mount_msdosfs.c revision 33749 
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 1.11 1998/02/18 09:30:31 jkh 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 <pwd.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <string.h>
51#include <sysexits.h>
52#include <unistd.h>
53
54#include "mntopts.h"
55
56static struct mntopt mopts[] = {
57	MOPT_STDOPTS,
58	MOPT_FORCE,
59	MOPT_SYNC,
60	MOPT_UPDATE,
61	{ NULL }
62};
63
64static gid_t	a_gid __P((char *));
65static uid_t	a_uid __P((char *));
66static mode_t	a_mask __P((char *));
67static void	usage __P((void)) __dead2;
68static void     load_u2wtable __P((u_int16_t *, char *));
69
70int
71main(argc, argv)
72	int argc;
73	char **argv;
74{
75	struct msdosfs_args args;
76	struct stat sb;
77	int c, error, mntflags, set_gid, set_uid, set_mask;
78	char *dev, *dir, ndir[MAXPATHLEN+1];
79	struct vfsconf vfc;
80
81	mntflags = set_gid = set_uid = set_mask = 0;
82	(void)memset(&args, '\0', sizeof(args));
83	args.magic = MSDOSFS_ARGSMAGIC;
84
85	while ((c = getopt(argc, argv, "sl9u:g:m:o:w:")) != -1) {
86		switch (c) {
87#ifdef MSDOSFSMNT_GEMDOSFS
88		case 'G':
89			args.flags |= MSDOSFSMNT_GEMDOSFS;
90			break;
91#endif
92		case 's':
93			args.flags |= MSDOSFSMNT_SHORTNAME;
94			break;
95		case 'l':
96			args.flags |= MSDOSFSMNT_LONGNAME;
97			break;
98		case '9':
99			args.flags |= MSDOSFSMNT_NOWIN95;
100			break;
101		case 'u':
102			args.uid = a_uid(optarg);
103			set_uid = 1;
104			break;
105		case 'g':
106			args.gid = a_gid(optarg);
107			set_gid = 1;
108			break;
109		case 'm':
110			args.mask = a_mask(optarg);
111			set_mask = 1;
112			break;
113		case 'w':
114			load_u2wtable(args.u2w, optarg);
115			args.flags |= MSDOSFSMNT_U2WTABLE;
116			break;
117		case 'o':
118			getmntopts(optarg, mopts, &mntflags, 0);
119			break;
120		case '?':
121		default:
122			usage();
123			break;
124		}
125	}
126
127	if (optind + 2 != argc)
128		usage();
129
130	dev = argv[optind];
131	dir = argv[optind + 1];
132	if (dir[0] != '/') {
133		warnx("\"%s\" is a relative path", dir);
134		if (getcwd(ndir, sizeof(ndir)) == NULL)
135			err(EX_OSERR, "getcwd");
136		strncat(ndir, "/", sizeof(ndir) - strlen(ndir) - 1);
137		strncat(ndir, dir, sizeof(ndir) - strlen(ndir) - 1);
138		dir = ndir;
139		warnx("using \"%s\" instead", dir);
140	}
141
142	args.fspec = dev;
143	args.export.ex_root = -2;	/* unchecked anyway on DOS fs */
144	if (mntflags & MNT_RDONLY)
145		args.export.ex_flags = MNT_EXRDONLY;
146	else
147		args.export.ex_flags = 0;
148	if (!set_gid || !set_uid || !set_mask) {
149		if (stat(dir, &sb) == -1)
150			err(EX_OSERR, "stat %s", dir);
151
152		if (!set_uid)
153			args.uid = sb.st_uid;
154		if (!set_gid)
155			args.gid = sb.st_gid;
156		if (!set_mask)
157			args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
158	}
159
160	error = getvfsbyname("msdos", &vfc);
161	if (error && vfsisloadable("msdos")) {
162		if (vfsload("msdos"))
163			err(EX_OSERR, "vfsload(msdos)");
164		endvfsent();	/* clear cache */
165		error = getvfsbyname("msdos", &vfc);
166	}
167	if (error)
168		errx(EX_OSERR, "msdos filesystem is not available");
169
170	if (mount(vfc.vfc_name, dir, mntflags, &args) < 0)
171		err(EX_OSERR, "%s", dev);
172
173	exit (0);
174}
175
176gid_t
177a_gid(s)
178	char *s;
179{
180	struct group *gr;
181	char *gname;
182	gid_t gid;
183
184	if ((gr = getgrnam(s)) != NULL)
185		gid = gr->gr_gid;
186	else {
187		for (gname = s; *s && isdigit(*s); ++s);
188		if (!*s)
189			gid = atoi(gname);
190		else
191			errx(EX_NOUSER, "unknown group id: %s", gname);
192	}
193	return (gid);
194}
195
196uid_t
197a_uid(s)
198	char *s;
199{
200	struct passwd *pw;
201	char *uname;
202	uid_t uid;
203
204	if ((pw = getpwnam(s)) != NULL)
205		uid = pw->pw_uid;
206	else {
207		for (uname = s; *s && isdigit(*s); ++s);
208		if (!*s)
209			uid = atoi(uname);
210		else
211			errx(EX_NOUSER, "unknown user id: %s", uname);
212	}
213	return (uid);
214}
215
216mode_t
217a_mask(s)
218	char *s;
219{
220	int done, rv;
221	char *ep;
222
223	done = 0;
224	rv = -1;
225	if (*s >= '0' && *s <= '7') {
226		done = 1;
227		rv = strtol(optarg, &ep, 8);
228	}
229	if (!done || rv < 0 || *ep)
230		errx(EX_USAGE, "invalid file mode: %s", s);
231	return (rv);
232}
233
234void
235usage()
236{
237	fprintf(stderr, "usage: mount_msdos [-o options] [-u user] [-g group] [-m mask] [-s] [-l] [-9] [-w table] bdev dir\n");
238	exit(EX_USAGE);
239}
240
241void
242load_u2wtable (table, name)
243	u_int16_t *table;
244	char *name;
245{
246	FILE *f;
247	int i, code;
248	char buf[128];
249	char *fn;
250
251	if (*name == '/')
252		fn = name;
253	else {
254		snprintf(buf, sizeof(buf), "/usr/libdata/msdosfs/%s", name);
255		buf[127] = '\0';
256		fn = buf;
257	}
258	if ((f = fopen(fn, "r")) == NULL)
259		err(EX_NOINPUT, "%s", fn);
260	for (i = 0; i < 128; i++) {
261		if (fscanf(f, "%i", &code) != 1)
262			errx(EX_DATAERR, "missing item number %d", i);
263		table[i] = code;
264	}
265	fclose(f);
266}
267