2 * Copyright (c) 1980, 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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15 * This product includes software developed by the University of
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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 1.3 2003/09/28 14:39:18 hmp 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 char *catopt __P((char *, const char *));
66 *getmntpt __P((const char *));
67 int hasopt __P((const char *, const char *));
68 int ismounted __P((struct fstab *, struct statfs *, int));
69 int isremountable __P((const char *));
70 void mangle __P((char *, int *, const char **));
71 char *update_options __P((char *, char *, int));
72 int mountfs __P((const char *, const char *, const char *,
73 int, const char *, const char *));
74 void remopt __P((char *, const char *));
75 void prmount __P((struct statfs *));
76 void putfsent __P((const struct statfs *));
77 void usage __P((void));
78 char *flags2opts __P((int));
80 /* Map from mount options to printable formats. */
85 { MNT_ASYNC, "asynchronous" },
86 { MNT_EXPORTED, "NFS exported" },
87 { MNT_LOCAL, "local" },
88 { MNT_NOATIME, "noatime" },
89 { MNT_NODEV, "nodev" },
90 { MNT_NOEXEC, "noexec" },
91 { MNT_NOSUID, "nosuid" },
92 { MNT_NOSYMFOLLOW, "nosymfollow" },
93 { MNT_QUOTA, "with quotas" },
94 { MNT_RDONLY, "read-only" },
95 { MNT_SYNCHRONOUS, "synchronous" },
96 { MNT_UNION, "union" },
97 { MNT_NOCLUSTERR, "noclusterr" },
98 { MNT_NOCLUSTERW, "noclusterw" },
99 { MNT_SUIDDIR, "suiddir" },
100 { MNT_SOFTDEP, "soft-updates" },
105 * List of VFS types that can be remounted without becoming mounted on top
107 * XXX Is this list correct?
110 remountable_fs_names[] = {
111 "ufs", "ffs", "ext2fs",
116 main(int argc, char **argv)
118 const char *mntfromname, **vfslist, *vfstype;
120 struct statfs *mntbuf;
123 int all, ch, i, init_flags, mntsize, rval, have_fstab;
126 all = init_flags = 0;
130 while ((ch = getopt(argc, argv, "adfo:prwt:uv")) != -1)
139 init_flags |= MNT_FORCE;
143 options = catopt(options, optarg);
150 options = catopt(options, "ro");
154 errx(1, "only one -t option may be specified");
155 vfslist = makevfslist(optarg);
159 init_flags |= MNT_UPDATE;
165 options = catopt(options, "noro");
175 #define BADTYPE(type) \
176 (strcmp(type, FSTAB_RO) && \
177 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
182 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
183 err(1, "getmntinfo");
185 while ((fs = getfsent()) != NULL) {
186 if (BADTYPE(fs->fs_type))
188 if (checkvfsname(fs->fs_vfstype, vfslist))
190 if (hasopt(fs->fs_mntops, "noauto"))
192 if (!(init_flags & MNT_UPDATE) &&
193 ismounted(fs, mntbuf, mntsize))
195 if (mountfs(fs->fs_vfstype, fs->fs_spec,
196 fs->fs_file, init_flags, options,
200 } else if (fstab_style) {
201 for (i = 0; i < mntsize; i++) {
202 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
204 putfsent(&mntbuf[i]);
207 for (i = 0; i < mntsize; i++) {
208 if (checkvfsname(mntbuf[i].f_fstypename,
219 if (init_flags & MNT_UPDATE) {
222 if ((mntbuf = getmntpt(*argv)) == NULL)
223 errx(1, "not currently mounted %s", *argv);
225 * Only get the mntflags from fstab if both mntpoint
226 * and mntspec are identical. Also handle the special
227 * case where just '/' is mounted and 'spec' is not
228 * identical with the one from fstab ('/dev' is missing
229 * in the spec-string at boot-time).
231 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
232 if (strcmp(fs->fs_spec,
233 mntbuf->f_mntfromname) == 0 &&
235 mntbuf->f_mntonname) == 0) {
237 mntfromname = mntbuf->f_mntfromname;
238 } else if (argv[0][0] == '/' &&
239 argv[0][1] == '\0') {
242 mntfromname = fs->fs_spec;
246 options = update_options(options, fs->fs_mntops,
249 mntfromname = mntbuf->f_mntfromname;
250 options = update_options(options, NULL,
253 rval = mountfs(mntbuf->f_fstypename, mntfromname,
254 mntbuf->f_mntonname, init_flags, options, 0);
257 rmslashes(*argv, *argv);
258 if ((fs = getfsfile(*argv)) == NULL &&
259 (fs = getfsspec(*argv)) == NULL)
260 errx(1, "%s: unknown special file or file system",
262 if (BADTYPE(fs->fs_type))
263 errx(1, "%s has unknown file system type",
265 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
266 init_flags, options, fs->fs_mntops);
270 * If -t flag has not been specified, the path cannot be
271 * found, spec contains either a ':' or a '@', and the
272 * spec is not a file with those characters, then assume
273 * that an NFS filesystem is being specified ala Sun.
275 if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL &&
276 access(argv[0], 0) == -1)
278 rval = mountfs(vfstype,
279 argv[0], argv[1], init_flags, options, NULL);
287 * If the mount was successfully, and done by root, tell mountd the
288 * good news. Pid checks are probably unnecessary, but don't hurt.
290 if (rval == 0 && getuid() == 0 &&
291 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) {
292 if (fscanf(mountdfp, "%d", &pid) == 1 &&
293 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH)
294 err(1, "signal mountd");
295 (void)fclose(mountdfp);
302 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
306 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
307 /* the root file system can always be remounted */
310 for (i = mntsize - 1; i >= 0; --i)
311 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 &&
312 (!isremountable(fs->fs_vfstype) ||
313 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
319 isremountable(const char *vfsname)
323 for (cp = remountable_fs_names; *cp; cp++)
324 if (strcmp(*cp, vfsname) == 0)
330 hasopt(const char *mntopts, const char *option)
335 if (option[0] == 'n' && option[1] == 'o') {
340 optbuf = strdup(mntopts);
342 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
343 if (opt[0] == 'n' && opt[1] == 'o') {
344 if (!strcasecmp(opt + 2, option))
346 } else if (!strcasecmp(opt, option))
354 mountfs(const char *vfstype, const char *spec, const char *name, int flags,
355 const char *options, const char *mntopts)
357 /* List of directories containing mount_xxx subcommands. */
358 static const char *edirs[] = {
363 const char *argv[100], **edir;
367 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN];
374 /* resolve the mountpoint with realpath(3) */
375 (void)checkpath(name, mntpath);
380 if (options == NULL) {
381 if (*mntopts == '\0') {
388 optbuf = catopt(strdup(mntopts), options);
390 if (strcmp(name, "/") == 0)
392 if (flags & MNT_FORCE)
393 optbuf = catopt(optbuf, "force");
394 if (flags & MNT_RDONLY)
395 optbuf = catopt(optbuf, "ro");
398 * The mount_mfs (newfs) command uses -o to select the
399 * optimization mode. We don't pass the default "-o rw"
402 if (flags & MNT_UPDATE)
403 optbuf = catopt(optbuf, "update");
406 argv[argc++] = vfstype;
407 mangle(optbuf, &argc, argv);
413 (void)printf("exec: mount_%s", vfstype);
414 for (i = 1; i < argc; i++)
415 (void)printf(" %s", argv[i]);
420 switch (pid = fork()) {
421 case -1: /* Error. */
426 if (strcmp(vfstype, "ufs") == 0)
427 exit(mount_ufs(argc, (char * const *) argv));
429 /* Go find an executable. */
430 for (edir = edirs; *edir; edir++) {
431 (void)snprintf(execname,
432 sizeof(execname), "%s/mount_%s", *edir, vfstype);
433 execv(execname, (char * const *)argv);
435 if (errno == ENOENT) {
438 for (edir = edirs; *edir; edir++)
439 len += strlen(*edir) + 2; /* ", " */
440 if ((cp = malloc(len)) == NULL)
441 errx(1, "malloc failed");
443 for (edir = edirs; *edir; edir++) {
448 warn("exec mount_%s not found in %s", vfstype, cp);
452 default: /* Parent. */
455 if (waitpid(pid, &status, 0) < 0) {
460 if (WIFEXITED(status)) {
461 if (WEXITSTATUS(status) != 0)
462 return (WEXITSTATUS(status));
463 } else if (WIFSIGNALED(status)) {
464 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
469 if (statfs(name, &sf) < 0) {
470 warn("statfs %s", name);
485 prmount(struct statfs *sfp)
491 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
494 flags = sfp->f_flags & MNT_VISFLAGMASK;
495 for (o = optnames; flags && o->o_opt; o++)
496 if (flags & o->o_opt) {
497 (void)printf(", %s", o->o_name);
501 (void)printf(", mounted by ");
502 if ((pw = getpwuid(sfp->f_owner)) != NULL)
503 (void)printf("%s", pw->pw_name);
505 (void)printf("%d", sfp->f_owner);
508 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
509 (void)printf(", writes: sync %ld async %ld",
510 sfp->f_syncwrites, sfp->f_asyncwrites);
511 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
512 (void)printf(", reads: sync %ld async %ld",
513 sfp->f_syncreads, sfp->f_asyncreads);
519 getmntpt(const char *name)
521 struct statfs *mntbuf;
524 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
525 for (i = mntsize - 1; i >= 0; i--) {
526 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
527 strcmp(mntbuf[i].f_mntonname, name) == 0)
534 catopt(char *s0, const char *s1)
539 if (s1 == NULL || *s1 == '\0')
543 i = strlen(s0) + strlen(s1) + 1 + 1;
544 if ((cp = malloc(i)) == NULL)
545 errx(1, "malloc failed");
546 (void)snprintf(cp, i, "%s,%s", s0, s1);
556 mangle(char *options, int *argcp, const char **argv)
562 for (s = options; (p = strsep(&s, ",")) != NULL;)
571 } else if (strcmp(p, "rw") != 0) {
582 update_options(char *opts, char *fstab, int curflags)
586 char *expopt, *newopt, *tmpopt;
591 /* remove meta options from list */
592 remopt(fstab, MOUNT_META_OPTION_FSTAB);
593 remopt(fstab, MOUNT_META_OPTION_CURRENT);
594 cur = flags2opts(curflags);
597 * Expand all meta-options passed to us first.
600 for (p = opts; (o = strsep(&p, ",")) != NULL;) {
601 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
602 expopt = catopt(expopt, fstab);
603 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
604 expopt = catopt(expopt, cur);
606 expopt = catopt(expopt, o);
612 * Remove previous contradictory arguments. Given option "foo" we
613 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
614 * and "foo" - so we can deal with possible options like "notice".
617 for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
618 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
619 errx(1, "malloc failed");
621 strcpy(tmpopt, "no");
623 remopt(newopt, tmpopt);
626 if (strncmp("no", o, 2) == 0)
629 newopt = catopt(newopt, o);
637 remopt(char *string, const char *opt)
641 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
646 for (p = string; (o = strsep(&p, ",")) != NULL;) {
647 if (strcmp(opt, o) != 0) {
648 if (*r == ',' && *o != '\0')
650 while ((*r++ = *o++) != '\0')
662 (void)fprintf(stderr, "%s\n%s\n%s\n",
663 "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node",
664 " mount [-adfpruvw] [-t ufs | external_type]",
665 " mount [-dfpruvw] special | node");
670 putfsent(const struct statfs *ent)
675 opts = flags2opts(ent->f_flags);
676 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
677 ent->f_fstypename, opts);
680 if ((fst = getfsspec(ent->f_mntfromname)))
681 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
682 else if ((fst = getfsfile(ent->f_mntonname)))
683 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
684 else if (strcmp(ent->f_fstypename, "ufs") == 0) {
685 if (strcmp(ent->f_mntonname, "/") == 0)
695 flags2opts(int flags)
701 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw");
703 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
704 if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
705 if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
706 if (flags & MNT_NODEV) res = catopt(res, "nodev");
707 if (flags & MNT_UNION) res = catopt(res, "union");
708 if (flags & MNT_ASYNC) res = catopt(res, "async");
709 if (flags & MNT_NOATIME) res = catopt(res, "noatime");
710 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
711 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
712 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
713 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");