mount.c revision 128073 
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
31static const char copyright[] =
32"@(#) Copyright (c) 1980, 1989, 1993, 1994\n\
33	The Regents of the University of California.  All rights reserved.\n";
34#endif /* not lint */
35
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)mount.c	8.25 (Berkeley) 5/8/95";
39#endif
40static const char rcsid[] =
41  "$FreeBSD: head/sbin/mount/mount.c 128073 2004-04-09 19:58:40Z markm $";
42#endif /* not lint */
43
44#include <sys/param.h>
45#include <sys/mount.h>
46#include <sys/stat.h>
47#include <sys/wait.h>
48
49#include <ufs/ufs/ufsmount.h>
50#include <ufs/ufs/dinode.h>
51#include <ufs/ffs/fs.h>
52
53#include <ctype.h>
54#include <err.h>
55#include <errno.h>
56#include <fstab.h>
57#include <paths.h>
58#include <pwd.h>
59#include <signal.h>
60#include <stdint.h>
61#include <stdio.h>
62#include <stdlib.h>
63#include <string.h>
64#include <unistd.h>
65#include <libufs.h>
66
67#include "extern.h"
68#include "mntopts.h"
69#include "pathnames.h"
70
71/* `meta' options */
72#define MOUNT_META_OPTION_FSTAB		"fstab"
73#define MOUNT_META_OPTION_CURRENT	"current"
74
75int debug, fstab_style, verbose;
76
77char   *catopt(char *, const char *);
78struct statfs *getmntpt(const char *);
79int	hasopt(const char *, const char *);
80int	ismounted(struct fstab *, struct statfs *, int);
81int	isremountable(const char *);
82void	mangle(char *, int *, const char **);
83char   *update_options(char *, char *, int);
84int	mountfs(const char *, const char *, const char *,
85			int, const char *, const char *);
86void	remopt(char *, const char *);
87void	prmount(struct statfs *);
88void	putfsent(const struct statfs *);
89void	usage(void);
90char   *flags2opts(int);
91
92/* Map from mount options to printable formats. */
93static struct opt {
94	int 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_NODEV,		"nodev" },
102	{ MNT_NOEXEC,		"noexec" },
103	{ MNT_NOSUID,		"nosuid" },
104	{ MNT_NOSYMFOLLOW,	"nosymfollow" },
105	{ MNT_QUOTA,		"with quotas" },
106	{ MNT_RDONLY,		"read-only" },
107	{ MNT_SYNCHRONOUS,	"synchronous" },
108	{ MNT_UNION,		"union" },
109	{ MNT_NOCLUSTERR,	"noclusterr" },
110	{ MNT_NOCLUSTERW,	"noclusterw" },
111	{ MNT_SUIDDIR,		"suiddir" },
112	{ MNT_SOFTDEP,		"soft-updates" },
113	{ MNT_MULTILABEL,	"multilabel" },
114	{ MNT_ACLS,		"acls" },
115	{ 0, NULL }
116};
117
118/*
119 * List of VFS types that can be remounted without becoming mounted on top
120 * of each other.
121 * XXX Is this list correct?
122 */
123static const char *
124remountable_fs_names[] = {
125	"ufs", "ffs", "ext2fs",
126	0
127};
128
129int
130main(argc, argv)
131	int argc;
132	char * const argv[];
133{
134	const char *mntfromname, **vfslist, *vfstype;
135	struct fstab *fs;
136	struct statfs *mntbuf;
137	FILE *mountdfp;
138	pid_t pid;
139	int all, ch, i, init_flags, mntsize, rval, have_fstab;
140	char *cp, *ep, *options;
141
142	all = init_flags = 0;
143	options = NULL;
144	vfslist = NULL;
145	vfstype = "ufs";
146	while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1)
147		switch (ch) {
148		case 'a':
149			all = 1;
150			break;
151		case 'd':
152			debug = 1;
153			break;
154		case 'F':
155			setfstab(optarg);
156			break;
157		case 'f':
158			init_flags |= MNT_FORCE;
159			break;
160		case 'o':
161			if (*optarg)
162				options = catopt(options, optarg);
163			break;
164		case 'p':
165			fstab_style = 1;
166			verbose = 1;
167			break;
168		case 'r':
169			options = catopt(options, "ro");
170			break;
171		case 't':
172			if (vfslist != NULL)
173				errx(1, "only one -t option may be specified");
174			vfslist = makevfslist(optarg);
175			vfstype = optarg;
176			break;
177		case 'u':
178			init_flags |= MNT_UPDATE;
179			break;
180		case 'v':
181			verbose = 1;
182			break;
183		case 'w':
184			options = catopt(options, "noro");
185			break;
186		case '?':
187		default:
188			usage();
189			/* NOTREACHED */
190		}
191	argc -= optind;
192	argv += optind;
193
194#define	BADTYPE(type)							\
195	(strcmp(type, FSTAB_RO) &&					\
196	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
197
198	rval = 0;
199	switch (argc) {
200	case 0:
201		if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
202			err(1, "getmntinfo");
203		if (all) {
204			while ((fs = getfsent()) != NULL) {
205				if (BADTYPE(fs->fs_type))
206					continue;
207				if (checkvfsname(fs->fs_vfstype, vfslist))
208					continue;
209				if (hasopt(fs->fs_mntops, "noauto"))
210					continue;
211				if (!(init_flags & MNT_UPDATE) &&
212				    ismounted(fs, mntbuf, mntsize))
213					continue;
214				options = update_options(options, fs->fs_mntops,
215				    mntbuf->f_flags);
216				if (mountfs(fs->fs_vfstype, fs->fs_spec,
217				    fs->fs_file, init_flags, options,
218				    fs->fs_mntops))
219					rval = 1;
220			}
221		} else if (fstab_style) {
222			for (i = 0; i < mntsize; i++) {
223				if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
224					continue;
225				putfsent(&mntbuf[i]);
226			}
227		} else {
228			for (i = 0; i < mntsize; i++) {
229				if (checkvfsname(mntbuf[i].f_fstypename,
230				    vfslist))
231					continue;
232				prmount(&mntbuf[i]);
233			}
234		}
235		exit(rval);
236	case 1:
237		if (vfslist != NULL)
238			usage();
239
240		rmslashes(*argv, *argv);
241		if (init_flags & MNT_UPDATE) {
242			mntfromname = NULL;
243			have_fstab = 0;
244			if ((mntbuf = getmntpt(*argv)) == NULL)
245				errx(1, "not currently mounted %s", *argv);
246			/*
247			 * Only get the mntflags from fstab if both mntpoint
248			 * and mntspec are identical. Also handle the special
249			 * case where just '/' is mounted and 'spec' is not
250			 * identical with the one from fstab ('/dev' is missing
251			 * in the spec-string at boot-time).
252			 */
253			if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
254				if (strcmp(fs->fs_spec,
255				    mntbuf->f_mntfromname) == 0 &&
256				    strcmp(fs->fs_file,
257				    mntbuf->f_mntonname) == 0) {
258					have_fstab = 1;
259					mntfromname = mntbuf->f_mntfromname;
260				} else if (argv[0][0] == '/' &&
261				    argv[0][1] == '\0') {
262					fs = getfsfile("/");
263					have_fstab = 1;
264					mntfromname = fs->fs_spec;
265				}
266			}
267			if (have_fstab) {
268				options = update_options(options, fs->fs_mntops,
269				    mntbuf->f_flags);
270			} else {
271				mntfromname = mntbuf->f_mntfromname;
272				options = update_options(options, NULL,
273				    mntbuf->f_flags);
274			}
275			rval = mountfs(mntbuf->f_fstypename, mntfromname,
276			    mntbuf->f_mntonname, init_flags, options, 0);
277			break;
278		}
279		if ((fs = getfsfile(*argv)) == NULL &&
280		    (fs = getfsspec(*argv)) == NULL)
281			errx(1, "%s: unknown special file or file system",
282			    *argv);
283		if (BADTYPE(fs->fs_type))
284			errx(1, "%s has unknown file system type",
285			    *argv);
286		rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
287		    init_flags, options, fs->fs_mntops);
288		break;
289	case 2:
290		/*
291		 * If -t flag has not been specified, the path cannot be
292		 * found, spec contains either a ':' or a '@', then assume
293		 * that an NFS file system is being specified ala Sun.
294		 * Check if the hostname contains only allowed characters
295		 * to reduce false positives.  IPv6 addresses containing
296		 * ':' will be correctly parsed only if the separator is '@'.
297		 * The definition of a valid hostname is taken from RFC 1034.
298		 */
299		if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL ||
300		    (ep = strchr(argv[0], ':')) != NULL)) {
301			if (*ep == '@') {
302				cp = ep + 1;
303				ep = cp + strlen(cp);
304			} else
305				cp = argv[0];
306			while (cp != ep) {
307				if (!isdigit(*cp) && !isalpha(*cp) &&
308				    *cp != '.' && *cp != '-' && *cp != ':')
309					break;
310				cp++;
311			}
312			if (cp == ep)
313				vfstype = "nfs";
314		}
315		rval = mountfs(vfstype,
316		    argv[0], argv[1], init_flags, options, NULL);
317		break;
318	default:
319		usage();
320		/* NOTREACHED */
321	}
322
323	/*
324	 * If the mount was successfully, and done by root, tell mountd the
325	 * good news.  Pid checks are probably unnecessary, but don't hurt.
326	 */
327	if (rval == 0 && getuid() == 0 &&
328	    (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) {
329		if (fscanf(mountdfp, "%d", &pid) == 1 &&
330		     pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH)
331			err(1, "signal mountd");
332		(void)fclose(mountdfp);
333	}
334
335	exit(rval);
336}
337
338int
339ismounted(fs, mntbuf, mntsize)
340	struct fstab *fs;
341	struct statfs *mntbuf;
342	int mntsize;
343{
344	int i;
345
346	if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
347		/* the root file system can always be remounted */
348		return (0);
349
350	for (i = mntsize - 1; i >= 0; --i)
351		if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 &&
352		    (!isremountable(fs->fs_vfstype) ||
353		     strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
354			return (1);
355	return (0);
356}
357
358int
359isremountable(vfsname)
360	const char *vfsname;
361{
362	const char **cp;
363
364	for (cp = remountable_fs_names; *cp; cp++)
365		if (strcmp(*cp, vfsname) == 0)
366			return (1);
367	return (0);
368}
369
370int
371hasopt(mntopts, option)
372	const char *mntopts, *option;
373{
374	int negative, found;
375	char *opt, *optbuf;
376
377	if (option[0] == 'n' && option[1] == 'o') {
378		negative = 1;
379		option += 2;
380	} else
381		negative = 0;
382	optbuf = strdup(mntopts);
383	found = 0;
384	for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
385		if (opt[0] == 'n' && opt[1] == 'o') {
386			if (!strcasecmp(opt + 2, option))
387				found = negative;
388		} else if (!strcasecmp(opt, option))
389			found = !negative;
390	}
391	free(optbuf);
392	return (found);
393}
394
395int
396mountfs(vfstype, spec, name, flags, options, mntopts)
397	const char *vfstype, *spec, *name, *options, *mntopts;
398	int flags;
399{
400	const char *argv[100];
401	struct statfs sf;
402	pid_t pid;
403	int argc, i, status;
404	char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
405
406#if __GNUC__
407	(void)&optbuf;
408	(void)&name;
409#endif
410
411	/* resolve the mountpoint with realpath(3) */
412	(void)checkpath(name, mntpath);
413	name = mntpath;
414
415	if (mntopts == NULL)
416		mntopts = "";
417	if (options == NULL) {
418		if (*mntopts == '\0') {
419			options = "rw";
420		} else {
421			options = mntopts;
422			mntopts = "";
423		}
424	}
425	optbuf = catopt(strdup(mntopts), options);
426
427	if (strcmp(name, "/") == 0)
428		flags |= MNT_UPDATE;
429	if (flags & MNT_FORCE)
430		optbuf = catopt(optbuf, "force");
431	if (flags & MNT_RDONLY)
432		optbuf = catopt(optbuf, "ro");
433	/*
434	 * XXX
435	 * The mount_mfs (newfs) command uses -o to select the
436	 * optimization mode.  We don't pass the default "-o rw"
437	 * for that reason.
438	 */
439	if (flags & MNT_UPDATE)
440		optbuf = catopt(optbuf, "update");
441
442	/* Compatibility glue. */
443	if (strcmp(vfstype, "msdos") == 0)
444		vfstype = "msdosfs";
445
446	argc = 0;
447	argv[argc++] = vfstype;
448	mangle(optbuf, &argc, argv);
449	argv[argc++] = spec;
450	argv[argc++] = name;
451	argv[argc] = NULL;
452
453	if (debug) {
454		(void)printf("exec: mount_%s", vfstype);
455		for (i = 1; i < argc; i++)
456			(void)printf(" %s", argv[i]);
457		(void)printf("\n");
458		return (0);
459	}
460
461	switch (pid = fork()) {
462	case -1:				/* Error. */
463		warn("fork");
464		free(optbuf);
465		return (1);
466	case 0:					/* Child. */
467		if (strcmp(vfstype, "ufs") == 0)
468			exit(mount_ufs(argc, (char * const *) argv));
469
470		/* Go find an executable. */
471		(void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
472		execvP(execname, _PATH_SYSPATH, (char * const *)argv);
473		if (errno == ENOENT) {
474			warn("exec mount_%s not found in %s", vfstype,
475			    _PATH_SYSPATH);
476		}
477		exit(1);
478		/* NOTREACHED */
479	default:				/* Parent. */
480		free(optbuf);
481
482		if (waitpid(pid, &status, 0) < 0) {
483			warn("waitpid");
484			return (1);
485		}
486
487		if (WIFEXITED(status)) {
488			if (WEXITSTATUS(status) != 0)
489				return (WEXITSTATUS(status));
490		} else if (WIFSIGNALED(status)) {
491			warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
492			return (1);
493		}
494
495		if (verbose) {
496			if (statfs(name, &sf) < 0) {
497				warn("statfs %s", name);
498				return (1);
499			}
500			if (fstab_style)
501				putfsent(&sf);
502			else
503				prmount(&sf);
504		}
505		break;
506	}
507
508	return (0);
509}
510
511void
512prmount(sfp)
513	struct statfs *sfp;
514{
515	int flags, i;
516	struct opt *o;
517	struct passwd *pw;
518	struct uufsd disk;
519
520	(void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
521	    sfp->f_fstypename);
522
523	if (strncmp(sfp->f_fstypename, "ufs", 3) == 0) {
524		ufs_disk_fillout(&disk, sfp->f_mntonname);
525		printf("%s", (disk.d_ufs == 2) ? "2" : "");
526	}
527
528	flags = sfp->f_flags & MNT_VISFLAGMASK;
529	for (o = optnames; flags && o->o_opt; o++)
530		if (flags & o->o_opt) {
531			(void)printf(", %s", o->o_name);
532			flags &= ~o->o_opt;
533		}
534	/*
535	 * Inform when file system is mounted by an unprivileged user
536	 * or privileged non-root user.
537	 */
538	if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) {
539		(void)printf(", mounted by ");
540		if ((pw = getpwuid(sfp->f_owner)) != NULL)
541			(void)printf("%s", pw->pw_name);
542		else
543			(void)printf("%d", sfp->f_owner);
544	}
545	if (verbose) {
546		if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
547			(void)printf(", writes: sync %ju async %ju",
548			    (uintmax_t)sfp->f_syncwrites,
549			    (uintmax_t)sfp->f_asyncwrites);
550		if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
551			(void)printf(", reads: sync %ju async %ju",
552			    (uintmax_t)sfp->f_syncreads,
553			    (uintmax_t)sfp->f_asyncreads);
554		if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) {
555			printf(", fsid ");
556			for (i = 0; i < sizeof(sfp->f_fsid); i++)
557				printf("%02x", ((u_char *)&sfp->f_fsid)[i]);
558		}
559	}
560	(void)printf(")\n");
561}
562
563struct statfs *
564getmntpt(name)
565	const char *name;
566{
567	struct statfs *mntbuf;
568	int i, mntsize;
569
570	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
571	for (i = mntsize - 1; i >= 0; i--) {
572		if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
573		    strcmp(mntbuf[i].f_mntonname, name) == 0)
574			return (&mntbuf[i]);
575	}
576	return (NULL);
577}
578
579char *
580catopt(s0, s1)
581	char *s0;
582	const char *s1;
583{
584	size_t i;
585	char *cp;
586
587	if (s1 == NULL || *s1 == '\0')
588		return s0;
589
590	if (s0 && *s0) {
591		i = strlen(s0) + strlen(s1) + 1 + 1;
592		if ((cp = malloc(i)) == NULL)
593			errx(1, "malloc failed");
594		(void)snprintf(cp, i, "%s,%s", s0, s1);
595	} else
596		cp = strdup(s1);
597
598	if (s0)
599		free(s0);
600	return (cp);
601}
602
603void
604mangle(options, argcp, argv)
605	char *options;
606	int *argcp;
607	const char **argv;
608{
609	char *p, *s;
610	int argc;
611
612	argc = *argcp;
613	for (s = options; (p = strsep(&s, ",")) != NULL;)
614		if (*p != '\0') {
615			if (*p == '-') {
616				argv[argc++] = p;
617				p = strchr(p, '=');
618				if (p != NULL) {
619					*p = '\0';
620					argv[argc++] = p+1;
621				}
622			} else if (strcmp(p, "rw") != 0) {
623				argv[argc++] = "-o";
624				argv[argc++] = p;
625			}
626		}
627
628	*argcp = argc;
629}
630
631
632char *
633update_options(opts, fstab, curflags)
634	char *opts;
635	char *fstab;
636	int curflags;
637{
638	char *o, *p;
639	char *cur;
640	char *expopt, *newopt, *tmpopt;
641
642	if (opts == NULL)
643		return strdup("");
644
645	/* remove meta options from list */
646	remopt(fstab, MOUNT_META_OPTION_FSTAB);
647	remopt(fstab, MOUNT_META_OPTION_CURRENT);
648	cur = flags2opts(curflags);
649
650	/*
651	 * Expand all meta-options passed to us first.
652	 */
653	expopt = NULL;
654	for (p = opts; (o = strsep(&p, ",")) != NULL;) {
655		if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
656			expopt = catopt(expopt, fstab);
657		else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
658			expopt = catopt(expopt, cur);
659		else
660			expopt = catopt(expopt, o);
661	}
662	free(cur);
663	free(opts);
664
665	/*
666	 * Remove previous contradictory arguments. Given option "foo" we
667	 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
668	 * and "foo" - so we can deal with possible options like "notice".
669	 */
670	newopt = NULL;
671	for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
672		if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
673			errx(1, "malloc failed");
674
675		strcpy(tmpopt, "no");
676		strcat(tmpopt, o);
677		remopt(newopt, tmpopt);
678		free(tmpopt);
679
680		if (strncmp("no", o, 2) == 0)
681			remopt(newopt, o+2);
682
683		newopt = catopt(newopt, o);
684	}
685	free(expopt);
686
687	return newopt;
688}
689
690void
691remopt(string, opt)
692	char *string;
693 	const char *opt;
694{
695	char *o, *p, *r;
696
697	if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
698		return;
699
700	r = string;
701
702	for (p = string; (o = strsep(&p, ",")) != NULL;) {
703		if (strcmp(opt, o) != 0) {
704			if (*r == ',' && *o != '\0')
705				r++;
706			while ((*r++ = *o++) != '\0')
707			    ;
708			*--r = ',';
709		}
710	}
711	*r = '\0';
712}
713
714void
715usage()
716{
717
718	(void)fprintf(stderr, "%s\n%s\n%s\n",
719"usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node",
720"       mount [-adfpruvw] [ -F fstab] [-o options] [-t ufs | external_type]",
721"       mount [-dfpruvw] special | node");
722	exit(1);
723}
724
725void
726putfsent(ent)
727	const struct statfs *ent;
728{
729	struct fstab *fst;
730	char *opts;
731
732	opts = flags2opts(ent->f_flags);
733	printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
734	    ent->f_fstypename, opts);
735	free(opts);
736
737	if ((fst = getfsspec(ent->f_mntfromname)))
738		printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
739	else if ((fst = getfsfile(ent->f_mntonname)))
740		printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
741	else if (strcmp(ent->f_fstypename, "ufs") == 0) {
742		if (strcmp(ent->f_mntonname, "/") == 0)
743			printf("\t1 1\n");
744		else
745			printf("\t2 2\n");
746	} else
747		printf("\t0 0\n");
748}
749
750
751char *
752flags2opts(flags)
753	int flags;
754{
755	char *res;
756
757	res = NULL;
758
759	res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw");
760
761	if (flags & MNT_SYNCHRONOUS)	res = catopt(res, "sync");
762	if (flags & MNT_NOEXEC)		res = catopt(res, "noexec");
763	if (flags & MNT_NOSUID)		res = catopt(res, "nosuid");
764	if (flags & MNT_NODEV)		res = catopt(res, "nodev");
765	if (flags & MNT_UNION)		res = catopt(res, "union");
766	if (flags & MNT_ASYNC)		res = catopt(res, "async");
767	if (flags & MNT_NOATIME)	res = catopt(res, "noatime");
768	if (flags & MNT_NOCLUSTERR)	res = catopt(res, "noclusterr");
769	if (flags & MNT_NOCLUSTERW)	res = catopt(res, "noclusterw");
770	if (flags & MNT_NOSYMFOLLOW)	res = catopt(res, "nosymfollow");
771	if (flags & MNT_SUIDDIR)	res = catopt(res, "suiddir");
772	if (flags & MNT_MULTILABEL)	res = catopt(res, "multilabel");
773	if (flags & MNT_ACLS)		res = catopt(res, "acls");
774
775	return res;
776}
777