mount_msdosfs.c revision 101270 
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 101270 2002-08-03 16:03:21Z mux $";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/mount.h>
40#include <sys/stat.h>
41
42#include <fs/msdosfs/msdosfsmount.h>
43
44#include <ctype.h>
45#include <err.h>
46#include <grp.h>
47#include <locale.h>
48#include <pwd.h>
49#include <stdio.h>
50/* must be after stdio to declare fparseln */
51#include <libutil.h>
52#include <stdlib.h>
53#include <string.h>
54#include <sysexits.h>
55#include <unistd.h>
56
57#include "mntopts.h"
58
59/*
60 * XXX - no way to specify "foo=<bar>"-type options; that's what we'd
61 * want for "-u", "-g", "-m", "-L", and "-W".
62 */
63static struct mntopt mopts[] = {
64	MOPT_STDOPTS,
65	MOPT_FORCE,
66	MOPT_SYNC,
67	MOPT_UPDATE,
68#ifdef MSDOSFSMNT_GEMDOSFS
69	{ "gemdosfs", 0, MSDOSFSMNT_GEMDOSFS, 1 },
70#endif
71	{ "shortnames", 0, MSDOSFSMNT_SHORTNAME, 1 },
72	{ "longnames", 0, MSDOSFSMNT_LONGNAME, 1 },
73	{ "nowin95", 0, MSDOSFSMNT_NOWIN95, 1 },
74	{ NULL }
75};
76
77static gid_t	a_gid(char *);
78static uid_t	a_uid(char *);
79static mode_t	a_mask(char *);
80static void	usage(void) __dead2;
81static void     load_u2wtable(struct msdosfs_args *, char *);
82static void     load_ultable(struct msdosfs_args *, char *);
83
84int
85main(argc, argv)
86	int argc;
87	char **argv;
88{
89	struct msdosfs_args args;
90	struct stat sb;
91	int c, mntflags, set_gid, set_uid, set_mask;
92	char *dev, *dir, mntpath[MAXPATHLEN];
93
94	mntflags = set_gid = set_uid = set_mask = 0;
95	(void)memset(&args, '\0', sizeof(args));
96	args.magic = MSDOSFS_ARGSMAGIC;
97
98	while ((c = getopt(argc, argv, "sl9u:g:m:o:L:W:")) != -1) {
99		switch (c) {
100#ifdef MSDOSFSMNT_GEMDOSFS
101		case 'G':
102			args.flags |= MSDOSFSMNT_GEMDOSFS;
103			break;
104#endif
105		case 's':
106			args.flags |= MSDOSFSMNT_SHORTNAME;
107			break;
108		case 'l':
109			args.flags |= MSDOSFSMNT_LONGNAME;
110			break;
111		case '9':
112			args.flags |= MSDOSFSMNT_NOWIN95;
113			break;
114		case 'u':
115			args.uid = a_uid(optarg);
116			set_uid = 1;
117			break;
118		case 'g':
119			args.gid = a_gid(optarg);
120			set_gid = 1;
121			break;
122		case 'm':
123			args.mask = a_mask(optarg);
124			set_mask = 1;
125			break;
126		case 'L':
127			load_ultable(&args, optarg);
128			args.flags |= MSDOSFSMNT_ULTABLE;
129			break;
130		case 'W':
131			load_u2wtable(&args, optarg);
132			args.flags |= MSDOSFSMNT_U2WTABLE;
133			break;
134		case 'o':
135			getmntopts(optarg, mopts, &mntflags, &args.flags);
136			break;
137		case '?':
138		default:
139			usage();
140			break;
141		}
142	}
143
144	if (optind + 2 != argc)
145		usage();
146
147	dev = argv[optind];
148	dir = argv[optind + 1];
149
150	/*
151	 * Resolve the mountpoint with realpath(3) and remove unnecessary
152	 * slashes from the devicename if there are any.
153	 */
154	(void)checkpath(dir, mntpath);
155	(void)rmslashes(dev, dev);
156
157	args.fspec = dev;
158	args.export.ex_root = -2;	/* unchecked anyway on DOS fs */
159	if (mntflags & MNT_RDONLY)
160		args.export.ex_flags = MNT_EXRDONLY;
161	else
162		args.export.ex_flags = 0;
163	if (!set_gid || !set_uid || !set_mask) {
164		if (stat(mntpath, &sb) == -1)
165			err(EX_OSERR, "stat %s", mntpath);
166
167		if (!set_uid)
168			args.uid = sb.st_uid;
169		if (!set_gid)
170			args.gid = sb.st_gid;
171		if (!set_mask)
172			args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
173	}
174
175	if (mount("msdosfs", mntpath, mntflags, &args) < 0)
176		err(EX_OSERR, "%s", dev);
177
178	exit (0);
179}
180
181gid_t
182a_gid(s)
183	char *s;
184{
185	struct group *gr;
186	char *gname;
187	gid_t gid;
188
189	if ((gr = getgrnam(s)) != NULL)
190		gid = gr->gr_gid;
191	else {
192		for (gname = s; *s && isdigit(*s); ++s);
193		if (!*s)
194			gid = atoi(gname);
195		else
196			errx(EX_NOUSER, "unknown group id: %s", gname);
197	}
198	return (gid);
199}
200
201uid_t
202a_uid(s)
203	char *s;
204{
205	struct passwd *pw;
206	char *uname;
207	uid_t uid;
208
209	if ((pw = getpwnam(s)) != NULL)
210		uid = pw->pw_uid;
211	else {
212		for (uname = s; *s && isdigit(*s); ++s);
213		if (!*s)
214			uid = atoi(uname);
215		else
216			errx(EX_NOUSER, "unknown user id: %s", uname);
217	}
218	return (uid);
219}
220
221mode_t
222a_mask(s)
223	char *s;
224{
225	int done, rv;
226	char *ep;
227
228	done = 0;
229	rv = -1;
230	if (*s >= '0' && *s <= '7') {
231		done = 1;
232		rv = strtol(optarg, &ep, 8);
233	}
234	if (!done || rv < 0 || *ep)
235		errx(EX_USAGE, "invalid file mode: %s", s);
236	return (rv);
237}
238
239void
240usage()
241{
242	fprintf(stderr, "%s\n%s\n",
243	"usage: mount_msdosfs [-o options] [-u user] [-g group] [-m mask]",
244	"                     [-s] [-l] [-9] [-L locale] [-W table] bdev dir");
245	exit(EX_USAGE);
246}
247
248void
249load_u2wtable (pargs, name)
250	struct msdosfs_args *pargs;
251	char *name;
252{
253	FILE *f;
254	int i, j, code[8];
255	size_t line = 0;
256	char buf[128];
257	char *fn, *s, *p;
258
259	if (*name == '/')
260		fn = name;
261	else {
262		snprintf(buf, sizeof(buf), "/usr/libdata/msdosfs/%s", name);
263		buf[127] = '\0';
264		fn = buf;
265	}
266	if ((f = fopen(fn, "r")) == NULL)
267		err(EX_NOINPUT, "%s", fn);
268	p = NULL;
269	for (i = 0; i < 16; i++) {
270		do {
271			if (p != NULL) free(p);
272			if ((p = s = fparseln(f, NULL, &line, NULL, 0)) == NULL)
273				errx(EX_DATAERR, "can't read u2w table row %d near line %d", i, line);
274			while (isspace((unsigned char)*s))
275				s++;
276		} while (*s == '\0');
277		if (sscanf(s, "%i%i%i%i%i%i%i%i",
278code, code + 1, code + 2, code + 3, code + 4, code + 5, code + 6, code + 7) != 8)
279			errx(EX_DATAERR, "u2w table: missing item(s) in row %d, line %d", i, line);
280		for (j = 0; j < 8; j++)
281			pargs->u2w[i * 8 + j] = code[j];
282	}
283	for (i = 0; i < 16; i++) {
284		do {
285			free(p);
286			if ((p = s = fparseln(f, NULL, &line, NULL, 0)) == NULL)
287				errx(EX_DATAERR, "can't read d2u table row %d near line %d", i, line);
288			while (isspace((unsigned char)*s))
289				s++;
290		} while (*s == '\0');
291		if (sscanf(s, "%i%i%i%i%i%i%i%i",
292code, code + 1, code + 2, code + 3, code + 4, code + 5, code + 6, code + 7) != 8)
293			errx(EX_DATAERR, "d2u table: missing item(s) in row %d, line %d", i, line);
294		for (j = 0; j < 8; j++)
295			pargs->d2u[i * 8 + j] = code[j];
296	}
297	for (i = 0; i < 16; i++) {
298		do {
299			free(p);
300			if ((p = s = fparseln(f, NULL, &line, NULL, 0)) == NULL)
301				errx(EX_DATAERR, "can't read u2d table row %d near line %d", i, line);
302			while (isspace((unsigned char)*s))
303				s++;
304		} while (*s == '\0');
305		if (sscanf(s, "%i%i%i%i%i%i%i%i",
306code, code + 1, code + 2, code + 3, code + 4, code + 5, code + 6, code + 7) != 8)
307			errx(EX_DATAERR, "u2d table: missing item(s) in row %d, line %d", i, line);
308		for (j = 0; j < 8; j++)
309			pargs->u2d[i * 8 + j] = code[j];
310	}
311	free(p);
312	fclose(f);
313}
314
315void
316load_ultable (pargs, name)
317	struct msdosfs_args *pargs;
318	char *name;
319{
320	int i;
321
322	if (setlocale(LC_CTYPE, name) == NULL)
323		err(EX_CONFIG, "%s", name);
324	for (i = 0; i < 128; i++) {
325		pargs->ul[i] = tolower(i | 0x80);
326		pargs->lu[i] = toupper(i | 0x80);
327	}
328}
329