1 /*-
2 * Copyright (c) 1980, 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static const char copyright[] =
32 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\
33 The Regents of the University of California. All rights reserved.\n";
34 #if 0
35 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95";
36 #endif
37 #endif /* not lint */
38
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
41
42 #include <sys/param.h>
43 #include <sys/mount.h>
44 #include <sys/stat.h>
45 #include <sys/wait.h>
46
47 #include <ctype.h>
48 #include <err.h>
49 #include <errno.h>
50 #include <fstab.h>
51 #include <paths.h>
52 #include <pwd.h>
53 #include <signal.h>
54 #include <stdint.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <unistd.h>
59 #include <libutil.h>
60
61 #include "extern.h"
62 #include "mntopts.h"
63 #include "pathnames.h"
64
65 /* `meta' options */
66 #define MOUNT_META_OPTION_FSTAB "fstab"
67 #define MOUNT_META_OPTION_CURRENT "current"
68
69 static int debug, fstab_style, verbose;
70
71 struct cpa {
72 char **a;
73 ssize_t sz;
74 int c;
75 };
76
77 char *catopt(char *, const char *);
78 struct statfs *getmntpt(const char *);
79 int hasopt(const char *, const char *);
80 int ismounted(struct fstab *, struct statfs *, int);
81 int isremountable(const char *);
82 void mangle(char *, struct cpa *);
83 char *update_options(char *, char *, int);
84 int mountfs(const char *, const char *, const char *,
85 int, const char *, const char *);
86 void remopt(char *, const char *);
87 void prmount(struct statfs *);
88 void putfsent(struct statfs *);
89 void usage(void);
90 char *flags2opts(int);
91
92 /* Map from mount options to printable formats. */
93 static struct opt {
94 uint64_t o_opt;
95 const char *o_name;
96 } optnames[] = {
97 { MNT_ASYNC, "asynchronous" },
98 { MNT_EXPORTED, "NFS exported" },
99 { MNT_LOCAL, "local" },
100 { MNT_NOATIME, "noatime" },
101 { MNT_NOEXEC, "noexec" },
102 { MNT_NOSUID, "nosuid" },
103 { MNT_NOSYMFOLLOW, "nosymfollow" },
104 { MNT_QUOTA, "with quotas" },
105 { MNT_RDONLY, "read-only" },
106 { MNT_SYNCHRONOUS, "synchronous" },
107 { MNT_UNION, "union" },
108 { MNT_NOCLUSTERR, "noclusterr" },
109 { MNT_NOCLUSTERW, "noclusterw" },
110 { MNT_SUIDDIR, "suiddir" },
111 { MNT_SOFTDEP, "soft-updates" },
112 { MNT_SUJ, "journaled soft-updates" },
113 { MNT_MULTILABEL, "multilabel" },
114 { MNT_ACLS, "acls" },
115 { MNT_NFS4ACLS, "nfsv4acls" },
116 { MNT_GJOURNAL, "gjournal" },
117 { MNT_AUTOMOUNTED, "automounted" },
118 { 0, NULL }
119 };
120
121 /*
122 * List of VFS types that can be remounted without becoming mounted on top
123 * of each other.
124 * XXX Is this list correct?
125 */
126 static const char *
127 remountable_fs_names[] = {
128 "ufs", "ffs", "ext2fs",
129 0
130 };
131
132 static const char userquotaeq[] = "userquota=";
133 static const char groupquotaeq[] = "groupquota=";
134
135 static char *mountprog = NULL;
136
137 static int
use_mountprog(const char * vfstype)138 use_mountprog(const char *vfstype)
139 {
140 /* XXX: We need to get away from implementing external mount
141 * programs for every filesystem, and move towards having
142 * each filesystem properly implement the nmount() system call.
143 */
144 unsigned int i;
145 const char *fs[] = {
146 "cd9660", "mfs", "msdosfs", "nfs",
147 "nullfs", "smbfs", "udf", "unionfs",
148 NULL
149 };
150
151 if (mountprog != NULL)
152 return (1);
153
154 for (i = 0; fs[i] != NULL; ++i) {
155 if (strcmp(vfstype, fs[i]) == 0)
156 return (1);
157 }
158
159 return (0);
160 }
161
162 static int
exec_mountprog(const char * name,const char * execname,char * const argv[])163 exec_mountprog(const char *name, const char *execname, char *const argv[])
164 {
165 pid_t pid;
166 int status;
167
168 switch (pid = fork()) {
169 case -1: /* Error. */
170 warn("fork");
171 exit (1);
172 case 0: /* Child. */
173 /* Go find an executable. */
174 execvP(execname, _PATH_SYSPATH, argv);
175 if (errno == ENOENT) {
176 warn("exec %s not found", execname);
177 if (execname[0] != '/') {
178 warnx("in path: %s", _PATH_SYSPATH);
179 }
180 }
181 exit(1);
182 default: /* Parent. */
183 if (waitpid(pid, &status, 0) < 0) {
184 warn("waitpid");
185 return (1);
186 }
187
188 if (WIFEXITED(status)) {
189 if (WEXITSTATUS(status) != 0)
190 return (WEXITSTATUS(status));
191 } else if (WIFSIGNALED(status)) {
192 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
193 return (1);
194 }
195 break;
196 }
197
198 return (0);
199 }
200
201 static int
specified_ro(const char * arg)202 specified_ro(const char *arg)
203 {
204 char *optbuf, *opt;
205 int ret = 0;
206
207 optbuf = strdup(arg);
208 if (optbuf == NULL)
209 err(1, NULL);
210
211 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
212 if (strcmp(opt, "ro") == 0) {
213 ret = 1;
214 break;
215 }
216 }
217 free(optbuf);
218 return (ret);
219 }
220
221 static void
restart_mountd(void)222 restart_mountd(void)
223 {
224 struct pidfh *pfh;
225 pid_t mountdpid;
226
227 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid);
228 if (pfh != NULL) {
229 /* Mountd is not running. */
230 pidfile_remove(pfh);
231 return;
232 }
233 if (errno != EEXIST) {
234 /* Cannot open pidfile for some reason. */
235 return;
236 }
237 /* We have mountd(8) PID in mountdpid varible, let's signal it. */
238 if (kill(mountdpid, SIGHUP) == -1)
239 err(1, "signal mountd");
240 }
241
242 int
main(int argc,char * argv[])243 main(int argc, char *argv[])
244 {
245 const char *mntfromname, **vfslist, *vfstype;
246 struct fstab *fs;
247 struct statfs *mntbuf;
248 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro;
249 int onlylate;
250 char *cp, *ep, *options;
251
252 all = init_flags = late = onlylate = 0;
253 ro = 0;
254 options = NULL;
255 vfslist = NULL;
256 vfstype = "ufs";
257 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1)
258 switch (ch) {
259 case 'a':
260 all = 1;
261 break;
262 case 'd':
263 debug = 1;
264 break;
265 case 'F':
266 setfstab(optarg);
267 break;
268 case 'f':
269 init_flags |= MNT_FORCE;
270 break;
271 case 'L':
272 onlylate = 1;
273 late = 1;
274 break;
275 case 'l':
276 late = 1;
277 break;
278 case 'n':
279 /* For compatibility with the Linux version of mount. */
280 break;
281 case 'o':
282 if (*optarg) {
283 options = catopt(options, optarg);
284 if (specified_ro(optarg))
285 ro = 1;
286 }
287 break;
288 case 'p':
289 fstab_style = 1;
290 verbose = 1;
291 break;
292 case 'r':
293 options = catopt(options, "ro");
294 ro = 1;
295 break;
296 case 't':
297 if (vfslist != NULL)
298 errx(1, "only one -t option may be specified");
299 vfslist = makevfslist(optarg);
300 vfstype = optarg;
301 break;
302 case 'u':
303 init_flags |= MNT_UPDATE;
304 break;
305 case 'v':
306 verbose = 1;
307 break;
308 case 'w':
309 options = catopt(options, "noro");
310 break;
311 case '?':
312 default:
313 usage();
314 /* NOTREACHED */
315 }
316 argc -= optind;
317 argv += optind;
318
319 #define BADTYPE(type) \
320 (strcmp(type, FSTAB_RO) && \
321 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
322
323 if ((init_flags & MNT_UPDATE) && (ro == 0))
324 options = catopt(options, "noro");
325
326 rval = 0;
327 switch (argc) {
328 case 0:
329 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
330 err(1, "getmntinfo");
331 if (all) {
332 while ((fs = getfsent()) != NULL) {
333 if (BADTYPE(fs->fs_type))
334 continue;
335 if (checkvfsname(fs->fs_vfstype, vfslist))
336 continue;
337 if (hasopt(fs->fs_mntops, "noauto"))
338 continue;
339 if (!hasopt(fs->fs_mntops, "late") && onlylate)
340 continue;
341 if (hasopt(fs->fs_mntops, "late") && !late)
342 continue;
343 if (hasopt(fs->fs_mntops, "failok"))
344 failok = 1;
345 else
346 failok = 0;
347 if (!(init_flags & MNT_UPDATE) &&
348 ismounted(fs, mntbuf, mntsize))
349 continue;
350 options = update_options(options, fs->fs_mntops,
351 mntbuf->f_flags);
352 if (mountfs(fs->fs_vfstype, fs->fs_spec,
353 fs->fs_file, init_flags, options,
354 fs->fs_mntops) && !failok)
355 rval = 1;
356 }
357 } else if (fstab_style) {
358 for (i = 0; i < mntsize; i++) {
359 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
360 continue;
361 putfsent(&mntbuf[i]);
362 }
363 } else {
364 for (i = 0; i < mntsize; i++) {
365 if (checkvfsname(mntbuf[i].f_fstypename,
366 vfslist))
367 continue;
368 if (!verbose &&
369 (mntbuf[i].f_flags & MNT_IGNORE) != 0)
370 continue;
371 prmount(&mntbuf[i]);
372 }
373 }
374 exit(rval);
375 case 1:
376 if (vfslist != NULL)
377 usage();
378
379 rmslashes(*argv, *argv);
380 if (init_flags & MNT_UPDATE) {
381 mntfromname = NULL;
382 have_fstab = 0;
383 if ((mntbuf = getmntpt(*argv)) == NULL)
384 errx(1, "not currently mounted %s", *argv);
385 /*
386 * Only get the mntflags from fstab if both mntpoint
387 * and mntspec are identical. Also handle the special
388 * case where just '/' is mounted and 'spec' is not
389 * identical with the one from fstab ('/dev' is missing
390 * in the spec-string at boot-time).
391 */
392 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
393 if (strcmp(fs->fs_spec,
394 mntbuf->f_mntfromname) == 0 &&
395 strcmp(fs->fs_file,
396 mntbuf->f_mntonname) == 0) {
397 have_fstab = 1;
398 mntfromname = mntbuf->f_mntfromname;
399 } else if (argv[0][0] == '/' &&
400 argv[0][1] == '\0') {
401 fs = getfsfile("/");
402 have_fstab = 1;
403 mntfromname = fs->fs_spec;
404 }
405 }
406 if (have_fstab) {
407 options = update_options(options, fs->fs_mntops,
408 mntbuf->f_flags);
409 } else {
410 mntfromname = mntbuf->f_mntfromname;
411 options = update_options(options, NULL,
412 mntbuf->f_flags);
413 }
414 rval = mountfs(mntbuf->f_fstypename, mntfromname,
415 mntbuf->f_mntonname, init_flags, options, 0);
416 break;
417 }
418 if ((fs = getfsfile(*argv)) == NULL &&
419 (fs = getfsspec(*argv)) == NULL)
420 errx(1, "%s: unknown special file or file system",
421 *argv);
422 if (BADTYPE(fs->fs_type))
423 errx(1, "%s has unknown file system type",
424 *argv);
425 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
426 init_flags, options, fs->fs_mntops);
427 break;
428 case 2:
429 /*
430 * If -t flag has not been specified, the path cannot be
431 * found, spec contains either a ':' or a '@', then assume
432 * that an NFS file system is being specified ala Sun.
433 * Check if the hostname contains only allowed characters
434 * to reduce false positives. IPv6 addresses containing
435 * ':' will be correctly parsed only if the separator is '@'.
436 * The definition of a valid hostname is taken from RFC 1034.
437 */
438 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL ||
439 (ep = strchr(argv[0], ':')) != NULL)) {
440 if (*ep == '@') {
441 cp = ep + 1;
442 ep = cp + strlen(cp);
443 } else
444 cp = argv[0];
445 while (cp != ep) {
446 if (!isdigit(*cp) && !isalpha(*cp) &&
447 *cp != '.' && *cp != '-' && *cp != ':')
448 break;
449 cp++;
450 }
451 if (cp == ep)
452 vfstype = "nfs";
453 }
454 rval = mountfs(vfstype,
455 argv[0], argv[1], init_flags, options, NULL);
456 break;
457 default:
458 usage();
459 /* NOTREACHED */
460 }
461
462 /*
463 * If the mount was successfully, and done by root, tell mountd the
464 * good news.
465 */
466 if (rval == 0 && getuid() == 0)
467 restart_mountd();
468
469 exit(rval);
470 }
471
472 int
ismounted(struct fstab * fs,struct statfs * mntbuf,int mntsize)473 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
474 {
475 char realfsfile[PATH_MAX];
476 int i;
477
478 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
479 /* the root file system can always be remounted */
480 return (0);
481
482 /* The user may have specified a symlink in fstab, resolve the path */
483 if (realpath(fs->fs_file, realfsfile) == NULL) {
484 /* Cannot resolve the path, use original one */
485 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile));
486 }
487
488 /*
489 * Consider the filesystem to be mounted if:
490 * It has the same mountpoint as a mounted filesytem, and
491 * It has the same type as that same mounted filesystem, and
492 * It has the same device name as that same mounted filesystem, OR
493 * It is a nonremountable filesystem
494 */
495 for (i = mntsize - 1; i >= 0; --i)
496 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
497 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 &&
498 (!isremountable(fs->fs_vfstype) ||
499 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)))
500 return (1);
501 return (0);
502 }
503
504 int
isremountable(const char * vfsname)505 isremountable(const char *vfsname)
506 {
507 const char **cp;
508
509 for (cp = remountable_fs_names; *cp; cp++)
510 if (strcmp(*cp, vfsname) == 0)
511 return (1);
512 return (0);
513 }
514
515 int
hasopt(const char * mntopts,const char * option)516 hasopt(const char *mntopts, const char *option)
517 {
518 int negative, found;
519 char *opt, *optbuf;
520
521 if (option[0] == 'n' && option[1] == 'o') {
522 negative = 1;
523 option += 2;
524 } else
525 negative = 0;
526 optbuf = strdup(mntopts);
527 found = 0;
528 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
529 if (opt[0] == 'n' && opt[1] == 'o') {
530 if (!strcasecmp(opt + 2, option))
531 found = negative;
532 } else if (!strcasecmp(opt, option))
533 found = !negative;
534 }
535 free(optbuf);
536 return (found);
537 }
538
539 static void
append_arg(struct cpa * sa,char * arg)540 append_arg(struct cpa *sa, char *arg)
541 {
542 if (sa->c + 1 == sa->sz) {
543 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2;
544 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz);
545 if (sa->a == NULL)
546 errx(1, "realloc failed");
547 }
548 sa->a[++sa->c] = arg;
549 }
550
551 int
mountfs(const char * vfstype,const char * spec,const char * name,int flags,const char * options,const char * mntopts)552 mountfs(const char *vfstype, const char *spec, const char *name, int flags,
553 const char *options, const char *mntopts)
554 {
555 struct statfs sf;
556 int i, ret;
557 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
558 static struct cpa mnt_argv;
559
560 /* resolve the mountpoint with realpath(3) */
561 if (checkpath(name, mntpath) != 0) {
562 warn("%s", mntpath);
563 return (1);
564 }
565 name = mntpath;
566
567 if (mntopts == NULL)
568 mntopts = "";
569 optbuf = catopt(strdup(mntopts), options);
570
571 if (strcmp(name, "/") == 0)
572 flags |= MNT_UPDATE;
573 if (flags & MNT_FORCE)
574 optbuf = catopt(optbuf, "force");
575 if (flags & MNT_RDONLY)
576 optbuf = catopt(optbuf, "ro");
577 /*
578 * XXX
579 * The mount_mfs (newfs) command uses -o to select the
580 * optimization mode. We don't pass the default "-o rw"
581 * for that reason.
582 */
583 if (flags & MNT_UPDATE)
584 optbuf = catopt(optbuf, "update");
585
586 /* Compatibility glue. */
587 if (strcmp(vfstype, "msdos") == 0) {
588 warnx(
589 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated.");
590 vfstype = "msdosfs";
591 }
592
593 /* Construct the name of the appropriate mount command */
594 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
595
596 mnt_argv.c = -1;
597 append_arg(&mnt_argv, execname);
598 mangle(optbuf, &mnt_argv);
599 if (mountprog != NULL)
600 strcpy(execname, mountprog);
601
602 append_arg(&mnt_argv, strdup(spec));
603 append_arg(&mnt_argv, strdup(name));
604 append_arg(&mnt_argv, NULL);
605
606 if (debug) {
607 if (use_mountprog(vfstype))
608 printf("exec: %s", execname);
609 else
610 printf("mount -t %s", vfstype);
611 for (i = 1; i < mnt_argv.c; i++)
612 (void)printf(" %s", mnt_argv.a[i]);
613 (void)printf("\n");
614 free(optbuf);
615 free(mountprog);
616 mountprog = NULL;
617 return (0);
618 }
619
620 if (use_mountprog(vfstype)) {
621 ret = exec_mountprog(name, execname, mnt_argv.a);
622 } else {
623 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a);
624 }
625
626 free(optbuf);
627 free(mountprog);
628 mountprog = NULL;
629
630 if (verbose) {
631 if (statfs(name, &sf) < 0) {
632 warn("statfs %s", name);
633 return (1);
634 }
635 if (fstab_style)
636 putfsent(&sf);
637 else
638 prmount(&sf);
639 }
640
641 return (ret);
642 }
643
644 void
prmount(struct statfs * sfp)645 prmount(struct statfs *sfp)
646 {
647 uint64_t flags;
648 unsigned int i;
649 struct opt *o;
650 struct passwd *pw;
651
652 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
653 sfp->f_fstypename);
654
655 flags = sfp->f_flags & MNT_VISFLAGMASK;
656 for (o = optnames; flags != 0 && o->o_opt != 0; o++)
657 if (flags & o->o_opt) {
658 (void)printf(", %s", o->o_name);
659 flags &= ~o->o_opt;
660 }
661 /*
662 * Inform when file system is mounted by an unprivileged user
663 * or privileged non-root user.
664 */
665 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) {
666 (void)printf(", mounted by ");
667 if ((pw = getpwuid(sfp->f_owner)) != NULL)
668 (void)printf("%s", pw->pw_name);
669 else
670 (void)printf("%d", sfp->f_owner);
671 }
672 if (verbose) {
673 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
674 (void)printf(", writes: sync %ju async %ju",
675 (uintmax_t)sfp->f_syncwrites,
676 (uintmax_t)sfp->f_asyncwrites);
677 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
678 (void)printf(", reads: sync %ju async %ju",
679 (uintmax_t)sfp->f_syncreads,
680 (uintmax_t)sfp->f_asyncreads);
681 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) {
682 printf(", fsid ");
683 for (i = 0; i < sizeof(sfp->f_fsid); i++)
684 printf("%02x", ((u_char *)&sfp->f_fsid)[i]);
685 }
686 }
687 (void)printf(")\n");
688 }
689
690 struct statfs *
getmntpt(const char * name)691 getmntpt(const char *name)
692 {
693 struct statfs *mntbuf;
694 int i, mntsize;
695
696 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
697 for (i = mntsize - 1; i >= 0; i--) {
698 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
699 strcmp(mntbuf[i].f_mntonname, name) == 0)
700 return (&mntbuf[i]);
701 }
702 return (NULL);
703 }
704
705 char *
catopt(char * s0,const char * s1)706 catopt(char *s0, const char *s1)
707 {
708 size_t i;
709 char *cp;
710
711 if (s1 == NULL || *s1 == '\0')
712 return (s0);
713
714 if (s0 && *s0) {
715 i = strlen(s0) + strlen(s1) + 1 + 1;
716 if ((cp = malloc(i)) == NULL)
717 errx(1, "malloc failed");
718 (void)snprintf(cp, i, "%s,%s", s0, s1);
719 } else
720 cp = strdup(s1);
721
722 if (s0)
723 free(s0);
724 return (cp);
725 }
726
727 void
mangle(char * options,struct cpa * a)728 mangle(char *options, struct cpa *a)
729 {
730 char *p, *s, *val;
731
732 for (s = options; (p = strsep(&s, ",")) != NULL;)
733 if (*p != '\0') {
734 if (strcmp(p, "noauto") == 0) {
735 /*
736 * Do not pass noauto option to nmount().
737 * or external mount program. noauto is
738 * only used to prevent mounting a filesystem
739 * when 'mount -a' is specified, and is
740 * not a real mount option.
741 */
742 continue;
743 } else if (strcmp(p, "late") == 0) {
744 /*
745 * "late" is used to prevent certain file
746 * systems from being mounted before late
747 * in the boot cycle; for instance,
748 * loopback NFS mounts can't be mounted
749 * before mountd starts.
750 */
751 continue;
752 } else if (strcmp(p, "failok") == 0) {
753 /*
754 * "failok" is used to prevent certain file
755 * systems from being causing the system to
756 * drop into single user mode in the boot
757 * cycle, and is not a real mount option.
758 */
759 continue;
760 } else if (strncmp(p, "mountprog", 9) == 0) {
761 /*
762 * "mountprog" is used to force the use of
763 * userland mount programs.
764 */
765 val = strchr(p, '=');
766 if (val != NULL) {
767 ++val;
768 if (*val != '\0')
769 mountprog = strdup(val);
770 }
771
772 if (mountprog == NULL) {
773 errx(1, "Need value for -o mountprog");
774 }
775 continue;
776 } else if (strcmp(p, "userquota") == 0) {
777 continue;
778 } else if (strncmp(p, userquotaeq,
779 sizeof(userquotaeq) - 1) == 0) {
780 continue;
781 } else if (strcmp(p, "groupquota") == 0) {
782 continue;
783 } else if (strncmp(p, groupquotaeq,
784 sizeof(groupquotaeq) - 1) == 0) {
785 continue;
786 } else if (*p == '-') {
787 append_arg(a, p);
788 p = strchr(p, '=');
789 if (p != NULL) {
790 *p = '\0';
791 append_arg(a, p + 1);
792 }
793 } else {
794 append_arg(a, strdup("-o"));
795 append_arg(a, p);
796 }
797 }
798 }
799
800
801 char *
update_options(char * opts,char * fstab,int curflags)802 update_options(char *opts, char *fstab, int curflags)
803 {
804 char *o, *p;
805 char *cur;
806 char *expopt, *newopt, *tmpopt;
807
808 if (opts == NULL)
809 return (strdup(""));
810
811 /* remove meta options from list */
812 remopt(fstab, MOUNT_META_OPTION_FSTAB);
813 remopt(fstab, MOUNT_META_OPTION_CURRENT);
814 cur = flags2opts(curflags);
815
816 /*
817 * Expand all meta-options passed to us first.
818 */
819 expopt = NULL;
820 for (p = opts; (o = strsep(&p, ",")) != NULL;) {
821 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
822 expopt = catopt(expopt, fstab);
823 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
824 expopt = catopt(expopt, cur);
825 else
826 expopt = catopt(expopt, o);
827 }
828 free(cur);
829 free(opts);
830
831 /*
832 * Remove previous contradictory arguments. Given option "foo" we
833 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
834 * and "foo" - so we can deal with possible options like "notice".
835 */
836 newopt = NULL;
837 for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
838 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
839 errx(1, "malloc failed");
840
841 strcpy(tmpopt, "no");
842 strcat(tmpopt, o);
843 remopt(newopt, tmpopt);
844 free(tmpopt);
845
846 if (strncmp("no", o, 2) == 0)
847 remopt(newopt, o+2);
848
849 newopt = catopt(newopt, o);
850 }
851 free(expopt);
852
853 return (newopt);
854 }
855
856 void
remopt(char * string,const char * opt)857 remopt(char *string, const char *opt)
858 {
859 char *o, *p, *r;
860
861 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
862 return;
863
864 r = string;
865
866 for (p = string; (o = strsep(&p, ",")) != NULL;) {
867 if (strcmp(opt, o) != 0) {
868 if (*r == ',' && *o != '\0')
869 r++;
870 while ((*r++ = *o++) != '\0')
871 ;
872 *--r = ',';
873 }
874 }
875 *r = '\0';
876 }
877
878 void
usage(void)879 usage(void)
880 {
881
882 (void)fprintf(stderr, "%s\n%s\n%s\n",
883 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]",
884 " mount [-dfpruvw] special | node",
885 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node");
886 exit(1);
887 }
888
889 void
putfsent(struct statfs * ent)890 putfsent(struct statfs *ent)
891 {
892 struct fstab *fst;
893 char *opts, *rw;
894 int l;
895
896 opts = NULL;
897 /* flags2opts() doesn't return the "rw" option. */
898 if ((ent->f_flags & MNT_RDONLY) != 0)
899 rw = NULL;
900 else
901 rw = catopt(NULL, "rw");
902
903 opts = flags2opts(ent->f_flags);
904 opts = catopt(rw, opts);
905
906 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 ||
907 strncmp(ent->f_mntfromname, "<above>", 7) == 0) {
908 strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8)
909 +1));
910 }
911
912 l = strlen(ent->f_mntfromname);
913 printf("%s%s%s%s", ent->f_mntfromname,
914 l < 8 ? "\t" : "",
915 l < 16 ? "\t" : "",
916 l < 24 ? "\t" : " ");
917 l = strlen(ent->f_mntonname);
918 printf("%s%s%s%s", ent->f_mntonname,
919 l < 8 ? "\t" : "",
920 l < 16 ? "\t" : "",
921 l < 24 ? "\t" : " ");
922 printf("%s\t", ent->f_fstypename);
923 l = strlen(opts);
924 printf("%s%s", opts,
925 l < 8 ? "\t" : " ");
926 free(opts);
927
928 if ((fst = getfsspec(ent->f_mntfromname)))
929 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
930 else if ((fst = getfsfile(ent->f_mntonname)))
931 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
932 else if (strcmp(ent->f_fstypename, "ufs") == 0) {
933 if (strcmp(ent->f_mntonname, "/") == 0)
934 printf("\t1 1\n");
935 else
936 printf("\t2 2\n");
937 } else
938 printf("\t0 0\n");
939 }
940
941
942 char *
flags2opts(int flags)943 flags2opts(int flags)
944 {
945 char *res;
946
947 res = NULL;
948
949 if (flags & MNT_RDONLY) res = catopt(res, "ro");
950 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
951 if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
952 if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
953 if (flags & MNT_UNION) res = catopt(res, "union");
954 if (flags & MNT_ASYNC) res = catopt(res, "async");
955 if (flags & MNT_NOATIME) res = catopt(res, "noatime");
956 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
957 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
958 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
959 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
960 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel");
961 if (flags & MNT_ACLS) res = catopt(res, "acls");
962 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls");
963
964 return (res);
965 }
966