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 int hasopt(const char *, const char *); 89 int ismounted(struct fstab *, struct statfs *, int); 90 int isremountable(const char *); 91 int allow_file_mount(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 { 210 211 pidfile_signal(_PATH_MOUNTDPID, SIGHUP, NULL); 212 } 213 214 int 215 main(int argc, char *argv[]) 216 { 217 const char *mntfromname, **vfslist, *vfstype; 218 struct fstab *fs; 219 struct statfs *mntbuf; 220 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro; 221 int onlylate; 222 char *cp, *ep, *options; 223 224 all = init_flags = late = onlylate = 0; 225 ro = 0; 226 options = NULL; 227 vfslist = NULL; 228 vfstype = "ufs"; 229 230 argc = xo_parse_args(argc, argv); 231 if (argc < 0) 232 exit(1); 233 xo_open_container("mount"); 234 235 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1) 236 switch (ch) { 237 case 'a': 238 all = 1; 239 break; 240 case 'd': 241 debug = 1; 242 break; 243 case 'F': 244 setfstab(optarg); 245 break; 246 case 'f': 247 init_flags |= MNT_FORCE; 248 break; 249 case 'L': 250 onlylate = 1; 251 late = 1; 252 break; 253 case 'l': 254 late = 1; 255 break; 256 case 'n': 257 /* For compatibility with the Linux version of mount. */ 258 break; 259 case 'o': 260 if (*optarg) { 261 options = catopt(options, optarg); 262 if (specified_ro(optarg)) 263 ro = 1; 264 } 265 break; 266 case 'p': 267 fstab_style = 1; 268 verbose = 1; 269 break; 270 case 'r': 271 options = catopt(options, "ro"); 272 ro = 1; 273 break; 274 case 't': 275 if (vfslist != NULL) 276 xo_errx(1, "only one -t option may be specified"); 277 vfslist = makevfslist(optarg); 278 vfstype = optarg; 279 break; 280 case 'u': 281 init_flags |= MNT_UPDATE; 282 break; 283 case 'v': 284 verbose = 1; 285 break; 286 case 'w': 287 options = catopt(options, "noro"); 288 break; 289 case '?': 290 default: 291 usage(); 292 /* NOTREACHED */ 293 } 294 argc -= optind; 295 argv += optind; 296 297 #define BADTYPE(type) \ 298 (strcmp(type, FSTAB_RO) && \ 299 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 300 301 if ((init_flags & MNT_UPDATE) && (ro == 0)) 302 options = catopt(options, "noro"); 303 304 rval = 0; 305 switch (argc) { 306 case 0: 307 if ((mntsize = getmntinfo(&mntbuf, 308 verbose ? MNT_WAIT : MNT_NOWAIT)) == 0) 309 xo_err(1, "getmntinfo"); 310 if (all) { 311 while ((fs = getfsent()) != NULL) { 312 if (BADTYPE(fs->fs_type)) 313 continue; 314 if (checkvfsname(fs->fs_vfstype, vfslist)) 315 continue; 316 if (hasopt(fs->fs_mntops, "noauto")) 317 continue; 318 if (!hasopt(fs->fs_mntops, "late") && onlylate) 319 continue; 320 if (hasopt(fs->fs_mntops, "late") && !late) 321 continue; 322 if (hasopt(fs->fs_mntops, "failok")) 323 failok = 1; 324 else 325 failok = 0; 326 if (!(init_flags & MNT_UPDATE) && 327 !hasopt(fs->fs_mntops, "update") && 328 ismounted(fs, mntbuf, mntsize)) 329 continue; 330 options = update_options(options, fs->fs_mntops, 331 mntbuf->f_flags); 332 if (mountfs(fs->fs_vfstype, fs->fs_spec, 333 fs->fs_file, init_flags, options, 334 fs->fs_mntops) && !failok) 335 rval = 1; 336 } 337 } else if (fstab_style) { 338 xo_open_list("fstab"); 339 for (i = 0; i < mntsize; i++) { 340 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 341 continue; 342 xo_open_instance("fstab"); 343 putfsent(&mntbuf[i]); 344 xo_close_instance("fstab"); 345 } 346 xo_close_list("fstab"); 347 } else { 348 xo_open_list("mounted"); 349 for (i = 0; i < mntsize; i++) { 350 if (checkvfsname(mntbuf[i].f_fstypename, 351 vfslist)) 352 continue; 353 if (!verbose && 354 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 355 continue; 356 xo_open_instance("mounted"); 357 prmount(&mntbuf[i]); 358 xo_close_instance("mounted"); 359 } 360 xo_close_list("mounted"); 361 } 362 EXIT(rval); 363 case 1: 364 if (vfslist != NULL) 365 usage(); 366 367 rmslashes(*argv, *argv); 368 if (init_flags & MNT_UPDATE) { 369 mntfromname = NULL; 370 have_fstab = 0; 371 if ((mntbuf = getmntpoint(*argv)) == NULL) 372 xo_errx(1, "not currently mounted %s", *argv); 373 /* 374 * Only get the mntflags from fstab if both mntpoint 375 * and mntspec are identical. Also handle the special 376 * case where just '/' is mounted and 'spec' is not 377 * identical with the one from fstab ('/dev' is missing 378 * in the spec-string at boot-time). 379 */ 380 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 381 if (strcmp(fs->fs_spec, 382 mntbuf->f_mntfromname) == 0 && 383 strcmp(fs->fs_file, 384 mntbuf->f_mntonname) == 0) { 385 have_fstab = 1; 386 mntfromname = mntbuf->f_mntfromname; 387 } else if (argv[0][0] == '/' && 388 argv[0][1] == '\0' && 389 strcmp(fs->fs_vfstype, 390 mntbuf->f_fstypename) == 0) { 391 fs = getfsfile("/"); 392 have_fstab = 1; 393 mntfromname = fs->fs_spec; 394 } 395 } 396 if (have_fstab) { 397 options = update_options(options, fs->fs_mntops, 398 mntbuf->f_flags); 399 } else { 400 mntfromname = mntbuf->f_mntfromname; 401 options = update_options(options, NULL, 402 mntbuf->f_flags); 403 } 404 rval = mountfs(mntbuf->f_fstypename, mntfromname, 405 mntbuf->f_mntonname, init_flags, options, 0); 406 break; 407 } 408 if ((fs = getfsfile(*argv)) == NULL && 409 (fs = getfsspec(*argv)) == NULL) 410 xo_errx(1, "%s: unknown special file or file system", 411 *argv); 412 if (BADTYPE(fs->fs_type)) 413 xo_errx(1, "%s has unknown file system type", 414 *argv); 415 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 416 init_flags, options, fs->fs_mntops); 417 break; 418 case 2: 419 /* 420 * If -t flag has not been specified, the path cannot be 421 * found, spec contains either a ':' or a '@', then assume 422 * that an NFS file system is being specified ala Sun. 423 * Check if the hostname contains only allowed characters 424 * to reduce false positives. IPv6 addresses containing 425 * ':' will be correctly parsed only if the separator is '@'. 426 * The definition of a valid hostname is taken from RFC 1034. 427 */ 428 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 429 (ep = strchr(argv[0], ':')) != NULL)) { 430 if (*ep == '@') { 431 cp = ep + 1; 432 ep = cp + strlen(cp); 433 } else 434 cp = argv[0]; 435 while (cp != ep) { 436 if (!isdigit(*cp) && !isalpha(*cp) && 437 *cp != '.' && *cp != '-' && *cp != ':') 438 break; 439 cp++; 440 } 441 if (cp == ep) 442 vfstype = "nfs"; 443 } 444 rval = mountfs(vfstype, 445 argv[0], argv[1], init_flags, options, NULL); 446 break; 447 default: 448 usage(); 449 /* NOTREACHED */ 450 } 451 452 /* 453 * If the mount was successfully, and done by root, tell mountd the 454 * good news. 455 */ 456 if (rval == 0 && getuid() == 0) 457 restart_mountd(); 458 459 EXIT(rval); 460 } 461 462 int 463 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 464 { 465 char realfsfile[PATH_MAX]; 466 int i; 467 468 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 469 /* the root file system can always be remounted */ 470 return (0); 471 472 /* The user may have specified a symlink in fstab, resolve the path */ 473 if (realpath(fs->fs_file, realfsfile) == NULL) { 474 /* Cannot resolve the path, use original one */ 475 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 476 } 477 478 /* 479 * Consider the filesystem to be mounted if: 480 * It has the same mountpoint as a mounted filesystem, and 481 * It has the same type as that same mounted filesystem, and 482 * It has the same device name as that same mounted filesystem, OR 483 * It is a nonremountable filesystem 484 */ 485 for (i = mntsize - 1; i >= 0; --i) 486 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 487 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 && 488 (!isremountable(fs->fs_vfstype) || 489 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))) 490 return (1); 491 return (0); 492 } 493 494 int 495 isremountable(const char *vfsname) 496 { 497 const char **cp; 498 499 for (cp = remountable_fs_names; *cp; cp++) 500 if (strcmp(*cp, vfsname) == 0) 501 return (1); 502 return (0); 503 } 504 505 int 506 allow_file_mount(const char *vfsname) 507 { 508 509 if (strcmp(vfsname, "nullfs") == 0) 510 return (1); 511 return (0); 512 } 513 514 int 515 hasopt(const char *mntopts, const char *option) 516 { 517 int negative, found; 518 char *opt, *optbuf; 519 520 if (option[0] == 'n' && option[1] == 'o') { 521 negative = 1; 522 option += 2; 523 } else 524 negative = 0; 525 optbuf = strdup(mntopts); 526 found = 0; 527 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 528 if (opt[0] == 'n' && opt[1] == 'o') { 529 if (!strcasecmp(opt + 2, option)) 530 found = negative; 531 } else if (!strcasecmp(opt, option)) 532 found = !negative; 533 } 534 free(optbuf); 535 return (found); 536 } 537 538 static void 539 append_arg(struct cpa *sa, char *arg) 540 { 541 if (sa->c + 1 == sa->sz) { 542 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 543 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz); 544 if (sa->a == NULL) 545 xo_errx(1, "realloc failed"); 546 } 547 sa->a[++sa->c] = arg; 548 } 549 550 int 551 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 552 const char *options, const char *mntopts) 553 { 554 struct statfs sf; 555 int i, ret; 556 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 557 static struct cpa mnt_argv; 558 559 /* resolve the mountpoint with realpath(3) */ 560 if (allow_file_mount(vfstype)) { 561 if (checkpath_allow_file(name, mntpath) != 0) { 562 xo_warn("%s", mntpath); 563 return (1); 564 } 565 } else { 566 if (checkpath(name, mntpath) != 0) { 567 xo_warn("%s", mntpath); 568 return (1); 569 } 570 } 571 name = mntpath; 572 573 if (mntopts == NULL) 574 mntopts = ""; 575 optbuf = catopt(strdup(mntopts), options); 576 577 if (strcmp(name, "/") == 0) 578 flags |= MNT_UPDATE; 579 if (flags & MNT_FORCE) 580 optbuf = catopt(optbuf, "force"); 581 if (flags & MNT_RDONLY) 582 optbuf = catopt(optbuf, "ro"); 583 /* 584 * XXX 585 * The mount_mfs (newfs) command uses -o to select the 586 * optimization mode. We don't pass the default "-o rw" 587 * for that reason. 588 */ 589 if (flags & MNT_UPDATE) 590 optbuf = catopt(optbuf, "update"); 591 592 /* Compatibility glue. */ 593 if (strcmp(vfstype, "msdos") == 0) 594 vfstype = "msdosfs"; 595 596 /* Construct the name of the appropriate mount command */ 597 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 598 599 mnt_argv.c = -1; 600 append_arg(&mnt_argv, execname); 601 mangle(optbuf, &mnt_argv); 602 if (mountprog != NULL) 603 strlcpy(execname, mountprog, sizeof(execname)); 604 605 append_arg(&mnt_argv, strdup(spec)); 606 append_arg(&mnt_argv, strdup(name)); 607 append_arg(&mnt_argv, NULL); 608 609 if (debug) { 610 if (use_mountprog(vfstype)) 611 xo_emit("{Lwc:exec}{:execname/%s}", execname); 612 else 613 xo_emit("{:execname/mount}{P: }{l:opts/-t}{P: }{l:opts/%s}", vfstype); 614 for (i = 1; i < mnt_argv.c; i++) 615 xo_emit("{P: }{l:opts}", mnt_argv.a[i]); 616 xo_emit("\n"); 617 free(optbuf); 618 free(mountprog); 619 mountprog = NULL; 620 return (0); 621 } 622 623 if (use_mountprog(vfstype)) { 624 ret = exec_mountprog(name, execname, mnt_argv.a); 625 } else { 626 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 627 } 628 629 free(optbuf); 630 free(mountprog); 631 mountprog = NULL; 632 633 if (verbose) { 634 if (statfs(name, &sf) < 0) { 635 xo_warn("statfs %s", name); 636 return (1); 637 } 638 if (fstab_style) { 639 xo_open_list("fstab"); 640 xo_open_instance("fstab"); 641 putfsent(&sf); 642 xo_close_instance("fstab"); 643 xo_close_list("fstab"); 644 } else { 645 xo_open_list("mounted"); 646 xo_open_instance("mounted"); 647 prmount(&sf); 648 xo_close_instance("mounted"); 649 xo_close_list("mounted"); 650 } 651 } 652 653 return (ret); 654 } 655 656 void 657 prmount(struct statfs *sfp) 658 { 659 uint64_t flags; 660 unsigned int i; 661 struct mntoptnames *o; 662 struct passwd *pw; 663 char *fsidbuf; 664 665 xo_emit("{:special/%hs}{L: on }{:node/%hs}{L: (}{:fstype}", sfp->f_mntfromname, 666 sfp->f_mntonname, sfp->f_fstypename); 667 668 flags = sfp->f_flags & MNT_VISFLAGMASK; 669 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 670 if (flags & o->o_opt) { 671 xo_emit("{D:, }{l:opts}", o->o_name); 672 flags &= ~o->o_opt; 673 } 674 /* 675 * Inform when file system is mounted by an unprivileged user 676 * or privileged non-root user. 677 */ 678 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 679 xo_emit("{D:, }{L:mounted by }"); 680 if ((pw = getpwuid(sfp->f_owner)) != NULL) 681 xo_emit("{:mounter/%hs}", pw->pw_name); 682 else 683 xo_emit("{:mounter/%hs}", sfp->f_owner); 684 } 685 if (verbose) { 686 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) { 687 xo_open_container("writes"); 688 xo_emit("{D:, }{Lwc:writes}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 689 (uintmax_t)sfp->f_syncwrites, 690 (uintmax_t)sfp->f_asyncwrites); 691 xo_close_container("writes"); 692 } 693 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) { 694 xo_open_container("reads"); 695 xo_emit("{D:, }{Lwc:reads}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 696 (uintmax_t)sfp->f_syncreads, 697 (uintmax_t)sfp->f_asyncreads); 698 xo_close_container("reads"); 699 } 700 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 701 fsidbuf = malloc(sizeof(sfp->f_fsid) * 2 + 1); 702 if (fsidbuf == NULL) 703 xo_errx(1, "malloc failed"); 704 for (i = 0; i < sizeof(sfp->f_fsid); i++) 705 sprintf(&fsidbuf[i * 2], "%02x", 706 ((u_char *)&sfp->f_fsid)[i]); 707 fsidbuf[i * 2] = '\0'; 708 xo_emit("{D:, }{Lw:fsid}{:fsid}", fsidbuf); 709 free(fsidbuf); 710 } 711 if (sfp->f_nvnodelistsize != 0) { 712 xo_open_container("vnodes"); 713 xo_emit("{D:, }{Lwc:vnodes}{Lw:count}{w:count/%ju}", 714 (uintmax_t)sfp->f_nvnodelistsize); 715 xo_close_container("vnodes"); 716 } 717 } 718 xo_emit("{D:)}\n"); 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 xo_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 xo_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 xo_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 xo_error("%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 xo_emit("{:device}{P:/%s}{P:/%s}{P:/%s}", 928 ent->f_mntfromname, 929 l < 8 ? "\t" : "", 930 l < 16 ? "\t" : "", 931 l < 24 ? "\t" : " "); 932 l = strlen(ent->f_mntonname); 933 xo_emit("{:mntpoint}{P:/%s}{P:/%s}{P:/%s}", 934 ent->f_mntonname, 935 l < 8 ? "\t" : "", 936 l < 16 ? "\t" : "", 937 l < 24 ? "\t" : " "); 938 xo_emit("{:fstype}{P:\t}", ent->f_fstypename); 939 l = strlen(opts); 940 xo_emit("{:opts}{P:/%s}", opts, 941 l < 8 ? "\t" : " "); 942 free(opts); 943 944 if ((fst = getfsspec(ent->f_mntfromname))) 945 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 946 fst->fs_freq, fst->fs_passno); 947 else if ((fst = getfsfile(ent->f_mntonname))) 948 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 949 fst->fs_freq, fst->fs_passno); 950 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 951 if (strcmp(ent->f_mntonname, "/") == 0) 952 xo_emit("{P:\t}{n:dump/1}{P: }{n:pass/1}\n"); 953 else 954 xo_emit("{P:\t}{n:dump/2}{P: }{n:pass/2}\n"); 955 } else 956 xo_emit("{P:\t}{n:dump/0}{P: }{n:pass/0}\n"); 957 } 958 959 960 char * 961 flags2opts(int flags) 962 { 963 char *res; 964 965 res = NULL; 966 967 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 968 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 969 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 970 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 971 if (flags & MNT_UNION) res = catopt(res, "union"); 972 if (flags & MNT_ASYNC) res = catopt(res, "async"); 973 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 974 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 975 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 976 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 977 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 978 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 979 if (flags & MNT_ACLS) res = catopt(res, "acls"); 980 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 981 if (flags & MNT_UNTRUSTED) res = catopt(res, "untrusted"); 982 if (flags & MNT_NOCOVER) res = catopt(res, "nocover"); 983 if (flags & MNT_EMPTYDIR) res = catopt(res, "emptydir"); 984 985 return (res); 986 } 987