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