mount_msdosfs.c revision 48002 
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	"$Id: mount_msdos.c,v 1.15 1998/06/30 06:23:42 charnier Exp $";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/mount.h>
40#include <sys/stat.h>
41
42#include <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#include <stdlib.h>
51#include <string.h>
52#include <sysexits.h>
53#include <unistd.h>
54
55#include "mntopts.h"
56
57/*
58 * XXX - no way to specify "foo=<bar>"-type options; that's what we'd
59 * want for "-u", "-g", "-m", "-L", and "-W".
60 */
61static struct mntopt mopts[] = {
62	MOPT_STDOPTS,
63	MOPT_FORCE,
64	MOPT_SYNC,
65	MOPT_UPDATE,
66#ifdef MSDOSFSMNT_GEMDOSFS
67	{ "gemdosfs", 0, MSDOSFSMNT_GEMDOSFS, 1 },
68#endif
69	{ "shortnames", 0, MSDOSFSMNT_SHORTNAME, 1 },
70	{ "longnames", 0, MSDOSFSMNT_LONGNAME, 1 },
71	{ "nowin95", 0, MSDOSFSMNT_NOWIN95, 1 },
72	{ NULL }
73};
74
75static gid_t	a_gid __P((char *));
76static uid_t	a_uid __P((char *));
77static mode_t	a_mask __P((char *));
78static void	usage __P((void)) __dead2;
79static void     load_u2wtable __P((struct msdosfs_args *, char *));
80static void     load_ultable __P((struct msdosfs_args *, char *));
81
82int
83main(argc, argv)
84	int argc;
85	char **argv;
86{
87	struct msdosfs_args args;
88	struct stat sb;
89	int c, error, mntflags, set_gid, set_uid, set_mask;
90	char *dev, *dir, ndir[MAXPATHLEN+1];
91	struct vfsconf vfc;
92
93	mntflags = set_gid = set_uid = set_mask = 0;
94	(void)memset(&args, '\0', sizeof(args));
95	args.magic = MSDOSFS_ARGSMAGIC;
96
97	while ((c = getopt(argc, argv, "sl9u:g:m:o:L:W:")) != -1) {
98		switch (c) {
99#ifdef MSDOSFSMNT_GEMDOSFS
100		case 'G':
101			args.flags |= MSDOSFSMNT_GEMDOSFS;
102			break;
103#endif
104		case 's':
105			args.flags |= MSDOSFSMNT_SHORTNAME;
106			break;
107		case 'l':
108			args.flags |= MSDOSFSMNT_LONGNAME;
109			break;
110		case '9':
111			args.flags |= MSDOSFSMNT_NOWIN95;
112			break;
113		case 'u':
114			args.uid = a_uid(optarg);
115			set_uid = 1;
116			break;
117		case 'g':
118			args.gid = a_gid(optarg);
119			set_gid = 1;
120			break;
121		case 'm':
122			args.mask = a_mask(optarg);
123			set_mask = 1;
124			break;
125		case 'L':
126			load_ultable(&args, optarg);
127			args.flags |= MSDOSFSMNT_ULTABLE;
128			break;
129		case 'W':
130			load_u2wtable(&args, optarg);
131			args.flags |= MSDOSFSMNT_U2WTABLE;
132			break;
133		case 'o':
134			getmntopts(optarg, mopts, &mntflags, &args.flags);
135			break;
136		case '?':
137		default:
138			usage();
139			break;
140		}
141	}
142
143	if (optind + 2 != argc)
144		usage();
145
146	dev = argv[optind];
147	dir = argv[optind + 1];
148	if (dir[0] != '/') {
149		warnx("\"%s\" is a relative path", dir);
150		if (getcwd(ndir, sizeof(ndir)) == NULL)
151			err(EX_OSERR, "getcwd");
152		strncat(ndir, "/", sizeof(ndir) - strlen(ndir) - 1);
153		strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1);
154		dir = ndir;
155		warnx("using \"%s\" instead", dir);
156	}
157
158	args.fspec = dev;
159	args.export.ex_root = -2;	/* unchecked anyway on DOS fs */
160	if (mntflags & MNT_RDONLY)
161		args.export.ex_flags = MNT_EXRDONLY;
162	else
163		args.export.ex_flags = 0;
164	if (!set_gid || !set_uid || !set_mask) {
165		if (stat(dir, &sb) == -1)
166			err(EX_OSERR, "stat %s", dir);
167
168		if (!set_uid)
169			args.uid = sb.st_uid;
170		if (!set_gid)
171			args.gid = sb.st_gid;
172		if (!set_mask)
173			args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
174	}
175
176	error = getvfsbyname("msdos", &vfc);
177	if (error && vfsisloadable("msdos")) {
178		if (vfsload("msdos"))
179			err(EX_OSERR, "vfsload(msdos)");
180		endvfsent();	/* clear cache */
181		error = getvfsbyname("msdos", &vfc);
182	}
183	if (error)
184		errx(EX_OSERR, "msdos filesystem is not available");
185
186	if (mount(vfc.vfc_name, dir, mntflags, &args) < 0)
187		err(EX_OSERR, "%s", dev);
188
189	exit (0);
190}
191
192gid_t
193a_gid(s)
194	char *s;
195{
196	struct group *gr;
197	char *gname;
198	gid_t gid;
199
200	if ((gr = getgrnam(s)) != NULL)
201		gid = gr->gr_gid;
202	else {
203		for (gname = s; *s && isdigit(*s); ++s);
204		if (!*s)
205			gid = atoi(gname);
206		else
207			errx(EX_NOUSER, "unknown group id: %s", gname);
208	}
209	return (gid);
210}
211
212uid_t
213a_uid(s)
214	char *s;
215{
216	struct passwd *pw;
217	char *uname;
218	uid_t uid;
219
220	if ((pw = getpwnam(s)) != NULL)
221		uid = pw->pw_uid;
222	else {
223		for (uname = s; *s && isdigit(*s); ++s);
224		if (!*s)
225			uid = atoi(uname);
226		else
227			errx(EX_NOUSER, "unknown user id: %s", uname);
228	}
229	return (uid);
230}
231
232mode_t
233a_mask(s)
234	char *s;
235{
236	int done, rv;
237	char *ep;
238
239	done = 0;
240	rv = -1;
241	if (*s >= '0' && *s <= '7') {
242		done = 1;
243		rv = strtol(optarg, &ep, 8);
244	}
245	if (!done || rv < 0 || *ep)
246		errx(EX_USAGE, "invalid file mode: %s", s);
247	return (rv);
248}
249
250void
251usage()
252{
253	fprintf(stderr, "%s\n%s\n",
254	"usage: mount_msdos [-o options] [-u user] [-g group] [-m mask]",
255	"                   [-s] [-l] [-9] [-L locale] [-W table] bdev dir");
256	exit(EX_USAGE);
257}
258
259void
260load_u2wtable (pargs, name)
261	struct msdosfs_args *pargs;
262	char *name;
263{
264	FILE *f;
265	int i, code;
266	char buf[128];
267	char *fn;
268
269	if (*name == '/')
270		fn = name;
271	else {
272		snprintf(buf, sizeof(buf), "/usr/libdata/msdosfs/%s", name);
273		buf[127] = '\0';
274		fn = buf;
275	}
276	if ((f = fopen(fn, "r")) == NULL)
277		err(EX_NOINPUT, "%s", fn);
278	for (i = 0; i < 128; i++) {
279		if (fscanf(f, "%i", &code) != 1)
280			errx(EX_DATAERR, "u2w: missing item number %d", i);
281		pargs->u2w[i] = code;
282	}
283	for (i = 0; i < 128; i++) {
284		if (fscanf(f, "%i", &code) != 1)
285			errx(EX_DATAERR, "d2u: missing item number %d", i);
286		pargs->d2u[i] = code;
287	}
288	for (i = 0; i < 128; i++) {
289		if (fscanf(f, "%i", &code) != 1)
290			errx(EX_DATAERR, "u2d: missing item number %d", i);
291		pargs->u2d[i] = code;
292	}
293	fclose(f);
294}
295
296void
297load_ultable (pargs, name)
298	struct msdosfs_args *pargs;
299	char *name;
300{
301	int i;
302
303	if (setlocale(LC_CTYPE, name) == NULL)
304		err(EX_CONFIG, name);
305	for (i = 0; i < 128; i++) {
306		pargs->ul[i] = tolower(i | 0x80);
307		pargs->lu[i] = toupper(i | 0x80);
308	}
309}
310