mount.c revision 154512 
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 154512 2006-01-18 11:00:34Z pjd $";
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 <ctype.h>
50#include <err.h>
51#include <errno.h>
52#include <fstab.h>
53#include <paths.h>
54#include <pwd.h>
55#include <signal.h>
56#include <stdint.h>
57#include <stdio.h>
58#include <stdlib.h>
59#include <string.h>
60#include <unistd.h>
61
62#include "extern.h"
63#include "mntopts.h"
64#include "pathnames.h"
65
66/* `meta' options */
67#define MOUNT_META_OPTION_FSTAB		"fstab"
68#define MOUNT_META_OPTION_CURRENT	"current"
69
70int debug, fstab_style, verbose;
71
72char   *catopt(char *, const char *);
73struct statfs *getmntpt(const char *);
74int	hasopt(const char *, const char *);
75int	ismounted(struct fstab *, struct statfs *, int);
76int	isremountable(const char *);
77void	mangle(char *, int *, char **);
78char   *update_options(char *, char *, int);
79int	mountfs(const char *, const char *, const char *,
80			int, const char *, const char *);
81void	remopt(char *, const char *);
82void	prmount(struct statfs *);
83void	putfsent(const struct statfs *);
84void	usage(void);
85char   *flags2opts(int);
86
87/* Map from mount options to printable formats. */
88static struct opt {
89	int o_opt;
90	const char *o_name;
91} optnames[] = {
92	{ MNT_ASYNC,		"asynchronous" },
93	{ MNT_EXPORTED,		"NFS exported" },
94	{ MNT_LOCAL,		"local" },
95	{ MNT_NOATIME,		"noatime" },
96	{ MNT_NOEXEC,		"noexec" },
97	{ MNT_NOSUID,		"nosuid" },
98	{ MNT_NOSYMFOLLOW,	"nosymfollow" },
99	{ MNT_QUOTA,		"with quotas" },
100	{ MNT_RDONLY,		"read-only" },
101	{ MNT_SYNCHRONOUS,	"synchronous" },
102	{ MNT_UNION,		"union" },
103	{ MNT_NOCLUSTERR,	"noclusterr" },
104	{ MNT_NOCLUSTERW,	"noclusterw" },
105	{ MNT_SUIDDIR,		"suiddir" },
106	{ MNT_SOFTDEP,		"soft-updates" },
107	{ MNT_MULTILABEL,	"multilabel" },
108	{ MNT_ACLS,		"acls" },
109	{ 0, NULL }
110};
111
112/*
113 * List of VFS types that can be remounted without becoming mounted on top
114 * of each other.
115 * XXX Is this list correct?
116 */
117static const char *
118remountable_fs_names[] = {
119	"ufs", "ffs", "ext2fs",
120	0
121};
122
123static int
124use_mountprog(const char *vfstype)
125{
126	/* XXX: We need to get away from implementing external mount
127	 *      programs for every filesystem, and move towards having
128	 *	each filesystem properly implement the nmount() system call.
129	 */
130	unsigned int i;
131	const char *fs[] = {
132	"cd9660", "mfs", "msdosfs", "nfs", "nfs4", "ntfs",
133	"nwfs", "nullfs", "portalfs", "smbfs", "udf", "umapfs",
134	"unionfs",
135	NULL
136	};
137
138	for (i=0; fs[i] != NULL; ++i) {
139		if (strcmp(vfstype, fs[i]) == 0)
140			return 1;
141	}
142
143	return 0;
144}
145
146static int
147exec_mountprog(const char *name, const char *execname,
148	char *const argv[])
149{
150	pid_t pid;
151	int status;
152
153	switch (pid = fork()) {
154	case -1:				/* Error. */
155		warn("fork");
156		exit (1);
157	case 0:					/* Child. */
158		/* Go find an executable. */
159		execvP(execname, _PATH_SYSPATH, argv);
160		if (errno == ENOENT) {
161			warn("exec %s not found in %s", execname,
162			    _PATH_SYSPATH);
163		}
164		exit(1);
165	default:				/* Parent. */
166		if (waitpid(pid, &status, 0) < 0) {
167			warn("waitpid");
168			return (1);
169		}
170
171		if (WIFEXITED(status)) {
172			if (WEXITSTATUS(status) != 0)
173				return (WEXITSTATUS(status));
174		} else if (WIFSIGNALED(status)) {
175			warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
176			return (1);
177		}
178		break;
179	}
180
181	return (0);
182}
183
184int
185main(int argc, char *argv[])
186{
187	const char *mntfromname, **vfslist, *vfstype;
188	struct fstab *fs;
189	struct statfs *mntbuf;
190	FILE *mountdfp;
191	pid_t pid;
192	int all, ch, i, init_flags, mntsize, rval, have_fstab;
193	char *cp, *ep, *options;
194
195	all = init_flags = 0;
196	options = NULL;
197	vfslist = NULL;
198	vfstype = "ufs";
199	while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1)
200		switch (ch) {
201		case 'a':
202			all = 1;
203			break;
204		case 'd':
205			debug = 1;
206			break;
207		case 'F':
208			setfstab(optarg);
209			break;
210		case 'f':
211			init_flags |= MNT_FORCE;
212			break;
213		case 'o':
214			if (*optarg)
215				options = catopt(options, optarg);
216			break;
217		case 'p':
218			fstab_style = 1;
219			verbose = 1;
220			break;
221		case 'r':
222			options = catopt(options, "ro");
223			break;
224		case 't':
225			if (vfslist != NULL)
226				errx(1, "only one -t option may be specified");
227			vfslist = makevfslist(optarg);
228			vfstype = optarg;
229			break;
230		case 'u':
231			init_flags |= MNT_UPDATE;
232			break;
233		case 'v':
234			verbose = 1;
235			break;
236		case 'w':
237			options = catopt(options, "noro");
238			break;
239		case '?':
240		default:
241			usage();
242			/* NOTREACHED */
243		}
244	argc -= optind;
245	argv += optind;
246
247#define	BADTYPE(type)							\
248	(strcmp(type, FSTAB_RO) &&					\
249	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
250
251	rval = 0;
252	switch (argc) {
253	case 0:
254		if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
255			err(1, "getmntinfo");
256		if (all) {
257			while ((fs = getfsent()) != NULL) {
258				if (BADTYPE(fs->fs_type))
259					continue;
260				if (checkvfsname(fs->fs_vfstype, vfslist))
261					continue;
262				if (hasopt(fs->fs_mntops, "noauto"))
263					continue;
264				if (!(init_flags & MNT_UPDATE) &&
265				    ismounted(fs, mntbuf, mntsize))
266					continue;
267				options = update_options(options, fs->fs_mntops,
268				    mntbuf->f_flags);
269				if (mountfs(fs->fs_vfstype, fs->fs_spec,
270				    fs->fs_file, init_flags, options,
271				    fs->fs_mntops))
272					rval = 1;
273			}
274		} else if (fstab_style) {
275			for (i = 0; i < mntsize; i++) {
276				if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
277					continue;
278				putfsent(&mntbuf[i]);
279			}
280		} else {
281			for (i = 0; i < mntsize; i++) {
282				if (checkvfsname(mntbuf[i].f_fstypename,
283				    vfslist))
284					continue;
285				prmount(&mntbuf[i]);
286			}
287		}
288		exit(rval);
289	case 1:
290		if (vfslist != NULL)
291			usage();
292
293		rmslashes(*argv, *argv);
294		if (init_flags & MNT_UPDATE) {
295			mntfromname = NULL;
296			have_fstab = 0;
297			if ((mntbuf = getmntpt(*argv)) == NULL)
298				errx(1, "not currently mounted %s", *argv);
299			/*
300			 * Only get the mntflags from fstab if both mntpoint
301			 * and mntspec are identical. Also handle the special
302			 * case where just '/' is mounted and 'spec' is not
303			 * identical with the one from fstab ('/dev' is missing
304			 * in the spec-string at boot-time).
305			 */
306			if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
307				if (strcmp(fs->fs_spec,
308				    mntbuf->f_mntfromname) == 0 &&
309				    strcmp(fs->fs_file,
310				    mntbuf->f_mntonname) == 0) {
311					have_fstab = 1;
312					mntfromname = mntbuf->f_mntfromname;
313				} else if (argv[0][0] == '/' &&
314				    argv[0][1] == '\0') {
315					fs = getfsfile("/");
316					have_fstab = 1;
317					mntfromname = fs->fs_spec;
318				}
319			}
320			if (have_fstab) {
321				options = update_options(options, fs->fs_mntops,
322				    mntbuf->f_flags);
323			} else {
324				mntfromname = mntbuf->f_mntfromname;
325				options = update_options(options, NULL,
326				    mntbuf->f_flags);
327			}
328			rval = mountfs(mntbuf->f_fstypename, mntfromname,
329			    mntbuf->f_mntonname, init_flags, options, 0);
330			break;
331		}
332		if ((fs = getfsfile(*argv)) == NULL &&
333		    (fs = getfsspec(*argv)) == NULL)
334			errx(1, "%s: unknown special file or file system",
335			    *argv);
336		if (BADTYPE(fs->fs_type))
337			errx(1, "%s has unknown file system type",
338			    *argv);
339		rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
340		    init_flags, options, fs->fs_mntops);
341		break;
342	case 2:
343		/*
344		 * If -t flag has not been specified, the path cannot be
345		 * found, spec contains either a ':' or a '@', then assume
346		 * that an NFS file system is being specified ala Sun.
347		 * Check if the hostname contains only allowed characters
348		 * to reduce false positives.  IPv6 addresses containing
349		 * ':' will be correctly parsed only if the separator is '@'.
350		 * The definition of a valid hostname is taken from RFC 1034.
351		 */
352		if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL ||
353		    (ep = strchr(argv[0], ':')) != NULL)) {
354			if (*ep == '@') {
355				cp = ep + 1;
356				ep = cp + strlen(cp);
357			} else
358				cp = argv[0];
359			while (cp != ep) {
360				if (!isdigit(*cp) && !isalpha(*cp) &&
361				    *cp != '.' && *cp != '-' && *cp != ':')
362					break;
363				cp++;
364			}
365			if (cp == ep)
366				vfstype = "nfs";
367		}
368		rval = mountfs(vfstype,
369		    argv[0], argv[1], init_flags, options, NULL);
370		break;
371	default:
372		usage();
373		/* NOTREACHED */
374	}
375
376	/*
377	 * If the mount was successfully, and done by root, tell mountd the
378	 * good news.  Pid checks are probably unnecessary, but don't hurt.
379	 */
380	if (rval == 0 && getuid() == 0 &&
381	    (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) {
382		if (fscanf(mountdfp, "%d", &pid) == 1 &&
383		     pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH)
384			err(1, "signal mountd");
385		(void)fclose(mountdfp);
386	}
387
388	exit(rval);
389}
390
391int
392ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
393{
394	char realfsfile[PATH_MAX];
395	int i;
396
397	if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
398		/* the root file system can always be remounted */
399		return (0);
400
401	/* The user may have specified a symlink in fstab, resolve the path */
402	if (realpath(fs->fs_file, realfsfile) == NULL) {
403		/* Cannot resolve the path, use original one */
404		strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile));
405	}
406
407	for (i = mntsize - 1; i >= 0; --i)
408		if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
409		    (!isremountable(fs->fs_vfstype) ||
410		     strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
411			return (1);
412	return (0);
413}
414
415int
416isremountable(const char *vfsname)
417{
418	const char **cp;
419
420	for (cp = remountable_fs_names; *cp; cp++)
421		if (strcmp(*cp, vfsname) == 0)
422			return (1);
423	return (0);
424}
425
426int
427hasopt(const char *mntopts, const char *option)
428{
429	int negative, found;
430	char *opt, *optbuf;
431
432	if (option[0] == 'n' && option[1] == 'o') {
433		negative = 1;
434		option += 2;
435	} else
436		negative = 0;
437	optbuf = strdup(mntopts);
438	found = 0;
439	for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
440		if (opt[0] == 'n' && opt[1] == 'o') {
441			if (!strcasecmp(opt + 2, option))
442				found = negative;
443		} else if (!strcasecmp(opt, option))
444			found = !negative;
445	}
446	free(optbuf);
447	return (found);
448}
449
450int
451mountfs(const char *vfstype, const char *spec, const char *name, int flags,
452	const char *options, const char *mntopts)
453{
454	char *argv[100];
455	struct statfs sf;
456	int argc, i, ret;
457	char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
458
459	/* resolve the mountpoint with realpath(3) */
460	(void)checkpath(name, mntpath);
461	name = mntpath;
462
463	if (mntopts == NULL)
464		mntopts = "";
465	if (options == NULL) {
466		if (*mntopts == '\0') {
467			options = "rw";
468		} else {
469			options = mntopts;
470			mntopts = "";
471		}
472	}
473	optbuf = catopt(strdup(mntopts), options);
474
475	if (strcmp(name, "/") == 0)
476		flags |= MNT_UPDATE;
477	if (flags & MNT_FORCE)
478		optbuf = catopt(optbuf, "force");
479	if (flags & MNT_RDONLY)
480		optbuf = catopt(optbuf, "ro");
481	/*
482	 * XXX
483	 * The mount_mfs (newfs) command uses -o to select the
484	 * optimization mode.  We don't pass the default "-o rw"
485	 * for that reason.
486	 */
487	if (flags & MNT_UPDATE)
488		optbuf = catopt(optbuf, "update");
489
490	/* Compatibility glue. */
491	if (strcmp(vfstype, "msdos") == 0)
492		vfstype = "msdosfs";
493
494	/* Construct the name of the appropriate mount command */
495	(void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
496
497	argc = 0;
498	argv[argc++] = execname;
499	mangle(optbuf, &argc, argv);
500	argv[argc++] = strdup(spec);
501	argv[argc++] = strdup(name);
502	argv[argc] = NULL;
503
504	if (debug) {
505		(void)printf("exec: mount_%s", vfstype);
506		for (i = 1; i < argc; i++)
507			(void)printf(" %s", argv[i]);
508		(void)printf("\n");
509		return (0);
510	}
511
512	if (use_mountprog(vfstype)) {
513		ret = exec_mountprog(name, execname, argv);
514	} else {
515		ret = mount_fs(vfstype, argc, argv);
516	}
517
518	free(optbuf);
519
520	if (verbose) {
521		if (statfs(name, &sf) < 0) {
522			warn("statfs %s", name);
523			return (1);
524		}
525		if (fstab_style)
526			putfsent(&sf);
527		else
528			prmount(&sf);
529	}
530
531	return (0);
532}
533
534void
535prmount(struct statfs *sfp)
536{
537	int flags;
538	unsigned int i;
539	struct opt *o;
540	struct passwd *pw;
541
542	(void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
543	    sfp->f_fstypename);
544
545	flags = sfp->f_flags & MNT_VISFLAGMASK;
546	for (o = optnames; flags && o->o_opt; o++)
547		if (flags & o->o_opt) {
548			(void)printf(", %s", o->o_name);
549			flags &= ~o->o_opt;
550		}
551	/*
552	 * Inform when file system is mounted by an unprivileged user
553	 * or privileged non-root user.
554	 */
555	if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) {
556		(void)printf(", mounted by ");
557		if ((pw = getpwuid(sfp->f_owner)) != NULL)
558			(void)printf("%s", pw->pw_name);
559		else
560			(void)printf("%d", sfp->f_owner);
561	}
562	if (verbose) {
563		if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
564			(void)printf(", writes: sync %ju async %ju",
565			    (uintmax_t)sfp->f_syncwrites,
566			    (uintmax_t)sfp->f_asyncwrites);
567		if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
568			(void)printf(", reads: sync %ju async %ju",
569			    (uintmax_t)sfp->f_syncreads,
570			    (uintmax_t)sfp->f_asyncreads);
571		if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) {
572			printf(", fsid ");
573			for (i = 0; i < sizeof(sfp->f_fsid); i++)
574				printf("%02x", ((u_char *)&sfp->f_fsid)[i]);
575		}
576	}
577	(void)printf(")\n");
578}
579
580struct statfs *
581getmntpt(const char *name)
582{
583	struct statfs *mntbuf;
584	int i, mntsize;
585
586	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
587	for (i = mntsize - 1; i >= 0; i--) {
588		if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
589		    strcmp(mntbuf[i].f_mntonname, name) == 0)
590			return (&mntbuf[i]);
591	}
592	return (NULL);
593}
594
595char *
596catopt(char *s0, const char *s1)
597{
598	size_t i;
599	char *cp;
600
601	if (s1 == NULL || *s1 == '\0')
602		return s0;
603
604	if (s0 && *s0) {
605		i = strlen(s0) + strlen(s1) + 1 + 1;
606		if ((cp = malloc(i)) == NULL)
607			errx(1, "malloc failed");
608		(void)snprintf(cp, i, "%s,%s", s0, s1);
609	} else
610		cp = strdup(s1);
611
612	if (s0)
613		free(s0);
614	return (cp);
615}
616
617void
618mangle(options, argcp, argv)
619	char *options;
620	int *argcp;
621	char **argv;
622{
623	char *p, *s;
624	int argc;
625
626	argc = *argcp;
627	for (s = options; (p = strsep(&s, ",")) != NULL;)
628		if (*p != '\0') {
629			if (strcmp(p, "noauto") == 0) {
630				/*
631				 * Do not pass noauto option to nmount().
632				 * or external mount program.  noauto is
633				 * only used to prevent mounting a filesystem
634				 * when 'mount -a' is specified, and is
635				 * not a real mount option.
636				 */
637				continue;
638			} else if (strcmp(p, "userquota") == 0) {
639				continue;
640			} else if (strcmp(p, "groupquota") == 0) {
641				continue;
642			} else if (*p == '-') {
643				argv[argc++] = p;
644				p = strchr(p, '=');
645				if (p != NULL) {
646					*p = '\0';
647					argv[argc++] = p+1;
648				}
649			} else {
650				argv[argc++] = strdup("-o");
651				argv[argc++] = p;
652			}
653		}
654
655	*argcp = argc;
656}
657
658
659char *
660update_options(opts, fstab, curflags)
661	char *opts;
662	char *fstab;
663	int curflags;
664{
665	char *o, *p;
666	char *cur;
667	char *expopt, *newopt, *tmpopt;
668
669	if (opts == NULL)
670		return strdup("");
671
672	/* remove meta options from list */
673	remopt(fstab, MOUNT_META_OPTION_FSTAB);
674	remopt(fstab, MOUNT_META_OPTION_CURRENT);
675	cur = flags2opts(curflags);
676
677	/*
678	 * Expand all meta-options passed to us first.
679	 */
680	expopt = NULL;
681	for (p = opts; (o = strsep(&p, ",")) != NULL;) {
682		if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
683			expopt = catopt(expopt, fstab);
684		else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
685			expopt = catopt(expopt, cur);
686		else
687			expopt = catopt(expopt, o);
688	}
689	free(cur);
690	free(opts);
691
692	/*
693	 * Remove previous contradictory arguments. Given option "foo" we
694	 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
695	 * and "foo" - so we can deal with possible options like "notice".
696	 */
697	newopt = NULL;
698	for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
699		if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
700			errx(1, "malloc failed");
701
702		strcpy(tmpopt, "no");
703		strcat(tmpopt, o);
704		remopt(newopt, tmpopt);
705		free(tmpopt);
706
707		if (strncmp("no", o, 2) == 0)
708			remopt(newopt, o+2);
709
710		newopt = catopt(newopt, o);
711	}
712	free(expopt);
713
714	return newopt;
715}
716
717void
718remopt(string, opt)
719	char *string;
720 	const char *opt;
721{
722	char *o, *p, *r;
723
724	if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
725		return;
726
727	r = string;
728
729	for (p = string; (o = strsep(&p, ",")) != NULL;) {
730		if (strcmp(opt, o) != 0) {
731			if (*r == ',' && *o != '\0')
732				r++;
733			while ((*r++ = *o++) != '\0')
734			    ;
735			*--r = ',';
736		}
737	}
738	*r = '\0';
739}
740
741void
742usage()
743{
744
745	(void)fprintf(stderr, "%s\n%s\n%s\n",
746"usage: mount [-adfpruvw] [-F fstab] [-o options] [-t ufs | external_type]",
747"       mount [-dfpruvw] special | node",
748"       mount [-dfpruvw] [-o options] [-t ufs | external_type] special node");
749	exit(1);
750}
751
752void
753putfsent(ent)
754	const struct statfs *ent;
755{
756	struct fstab *fst;
757	char *opts;
758
759	opts = flags2opts(ent->f_flags);
760	printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
761	    ent->f_fstypename, opts);
762	free(opts);
763
764	if ((fst = getfsspec(ent->f_mntfromname)))
765		printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
766	else if ((fst = getfsfile(ent->f_mntonname)))
767		printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
768	else if (strcmp(ent->f_fstypename, "ufs") == 0) {
769		if (strcmp(ent->f_mntonname, "/") == 0)
770			printf("\t1 1\n");
771		else
772			printf("\t2 2\n");
773	} else
774		printf("\t0 0\n");
775}
776
777
778char *
779flags2opts(flags)
780	int flags;
781{
782	char *res;
783
784	res = NULL;
785
786	res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw");
787
788	if (flags & MNT_SYNCHRONOUS)	res = catopt(res, "sync");
789	if (flags & MNT_NOEXEC)		res = catopt(res, "noexec");
790	if (flags & MNT_NOSUID)		res = catopt(res, "nosuid");
791	if (flags & MNT_UNION)		res = catopt(res, "union");
792	if (flags & MNT_ASYNC)		res = catopt(res, "async");
793	if (flags & MNT_NOATIME)	res = catopt(res, "noatime");
794	if (flags & MNT_NOCLUSTERR)	res = catopt(res, "noclusterr");
795	if (flags & MNT_NOCLUSTERW)	res = catopt(res, "noclusterw");
796	if (flags & MNT_NOSYMFOLLOW)	res = catopt(res, "nosymfollow");
797	if (flags & MNT_SUIDDIR)	res = catopt(res, "suiddir");
798	if (flags & MNT_MULTILABEL)	res = catopt(res, "multilabel");
799	if (flags & MNT_ACLS)		res = catopt(res, "acls");
800
801	return res;
802}
803