mount_msdosfs.c revision 147242 
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 147242 2005-06-10 09:51:43Z delphij $";
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 <fs/msdosfs/msdosfsmount.h>
46
47#include <ctype.h>
48#include <err.h>
49#include <grp.h>
50#include <locale.h>
51#include <pwd.h>
52#include <stdio.h>
53/* must be after stdio to declare fparseln */
54#include <libutil.h>
55#include <stdlib.h>
56#include <string.h>
57#include <sysexits.h>
58#include <unistd.h>
59
60#include "mntopts.h"
61
62#define TRANSITION_PERIOD_HACK
63
64/*
65 * XXX - no way to specify "foo=<bar>"-type options; that's what we'd
66 * want for "-u", "-g", "-m", "-M", "-L", "-D", and "-W".
67 */
68static struct mntopt mopts[] = {
69	MOPT_STDOPTS,
70	MOPT_FORCE,
71	MOPT_SYNC,
72	MOPT_UPDATE,
73	{ "shortnames", 0, MSDOSFSMNT_SHORTNAME, 1 },
74	{ "longnames", 0, MSDOSFSMNT_LONGNAME, 1 },
75	{ "nowin95", 0, MSDOSFSMNT_NOWIN95, 1 },
76	MOPT_END
77};
78
79static gid_t	a_gid(char *);
80static uid_t	a_uid(char *);
81static mode_t	a_mask(char *);
82static void	usage(void) __dead2;
83static int	set_charset(struct msdosfs_args *);
84
85int
86main(int argc, char **argv)
87{
88	struct msdosfs_args args;
89	struct stat sb;
90	int c, mntflags, set_gid, set_uid, set_mask, set_dirmask;
91	char *dev, *dir, mntpath[MAXPATHLEN], *csp;
92
93	mntflags = set_gid = set_uid = set_mask = set_dirmask = 0;
94	(void)memset(&args, '\0', sizeof(args));
95	args.magic = MSDOSFS_ARGSMAGIC;
96
97	args.cs_win = NULL;
98	args.cs_dos = NULL;
99	args.cs_local = NULL;
100#ifdef TRANSITION_PERIOD_HACK
101	while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:W:")) != -1) {
102#else
103	while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:")) != -1) {
104#endif
105		switch (c) {
106		case 's':
107			args.flags |= MSDOSFSMNT_SHORTNAME;
108			break;
109		case 'l':
110			args.flags |= MSDOSFSMNT_LONGNAME;
111			break;
112		case '9':
113			args.flags |= MSDOSFSMNT_NOWIN95;
114			break;
115		case 'u':
116			args.uid = a_uid(optarg);
117			set_uid = 1;
118			break;
119		case 'g':
120			args.gid = a_gid(optarg);
121			set_gid = 1;
122			break;
123		case 'm':
124			args.mask = a_mask(optarg);
125			set_mask = 1;
126			break;
127		case 'M':
128			args.dirmask = a_mask(optarg);
129			set_dirmask = 1;
130			break;
131		case 'L':
132			if (setlocale(LC_CTYPE, optarg) == NULL)
133				err(EX_CONFIG, "%s", optarg);
134			csp = strchr(optarg,'.');
135			if (!csp)
136				err(EX_CONFIG, "%s", optarg);
137			args.cs_local = malloc(ICONV_CSNMAXLEN);
138			if (args.cs_local == NULL)
139				err(EX_OSERR, "malloc()");
140			strncpy(args.cs_local,
141			    kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT),
142			    ICONV_CSNMAXLEN);
143			break;
144		case 'D':
145			args.cs_dos = malloc(ICONV_CSNMAXLEN);
146			if (args.cs_dos == NULL)
147				err(EX_OSERR, "malloc()");
148			strncpy(args.cs_dos, optarg, ICONV_CSNMAXLEN);
149			break;
150		case 'o':
151			getmntopts(optarg, mopts, &mntflags, &args.flags);
152			break;
153#ifdef TRANSITION_PERIOD_HACK
154		case 'W':
155			args.cs_local = malloc(ICONV_CSNMAXLEN);
156			if (args.cs_local == NULL)
157				err(EX_OSERR, "malloc()");
158			args.cs_dos = malloc(ICONV_CSNMAXLEN);
159			if (args.cs_dos == NULL)
160				err(EX_OSERR, "malloc()");
161			if (strcmp(optarg, "iso22dos") == 0) {
162				strcpy(args.cs_local, "ISO8859-2");
163				strcpy(args.cs_dos, "CP852");
164			} else if (strcmp(optarg, "iso72dos") == 0) {
165				strcpy(args.cs_local, "ISO8859-7");
166				strcpy(args.cs_dos, "CP737");
167			} else if (strcmp(optarg, "koi2dos") == 0) {
168				strcpy(args.cs_local, "KOI8-R");
169				strcpy(args.cs_dos, "CP866");
170			} else if (strcmp(optarg, "koi8u2dos") == 0) {
171				strcpy(args.cs_local, "KOI8-U");
172				strcpy(args.cs_dos, "CP866");
173			} else {
174				err(EX_NOINPUT, "%s", optarg);
175			}
176			break;
177#endif /* TRANSITION_PERIOD_HACK */
178		case '?':
179		default:
180			usage();
181			break;
182		}
183	}
184
185	if (optind + 2 != argc)
186		usage();
187
188	if (set_mask && !set_dirmask) {
189		args.dirmask = args.mask;
190		set_dirmask = 1;
191	}
192	else if (set_dirmask && !set_mask) {
193		args.mask = args.dirmask;
194		set_mask = 1;
195	}
196
197	dev = argv[optind];
198	dir = argv[optind + 1];
199
200	if (args.cs_local) {
201		if (set_charset(&args) == -1)
202			err(EX_OSERR, "msdosfs_iconv");
203		args.flags |= MSDOSFSMNT_KICONV;
204	} else if (args.cs_dos) {
205		if ((args.cs_local = malloc(ICONV_CSNMAXLEN)) == NULL)
206			err(EX_OSERR, "malloc()");
207		strcpy(args.cs_local, "ISO8859-1");
208		if (set_charset(&args) == -1)
209			err(EX_OSERR, "msdosfs_iconv");
210		args.flags |= MSDOSFSMNT_KICONV;
211	}
212
213	/*
214	 * Resolve the mountpoint with realpath(3) and remove unnecessary
215	 * slashes from the devicename if there are any.
216	 */
217	(void)checkpath(dir, mntpath);
218	(void)rmslashes(dev, dev);
219
220	args.fspec = dev;
221	args.export.ex_root = -2;	/* unchecked anyway on DOS fs */
222	if (mntflags & MNT_RDONLY)
223		args.export.ex_flags = MNT_EXRDONLY;
224	else
225		args.export.ex_flags = 0;
226	if (!set_gid || !set_uid || !set_mask) {
227		if (stat(mntpath, &sb) == -1)
228			err(EX_OSERR, "stat %s", mntpath);
229
230		if (!set_uid)
231			args.uid = sb.st_uid;
232		if (!set_gid)
233			args.gid = sb.st_gid;
234		if (!set_mask)
235			args.mask = args.dirmask =
236				sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
237	}
238
239	if (mount("msdosfs", mntpath, mntflags, &args) < 0)
240		err(EX_OSERR, "%s", dev);
241
242	exit (0);
243}
244
245gid_t
246a_gid(s)
247	char *s;
248{
249	struct group *gr;
250	char *gname;
251	gid_t gid;
252
253	if ((gr = getgrnam(s)) != NULL)
254		gid = gr->gr_gid;
255	else {
256		for (gname = s; *s && isdigit(*s); ++s);
257		if (!*s)
258			gid = atoi(gname);
259		else
260			errx(EX_NOUSER, "unknown group id: %s", gname);
261	}
262	return (gid);
263}
264
265uid_t
266a_uid(s)
267	char *s;
268{
269	struct passwd *pw;
270	char *uname;
271	uid_t uid;
272
273	if ((pw = getpwnam(s)) != NULL)
274		uid = pw->pw_uid;
275	else {
276		for (uname = s; *s && isdigit(*s); ++s);
277		if (!*s)
278			uid = atoi(uname);
279		else
280			errx(EX_NOUSER, "unknown user id: %s", uname);
281	}
282	return (uid);
283}
284
285mode_t
286a_mask(s)
287	char *s;
288{
289	int done, rv;
290	char *ep;
291
292	done = 0;
293	rv = -1;
294	if (*s >= '0' && *s <= '7') {
295		done = 1;
296		rv = strtol(optarg, &ep, 8);
297	}
298	if (!done || rv < 0 || *ep)
299		errx(EX_USAGE, "invalid file mode: %s", s);
300	return (rv);
301}
302
303void
304usage()
305{
306#ifdef TRANSITION_PERIOD_HACK
307	fprintf(stderr, "%s\n%s\n%s\n",
308	"usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]",
309	"                     [-M mask] [-m mask] [-o options] [-u uid]",
310	"		      [-W table] special node");
311#else
312	fprintf(stderr, "%s\n%s\n%s\n",
313	"usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]",
314	"                     [-M mask] [-m mask] [-o options] [-u uid]",
315	"		      special node");
316#endif
317	exit(EX_USAGE);
318}
319
320int
321set_charset(struct msdosfs_args *args)
322{
323	int error;
324
325	if (modfind("msdosfs_iconv") < 0)
326		if (kldload("msdosfs_iconv") < 0 || modfind("msdosfs_iconv") < 0) {
327			warnx("cannot find or load \"msdosfs_iconv\" kernel module");
328			return (-1);
329		}
330
331	if ((args->cs_win = malloc(ICONV_CSNMAXLEN)) == NULL)
332		return (-1);
333	strncpy(args->cs_win, ENCODING_UNICODE, ICONV_CSNMAXLEN);
334	error = kiconv_add_xlat16_cspairs(args->cs_win, args->cs_local);
335	if (error)
336		return (-1);
337	if (args->cs_dos) {
338		error = kiconv_add_xlat16_cspairs(args->cs_dos, args->cs_local);
339		if (error)
340			return (-1);
341	} else {
342		if ((args->cs_dos = malloc(ICONV_CSNMAXLEN)) == NULL)
343			return (-1);
344		strcpy(args->cs_dos, args->cs_local);
345		error = kiconv_add_xlat16_cspair(args->cs_local, args->cs_local,
346				KICONV_FROM_UPPER | KICONV_LOWER);
347		if (error)
348			return (-1);
349	}
350
351	return (0);
352}
353