mount.c revision 155997 
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 155997 2006-02-25 05:09:47Z rodrigc $";
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, ro;
193	char *cp, *ep, *options;
194
195	all = init_flags = 0;
196	ro = 0;
197	options = NULL;
198	vfslist = NULL;
199	vfstype = "ufs";
200	while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1)
201		switch (ch) {
202		case 'a':
203			all = 1;
204			break;
205		case 'd':
206			debug = 1;
207			break;
208		case 'F':
209			setfstab(optarg);
210			break;
211		case 'f':
212			init_flags |= MNT_FORCE;
213			break;
214		case 'o':
215			if (*optarg)
216				options = catopt(options, optarg);
217			break;
218		case 'p':
219			fstab_style = 1;
220			verbose = 1;
221			break;
222		case 'r':
223			options = catopt(options, "ro");
224			ro = 1;
225			break;
226		case 't':
227			if (vfslist != NULL)
228				errx(1, "only one -t option may be specified");
229			vfslist = makevfslist(optarg);
230			vfstype = optarg;
231			break;
232		case 'u':
233			init_flags |= MNT_UPDATE;
234			break;
235		case 'v':
236			verbose = 1;
237			break;
238		case 'w':
239			options = catopt(options, "noro");
240			break;
241		case '?':
242		default:
243			usage();
244			/* NOTREACHED */
245		}
246	argc -= optind;
247	argv += optind;
248
249#define	BADTYPE(type)							\
250	(strcmp(type, FSTAB_RO) &&					\
251	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
252
253	if ((init_flags & MNT_UPDATE) && (ro == 0))
254		options = catopt(options, "noro");
255
256	rval = 0;
257	switch (argc) {
258	case 0:
259		if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
260			err(1, "getmntinfo");
261		if (all) {
262			while ((fs = getfsent()) != NULL) {
263				if (BADTYPE(fs->fs_type))
264					continue;
265				if (checkvfsname(fs->fs_vfstype, vfslist))
266					continue;
267				if (hasopt(fs->fs_mntops, "noauto"))
268					continue;
269				if (!(init_flags & MNT_UPDATE) &&
270				    ismounted(fs, mntbuf, mntsize))
271					continue;
272				options = update_options(options, fs->fs_mntops,
273				    mntbuf->f_flags);
274				if (mountfs(fs->fs_vfstype, fs->fs_spec,
275				    fs->fs_file, init_flags, options,
276				    fs->fs_mntops))
277					rval = 1;
278			}
279		} else if (fstab_style) {
280			for (i = 0; i < mntsize; i++) {
281				if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
282					continue;
283				putfsent(&mntbuf[i]);
284			}
285		} else {
286			for (i = 0; i < mntsize; i++) {
287				if (checkvfsname(mntbuf[i].f_fstypename,
288				    vfslist))
289					continue;
290				prmount(&mntbuf[i]);
291			}
292		}
293		exit(rval);
294	case 1:
295		if (vfslist != NULL)
296			usage();
297
298		rmslashes(*argv, *argv);
299		if (init_flags & MNT_UPDATE) {
300			mntfromname = NULL;
301			have_fstab = 0;
302			if ((mntbuf = getmntpt(*argv)) == NULL)
303				errx(1, "not currently mounted %s", *argv);
304			/*
305			 * Only get the mntflags from fstab if both mntpoint
306			 * and mntspec are identical. Also handle the special
307			 * case where just '/' is mounted and 'spec' is not
308			 * identical with the one from fstab ('/dev' is missing
309			 * in the spec-string at boot-time).
310			 */
311			if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
312				if (strcmp(fs->fs_spec,
313				    mntbuf->f_mntfromname) == 0 &&
314				    strcmp(fs->fs_file,
315				    mntbuf->f_mntonname) == 0) {
316					have_fstab = 1;
317					mntfromname = mntbuf->f_mntfromname;
318				} else if (argv[0][0] == '/' &&
319				    argv[0][1] == '\0') {
320					fs = getfsfile("/");
321					have_fstab = 1;
322					mntfromname = fs->fs_spec;
323				}
324			}
325			if (have_fstab) {
326				options = update_options(options, fs->fs_mntops,
327				    mntbuf->f_flags);
328			} else {
329				mntfromname = mntbuf->f_mntfromname;
330				options = update_options(options, NULL,
331				    mntbuf->f_flags);
332			}
333			rval = mountfs(mntbuf->f_fstypename, mntfromname,
334			    mntbuf->f_mntonname, init_flags, options, 0);
335			break;
336		}
337		if ((fs = getfsfile(*argv)) == NULL &&
338		    (fs = getfsspec(*argv)) == NULL)
339			errx(1, "%s: unknown special file or file system",
340			    *argv);
341		if (BADTYPE(fs->fs_type))
342			errx(1, "%s has unknown file system type",
343			    *argv);
344		rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
345		    init_flags, options, fs->fs_mntops);
346		break;
347	case 2:
348		/*
349		 * If -t flag has not been specified, the path cannot be
350		 * found, spec contains either a ':' or a '@', then assume
351		 * that an NFS file system is being specified ala Sun.
352		 * Check if the hostname contains only allowed characters
353		 * to reduce false positives.  IPv6 addresses containing
354		 * ':' will be correctly parsed only if the separator is '@'.
355		 * The definition of a valid hostname is taken from RFC 1034.
356		 */
357		if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL ||
358		    (ep = strchr(argv[0], ':')) != NULL)) {
359			if (*ep == '@') {
360				cp = ep + 1;
361				ep = cp + strlen(cp);
362			} else
363				cp = argv[0];
364			while (cp != ep) {
365				if (!isdigit(*cp) && !isalpha(*cp) &&
366				    *cp != '.' && *cp != '-' && *cp != ':')
367					break;
368				cp++;
369			}
370			if (cp == ep)
371				vfstype = "nfs";
372		}
373		rval = mountfs(vfstype,
374		    argv[0], argv[1], init_flags, options, NULL);
375		break;
376	default:
377		usage();
378		/* NOTREACHED */
379	}
380
381	/*
382	 * If the mount was successfully, and done by root, tell mountd the
383	 * good news.  Pid checks are probably unnecessary, but don't hurt.
384	 */
385	if (rval == 0 && getuid() == 0 &&
386	    (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) {
387		if (fscanf(mountdfp, "%d", &pid) == 1 &&
388		     pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH)
389			err(1, "signal mountd");
390		(void)fclose(mountdfp);
391	}
392
393	exit(rval);
394}
395
396int
397ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
398{
399	char realfsfile[PATH_MAX];
400	int i;
401
402	if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
403		/* the root file system can always be remounted */
404		return (0);
405
406	/* The user may have specified a symlink in fstab, resolve the path */
407	if (realpath(fs->fs_file, realfsfile) == NULL) {
408		/* Cannot resolve the path, use original one */
409		strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile));
410	}
411
412	for (i = mntsize - 1; i >= 0; --i)
413		if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
414		    (!isremountable(fs->fs_vfstype) ||
415		     strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
416			return (1);
417	return (0);
418}
419
420int
421isremountable(const char *vfsname)
422{
423	const char **cp;
424
425	for (cp = remountable_fs_names; *cp; cp++)
426		if (strcmp(*cp, vfsname) == 0)
427			return (1);
428	return (0);
429}
430
431int
432hasopt(const char *mntopts, const char *option)
433{
434	int negative, found;
435	char *opt, *optbuf;
436
437	if (option[0] == 'n' && option[1] == 'o') {
438		negative = 1;
439		option += 2;
440	} else
441		negative = 0;
442	optbuf = strdup(mntopts);
443	found = 0;
444	for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
445		if (opt[0] == 'n' && opt[1] == 'o') {
446			if (!strcasecmp(opt + 2, option))
447				found = negative;
448		} else if (!strcasecmp(opt, option))
449			found = !negative;
450	}
451	free(optbuf);
452	return (found);
453}
454
455int
456mountfs(const char *vfstype, const char *spec, const char *name, int flags,
457	const char *options, const char *mntopts)
458{
459	char *argv[100];
460	struct statfs sf;
461	int argc, i, ret;
462	char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
463
464	/* resolve the mountpoint with realpath(3) */
465	(void)checkpath(name, mntpath);
466	name = mntpath;
467
468	if (mntopts == NULL)
469		mntopts = "";
470	optbuf = catopt(strdup(mntopts), options);
471
472	if (strcmp(name, "/") == 0)
473		flags |= MNT_UPDATE;
474	if (flags & MNT_FORCE)
475		optbuf = catopt(optbuf, "force");
476	if (flags & MNT_RDONLY)
477		optbuf = catopt(optbuf, "ro");
478	/*
479	 * XXX
480	 * The mount_mfs (newfs) command uses -o to select the
481	 * optimization mode.  We don't pass the default "-o rw"
482	 * for that reason.
483	 */
484	if (flags & MNT_UPDATE)
485		optbuf = catopt(optbuf, "update");
486
487	/* Compatibility glue. */
488	if (strcmp(vfstype, "msdos") == 0)
489		vfstype = "msdosfs";
490
491	/* Construct the name of the appropriate mount command */
492	(void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
493
494	argc = 0;
495	argv[argc++] = execname;
496	mangle(optbuf, &argc, argv);
497	argv[argc++] = strdup(spec);
498	argv[argc++] = strdup(name);
499	argv[argc] = NULL;
500
501	if (debug) {
502		(void)printf("exec: mount_%s", vfstype);
503		for (i = 1; i < argc; i++)
504			(void)printf(" %s", argv[i]);
505		(void)printf("\n");
506		return (0);
507	}
508
509	if (use_mountprog(vfstype)) {
510		ret = exec_mountprog(name, execname, argv);
511	} else {
512		ret = mount_fs(vfstype, argc, argv);
513	}
514
515	free(optbuf);
516
517	if (verbose) {
518		if (statfs(name, &sf) < 0) {
519			warn("statfs %s", name);
520			return (1);
521		}
522		if (fstab_style)
523			putfsent(&sf);
524		else
525			prmount(&sf);
526	}
527
528	return (0);
529}
530
531void
532prmount(struct statfs *sfp)
533{
534	int flags;
535	unsigned int i;
536	struct opt *o;
537	struct passwd *pw;
538
539	(void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
540	    sfp->f_fstypename);
541
542	flags = sfp->f_flags & MNT_VISFLAGMASK;
543	for (o = optnames; flags && o->o_opt; o++)
544		if (flags & o->o_opt) {
545			(void)printf(", %s", o->o_name);
546			flags &= ~o->o_opt;
547		}
548	/*
549	 * Inform when file system is mounted by an unprivileged user
550	 * or privileged non-root user.
551	 */
552	if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) {
553		(void)printf(", mounted by ");
554		if ((pw = getpwuid(sfp->f_owner)) != NULL)
555			(void)printf("%s", pw->pw_name);
556		else
557			(void)printf("%d", sfp->f_owner);
558	}
559	if (verbose) {
560		if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
561			(void)printf(", writes: sync %ju async %ju",
562			    (uintmax_t)sfp->f_syncwrites,
563			    (uintmax_t)sfp->f_asyncwrites);
564		if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
565			(void)printf(", reads: sync %ju async %ju",
566			    (uintmax_t)sfp->f_syncreads,
567			    (uintmax_t)sfp->f_asyncreads);
568		if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) {
569			printf(", fsid ");
570			for (i = 0; i < sizeof(sfp->f_fsid); i++)
571				printf("%02x", ((u_char *)&sfp->f_fsid)[i]);
572		}
573	}
574	(void)printf(")\n");
575}
576
577struct statfs *
578getmntpt(const char *name)
579{
580	struct statfs *mntbuf;
581	int i, mntsize;
582
583	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
584	for (i = mntsize - 1; i >= 0; i--) {
585		if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
586		    strcmp(mntbuf[i].f_mntonname, name) == 0)
587			return (&mntbuf[i]);
588	}
589	return (NULL);
590}
591
592char *
593catopt(char *s0, const char *s1)
594{
595	size_t i;
596	char *cp;
597
598	if (s1 == NULL || *s1 == '\0')
599		return s0;
600
601	if (s0 && *s0) {
602		i = strlen(s0) + strlen(s1) + 1 + 1;
603		if ((cp = malloc(i)) == NULL)
604			errx(1, "malloc failed");
605		(void)snprintf(cp, i, "%s,%s", s0, s1);
606	} else
607		cp = strdup(s1);
608
609	if (s0)
610		free(s0);
611	return (cp);
612}
613
614void
615mangle(options, argcp, argv)
616	char *options;
617	int *argcp;
618	char **argv;
619{
620	char *p, *s;
621	int argc;
622
623	argc = *argcp;
624	for (s = options; (p = strsep(&s, ",")) != NULL;)
625		if (*p != '\0') {
626			if (strcmp(p, "noauto") == 0) {
627				/*
628				 * Do not pass noauto option to nmount().
629				 * or external mount program.  noauto is
630				 * only used to prevent mounting a filesystem
631				 * when 'mount -a' is specified, and is
632				 * not a real mount option.
633				 */
634				continue;
635			} else if (strcmp(p, "userquota") == 0) {
636				continue;
637			} else if (strcmp(p, "groupquota") == 0) {
638				continue;
639			} else if (*p == '-') {
640				argv[argc++] = p;
641				p = strchr(p, '=');
642				if (p != NULL) {
643					*p = '\0';
644					argv[argc++] = p+1;
645				}
646			} else {
647				argv[argc++] = strdup("-o");
648				argv[argc++] = p;
649			}
650		}
651
652	*argcp = argc;
653}
654
655
656char *
657update_options(opts, fstab, curflags)
658	char *opts;
659	char *fstab;
660	int curflags;
661{
662	char *o, *p;
663	char *cur;
664	char *expopt, *newopt, *tmpopt;
665
666	if (opts == NULL)
667		return strdup("");
668
669	/* remove meta options from list */
670	remopt(fstab, MOUNT_META_OPTION_FSTAB);
671	remopt(fstab, MOUNT_META_OPTION_CURRENT);
672	cur = flags2opts(curflags);
673
674	/*
675	 * Expand all meta-options passed to us first.
676	 */
677	expopt = NULL;
678	for (p = opts; (o = strsep(&p, ",")) != NULL;) {
679		if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
680			expopt = catopt(expopt, fstab);
681		else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
682			expopt = catopt(expopt, cur);
683		else
684			expopt = catopt(expopt, o);
685	}
686	free(cur);
687	free(opts);
688
689	/*
690	 * Remove previous contradictory arguments. Given option "foo" we
691	 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
692	 * and "foo" - so we can deal with possible options like "notice".
693	 */
694	newopt = NULL;
695	for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
696		if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
697			errx(1, "malloc failed");
698
699		strcpy(tmpopt, "no");
700		strcat(tmpopt, o);
701		remopt(newopt, tmpopt);
702		free(tmpopt);
703
704		if (strncmp("no", o, 2) == 0)
705			remopt(newopt, o+2);
706
707		newopt = catopt(newopt, o);
708	}
709	free(expopt);
710
711	return newopt;
712}
713
714void
715remopt(string, opt)
716	char *string;
717	const char *opt;
718{
719	char *o, *p, *r;
720
721	if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
722		return;
723
724	r = string;
725
726	for (p = string; (o = strsep(&p, ",")) != NULL;) {
727		if (strcmp(opt, o) != 0) {
728			if (*r == ',' && *o != '\0')
729				r++;
730			while ((*r++ = *o++) != '\0')
731			    ;
732			*--r = ',';
733		}
734	}
735	*r = '\0';
736}
737
738void
739usage()
740{
741
742	(void)fprintf(stderr, "%s\n%s\n%s\n",
743"usage: mount [-adfpruvw] [-F fstab] [-o options] [-t ufs | external_type]",
744"       mount [-dfpruvw] special | node",
745"       mount [-dfpruvw] [-o options] [-t ufs | external_type] special node");
746	exit(1);
747}
748
749void
750putfsent(ent)
751	const struct statfs *ent;
752{
753	struct fstab *fst;
754	char *opts;
755
756	opts = flags2opts(ent->f_flags);
757	printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
758	    ent->f_fstypename, opts);
759	free(opts);
760
761	if ((fst = getfsspec(ent->f_mntfromname)))
762		printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
763	else if ((fst = getfsfile(ent->f_mntonname)))
764		printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
765	else if (strcmp(ent->f_fstypename, "ufs") == 0) {
766		if (strcmp(ent->f_mntonname, "/") == 0)
767			printf("\t1 1\n");
768		else
769			printf("\t2 2\n");
770	} else
771		printf("\t0 0\n");
772}
773
774
775char *
776flags2opts(flags)
777	int flags;
778{
779	char *res;
780
781	res = NULL;
782
783	if (flags & MNT_RDONLY)		res = catopt(res, "ro");
784	if (flags & MNT_SYNCHRONOUS)	res = catopt(res, "sync");
785	if (flags & MNT_NOEXEC)		res = catopt(res, "noexec");
786	if (flags & MNT_NOSUID)		res = catopt(res, "nosuid");
787	if (flags & MNT_UNION)		res = catopt(res, "union");
788	if (flags & MNT_ASYNC)		res = catopt(res, "async");
789	if (flags & MNT_NOATIME)	res = catopt(res, "noatime");
790	if (flags & MNT_NOCLUSTERR)	res = catopt(res, "noclusterr");
791	if (flags & MNT_NOCLUSTERW)	res = catopt(res, "noclusterw");
792	if (flags & MNT_NOSYMFOLLOW)	res = catopt(res, "nosymfollow");
793	if (flags & MNT_SUIDDIR)	res = catopt(res, "suiddir");
794	if (flags & MNT_MULTILABEL)	res = catopt(res, "multilabel");
795	if (flags & MNT_ACLS)		res = catopt(res, "acls");
796
797	return res;
798}
799