2 * Copyright (c) 1980, 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1980, 1989, 1993, 1994 The Regents of the University of California. All rights reserved.
34 * @(#)mount.c 8.25 (Berkeley) 5/8/95
35 * $FreeBSD: src/sbin/mount/mount.c,v 1.39.2.3 2001/08/01 08:26:23 obrien Exp $
36 * $DragonFly: src/sbin/mount/mount.c,v 1.10 2005/04/03 17:13:08 joerg Exp $
39 #include <sys/param.h>
40 #include <sys/mount.h>
56 #include "pathnames.h"
59 #define MOUNT_META_OPTION_FSTAB "fstab"
60 #define MOUNT_META_OPTION_CURRENT "current"
62 int debug
, fstab_style
, verbose
;
64 static char *catopt(char *, const char *);
66 *getmntpt(const char *);
67 static int hasopt(const char *, const char *);
68 static int ismounted(struct fstab
*, struct statfs
*, int);
69 static int isremountable(const char *);
70 static void mangle(char *, int *, const char **);
71 static char *update_options(char *, char *, int);
72 static int mountfs(const char *, const char *, const char *,
73 int, const char *, const char *);
74 static void remopt(char *, const char *);
75 static void printdefvals(const struct statfs
*);
76 static void prmount(struct statfs
*);
77 static void putfsent(const struct statfs
*);
78 static void usage(void);
79 static char *flags2opts(int);
80 static char *xstrdup(const char *str
);
82 /* Map from mount options to printable formats. */
87 { MNT_ASYNC
, "asynchronous" },
88 { MNT_EXPORTED
, "NFS exported" },
89 { MNT_LOCAL
, "local" },
90 { MNT_NOATIME
, "noatime" },
91 { MNT_NODEV
, "nodev" },
92 { MNT_NOEXEC
, "noexec" },
93 { MNT_NOSUID
, "nosuid" },
94 { MNT_NOSYMFOLLOW
, "nosymfollow" },
95 { MNT_QUOTA
, "with quotas" },
96 { MNT_RDONLY
, "read-only" },
97 { MNT_SYNCHRONOUS
, "synchronous" },
98 { MNT_UNION
, "union" },
99 { MNT_NOCLUSTERR
, "noclusterr" },
100 { MNT_NOCLUSTERW
, "noclusterw" },
101 { MNT_SUIDDIR
, "suiddir" },
102 { MNT_SOFTDEP
, "soft-updates" },
103 { MNT_IGNORE
, "ignore" },
108 * List of VFS types that can be remounted without becoming mounted on top
110 * XXX Is this list correct?
113 remountable_fs_names
[] = {
114 "ufs", "ffs", "ext2fs",
119 main(int argc
, char **argv
)
121 const char *mntfromname
, **vfslist
, *vfstype
;
123 struct statfs
*mntbuf
;
126 int all
, ch
, i
, init_flags
, mntsize
, rval
, have_fstab
;
129 all
= init_flags
= 0;
133 while ((ch
= getopt(argc
, argv
, "adfo:prwt:uv")) != -1)
142 init_flags
|= MNT_FORCE
;
146 options
= catopt(options
, optarg
);
153 options
= catopt(options
, "ro");
157 errx(1, "only one -t option may be specified");
158 vfslist
= makevfslist(optarg
);
162 init_flags
|= MNT_UPDATE
;
168 options
= catopt(options
, "noro");
178 #define BADTYPE(type) \
179 (strcmp(type, FSTAB_RO) && \
180 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
185 if ((mntsize
= getmntinfo(&mntbuf
, MNT_NOWAIT
)) == 0)
186 err(1, "getmntinfo");
188 while ((fs
= getfsent()) != NULL
) {
189 if (BADTYPE(fs
->fs_type
))
191 if (checkvfsname(fs
->fs_vfstype
, vfslist
))
193 if (hasopt(fs
->fs_mntops
, "noauto"))
195 if (!(init_flags
& MNT_UPDATE
) &&
196 ismounted(fs
, mntbuf
, mntsize
))
198 options
= update_options(options
,
199 fs
->fs_mntops
, mntbuf
->f_flags
);
200 if (mountfs(fs
->fs_vfstype
, fs
->fs_spec
,
201 fs
->fs_file
, init_flags
, options
,
205 } else if (fstab_style
) {
206 for (i
= 0; i
< mntsize
; i
++) {
207 if (checkvfsname(mntbuf
[i
].f_fstypename
, vfslist
))
209 putfsent(&mntbuf
[i
]);
212 for (i
= 0; i
< mntsize
; i
++) {
213 if (checkvfsname(mntbuf
[i
].f_fstypename
,
224 rmslashes(*argv
, *argv
);
226 if (init_flags
& MNT_UPDATE
) {
229 if ((mntbuf
= getmntpt(*argv
)) == NULL
)
230 errx(1, "not currently mounted %s", *argv
);
232 * Only get the mntflags from fstab if both mntpoint
233 * and mntspec are identical. Also handle the special
234 * case where just '/' is mounted and 'spec' is not
235 * identical with the one from fstab ('/dev' is missing
236 * in the spec-string at boot-time).
238 if ((fs
= getfsfile(mntbuf
->f_mntonname
)) != NULL
) {
239 if (strcmp(fs
->fs_spec
,
240 mntbuf
->f_mntfromname
) == 0 &&
242 mntbuf
->f_mntonname
) == 0) {
244 mntfromname
= mntbuf
->f_mntfromname
;
245 } else if (argv
[0][0] == '/' &&
246 argv
[0][1] == '\0') {
249 mntfromname
= fs
->fs_spec
;
253 options
= update_options(options
, fs
->fs_mntops
,
256 mntfromname
= mntbuf
->f_mntfromname
;
257 options
= update_options(options
, NULL
,
260 rval
= mountfs(mntbuf
->f_fstypename
, mntfromname
,
261 mntbuf
->f_mntonname
, init_flags
, options
, 0);
264 if ((fs
= getfsfile(*argv
)) == NULL
&&
265 (fs
= getfsspec(*argv
)) == NULL
)
266 errx(1, "%s: unknown special file or file system",
268 if (BADTYPE(fs
->fs_type
))
269 errx(1, "%s has unknown file system type",
271 rval
= mountfs(fs
->fs_vfstype
, fs
->fs_spec
, fs
->fs_file
,
272 init_flags
, options
, fs
->fs_mntops
);
276 * If -t flag has not been specified, the path cannot be
277 * found, spec contains either a ':' or a '@', and the
278 * spec is not a file with those characters, then assume
279 * that an NFS filesystem is being specified ala Sun.
281 if (vfslist
== NULL
&& strpbrk(argv
[0], ":@") != NULL
&&
282 access(argv
[0], 0) == -1)
284 rval
= mountfs(vfstype
, getdevpath(argv
[0], 0), argv
[1],
285 init_flags
, options
, NULL
);
293 * If the mount was successfully, and done by root, tell mountd the
294 * good news. Pid checks are probably unnecessary, but don't hurt.
296 if (rval
== 0 && getuid() == 0 &&
297 (mountdfp
= fopen(_PATH_MOUNTDPID
, "r")) != NULL
) {
298 if (fscanf(mountdfp
, "%d", &pid
) == 1 &&
299 pid
> 0 && kill(pid
, SIGHUP
) == -1 && errno
!= ESRCH
)
300 err(1, "signal mountd");
308 ismounted(struct fstab
*fs
, struct statfs
*mntbuf
, int mntsize
)
312 if (fs
->fs_file
[0] == '/' && fs
->fs_file
[1] == '\0')
313 /* the root file system can always be remounted */
316 for (i
= mntsize
- 1; i
>= 0; --i
)
317 if (strcmp(fs
->fs_file
, mntbuf
[i
].f_mntonname
) == 0 &&
318 (!isremountable(fs
->fs_vfstype
) ||
319 strcmp(fs
->fs_spec
, mntbuf
[i
].f_mntfromname
) == 0))
325 isremountable(const char *vfsname
)
329 for (cp
= remountable_fs_names
; *cp
; cp
++)
330 if (strcmp(*cp
, vfsname
) == 0)
336 hasopt(const char *mntopts
, const char *option
)
341 if (option
[0] == 'n' && option
[1] == 'o') {
346 optbuf
= xstrdup(mntopts
);
348 for (opt
= optbuf
; (opt
= strtok(opt
, ",")) != NULL
; opt
= NULL
) {
349 if (opt
[0] == 'n' && opt
[1] == 'o') {
350 if (!strcasecmp(opt
+ 2, option
))
352 } else if (!strcasecmp(opt
, option
))
360 mountfs(const char *vfstype
, const char *spec
, const char *name
, int flags
,
361 const char *options
, const char *mntopts
)
363 /* List of directories containing mount_xxx subcommands. */
364 static const char *edirs
[] = {
369 const char *argv
[100], **edir
;
373 char *optbuf
, execname
[MAXPATHLEN
+ 1], mntpath
[MAXPATHLEN
];
380 /* resolve the mountpoint with realpath(3) */
381 checkpath(name
, mntpath
);
386 if (options
== NULL
) {
387 if (*mntopts
== '\0') {
394 optbuf
= catopt(xstrdup(mntopts
), options
);
396 if (strcmp(name
, "/") == 0)
398 if (flags
& MNT_FORCE
)
399 optbuf
= catopt(optbuf
, "force");
400 if (flags
& MNT_RDONLY
)
401 optbuf
= catopt(optbuf
, "ro");
404 * The mount_mfs (newfs) command uses -o to select the
405 * optimization mode. We don't pass the default "-o rw"
408 if (flags
& MNT_UPDATE
)
409 optbuf
= catopt(optbuf
, "update");
412 argv
[argc
++] = vfstype
;
413 mangle(optbuf
, &argc
, argv
);
419 printf("exec: mount_%s", vfstype
);
420 for (i
= 1; i
< argc
; i
++)
421 printf(" %s", argv
[i
]);
426 switch (pid
= fork()) {
427 case -1: /* Error. */
432 if (strcmp(vfstype
, "ufs") == 0)
433 exit(mount_ufs(argc
, argv
));
435 /* Go find an executable. */
436 for (edir
= edirs
; *edir
; edir
++) {
438 sizeof(execname
), "%s/mount_%s", *edir
, vfstype
);
439 execv(execname
, __DECONST(char * const *, argv
));
441 if (errno
== ENOENT
) {
444 for (edir
= edirs
; *edir
; edir
++)
445 len
+= strlen(*edir
) + 2; /* ", " */
446 if ((cp
= malloc(len
)) == NULL
)
447 errx(1, "malloc failed");
449 for (edir
= edirs
; *edir
; edir
++) {
454 warn("exec mount_%s not found in %s", vfstype
, cp
);
458 default: /* Parent. */
461 if (waitpid(pid
, &status
, 0) < 0) {
466 if (WIFEXITED(status
)) {
467 if (WEXITSTATUS(status
) != 0)
468 return (WEXITSTATUS(status
));
469 } else if (WIFSIGNALED(status
)) {
470 warnx("%s: %s", name
, sys_siglist
[WTERMSIG(status
)]);
475 if (statfs(name
, &sf
) < 0) {
476 warn("statfs %s", name
);
491 prmount(struct statfs
*sfp
)
497 printf("%s on %s (%s", sfp
->f_mntfromname
, sfp
->f_mntonname
,
500 flags
= sfp
->f_flags
& MNT_VISFLAGMASK
;
501 for (o
= optnames
; flags
&& o
->o_opt
; o
++)
502 if (flags
& o
->o_opt
) {
503 printf(", %s", o
->o_name
);
507 printf(", mounted by ");
508 if ((pw
= getpwuid(sfp
->f_owner
)) != NULL
)
509 printf("%s", pw
->pw_name
);
511 printf("%d", sfp
->f_owner
);
514 if (sfp
->f_syncwrites
!= 0 || sfp
->f_asyncwrites
!= 0)
515 printf(", writes: sync %ld async %ld",
516 sfp
->f_syncwrites
, sfp
->f_asyncwrites
);
517 if (sfp
->f_syncreads
!= 0 || sfp
->f_asyncreads
!= 0)
518 printf(", reads: sync %ld async %ld",
519 sfp
->f_syncreads
, sfp
->f_asyncreads
);
524 static struct statfs
*
525 getmntpt(const char *name
)
527 struct statfs
*mntbuf
;
530 mntsize
= getmntinfo(&mntbuf
, MNT_NOWAIT
);
531 for (i
= mntsize
- 1; i
>= 0; i
--) {
532 if (strcmp(mntbuf
[i
].f_mntfromname
, name
) == 0 ||
533 strcmp(mntbuf
[i
].f_mntonname
, name
) == 0)
540 catopt(char *s0
, const char *s1
)
545 if (s1
== NULL
|| *s1
== '\0')
549 i
= strlen(s0
) + strlen(s1
) + 1 + 1;
550 if ((cp
= malloc(i
)) == NULL
)
551 errx(1, "malloc failed");
552 snprintf(cp
, i
, "%s,%s", s0
, s1
);
562 mangle(char *options
, int *argcp
, const char **argv
)
568 for (s
= options
; (p
= strsep(&s
, ",")) != NULL
;)
577 } else if (strcmp(p
, "rw") != 0) {
588 update_options(char *opts
, char *fstab
, int curflags
)
592 char *expopt
, *newopt
, *tmpopt
;
597 /* remove meta options from list */
598 remopt(fstab
, MOUNT_META_OPTION_FSTAB
);
599 remopt(fstab
, MOUNT_META_OPTION_CURRENT
);
600 cur
= flags2opts(curflags
);
603 * Expand all meta-options passed to us first.
606 for (p
= opts
; (o
= strsep(&p
, ",")) != NULL
;) {
607 if (strcmp(MOUNT_META_OPTION_FSTAB
, o
) == 0)
608 expopt
= catopt(expopt
, fstab
);
609 else if (strcmp(MOUNT_META_OPTION_CURRENT
, o
) == 0)
610 expopt
= catopt(expopt
, cur
);
612 expopt
= catopt(expopt
, o
);
618 * Remove previous contradictory arguments. Given option "foo" we
619 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
620 * and "foo" - so we can deal with possible options like "notice".
623 for (p
= expopt
; (o
= strsep(&p
, ",")) != NULL
;) {
624 if ((tmpopt
= malloc( strlen(o
) + 2 + 1 )) == NULL
)
625 errx(1, "malloc failed");
627 strcpy(tmpopt
, "no");
629 remopt(newopt
, tmpopt
);
632 if (strncmp("no", o
, 2) == 0)
635 newopt
= catopt(newopt
, o
);
643 remopt(char *string
, const char *opt
)
647 if (string
== NULL
|| *string
== '\0' || opt
== NULL
|| *opt
== '\0')
652 for (p
= string
; (o
= strsep(&p
, ",")) != NULL
;) {
653 if (strcmp(opt
, o
) != 0) {
654 if (*r
== ',' && *o
!= '\0')
656 while ((*r
++ = *o
++) != '\0')
668 fprintf(stderr
, "%s\n%s\n%s\n",
669 "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node",
670 " mount [-adfpruvw] [-o options] [-t ufs | external_type]",
671 " mount [-dfpruvw] special | node");
676 * Prints the default values for dump frequency and pass number of fsck.
677 * This happens when mount(8) is called with -p and there is no fstab file
678 * or there is but the values aren't specified.
681 printdefvals(const struct statfs
*ent
)
683 if (strcmp(ent
->f_fstypename
, "ufs") == 0) {
684 if (strcmp(ent
->f_mntonname
, "/") == 0)
694 putfsent(const struct statfs
*ent
)
700 opts
= flags2opts(ent
->f_flags
);
701 printf("%s\t%s\t%s %s", ent
->f_mntfromname
, ent
->f_mntonname
,
702 ent
->f_fstypename
, opts
);
706 * If fstab file is missing don't call getfsspec() or getfsfile()
707 * at all, because the same warning will be printed twice for every
708 * mounted filesystem.
710 if (stat(_PATH_FSTAB
, &sb
) != -1) {
711 if ((fst
= getfsspec(ent
->f_mntfromname
)))
712 printf("\t%u %u\n", fst
->fs_freq
, fst
->fs_passno
);
713 else if ((fst
= getfsfile(ent
->f_mntonname
)))
714 printf("\t%u %u\n", fst
->fs_freq
, fst
->fs_passno
);
724 flags2opts(int flags
)
730 res
= catopt(res
, (flags
& MNT_RDONLY
) ? "ro" : "rw");
732 if (flags
& MNT_SYNCHRONOUS
) res
= catopt(res
, "sync");
733 if (flags
& MNT_NOEXEC
) res
= catopt(res
, "noexec");
734 if (flags
& MNT_NOSUID
) res
= catopt(res
, "nosuid");
735 if (flags
& MNT_NODEV
) res
= catopt(res
, "nodev");
736 if (flags
& MNT_UNION
) res
= catopt(res
, "union");
737 if (flags
& MNT_ASYNC
) res
= catopt(res
, "async");
738 if (flags
& MNT_NOATIME
) res
= catopt(res
, "noatime");
739 if (flags
& MNT_NOCLUSTERR
) res
= catopt(res
, "noclusterr");
740 if (flags
& MNT_NOCLUSTERW
) res
= catopt(res
, "noclusterw");
741 if (flags
& MNT_NOSYMFOLLOW
) res
= catopt(res
, "nosymfollow");
742 if (flags
& MNT_SUIDDIR
) res
= catopt(res
, "suiddir");
743 if (flags
& MNT_IGNORE
) res
= catopt(res
, "ignore");
749 xstrdup(const char *str
)
751 char* ret
= strdup(str
);
753 errx(1, "strdup failed (could not allocate memory)");