1 /*- 2 * Copyright (c) 1980, 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #if 0 35 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 36 #endif 37 #endif /* not lint */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/stat.h> 45 #include <sys/wait.h> 46 47 #include <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <fstab.h> 51 #include <paths.h> 52 #include <pwd.h> 53 #include <signal.h> 54 #include <stdint.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 #include <libutil.h> 60 61 #include "extern.h" 62 #include "mntopts.h" 63 #include "pathnames.h" 64 65 /* `meta' options */ 66 #define MOUNT_META_OPTION_FSTAB "fstab" 67 #define MOUNT_META_OPTION_CURRENT "current" 68 69 static int debug, fstab_style, verbose; 70 71 struct cpa { 72 char **a; 73 ssize_t sz; 74 int c; 75 }; 76 77 char *catopt(char *, const char *); 78 struct statfs *getmntpt(const char *); 79 int hasopt(const char *, const char *); 80 int ismounted(struct fstab *, struct statfs *, int); 81 int isremountable(const char *); 82 void mangle(char *, struct cpa *); 83 char *update_options(char *, char *, int); 84 int mountfs(const char *, const char *, const char *, 85 int, const char *, const char *); 86 void remopt(char *, const char *); 87 void prmount(struct statfs *); 88 void putfsent(struct statfs *); 89 void usage(void); 90 char *flags2opts(int); 91 92 /* Map from mount options to printable formats. */ 93 static struct opt { 94 uint64_t o_opt; 95 const char *o_name; 96 } optnames[] = { 97 { MNT_ASYNC, "asynchronous" }, 98 { MNT_EXPORTED, "NFS exported" }, 99 { MNT_LOCAL, "local" }, 100 { MNT_NOATIME, "noatime" }, 101 { MNT_NOEXEC, "noexec" }, 102 { MNT_NOSUID, "nosuid" }, 103 { MNT_NOSYMFOLLOW, "nosymfollow" }, 104 { MNT_QUOTA, "with quotas" }, 105 { MNT_RDONLY, "read-only" }, 106 { MNT_SYNCHRONOUS, "synchronous" }, 107 { MNT_UNION, "union" }, 108 { MNT_NOCLUSTERR, "noclusterr" }, 109 { MNT_NOCLUSTERW, "noclusterw" }, 110 { MNT_SUIDDIR, "suiddir" }, 111 { MNT_SOFTDEP, "soft-updates" }, 112 { MNT_SUJ, "journaled soft-updates" }, 113 { MNT_MULTILABEL, "multilabel" }, 114 { MNT_ACLS, "acls" }, 115 { MNT_NFS4ACLS, "nfsv4acls" }, 116 { MNT_GJOURNAL, "gjournal" }, 117 { MNT_AUTOMOUNTED, "automounted" }, 118 { MNT_VERIFIED, "verified" }, 119 { 0, NULL } 120 }; 121 122 /* 123 * List of VFS types that can be remounted without becoming mounted on top 124 * of each other. 125 * XXX Is this list correct? 126 */ 127 static const char * 128 remountable_fs_names[] = { 129 "ufs", "ffs", "ext2fs", 130 0 131 }; 132 133 static const char userquotaeq[] = "userquota="; 134 static const char groupquotaeq[] = "groupquota="; 135 136 static char *mountprog = NULL; 137 138 static int 139 use_mountprog(const char *vfstype) 140 { 141 /* XXX: We need to get away from implementing external mount 142 * programs for every filesystem, and move towards having 143 * each filesystem properly implement the nmount() system call. 144 */ 145 unsigned int i; 146 const char *fs[] = { 147 "cd9660", "mfs", "msdosfs", "nfs", 148 "nullfs", "smbfs", "udf", "unionfs", 149 NULL 150 }; 151 152 if (mountprog != NULL) 153 return (1); 154 155 for (i = 0; fs[i] != NULL; ++i) { 156 if (strcmp(vfstype, fs[i]) == 0) 157 return (1); 158 } 159 160 return (0); 161 } 162 163 static int 164 exec_mountprog(const char *name, const char *execname, char *const argv[]) 165 { 166 pid_t pid; 167 int status; 168 169 switch (pid = fork()) { 170 case -1: /* Error. */ 171 warn("fork"); 172 exit (1); 173 case 0: /* Child. */ 174 /* Go find an executable. */ 175 execvP(execname, _PATH_SYSPATH, argv); 176 if (errno == ENOENT) { 177 warn("exec %s not found", execname); 178 if (execname[0] != '/') { 179 warnx("in path: %s", _PATH_SYSPATH); 180 } 181 } 182 exit(1); 183 default: /* Parent. */ 184 if (waitpid(pid, &status, 0) < 0) { 185 warn("waitpid"); 186 return (1); 187 } 188 189 if (WIFEXITED(status)) { 190 if (WEXITSTATUS(status) != 0) 191 return (WEXITSTATUS(status)); 192 } else if (WIFSIGNALED(status)) { 193 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 194 return (1); 195 } 196 break; 197 } 198 199 return (0); 200 } 201 202 static int 203 specified_ro(const char *arg) 204 { 205 char *optbuf, *opt; 206 int ret = 0; 207 208 optbuf = strdup(arg); 209 if (optbuf == NULL) 210 err(1, NULL); 211 212 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 213 if (strcmp(opt, "ro") == 0) { 214 ret = 1; 215 break; 216 } 217 } 218 free(optbuf); 219 return (ret); 220 } 221 222 static void 223 restart_mountd(void) 224 { 225 struct pidfh *pfh; 226 pid_t mountdpid; 227 228 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 229 if (pfh != NULL) { 230 /* Mountd is not running. */ 231 pidfile_remove(pfh); 232 return; 233 } 234 if (errno != EEXIST) { 235 /* Cannot open pidfile for some reason. */ 236 return; 237 } 238 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 239 if (kill(mountdpid, SIGHUP) == -1) 240 err(1, "signal mountd"); 241 } 242 243 int 244 main(int argc, char *argv[]) 245 { 246 const char *mntfromname, **vfslist, *vfstype; 247 struct fstab *fs; 248 struct statfs *mntbuf; 249 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro; 250 int onlylate; 251 char *cp, *ep, *options; 252 253 all = init_flags = late = onlylate = 0; 254 ro = 0; 255 options = NULL; 256 vfslist = NULL; 257 vfstype = "ufs"; 258 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1) 259 switch (ch) { 260 case 'a': 261 all = 1; 262 break; 263 case 'd': 264 debug = 1; 265 break; 266 case 'F': 267 setfstab(optarg); 268 break; 269 case 'f': 270 init_flags |= MNT_FORCE; 271 break; 272 case 'L': 273 onlylate = 1; 274 late = 1; 275 break; 276 case 'l': 277 late = 1; 278 break; 279 case 'n': 280 /* For compatibility with the Linux version of mount. */ 281 break; 282 case 'o': 283 if (*optarg) { 284 options = catopt(options, optarg); 285 if (specified_ro(optarg)) 286 ro = 1; 287 } 288 break; 289 case 'p': 290 fstab_style = 1; 291 verbose = 1; 292 break; 293 case 'r': 294 options = catopt(options, "ro"); 295 ro = 1; 296 break; 297 case 't': 298 if (vfslist != NULL) 299 errx(1, "only one -t option may be specified"); 300 vfslist = makevfslist(optarg); 301 vfstype = optarg; 302 break; 303 case 'u': 304 init_flags |= MNT_UPDATE; 305 break; 306 case 'v': 307 verbose = 1; 308 break; 309 case 'w': 310 options = catopt(options, "noro"); 311 break; 312 case '?': 313 default: 314 usage(); 315 /* NOTREACHED */ 316 } 317 argc -= optind; 318 argv += optind; 319 320 #define BADTYPE(type) \ 321 (strcmp(type, FSTAB_RO) && \ 322 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 323 324 if ((init_flags & MNT_UPDATE) && (ro == 0)) 325 options = catopt(options, "noro"); 326 327 rval = 0; 328 switch (argc) { 329 case 0: 330 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 331 err(1, "getmntinfo"); 332 if (all) { 333 while ((fs = getfsent()) != NULL) { 334 if (BADTYPE(fs->fs_type)) 335 continue; 336 if (checkvfsname(fs->fs_vfstype, vfslist)) 337 continue; 338 if (hasopt(fs->fs_mntops, "noauto")) 339 continue; 340 if (!hasopt(fs->fs_mntops, "late") && onlylate) 341 continue; 342 if (hasopt(fs->fs_mntops, "late") && !late) 343 continue; 344 if (hasopt(fs->fs_mntops, "failok")) 345 failok = 1; 346 else 347 failok = 0; 348 if (!(init_flags & MNT_UPDATE) && 349 ismounted(fs, mntbuf, mntsize)) 350 continue; 351 options = update_options(options, fs->fs_mntops, 352 mntbuf->f_flags); 353 if (mountfs(fs->fs_vfstype, fs->fs_spec, 354 fs->fs_file, init_flags, options, 355 fs->fs_mntops) && !failok) 356 rval = 1; 357 } 358 } else if (fstab_style) { 359 for (i = 0; i < mntsize; i++) { 360 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 361 continue; 362 putfsent(&mntbuf[i]); 363 } 364 } else { 365 for (i = 0; i < mntsize; i++) { 366 if (checkvfsname(mntbuf[i].f_fstypename, 367 vfslist)) 368 continue; 369 if (!verbose && 370 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 371 continue; 372 prmount(&mntbuf[i]); 373 } 374 } 375 exit(rval); 376 case 1: 377 if (vfslist != NULL) 378 usage(); 379 380 rmslashes(*argv, *argv); 381 if (init_flags & MNT_UPDATE) { 382 mntfromname = NULL; 383 have_fstab = 0; 384 if ((mntbuf = getmntpt(*argv)) == NULL) 385 errx(1, "not currently mounted %s", *argv); 386 /* 387 * Only get the mntflags from fstab if both mntpoint 388 * and mntspec are identical. Also handle the special 389 * case where just '/' is mounted and 'spec' is not 390 * identical with the one from fstab ('/dev' is missing 391 * in the spec-string at boot-time). 392 */ 393 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 394 if (strcmp(fs->fs_spec, 395 mntbuf->f_mntfromname) == 0 && 396 strcmp(fs->fs_file, 397 mntbuf->f_mntonname) == 0) { 398 have_fstab = 1; 399 mntfromname = mntbuf->f_mntfromname; 400 } else if (argv[0][0] == '/' && 401 argv[0][1] == '\0' && 402 strcmp(fs->fs_vfstype, 403 mntbuf->f_fstypename) == 0) { 404 fs = getfsfile("/"); 405 have_fstab = 1; 406 mntfromname = fs->fs_spec; 407 } 408 } 409 if (have_fstab) { 410 options = update_options(options, fs->fs_mntops, 411 mntbuf->f_flags); 412 } else { 413 mntfromname = mntbuf->f_mntfromname; 414 options = update_options(options, NULL, 415 mntbuf->f_flags); 416 } 417 rval = mountfs(mntbuf->f_fstypename, mntfromname, 418 mntbuf->f_mntonname, init_flags, options, 0); 419 break; 420 } 421 if ((fs = getfsfile(*argv)) == NULL && 422 (fs = getfsspec(*argv)) == NULL) 423 errx(1, "%s: unknown special file or file system", 424 *argv); 425 if (BADTYPE(fs->fs_type)) 426 errx(1, "%s has unknown file system type", 427 *argv); 428 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 429 init_flags, options, fs->fs_mntops); 430 break; 431 case 2: 432 /* 433 * If -t flag has not been specified, the path cannot be 434 * found, spec contains either a ':' or a '@', then assume 435 * that an NFS file system is being specified ala Sun. 436 * Check if the hostname contains only allowed characters 437 * to reduce false positives. IPv6 addresses containing 438 * ':' will be correctly parsed only if the separator is '@'. 439 * The definition of a valid hostname is taken from RFC 1034. 440 */ 441 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 442 (ep = strchr(argv[0], ':')) != NULL)) { 443 if (*ep == '@') { 444 cp = ep + 1; 445 ep = cp + strlen(cp); 446 } else 447 cp = argv[0]; 448 while (cp != ep) { 449 if (!isdigit(*cp) && !isalpha(*cp) && 450 *cp != '.' && *cp != '-' && *cp != ':') 451 break; 452 cp++; 453 } 454 if (cp == ep) 455 vfstype = "nfs"; 456 } 457 rval = mountfs(vfstype, 458 argv[0], argv[1], init_flags, options, NULL); 459 break; 460 default: 461 usage(); 462 /* NOTREACHED */ 463 } 464 465 /* 466 * If the mount was successfully, and done by root, tell mountd the 467 * good news. 468 */ 469 if (rval == 0 && getuid() == 0) 470 restart_mountd(); 471 472 exit(rval); 473 } 474 475 int 476 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 477 { 478 char realfsfile[PATH_MAX]; 479 int i; 480 481 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 482 /* the root file system can always be remounted */ 483 return (0); 484 485 /* The user may have specified a symlink in fstab, resolve the path */ 486 if (realpath(fs->fs_file, realfsfile) == NULL) { 487 /* Cannot resolve the path, use original one */ 488 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 489 } 490 491 /* 492 * Consider the filesystem to be mounted if: 493 * It has the same mountpoint as a mounted filesytem, and 494 * It has the same type as that same mounted filesystem, and 495 * It has the same device name as that same mounted filesystem, OR 496 * It is a nonremountable filesystem 497 */ 498 for (i = mntsize - 1; i >= 0; --i) 499 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 500 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 && 501 (!isremountable(fs->fs_vfstype) || 502 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))) 503 return (1); 504 return (0); 505 } 506 507 int 508 isremountable(const char *vfsname) 509 { 510 const char **cp; 511 512 for (cp = remountable_fs_names; *cp; cp++) 513 if (strcmp(*cp, vfsname) == 0) 514 return (1); 515 return (0); 516 } 517 518 int 519 hasopt(const char *mntopts, const char *option) 520 { 521 int negative, found; 522 char *opt, *optbuf; 523 524 if (option[0] == 'n' && option[1] == 'o') { 525 negative = 1; 526 option += 2; 527 } else 528 negative = 0; 529 optbuf = strdup(mntopts); 530 found = 0; 531 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 532 if (opt[0] == 'n' && opt[1] == 'o') { 533 if (!strcasecmp(opt + 2, option)) 534 found = negative; 535 } else if (!strcasecmp(opt, option)) 536 found = !negative; 537 } 538 free(optbuf); 539 return (found); 540 } 541 542 static void 543 append_arg(struct cpa *sa, char *arg) 544 { 545 if (sa->c + 1 == sa->sz) { 546 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 547 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz); 548 if (sa->a == NULL) 549 errx(1, "realloc failed"); 550 } 551 sa->a[++sa->c] = arg; 552 } 553 554 int 555 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 556 const char *options, const char *mntopts) 557 { 558 struct statfs sf; 559 int i, ret; 560 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 561 static struct cpa mnt_argv; 562 563 /* resolve the mountpoint with realpath(3) */ 564 if (checkpath(name, mntpath) != 0) { 565 warn("%s", mntpath); 566 return (1); 567 } 568 name = mntpath; 569 570 if (mntopts == NULL) 571 mntopts = ""; 572 optbuf = catopt(strdup(mntopts), options); 573 574 if (strcmp(name, "/") == 0) 575 flags |= MNT_UPDATE; 576 if (flags & MNT_FORCE) 577 optbuf = catopt(optbuf, "force"); 578 if (flags & MNT_RDONLY) 579 optbuf = catopt(optbuf, "ro"); 580 /* 581 * XXX 582 * The mount_mfs (newfs) command uses -o to select the 583 * optimization mode. We don't pass the default "-o rw" 584 * for that reason. 585 */ 586 if (flags & MNT_UPDATE) 587 optbuf = catopt(optbuf, "update"); 588 589 /* Compatibility glue. */ 590 if (strcmp(vfstype, "msdos") == 0) { 591 warnx( 592 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated."); 593 vfstype = "msdosfs"; 594 } 595 596 /* Construct the name of the appropriate mount command */ 597 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 598 599 mnt_argv.c = -1; 600 append_arg(&mnt_argv, execname); 601 mangle(optbuf, &mnt_argv); 602 if (mountprog != NULL) 603 strlcpy(execname, mountprog, sizeof(execname)); 604 605 append_arg(&mnt_argv, strdup(spec)); 606 append_arg(&mnt_argv, strdup(name)); 607 append_arg(&mnt_argv, NULL); 608 609 if (debug) { 610 if (use_mountprog(vfstype)) 611 printf("exec: %s", execname); 612 else 613 printf("mount -t %s", vfstype); 614 for (i = 1; i < mnt_argv.c; i++) 615 (void)printf(" %s", mnt_argv.a[i]); 616 (void)printf("\n"); 617 free(optbuf); 618 free(mountprog); 619 mountprog = NULL; 620 return (0); 621 } 622 623 if (use_mountprog(vfstype)) { 624 ret = exec_mountprog(name, execname, mnt_argv.a); 625 } else { 626 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 627 } 628 629 free(optbuf); 630 free(mountprog); 631 mountprog = NULL; 632 633 if (verbose) { 634 if (statfs(name, &sf) < 0) { 635 warn("statfs %s", name); 636 return (1); 637 } 638 if (fstab_style) 639 putfsent(&sf); 640 else 641 prmount(&sf); 642 } 643 644 return (ret); 645 } 646 647 void 648 prmount(struct statfs *sfp) 649 { 650 uint64_t flags; 651 unsigned int i; 652 struct opt *o; 653 struct passwd *pw; 654 655 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 656 sfp->f_fstypename); 657 658 flags = sfp->f_flags & MNT_VISFLAGMASK; 659 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 660 if (flags & o->o_opt) { 661 (void)printf(", %s", o->o_name); 662 flags &= ~o->o_opt; 663 } 664 /* 665 * Inform when file system is mounted by an unprivileged user 666 * or privileged non-root user. 667 */ 668 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 669 (void)printf(", mounted by "); 670 if ((pw = getpwuid(sfp->f_owner)) != NULL) 671 (void)printf("%s", pw->pw_name); 672 else 673 (void)printf("%d", sfp->f_owner); 674 } 675 if (verbose) { 676 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 677 (void)printf(", writes: sync %ju async %ju", 678 (uintmax_t)sfp->f_syncwrites, 679 (uintmax_t)sfp->f_asyncwrites); 680 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 681 (void)printf(", reads: sync %ju async %ju", 682 (uintmax_t)sfp->f_syncreads, 683 (uintmax_t)sfp->f_asyncreads); 684 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 685 printf(", fsid "); 686 for (i = 0; i < sizeof(sfp->f_fsid); i++) 687 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 688 } 689 } 690 (void)printf(")\n"); 691 } 692 693 struct statfs * 694 getmntpt(const char *name) 695 { 696 struct statfs *mntbuf; 697 int i, mntsize; 698 699 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 700 for (i = mntsize - 1; i >= 0; i--) { 701 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 702 strcmp(mntbuf[i].f_mntonname, name) == 0) 703 return (&mntbuf[i]); 704 } 705 return (NULL); 706 } 707 708 char * 709 catopt(char *s0, const char *s1) 710 { 711 char *cp; 712 713 if (s1 == NULL || *s1 == '\0') 714 return (s0); 715 716 if (s0 && *s0) { 717 if (asprintf(&cp, "%s,%s", s0, s1) == -1) 718 errx(1, "asprintf failed"); 719 } else 720 cp = strdup(s1); 721 722 if (s0) 723 free(s0); 724 return (cp); 725 } 726 727 void 728 mangle(char *options, struct cpa *a) 729 { 730 char *p, *s, *val; 731 732 for (s = options; (p = strsep(&s, ",")) != NULL;) 733 if (*p != '\0') { 734 if (strcmp(p, "noauto") == 0) { 735 /* 736 * Do not pass noauto option to nmount(). 737 * or external mount program. noauto is 738 * only used to prevent mounting a filesystem 739 * when 'mount -a' is specified, and is 740 * not a real mount option. 741 */ 742 continue; 743 } else if (strcmp(p, "late") == 0) { 744 /* 745 * "late" is used to prevent certain file 746 * systems from being mounted before late 747 * in the boot cycle; for instance, 748 * loopback NFS mounts can't be mounted 749 * before mountd starts. 750 */ 751 continue; 752 } else if (strcmp(p, "failok") == 0) { 753 /* 754 * "failok" is used to prevent certain file 755 * systems from being causing the system to 756 * drop into single user mode in the boot 757 * cycle, and is not a real mount option. 758 */ 759 continue; 760 } else if (strncmp(p, "mountprog", 9) == 0) { 761 /* 762 * "mountprog" is used to force the use of 763 * userland mount programs. 764 */ 765 val = strchr(p, '='); 766 if (val != NULL) { 767 ++val; 768 if (*val != '\0') 769 mountprog = strdup(val); 770 } 771 772 if (mountprog == NULL) { 773 errx(1, "Need value for -o mountprog"); 774 } 775 continue; 776 } else if (strcmp(p, "userquota") == 0) { 777 continue; 778 } else if (strncmp(p, userquotaeq, 779 sizeof(userquotaeq) - 1) == 0) { 780 continue; 781 } else if (strcmp(p, "groupquota") == 0) { 782 continue; 783 } else if (strncmp(p, groupquotaeq, 784 sizeof(groupquotaeq) - 1) == 0) { 785 continue; 786 } else if (*p == '-') { 787 append_arg(a, p); 788 p = strchr(p, '='); 789 if (p != NULL) { 790 *p = '\0'; 791 append_arg(a, p + 1); 792 } 793 } else { 794 append_arg(a, strdup("-o")); 795 append_arg(a, p); 796 } 797 } 798 } 799 800 801 char * 802 update_options(char *opts, char *fstab, int curflags) 803 { 804 char *o, *p; 805 char *cur; 806 char *expopt, *newopt, *tmpopt; 807 808 if (opts == NULL) 809 return (strdup("")); 810 811 /* remove meta options from list */ 812 remopt(fstab, MOUNT_META_OPTION_FSTAB); 813 remopt(fstab, MOUNT_META_OPTION_CURRENT); 814 cur = flags2opts(curflags); 815 816 /* 817 * Expand all meta-options passed to us first. 818 */ 819 expopt = NULL; 820 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 821 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 822 expopt = catopt(expopt, fstab); 823 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 824 expopt = catopt(expopt, cur); 825 else 826 expopt = catopt(expopt, o); 827 } 828 free(cur); 829 free(opts); 830 831 /* 832 * Remove previous contradictory arguments. Given option "foo" we 833 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 834 * and "foo" - so we can deal with possible options like "notice". 835 */ 836 newopt = NULL; 837 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 838 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 839 errx(1, "malloc failed"); 840 841 strcpy(tmpopt, "no"); 842 strcat(tmpopt, o); 843 remopt(newopt, tmpopt); 844 free(tmpopt); 845 846 if (strncmp("no", o, 2) == 0) 847 remopt(newopt, o+2); 848 849 newopt = catopt(newopt, o); 850 } 851 free(expopt); 852 853 return (newopt); 854 } 855 856 void 857 remopt(char *string, const char *opt) 858 { 859 char *o, *p, *r; 860 861 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 862 return; 863 864 r = string; 865 866 for (p = string; (o = strsep(&p, ",")) != NULL;) { 867 if (strcmp(opt, o) != 0) { 868 if (*r == ',' && *o != '\0') 869 r++; 870 while ((*r++ = *o++) != '\0') 871 ; 872 *--r = ','; 873 } 874 } 875 *r = '\0'; 876 } 877 878 void 879 usage(void) 880 { 881 882 (void)fprintf(stderr, "%s\n%s\n%s\n", 883 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 884 " mount [-dfpruvw] special | node", 885 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 886 exit(1); 887 } 888 889 void 890 putfsent(struct statfs *ent) 891 { 892 struct fstab *fst; 893 char *opts, *rw; 894 int l; 895 896 opts = NULL; 897 /* flags2opts() doesn't return the "rw" option. */ 898 if ((ent->f_flags & MNT_RDONLY) != 0) 899 rw = NULL; 900 else 901 rw = catopt(NULL, "rw"); 902 903 opts = flags2opts(ent->f_flags); 904 opts = catopt(rw, opts); 905 906 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 907 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 908 strlcpy(ent->f_mntfromname, 909 (strnstr(ent->f_mntfromname, ":", 8) +1), 910 sizeof(ent->f_mntfromname)); 911 } 912 913 l = strlen(ent->f_mntfromname); 914 printf("%s%s%s%s", ent->f_mntfromname, 915 l < 8 ? "\t" : "", 916 l < 16 ? "\t" : "", 917 l < 24 ? "\t" : " "); 918 l = strlen(ent->f_mntonname); 919 printf("%s%s%s%s", ent->f_mntonname, 920 l < 8 ? "\t" : "", 921 l < 16 ? "\t" : "", 922 l < 24 ? "\t" : " "); 923 printf("%s\t", ent->f_fstypename); 924 l = strlen(opts); 925 printf("%s%s", opts, 926 l < 8 ? "\t" : " "); 927 free(opts); 928 929 if ((fst = getfsspec(ent->f_mntfromname))) 930 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 931 else if ((fst = getfsfile(ent->f_mntonname))) 932 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 933 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 934 if (strcmp(ent->f_mntonname, "/") == 0) 935 printf("\t1 1\n"); 936 else 937 printf("\t2 2\n"); 938 } else 939 printf("\t0 0\n"); 940 } 941 942 943 char * 944 flags2opts(int flags) 945 { 946 char *res; 947 948 res = NULL; 949 950 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 951 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 952 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 953 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 954 if (flags & MNT_UNION) res = catopt(res, "union"); 955 if (flags & MNT_ASYNC) res = catopt(res, "async"); 956 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 957 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 958 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 959 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 960 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 961 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 962 if (flags & MNT_ACLS) res = catopt(res, "acls"); 963 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 964 965 return (res); 966 } 967