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