1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #if 0 37 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 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 static int debug, fstab_style, verbose; 72 73 struct cpa { 74 char **a; 75 ssize_t sz; 76 int c; 77 }; 78 79 char *catopt(char *, const char *); 80 struct statfs *getmntpt(const char *); 81 int hasopt(const char *, const char *); 82 int ismounted(struct fstab *, struct statfs *, int); 83 int isremountable(const char *); 84 void mangle(char *, struct cpa *); 85 char *update_options(char *, char *, int); 86 int mountfs(const char *, const char *, const char *, 87 int, const char *, const char *); 88 void remopt(char *, const char *); 89 void prmount(struct statfs *); 90 void putfsent(struct statfs *); 91 void usage(void); 92 char *flags2opts(int); 93 94 /* Map from mount options to printable formats. */ 95 static struct opt { 96 uint64_t o_opt; 97 const char *o_name; 98 } optnames[] = { 99 { MNT_ASYNC, "asynchronous" }, 100 { MNT_EXPORTED, "NFS exported" }, 101 { MNT_LOCAL, "local" }, 102 { MNT_NOATIME, "noatime" }, 103 { MNT_NOEXEC, "noexec" }, 104 { MNT_NOSUID, "nosuid" }, 105 { MNT_NOSYMFOLLOW, "nosymfollow" }, 106 { MNT_QUOTA, "with quotas" }, 107 { MNT_RDONLY, "read-only" }, 108 { MNT_SYNCHRONOUS, "synchronous" }, 109 { MNT_UNION, "union" }, 110 { MNT_NOCLUSTERR, "noclusterr" }, 111 { MNT_NOCLUSTERW, "noclusterw" }, 112 { MNT_SUIDDIR, "suiddir" }, 113 { MNT_SOFTDEP, "soft-updates" }, 114 { MNT_SUJ, "journaled soft-updates" }, 115 { MNT_MULTILABEL, "multilabel" }, 116 { MNT_ACLS, "acls" }, 117 { MNT_NFS4ACLS, "nfsv4acls" }, 118 { MNT_GJOURNAL, "gjournal" }, 119 { MNT_AUTOMOUNTED, "automounted" }, 120 { MNT_VERIFIED, "verified" }, 121 { MNT_UNTRUSTED, "untrusted" }, 122 { MNT_NOCOVER, "nocover" }, 123 { MNT_EMPTYDIR, "emptydir" }, 124 { 0, NULL } 125 }; 126 127 /* 128 * List of VFS types that can be remounted without becoming mounted on top 129 * of each other. 130 * XXX Is this list correct? 131 */ 132 static const char * 133 remountable_fs_names[] = { 134 "ufs", "ffs", "ext2fs", 135 0 136 }; 137 138 static const char userquotaeq[] = "userquota="; 139 static const char groupquotaeq[] = "groupquota="; 140 141 static char *mountprog = NULL; 142 143 static int 144 use_mountprog(const char *vfstype) 145 { 146 /* XXX: We need to get away from implementing external mount 147 * programs for every filesystem, and move towards having 148 * each filesystem properly implement the nmount() system call. 149 */ 150 unsigned int i; 151 const char *fs[] = { 152 "cd9660", "mfs", "msdosfs", "nfs", 153 "nullfs", "smbfs", "udf", "unionfs", 154 NULL 155 }; 156 157 if (mountprog != NULL) 158 return (1); 159 160 for (i = 0; fs[i] != NULL; ++i) { 161 if (strcmp(vfstype, fs[i]) == 0) 162 return (1); 163 } 164 165 return (0); 166 } 167 168 static int 169 exec_mountprog(const char *name, const char *execname, char *const argv[]) 170 { 171 pid_t pid; 172 int status; 173 174 switch (pid = fork()) { 175 case -1: /* Error. */ 176 warn("fork"); 177 exit (1); 178 case 0: /* Child. */ 179 /* Go find an executable. */ 180 execvP(execname, _PATH_SYSPATH, argv); 181 if (errno == ENOENT) { 182 warn("exec %s not found", execname); 183 if (execname[0] != '/') { 184 warnx("in path: %s", _PATH_SYSPATH); 185 } 186 } 187 exit(1); 188 default: /* Parent. */ 189 if (waitpid(pid, &status, 0) < 0) { 190 warn("waitpid"); 191 return (1); 192 } 193 194 if (WIFEXITED(status)) { 195 if (WEXITSTATUS(status) != 0) 196 return (WEXITSTATUS(status)); 197 } else if (WIFSIGNALED(status)) { 198 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 199 return (1); 200 } 201 break; 202 } 203 204 return (0); 205 } 206 207 static int 208 specified_ro(const char *arg) 209 { 210 char *optbuf, *opt; 211 int ret = 0; 212 213 optbuf = strdup(arg); 214 if (optbuf == NULL) 215 err(1, NULL); 216 217 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 218 if (strcmp(opt, "ro") == 0) { 219 ret = 1; 220 break; 221 } 222 } 223 free(optbuf); 224 return (ret); 225 } 226 227 static void 228 restart_mountd(void) 229 { 230 struct pidfh *pfh; 231 pid_t mountdpid; 232 233 mountdpid = 0; 234 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 235 if (pfh != NULL) { 236 /* Mountd is not running. */ 237 pidfile_remove(pfh); 238 return; 239 } 240 if (errno != EEXIST) { 241 /* Cannot open pidfile for some reason. */ 242 return; 243 } 244 245 /* 246 * Refuse to send broadcast or group signals, this has 247 * happened due to the bugs in pidfile(3). 248 */ 249 if (mountdpid <= 0) { 250 warnx("mountd pid %d, refusing to send SIGHUP", mountdpid); 251 return; 252 } 253 254 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 255 if (kill(mountdpid, SIGHUP) == -1) 256 err(1, "signal mountd"); 257 } 258 259 int 260 main(int argc, char *argv[]) 261 { 262 const char *mntfromname, **vfslist, *vfstype; 263 struct fstab *fs; 264 struct statfs *mntbuf; 265 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro; 266 int onlylate; 267 char *cp, *ep, *options; 268 269 all = init_flags = late = onlylate = 0; 270 ro = 0; 271 options = NULL; 272 vfslist = NULL; 273 vfstype = "ufs"; 274 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1) 275 switch (ch) { 276 case 'a': 277 all = 1; 278 break; 279 case 'd': 280 debug = 1; 281 break; 282 case 'F': 283 setfstab(optarg); 284 break; 285 case 'f': 286 init_flags |= MNT_FORCE; 287 break; 288 case 'L': 289 onlylate = 1; 290 late = 1; 291 break; 292 case 'l': 293 late = 1; 294 break; 295 case 'n': 296 /* For compatibility with the Linux version of mount. */ 297 break; 298 case 'o': 299 if (*optarg) { 300 options = catopt(options, optarg); 301 if (specified_ro(optarg)) 302 ro = 1; 303 } 304 break; 305 case 'p': 306 fstab_style = 1; 307 verbose = 1; 308 break; 309 case 'r': 310 options = catopt(options, "ro"); 311 ro = 1; 312 break; 313 case 't': 314 if (vfslist != NULL) 315 errx(1, "only one -t option may be specified"); 316 vfslist = makevfslist(optarg); 317 vfstype = optarg; 318 break; 319 case 'u': 320 init_flags |= MNT_UPDATE; 321 break; 322 case 'v': 323 verbose = 1; 324 break; 325 case 'w': 326 options = catopt(options, "noro"); 327 break; 328 case '?': 329 default: 330 usage(); 331 /* NOTREACHED */ 332 } 333 argc -= optind; 334 argv += optind; 335 336 #define BADTYPE(type) \ 337 (strcmp(type, FSTAB_RO) && \ 338 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 339 340 if ((init_flags & MNT_UPDATE) && (ro == 0)) 341 options = catopt(options, "noro"); 342 343 rval = 0; 344 switch (argc) { 345 case 0: 346 if ((mntsize = getmntinfo(&mntbuf, 347 verbose ? MNT_WAIT : MNT_NOWAIT)) == 0) 348 err(1, "getmntinfo"); 349 if (all) { 350 while ((fs = getfsent()) != NULL) { 351 if (BADTYPE(fs->fs_type)) 352 continue; 353 if (checkvfsname(fs->fs_vfstype, vfslist)) 354 continue; 355 if (hasopt(fs->fs_mntops, "noauto")) 356 continue; 357 if (!hasopt(fs->fs_mntops, "late") && onlylate) 358 continue; 359 if (hasopt(fs->fs_mntops, "late") && !late) 360 continue; 361 if (hasopt(fs->fs_mntops, "failok")) 362 failok = 1; 363 else 364 failok = 0; 365 if (!(init_flags & MNT_UPDATE) && 366 !hasopt(fs->fs_mntops, "update") && 367 ismounted(fs, mntbuf, mntsize)) 368 continue; 369 options = update_options(options, fs->fs_mntops, 370 mntbuf->f_flags); 371 if (mountfs(fs->fs_vfstype, fs->fs_spec, 372 fs->fs_file, init_flags, options, 373 fs->fs_mntops) && !failok) 374 rval = 1; 375 } 376 } else if (fstab_style) { 377 for (i = 0; i < mntsize; i++) { 378 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 379 continue; 380 putfsent(&mntbuf[i]); 381 } 382 } else { 383 for (i = 0; i < mntsize; i++) { 384 if (checkvfsname(mntbuf[i].f_fstypename, 385 vfslist)) 386 continue; 387 if (!verbose && 388 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 389 continue; 390 prmount(&mntbuf[i]); 391 } 392 } 393 exit(rval); 394 case 1: 395 if (vfslist != NULL) 396 usage(); 397 398 rmslashes(*argv, *argv); 399 if (init_flags & MNT_UPDATE) { 400 mntfromname = NULL; 401 have_fstab = 0; 402 if ((mntbuf = getmntpt(*argv)) == NULL) 403 errx(1, "not currently mounted %s", *argv); 404 /* 405 * Only get the mntflags from fstab if both mntpoint 406 * and mntspec are identical. Also handle the special 407 * case where just '/' is mounted and 'spec' is not 408 * identical with the one from fstab ('/dev' is missing 409 * in the spec-string at boot-time). 410 */ 411 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 412 if (strcmp(fs->fs_spec, 413 mntbuf->f_mntfromname) == 0 && 414 strcmp(fs->fs_file, 415 mntbuf->f_mntonname) == 0) { 416 have_fstab = 1; 417 mntfromname = mntbuf->f_mntfromname; 418 } else if (argv[0][0] == '/' && 419 argv[0][1] == '\0' && 420 strcmp(fs->fs_vfstype, 421 mntbuf->f_fstypename) == 0) { 422 fs = getfsfile("/"); 423 have_fstab = 1; 424 mntfromname = fs->fs_spec; 425 } 426 } 427 if (have_fstab) { 428 options = update_options(options, fs->fs_mntops, 429 mntbuf->f_flags); 430 } else { 431 mntfromname = mntbuf->f_mntfromname; 432 options = update_options(options, NULL, 433 mntbuf->f_flags); 434 } 435 rval = mountfs(mntbuf->f_fstypename, mntfromname, 436 mntbuf->f_mntonname, init_flags, options, 0); 437 break; 438 } 439 if ((fs = getfsfile(*argv)) == NULL && 440 (fs = getfsspec(*argv)) == NULL) 441 errx(1, "%s: unknown special file or file system", 442 *argv); 443 if (BADTYPE(fs->fs_type)) 444 errx(1, "%s has unknown file system type", 445 *argv); 446 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 447 init_flags, options, fs->fs_mntops); 448 break; 449 case 2: 450 /* 451 * If -t flag has not been specified, the path cannot be 452 * found, spec contains either a ':' or a '@', then assume 453 * that an NFS file system is being specified ala Sun. 454 * Check if the hostname contains only allowed characters 455 * to reduce false positives. IPv6 addresses containing 456 * ':' will be correctly parsed only if the separator is '@'. 457 * The definition of a valid hostname is taken from RFC 1034. 458 */ 459 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 460 (ep = strchr(argv[0], ':')) != NULL)) { 461 if (*ep == '@') { 462 cp = ep + 1; 463 ep = cp + strlen(cp); 464 } else 465 cp = argv[0]; 466 while (cp != ep) { 467 if (!isdigit(*cp) && !isalpha(*cp) && 468 *cp != '.' && *cp != '-' && *cp != ':') 469 break; 470 cp++; 471 } 472 if (cp == ep) 473 vfstype = "nfs"; 474 } 475 rval = mountfs(vfstype, 476 argv[0], argv[1], init_flags, options, NULL); 477 break; 478 default: 479 usage(); 480 /* NOTREACHED */ 481 } 482 483 /* 484 * If the mount was successfully, and done by root, tell mountd the 485 * good news. 486 */ 487 if (rval == 0 && getuid() == 0) 488 restart_mountd(); 489 490 exit(rval); 491 } 492 493 int 494 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 495 { 496 char realfsfile[PATH_MAX]; 497 int i; 498 499 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 500 /* the root file system can always be remounted */ 501 return (0); 502 503 /* The user may have specified a symlink in fstab, resolve the path */ 504 if (realpath(fs->fs_file, realfsfile) == NULL) { 505 /* Cannot resolve the path, use original one */ 506 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 507 } 508 509 /* 510 * Consider the filesystem to be mounted if: 511 * It has the same mountpoint as a mounted filesytem, and 512 * It has the same type as that same mounted filesystem, and 513 * It has the same device name as that same mounted filesystem, OR 514 * It is a nonremountable filesystem 515 */ 516 for (i = mntsize - 1; i >= 0; --i) 517 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 518 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 && 519 (!isremountable(fs->fs_vfstype) || 520 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))) 521 return (1); 522 return (0); 523 } 524 525 int 526 isremountable(const char *vfsname) 527 { 528 const char **cp; 529 530 for (cp = remountable_fs_names; *cp; cp++) 531 if (strcmp(*cp, vfsname) == 0) 532 return (1); 533 return (0); 534 } 535 536 int 537 hasopt(const char *mntopts, const char *option) 538 { 539 int negative, found; 540 char *opt, *optbuf; 541 542 if (option[0] == 'n' && option[1] == 'o') { 543 negative = 1; 544 option += 2; 545 } else 546 negative = 0; 547 optbuf = strdup(mntopts); 548 found = 0; 549 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 550 if (opt[0] == 'n' && opt[1] == 'o') { 551 if (!strcasecmp(opt + 2, option)) 552 found = negative; 553 } else if (!strcasecmp(opt, option)) 554 found = !negative; 555 } 556 free(optbuf); 557 return (found); 558 } 559 560 static void 561 append_arg(struct cpa *sa, char *arg) 562 { 563 if (sa->c + 1 == sa->sz) { 564 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 565 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz); 566 if (sa->a == NULL) 567 errx(1, "realloc failed"); 568 } 569 sa->a[++sa->c] = arg; 570 } 571 572 int 573 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 574 const char *options, const char *mntopts) 575 { 576 struct statfs sf; 577 int i, ret; 578 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 579 static struct cpa mnt_argv; 580 581 /* resolve the mountpoint with realpath(3) */ 582 if (checkpath(name, mntpath) != 0) { 583 warn("%s", mntpath); 584 return (1); 585 } 586 name = mntpath; 587 588 if (mntopts == NULL) 589 mntopts = ""; 590 optbuf = catopt(strdup(mntopts), options); 591 592 if (strcmp(name, "/") == 0) 593 flags |= MNT_UPDATE; 594 if (flags & MNT_FORCE) 595 optbuf = catopt(optbuf, "force"); 596 if (flags & MNT_RDONLY) 597 optbuf = catopt(optbuf, "ro"); 598 /* 599 * XXX 600 * The mount_mfs (newfs) command uses -o to select the 601 * optimization mode. We don't pass the default "-o rw" 602 * for that reason. 603 */ 604 if (flags & MNT_UPDATE) 605 optbuf = catopt(optbuf, "update"); 606 607 /* Compatibility glue. */ 608 if (strcmp(vfstype, "msdos") == 0) 609 vfstype = "msdosfs"; 610 611 /* Construct the name of the appropriate mount command */ 612 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 613 614 mnt_argv.c = -1; 615 append_arg(&mnt_argv, execname); 616 mangle(optbuf, &mnt_argv); 617 if (mountprog != NULL) 618 strlcpy(execname, mountprog, sizeof(execname)); 619 620 append_arg(&mnt_argv, strdup(spec)); 621 append_arg(&mnt_argv, strdup(name)); 622 append_arg(&mnt_argv, NULL); 623 624 if (debug) { 625 if (use_mountprog(vfstype)) 626 printf("exec: %s", execname); 627 else 628 printf("mount -t %s", vfstype); 629 for (i = 1; i < mnt_argv.c; i++) 630 (void)printf(" %s", mnt_argv.a[i]); 631 (void)printf("\n"); 632 free(optbuf); 633 free(mountprog); 634 mountprog = NULL; 635 return (0); 636 } 637 638 if (use_mountprog(vfstype)) { 639 ret = exec_mountprog(name, execname, mnt_argv.a); 640 } else { 641 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 642 } 643 644 free(optbuf); 645 free(mountprog); 646 mountprog = NULL; 647 648 if (verbose) { 649 if (statfs(name, &sf) < 0) { 650 warn("statfs %s", name); 651 return (1); 652 } 653 if (fstab_style) 654 putfsent(&sf); 655 else 656 prmount(&sf); 657 } 658 659 return (ret); 660 } 661 662 void 663 prmount(struct statfs *sfp) 664 { 665 uint64_t flags; 666 unsigned int i; 667 struct opt *o; 668 struct passwd *pw; 669 670 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 671 sfp->f_fstypename); 672 673 flags = sfp->f_flags & MNT_VISFLAGMASK; 674 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 675 if (flags & o->o_opt) { 676 (void)printf(", %s", o->o_name); 677 flags &= ~o->o_opt; 678 } 679 /* 680 * Inform when file system is mounted by an unprivileged user 681 * or privileged non-root user. 682 */ 683 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 684 (void)printf(", mounted by "); 685 if ((pw = getpwuid(sfp->f_owner)) != NULL) 686 (void)printf("%s", pw->pw_name); 687 else 688 (void)printf("%d", sfp->f_owner); 689 } 690 if (verbose) { 691 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 692 (void)printf(", writes: sync %ju async %ju", 693 (uintmax_t)sfp->f_syncwrites, 694 (uintmax_t)sfp->f_asyncwrites); 695 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 696 (void)printf(", reads: sync %ju async %ju", 697 (uintmax_t)sfp->f_syncreads, 698 (uintmax_t)sfp->f_asyncreads); 699 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 700 printf(", fsid "); 701 for (i = 0; i < sizeof(sfp->f_fsid); i++) 702 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 703 } 704 } 705 (void)printf(")\n"); 706 } 707 708 struct statfs * 709 getmntpt(const char *name) 710 { 711 struct statfs *mntbuf; 712 int i, mntsize; 713 714 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 715 for (i = mntsize - 1; i >= 0; i--) { 716 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 717 strcmp(mntbuf[i].f_mntonname, name) == 0) 718 return (&mntbuf[i]); 719 } 720 return (NULL); 721 } 722 723 char * 724 catopt(char *s0, const char *s1) 725 { 726 char *cp; 727 728 if (s1 == NULL || *s1 == '\0') 729 return (s0); 730 731 if (s0 && *s0) { 732 if (asprintf(&cp, "%s,%s", s0, s1) == -1) 733 errx(1, "asprintf failed"); 734 } else 735 cp = strdup(s1); 736 737 if (s0) 738 free(s0); 739 return (cp); 740 } 741 742 void 743 mangle(char *options, struct cpa *a) 744 { 745 char *p, *s, *val; 746 747 for (s = options; (p = strsep(&s, ",")) != NULL;) 748 if (*p != '\0') { 749 if (strcmp(p, "noauto") == 0) { 750 /* 751 * Do not pass noauto option to nmount(). 752 * or external mount program. noauto is 753 * only used to prevent mounting a filesystem 754 * when 'mount -a' is specified, and is 755 * not a real mount option. 756 */ 757 continue; 758 } else if (strcmp(p, "late") == 0) { 759 /* 760 * "late" is used to prevent certain file 761 * systems from being mounted before late 762 * in the boot cycle; for instance, 763 * loopback NFS mounts can't be mounted 764 * before mountd starts. 765 */ 766 continue; 767 } else if (strcmp(p, "failok") == 0) { 768 /* 769 * "failok" is used to prevent certain file 770 * systems from being causing the system to 771 * drop into single user mode in the boot 772 * cycle, and is not a real mount option. 773 */ 774 continue; 775 } else if (strncmp(p, "mountprog", 9) == 0) { 776 /* 777 * "mountprog" is used to force the use of 778 * userland mount programs. 779 */ 780 val = strchr(p, '='); 781 if (val != NULL) { 782 ++val; 783 if (*val != '\0') 784 mountprog = strdup(val); 785 } 786 787 if (mountprog == NULL) { 788 errx(1, "Need value for -o mountprog"); 789 } 790 continue; 791 } else if (strcmp(p, "userquota") == 0) { 792 continue; 793 } else if (strncmp(p, userquotaeq, 794 sizeof(userquotaeq) - 1) == 0) { 795 continue; 796 } else if (strcmp(p, "groupquota") == 0) { 797 continue; 798 } else if (strncmp(p, groupquotaeq, 799 sizeof(groupquotaeq) - 1) == 0) { 800 continue; 801 } else if (*p == '-') { 802 append_arg(a, p); 803 p = strchr(p, '='); 804 if (p != NULL) { 805 *p = '\0'; 806 append_arg(a, p + 1); 807 } 808 } else { 809 append_arg(a, strdup("-o")); 810 append_arg(a, p); 811 } 812 } 813 } 814 815 816 char * 817 update_options(char *opts, char *fstab, int curflags) 818 { 819 char *o, *p; 820 char *cur; 821 char *expopt, *newopt, *tmpopt; 822 823 if (opts == NULL) 824 return (strdup("")); 825 826 /* remove meta options from list */ 827 remopt(fstab, MOUNT_META_OPTION_FSTAB); 828 remopt(fstab, MOUNT_META_OPTION_CURRENT); 829 cur = flags2opts(curflags); 830 831 /* 832 * Expand all meta-options passed to us first. 833 */ 834 expopt = NULL; 835 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 836 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 837 expopt = catopt(expopt, fstab); 838 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 839 expopt = catopt(expopt, cur); 840 else 841 expopt = catopt(expopt, o); 842 } 843 free(cur); 844 free(opts); 845 846 /* 847 * Remove previous contradictory arguments. Given option "foo" we 848 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 849 * and "foo" - so we can deal with possible options like "notice". 850 */ 851 newopt = NULL; 852 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 853 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 854 errx(1, "malloc failed"); 855 856 strcpy(tmpopt, "no"); 857 strcat(tmpopt, o); 858 remopt(newopt, tmpopt); 859 free(tmpopt); 860 861 if (strncmp("no", o, 2) == 0) 862 remopt(newopt, o+2); 863 864 newopt = catopt(newopt, o); 865 } 866 free(expopt); 867 868 return (newopt); 869 } 870 871 void 872 remopt(char *string, const char *opt) 873 { 874 char *o, *p, *r; 875 876 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 877 return; 878 879 r = string; 880 881 for (p = string; (o = strsep(&p, ",")) != NULL;) { 882 if (strcmp(opt, o) != 0) { 883 if (*r == ',' && *o != '\0') 884 r++; 885 while ((*r++ = *o++) != '\0') 886 ; 887 *--r = ','; 888 } 889 } 890 *r = '\0'; 891 } 892 893 void 894 usage(void) 895 { 896 897 (void)fprintf(stderr, "%s\n%s\n%s\n", 898 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 899 " mount [-dfpruvw] special | node", 900 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 901 exit(1); 902 } 903 904 void 905 putfsent(struct statfs *ent) 906 { 907 struct fstab *fst; 908 char *opts, *rw; 909 int l; 910 911 opts = NULL; 912 /* flags2opts() doesn't return the "rw" option. */ 913 if ((ent->f_flags & MNT_RDONLY) != 0) 914 rw = NULL; 915 else 916 rw = catopt(NULL, "rw"); 917 918 opts = flags2opts(ent->f_flags); 919 opts = catopt(rw, opts); 920 921 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 922 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 923 strlcpy(ent->f_mntfromname, 924 (strnstr(ent->f_mntfromname, ":", 8) +1), 925 sizeof(ent->f_mntfromname)); 926 } 927 928 l = strlen(ent->f_mntfromname); 929 printf("%s%s%s%s", ent->f_mntfromname, 930 l < 8 ? "\t" : "", 931 l < 16 ? "\t" : "", 932 l < 24 ? "\t" : " "); 933 l = strlen(ent->f_mntonname); 934 printf("%s%s%s%s", ent->f_mntonname, 935 l < 8 ? "\t" : "", 936 l < 16 ? "\t" : "", 937 l < 24 ? "\t" : " "); 938 printf("%s\t", ent->f_fstypename); 939 l = strlen(opts); 940 printf("%s%s", opts, 941 l < 8 ? "\t" : " "); 942 free(opts); 943 944 if ((fst = getfsspec(ent->f_mntfromname))) 945 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 946 else if ((fst = getfsfile(ent->f_mntonname))) 947 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 948 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 949 if (strcmp(ent->f_mntonname, "/") == 0) 950 printf("\t1 1\n"); 951 else 952 printf("\t2 2\n"); 953 } else 954 printf("\t0 0\n"); 955 } 956 957 958 char * 959 flags2opts(int flags) 960 { 961 char *res; 962 963 res = NULL; 964 965 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 966 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 967 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 968 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 969 if (flags & MNT_UNION) res = catopt(res, "union"); 970 if (flags & MNT_ASYNC) res = catopt(res, "async"); 971 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 972 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 973 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 974 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 975 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 976 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 977 if (flags & MNT_ACLS) res = catopt(res, "acls"); 978 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 979 if (flags & MNT_UNTRUSTED) res = catopt(res, "untrusted"); 980 if (flags & MNT_NOCOVER) res = catopt(res, "nocover"); 981 if (flags & MNT_EMPTYDIR) res = catopt(res, "emptydir"); 982 983 return (res); 984 } 985