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 #include <sys/param.h>
33 #define _WANT_MNTOPTNAMES
34 #include <sys/mount.h>
35 #include <sys/stat.h>
36 #include <sys/wait.h>
37
38 #include <ctype.h>
39
40 #include <errno.h>
41 #include <fstab.h>
42 #include <paths.h>
43 #include <pwd.h>
44 #include <signal.h>
45 #include <stdint.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50 #include <libutil.h>
51 #include <libxo/xo.h>
52
53 #include "extern.h"
54 #include "mntopts.h"
55 #include "pathnames.h"
56
57 #define EXIT(a) { \
58 xo_close_container("mount"); \
59 if (xo_finish() < 0) \
60 xo_err(EXIT_FAILURE, "stdout"); \
61 exit(a); \
62 }
63
64 /* `meta' options */
65 #define MOUNT_META_OPTION_FSTAB "fstab"
66 #define MOUNT_META_OPTION_CURRENT "current"
67
68 static int debug, fstab_style, verbose;
69
70 struct cpa {
71 char **a;
72 ssize_t sz;
73 int c;
74 };
75
76 char *catopt(char *, const char *);
77 int hasopt(const char *, const char *);
78 int ismounted(struct fstab *, struct statfs *, int);
79 int isremountable(const char *);
80 int allow_file_mount(const char *);
81 void mangle(char *, struct cpa *);
82 char *update_options(char *, char *, int);
83 int mountfs(const char *, const char *, const char *,
84 int, const char *, const char *);
85 void remopt(char *, const char *);
86 void prmount(struct statfs *);
87 void putfsent(struct statfs *);
88 void usage(void);
89 char *flags2opts(int);
90
91 /* Map from mount options to printable formats. */
92 static struct mntoptnames optnames[] = {
93 MNTOPT_NAMES
94 };
95
96 /*
97 * List of VFS types that can be remounted without becoming mounted on top
98 * of each other.
99 * XXX Is this list correct?
100 */
101 static const char *
102 remountable_fs_names[] = {
103 "ufs", "ffs", "ext2fs",
104 0
105 };
106
107 static const char userquotaeq[] = "userquota=";
108 static const char groupquotaeq[] = "groupquota=";
109
110 static char *mountprog = NULL;
111
112 static int
use_mountprog(const char * vfstype)113 use_mountprog(const char *vfstype)
114 {
115 /* XXX: We need to get away from implementing external mount
116 * programs for every filesystem, and move towards having
117 * each filesystem properly implement the nmount() system call.
118 */
119 unsigned int i;
120 const char *fs[] = {
121 "cd9660", "mfs", "msdosfs", "nfs",
122 "nullfs", "smbfs", "udf", "unionfs",
123 NULL
124 };
125
126 if (mountprog != NULL)
127 return (1);
128
129 for (i = 0; fs[i] != NULL; ++i) {
130 if (strcmp(vfstype, fs[i]) == 0)
131 return (1);
132 }
133
134 return (0);
135 }
136
137 static int
exec_mountprog(const char * name,const char * execname,char * const argv[])138 exec_mountprog(const char *name, const char *execname, char *const argv[])
139 {
140 pid_t pid;
141 int status;
142
143 switch (pid = fork()) {
144 case -1: /* Error. */
145 xo_warn("fork");
146 EXIT(EXIT_FAILURE);
147 case 0: /* Child. */
148 /* Go find an executable. */
149 execvP(execname, _PATH_SYSPATH, argv);
150 if (errno == ENOENT) {
151 xo_warn("exec %s not found", execname);
152 if (execname[0] != '/') {
153 xo_warnx("in path: %s", _PATH_SYSPATH);
154 }
155 }
156 EXIT(EXIT_FAILURE);
157 default: /* Parent. */
158 if (waitpid(pid, &status, 0) < 0) {
159 xo_warn("waitpid");
160 return (1);
161 }
162
163 if (WIFEXITED(status)) {
164 if (WEXITSTATUS(status) != 0)
165 return (WEXITSTATUS(status));
166 } else if (WIFSIGNALED(status)) {
167 xo_warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
168 return (1);
169 }
170 break;
171 }
172
173 return (0);
174 }
175
176 static int
specified_ro(const char * arg)177 specified_ro(const char *arg)
178 {
179 char *optbuf, *opt;
180 int ret = 0;
181
182 optbuf = strdup(arg);
183 if (optbuf == NULL)
184 xo_err(1, "strdup failed");
185
186 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
187 if (strcmp(opt, "ro") == 0) {
188 ret = 1;
189 break;
190 }
191 }
192 free(optbuf);
193 return (ret);
194 }
195
196 static void
restart_mountd(void)197 restart_mountd(void)
198 {
199
200 pidfile_signal(_PATH_MOUNTDPID, SIGHUP, NULL);
201 }
202
203 int
main(int argc,char * argv[])204 main(int argc, char *argv[])
205 {
206 const char *mntfromname, **vfslist, *vfstype;
207 struct fstab *fs;
208 struct statfs *mntbuf;
209 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro;
210 int onlylate;
211 char *cp, *ep, *options;
212
213 all = init_flags = late = onlylate = 0;
214 ro = 0;
215 options = NULL;
216 vfslist = NULL;
217 vfstype = "ufs";
218
219 argc = xo_parse_args(argc, argv);
220 if (argc < 0)
221 exit(EXIT_FAILURE);
222 xo_open_container("mount");
223
224 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1)
225 switch (ch) {
226 case 'a':
227 all = 1;
228 break;
229 case 'd':
230 debug = 1;
231 break;
232 case 'F':
233 setfstab(optarg);
234 break;
235 case 'f':
236 init_flags |= MNT_FORCE;
237 break;
238 case 'L':
239 onlylate = 1;
240 late = 1;
241 break;
242 case 'l':
243 late = 1;
244 break;
245 case 'n':
246 /* For compatibility with the Linux version of mount. */
247 break;
248 case 'o':
249 if (*optarg) {
250 options = catopt(options, optarg);
251 if (specified_ro(optarg))
252 ro = 1;
253 }
254 break;
255 case 'p':
256 fstab_style = 1;
257 verbose = 1;
258 break;
259 case 'r':
260 options = catopt(options, "ro");
261 ro = 1;
262 break;
263 case 't':
264 if (vfslist != NULL)
265 xo_errx(1, "only one -t option may be specified");
266 vfslist = makevfslist(optarg);
267 vfstype = optarg;
268 break;
269 case 'u':
270 init_flags |= MNT_UPDATE;
271 break;
272 case 'v':
273 verbose = 1;
274 break;
275 case 'w':
276 options = catopt(options, "noro");
277 break;
278 case '?':
279 default:
280 usage();
281 /* NOTREACHED */
282 }
283 argc -= optind;
284 argv += optind;
285
286 #define BADTYPE(type) \
287 (strcmp(type, FSTAB_RO) && \
288 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
289
290 if ((init_flags & MNT_UPDATE) && (ro == 0))
291 options = catopt(options, "noro");
292
293 rval = EXIT_SUCCESS;
294 switch (argc) {
295 case 0:
296 if ((mntsize = getmntinfo(&mntbuf,
297 verbose ? MNT_WAIT : MNT_NOWAIT)) == 0)
298 xo_err(1, "getmntinfo");
299 if (all) {
300 while ((fs = getfsent()) != NULL) {
301 if (BADTYPE(fs->fs_type))
302 continue;
303 if (checkvfsname(fs->fs_vfstype, vfslist))
304 continue;
305 if (hasopt(fs->fs_mntops, "noauto"))
306 continue;
307 if (!hasopt(fs->fs_mntops, "late") && onlylate)
308 continue;
309 if (hasopt(fs->fs_mntops, "late") && !late)
310 continue;
311 if (hasopt(fs->fs_mntops, "failok"))
312 failok = 1;
313 else
314 failok = 0;
315 if (!(init_flags & MNT_UPDATE) &&
316 !hasopt(fs->fs_mntops, "update") &&
317 ismounted(fs, mntbuf, mntsize))
318 continue;
319 options = update_options(options, fs->fs_mntops,
320 mntbuf->f_flags);
321 if (mountfs(fs->fs_vfstype, fs->fs_spec,
322 fs->fs_file, init_flags, options,
323 fs->fs_mntops) && !failok)
324 rval = EXIT_FAILURE;
325 }
326 } else if (fstab_style) {
327 xo_open_list("fstab");
328 for (i = 0; i < mntsize; i++) {
329 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
330 continue;
331 xo_open_instance("fstab");
332 putfsent(&mntbuf[i]);
333 xo_close_instance("fstab");
334 }
335 xo_close_list("fstab");
336 } else {
337 xo_open_list("mounted");
338 for (i = 0; i < mntsize; i++) {
339 if (checkvfsname(mntbuf[i].f_fstypename,
340 vfslist))
341 continue;
342 if (!verbose &&
343 (mntbuf[i].f_flags & MNT_IGNORE) != 0)
344 continue;
345 xo_open_instance("mounted");
346 prmount(&mntbuf[i]);
347 xo_close_instance("mounted");
348 }
349 xo_close_list("mounted");
350 }
351 EXIT(rval);
352 case 1:
353 if (vfslist != NULL)
354 usage();
355
356 rmslashes(*argv, *argv);
357 if (init_flags & MNT_UPDATE) {
358 mntfromname = NULL;
359 have_fstab = 0;
360 if ((mntbuf = getmntpoint(*argv)) == NULL)
361 xo_errx(1, "not currently mounted %s", *argv);
362 /*
363 * Only get the mntflags from fstab if both mntpoint
364 * and mntspec are identical. Also handle the special
365 * case where just '/' is mounted and 'spec' is not
366 * identical with the one from fstab ('/dev' is missing
367 * in the spec-string at boot-time).
368 */
369 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
370 if (strcmp(fs->fs_spec,
371 mntbuf->f_mntfromname) == 0 &&
372 strcmp(fs->fs_file,
373 mntbuf->f_mntonname) == 0) {
374 have_fstab = 1;
375 mntfromname = mntbuf->f_mntfromname;
376 } else if (argv[0][0] == '/' &&
377 argv[0][1] == '\0' &&
378 strcmp(fs->fs_vfstype,
379 mntbuf->f_fstypename) == 0) {
380 fs = getfsfile("/");
381 have_fstab = 1;
382 mntfromname = fs->fs_spec;
383 }
384 }
385 if (have_fstab) {
386 options = update_options(options, fs->fs_mntops,
387 mntbuf->f_flags);
388 } else {
389 mntfromname = mntbuf->f_mntfromname;
390 options = update_options(options, NULL,
391 mntbuf->f_flags);
392 }
393 rval = mountfs(mntbuf->f_fstypename, mntfromname,
394 mntbuf->f_mntonname, init_flags, options, 0);
395 break;
396 }
397 if ((fs = getfsfile(*argv)) == NULL &&
398 (fs = getfsspec(*argv)) == NULL)
399 xo_errx(1, "%s: unknown special file or file system",
400 *argv);
401 if (BADTYPE(fs->fs_type))
402 xo_errx(1, "%s has unknown file system type",
403 *argv);
404 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
405 init_flags, options, fs->fs_mntops);
406 break;
407 case 2:
408 /*
409 * If -t flag has not been specified, the path cannot be
410 * found, spec contains either a ':' or a '@', then assume
411 * that an NFS file system is being specified ala Sun.
412 * Check if the hostname contains only allowed characters
413 * to reduce false positives. IPv6 addresses containing
414 * ':' will be correctly parsed only if the separator is '@'.
415 * The definition of a valid hostname is taken from RFC 1034.
416 */
417 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL ||
418 (ep = strchr(argv[0], ':')) != NULL)) {
419 if (*ep == '@') {
420 cp = ep + 1;
421 ep = cp + strlen(cp);
422 } else
423 cp = argv[0];
424 while (cp != ep) {
425 if (!isdigit(*cp) && !isalpha(*cp) &&
426 *cp != '.' && *cp != '-' && *cp != ':')
427 break;
428 cp++;
429 }
430 if (cp == ep)
431 vfstype = "nfs";
432 }
433 rval = mountfs(vfstype,
434 argv[0], argv[1], init_flags, options, NULL);
435 break;
436 default:
437 usage();
438 /* NOTREACHED */
439 }
440
441 /*
442 * If the mount was successfully, and done by root, tell mountd the
443 * good news.
444 */
445 if (rval == EXIT_SUCCESS && getuid() == 0)
446 restart_mountd();
447
448 EXIT(rval);
449 }
450
451 int
ismounted(struct fstab * fs,struct statfs * mntbuf,int mntsize)452 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
453 {
454 char realfsfile[PATH_MAX];
455 int i;
456
457 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
458 /* the root file system can always be remounted */
459 return (0);
460
461 /* The user may have specified a symlink in fstab, resolve the path */
462 if (realpath(fs->fs_file, realfsfile) == NULL) {
463 /* Cannot resolve the path, use original one */
464 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile));
465 }
466
467 /*
468 * Consider the filesystem to be mounted if:
469 * It has the same mountpoint as a mounted filesystem, and
470 * It has the same type as that same mounted filesystem, and
471 * It has the same device name as that same mounted filesystem, OR
472 * It is a nonremountable filesystem
473 */
474 for (i = mntsize - 1; i >= 0; --i)
475 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
476 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 &&
477 (!isremountable(fs->fs_vfstype) ||
478 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)))
479 return (1);
480 return (0);
481 }
482
483 int
isremountable(const char * vfsname)484 isremountable(const char *vfsname)
485 {
486 const char **cp;
487
488 for (cp = remountable_fs_names; *cp; cp++)
489 if (strcmp(*cp, vfsname) == 0)
490 return (1);
491 return (0);
492 }
493
494 int
allow_file_mount(const char * vfsname)495 allow_file_mount(const char *vfsname)
496 {
497
498 if (strcmp(vfsname, "nullfs") == 0)
499 return (1);
500 return (0);
501 }
502
503 int
hasopt(const char * mntopts,const char * option)504 hasopt(const char *mntopts, const char *option)
505 {
506 int negative, found;
507 char *opt, *optbuf;
508
509 if (option[0] == 'n' && option[1] == 'o') {
510 negative = 1;
511 option += 2;
512 } else
513 negative = 0;
514 optbuf = strdup(mntopts);
515 found = 0;
516 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
517 if (opt[0] == 'n' && opt[1] == 'o') {
518 if (!strcasecmp(opt + 2, option))
519 found = negative;
520 } else if (!strcasecmp(opt, option))
521 found = !negative;
522 }
523 free(optbuf);
524 return (found);
525 }
526
527 static void
append_arg(struct cpa * sa,char * arg)528 append_arg(struct cpa *sa, char *arg)
529 {
530 if (sa->c + 1 == sa->sz) {
531 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2;
532 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz);
533 if (sa->a == NULL)
534 xo_errx(1, "realloc failed");
535 }
536 sa->a[++sa->c] = arg;
537 }
538
539 int
mountfs(const char * vfstype,const char * spec,const char * name,int flags,const char * options,const char * mntopts)540 mountfs(const char *vfstype, const char *spec, const char *name, int flags,
541 const char *options, const char *mntopts)
542 {
543 struct statfs sf;
544 int i, ret;
545 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
546 static struct cpa mnt_argv;
547
548 /* resolve the mountpoint with realpath(3) */
549 if (allow_file_mount(vfstype)) {
550 if (checkpath_allow_file(name, mntpath) != 0) {
551 xo_warn("%s", mntpath);
552 return (1);
553 }
554 } else {
555 if (checkpath(name, mntpath) != 0) {
556 xo_warn("%s", mntpath);
557 return (1);
558 }
559 }
560 name = mntpath;
561
562 if (mntopts == NULL)
563 mntopts = "";
564 optbuf = catopt(strdup(mntopts), options);
565
566 if (strcmp(name, "/") == 0)
567 flags |= MNT_UPDATE;
568 if (flags & MNT_FORCE)
569 optbuf = catopt(optbuf, "force");
570 if (flags & MNT_RDONLY)
571 optbuf = catopt(optbuf, "ro");
572 /*
573 * XXX
574 * The mount_mfs (newfs) command uses -o to select the
575 * optimization mode. We don't pass the default "-o rw"
576 * for that reason.
577 */
578 if (flags & MNT_UPDATE)
579 optbuf = catopt(optbuf, "update");
580
581 /* Compatibility glue. */
582 if (strcmp(vfstype, "msdos") == 0)
583 vfstype = "msdosfs";
584
585 /* Construct the name of the appropriate mount command */
586 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
587
588 mnt_argv.c = -1;
589 append_arg(&mnt_argv, execname);
590 mangle(optbuf, &mnt_argv);
591 if (mountprog != NULL)
592 strlcpy(execname, mountprog, sizeof(execname));
593
594 append_arg(&mnt_argv, strdup(spec));
595 append_arg(&mnt_argv, strdup(name));
596 append_arg(&mnt_argv, NULL);
597
598 if (debug) {
599 if (use_mountprog(vfstype))
600 xo_emit("{Lwc:exec}{:execname/%s}", execname);
601 else
602 xo_emit("{:execname/mount}{P: }{l:opts/-t}{P: }{l:opts/%s}", vfstype);
603 for (i = 1; i < mnt_argv.c; i++)
604 xo_emit("{P: }{l:opts}", mnt_argv.a[i]);
605 xo_emit("\n");
606 free(optbuf);
607 free(mountprog);
608 mountprog = NULL;
609 return (0);
610 }
611
612 if (use_mountprog(vfstype)) {
613 ret = exec_mountprog(name, execname, mnt_argv.a);
614 } else {
615 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a);
616 }
617
618 free(optbuf);
619 free(mountprog);
620 mountprog = NULL;
621
622 if (verbose) {
623 if (statfs(name, &sf) < 0) {
624 xo_warn("statfs %s", name);
625 return (1);
626 }
627 if (fstab_style) {
628 xo_open_list("fstab");
629 xo_open_instance("fstab");
630 putfsent(&sf);
631 xo_close_instance("fstab");
632 xo_close_list("fstab");
633 } else {
634 xo_open_list("mounted");
635 xo_open_instance("mounted");
636 prmount(&sf);
637 xo_close_instance("mounted");
638 xo_close_list("mounted");
639 }
640 }
641
642 return (ret);
643 }
644
645 void
prmount(struct statfs * sfp)646 prmount(struct statfs *sfp)
647 {
648 uint64_t flags;
649 unsigned int i;
650 struct mntoptnames *o;
651 struct passwd *pw;
652 char *fsidbuf;
653
654 xo_emit("{:special/%hs}{L: on }{:node/%hs}{L: (}{:fstype}", sfp->f_mntfromname,
655 sfp->f_mntonname, sfp->f_fstypename);
656
657 flags = sfp->f_flags & MNT_VISFLAGMASK;
658 for (o = optnames; flags != 0 && o->o_opt != 0; o++)
659 if (flags & o->o_opt) {
660 xo_emit("{D:, }{l:opts}", o->o_name);
661 flags &= ~o->o_opt;
662 }
663 /*
664 * Inform when file system is mounted by an unprivileged user
665 * or privileged non-root user.
666 */
667 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) {
668 xo_emit("{D:, }{L:mounted by }");
669 if ((pw = getpwuid(sfp->f_owner)) != NULL)
670 xo_emit("{:mounter/%hs}", pw->pw_name);
671 else
672 xo_emit("{:mounter/%hs}", sfp->f_owner);
673 }
674 if (verbose) {
675 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) {
676 xo_open_container("writes");
677 xo_emit("{D:, }{Lwc:writes}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}",
678 (uintmax_t)sfp->f_syncwrites,
679 (uintmax_t)sfp->f_asyncwrites);
680 xo_close_container("writes");
681 }
682 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) {
683 xo_open_container("reads");
684 xo_emit("{D:, }{Lwc:reads}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}",
685 (uintmax_t)sfp->f_syncreads,
686 (uintmax_t)sfp->f_asyncreads);
687 xo_close_container("reads");
688 }
689 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) {
690 fsidbuf = malloc(sizeof(sfp->f_fsid) * 2 + 1);
691 if (fsidbuf == NULL)
692 xo_errx(1, "malloc failed");
693 for (i = 0; i < sizeof(sfp->f_fsid); i++)
694 sprintf(&fsidbuf[i * 2], "%02x",
695 ((u_char *)&sfp->f_fsid)[i]);
696 fsidbuf[i * 2] = '\0';
697 xo_emit("{D:, }{Lw:fsid}{:fsid}", fsidbuf);
698 free(fsidbuf);
699 }
700 if (sfp->f_nvnodelistsize != 0) {
701 xo_open_container("vnodes");
702 xo_emit("{D:, }{Lwc:vnodes}{Lw:count}{w:count/%ju}",
703 (uintmax_t)sfp->f_nvnodelistsize);
704 xo_close_container("vnodes");
705 }
706 }
707 xo_emit("{D:)}\n");
708 }
709
710 char *
catopt(char * s0,const char * s1)711 catopt(char *s0, const char *s1)
712 {
713 char *cp;
714
715 if (s1 == NULL || *s1 == '\0')
716 return (s0);
717
718 if (s0 && *s0) {
719 if (asprintf(&cp, "%s,%s", s0, s1) == -1)
720 xo_errx(1, "asprintf failed");
721 } else
722 cp = strdup(s1);
723
724 if (s0)
725 free(s0);
726 return (cp);
727 }
728
729 void
mangle(char * options,struct cpa * a)730 mangle(char *options, struct cpa *a)
731 {
732 char *p, *s, *val;
733
734 for (s = options; (p = strsep(&s, ",")) != NULL;)
735 if (*p != '\0') {
736 if (strcmp(p, "noauto") == 0) {
737 /*
738 * Do not pass noauto option to nmount().
739 * or external mount program. noauto is
740 * only used to prevent mounting a filesystem
741 * when 'mount -a' is specified, and is
742 * not a real mount option.
743 */
744 continue;
745 } else if (strcmp(p, "late") == 0) {
746 /*
747 * "late" is used to prevent certain file
748 * systems from being mounted before late
749 * in the boot cycle; for instance,
750 * loopback NFS mounts can't be mounted
751 * before mountd starts.
752 */
753 continue;
754 } else if (strcmp(p, "failok") == 0) {
755 /*
756 * "failok" is used to prevent certain file
757 * systems from being causing the system to
758 * drop into single user mode in the boot
759 * cycle, and is not a real mount option.
760 */
761 continue;
762 } else if (strncmp(p, "mountprog", 9) == 0) {
763 /*
764 * "mountprog" is used to force the use of
765 * userland mount programs.
766 */
767 val = strchr(p, '=');
768 if (val != NULL) {
769 ++val;
770 if (*val != '\0')
771 mountprog = strdup(val);
772 }
773
774 if (mountprog == NULL) {
775 xo_errx(1, "Need value for -o mountprog");
776 }
777 continue;
778 } else if (strcmp(p, "userquota") == 0) {
779 continue;
780 } else if (strncmp(p, userquotaeq,
781 sizeof(userquotaeq) - 1) == 0) {
782 continue;
783 } else if (strcmp(p, "groupquota") == 0) {
784 continue;
785 } else if (strncmp(p, groupquotaeq,
786 sizeof(groupquotaeq) - 1) == 0) {
787 continue;
788 } else if (*p == '-') {
789 append_arg(a, p);
790 p = strchr(p, '=');
791 if (p != NULL) {
792 *p = '\0';
793 append_arg(a, p + 1);
794 }
795 } else {
796 append_arg(a, strdup("-o"));
797 append_arg(a, p);
798 }
799 }
800 }
801
802
803 char *
update_options(char * opts,char * fstab,int curflags)804 update_options(char *opts, char *fstab, int curflags)
805 {
806 char *o, *p;
807 char *cur;
808 char *expopt, *newopt, *tmpopt;
809
810 if (opts == NULL)
811 return (strdup(""));
812
813 /* remove meta options from list */
814 remopt(fstab, MOUNT_META_OPTION_FSTAB);
815 remopt(fstab, MOUNT_META_OPTION_CURRENT);
816 cur = flags2opts(curflags);
817
818 /*
819 * Expand all meta-options passed to us first.
820 */
821 expopt = NULL;
822 for (p = opts; (o = strsep(&p, ",")) != NULL;) {
823 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
824 expopt = catopt(expopt, fstab);
825 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
826 expopt = catopt(expopt, cur);
827 else
828 expopt = catopt(expopt, o);
829 }
830 free(cur);
831 free(opts);
832
833 /*
834 * Remove previous contradictory arguments. Given option "foo" we
835 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
836 * and "foo" - so we can deal with possible options like "notice".
837 */
838 newopt = NULL;
839 for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
840 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
841 xo_errx(1, "malloc failed");
842
843 strcpy(tmpopt, "no");
844 strcat(tmpopt, o);
845 remopt(newopt, tmpopt);
846 free(tmpopt);
847
848 if (strncmp("no", o, 2) == 0)
849 remopt(newopt, o+2);
850
851 newopt = catopt(newopt, o);
852 }
853 free(expopt);
854
855 return (newopt);
856 }
857
858 void
remopt(char * string,const char * opt)859 remopt(char *string, const char *opt)
860 {
861 char *o, *p, *r;
862
863 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
864 return;
865
866 r = string;
867
868 for (p = string; (o = strsep(&p, ",")) != NULL;) {
869 if (strcmp(opt, o) != 0) {
870 if (*r == ',' && *o != '\0')
871 r++;
872 while ((*r++ = *o++) != '\0')
873 ;
874 *--r = ',';
875 }
876 }
877 *r = '\0';
878 }
879
880 void
usage(void)881 usage(void)
882 {
883
884 xo_error("%s\n%s\n%s\n",
885 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]",
886 " mount [-dfpruvw] special | node",
887 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node");
888 EXIT(EXIT_FAILURE);
889 }
890
891 void
putfsent(struct statfs * ent)892 putfsent(struct statfs *ent)
893 {
894 struct fstab *fst;
895 char *opts, *rw;
896 int l;
897
898 opts = NULL;
899 /* flags2opts() doesn't return the "rw" option. */
900 if ((ent->f_flags & MNT_RDONLY) != 0)
901 rw = NULL;
902 else
903 rw = catopt(NULL, "rw");
904
905 opts = flags2opts(ent->f_flags);
906 opts = catopt(rw, opts);
907
908 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 ||
909 strncmp(ent->f_mntfromname, "<above>", 7) == 0) {
910 strlcpy(ent->f_mntfromname,
911 (strnstr(ent->f_mntfromname, ":", 8) +1),
912 sizeof(ent->f_mntfromname));
913 }
914
915 l = strlen(ent->f_mntfromname);
916 xo_emit("{:device}{P:/%s}{P:/%s}{P:/%s}",
917 ent->f_mntfromname,
918 l < 8 ? "\t" : "",
919 l < 16 ? "\t" : "",
920 l < 24 ? "\t" : " ");
921 l = strlen(ent->f_mntonname);
922 xo_emit("{:mntpoint}{P:/%s}{P:/%s}{P:/%s}",
923 ent->f_mntonname,
924 l < 8 ? "\t" : "",
925 l < 16 ? "\t" : "",
926 l < 24 ? "\t" : " ");
927 xo_emit("{:fstype}{P:\t}", ent->f_fstypename);
928 l = strlen(opts);
929 xo_emit("{:opts}{P:/%s}", opts,
930 l < 8 ? "\t" : " ");
931 free(opts);
932
933 if ((fst = getfsspec(ent->f_mntfromname)))
934 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n",
935 fst->fs_freq, fst->fs_passno);
936 else if ((fst = getfsfile(ent->f_mntonname)))
937 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n",
938 fst->fs_freq, fst->fs_passno);
939 else if (strcmp(ent->f_fstypename, "ufs") == 0) {
940 if (strcmp(ent->f_mntonname, "/") == 0)
941 xo_emit("{P:\t}{n:dump/1}{P: }{n:pass/1}\n");
942 else
943 xo_emit("{P:\t}{n:dump/2}{P: }{n:pass/2}\n");
944 } else
945 xo_emit("{P:\t}{n:dump/0}{P: }{n:pass/0}\n");
946 }
947
948
949 char *
flags2opts(int flags)950 flags2opts(int flags)
951 {
952 char *res;
953
954 res = NULL;
955
956 if (flags & MNT_RDONLY) res = catopt(res, "ro");
957 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
958 if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
959 if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
960 if (flags & MNT_UNION) res = catopt(res, "union");
961 if (flags & MNT_ASYNC) res = catopt(res, "async");
962 if (flags & MNT_NOATIME) res = catopt(res, "noatime");
963 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
964 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
965 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
966 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
967 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel");
968 if (flags & MNT_ACLS) res = catopt(res, "acls");
969 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls");
970 if (flags & MNT_UNTRUSTED) res = catopt(res, "untrusted");
971 if (flags & MNT_NOCOVER) res = catopt(res, "nocover");
972 if (flags & MNT_EMPTYDIR) res = catopt(res, "emptydir");
973
974 return (res);
975 }
976