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 #define _WANT_MNTOPTNAMES 46 #include <sys/mount.h> 47 #include <sys/stat.h> 48 #include <sys/wait.h> 49 50 #include <ctype.h> 51 #include <err.h> 52 #include <errno.h> 53 #include <fstab.h> 54 #include <paths.h> 55 #include <pwd.h> 56 #include <signal.h> 57 #include <stdint.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 #include <libutil.h> 63 #include <libxo/xo.h> 64 65 #include "extern.h" 66 #include "mntopts.h" 67 #include "pathnames.h" 68 69 #define EXIT(a) { \ 70 xo_close_container("mount"); \ 71 xo_finish(); \ 72 exit(a); \ 73 } 74 75 /* `meta' options */ 76 #define MOUNT_META_OPTION_FSTAB "fstab" 77 #define MOUNT_META_OPTION_CURRENT "current" 78 79 static int debug, fstab_style, verbose; 80 81 struct cpa { 82 char **a; 83 ssize_t sz; 84 int c; 85 }; 86 87 char *catopt(char *, const char *); 88 struct statfs *getmntpt(const char *); 89 int hasopt(const char *, const char *); 90 int ismounted(struct fstab *, struct statfs *, int); 91 int isremountable(const char *); 92 void mangle(char *, struct cpa *); 93 char *update_options(char *, char *, int); 94 int mountfs(const char *, const char *, const char *, 95 int, const char *, const char *); 96 void remopt(char *, const char *); 97 void prmount(struct statfs *); 98 void putfsent(struct statfs *); 99 void usage(void); 100 char *flags2opts(int); 101 102 /* Map from mount options to printable formats. */ 103 static struct mntoptnames optnames[] = { 104 MNTOPT_NAMES 105 }; 106 107 /* 108 * List of VFS types that can be remounted without becoming mounted on top 109 * of each other. 110 * XXX Is this list correct? 111 */ 112 static const char * 113 remountable_fs_names[] = { 114 "ufs", "ffs", "ext2fs", 115 0 116 }; 117 118 static const char userquotaeq[] = "userquota="; 119 static const char groupquotaeq[] = "groupquota="; 120 121 static char *mountprog = NULL; 122 123 static int 124 use_mountprog(const char *vfstype) 125 { 126 /* XXX: We need to get away from implementing external mount 127 * programs for every filesystem, and move towards having 128 * each filesystem properly implement the nmount() system call. 129 */ 130 unsigned int i; 131 const char *fs[] = { 132 "cd9660", "mfs", "msdosfs", "nfs", 133 "nullfs", "smbfs", "udf", "unionfs", 134 NULL 135 }; 136 137 if (mountprog != NULL) 138 return (1); 139 140 for (i = 0; fs[i] != NULL; ++i) { 141 if (strcmp(vfstype, fs[i]) == 0) 142 return (1); 143 } 144 145 return (0); 146 } 147 148 static int 149 exec_mountprog(const char *name, const char *execname, char *const argv[]) 150 { 151 pid_t pid; 152 int status; 153 154 switch (pid = fork()) { 155 case -1: /* Error. */ 156 xo_warn("fork"); 157 EXIT(1); 158 case 0: /* Child. */ 159 /* Go find an executable. */ 160 execvP(execname, _PATH_SYSPATH, argv); 161 if (errno == ENOENT) { 162 xo_warn("exec %s not found", execname); 163 if (execname[0] != '/') { 164 xo_warnx("in path: %s", _PATH_SYSPATH); 165 } 166 } 167 EXIT(1); 168 default: /* Parent. */ 169 if (waitpid(pid, &status, 0) < 0) { 170 xo_warn("waitpid"); 171 return (1); 172 } 173 174 if (WIFEXITED(status)) { 175 if (WEXITSTATUS(status) != 0) 176 return (WEXITSTATUS(status)); 177 } else if (WIFSIGNALED(status)) { 178 xo_warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 179 return (1); 180 } 181 break; 182 } 183 184 return (0); 185 } 186 187 static int 188 specified_ro(const char *arg) 189 { 190 char *optbuf, *opt; 191 int ret = 0; 192 193 optbuf = strdup(arg); 194 if (optbuf == NULL) 195 xo_err(1, "strdup failed"); 196 197 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 198 if (strcmp(opt, "ro") == 0) { 199 ret = 1; 200 break; 201 } 202 } 203 free(optbuf); 204 return (ret); 205 } 206 207 static void 208 restart_mountd(void) 209 { 210 struct pidfh *pfh; 211 pid_t mountdpid; 212 213 mountdpid = 0; 214 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 215 if (pfh != NULL) { 216 /* Mountd is not running. */ 217 pidfile_remove(pfh); 218 return; 219 } 220 if (errno != EEXIST) { 221 /* Cannot open pidfile for some reason. */ 222 return; 223 } 224 225 /* 226 * Refuse to send broadcast or group signals, this has 227 * happened due to the bugs in pidfile(3). 228 */ 229 if (mountdpid <= 0) { 230 xo_warnx("mountd pid %d, refusing to send SIGHUP", mountdpid); 231 return; 232 } 233 234 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 235 if (kill(mountdpid, SIGHUP) == -1) 236 xo_err(1, "signal mountd"); 237 } 238 239 int 240 main(int argc, char *argv[]) 241 { 242 const char *mntfromname, **vfslist, *vfstype; 243 struct fstab *fs; 244 struct statfs *mntbuf; 245 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro; 246 int onlylate; 247 char *cp, *ep, *options; 248 249 all = init_flags = late = onlylate = 0; 250 ro = 0; 251 options = NULL; 252 vfslist = NULL; 253 vfstype = "ufs"; 254 255 argc = xo_parse_args(argc, argv); 256 if (argc < 0) 257 exit(1); 258 xo_open_container("mount"); 259 260 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1) 261 switch (ch) { 262 case 'a': 263 all = 1; 264 break; 265 case 'd': 266 debug = 1; 267 break; 268 case 'F': 269 setfstab(optarg); 270 break; 271 case 'f': 272 init_flags |= MNT_FORCE; 273 break; 274 case 'L': 275 onlylate = 1; 276 late = 1; 277 break; 278 case 'l': 279 late = 1; 280 break; 281 case 'n': 282 /* For compatibility with the Linux version of mount. */ 283 break; 284 case 'o': 285 if (*optarg) { 286 options = catopt(options, optarg); 287 if (specified_ro(optarg)) 288 ro = 1; 289 } 290 break; 291 case 'p': 292 fstab_style = 1; 293 verbose = 1; 294 break; 295 case 'r': 296 options = catopt(options, "ro"); 297 ro = 1; 298 break; 299 case 't': 300 if (vfslist != NULL) 301 xo_errx(1, "only one -t option may be specified"); 302 vfslist = makevfslist(optarg); 303 vfstype = optarg; 304 break; 305 case 'u': 306 init_flags |= MNT_UPDATE; 307 break; 308 case 'v': 309 verbose = 1; 310 break; 311 case 'w': 312 options = catopt(options, "noro"); 313 break; 314 case '?': 315 default: 316 usage(); 317 /* NOTREACHED */ 318 } 319 argc -= optind; 320 argv += optind; 321 322 #define BADTYPE(type) \ 323 (strcmp(type, FSTAB_RO) && \ 324 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 325 326 if ((init_flags & MNT_UPDATE) && (ro == 0)) 327 options = catopt(options, "noro"); 328 329 rval = 0; 330 switch (argc) { 331 case 0: 332 if ((mntsize = getmntinfo(&mntbuf, 333 verbose ? MNT_WAIT : MNT_NOWAIT)) == 0) 334 xo_err(1, "getmntinfo"); 335 if (all) { 336 while ((fs = getfsent()) != NULL) { 337 if (BADTYPE(fs->fs_type)) 338 continue; 339 if (checkvfsname(fs->fs_vfstype, vfslist)) 340 continue; 341 if (hasopt(fs->fs_mntops, "noauto")) 342 continue; 343 if (!hasopt(fs->fs_mntops, "late") && onlylate) 344 continue; 345 if (hasopt(fs->fs_mntops, "late") && !late) 346 continue; 347 if (hasopt(fs->fs_mntops, "failok")) 348 failok = 1; 349 else 350 failok = 0; 351 if (!(init_flags & MNT_UPDATE) && 352 !hasopt(fs->fs_mntops, "update") && 353 ismounted(fs, mntbuf, mntsize)) 354 continue; 355 options = update_options(options, fs->fs_mntops, 356 mntbuf->f_flags); 357 if (mountfs(fs->fs_vfstype, fs->fs_spec, 358 fs->fs_file, init_flags, options, 359 fs->fs_mntops) && !failok) 360 rval = 1; 361 } 362 } else if (fstab_style) { 363 xo_open_list("fstab"); 364 for (i = 0; i < mntsize; i++) { 365 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 366 continue; 367 xo_open_instance("fstab"); 368 putfsent(&mntbuf[i]); 369 xo_close_instance("fstab"); 370 } 371 xo_close_list("fstab"); 372 } else { 373 xo_open_list("mounted"); 374 for (i = 0; i < mntsize; i++) { 375 if (checkvfsname(mntbuf[i].f_fstypename, 376 vfslist)) 377 continue; 378 if (!verbose && 379 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 380 continue; 381 xo_open_instance("mounted"); 382 prmount(&mntbuf[i]); 383 xo_close_instance("mounted"); 384 } 385 xo_close_list("mounted"); 386 } 387 EXIT(rval); 388 case 1: 389 if (vfslist != NULL) 390 usage(); 391 392 rmslashes(*argv, *argv); 393 if (init_flags & MNT_UPDATE) { 394 mntfromname = NULL; 395 have_fstab = 0; 396 if ((mntbuf = getmntpt(*argv)) == NULL) 397 xo_errx(1, "not currently mounted %s", *argv); 398 /* 399 * Only get the mntflags from fstab if both mntpoint 400 * and mntspec are identical. Also handle the special 401 * case where just '/' is mounted and 'spec' is not 402 * identical with the one from fstab ('/dev' is missing 403 * in the spec-string at boot-time). 404 */ 405 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 406 if (strcmp(fs->fs_spec, 407 mntbuf->f_mntfromname) == 0 && 408 strcmp(fs->fs_file, 409 mntbuf->f_mntonname) == 0) { 410 have_fstab = 1; 411 mntfromname = mntbuf->f_mntfromname; 412 } else if (argv[0][0] == '/' && 413 argv[0][1] == '\0' && 414 strcmp(fs->fs_vfstype, 415 mntbuf->f_fstypename) == 0) { 416 fs = getfsfile("/"); 417 have_fstab = 1; 418 mntfromname = fs->fs_spec; 419 } 420 } 421 if (have_fstab) { 422 options = update_options(options, fs->fs_mntops, 423 mntbuf->f_flags); 424 } else { 425 mntfromname = mntbuf->f_mntfromname; 426 options = update_options(options, NULL, 427 mntbuf->f_flags); 428 } 429 rval = mountfs(mntbuf->f_fstypename, mntfromname, 430 mntbuf->f_mntonname, init_flags, options, 0); 431 break; 432 } 433 if ((fs = getfsfile(*argv)) == NULL && 434 (fs = getfsspec(*argv)) == NULL) 435 xo_errx(1, "%s: unknown special file or file system", 436 *argv); 437 if (BADTYPE(fs->fs_type)) 438 xo_errx(1, "%s has unknown file system type", 439 *argv); 440 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 441 init_flags, options, fs->fs_mntops); 442 break; 443 case 2: 444 /* 445 * If -t flag has not been specified, the path cannot be 446 * found, spec contains either a ':' or a '@', then assume 447 * that an NFS file system is being specified ala Sun. 448 * Check if the hostname contains only allowed characters 449 * to reduce false positives. IPv6 addresses containing 450 * ':' will be correctly parsed only if the separator is '@'. 451 * The definition of a valid hostname is taken from RFC 1034. 452 */ 453 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 454 (ep = strchr(argv[0], ':')) != NULL)) { 455 if (*ep == '@') { 456 cp = ep + 1; 457 ep = cp + strlen(cp); 458 } else 459 cp = argv[0]; 460 while (cp != ep) { 461 if (!isdigit(*cp) && !isalpha(*cp) && 462 *cp != '.' && *cp != '-' && *cp != ':') 463 break; 464 cp++; 465 } 466 if (cp == ep) 467 vfstype = "nfs"; 468 } 469 rval = mountfs(vfstype, 470 argv[0], argv[1], init_flags, options, NULL); 471 break; 472 default: 473 usage(); 474 /* NOTREACHED */ 475 } 476 477 /* 478 * If the mount was successfully, and done by root, tell mountd the 479 * good news. 480 */ 481 if (rval == 0 && getuid() == 0) 482 restart_mountd(); 483 484 EXIT(rval); 485 } 486 487 int 488 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 489 { 490 char realfsfile[PATH_MAX]; 491 int i; 492 493 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 494 /* the root file system can always be remounted */ 495 return (0); 496 497 /* The user may have specified a symlink in fstab, resolve the path */ 498 if (realpath(fs->fs_file, realfsfile) == NULL) { 499 /* Cannot resolve the path, use original one */ 500 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 501 } 502 503 /* 504 * Consider the filesystem to be mounted if: 505 * It has the same mountpoint as a mounted filesytem, and 506 * It has the same type as that same mounted filesystem, and 507 * It has the same device name as that same mounted filesystem, OR 508 * It is a nonremountable filesystem 509 */ 510 for (i = mntsize - 1; i >= 0; --i) 511 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 512 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 && 513 (!isremountable(fs->fs_vfstype) || 514 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))) 515 return (1); 516 return (0); 517 } 518 519 int 520 isremountable(const char *vfsname) 521 { 522 const char **cp; 523 524 for (cp = remountable_fs_names; *cp; cp++) 525 if (strcmp(*cp, vfsname) == 0) 526 return (1); 527 return (0); 528 } 529 530 int 531 hasopt(const char *mntopts, const char *option) 532 { 533 int negative, found; 534 char *opt, *optbuf; 535 536 if (option[0] == 'n' && option[1] == 'o') { 537 negative = 1; 538 option += 2; 539 } else 540 negative = 0; 541 optbuf = strdup(mntopts); 542 found = 0; 543 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 544 if (opt[0] == 'n' && opt[1] == 'o') { 545 if (!strcasecmp(opt + 2, option)) 546 found = negative; 547 } else if (!strcasecmp(opt, option)) 548 found = !negative; 549 } 550 free(optbuf); 551 return (found); 552 } 553 554 static void 555 append_arg(struct cpa *sa, char *arg) 556 { 557 if (sa->c + 1 == sa->sz) { 558 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 559 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz); 560 if (sa->a == NULL) 561 xo_errx(1, "realloc failed"); 562 } 563 sa->a[++sa->c] = arg; 564 } 565 566 int 567 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 568 const char *options, const char *mntopts) 569 { 570 struct statfs sf; 571 int i, ret; 572 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 573 static struct cpa mnt_argv; 574 575 /* resolve the mountpoint with realpath(3) */ 576 if (checkpath(name, mntpath) != 0) { 577 xo_warn("%s", mntpath); 578 return (1); 579 } 580 name = mntpath; 581 582 if (mntopts == NULL) 583 mntopts = ""; 584 optbuf = catopt(strdup(mntopts), options); 585 586 if (strcmp(name, "/") == 0) 587 flags |= MNT_UPDATE; 588 if (flags & MNT_FORCE) 589 optbuf = catopt(optbuf, "force"); 590 if (flags & MNT_RDONLY) 591 optbuf = catopt(optbuf, "ro"); 592 /* 593 * XXX 594 * The mount_mfs (newfs) command uses -o to select the 595 * optimization mode. We don't pass the default "-o rw" 596 * for that reason. 597 */ 598 if (flags & MNT_UPDATE) 599 optbuf = catopt(optbuf, "update"); 600 601 /* Compatibility glue. */ 602 if (strcmp(vfstype, "msdos") == 0) 603 vfstype = "msdosfs"; 604 605 /* Construct the name of the appropriate mount command */ 606 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 607 608 mnt_argv.c = -1; 609 append_arg(&mnt_argv, execname); 610 mangle(optbuf, &mnt_argv); 611 if (mountprog != NULL) 612 strlcpy(execname, mountprog, sizeof(execname)); 613 614 append_arg(&mnt_argv, strdup(spec)); 615 append_arg(&mnt_argv, strdup(name)); 616 append_arg(&mnt_argv, NULL); 617 618 if (debug) { 619 if (use_mountprog(vfstype)) 620 xo_emit("{Lwc:exec}{:execname/%s}", execname); 621 else 622 xo_emit("{:execname/mount}{P: }{l:opts/-t}{P: }{l:opts/%s}", vfstype); 623 for (i = 1; i < mnt_argv.c; i++) 624 xo_emit("{P: }{l:opts}", mnt_argv.a[i]); 625 xo_emit("\n"); 626 free(optbuf); 627 free(mountprog); 628 mountprog = NULL; 629 return (0); 630 } 631 632 if (use_mountprog(vfstype)) { 633 ret = exec_mountprog(name, execname, mnt_argv.a); 634 } else { 635 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 636 } 637 638 free(optbuf); 639 free(mountprog); 640 mountprog = NULL; 641 642 if (verbose) { 643 if (statfs(name, &sf) < 0) { 644 xo_warn("statfs %s", name); 645 return (1); 646 } 647 if (fstab_style) { 648 xo_open_list("fstab"); 649 xo_open_instance("fstab"); 650 putfsent(&sf); 651 xo_close_instance("fstab"); 652 xo_close_list("fstab"); 653 } else { 654 xo_open_list("mounted"); 655 xo_open_instance("mounted"); 656 prmount(&sf); 657 xo_close_instance("mounted"); 658 xo_close_list("mounted"); 659 } 660 } 661 662 return (ret); 663 } 664 665 void 666 prmount(struct statfs *sfp) 667 { 668 uint64_t flags; 669 unsigned int i; 670 struct mntoptnames *o; 671 struct passwd *pw; 672 char *fsidbuf; 673 674 xo_emit("{:special/%hs}{L: on }{:node/%hs}{L: (}{:fstype}", sfp->f_mntfromname, 675 sfp->f_mntonname, sfp->f_fstypename); 676 677 flags = sfp->f_flags & MNT_VISFLAGMASK; 678 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 679 if (flags & o->o_opt) { 680 xo_emit("{D:, }{l:opts}", o->o_name); 681 flags &= ~o->o_opt; 682 } 683 /* 684 * Inform when file system is mounted by an unprivileged user 685 * or privileged non-root user. 686 */ 687 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 688 xo_emit("{D:, }{L:mounted by }"); 689 if ((pw = getpwuid(sfp->f_owner)) != NULL) 690 xo_emit("{:mounter/%hs}", pw->pw_name); 691 else 692 xo_emit("{:mounter/%hs}", sfp->f_owner); 693 } 694 if (verbose) { 695 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) { 696 xo_open_container("writes"); 697 xo_emit("{D:, }{Lwc:writes}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 698 (uintmax_t)sfp->f_syncwrites, 699 (uintmax_t)sfp->f_asyncwrites); 700 xo_close_container("writes"); 701 } 702 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) { 703 xo_open_container("reads"); 704 xo_emit("{D:, }{Lwc:reads}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 705 (uintmax_t)sfp->f_syncreads, 706 (uintmax_t)sfp->f_asyncreads); 707 xo_close_container("reads"); 708 } 709 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 710 fsidbuf = malloc(sizeof(sfp->f_fsid) * 2 + 1); 711 if (fsidbuf == NULL) 712 xo_errx(1, "malloc failed"); 713 for (i = 0; i < sizeof(sfp->f_fsid); i++) 714 sprintf(&fsidbuf[i * 2], "%02x", 715 ((u_char *)&sfp->f_fsid)[i]); 716 fsidbuf[i * 2] = '\0'; 717 xo_emit("{D:, }{Lw:fsid}{:fsid}", fsidbuf); 718 free(fsidbuf); 719 } 720 } 721 xo_emit("{D:)}\n"); 722 } 723 724 struct statfs * 725 getmntpt(const char *name) 726 { 727 struct statfs *mntbuf; 728 int i, mntsize; 729 730 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 731 for (i = mntsize - 1; i >= 0; i--) { 732 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 733 strcmp(mntbuf[i].f_mntonname, name) == 0) 734 return (&mntbuf[i]); 735 } 736 return (NULL); 737 } 738 739 char * 740 catopt(char *s0, const char *s1) 741 { 742 char *cp; 743 744 if (s1 == NULL || *s1 == '\0') 745 return (s0); 746 747 if (s0 && *s0) { 748 if (asprintf(&cp, "%s,%s", s0, s1) == -1) 749 xo_errx(1, "asprintf failed"); 750 } else 751 cp = strdup(s1); 752 753 if (s0) 754 free(s0); 755 return (cp); 756 } 757 758 void 759 mangle(char *options, struct cpa *a) 760 { 761 char *p, *s, *val; 762 763 for (s = options; (p = strsep(&s, ",")) != NULL;) 764 if (*p != '\0') { 765 if (strcmp(p, "noauto") == 0) { 766 /* 767 * Do not pass noauto option to nmount(). 768 * or external mount program. noauto is 769 * only used to prevent mounting a filesystem 770 * when 'mount -a' is specified, and is 771 * not a real mount option. 772 */ 773 continue; 774 } else if (strcmp(p, "late") == 0) { 775 /* 776 * "late" is used to prevent certain file 777 * systems from being mounted before late 778 * in the boot cycle; for instance, 779 * loopback NFS mounts can't be mounted 780 * before mountd starts. 781 */ 782 continue; 783 } else if (strcmp(p, "failok") == 0) { 784 /* 785 * "failok" is used to prevent certain file 786 * systems from being causing the system to 787 * drop into single user mode in the boot 788 * cycle, and is not a real mount option. 789 */ 790 continue; 791 } else if (strncmp(p, "mountprog", 9) == 0) { 792 /* 793 * "mountprog" is used to force the use of 794 * userland mount programs. 795 */ 796 val = strchr(p, '='); 797 if (val != NULL) { 798 ++val; 799 if (*val != '\0') 800 mountprog = strdup(val); 801 } 802 803 if (mountprog == NULL) { 804 xo_errx(1, "Need value for -o mountprog"); 805 } 806 continue; 807 } else if (strcmp(p, "userquota") == 0) { 808 continue; 809 } else if (strncmp(p, userquotaeq, 810 sizeof(userquotaeq) - 1) == 0) { 811 continue; 812 } else if (strcmp(p, "groupquota") == 0) { 813 continue; 814 } else if (strncmp(p, groupquotaeq, 815 sizeof(groupquotaeq) - 1) == 0) { 816 continue; 817 } else if (*p == '-') { 818 append_arg(a, p); 819 p = strchr(p, '='); 820 if (p != NULL) { 821 *p = '\0'; 822 append_arg(a, p + 1); 823 } 824 } else { 825 append_arg(a, strdup("-o")); 826 append_arg(a, p); 827 } 828 } 829 } 830 831 832 char * 833 update_options(char *opts, char *fstab, int curflags) 834 { 835 char *o, *p; 836 char *cur; 837 char *expopt, *newopt, *tmpopt; 838 839 if (opts == NULL) 840 return (strdup("")); 841 842 /* remove meta options from list */ 843 remopt(fstab, MOUNT_META_OPTION_FSTAB); 844 remopt(fstab, MOUNT_META_OPTION_CURRENT); 845 cur = flags2opts(curflags); 846 847 /* 848 * Expand all meta-options passed to us first. 849 */ 850 expopt = NULL; 851 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 852 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 853 expopt = catopt(expopt, fstab); 854 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 855 expopt = catopt(expopt, cur); 856 else 857 expopt = catopt(expopt, o); 858 } 859 free(cur); 860 free(opts); 861 862 /* 863 * Remove previous contradictory arguments. Given option "foo" we 864 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 865 * and "foo" - so we can deal with possible options like "notice". 866 */ 867 newopt = NULL; 868 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 869 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 870 xo_errx(1, "malloc failed"); 871 872 strcpy(tmpopt, "no"); 873 strcat(tmpopt, o); 874 remopt(newopt, tmpopt); 875 free(tmpopt); 876 877 if (strncmp("no", o, 2) == 0) 878 remopt(newopt, o+2); 879 880 newopt = catopt(newopt, o); 881 } 882 free(expopt); 883 884 return (newopt); 885 } 886 887 void 888 remopt(char *string, const char *opt) 889 { 890 char *o, *p, *r; 891 892 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 893 return; 894 895 r = string; 896 897 for (p = string; (o = strsep(&p, ",")) != NULL;) { 898 if (strcmp(opt, o) != 0) { 899 if (*r == ',' && *o != '\0') 900 r++; 901 while ((*r++ = *o++) != '\0') 902 ; 903 *--r = ','; 904 } 905 } 906 *r = '\0'; 907 } 908 909 void 910 usage(void) 911 { 912 913 xo_error("%s\n%s\n%s\n", 914 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 915 " mount [-dfpruvw] special | node", 916 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 917 EXIT(1); 918 } 919 920 void 921 putfsent(struct statfs *ent) 922 { 923 struct fstab *fst; 924 char *opts, *rw; 925 int l; 926 927 opts = NULL; 928 /* flags2opts() doesn't return the "rw" option. */ 929 if ((ent->f_flags & MNT_RDONLY) != 0) 930 rw = NULL; 931 else 932 rw = catopt(NULL, "rw"); 933 934 opts = flags2opts(ent->f_flags); 935 opts = catopt(rw, opts); 936 937 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 938 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 939 strlcpy(ent->f_mntfromname, 940 (strnstr(ent->f_mntfromname, ":", 8) +1), 941 sizeof(ent->f_mntfromname)); 942 } 943 944 l = strlen(ent->f_mntfromname); 945 xo_emit("{:device}{P:/%s}{P:/%s}{P:/%s}", 946 ent->f_mntfromname, 947 l < 8 ? "\t" : "", 948 l < 16 ? "\t" : "", 949 l < 24 ? "\t" : " "); 950 l = strlen(ent->f_mntonname); 951 xo_emit("{:mntpoint}{P:/%s}{P:/%s}{P:/%s}", 952 ent->f_mntonname, 953 l < 8 ? "\t" : "", 954 l < 16 ? "\t" : "", 955 l < 24 ? "\t" : " "); 956 xo_emit("{:fstype}{P:\t}", ent->f_fstypename); 957 l = strlen(opts); 958 xo_emit("{:opts}{P:/%s}", opts, 959 l < 8 ? "\t" : " "); 960 free(opts); 961 962 if ((fst = getfsspec(ent->f_mntfromname))) 963 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 964 fst->fs_freq, fst->fs_passno); 965 else if ((fst = getfsfile(ent->f_mntonname))) 966 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 967 fst->fs_freq, fst->fs_passno); 968 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 969 if (strcmp(ent->f_mntonname, "/") == 0) 970 xo_emit("{P:\t}{n:dump/1}{P: }{n:pass/1}\n"); 971 else 972 xo_emit("{P:\t}{n:dump/2}{P: }{n:pass/2}\n"); 973 } else 974 xo_emit("{P:\t}{n:dump/0}{P: }{n:pass/0}\n"); 975 } 976 977 978 char * 979 flags2opts(int flags) 980 { 981 char *res; 982 983 res = NULL; 984 985 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 986 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 987 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 988 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 989 if (flags & MNT_UNION) res = catopt(res, "union"); 990 if (flags & MNT_ASYNC) res = catopt(res, "async"); 991 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 992 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 993 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 994 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 995 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 996 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 997 if (flags & MNT_ACLS) res = catopt(res, "acls"); 998 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 999 if (flags & MNT_UNTRUSTED) res = catopt(res, "untrusted"); 1000 if (flags & MNT_NOCOVER) res = catopt(res, "nocover"); 1001 if (flags & MNT_EMPTYDIR) res = catopt(res, "emptydir"); 1002 1003 return (res); 1004 } 1005