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