1 /* $NetBSD: mount.c,v 1.92 2011/01/13 11:57:02 pooka 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 1.92 2011/01/13 11:57:02 pooka 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 62 #define MOUNTNAMES 63 #include <fcntl.h> 64 #include <sys/disk.h> 65 #include <sys/disklabel.h> 66 #include <sys/ioctl.h> 67 68 #include "pathnames.h" 69 #include "mountprog.h" 70 71 static int debug, verbose; 72 73 static void catopt(char **, const char *); 74 static const char * 75 getfslab(const char *str); 76 static struct statvfs * 77 getmntpt(const char *); 78 static int getmntargs(struct statvfs *, char *, size_t); 79 static int hasopt(const char *, const char *); 80 static void mangle(char *, int *, const char ** volatile *, int *); 81 static int mountfs(const char *, const char *, const char *, 82 int, const char *, const char *, int, char *, size_t); 83 static void prmount(struct statvfs *); 84 static void usage(void); 85 86 87 /* Map from mount otions to printable formats. */ 88 static const struct opt { 89 int o_opt; 90 int o_silent; 91 const char *o_name; 92 } optnames[] = { 93 __MNT_FLAGS 94 }; 95 96 static char ffs_fstype[] = "ffs"; 97 98 int 99 main(int argc, char *argv[]) 100 { 101 const char *mntfromname, *mntonname, **vfslist, *vfstype; 102 struct fstab *fs; 103 struct statvfs *mntbuf; 104 #if 0 105 FILE *mountdfp; 106 #endif 107 int all, ch, forceall, i, init_flags, mntsize, rval; 108 char *options; 109 const char *mountopts, *fstypename; 110 char canonical_path_buf[MAXPATHLEN]; 111 char *canonical_path; 112 113 /* started as "mount" */ 114 all = forceall = init_flags = 0; 115 options = NULL; 116 vfslist = NULL; 117 vfstype = ffs_fstype; 118 while ((ch = getopt(argc, argv, "Aadfo:rwt:uv")) != -1) 119 switch (ch) { 120 case 'A': 121 all = forceall = 1; 122 break; 123 case 'a': 124 all = 1; 125 break; 126 case 'd': 127 debug = 1; 128 break; 129 case 'f': 130 init_flags |= MNT_FORCE; 131 break; 132 case 'o': 133 if (*optarg) 134 catopt(&options, optarg); 135 break; 136 case 'r': 137 init_flags |= MNT_RDONLY; 138 break; 139 case 't': 140 if (vfslist != NULL) 141 errx(1, 142 "only one -t option may be specified."); 143 vfslist = makevfslist(optarg); 144 vfstype = optarg; 145 break; 146 case 'u': 147 init_flags |= MNT_UPDATE; 148 break; 149 case 'v': 150 verbose++; 151 break; 152 case 'w': 153 init_flags &= ~MNT_RDONLY; 154 break; 155 case '?': 156 default: 157 usage(); 158 /* NOTREACHED */ 159 } 160 argc -= optind; 161 argv += optind; 162 163 #define BADTYPE(type) \ 164 (strcmp(type, FSTAB_RO) && \ 165 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 166 167 rval = 0; 168 switch (argc) { 169 case 0: 170 if (all) 171 while ((fs = getfsent()) != NULL) { 172 if (BADTYPE(fs->fs_type)) 173 continue; 174 if (checkvfsname(fs->fs_vfstype, vfslist)) 175 continue; 176 if (hasopt(fs->fs_mntops, "noauto")) 177 continue; 178 if (strcmp(fs->fs_spec, "from_mount") == 0) { 179 if ((mntbuf = getmntpt(fs->fs_file)) == NULL) 180 errx(1, 181 "unknown file system %s.", 182 fs->fs_file); 183 mntfromname = mntbuf->f_mntfromname; 184 } else 185 mntfromname = fs->fs_spec; 186 if (mountfs(fs->fs_vfstype, mntfromname, 187 fs->fs_file, init_flags, options, 188 fs->fs_mntops, !forceall, NULL, 0)) 189 rval = 1; 190 } 191 else { 192 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 193 err(1, "getmntinfo"); 194 for (i = 0; i < mntsize; i++) { 195 if (checkvfsname(mntbuf[i].f_fstypename, 196 vfslist)) 197 continue; 198 prmount(&mntbuf[i]); 199 } 200 } 201 exit(rval); 202 /* NOTREACHED */ 203 case 1: 204 if (vfslist != NULL) { 205 usage(); 206 /* NOTREACHED */ 207 } 208 209 /* 210 * Create a canonical version of the device or mount path 211 * passed to us. It's ok for this to fail. It's also ok 212 * for the result to be exactly the same as the original. 213 */ 214 canonical_path = realpath(*argv, canonical_path_buf); 215 216 if (init_flags & MNT_UPDATE) { 217 /* 218 * Try looking up the canonical path first, 219 * then try exactly what the user entered. 220 */ 221 if ((canonical_path == NULL || 222 (mntbuf = getmntpt(canonical_path)) == NULL) && 223 (mntbuf = getmntpt(*argv)) == NULL 224 ) 225 { 226 errx(1, 227 "unknown special file or file system %s.", 228 *argv); 229 } 230 mntfromname = mntbuf->f_mntfromname; 231 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 232 if (strcmp(fs->fs_spec, "from_mount") != 0) 233 mntfromname = fs->fs_spec; 234 /* ignore the fstab file options. */ 235 fs->fs_mntops = NULL; 236 } 237 mntonname = mntbuf->f_mntonname; 238 fstypename = mntbuf->f_fstypename; 239 mountopts = NULL; 240 } else { 241 /* 242 * Try looking up the canonical path first, 243 * then try exactly what the user entered. 244 */ 245 if (canonical_path == NULL || 246 ((fs = getfsfile(canonical_path)) == NULL && 247 (fs = getfsspec(canonical_path)) == NULL)) 248 { 249 if ((fs = getfsfile(*argv)) == NULL && 250 (fs = getfsspec(*argv)) == NULL) 251 { 252 errx(1, 253 "%s: unknown special file or file system.", 254 *argv); 255 } 256 } 257 if (BADTYPE(fs->fs_type)) 258 errx(1, "%s has unknown file system type.", 259 *argv); 260 if (strcmp(fs->fs_spec, "from_mount") == 0) { 261 if ((canonical_path == NULL || 262 (mntbuf = getmntpt(canonical_path)) == NULL) && 263 (mntbuf = getmntpt(*argv)) == NULL 264 ) 265 { 266 errx(1, 267 "unknown special file or file system %s.", 268 *argv); 269 } 270 mntfromname = mntbuf->f_mntfromname; 271 } else 272 mntfromname = fs->fs_spec; 273 mntonname = fs->fs_file; 274 fstypename = fs->fs_vfstype; 275 mountopts = fs->fs_mntops; 276 } 277 rval = mountfs(fstypename, mntfromname, 278 mntonname, init_flags, options, mountopts, 0, NULL, 0); 279 break; 280 case 2: 281 /* 282 * If -t flag has not been specified, and spec contains either 283 * a ':' or a '@' then assume that an NFS filesystem is being 284 * specified ala Sun. 285 */ 286 if (vfslist == NULL) { 287 if (strpbrk(argv[0], ":@") != NULL) { 288 fprintf(stderr, "WARNING: autoselecting nfs " 289 "based on : or @ in the device name is " 290 "deprecated!\n" 291 "WARNING: This behaviour will be removed " 292 "in a future release\n"); 293 vfstype = "nfs"; 294 } else { 295 vfstype = getfslab(argv[0]); 296 if (vfstype == NULL) 297 vfstype = ffs_fstype; 298 } 299 } 300 rval = mountfs(vfstype, 301 argv[0], argv[1], init_flags, options, NULL, 0, NULL, 0); 302 break; 303 default: 304 usage(); 305 /* NOTREACHED */ 306 } 307 308 #if 0 /* disabled because it interferes the service. */ 309 /* 310 * If the mount was successfully, and done by root, tell mountd the 311 * good news. Pid checks are probably unnecessary, but don't hurt. 312 */ 313 if (rval == 0 && getuid() == 0 && 314 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 315 int pid; 316 317 if (fscanf(mountdfp, "%d", &pid) == 1 && 318 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 319 err(1, "signal mountd"); 320 (void)fclose(mountdfp); 321 } 322 #endif 323 324 exit(rval); 325 /* NOTREACHED */ 326 } 327 328 int 329 hasopt(const char *mntopts, const char *option) 330 { 331 int negative, found; 332 char *opt, *optbuf; 333 334 if (option[0] == 'n' && option[1] == 'o') { 335 negative = 1; 336 option += 2; 337 } else 338 negative = 0; 339 optbuf = strdup(mntopts); 340 found = 0; 341 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 342 if (opt[0] == 'n' && opt[1] == 'o') { 343 if (!strcasecmp(opt + 2, option)) 344 found = negative; 345 } else if (!strcasecmp(opt, option)) 346 found = !negative; 347 } 348 free(optbuf); 349 return (found); 350 } 351 352 static int 353 mountfs(const char *vfstype, const char *spec, const char *name, 354 int flags, const char *options, const char *mntopts, 355 int skipmounted, char *buf, size_t buflen) 356 { 357 /* List of directories containing mount_xxx subcommands. */ 358 static const char *edirs[] = { 359 #ifdef RESCUEDIR 360 RESCUEDIR, 361 #endif 362 _PATH_SBIN, 363 _PATH_USRSBIN, 364 NULL 365 }; 366 const char ** volatile argv, **edir; 367 struct statvfs *sfp, sf; 368 pid_t pid; 369 int pfd[2]; 370 int argc, numfs, i, status, maxargc; 371 char *optbuf, execname[MAXPATHLEN + 1], execbase[MAXPATHLEN], 372 mntpath[MAXPATHLEN]; 373 volatile int getargs; 374 375 if (realpath(name, mntpath) == NULL) { 376 warn("realpath %s", name); 377 return (1); 378 } 379 380 name = mntpath; 381 382 optbuf = NULL; 383 if (mntopts) 384 catopt(&optbuf, mntopts); 385 386 if (options) { 387 catopt(&optbuf, options); 388 getargs = strstr(options, "getargs") != NULL; 389 } else 390 getargs = 0; 391 392 if (!mntopts && !options) 393 catopt(&optbuf, "rw"); 394 395 if (getargs == 0 && strcmp(name, "/") == 0 && !hasopt(optbuf, "union")) 396 flags |= MNT_UPDATE; 397 else if (skipmounted) { 398 if ((numfs = getmntinfo(&sfp, MNT_WAIT)) == 0) { 399 warn("getmntinfo"); 400 return (1); 401 } 402 for(i = 0; i < numfs; i++) { 403 const char *mountedtype = sfp[i].f_fstypename; 404 size_t cmplen = sizeof(sfp[i].f_fstypename); 405 406 /* remove "puffs|" from comparisons, if present */ 407 #define TYPESIZE (sizeof(PUFFS_TYPEPREFIX)-1) 408 if (strncmp(mountedtype, 409 PUFFS_TYPEPREFIX, TYPESIZE) == 0) { 410 mountedtype += TYPESIZE; 411 cmplen -= TYPESIZE; 412 } 413 414 /* 415 * XXX can't check f_mntfromname, 416 * thanks to mfs, union, etc. 417 */ 418 if (strncmp(name, sfp[i].f_mntonname, MNAMELEN) == 0 && 419 strncmp(vfstype, mountedtype, cmplen) == 0) { 420 if (verbose) 421 (void)printf("%s on %s type %.*s: " 422 "%s\n", 423 sfp[i].f_mntfromname, 424 sfp[i].f_mntonname, 425 (int)sizeof(sfp[i].f_fstypename), 426 sfp[i].f_fstypename, 427 "already mounted"); 428 return (0); 429 } 430 } 431 } 432 if (flags & MNT_FORCE) 433 catopt(&optbuf, "force"); 434 if (flags & MNT_RDONLY) 435 catopt(&optbuf, "ro"); 436 437 if (flags & MNT_UPDATE) { 438 catopt(&optbuf, "update"); 439 /* Figure out the fstype only if we defaulted to ffs */ 440 if (vfstype == ffs_fstype && statvfs(name, &sf) != -1) 441 vfstype = sf.f_fstypename; 442 } 443 444 maxargc = 64; 445 argv = malloc(sizeof(char *) * maxargc); 446 if (argv == NULL) 447 err(1, "malloc"); 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 = vfork()) { 477 case -1: /* Error. */ 478 warn("vfork"); 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 warnx("%s not found for %s", execbase, name); 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) < 0) { 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) < 0) { 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 if (asprintf(&n, "%s,%s", s, o) < 0) 660 err(1, "asprintf"); 661 free(s); 662 s = n; 663 } else 664 s = strdup(o); 665 *sp = s; 666 } 667 668 static void 669 mangle(char *options, int *argcp, const char ** volatile *argvp, int *maxargcp) 670 { 671 char *p, *s; 672 int argc, maxargc; 673 const char **argv, **nargv; 674 675 argc = *argcp; 676 argv = *argvp; 677 maxargc = *maxargcp; 678 679 for (s = options; (p = strsep(&s, ",")) != NULL;) { 680 /* Always leave space for one more argument and the NULL. */ 681 if (argc >= maxargc - 4) { 682 nargv = realloc(argv, (maxargc << 1) * sizeof(char *)); 683 if (!nargv) 684 err(1, "realloc"); 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 if (strcmp(p, "rw") != 0) { 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(1, "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 (void) close(fd); 746 return (dkw.dkw_ptype); 747 } 748 749 if (ioctl(fd, DIOCGDINFO, &dl) == -1) { 750 (void) close(fd); 751 return (NULL); 752 } 753 754 (void) close(fd); 755 756 part = str[strlen(str) - 1] - 'a'; 757 758 if (part < 0 || part >= dl.d_npartitions) 759 return (NULL); 760 761 /* Return NULL for unknown types - caller can fall back to ffs */ 762 if ((fstype = dl.d_partitions[part].p_fstype) >= FSMAXMOUNTNAMES) 763 vfstype = NULL; 764 else 765 vfstype = mountnames[fstype]; 766 767 return (vfstype); 768 } 769 770 static void 771 usage(void) 772 { 773 774 (void)fprintf(stderr, 775 "usage: mount %s\n mount %s\n mount %s\n", 776 "[-Aadfruvw] [-t type]", 777 "[-dfruvw] special | node", 778 "[-dfruvw] [-o options] [-t type] special node"); 779 exit(1); 780 /* NOTREACHED */ 781 } 782