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