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