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 !hasopt(fs->fs_mntops, "update") && 365 ismounted(fs, mntbuf, mntsize)) 366 continue; 367 options = update_options(options, fs->fs_mntops, 368 mntbuf->f_flags); 369 if (mountfs(fs->fs_vfstype, fs->fs_spec, 370 fs->fs_file, init_flags, options, 371 fs->fs_mntops) && !failok) 372 rval = 1; 373 } 374 } else if (fstab_style) { 375 for (i = 0; i < mntsize; i++) { 376 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 377 continue; 378 putfsent(&mntbuf[i]); 379 } 380 } else { 381 for (i = 0; i < mntsize; i++) { 382 if (checkvfsname(mntbuf[i].f_fstypename, 383 vfslist)) 384 continue; 385 if (!verbose && 386 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 387 continue; 388 prmount(&mntbuf[i]); 389 } 390 } 391 exit(rval); 392 case 1: 393 if (vfslist != NULL) 394 usage(); 395 396 rmslashes(*argv, *argv); 397 if (init_flags & MNT_UPDATE) { 398 mntfromname = NULL; 399 have_fstab = 0; 400 if ((mntbuf = getmntpt(*argv)) == NULL) 401 errx(1, "not currently mounted %s", *argv); 402 /* 403 * Only get the mntflags from fstab if both mntpoint 404 * and mntspec are identical. Also handle the special 405 * case where just '/' is mounted and 'spec' is not 406 * identical with the one from fstab ('/dev' is missing 407 * in the spec-string at boot-time). 408 */ 409 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 410 if (strcmp(fs->fs_spec, 411 mntbuf->f_mntfromname) == 0 && 412 strcmp(fs->fs_file, 413 mntbuf->f_mntonname) == 0) { 414 have_fstab = 1; 415 mntfromname = mntbuf->f_mntfromname; 416 } else if (argv[0][0] == '/' && 417 argv[0][1] == '\0' && 418 strcmp(fs->fs_vfstype, 419 mntbuf->f_fstypename) == 0) { 420 fs = getfsfile("/"); 421 have_fstab = 1; 422 mntfromname = fs->fs_spec; 423 } 424 } 425 if (have_fstab) { 426 options = update_options(options, fs->fs_mntops, 427 mntbuf->f_flags); 428 } else { 429 mntfromname = mntbuf->f_mntfromname; 430 options = update_options(options, NULL, 431 mntbuf->f_flags); 432 } 433 rval = mountfs(mntbuf->f_fstypename, mntfromname, 434 mntbuf->f_mntonname, init_flags, options, 0); 435 break; 436 } 437 if ((fs = getfsfile(*argv)) == NULL && 438 (fs = getfsspec(*argv)) == NULL) 439 errx(1, "%s: unknown special file or file system", 440 *argv); 441 if (BADTYPE(fs->fs_type)) 442 errx(1, "%s has unknown file system type", 443 *argv); 444 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 445 init_flags, options, fs->fs_mntops); 446 break; 447 case 2: 448 /* 449 * If -t flag has not been specified, the path cannot be 450 * found, spec contains either a ':' or a '@', then assume 451 * that an NFS file system is being specified ala Sun. 452 * Check if the hostname contains only allowed characters 453 * to reduce false positives. IPv6 addresses containing 454 * ':' will be correctly parsed only if the separator is '@'. 455 * The definition of a valid hostname is taken from RFC 1034. 456 */ 457 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 458 (ep = strchr(argv[0], ':')) != NULL)) { 459 if (*ep == '@') { 460 cp = ep + 1; 461 ep = cp + strlen(cp); 462 } else 463 cp = argv[0]; 464 while (cp != ep) { 465 if (!isdigit(*cp) && !isalpha(*cp) && 466 *cp != '.' && *cp != '-' && *cp != ':') 467 break; 468 cp++; 469 } 470 if (cp == ep) 471 vfstype = "nfs"; 472 } 473 rval = mountfs(vfstype, 474 argv[0], argv[1], init_flags, options, NULL); 475 break; 476 default: 477 usage(); 478 /* NOTREACHED */ 479 } 480 481 /* 482 * If the mount was successfully, and done by root, tell mountd the 483 * good news. 484 */ 485 if (rval == 0 && getuid() == 0) 486 restart_mountd(); 487 488 exit(rval); 489 } 490 491 int 492 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 493 { 494 char realfsfile[PATH_MAX]; 495 int i; 496 497 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 498 /* the root file system can always be remounted */ 499 return (0); 500 501 /* The user may have specified a symlink in fstab, resolve the path */ 502 if (realpath(fs->fs_file, realfsfile) == NULL) { 503 /* Cannot resolve the path, use original one */ 504 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 505 } 506 507 /* 508 * Consider the filesystem to be mounted if: 509 * It has the same mountpoint as a mounted filesytem, and 510 * It has the same type as that same mounted filesystem, and 511 * It has the same device name as that same mounted filesystem, OR 512 * It is a nonremountable filesystem 513 */ 514 for (i = mntsize - 1; i >= 0; --i) 515 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 516 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 && 517 (!isremountable(fs->fs_vfstype) || 518 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))) 519 return (1); 520 return (0); 521 } 522 523 int 524 isremountable(const char *vfsname) 525 { 526 const char **cp; 527 528 for (cp = remountable_fs_names; *cp; cp++) 529 if (strcmp(*cp, vfsname) == 0) 530 return (1); 531 return (0); 532 } 533 534 int 535 hasopt(const char *mntopts, const char *option) 536 { 537 int negative, found; 538 char *opt, *optbuf; 539 540 if (option[0] == 'n' && option[1] == 'o') { 541 negative = 1; 542 option += 2; 543 } else 544 negative = 0; 545 optbuf = strdup(mntopts); 546 found = 0; 547 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 548 if (opt[0] == 'n' && opt[1] == 'o') { 549 if (!strcasecmp(opt + 2, option)) 550 found = negative; 551 } else if (!strcasecmp(opt, option)) 552 found = !negative; 553 } 554 free(optbuf); 555 return (found); 556 } 557 558 static void 559 append_arg(struct cpa *sa, char *arg) 560 { 561 if (sa->c + 1 == sa->sz) { 562 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 563 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz); 564 if (sa->a == NULL) 565 errx(1, "realloc failed"); 566 } 567 sa->a[++sa->c] = arg; 568 } 569 570 int 571 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 572 const char *options, const char *mntopts) 573 { 574 struct statfs sf; 575 int i, ret; 576 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 577 static struct cpa mnt_argv; 578 579 /* resolve the mountpoint with realpath(3) */ 580 if (checkpath(name, mntpath) != 0) { 581 warn("%s", mntpath); 582 return (1); 583 } 584 name = mntpath; 585 586 if (mntopts == NULL) 587 mntopts = ""; 588 optbuf = catopt(strdup(mntopts), options); 589 590 if (strcmp(name, "/") == 0) 591 flags |= MNT_UPDATE; 592 if (flags & MNT_FORCE) 593 optbuf = catopt(optbuf, "force"); 594 if (flags & MNT_RDONLY) 595 optbuf = catopt(optbuf, "ro"); 596 /* 597 * XXX 598 * The mount_mfs (newfs) command uses -o to select the 599 * optimization mode. We don't pass the default "-o rw" 600 * for that reason. 601 */ 602 if (flags & MNT_UPDATE) 603 optbuf = catopt(optbuf, "update"); 604 605 /* Compatibility glue. */ 606 if (strcmp(vfstype, "msdos") == 0) 607 vfstype = "msdosfs"; 608 609 /* Construct the name of the appropriate mount command */ 610 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 611 612 mnt_argv.c = -1; 613 append_arg(&mnt_argv, execname); 614 mangle(optbuf, &mnt_argv); 615 if (mountprog != NULL) 616 strlcpy(execname, mountprog, sizeof(execname)); 617 618 append_arg(&mnt_argv, strdup(spec)); 619 append_arg(&mnt_argv, strdup(name)); 620 append_arg(&mnt_argv, NULL); 621 622 if (debug) { 623 if (use_mountprog(vfstype)) 624 printf("exec: %s", execname); 625 else 626 printf("mount -t %s", vfstype); 627 for (i = 1; i < mnt_argv.c; i++) 628 (void)printf(" %s", mnt_argv.a[i]); 629 (void)printf("\n"); 630 free(optbuf); 631 free(mountprog); 632 mountprog = NULL; 633 return (0); 634 } 635 636 if (use_mountprog(vfstype)) { 637 ret = exec_mountprog(name, execname, mnt_argv.a); 638 } else { 639 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 640 } 641 642 free(optbuf); 643 free(mountprog); 644 mountprog = NULL; 645 646 if (verbose) { 647 if (statfs(name, &sf) < 0) { 648 warn("statfs %s", name); 649 return (1); 650 } 651 if (fstab_style) 652 putfsent(&sf); 653 else 654 prmount(&sf); 655 } 656 657 return (ret); 658 } 659 660 void 661 prmount(struct statfs *sfp) 662 { 663 uint64_t flags; 664 unsigned int i; 665 struct opt *o; 666 struct passwd *pw; 667 668 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 669 sfp->f_fstypename); 670 671 flags = sfp->f_flags & MNT_VISFLAGMASK; 672 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 673 if (flags & o->o_opt) { 674 (void)printf(", %s", o->o_name); 675 flags &= ~o->o_opt; 676 } 677 /* 678 * Inform when file system is mounted by an unprivileged user 679 * or privileged non-root user. 680 */ 681 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 682 (void)printf(", mounted by "); 683 if ((pw = getpwuid(sfp->f_owner)) != NULL) 684 (void)printf("%s", pw->pw_name); 685 else 686 (void)printf("%d", sfp->f_owner); 687 } 688 if (verbose) { 689 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 690 (void)printf(", writes: sync %ju async %ju", 691 (uintmax_t)sfp->f_syncwrites, 692 (uintmax_t)sfp->f_asyncwrites); 693 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 694 (void)printf(", reads: sync %ju async %ju", 695 (uintmax_t)sfp->f_syncreads, 696 (uintmax_t)sfp->f_asyncreads); 697 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 698 printf(", fsid "); 699 for (i = 0; i < sizeof(sfp->f_fsid); i++) 700 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 701 } 702 } 703 (void)printf(")\n"); 704 } 705 706 struct statfs * 707 getmntpt(const char *name) 708 { 709 struct statfs *mntbuf; 710 int i, mntsize; 711 712 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 713 for (i = mntsize - 1; i >= 0; i--) { 714 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 715 strcmp(mntbuf[i].f_mntonname, name) == 0) 716 return (&mntbuf[i]); 717 } 718 return (NULL); 719 } 720 721 char * 722 catopt(char *s0, const char *s1) 723 { 724 char *cp; 725 726 if (s1 == NULL || *s1 == '\0') 727 return (s0); 728 729 if (s0 && *s0) { 730 if (asprintf(&cp, "%s,%s", s0, s1) == -1) 731 errx(1, "asprintf failed"); 732 } else 733 cp = strdup(s1); 734 735 if (s0) 736 free(s0); 737 return (cp); 738 } 739 740 void 741 mangle(char *options, struct cpa *a) 742 { 743 char *p, *s, *val; 744 745 for (s = options; (p = strsep(&s, ",")) != NULL;) 746 if (*p != '\0') { 747 if (strcmp(p, "noauto") == 0) { 748 /* 749 * Do not pass noauto option to nmount(). 750 * or external mount program. noauto is 751 * only used to prevent mounting a filesystem 752 * when 'mount -a' is specified, and is 753 * not a real mount option. 754 */ 755 continue; 756 } else if (strcmp(p, "late") == 0) { 757 /* 758 * "late" is used to prevent certain file 759 * systems from being mounted before late 760 * in the boot cycle; for instance, 761 * loopback NFS mounts can't be mounted 762 * before mountd starts. 763 */ 764 continue; 765 } else if (strcmp(p, "failok") == 0) { 766 /* 767 * "failok" is used to prevent certain file 768 * systems from being causing the system to 769 * drop into single user mode in the boot 770 * cycle, and is not a real mount option. 771 */ 772 continue; 773 } else if (strncmp(p, "mountprog", 9) == 0) { 774 /* 775 * "mountprog" is used to force the use of 776 * userland mount programs. 777 */ 778 val = strchr(p, '='); 779 if (val != NULL) { 780 ++val; 781 if (*val != '\0') 782 mountprog = strdup(val); 783 } 784 785 if (mountprog == NULL) { 786 errx(1, "Need value for -o mountprog"); 787 } 788 continue; 789 } else if (strcmp(p, "userquota") == 0) { 790 continue; 791 } else if (strncmp(p, userquotaeq, 792 sizeof(userquotaeq) - 1) == 0) { 793 continue; 794 } else if (strcmp(p, "groupquota") == 0) { 795 continue; 796 } else if (strncmp(p, groupquotaeq, 797 sizeof(groupquotaeq) - 1) == 0) { 798 continue; 799 } else if (*p == '-') { 800 append_arg(a, p); 801 p = strchr(p, '='); 802 if (p != NULL) { 803 *p = '\0'; 804 append_arg(a, p + 1); 805 } 806 } else { 807 append_arg(a, strdup("-o")); 808 append_arg(a, p); 809 } 810 } 811 } 812 813 814 char * 815 update_options(char *opts, char *fstab, int curflags) 816 { 817 char *o, *p; 818 char *cur; 819 char *expopt, *newopt, *tmpopt; 820 821 if (opts == NULL) 822 return (strdup("")); 823 824 /* remove meta options from list */ 825 remopt(fstab, MOUNT_META_OPTION_FSTAB); 826 remopt(fstab, MOUNT_META_OPTION_CURRENT); 827 cur = flags2opts(curflags); 828 829 /* 830 * Expand all meta-options passed to us first. 831 */ 832 expopt = NULL; 833 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 834 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 835 expopt = catopt(expopt, fstab); 836 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 837 expopt = catopt(expopt, cur); 838 else 839 expopt = catopt(expopt, o); 840 } 841 free(cur); 842 free(opts); 843 844 /* 845 * Remove previous contradictory arguments. Given option "foo" we 846 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 847 * and "foo" - so we can deal with possible options like "notice". 848 */ 849 newopt = NULL; 850 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 851 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 852 errx(1, "malloc failed"); 853 854 strcpy(tmpopt, "no"); 855 strcat(tmpopt, o); 856 remopt(newopt, tmpopt); 857 free(tmpopt); 858 859 if (strncmp("no", o, 2) == 0) 860 remopt(newopt, o+2); 861 862 newopt = catopt(newopt, o); 863 } 864 free(expopt); 865 866 return (newopt); 867 } 868 869 void 870 remopt(char *string, const char *opt) 871 { 872 char *o, *p, *r; 873 874 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 875 return; 876 877 r = string; 878 879 for (p = string; (o = strsep(&p, ",")) != NULL;) { 880 if (strcmp(opt, o) != 0) { 881 if (*r == ',' && *o != '\0') 882 r++; 883 while ((*r++ = *o++) != '\0') 884 ; 885 *--r = ','; 886 } 887 } 888 *r = '\0'; 889 } 890 891 void 892 usage(void) 893 { 894 895 (void)fprintf(stderr, "%s\n%s\n%s\n", 896 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 897 " mount [-dfpruvw] special | node", 898 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 899 exit(1); 900 } 901 902 void 903 putfsent(struct statfs *ent) 904 { 905 struct fstab *fst; 906 char *opts, *rw; 907 int l; 908 909 opts = NULL; 910 /* flags2opts() doesn't return the "rw" option. */ 911 if ((ent->f_flags & MNT_RDONLY) != 0) 912 rw = NULL; 913 else 914 rw = catopt(NULL, "rw"); 915 916 opts = flags2opts(ent->f_flags); 917 opts = catopt(rw, opts); 918 919 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 920 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 921 strlcpy(ent->f_mntfromname, 922 (strnstr(ent->f_mntfromname, ":", 8) +1), 923 sizeof(ent->f_mntfromname)); 924 } 925 926 l = strlen(ent->f_mntfromname); 927 printf("%s%s%s%s", ent->f_mntfromname, 928 l < 8 ? "\t" : "", 929 l < 16 ? "\t" : "", 930 l < 24 ? "\t" : " "); 931 l = strlen(ent->f_mntonname); 932 printf("%s%s%s%s", ent->f_mntonname, 933 l < 8 ? "\t" : "", 934 l < 16 ? "\t" : "", 935 l < 24 ? "\t" : " "); 936 printf("%s\t", ent->f_fstypename); 937 l = strlen(opts); 938 printf("%s%s", opts, 939 l < 8 ? "\t" : " "); 940 free(opts); 941 942 if ((fst = getfsspec(ent->f_mntfromname))) 943 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 944 else if ((fst = getfsfile(ent->f_mntonname))) 945 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 946 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 947 if (strcmp(ent->f_mntonname, "/") == 0) 948 printf("\t1 1\n"); 949 else 950 printf("\t2 2\n"); 951 } else 952 printf("\t0 0\n"); 953 } 954 955 956 char * 957 flags2opts(int flags) 958 { 959 char *res; 960 961 res = NULL; 962 963 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 964 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 965 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 966 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 967 if (flags & MNT_UNION) res = catopt(res, "union"); 968 if (flags & MNT_ASYNC) res = catopt(res, "async"); 969 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 970 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 971 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 972 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 973 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 974 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 975 if (flags & MNT_ACLS) res = catopt(res, "acls"); 976 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 977 if (flags & MNT_UNTRUSTED) res = catopt(res, "untrusted"); 978 979 return (res); 980 } 981