mount_msdosfs.c revision 152362 
1/*	$NetBSD: mount_msdos.c,v 1.18 1997/09/16 12:24:18 lukem Exp $	*/
2
3/*
4 * Copyright (c) 1994 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Christopher G. Demetriou.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifndef lint
34static const char rcsid[] =
35  "$FreeBSD: head/sbin/mount_msdosfs/mount_msdosfs.c 152362 2005-11-13 03:24:44Z rodrigc $";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/mount.h>
40#include <sys/stat.h>
41#include <sys/iconv.h>
42#include <sys/linker.h>
43#include <sys/module.h>
44
45#include <ctype.h>
46#include <err.h>
47#include <grp.h>
48#include <locale.h>
49#include <pwd.h>
50#include <stdio.h>
51/* must be after stdio to declare fparseln */
52#include <libutil.h>
53#include <stdlib.h>
54#include <string.h>
55#include <sysexits.h>
56#include <unistd.h>
57
58#include "mntopts.h"
59
60static struct mntopt mopts[] = {
61	MOPT_STDOPTS,
62	MOPT_FORCE,
63	MOPT_SYNC,
64	MOPT_UPDATE,
65	MOPT_END
66};
67
68static gid_t	a_gid(char *);
69static uid_t	a_uid(char *);
70static mode_t	a_mask(char *);
71static void	usage(void) __dead2;
72static int	set_charset(struct iovec *iov, int *iovlen, const char *, const char *);
73
74int
75main(int argc, char **argv)
76{
77        struct iovec *iov = NULL;
78        int iovlen = 0;
79	struct stat sb;
80	int c, mntflags, set_gid, set_uid, set_mask, set_dirmask;
81	int optflags = 0;
82	char *dev, *dir, mntpath[MAXPATHLEN], *csp;
83	char fstype[] = "msdosfs";
84	char *cs_dos = NULL;
85	char *cs_local = NULL;
86	mode_t mask = 0, dirmask = 0;
87	uid_t uid = 0;
88	gid_t gid = 0;
89	getmnt_silent = 1;
90
91	mntflags = set_gid = set_uid = set_mask = set_dirmask = 0;
92
93	while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:")) != -1) {
94		switch (c) {
95		case 's':
96			build_iovec(&iov, &iovlen, "shortnames", NULL, (size_t)-1);
97			break;
98		case 'l':
99			build_iovec(&iov, &iovlen, "longnames", NULL, (size_t)-1);
100			break;
101		case '9':
102			build_iovec_argf(&iov, &iovlen, "nowin95", NULL, (size_t)-1);
103			break;
104		case 'u':
105			uid = a_uid(optarg);
106			set_uid = 1;
107			break;
108		case 'g':
109			gid = a_gid(optarg);
110			set_gid = 1;
111			break;
112		case 'm':
113			mask = a_mask(optarg);
114			set_mask = 1;
115			break;
116		case 'M':
117			dirmask = a_mask(optarg);
118			set_dirmask = 1;
119			break;
120		case 'L': {
121			const char *quirk = NULL;
122			if (setlocale(LC_CTYPE, optarg) == NULL)
123				err(EX_CONFIG, "%s", optarg);
124			csp = strchr(optarg,'.');
125			if (!csp)
126				err(EX_CONFIG, "%s", optarg);
127			quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT);
128			build_iovec_argf(&iov, &iovlen, "cs_local", quirk);
129			}
130			break;
131		case 'D':
132			cs_dos = strdup(optarg);
133			build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
134			break;
135		case 'o': {
136			char *p = NULL;
137			char *val = strdup("");
138			getmntopts(optarg, mopts, &mntflags, &optflags);
139                        p = strchr(optarg, '=');
140                        if (p != NULL) {
141				free(val);
142				*p = '\0';
143				val = p + 1;
144			}
145			build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
146			}
147			break;
148		case 'W':
149			if (strcmp(optarg, "iso22dos") == 0) {
150				cs_local = strdup("ISO8859-2");
151				cs_dos = strdup("CP852");
152			} else if (strcmp(optarg, "iso72dos") == 0) {
153				cs_local = strdup("ISO8859-7");
154				cs_dos = strdup("CP737");
155			} else if (strcmp(optarg, "koi2dos") == 0) {
156				cs_local = strdup("KOI8-R");
157				cs_dos = strdup("CP866");
158			} else if (strcmp(optarg, "koi8u2dos") == 0) {
159				cs_local = strdup("KOI8-U");
160				cs_dos = strdup("CP866");
161			} else {
162				err(EX_NOINPUT, "%s", optarg);
163			}
164			build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1);
165			build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
166			break;
167		case '?':
168		default:
169			usage();
170			break;
171		}
172	}
173
174	if (optind + 2 != argc)
175		usage();
176
177	if (set_mask && !set_dirmask) {
178		dirmask = mask;
179		set_dirmask = 1;
180	}
181	else if (set_dirmask && !set_mask) {
182		mask = dirmask;
183		set_mask = 1;
184	}
185
186	dev = argv[optind];
187	dir = argv[optind + 1];
188
189	if (cs_local != NULL) {
190		if (set_charset(iov, &iovlen, cs_local, cs_dos) == -1)
191			err(EX_OSERR, "msdosfs_iconv");
192		build_iovec_argf(&iov, &iovlen, "kiconv", "");
193	} else if (cs_dos != NULL) {
194		build_iovec_argf(&iov, &iovlen, "cs_local", "ISO8859-1");
195		if (set_charset(iov, &iovlen, "ISO8859-1", cs_dos) == -1)
196			err(EX_OSERR, "msdosfs_iconv");
197		build_iovec_argf(&iov, &iovlen, "kiconv", "");
198	}
199
200	/*
201	 * Resolve the mountpoint with realpath(3) and remove unnecessary
202	 * slashes from the devicename if there are any.
203	 */
204	(void)checkpath(dir, mntpath);
205	(void)rmslashes(dev, dev);
206
207	if (!set_gid || !set_uid || !set_mask) {
208		if (stat(mntpath, &sb) == -1)
209			err(EX_OSERR, "stat %s", mntpath);
210
211		if (!set_uid)
212			uid = sb.st_uid;
213		if (!set_gid)
214			gid = sb.st_gid;
215		if (!set_mask)
216			mask = dirmask =
217				sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
218	}
219
220	build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
221	build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
222	build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
223	build_iovec_argf(&iov, &iovlen, "uid", "%d", uid);
224	build_iovec_argf(&iov, &iovlen, "gid", "%u", gid);
225	build_iovec_argf(&iov, &iovlen, "mask", "%u", mask);
226	build_iovec_argf(&iov, &iovlen, "dirmask", "%u", dirmask);
227
228	if (nmount(iov, iovlen, mntflags) < 0)
229		err(1, "%s", dev);
230
231	exit (0);
232}
233
234gid_t
235a_gid(s)
236	char *s;
237{
238	struct group *gr;
239	char *gname;
240	gid_t gid;
241
242	if ((gr = getgrnam(s)) != NULL)
243		gid = gr->gr_gid;
244	else {
245		for (gname = s; *s && isdigit(*s); ++s);
246		if (!*s)
247			gid = atoi(gname);
248		else
249			errx(EX_NOUSER, "unknown group id: %s", gname);
250	}
251	return (gid);
252}
253
254uid_t
255a_uid(s)
256	char *s;
257{
258	struct passwd *pw;
259	char *uname;
260	uid_t uid;
261
262	if ((pw = getpwnam(s)) != NULL)
263		uid = pw->pw_uid;
264	else {
265		for (uname = s; *s && isdigit(*s); ++s);
266		if (!*s)
267			uid = atoi(uname);
268		else
269			errx(EX_NOUSER, "unknown user id: %s", uname);
270	}
271	return (uid);
272}
273
274mode_t
275a_mask(s)
276	char *s;
277{
278	int done, rv;
279	char *ep;
280
281	done = 0;
282	rv = -1;
283	if (*s >= '0' && *s <= '7') {
284		done = 1;
285		rv = strtol(optarg, &ep, 8);
286	}
287	if (!done || rv < 0 || *ep)
288		errx(EX_USAGE, "invalid file mode: %s", s);
289	return (rv);
290}
291
292void
293usage()
294{
295	fprintf(stderr, "%s\n%s\n%s\n",
296	"usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]",
297	"                     [-M mask] [-m mask] [-o options] [-u uid]",
298	"		      [-W table] special node");
299	exit(EX_USAGE);
300}
301
302int
303set_charset(struct iovec *iov, int *iovlen, const char *cs_local, const char *cs_dos)
304{
305	int error;
306
307	if (modfind("msdosfs_iconv") < 0)
308		if (kldload("msdosfs_iconv") < 0 || modfind("msdosfs_iconv") < 0) {
309			warnx("cannot find or load \"msdosfs_iconv\" kernel module");
310			return (-1);
311		}
312
313        build_iovec_argf(&iov, iovlen, "cs_win", ENCODING_UNICODE);
314	error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local);
315	if (error)
316		return (-1);
317	if (cs_dos != NULL) {
318		error = kiconv_add_xlat16_cspairs(cs_dos, cs_local);
319		if (error)
320			return (-1);
321	} else {
322		build_iovec_argf(&iov, iovlen, "cs_dos", cs_local);
323		error = kiconv_add_xlat16_cspair(cs_local, cs_local,
324				KICONV_FROM_UPPER | KICONV_LOWER);
325		if (error)
326			return (-1);
327	}
328
329	return (0);
330}
331