("%s: %s", name, strsignal(WTERMSIG(status))); 551 return (1); 552 } 553 554 if (buf == NULL) { 555 if (verbose) { 556 if (statvfs(name, &sf) == -1) { 557 warn("statvfs %s", name); 558 return (1); 559 } 560 prmount(&sf); 561 } 562 } 563 break; 564 } 565 566 return (0); 567 } 568 569 static void 570 prmount(struct statvfs *sfp) 571 { 572 int flags; 573 const struct opt *o; 574 struct passwd *pw; 575 int f; 576 577 (void)printf("%s on %s type %.*s", sfp->f_mntfromname, 578 sfp->f_mntonname, (int)sizeof(sfp->f_fstypename), 579 sfp->f_fstypename); 580 581 flags = sfp->f_flag & MNT_VISFLAGMASK; 582 for (f = 0, o = optnames; flags && o < 583 &optnames[sizeof(optnames)/sizeof(optnames[0])]; o++) 584 if (flags & o->o_opt) { 585 if (!o->o_silent || verbose) 586 (void)printf("%s%s", !f++ ? " (" : ", ", 587 o->o_name); 588 flags &= ~o->o_opt; 589 } 590 if (flags) 591 (void)printf("%sunknown flag%s %#x", !f++ ? " (" : ", ", 592 flags & (flags - 1) ? "s" : "", flags); 593 if (sfp->f_owner) { 594 (void)printf("%smounted by ", !f++ ? " (" : ", "); 595 if ((pw = getpwuid(sfp->f_owner)) != NULL) 596 (void)printf("%s", pw->pw_name); 597 else 598 (void)printf("%d", sfp->f_owner); 599 } 600 if (verbose) 601 (void)printf("%sfsid: 0x%x/0x%x", 602 !f++ ? " (" /* ) */: ", ", 603 sfp->f_fsidx.__fsid_val[0], sfp->f_fsidx.__fsid_val[1]); 604 605 if (verbose) { 606 (void)printf("%s", !f++ ? " (" : ", "); 607 (void)printf("reads: sync %" PRIu64 " async %" PRIu64 "", 608 sfp->f_syncreads, sfp->f_asyncreads); 609 (void)printf(", writes: sync %" PRIu64 " async %" PRIu64 "", 610 sfp->f_syncwrites, sfp->f_asyncwrites); 611 if (verbose > 1) { 612 char buf[2048]; 613 614 if (getmntargs(sfp, buf, sizeof(buf))) 615 printf(", [%s: %s]", sfp->f_fstypename, buf); 616 } 617 printf(")\n"); 618 } else 619 (void)printf("%s", f ? ")\n" : "\n"); 620 } 621 622 static int 623 getmntargs(struct statvfs *sfs, char *buf, size_t buflen) 624 { 625 626 if (mountfs(sfs->f_fstypename, sfs->f_mntfromname, sfs->f_mntonname, 0, 627 "getargs", NULL, 0, buf, buflen)) 628 return (0); 629 else { 630 if (*buf == '\0') 631 return (0); 632 if ((buf = strchr(buf, '\n')) != NULL) 633 *buf = '\0'; 634 return (1); 635 } 636 } 637 638 static struct statvfs * 639 getmntpt(const char *name) 640 { 641 struct statvfs *mntbuf; 642 int i, mntsize; 643 644 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 645 for (i = 0; i < mntsize; i++) 646 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 647 strcmp(mntbuf[i].f_mntonname, name) == 0) 648 return (&mntbuf[i]); 649 return (NULL); 650 } 651 652 static void 653 catopt(char **sp, const char *o) 654 { 655 char *s, *n; 656 657 s = *sp; 658 if (s) { 659 easprintf(&n, "%s,%s", s, o); 660 free(s); 661 s = n; 662 } else 663 s = estrdup(o); 664 *sp = s; 665 } 666 667 static void 668 mangle(char *options, int *argcp, const char ** volatile *argvp, int *maxargcp) 669 { 670 char *p, *s; 671 int argc, maxargc; 672 const char **argv, **nargv; 673 674 argc = *argcp; 675 argv = *argvp; 676 maxargc = *maxargcp; 677 678 for (s = options; (p = strsep(&s, ",")) != NULL;) { 679 /* Always leave space for one more argument and the NULL. */ 680 if (argc >= maxargc - 4) { 681 nargv = erealloc(argv, (maxargc << 1) * sizeof(nargv)); 682 argv = nargv; 683 maxargc <<= 1; 684 } 685 if (*p != '\0') { 686 if (*p == '-') { 687 argv[argc++] = p; 688 p = strchr(p, '='); 689 if (p) { 690 *p = '\0'; 691 argv[argc++] = p+1; 692 } 693 } else if (strcmp(p, "rw") != 0) { 694 argv[argc++] = "-o"; 695 argv[argc++] = p; 696 } 697 } 698 } 699 700 *argcp = argc; 701 *argvp = argv; 702 *maxargcp = maxargc; 703 } 704 705 /* Deduce the filesystem type from the disk label. */ 706 static const char * 707 getfslab(const char *str) 708 { 709 static struct dkwedge_info dkw; 710 struct disklabel dl; 711 int fd; 712 int part; 713 const char *vfstype; 714 u_char fstype; 715 char buf[MAXPATHLEN + 1]; 716 char *sp, *ep; 717 718 if ((fd = open(str, O_RDONLY)) == -1) { 719 /* 720 * Iff we get EBUSY try the raw device. Since mount always uses 721 * the block device we know we are never passed a raw device. 722 */ 723 if (errno != EBUSY) 724 err(EXIT_FAILURE, "cannot open `%s'", str); 725 strlcpy(buf, str, MAXPATHLEN); 726 if ((sp = strrchr(buf, '/')) != NULL) 727 ++sp; 728 else 729 sp = buf; 730 for (ep = sp + strlen(sp) + 1; ep > sp; ep--) 731 *ep = *(ep - 1); 732 *sp = 'r'; 733 734 /* Silently fail here - mount call can display error */ 735 if ((fd = open(buf, O_RDONLY)) == -1) 736 return (NULL); 737 } 738 739 /* Check to see if this is a wedge. */ 740 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == 0) { 741 /* Yup, this is easy. */ 742 (void) close(fd); 743 return (dkw.dkw_ptype); 744 } 745 746 if (ioctl(fd, DIOCGDINFO, &dl) == -1) { 747 (void) close(fd); 748 return (NULL); 749 } 750 751 (void) close(fd); 752 753 part = str[strlen(str) - 1] - 'a'; 754 755 if (part < 0 || part >= dl.d_npartitions) 756 return (NULL); 757 758 /* Return NULL for unknown types - caller can fall back to ffs */ 759 if ((fstype = dl.d_partitions[part].p_fstype) >= FSMAXMOUNTNAMES) 760 vfstype = NULL; 761 else 762 vfstype = mountnames[fstype]; 763 764 return (vfstype); 765 } 766 767 static void 768 usage(void) 769 { 770 771 (void)fprintf(stderr, "Usage: %s [-Aadfruvw] [-t type]\n" 772 "\t%s [-dfruvw] special | node\n" 773 "\t%s [-dfruvw] [-o options] [-t type] special node\n", 774 getprogname(), getprogname(), getprogname()); 775 exit(1); 776 } 777
Indexes created Sat Oct 18 17:09:52 GMT 2025