mount_msdosfs.c revision 201227 
1118031Sobrien/*	$NetBSD: mount_msdos.c,v 1.18 1997/09/16 12:24:18 lukem Exp $	*/
2118031Sobrien
3114987Speter/*
4114987Speter * Copyright (c) 1994 Christopher G. Demetriou
5114987Speter * All rights reserved.
6114987Speter *
7114987Speter * Redistribution and use in source and binary forms, with or without
8114987Speter * modification, are permitted provided that the following conditions
9114987Speter * are met:
10114987Speter * 1. Redistributions of source code must retain the above copyright
11163018Sdavidxu *    notice, this list of conditions and the following disclaimer.
12119334Speter * 2. Redistributions in binary form must reproduce the above copyright
13114987Speter *    notice, this list of conditions and the following disclaimer in the
14114987Speter *    documentation and/or other materials provided with the distribution.
15114987Speter * 3. All advertising materials mentioning features or use of this software
16220238Skib *    must display the following acknowledgement:
17220238Skib *      This product includes software developed by Christopher G. Demetriou.
18220238Skib * 4. The name of the author may not be used to endorse or promote products
19114987Speter *    derived from this software without specific prior written permission
20114987Speter *
21114987Speter * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22114987Speter * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23114987Speter * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24126090Speter * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25114987Speter * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26114987Speter * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27114987Speter * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28114987Speter * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29114987Speter * (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 201227 2009-12-29 22:53:27Z ed $";
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 gid_t	a_gid(char *);
61static uid_t	a_uid(char *);
62static mode_t	a_mask(char *);
63static void	usage(void) __dead2;
64static int	set_charset(struct iovec **iov, int *iovlen, const char *, const char *);
65
66int
67main(int argc, char **argv)
68{
69	struct iovec *iov = NULL;
70	int iovlen = 0;
71	struct stat sb;
72	int c, mntflags, set_gid, set_uid, set_mask, set_dirmask;
73	char *dev, *dir, mntpath[MAXPATHLEN], *csp;
74	char fstype[] = "msdosfs";
75	char errmsg[255] = {0};
76	char *cs_dos = NULL;
77	char *cs_local = NULL;
78	mode_t mask = 0, dirmask = 0;
79	uid_t uid = 0;
80	gid_t gid = 0;
81	getmnt_silent = 1;
82
83	mntflags = set_gid = set_uid = set_mask = set_dirmask = 0;
84
85	while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:W:")) != -1) {
86		switch (c) {
87		case 's':
88			build_iovec(&iov, &iovlen, "shortnames", NULL, (size_t)-1);
89			break;
90		case 'l':
91			build_iovec(&iov, &iovlen, "longnames", NULL, (size_t)-1);
92			break;
93		case '9':
94			build_iovec_argf(&iov, &iovlen, "nowin95", "", (size_t)-1);
95			break;
96		case 'u':
97			uid = a_uid(optarg);
98			set_uid = 1;
99			break;
100		case 'g':
101			gid = a_gid(optarg);
102			set_gid = 1;
103			break;
104		case 'm':
105			mask = a_mask(optarg);
106			set_mask = 1;
107			break;
108		case 'M':
109			dirmask = a_mask(optarg);
110			set_dirmask = 1;
111			break;
112		case 'L': {
113			const char *quirk = NULL;
114			if (setlocale(LC_CTYPE, optarg) == NULL)
115				err(EX_CONFIG, "%s", optarg);
116			csp = strchr(optarg,'.');
117			if (!csp)
118				err(EX_CONFIG, "%s", optarg);
119			quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT);
120			build_iovec_argf(&iov, &iovlen, "cs_local", quirk);
121			cs_local = strdup(quirk);
122			}
123			break;
124		case 'D':
125			cs_dos = strdup(optarg);
126			build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
127			break;
128		case 'o': {
129			char *p = NULL;
130			char *val = strdup("");
131			p = strchr(optarg, '=');
132			if (p != NULL) {
133				free(val);
134				*p = '\0';
135				val = p + 1;
136			}
137			build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
138			}
139			break;
140		case 'W':
141			if (strcmp(optarg, "iso22dos") == 0) {
142				cs_local = strdup("ISO8859-2");
143				cs_dos = strdup("CP852");
144			} else if (strcmp(optarg, "iso72dos") == 0) {
145				cs_local = strdup("ISO8859-7");
146				cs_dos = strdup("CP737");
147			} else if (strcmp(optarg, "koi2dos") == 0) {
148				cs_local = strdup("KOI8-R");
149				cs_dos = strdup("CP866");
150			} else if (strcmp(optarg, "koi8u2dos") == 0) {
151				cs_local = strdup("KOI8-U");
152				cs_dos = strdup("CP866");
153			} else {
154				err(EX_NOINPUT, "%s", optarg);
155			}
156			build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1);
157			build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
158			break;
159		case '?':
160		default:
161			usage();
162			break;
163		}
164	}
165
166	if (optind + 2 != argc)
167		usage();
168
169	if (set_mask && !set_dirmask) {
170		dirmask = mask;
171		set_dirmask = 1;
172	}
173	else if (set_dirmask && !set_mask) {
174		mask = dirmask;
175		set_mask = 1;
176	}
177
178	dev = argv[optind];
179	dir = argv[optind + 1];
180
181	if (cs_local != NULL) {
182		if (set_charset(&iov, &iovlen, cs_local, cs_dos) == -1)
183			err(EX_OSERR, "msdosfs_iconv");
184		build_iovec_argf(&iov, &iovlen, "kiconv", "");
185	} else if (cs_dos != NULL) {
186		build_iovec_argf(&iov, &iovlen, "cs_local", "ISO8859-1");
187		if (set_charset(&iov, &iovlen, "ISO8859-1", cs_dos) == -1)
188			err(EX_OSERR, "msdosfs_iconv");
189		build_iovec_argf(&iov, &iovlen, "kiconv", "");
190	}
191
192	/*
193	 * Resolve the mountpoint with realpath(3) and remove unnecessary
194	 * slashes from the devicename if there are any.
195	 */
196	(void)checkpath(dir, mntpath);
197	(void)rmslashes(dev, dev);
198
199	if (!set_gid || !set_uid || !set_mask) {
200		if (stat(mntpath, &sb) == -1)
201			err(EX_OSERR, "stat %s", mntpath);
202
203		if (!set_uid)
204			uid = sb.st_uid;
205		if (!set_gid)
206			gid = sb.st_gid;
207		if (!set_mask)
208			mask = dirmask =
209				sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
210	}
211
212	build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
213	build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
214	build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
215	build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
216	build_iovec_argf(&iov, &iovlen, "uid", "%d", uid);
217	build_iovec_argf(&iov, &iovlen, "gid", "%u", gid);
218	build_iovec_argf(&iov, &iovlen, "mask", "%u", mask);
219	build_iovec_argf(&iov, &iovlen, "dirmask", "%u", dirmask);
220
221	if (nmount(iov, iovlen, mntflags) < 0) {
222		if (errmsg[0])
223			err(1, "%s: %s", dev, errmsg);
224		else
225			err(1, "%s", dev);
226	}
227
228	exit (0);
229}
230
231gid_t
232a_gid(char *s)
233{
234	struct group *gr;
235	char *gname;
236	gid_t gid;
237
238	if ((gr = getgrnam(s)) != NULL)
239		gid = gr->gr_gid;
240	else {
241		for (gname = s; *s && isdigit(*s); ++s);
242		if (!*s)
243			gid = atoi(gname);
244		else
245			errx(EX_NOUSER, "unknown group id: %s", gname);
246	}
247	return (gid);
248}
249
250uid_t
251a_uid(char *s)
252{
253	struct passwd *pw;
254	char *uname;
255	uid_t uid;
256
257	if ((pw = getpwnam(s)) != NULL)
258		uid = pw->pw_uid;
259	else {
260		for (uname = s; *s && isdigit(*s); ++s);
261		if (!*s)
262			uid = atoi(uname);
263		else
264			errx(EX_NOUSER, "unknown user id: %s", uname);
265	}
266	return (uid);
267}
268
269mode_t
270a_mask(char *s)
271{
272	int done, rv;
273	char *ep;
274
275	done = 0;
276	rv = -1;
277	if (*s >= '0' && *s <= '7') {
278		done = 1;
279		rv = strtol(optarg, &ep, 8);
280	}
281	if (!done || rv < 0 || *ep)
282		errx(EX_USAGE, "invalid file mode: %s", s);
283	return (rv);
284}
285
286void
287usage(void)
288{
289	fprintf(stderr, "%s\n%s\n%s\n",
290	"usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]",
291	"                     [-M mask] [-m mask] [-o options] [-u uid]",
292	"		      [-W table] special node");
293	exit(EX_USAGE);
294}
295
296int
297set_charset(struct iovec **iov, int *iovlen, const char *cs_local, const char *cs_dos)
298{
299	int error;
300
301	if (modfind("msdosfs_iconv") < 0)
302		if (kldload("msdosfs_iconv") < 0 || modfind("msdosfs_iconv") < 0) {
303			warnx("cannot find or load \"msdosfs_iconv\" kernel module");
304			return (-1);
305		}
306
307	build_iovec_argf(iov, iovlen, "cs_win", ENCODING_UNICODE);
308	error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local);
309	if (error)
310		return (-1);
311	if (cs_dos != NULL) {
312		error = kiconv_add_xlat16_cspairs(cs_dos, cs_local);
313		if (error)
314			return (-1);
315	} else {
316		build_iovec_argf(iov, iovlen, "cs_dos", cs_local);
317		error = kiconv_add_xlat16_cspair(cs_local, cs_local,
318				KICONV_FROM_UPPER | KICONV_LOWER);
319		if (error)
320			return (-1);
321	}
322
323	return (0);
324}
325