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 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 39 #endif 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/mount.h> 46 #include <sys/stat.h> 47 #include <sys/wait.h> 48 49 #include <ctype.h> 50 #include <err.h> 51 #include <errno.h> 52 #include <fstab.h> 53 #include <paths.h> 54 #include <pwd.h> 55 #include <signal.h> 56 #include <stdint.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <libutil.h> 62 63 #include "extern.h" 64 #include "mntopts.h" 65 #include "pathnames.h" 66 67 /* `meta' options */ 68 #define MOUNT_META_OPTION_FSTAB "fstab" 69 #define MOUNT_META_OPTION_CURRENT "current" 70 71 int debug, fstab_style, verbose; 72 73 char *catopt(char *, const char *); 74 struct statfs *getmntpt(const char *); 75 int hasopt(const char *, const char *); 76 int ismounted(struct fstab *, struct statfs *, int); 77 int isremountable(const char *); 78 void mangle(char *, int *, char *[]); 79 char *update_options(char *, char *, int); 80 int mountfs(const char *, const char *, const char *, 81 int, const char *, const char *); 82 void remopt(char *, const char *); 83 void prmount(struct statfs *); 84 void putfsent(const struct statfs *); 85 void usage(void); 86 char *flags2opts(int); 87 88 /* Map from mount options to printable formats. */ 89 static struct opt { 90 int o_opt; 91 const char *o_name; 92 } optnames[] = { 93 { MNT_ASYNC, "asynchronous" }, 94 { MNT_EXPORTED, "NFS exported" }, 95 { MNT_LOCAL, "local" }, 96 { MNT_NOATIME, "noatime" }, 97 { MNT_NOEXEC, "noexec" }, 98 { MNT_NOSUID, "nosuid" }, 99 { MNT_NOSYMFOLLOW, "nosymfollow" }, 100 { MNT_QUOTA, "with quotas" }, 101 { MNT_RDONLY, "read-only" }, 102 { MNT_SYNCHRONOUS, "synchronous" }, 103 { MNT_UNION, "union" }, 104 { MNT_NOCLUSTERR, "noclusterr" }, 105 { MNT_NOCLUSTERW, "noclusterw" }, 106 { MNT_SUIDDIR, "suiddir" }, 107 { MNT_SOFTDEP, "soft-updates" }, 108 { MNT_MULTILABEL, "multilabel" }, 109 { MNT_ACLS, "acls" }, 110 { MNT_GJOURNAL, "gjournal" }, 111 { 0, NULL } 112 }; 113 114 /* 115 * List of VFS types that can be remounted without becoming mounted on top 116 * of each other. 117 * XXX Is this list correct? 118 */ 119 static const char * 120 remountable_fs_names[] = { 121 "ufs", "ffs", "ext2fs", 122 0 123 }; 124 125 static const char userquotaeq[] = "userquota="; 126 static const char groupquotaeq[] = "groupquota="; 127 128 static int 129 use_mountprog(const char *vfstype) 130 { 131 /* XXX: We need to get away from implementing external mount 132 * programs for every filesystem, and move towards having 133 * each filesystem properly implement the nmount() system call. 134 */ 135 unsigned int i; 136 const char *fs[] = { 137 "cd9660", "mfs", "msdosfs", "nfs", "nfs4", "ntfs", 138 "nwfs", "nullfs", "portalfs", "smbfs", "udf", "umapfs", 139 "unionfs", 140 NULL 141 }; 142 143 for (i = 0; fs[i] != NULL; ++i) { 144 if (strcmp(vfstype, fs[i]) == 0) 145 return (1); 146 } 147 148 return (0); 149 } 150 151 static int 152 exec_mountprog(const char *name, const char *execname, char *const argv[]) 153 { 154 pid_t pid; 155 int status; 156 157 switch (pid = fork()) { 158 case -1: /* Error. */ 159 warn("fork"); 160 exit (1); 161 case 0: /* Child. */ 162 /* Go find an executable. */ 163 execvP(execname, _PATH_SYSPATH, argv); 164 if (errno == ENOENT) { 165 warn("exec %s not found in %s", execname, 166 _PATH_SYSPATH); 167 } 168 exit(1); 169 default: /* Parent. */ 170 if (waitpid(pid, &status, 0) < 0) { 171 warn("waitpid"); 172 return (1); 173 } 174 175 if (WIFEXITED(status)) { 176 if (WEXITSTATUS(status) != 0) 177 return (WEXITSTATUS(status)); 178 } else if (WIFSIGNALED(status)) { 179 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 180 return (1); 181 } 182 break; 183 } 184 185 return (0); 186 } 187 188 static int 189 specified_ro(const char *arg) 190 { 191 char *optbuf, *opt; 192 int ret = 0; 193 194 optbuf = strdup(arg); 195 if (optbuf == NULL) 196 err(1, NULL); 197 198 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 199 if (strcmp(opt, "ro") == 0) { 200 ret = 1; 201 break; 202 } 203 } 204 free(optbuf); 205 return (ret); 206 } 207 208 static void 209 restart_mountd(void) 210 { 211 struct pidfh *pfh; 212 pid_t mountdpid; 213 214 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 215 if (pfh != NULL) { 216 /* Mountd is not running. */ 217 pidfile_remove(pfh); 218 return; 219 } 220 if (errno != EEXIST) { 221 /* Cannot open pidfile for some reason. */ 222 return; 223 } 224 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 225 if (kill(mountdpid, SIGHUP) == -1) 226 err(1, "signal mountd"); 227 } 228 229 int 230 main(int argc, char *argv[]) 231 { 232 const char *mntfromname, **vfslist, *vfstype; 233 struct fstab *fs; 234 struct statfs *mntbuf; 235 int all, ch, i, init_flags, late, mntsize, rval, have_fstab, ro; 236 char *cp, *ep, *options; 237 238 all = init_flags = late = 0; 239 ro = 0; 240 options = NULL; 241 vfslist = NULL; 242 vfstype = "ufs"; 243 while ((ch = getopt(argc, argv, "adF:flo:prt:uvw")) != -1) 244 switch (ch) { 245 case 'a': 246 all = 1; 247 break; 248 case 'd': 249 debug = 1; 250 break; 251 case 'F': 252 setfstab(optarg); 253 break; 254 case 'f': 255 init_flags |= MNT_FORCE; 256 break; 257 case 'l': 258 late = 1; 259 break; 260 case 'o': 261 if (*optarg) { 262 options = catopt(options, optarg); 263 if (specified_ro(optarg)) 264 ro = 1; 265 } 266 break; 267 case 'p': 268 fstab_style = 1; 269 verbose = 1; 270 break; 271 case 'r': 272 options = catopt(options, "ro"); 273 ro = 1; 274 break; 275 case 't': 276 if (vfslist != NULL) 277 errx(1, "only one -t option may be specified"); 278 vfslist = makevfslist(optarg); 279 vfstype = optarg; 280 break; 281 case 'u': 282 init_flags |= MNT_UPDATE; 283 break; 284 case 'v': 285 verbose = 1; 286 break; 287 case 'w': 288 options = catopt(options, "noro"); 289 break; 290 case '?': 291 default: 292 usage(); 293 /* NOTREACHED */ 294 } 295 argc -= optind; 296 argv += optind; 297 298 #define BADTYPE(type) \ 299 (strcmp(type, FSTAB_RO) && \ 300 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 301 302 if ((init_flags & MNT_UPDATE) && (ro == 0)) 303 options = catopt(options, "noro"); 304 305 rval = 0; 306 switch (argc) { 307 case 0: 308 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 309 err(1, "getmntinfo"); 310 if (all) { 311 while ((fs = getfsent()) != NULL) { 312 if (BADTYPE(fs->fs_type)) 313 continue; 314 if (checkvfsname(fs->fs_vfstype, vfslist)) 315 continue; 316 if (hasopt(fs->fs_mntops, "noauto")) 317 continue; 318 if (hasopt(fs->fs_mntops, "late") && !late) 319 continue; 320 if (!(init_flags & MNT_UPDATE) && 321 ismounted(fs, mntbuf, mntsize)) 322 continue; 323 options = update_options(options, fs->fs_mntops, 324 mntbuf->f_flags); 325 if (mountfs(fs->fs_vfstype, fs->fs_spec, 326 fs->fs_file, init_flags, options, 327 fs->fs_mntops)) 328 rval = 1; 329 } 330 } else if (fstab_style) { 331 for (i = 0; i < mntsize; i++) { 332 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 333 continue; 334 putfsent(&mntbuf[i]); 335 } 336 } else { 337 for (i = 0; i < mntsize; i++) { 338 if (checkvfsname(mntbuf[i].f_fstypename, 339 vfslist)) 340 continue; 341 prmount(&mntbuf[i]); 342 } 343 } 344 exit(rval); 345 case 1: 346 if (vfslist != NULL) 347 usage(); 348 349 rmslashes(*argv, *argv); 350 if (init_flags & MNT_UPDATE) { 351 mntfromname = NULL; 352 have_fstab = 0; 353 if ((mntbuf = getmntpt(*argv)) == NULL) 354 errx(1, "not currently mounted %s", *argv); 355 /* 356 * Only get the mntflags from fstab if both mntpoint 357 * and mntspec are identical. Also handle the special 358 * case where just '/' is mounted and 'spec' is not 359 * identical with the one from fstab ('/dev' is missing 360 * in the spec-string at boot-time). 361 */ 362 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 363 if (strcmp(fs->fs_spec, 364 mntbuf->f_mntfromname) == 0 && 365 strcmp(fs->fs_file, 366 mntbuf->f_mntonname) == 0) { 367 have_fstab = 1; 368 mntfromname = mntbuf->f_mntfromname; 369 } else if (argv[0][0] == '/' && 370 argv[0][1] == '\0') { 371 fs = getfsfile("/"); 372 have_fstab = 1; 373 mntfromname = fs->fs_spec; 374 } 375 } 376 if (have_fstab) { 377 options = update_options(options, fs->fs_mntops, 378 mntbuf->f_flags); 379 } else { 380 mntfromname = mntbuf->f_mntfromname; 381 options = update_options(options, NULL, 382 mntbuf->f_flags); 383 } 384 rval = mountfs(mntbuf->f_fstypename, mntfromname, 385 mntbuf->f_mntonname, init_flags, options, 0); 386 break; 387 } 388 if ((fs = getfsfile(*argv)) == NULL && 389 (fs = getfsspec(*argv)) == NULL) 390 errx(1, "%s: unknown special file or file system", 391 *argv); 392 if (BADTYPE(fs->fs_type)) 393 errx(1, "%s has unknown file system type", 394 *argv); 395 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 396 init_flags, options, fs->fs_mntops); 397 break; 398 case 2: 399 /* 400 * If -t flag has not been specified, the path cannot be 401 * found, spec contains either a ':' or a '@', then assume 402 * that an NFS file system is being specified ala Sun. 403 * Check if the hostname contains only allowed characters 404 * to reduce false positives. IPv6 addresses containing 405 * ':' will be correctly parsed only if the separator is '@'. 406 * The definition of a valid hostname is taken from RFC 1034. 407 */ 408 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 409 (ep = strchr(argv[0], ':')) != NULL)) { 410 if (*ep == '@') { 411 cp = ep + 1; 412 ep = cp + strlen(cp); 413 } else 414 cp = argv[0]; 415 while (cp != ep) { 416 if (!isdigit(*cp) && !isalpha(*cp) && 417 *cp != '.' && *cp != '-' && *cp != ':') 418 break; 419 cp++; 420 } 421 if (cp == ep) 422 vfstype = "nfs"; 423 } 424 rval = mountfs(vfstype, 425 argv[0], argv[1], init_flags, options, NULL); 426 break; 427 default: 428 usage(); 429 /* NOTREACHED */ 430 } 431 432 /* 433 * If the mount was successfully, and done by root, tell mountd the 434 * good news. 435 */ 436 if (rval == 0 && getuid() == 0) 437 restart_mountd(); 438 439 exit(rval); 440 } 441 442 int 443 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 444 { 445 char realfsfile[PATH_MAX]; 446 int i; 447 448 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 449 /* the root file system can always be remounted */ 450 return (0); 451 452 /* The user may have specified a symlink in fstab, resolve the path */ 453 if (realpath(fs->fs_file, realfsfile) == NULL) { 454 /* Cannot resolve the path, use original one */ 455 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 456 } 457 458 for (i = mntsize - 1; i >= 0; --i) 459 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 460 (!isremountable(fs->fs_vfstype) || 461 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 462 return (1); 463 return (0); 464 } 465 466 int 467 isremountable(const char *vfsname) 468 { 469 const char **cp; 470 471 for (cp = remountable_fs_names; *cp; cp++) 472 if (strcmp(*cp, vfsname) == 0) 473 return (1); 474 return (0); 475 } 476 477 int 478 hasopt(const char *mntopts, const char *option) 479 { 480 int negative, found; 481 char *opt, *optbuf; 482 483 if (option[0] == 'n' && option[1] == 'o') { 484 negative = 1; 485 option += 2; 486 } else 487 negative = 0; 488 optbuf = strdup(mntopts); 489 found = 0; 490 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 491 if (opt[0] == 'n' && opt[1] == 'o') { 492 if (!strcasecmp(opt + 2, option)) 493 found = negative; 494 } else if (!strcasecmp(opt, option)) 495 found = !negative; 496 } 497 free(optbuf); 498 return (found); 499 } 500 501 int 502 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 503 const char *options, const char *mntopts) 504 { 505 char *argv[100]; 506 struct statfs sf; 507 int argc, i, ret; 508 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 509 510 /* resolve the mountpoint with realpath(3) */ 511 (void)checkpath(name, mntpath); 512 name = mntpath; 513 514 if (mntopts == NULL) 515 mntopts = ""; 516 optbuf = catopt(strdup(mntopts), options); 517 518 if (strcmp(name, "/") == 0) 519 flags |= MNT_UPDATE; 520 if (flags & MNT_FORCE) 521 optbuf = catopt(optbuf, "force"); 522 if (flags & MNT_RDONLY) 523 optbuf = catopt(optbuf, "ro"); 524 /* 525 * XXX 526 * The mount_mfs (newfs) command uses -o to select the 527 * optimization mode. We don't pass the default "-o rw" 528 * for that reason. 529 */ 530 if (flags & MNT_UPDATE) 531 optbuf = catopt(optbuf, "update"); 532 533 /* Compatibility glue. */ 534 if (strcmp(vfstype, "msdos") == 0) { 535 warnx( 536 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated."); 537 vfstype = "msdosfs"; 538 } 539 540 /* Construct the name of the appropriate mount command */ 541 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 542 543 argc = 0; 544 argv[argc++] = execname; 545 mangle(optbuf, &argc, argv); 546 argv[argc++] = strdup(spec); 547 argv[argc++] = strdup(name); 548 argv[argc] = NULL; 549 550 if (debug) { 551 if (use_mountprog(vfstype)) 552 printf("exec: mount_%s", vfstype); 553 else 554 printf("mount -t %s", vfstype); 555 for (i = 1; i < argc; i++) 556 (void)printf(" %s", argv[i]); 557 (void)printf("\n"); 558 return (0); 559 } 560 561 if (use_mountprog(vfstype)) { 562 ret = exec_mountprog(name, execname, argv); 563 } else { 564 ret = mount_fs(vfstype, argc, argv); 565 } 566 567 free(optbuf); 568 569 if (verbose) { 570 if (statfs(name, &sf) < 0) { 571 warn("statfs %s", name); 572 return (1); 573 } 574 if (fstab_style) 575 putfsent(&sf); 576 else 577 prmount(&sf); 578 } 579 580 return (0); 581 } 582 583 void 584 prmount(struct statfs *sfp) 585 { 586 int flags; 587 unsigned int i; 588 struct opt *o; 589 struct passwd *pw; 590 591 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 592 sfp->f_fstypename); 593 594 flags = sfp->f_flags & MNT_VISFLAGMASK; 595 for (o = optnames; flags && o->o_opt; o++) 596 if (flags & o->o_opt) { 597 (void)printf(", %s", o->o_name); 598 flags &= ~o->o_opt; 599 } 600 /* 601 * Inform when file system is mounted by an unprivileged user 602 * or privileged non-root user. 603 */ 604 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 605 (void)printf(", mounted by "); 606 if ((pw = getpwuid(sfp->f_owner)) != NULL) 607 (void)printf("%s", pw->pw_name); 608 else 609 (void)printf("%d", sfp->f_owner); 610 } 611 if (verbose) { 612 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 613 (void)printf(", writes: sync %ju async %ju", 614 (uintmax_t)sfp->f_syncwrites, 615 (uintmax_t)sfp->f_asyncwrites); 616 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 617 (void)printf(", reads: sync %ju async %ju", 618 (uintmax_t)sfp->f_syncreads, 619 (uintmax_t)sfp->f_asyncreads); 620 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 621 printf(", fsid "); 622 for (i = 0; i < sizeof(sfp->f_fsid); i++) 623 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 624 } 625 } 626 (void)printf(")\n"); 627 } 628 629 struct statfs * 630 getmntpt(const char *name) 631 { 632 struct statfs *mntbuf; 633 int i, mntsize; 634 635 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 636 for (i = mntsize - 1; i >= 0; i--) { 637 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 638 strcmp(mntbuf[i].f_mntonname, name) == 0) 639 return (&mntbuf[i]); 640 } 641 return (NULL); 642 } 643 644 char * 645 catopt(char *s0, const char *s1) 646 { 647 size_t i; 648 char *cp; 649 650 if (s1 == NULL || *s1 == '\0') 651 return (s0); 652 653 if (s0 && *s0) { 654 i = strlen(s0) + strlen(s1) + 1 + 1; 655 if ((cp = malloc(i)) == NULL) 656 errx(1, "malloc failed"); 657 (void)snprintf(cp, i, "%s,%s", s0, s1); 658 } else 659 cp = strdup(s1); 660 661 if (s0) 662 free(s0); 663 return (cp); 664 } 665 666 void 667 mangle(char *options, int *argcp, char *argv[]) 668 { 669 char *p, *s; 670 int argc; 671 672 argc = *argcp; 673 for (s = options; (p = strsep(&s, ",")) != NULL;) 674 if (*p != '\0') { 675 if (strcmp(p, "noauto") == 0) { 676 /* 677 * Do not pass noauto option to nmount(). 678 * or external mount program. noauto is 679 * only used to prevent mounting a filesystem 680 * when 'mount -a' is specified, and is 681 * not a real mount option. 682 */ 683 continue; 684 } else if (strcmp(p, "late") == 0) { 685 /* 686 * "late" is used to prevent certain file 687 * systems from being mounted before late 688 * in the boot cycle; for instance, 689 * loopback NFS mounts can't be mounted 690 * before mountd starts. 691 */ 692 continue; 693 } else if (strcmp(p, "userquota") == 0) { 694 continue; 695 } else if (strncmp(p, userquotaeq, 696 sizeof(userquotaeq) - 1) == 0) { 697 continue; 698 } else if (strcmp(p, "groupquota") == 0) { 699 continue; 700 } else if (strncmp(p, groupquotaeq, 701 sizeof(groupquotaeq) - 1) == 0) { 702 continue; 703 } else if (*p == '-') { 704 argv[argc++] = p; 705 p = strchr(p, '='); 706 if (p != NULL) { 707 *p = '\0'; 708 argv[argc++] = p+1; 709 } 710 } else { 711 argv[argc++] = strdup("-o"); 712 argv[argc++] = p; 713 } 714 } 715 716 *argcp = argc; 717 } 718 719 720 char * 721 update_options(char *opts, char *fstab, int curflags) 722 { 723 char *o, *p; 724 char *cur; 725 char *expopt, *newopt, *tmpopt; 726 727 if (opts == NULL) 728 return (strdup("")); 729 730 /* remove meta options from list */ 731 remopt(fstab, MOUNT_META_OPTION_FSTAB); 732 remopt(fstab, MOUNT_META_OPTION_CURRENT); 733 cur = flags2opts(curflags); 734 735 /* 736 * Expand all meta-options passed to us first. 737 */ 738 expopt = NULL; 739 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 740 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 741 expopt = catopt(expopt, fstab); 742 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 743 expopt = catopt(expopt, cur); 744 else 745 expopt = catopt(expopt, o); 746 } 747 free(cur); 748 free(opts); 749 750 /* 751 * Remove previous contradictory arguments. Given option "foo" we 752 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 753 * and "foo" - so we can deal with possible options like "notice". 754 */ 755 newopt = NULL; 756 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 757 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 758 errx(1, "malloc failed"); 759 760 strcpy(tmpopt, "no"); 761 strcat(tmpopt, o); 762 remopt(newopt, tmpopt); 763 free(tmpopt); 764 765 if (strncmp("no", o, 2) == 0) 766 remopt(newopt, o+2); 767 768 newopt = catopt(newopt, o); 769 } 770 free(expopt); 771 772 return (newopt); 773 } 774 775 void 776 remopt(char *string, const char *opt) 777 { 778 char *o, *p, *r; 779 780 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 781 return; 782 783 r = string; 784 785 for (p = string; (o = strsep(&p, ",")) != NULL;) { 786 if (strcmp(opt, o) != 0) { 787 if (*r == ',' && *o != '\0') 788 r++; 789 while ((*r++ = *o++) != '\0') 790 ; 791 *--r = ','; 792 } 793 } 794 *r = '\0'; 795 } 796 797 void 798 usage(void) 799 { 800 801 (void)fprintf(stderr, "%s\n%s\n%s\n", 802 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 803 " mount [-dfpruvw] special | node", 804 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 805 exit(1); 806 } 807 808 void 809 putfsent(const struct statfs *ent) 810 { 811 struct fstab *fst; 812 char *opts; 813 int l; 814 815 opts = flags2opts(ent->f_flags); 816 817 /* 818 * "rw" is not a real mount option; this is why we print NULL as "rw" 819 * if opts is still NULL here. 820 */ 821 l = strlen(ent->f_mntfromname); 822 printf("%s%s%s%s", ent->f_mntfromname, 823 l < 8 ? "\t" : "", 824 l < 16 ? "\t" : "", 825 l < 24 ? "\t" : " "); 826 l = strlen(ent->f_mntonname); 827 printf("%s%s%s%s", ent->f_mntonname, 828 l < 8 ? "\t" : "", 829 l < 16 ? "\t" : "", 830 l < 24 ? "\t" : " "); 831 printf("%s\t", ent->f_fstypename); 832 if (opts == NULL) { 833 printf("%s\t", "rw"); 834 } else { 835 l = strlen(opts); 836 printf("%s%s", opts, 837 l < 8 ? "\t" : " "); 838 } 839 free(opts); 840 841 if ((fst = getfsspec(ent->f_mntfromname))) 842 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 843 else if ((fst = getfsfile(ent->f_mntonname))) 844 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 845 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 846 if (strcmp(ent->f_mntonname, "/") == 0) 847 printf("\t1 1\n"); 848 else 849 printf("\t2 2\n"); 850 } else 851 printf("\t0 0\n"); 852 } 853 854 855 char * 856 flags2opts(int flags) 857 { 858 char *res; 859 860 res = NULL; 861 862 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 863 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 864 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 865 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 866 if (flags & MNT_UNION) res = catopt(res, "union"); 867 if (flags & MNT_ASYNC) res = catopt(res, "async"); 868 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 869 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 870 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 871 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 872 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 873 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 874 if (flags & MNT_ACLS) res = catopt(res, "acls"); 875 if (flags & MNT_GJOURNAL) res = catopt(res, "gjournal"); 876 877 return (res); 878 } 879