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 <pwd.h>
48 #include <stdio.h>
49 /* must be after stdio to declare fparseln */
50 #include <libutil.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <sysexits.h>
54 #include <unistd.h>
55
56 #include "mntopts.h"
57
58 static gid_t a_gid(char *);
59 static uid_t a_uid(char *);
60 static mode_t a_mask(char *);
61 static void usage(void) __dead2;
62 static int set_charset(struct iovec **iov, int *iovlen, const char *, const char *);
63
64 int
main(int argc,char ** argv)65 main(int argc, char **argv)
66 {
67 struct iovec *iov = NULL;
68 int iovlen = 0;
69 struct stat sb;
70 int c, set_gid, set_uid, set_mask, set_dirmask;
71 char *dev, *dir, mntpath[MAXPATHLEN], *csp;
72 char fstype[] = "msdosfs";
73 char errmsg[255] = {0};
74 char *cs_dos = NULL;
75 char *cs_local = NULL;
76 mode_t mask = 0, dirmask = 0;
77 uid_t uid = 0;
78 gid_t gid = 0;
79
80 set_gid = set_uid = set_mask = set_dirmask = 0;
81
82 while ((c = getopt(argc, argv, "sl9u:g:m:M:o:L:D:W:")) != -1) {
83 switch (c) {
84 case 's':
85 build_iovec(&iov, &iovlen, "shortnames", NULL, (size_t)-1);
86 break;
87 case 'l':
88 build_iovec(&iov, &iovlen, "longnames", NULL, (size_t)-1);
89 break;
90 case '9':
91 build_iovec_argf(&iov, &iovlen, "nowin95", "", (size_t)-1);
92 break;
93 case 'u':
94 uid = a_uid(optarg);
95 set_uid = 1;
96 break;
97 case 'g':
98 gid = a_gid(optarg);
99 set_gid = 1;
100 break;
101 case 'm':
102 mask = a_mask(optarg);
103 set_mask = 1;
104 break;
105 case 'M':
106 dirmask = a_mask(optarg);
107 set_dirmask = 1;
108 break;
109 case 'L': {
110 const char *quirk = NULL;
111 if (setlocale(LC_CTYPE, optarg) == NULL)
112 err(EX_CONFIG, "%s", optarg);
113 csp = strchr(optarg,'.');
114 if (!csp)
115 err(EX_CONFIG, "%s", optarg);
116 quirk = kiconv_quirkcs(csp + 1, KICONV_VENDOR_MICSFT);
117 build_iovec_argf(&iov, &iovlen, "cs_local", quirk);
118 cs_local = strdup(quirk);
119 }
120 break;
121 case 'D':
122 cs_dos = strdup(optarg);
123 build_iovec_argf(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
124 break;
125 case 'o': {
126 char *p = NULL;
127 char *val = strdup("");
128 p = strchr(optarg, '=');
129 if (p != NULL) {
130 free(val);
131 *p = '\0';
132 val = p + 1;
133 }
134 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
135 }
136 break;
137 case 'W':
138 if (strcmp(optarg, "iso22dos") == 0) {
139 cs_local = strdup("ISO8859-2");
140 cs_dos = strdup("CP852");
141 } else if (strcmp(optarg, "iso72dos") == 0) {
142 cs_local = strdup("ISO8859-7");
143 cs_dos = strdup("CP737");
144 } else if (strcmp(optarg, "koi2dos") == 0) {
145 cs_local = strdup("KOI8-R");
146 cs_dos = strdup("CP866");
147 } else if (strcmp(optarg, "koi8u2dos") == 0) {
148 cs_local = strdup("KOI8-U");
149 cs_dos = strdup("CP866");
150 } else {
151 err(EX_NOINPUT, "%s", optarg);
152 }
153 build_iovec(&iov, &iovlen, "cs_local", cs_local, (size_t)-1);
154 build_iovec(&iov, &iovlen, "cs_dos", cs_dos, (size_t)-1);
155 break;
156 case '?':
157 default:
158 usage();
159 break;
160 }
161 }
162
163 if (optind + 2 != argc)
164 usage();
165
166 if (set_mask && !set_dirmask) {
167 dirmask = mask;
168 set_dirmask = 1;
169 }
170 else if (set_dirmask && !set_mask) {
171 mask = dirmask;
172 set_mask = 1;
173 }
174
175 dev = argv[optind];
176 dir = argv[optind + 1];
177
178 if (cs_local != NULL) {
179 if (set_charset(&iov, &iovlen, cs_local, cs_dos) == -1)
180 err(EX_OSERR, "msdosfs_iconv");
181 build_iovec_argf(&iov, &iovlen, "kiconv", "");
182 } else if (cs_dos != NULL) {
183 build_iovec_argf(&iov, &iovlen, "cs_local", "ISO8859-1");
184 if (set_charset(&iov, &iovlen, "ISO8859-1", cs_dos) == -1)
185 err(EX_OSERR, "msdosfs_iconv");
186 build_iovec_argf(&iov, &iovlen, "kiconv", "");
187 }
188
189 /*
190 * Resolve the mountpoint with realpath(3) and remove unnecessary
191 * slashes from the devicename if there are any.
192 */
193 if (checkpath(dir, mntpath) != 0)
194 err(EX_USAGE, "%s", mntpath);
195 (void)rmslashes(dev, dev);
196
197 if (!set_gid || !set_uid || !set_mask) {
198 if (stat(mntpath, &sb) == -1)
199 err(EX_OSERR, "stat %s", mntpath);
200
201 if (!set_uid)
202 uid = sb.st_uid;
203 if (!set_gid)
204 gid = sb.st_gid;
205 if (!set_mask)
206 mask = dirmask =
207 sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
208 }
209
210 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
211 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
212 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
213 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
214 build_iovec_argf(&iov, &iovlen, "uid", "%d", uid);
215 build_iovec_argf(&iov, &iovlen, "gid", "%u", gid);
216 build_iovec_argf(&iov, &iovlen, "mask", "%u", mask);
217 build_iovec_argf(&iov, &iovlen, "dirmask", "%u", dirmask);
218
219 if (nmount(iov, iovlen, 0) < 0) {
220 if (errmsg[0])
221 err(1, "%s: %s", dev, errmsg);
222 else
223 err(1, "%s", dev);
224 }
225
226 exit (0);
227 }
228
229 gid_t
a_gid(char * s)230 a_gid(char *s)
231 {
232 struct group *gr;
233 char *gname;
234 gid_t gid;
235
236 if ((gr = getgrnam(s)) != NULL)
237 gid = gr->gr_gid;
238 else {
239 for (gname = s; *s && isdigit(*s); ++s);
240 if (!*s)
241 gid = atoi(gname);
242 else
243 errx(EX_NOUSER, "unknown group id: %s", gname);
244 }
245 return (gid);
246 }
247
248 uid_t
a_uid(char * s)249 a_uid(char *s)
250 {
251 struct passwd *pw;
252 char *uname;
253 uid_t uid;
254
255 if ((pw = getpwnam(s)) != NULL)
256 uid = pw->pw_uid;
257 else {
258 for (uname = s; *s && isdigit(*s); ++s);
259 if (!*s)
260 uid = atoi(uname);
261 else
262 errx(EX_NOUSER, "unknown user id: %s", uname);
263 }
264 return (uid);
265 }
266
267 mode_t
a_mask(char * s)268 a_mask(char *s)
269 {
270 int done, rv;
271 char *ep;
272
273 done = 0;
274 rv = -1;
275 if (*s >= '0' && *s <= '7') {
276 done = 1;
277 rv = strtol(optarg, &ep, 8);
278 }
279 if (!done || rv < 0 || *ep)
280 errx(EX_USAGE, "invalid file mode: %s", s);
281 return (rv);
282 }
283
284 void
usage(void)285 usage(void)
286 {
287 fprintf(stderr, "%s\n%s\n%s\n",
288 "usage: mount_msdosfs [-9ls] [-D DOS_codepage] [-g gid] [-L locale]",
289 " [-M mask] [-m mask] [-o options] [-u uid]",
290 " [-W table] special node");
291 exit(EX_USAGE);
292 }
293
294 int
set_charset(struct iovec ** iov,int * iovlen,const char * cs_local,const char * cs_dos)295 set_charset(struct iovec **iov, int *iovlen, const char *cs_local, const char *cs_dos)
296 {
297 int error;
298
299 if (modfind("msdosfs_iconv") < 0)
300 if (kldload("msdosfs_iconv") < 0 || modfind("msdosfs_iconv") < 0) {
301 warnx("cannot find or load \"msdosfs_iconv\" kernel module");
302 return (-1);
303 }
304
305 build_iovec_argf(iov, iovlen, "cs_win", ENCODING_UNICODE);
306 error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local);
307 if (error && errno != EEXIST)
308 return (-1);
309 if (cs_dos != NULL) {
310 error = kiconv_add_xlat16_cspairs(cs_dos, cs_local);
311 if (error && errno != EEXIST)
312 return (-1);
313 } else {
314 build_iovec_argf(iov, iovlen, "cs_dos", cs_local);
315 error = kiconv_add_xlat16_cspair(cs_local, cs_local,
316 KICONV_FROM_UPPER | KICONV_LOWER);
317 if (error && errno != EEXIST)
318 return (-1);
319 }
320
321 return (0);
322 }
323