1 /* $NetBSD: mount_msdos.c,v 1.18 1997/09/16 12:24:18 lukem Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-4-Clause
5 *
6 * Copyright (c) 1994 Christopher G. Demetriou
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Christopher G. Demetriou.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <sys/param.h>
36 #include <sys/mount.h>
37 #include <sys/stat.h>
38 #include <sys/iconv.h>
39 #include <sys/linker.h>
40 #include <sys/module.h>
41
42 #include <ctype.h>
43 #include <err.h>
44 #include <errno.h>
45 #include <grp.h>
46 #include <locale.h>
47 #include <mntopts.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 static gid_t a_gid(char *);
58 static uid_t a_uid(char *);
59 static mode_t a_mask(char *);
60 static void usage(void) __dead2;
61 static int set_charset(struct iovec **iov, int *iovlen, const char *, const char *);
62
63 int
main(int argc,char ** argv)64 main(int argc, char **argv)
65 {
66 struct iovec *iov = NULL;
67 int iovlen = 0;
68 struct stat sb;
69 int c, set_gid, set_uid, set_mask, set_dirmask;
70 char *dev, *dir, mntpath[MAXPATHLEN], *csp;
71 char fstype[] = "msdosfs";
72 char errmsg[255] = {0};
73 char *cs_dos = NULL;
74 char *cs_local = NULL;
75 mode_t mask = 0, dirmask = 0;
76 uid_t uid = 0;
77 gid_t gid = 0;
78
79 set_gid = set_uid = set_mask = set_dirmask = 0;
80
81 while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:W:")) != -1) {
82 switch (c) {
83 case 's':
84 build_iovec(&iov, &iovlen, "shortnames", NULL, (size_t)-1);
85 break;
86 case 'l':
87 build_iovec(&iov, &iovlen, "longnames", NULL, (size_t)-1);
88 break;
89 case '9':
90 build_iovec_argf(&iov, &iovlen, "nowin95", "", (size_t)-1);
91 break;
92 case 'u':
93 uid = a_uid(optarg);
94 set_uid = 1;
95 break;
96 case 'g':
97 gid = a_gid(optarg);
98 set_gid = 1;
99 break;
100 case 'm':
101 mask = a_mask(optarg);
102 set_mask = 1;
103 break;
104 case 'M':
105 dirmask = a_mask(optarg);
106 set_dirmask = 1;
107 break;
108 case 'L': {
109 const char *quirk = NULL;
110 if (setlocale(LC_CTYPE, optarg) == NULL)
111 err(EX_CONFIG, "%s", optarg);
112 csp = strchr(optarg,'.');
113 if (!csp)
114 err(EX_CONFIG, "%s", optarg);
115 quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT);
116 build_iovec_argf(&iov, &iovlen, "cs_local", quirk);
117 cs_local = strdup(quirk);
118 }
119 break;
120 case 'D':
121 cs_dos = strdup(optarg);
122 build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
123 break;
124 case 'o': {
125 char *p = NULL;
126 char *val = strdup("");
127 p = strchr(optarg, '=');
128 if (p != NULL) {
129 free(val);
130 *p = '\0';
131 val = p + 1;
132 }
133 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
134 }
135 break;
136 case 'W':
137 if (strcmp(optarg, "iso22dos") == 0) {
138 cs_local = strdup("ISO8859-2");
139 cs_dos = strdup("CP852");
140 } else if (strcmp(optarg, "iso72dos") == 0) {
141 cs_local = strdup("ISO8859-7");
142 cs_dos = strdup("CP737");
143 } else if (strcmp(optarg, "koi2dos") == 0) {
144 cs_local = strdup("KOI8-R");
145 cs_dos = strdup("CP866");
146 } else if (strcmp(optarg, "koi8u2dos") == 0) {
147 cs_local = strdup("KOI8-U");
148 cs_dos = strdup("CP866");
149 } else {
150 err(EX_NOINPUT, "%s", optarg);
151 }
152 build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1);
153 build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
154 break;
155 case '?':
156 default:
157 usage();
158 break;
159 }
160 }
161
162 if (optind + 2 != argc)
163 usage();
164
165 if (set_mask && !set_dirmask) {
166 dirmask = mask;
167 set_dirmask = 1;
168 }
169 else if (set_dirmask && !set_mask) {
170 mask = dirmask;
171 set_mask = 1;
172 }
173
174 dev = argv[optind];
175 dir = argv[optind + 1];
176
177 if (cs_local != NULL) {
178 if (set_charset(&iov, &iovlen, cs_local, cs_dos) == -1)
179 err(EX_OSERR, "msdosfs_iconv");
180 build_iovec_argf(&iov, &iovlen, "kiconv", "");
181 } else if (cs_dos != NULL) {
182 build_iovec_argf(&iov, &iovlen, "cs_local", "ISO8859-1");
183 if (set_charset(&iov, &iovlen, "ISO8859-1", cs_dos) == -1)
184 err(EX_OSERR, "msdosfs_iconv");
185 build_iovec_argf(&iov, &iovlen, "kiconv", "");
186 }
187
188 /*
189 * Resolve the mountpoint with realpath(3) and remove unnecessary
190 * slashes from the devicename if there are any.
191 */
192 if (checkpath(dir, mntpath) != 0)
193 err(EX_USAGE, "%s", mntpath);
194 (void)rmslashes(dev, dev);
195
196 if (!set_gid || !set_uid || !set_mask) {
197 if (stat(mntpath, &sb) == -1)
198 err(EX_OSERR, "stat %s", mntpath);
199
200 if (!set_uid)
201 uid = sb.st_uid;
202 if (!set_gid)
203 gid = sb.st_gid;
204 if (!set_mask)
205 mask = dirmask =
206 sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
207 }
208
209 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
210 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
211 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
212 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
213 build_iovec_argf(&iov, &iovlen, "uid", "%d", uid);
214 build_iovec_argf(&iov, &iovlen, "gid", "%u", gid);
215 build_iovec_argf(&iov, &iovlen, "mask", "%u", mask);
216 build_iovec_argf(&iov, &iovlen, "dirmask", "%u", dirmask);
217
218 if (nmount(iov, iovlen, 0) < 0) {
219 if (errmsg[0])
220 err(1, "%s: %s", dev, errmsg);
221 else
222 err(1, "%s", dev);
223 }
224
225 exit (0);
226 }
227
228 gid_t
a_gid(char * s)229 a_gid(char *s)
230 {
231 struct group *gr;
232 char *gname;
233 gid_t gid;
234
235 if ((gr = getgrnam(s)) != NULL)
236 gid = gr->gr_gid;
237 else {
238 for (gname = s; *s && isdigit(*s); ++s);
239 if (!*s)
240 gid = atoi(gname);
241 else
242 errx(EX_NOUSER, "unknown group id: %s", gname);
243 }
244 return (gid);
245 }
246
247 uid_t
a_uid(char * s)248 a_uid(char *s)
249 {
250 struct passwd *pw;
251 char *uname;
252 uid_t uid;
253
254 if ((pw = getpwnam(s)) != NULL)
255 uid = pw->pw_uid;
256 else {
257 for (uname = s; *s && isdigit(*s); ++s);
258 if (!*s)
259 uid = atoi(uname);
260 else
261 errx(EX_NOUSER, "unknown user id: %s", uname);
262 }
263 return (uid);
264 }
265
266 mode_t
a_mask(char * s)267 a_mask(char *s)
268 {
269 int done, rv;
270 char *ep;
271
272 done = 0;
273 rv = -1;
274 if (*s >= '0' && *s <= '7') {
275 done = 1;
276 rv = strtol(optarg, &ep, 8);
277 }
278 if (!done || rv < 0 || *ep)
279 errx(EX_USAGE, "invalid file mode: %s", s);
280 return (rv);
281 }
282
283 void
usage(void)284 usage(void)
285 {
286 fprintf(stderr, "%s\n%s\n%s\n",
287 "usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]",
288 " [-M mask] [-m mask] [-o options] [-u uid]",
289 " [-W table] special node");
290 exit(EX_USAGE);
291 }
292
293 int
set_charset(struct iovec ** iov,int * iovlen,const char * cs_local,const char * cs_dos)294 set_charset(struct iovec **iov, int *iovlen, const char *cs_local, const char *cs_dos)
295 {
296 int error;
297
298 if (modfind("msdosfs_iconv") < 0)
299 if (kldload("msdosfs_iconv") < 0 || modfind("msdosfs_iconv") < 0) {
300 warnx("cannot find or load \"msdosfs_iconv\" kernel module");
301 return (-1);
302 }
303
304 build_iovec_argf(iov, iovlen, "cs_win", ENCODING_UNICODE);
305 error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local);
306 if (error && errno != EEXIST)
307 return (-1);
308 if (cs_dos != NULL) {
309 error = kiconv_add_xlat16_cspairs(cs_dos, cs_local);
310 if (error && errno != EEXIST)
311 return (-1);
312 } else {
313 build_iovec_argf(iov, iovlen, "cs_dos", cs_local);
314 error = kiconv_add_xlat16_cspair(cs_local, cs_local,
315 KICONV_FROM_UPPER | KICONV_LOWER);
316 if (error && errno != EEXIST)
317 return (-1);
318 }
319
320 return (0);
321 }
322