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 * 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.
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
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";
35 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95";
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/param.h>
43 #include <sys/mount.h>
63 #include "pathnames.h"
66 #define MOUNT_META_OPTION_FSTAB "fstab"
67 #define MOUNT_META_OPTION_CURRENT "current"
69 int debug, fstab_style, verbose;
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 *);
90 char *flags2opts(int);
92 /* Map from mount options to printable formats. */
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_MULTILABEL, "multilabel" },
113 { MNT_ACLS, "acls" },
114 { MNT_GJOURNAL, "gjournal" },
119 * List of VFS types that can be remounted without becoming mounted on top
121 * XXX Is this list correct?
124 remountable_fs_names[] = {
125 "ufs", "ffs", "ext2fs",
129 static const char userquotaeq[] = "userquota=";
130 static const char groupquotaeq[] = "groupquota=";
132 static char *mountprog = NULL;
135 use_mountprog(const char *vfstype)
137 /* XXX: We need to get away from implementing external mount
138 * programs for every filesystem, and move towards having
139 * each filesystem properly implement the nmount() system call.
143 "cd9660", "mfs", "msdosfs", "nfs", "nfs4", "ntfs",
144 "nwfs", "nullfs", "portalfs", "smbfs", "udf", "unionfs",
148 if (mountprog != NULL)
151 for (i = 0; fs[i] != NULL; ++i) {
152 if (strcmp(vfstype, fs[i]) == 0)
160 exec_mountprog(const char *name, const char *execname, char *const argv[])
165 switch (pid = fork()) {
166 case -1: /* Error. */
170 /* Go find an executable. */
171 execvP(execname, _PATH_SYSPATH, argv);
172 if (errno == ENOENT) {
173 warn("exec %s not found", execname);
174 if (execname[0] != '/') {
175 warnx("in path: %s", _PATH_SYSPATH);
179 default: /* Parent. */
180 if (waitpid(pid, &status, 0) < 0) {
185 if (WIFEXITED(status)) {
186 if (WEXITSTATUS(status) != 0)
187 return (WEXITSTATUS(status));
188 } else if (WIFSIGNALED(status)) {
189 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
199 specified_ro(const char *arg)
204 optbuf = strdup(arg);
208 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
209 if (strcmp(opt, "ro") == 0) {
224 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid);
226 /* Mountd is not running. */
230 if (errno != EEXIST) {
231 /* Cannot open pidfile for some reason. */
234 /* We have mountd(8) PID in mountdpid varible, let's signal it. */
235 if (kill(mountdpid, SIGHUP) == -1)
236 err(1, "signal mountd");
240 main(int argc, char *argv[])
242 const char *mntfromname, **vfslist, *vfstype;
244 struct statfs *mntbuf;
245 int all, ch, i, init_flags, late, mntsize, rval, have_fstab, ro;
246 char *cp, *ep, *options;
248 all = init_flags = late = 0;
253 while ((ch = getopt(argc, argv, "adF:flo:prt:uvw")) != -1)
265 init_flags |= MNT_FORCE;
272 options = catopt(options, optarg);
273 if (specified_ro(optarg))
282 options = catopt(options, "ro");
287 errx(1, "only one -t option may be specified");
288 vfslist = makevfslist(optarg);
292 init_flags |= MNT_UPDATE;
298 options = catopt(options, "noro");
308 #define BADTYPE(type) \
309 (strcmp(type, FSTAB_RO) && \
310 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
312 if ((init_flags & MNT_UPDATE) && (ro == 0))
313 options = catopt(options, "noro");
318 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
319 err(1, "getmntinfo");
321 while ((fs = getfsent()) != NULL) {
322 if (BADTYPE(fs->fs_type))
324 if (checkvfsname(fs->fs_vfstype, vfslist))
326 if (hasopt(fs->fs_mntops, "noauto"))
328 if (hasopt(fs->fs_mntops, "late") && !late)
330 if (!(init_flags & MNT_UPDATE) &&
331 ismounted(fs, mntbuf, mntsize))
333 options = update_options(options, fs->fs_mntops,
335 if (mountfs(fs->fs_vfstype, fs->fs_spec,
336 fs->fs_file, init_flags, options,
340 } else if (fstab_style) {
341 for (i = 0; i < mntsize; i++) {
342 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
344 putfsent(&mntbuf[i]);
347 for (i = 0; i < mntsize; i++) {
348 if (checkvfsname(mntbuf[i].f_fstypename,
359 rmslashes(*argv, *argv);
360 if (init_flags & MNT_UPDATE) {
363 if ((mntbuf = getmntpt(*argv)) == NULL)
364 errx(1, "not currently mounted %s", *argv);
366 * Only get the mntflags from fstab if both mntpoint
367 * and mntspec are identical. Also handle the special
368 * case where just '/' is mounted and 'spec' is not
369 * identical with the one from fstab ('/dev' is missing
370 * in the spec-string at boot-time).
372 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
373 if (strcmp(fs->fs_spec,
374 mntbuf->f_mntfromname) == 0 &&
376 mntbuf->f_mntonname) == 0) {
378 mntfromname = mntbuf->f_mntfromname;
379 } else if (argv[0][0] == '/' &&
380 argv[0][1] == '\0') {
383 mntfromname = fs->fs_spec;
387 options = update_options(options, fs->fs_mntops,
390 mntfromname = mntbuf->f_mntfromname;
391 options = update_options(options, NULL,
394 rval = mountfs(mntbuf->f_fstypename, mntfromname,
395 mntbuf->f_mntonname, init_flags, options, 0);
398 if ((fs = getfsfile(*argv)) == NULL &&
399 (fs = getfsspec(*argv)) == NULL)
400 errx(1, "%s: unknown special file or file system",
402 if (BADTYPE(fs->fs_type))
403 errx(1, "%s has unknown file system type",
405 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
406 init_flags, options, fs->fs_mntops);
410 * If -t flag has not been specified, the path cannot be
411 * found, spec contains either a ':' or a '@', then assume
412 * that an NFS file system is being specified ala Sun.
413 * Check if the hostname contains only allowed characters
414 * to reduce false positives. IPv6 addresses containing
415 * ':' will be correctly parsed only if the separator is '@'.
416 * The definition of a valid hostname is taken from RFC 1034.
418 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL ||
419 (ep = strchr(argv[0], ':')) != NULL)) {
422 ep = cp + strlen(cp);
426 if (!isdigit(*cp) && !isalpha(*cp) &&
427 *cp != '.' && *cp != '-' && *cp != ':')
434 rval = mountfs(vfstype,
435 argv[0], argv[1], init_flags, options, NULL);
443 * If the mount was successfully, and done by root, tell mountd the
446 if (rval == 0 && getuid() == 0)
453 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
455 char realfsfile[PATH_MAX];
458 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
459 /* the root file system can always be remounted */
462 /* The user may have specified a symlink in fstab, resolve the path */
463 if (realpath(fs->fs_file, realfsfile) == NULL) {
464 /* Cannot resolve the path, use original one */
465 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile));
468 for (i = mntsize - 1; i >= 0; --i)
469 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
470 (!isremountable(fs->fs_vfstype) ||
471 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
477 isremountable(const char *vfsname)
481 for (cp = remountable_fs_names; *cp; cp++)
482 if (strcmp(*cp, vfsname) == 0)
488 hasopt(const char *mntopts, const char *option)
493 if (option[0] == 'n' && option[1] == 'o') {
498 optbuf = strdup(mntopts);
500 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
501 if (opt[0] == 'n' && opt[1] == 'o') {
502 if (!strcasecmp(opt + 2, option))
504 } else if (!strcasecmp(opt, option))
512 append_arg(struct cpa *sa, char *arg)
514 if (sa->c + 1 == sa->sz) {
515 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2;
516 sa->a = realloc(sa->a, sizeof(sa->a) * sa->sz);
518 errx(1, "realloc failed");
520 sa->a[++sa->c] = arg;
524 mountfs(const char *vfstype, const char *spec, const char *name, int flags,
525 const char *options, const char *mntopts)
529 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
530 static struct cpa mnt_argv;
532 /* resolve the mountpoint with realpath(3) */
533 (void)checkpath(name, mntpath);
538 optbuf = catopt(strdup(mntopts), options);
540 if (strcmp(name, "/") == 0)
542 if (flags & MNT_FORCE)
543 optbuf = catopt(optbuf, "force");
544 if (flags & MNT_RDONLY)
545 optbuf = catopt(optbuf, "ro");
548 * The mount_mfs (newfs) command uses -o to select the
549 * optimization mode. We don't pass the default "-o rw"
552 if (flags & MNT_UPDATE)
553 optbuf = catopt(optbuf, "update");
555 /* Compatibility glue. */
556 if (strcmp(vfstype, "msdos") == 0) {
558 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated.");
562 /* Construct the name of the appropriate mount command */
563 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
566 append_arg(&mnt_argv, execname);
567 mangle(optbuf, &mnt_argv);
568 if (mountprog != NULL)
569 strcpy(execname, mountprog);
571 append_arg(&mnt_argv, strdup(spec));
572 append_arg(&mnt_argv, strdup(name));
573 append_arg(&mnt_argv, NULL);
576 if (use_mountprog(vfstype))
577 printf("exec: %s", execname);
579 printf("mount -t %s", vfstype);
580 for (i = 1; i < mnt_argv.c; i++)
581 (void)printf(" %s", mnt_argv.a[i]);
586 if (use_mountprog(vfstype)) {
587 ret = exec_mountprog(name, execname, mnt_argv.a);
589 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a);
595 if (statfs(name, &sf) < 0) {
596 warn("statfs %s", name);
609 prmount(struct statfs *sfp)
616 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
619 flags = sfp->f_flags & MNT_VISFLAGMASK;
620 for (o = optnames; flags && o->o_opt; o++)
621 if (flags & o->o_opt) {
622 (void)printf(", %s", o->o_name);
626 * Inform when file system is mounted by an unprivileged user
627 * or privileged non-root user.
629 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) {
630 (void)printf(", mounted by ");
631 if ((pw = getpwuid(sfp->f_owner)) != NULL)
632 (void)printf("%s", pw->pw_name);
634 (void)printf("%d", sfp->f_owner);
637 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
638 (void)printf(", writes: sync %ju async %ju",
639 (uintmax_t)sfp->f_syncwrites,
640 (uintmax_t)sfp->f_asyncwrites);
641 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
642 (void)printf(", reads: sync %ju async %ju",
643 (uintmax_t)sfp->f_syncreads,
644 (uintmax_t)sfp->f_asyncreads);
645 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) {
647 for (i = 0; i < sizeof(sfp->f_fsid); i++)
648 printf("%02x", ((u_char *)&sfp->f_fsid)[i]);
655 getmntpt(const char *name)
657 struct statfs *mntbuf;
660 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
661 for (i = mntsize - 1; i >= 0; i--) {
662 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
663 strcmp(mntbuf[i].f_mntonname, name) == 0)
670 catopt(char *s0, const char *s1)
675 if (s1 == NULL || *s1 == '\0')
679 i = strlen(s0) + strlen(s1) + 1 + 1;
680 if ((cp = malloc(i)) == NULL)
681 errx(1, "malloc failed");
682 (void)snprintf(cp, i, "%s,%s", s0, s1);
692 mangle(char *options, struct cpa *a)
696 for (s = options; (p = strsep(&s, ",")) != NULL;)
698 if (strcmp(p, "noauto") == 0) {
700 * Do not pass noauto option to nmount().
701 * or external mount program. noauto is
702 * only used to prevent mounting a filesystem
703 * when 'mount -a' is specified, and is
704 * not a real mount option.
707 } else if (strcmp(p, "late") == 0) {
709 * "late" is used to prevent certain file
710 * systems from being mounted before late
711 * in the boot cycle; for instance,
712 * loopback NFS mounts can't be mounted
713 * before mountd starts.
716 } else if (strncmp(p, "mountprog", 9) == 0) {
718 * "mountprog" is used to force the use of
719 * userland mount programs.
721 val = strchr(p, '=');
725 mountprog = strdup(val);
728 if (mountprog == NULL) {
729 errx(1, "Need value for -o mountprog");
732 } else if (strcmp(p, "userquota") == 0) {
734 } else if (strncmp(p, userquotaeq,
735 sizeof(userquotaeq) - 1) == 0) {
737 } else if (strcmp(p, "groupquota") == 0) {
739 } else if (strncmp(p, groupquotaeq,
740 sizeof(groupquotaeq) - 1) == 0) {
742 } else if (*p == '-') {
747 append_arg(a, p + 1);
750 append_arg(a, strdup("-o"));
758 update_options(char *opts, char *fstab, int curflags)
762 char *expopt, *newopt, *tmpopt;
767 /* remove meta options from list */
768 remopt(fstab, MOUNT_META_OPTION_FSTAB);
769 remopt(fstab, MOUNT_META_OPTION_CURRENT);
770 cur = flags2opts(curflags);
773 * Expand all meta-options passed to us first.
776 for (p = opts; (o = strsep(&p, ",")) != NULL;) {
777 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
778 expopt = catopt(expopt, fstab);
779 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
780 expopt = catopt(expopt, cur);
782 expopt = catopt(expopt, o);
788 * Remove previous contradictory arguments. Given option "foo" we
789 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
790 * and "foo" - so we can deal with possible options like "notice".
793 for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
794 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
795 errx(1, "malloc failed");
797 strcpy(tmpopt, "no");
799 remopt(newopt, tmpopt);
802 if (strncmp("no", o, 2) == 0)
805 newopt = catopt(newopt, o);
813 remopt(char *string, const char *opt)
817 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
822 for (p = string; (o = strsep(&p, ",")) != NULL;) {
823 if (strcmp(opt, o) != 0) {
824 if (*r == ',' && *o != '\0')
826 while ((*r++ = *o++) != '\0')
838 (void)fprintf(stderr, "%s\n%s\n%s\n",
839 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]",
840 " mount [-dfpruvw] special | node",
841 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node");
846 putfsent(struct statfs *ent)
852 opts = flags2opts(ent->f_flags);
854 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 ||
855 strncmp(ent->f_mntfromname, "<above>", 7) == 0) {
856 strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8)
861 * "rw" is not a real mount option; this is why we print NULL as "rw"
862 * if opts is still NULL here.
864 l = strlen(ent->f_mntfromname);
865 printf("%s%s%s%s", ent->f_mntfromname,
868 l < 24 ? "\t" : " ");
869 l = strlen(ent->f_mntonname);
870 printf("%s%s%s%s", ent->f_mntonname,
873 l < 24 ? "\t" : " ");
874 printf("%s\t", ent->f_fstypename);
876 printf("%s\t", "rw");
884 if ((fst = getfsspec(ent->f_mntfromname)))
885 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
886 else if ((fst = getfsfile(ent->f_mntonname)))
887 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
888 else if (strcmp(ent->f_fstypename, "ufs") == 0) {
889 if (strcmp(ent->f_mntonname, "/") == 0)
899 flags2opts(int flags)
905 if (flags & MNT_RDONLY) res = catopt(res, "ro");
906 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
907 if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
908 if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
909 if (flags & MNT_UNION) res = catopt(res, "union");
910 if (flags & MNT_ASYNC) res = catopt(res, "async");
911 if (flags & MNT_NOATIME) res = catopt(res, "noatime");
912 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
913 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
914 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
915 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
916 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel");
917 if (flags & MNT_ACLS) res = catopt(res, "acls");