mount_msdosfs.c revision 152974 
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 152974 2005-12-01 00:18:48Z avatar $";
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:W:")) != -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", "", (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			cs_local = strdup(quirk);
130			}
131			break;
132		case 'D':
133			cs_dos = strdup(optarg);
134			build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
135			break;
136		case 'o': {
137			char *p = NULL;
138			char *val = strdup("");
139			getmntopts(optarg, mopts, &mntflags, &optflags);
140			p = strchr(optarg, '=');
141			if (p != NULL) {
142				free(val);
143				*p = '\0';
144				val = p + 1;
145			}
146			build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
147			}
148			break;
149		case 'W':
150			if (strcmp(optarg, "iso22dos") == 0) {
151				cs_local = strdup("ISO8859-2");
152				cs_dos = strdup("CP852");
153			} else if (strcmp(optarg, "iso72dos") == 0) {
154				cs_local = strdup("ISO8859-7");
155				cs_dos = strdup("CP737");
156			} else if (strcmp(optarg, "koi2dos") == 0) {
157				cs_local = strdup("KOI8-R");
158				cs_dos = strdup("CP866");
159			} else if (strcmp(optarg, "koi8u2dos") == 0) {
160				cs_local = strdup("KOI8-U");
161				cs_dos = strdup("CP866");
162			} else {
163				err(EX_NOINPUT, "%s", optarg);
164			}
165			build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1);
166			build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
167			break;
168		case '?':
169		default:
170			usage();
171			break;
172		}
173	}
174
175	if (optind + 2 != argc)
176		usage();
177
178	if (set_mask && !set_dirmask) {
179		dirmask = mask;
180		set_dirmask = 1;
181	}
182	else if (set_dirmask && !set_mask) {
183		mask = dirmask;
184		set_mask = 1;
185	}
186
187	dev = argv[optind];
188	dir = argv[optind + 1];
189
190	if (cs_local != NULL) {
191		if (set_charset(&iov, &iovlen, cs_local, cs_dos) == -1)
192			err(EX_OSERR, "msdosfs_iconv");
193		build_iovec_argf(&iov, &iovlen, "kiconv", "");
194	} else if (cs_dos != NULL) {
195		build_iovec_argf(&iov, &iovlen, "cs_local", "ISO8859-1");
196		if (set_charset(&iov, &iovlen, "ISO8859-1", cs_dos) == -1)
197			err(EX_OSERR, "msdosfs_iconv");
198		build_iovec_argf(&iov, &iovlen, "kiconv", "");
199	}
200
201	/*
202	 * Resolve the mountpoint with realpath(3) and remove unnecessary
203	 * slashes from the devicename if there are any.
204	 */
205	(void)checkpath(dir, mntpath);
206	(void)rmslashes(dev, dev);
207
208	if (!set_gid || !set_uid || !set_mask) {
209		if (stat(mntpath, &sb) == -1)
210			err(EX_OSERR, "stat %s", mntpath);
211
212		if (!set_uid)
213			uid = sb.st_uid;
214		if (!set_gid)
215			gid = sb.st_gid;
216		if (!set_mask)
217			mask = dirmask =
218				sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
219	}
220
221	build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
222	build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
223	build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
224	build_iovec_argf(&iov, &iovlen, "uid", "%d", uid);
225	build_iovec_argf(&iov, &iovlen, "gid", "%u", gid);
226	build_iovec_argf(&iov, &iovlen, "mask", "%u", mask);
227	build_iovec_argf(&iov, &iovlen, "dirmask", "%u", dirmask);
228
229	if (nmount(iov, iovlen, mntflags) < 0)
230		err(1, "%s", dev);
231
232	exit (0);
233}
234
235gid_t
236a_gid(s)
237	char *s;
238{
239	struct group *gr;
240	char *gname;
241	gid_t gid;
242
243	if ((gr = getgrnam(s)) != NULL)
244		gid = gr->gr_gid;
245	else {
246		for (gname = s; *s && isdigit(*s); ++s);
247		if (!*s)
248			gid = atoi(gname);
249		else
250			errx(EX_NOUSER, "unknown group id: %s", gname);
251	}
252	return (gid);
253}
254
255uid_t
256a_uid(s)
257	char *s;
258{
259	struct passwd *pw;
260	char *uname;
261	uid_t uid;
262
263	if ((pw = getpwnam(s)) != NULL)
264		uid = pw->pw_uid;
265	else {
266		for (uname = s; *s && isdigit(*s); ++s);
267		if (!*s)
268			uid = atoi(uname);
269		else
270			errx(EX_NOUSER, "unknown user id: %s", uname);
271	}
272	return (uid);
273}
274
275mode_t
276a_mask(s)
277	char *s;
278{
279	int done, rv;
280	char *ep;
281
282	done = 0;
283	rv = -1;
284	if (*s >= '0' && *s <= '7') {
285		done = 1;
286		rv = strtol(optarg, &ep, 8);
287	}
288	if (!done || rv < 0 || *ep)
289		errx(EX_USAGE, "invalid file mode: %s", s);
290	return (rv);
291}
292
293void
294usage()
295{
296	fprintf(stderr, "%s\n%s\n%s\n",
297	"usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]",
298	"                     [-M mask] [-m mask] [-o options] [-u uid]",
299	"		      [-W table] special node");
300	exit(EX_USAGE);
301}
302
303int
304set_charset(struct iovec **iov, int *iovlen, const char *cs_local, const char *cs_dos)
305{
306	int error;
307
308	if (modfind("msdosfs_iconv") < 0)
309		if (kldload("msdosfs_iconv") < 0 || modfind("msdosfs_iconv") < 0) {
310			warnx("cannot find or load \"msdosfs_iconv\" kernel module");
311			return (-1);
312		}
313
314	build_iovec_argf(iov, iovlen, "cs_win", ENCODING_UNICODE);
315	error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local);
316	if (error)
317		return (-1);
318	if (cs_dos != NULL) {
319		error = kiconv_add_xlat16_cspairs(cs_dos, cs_local);
320		if (error)
321			return (-1);
322	} else {
323		build_iovec_argf(iov, iovlen, "cs_dos", cs_local);
324		error = kiconv_add_xlat16_cspair(cs_local, cs_local,
325				KICONV_FROM_UPPER | KICONV_LOWER);
326		if (error)
327			return (-1);
328	}
329
330	return (0);
331}
332