2 /* $NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $ */
5 * Copyright (C) 1995, 1997 Wolfgang Solfrank.
6 * Copyright (C) 1995, 1997 TooLs GmbH.
8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by TooLs GmbH.
21 * 4. The name of TooLs GmbH may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 * Written by Paul Popelka (paulp@uts.amdahl.com)
38 * You can do anything you want with this software, just don't say you wrote
39 * it, and don't remove this notice.
41 * This software is provided "as is".
43 * The author supplies this software to be publicly redistributed on the
44 * understanding that the author is not responsible for the correct
45 * functioning of this software in any circumstances and is not liable for
46 * any damages caused by this software.
52 * System include files.
54 #include <sys/param.h>
55 #include <sys/clock.h>
56 #include <sys/kernel.h> /* defines tz */
57 #include <sys/systm.h>
58 #include <sys/dirent.h>
59 #include <sys/iconv.h>
60 #include <sys/mount.h>
61 #include <sys/malloc.h>
63 extern struct iconv_functions *msdosfs_iconv;
66 * MSDOSFS include files.
68 #include <fs/msdosfs/bpb.h>
69 #include <fs/msdosfs/msdosfsmount.h>
70 #include <fs/msdosfs/direntry.h>
72 static int mbsadjpos(const char **, size_t, size_t, int, int, void *handle);
73 static u_int16_t dos2unixchr(const u_char **, size_t *, int, struct msdosfsmount *);
74 static u_int16_t unix2doschr(const u_char **, size_t *, struct msdosfsmount *);
75 static u_int16_t win2unixchr(u_int16_t, struct msdosfsmount *);
76 static u_int16_t unix2winchr(const u_char **, size_t *, int, struct msdosfsmount *);
78 static char *nambuf_ptr;
79 static size_t nambuf_len;
80 static int nambuf_last_id;
83 * 0 - character disallowed in long file name.
84 * 1 - character should be replaced by '_' in DOS file name,
85 * and generation number inserted.
86 * 2 - character ('.' and ' ') should be skipped in DOS file name,
87 * and generation number inserted.
91 /* iso8859-1 -> cp850 */
92 0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */
93 0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */
94 0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */
95 0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */
96 2, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
97 0x28, 0x29, 0, 1, 1, 0x2d, 2, 0, /* 28-2f */
98 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
99 0x38, 0x39, 0, 1, 0, 1, 0, 0, /* 38-3f */
100 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
101 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
102 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
103 0x58, 0x59, 0x5a, 1, 0, 1, 0x5e, 0x5f, /* 58-5f */
104 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */
105 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */
106 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */
107 0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */
108 0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */
109 0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */
110 0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */
111 0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */
112 0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */
113 0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */
114 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */
115 0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */
116 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */
117 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */
118 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */
119 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */
120 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */
121 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */
122 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */
123 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */
128 /* cp850 -> iso8859-1 */
129 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */
130 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */
131 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */
132 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */
133 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
134 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
135 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
136 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
137 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
138 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
139 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
140 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
141 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
142 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
143 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
144 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
145 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */
146 0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */
147 0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */
148 0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */
149 0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */
150 0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */
151 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */
152 0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */
153 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */
154 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */
155 0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */
156 0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */
157 0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */
158 0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */
159 0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */
160 0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */
166 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
167 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
168 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
169 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
170 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
171 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
172 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
173 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
174 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
175 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
176 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
177 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
178 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
179 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
180 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
181 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
182 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
183 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
184 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
185 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
186 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
187 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
188 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
189 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
190 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
191 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
192 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
193 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
194 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
195 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
196 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
197 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
203 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
204 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
205 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
206 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
207 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
208 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
209 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
210 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
211 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
212 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
213 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
214 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
215 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
216 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
217 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
218 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
219 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
220 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
221 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
222 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
223 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
224 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
225 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
226 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
227 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
228 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
229 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
230 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
231 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
232 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
233 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
234 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
238 * DOS filenames are made of 2 parts, the name part and the extension part.
239 * The name part is 8 characters long and the extension part is 3
240 * characters long. They may contain trailing blanks if the name or
241 * extension are not long enough to fill their respective fields.
245 * Convert a DOS filename to a unix filename. And, return the number of
246 * characters in the resulting unix filename excluding the terminating
250 dos2unixfn(dn, un, lower, pmp)
254 struct msdosfsmount *pmp;
261 * If first char of the filename is SLOT_E5 (0x05), then the real
262 * first char of the filename should be 0xe5. But, they couldn't
263 * just have a 0xe5 mean 0xe5 because that is used to mean a freed
264 * directory slot. Another dos quirk.
270 * Copy the name portion into the unix filename string.
272 for (i = 8; i > 0 && *dn != ' ';) {
273 c = dos2unixchr((const u_char **)&dn, &i, lower & LCASE_BASE,
285 * Now, if there is an extension then put in a period and copy in
291 for (i = 3; i > 0 && *dn != ' ';) {
292 c = dos2unixchr((const u_char **)&dn, &i,
293 lower & LCASE_EXT, pmp);
308 * Convert a unix filename to a DOS filename according to Win95 rules.
309 * If applicable and gen is not 0, it is inserted into the converted
310 * filename as a generation number.
312 * 0 if name couldn't be converted
313 * 1 if the converted name is the same as the original
314 * (no long filename entry necessary for Win95)
315 * 2 if conversion was successful
316 * 3 if conversion was successful and generation number was inserted
319 unix2dosfn(un, dn, unlen, gen, pmp)
324 struct msdosfsmount *pmp;
329 const u_char *cp, *dp, *dp1;
330 u_char gentext[6], *wcp;
334 * Fill the dos filename string with blanks. These are DOS's pad
337 for (i = 0; i < 11; i++)
342 * The filenames "." and ".." are handled specially, since they
343 * don't follow dos filename rules.
345 if (un[0] == '.' && unlen == 1) {
349 if (un[0] == '.' && un[1] == '.' && unlen == 2) {
356 * Filenames with only blanks and dots are not allowed!
358 for (cp = un, i = unlen; --i >= 0; cp++)
359 if (*cp != ' ' && *cp != '.')
366 * Filenames with some characters are not allowed!
368 for (cp = un, i = unlen; i > 0;)
369 if (unix2doschr(&cp, (size_t *)&i, pmp) == 0)
373 * Now find the extension
374 * Note: dot as first char doesn't start extension
375 * and trailing dots and blanks are ignored
376 * Note(2003/7): It seems recent Windows has
377 * defferent rule than this code, that Windows
378 * ignores all dots before extension, and use all
379 * chars as filename except for dots.
382 for (cp = un + 1, i = unlen - 1; --i >= 0;) {
399 * Now convert it (this part is for extension).
400 * As Windows XP do, if it's not ascii char,
401 * this function should return 2 or 3, so that checkng out Unicode name.
407 l = unlen - (dp - un);
408 for (cp = dp, i = l, j = 8; i > 0 && j < 11; j++) {
409 c = unix2doschr(&cp, (size_t *)&i, pmp);
425 if (((dn[j] & 0x80) || *(cp - 1) != dn[j]) && conv != 3)
440 for (dp = cp; *--dp == ' ' || *dp == '.';);
445 * Now convert the rest of the name
447 for (i = dp - un, j = 0; un < dp && j < 8; j++) {
448 c = unix2doschr(&un, &i, pmp);
464 if (((dn[j] & 0x80) || *(un - 1) != dn[j]) && conv != 3)
478 * If we didn't have any chars in filename,
485 * If there wasn't any char dropped,
486 * there is no place for generation numbers
495 * Now insert the generation number into the filename part
499 for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
500 *--wcp = gen % 10 + '0';
505 for (i = 8; dn[--i] == ' ';);
507 if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
508 i = 8 - (gentext + sizeof(gentext) - wcp + 1);
510 * Correct posision to where insert the generation number
513 i -= mbsadjpos((const char**)&cp, i, unlen, 1, pmp->pm_flags, pmp->pm_d2u);
516 while (wcp < gentext + sizeof(gentext))
520 * Tail of the filename should be space
528 * The first character cannot be E5,
529 * because that means a deleted entry
538 * Create a Win95 long name directory entry
539 * Note: assumes that the filename is valid,
540 * i.e. doesn't consist solely of blanks and dots
543 unix2winfn(un, unlen, wep, cnt, chksum, pmp)
546 struct winentry *wep;
549 struct msdosfsmount *pmp;
556 * Drop trailing blanks and dots
558 unlen = winLenFixup(un, unlen);
561 * Cut *un for this slot
563 unlen = mbsadjpos((const char **)&un, unlen, (cnt - 1) * WIN_CHARS, 2,
564 pmp->pm_flags, pmp->pm_u2w);
567 * Initialize winentry to some useful default
569 for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff);
571 wep->weAttributes = ATTR_WIN95;
572 wep->weReserved1 = 0;
573 wep->weChksum = chksum;
574 wep->weReserved2 = 0;
577 * Now convert the filename parts
580 for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0 && !end;) {
581 code = unix2winchr(&un, &unlen, 0, pmp);
587 for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0 && !end;) {
588 code = unix2winchr(&un, &unlen, 0, pmp);
594 for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0 && !end;) {
595 code = unix2winchr(&un, &unlen, 0, pmp);
608 * Compare our filename to the one in the Win95 entry
609 * Returns the checksum or -1 if no match
612 winChkName(un, unlen, chksum, pmp)
616 struct msdosfsmount *pmp;
621 struct dirent dirbuf;
624 * We alread have winentry in mbnambuf
626 if (!mbnambuf_flush(&dirbuf) || !dirbuf.d_namlen)
630 printf("winChkName(): un=%s:%d,d_name=%s:%d\n", un, unlen,
636 * Compare the name parts
638 len = dirbuf.d_namlen;
642 for (np = dirbuf.d_name; unlen > 0 && len > 0;) {
644 * Comparison must be case insensitive, because FAT disallows
645 * to look up or create files in case sensitive even when
646 * it's a long file name.
648 c1 = unix2winchr((const u_char **)&np, &len, LCASE_BASE, pmp);
649 c2 = unix2winchr(&un, &unlen, LCASE_BASE, pmp);
657 * Convert Win95 filename to dirbuf.
658 * Returns the checksum or -1 if impossible
661 win2unixfn(wep, chksum, pmp)
662 struct winentry *wep;
664 struct msdosfsmount *pmp;
667 u_int8_t *np, name[WIN_CHARS * 2 + 1];
671 if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
672 || !(wep->weCnt&WIN_CNT))
676 * First compare checksums
678 if (wep->weCnt&WIN_LAST) {
679 chksum = wep->weChksum;
680 } else if (chksum != wep->weChksum)
686 * Convert the name parts
689 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
690 code = (cp[1] << 8) | cp[0];
694 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1);
700 code = win2unixchr(code, pmp);
708 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
709 code = (cp[1] << 8) | cp[0];
713 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1);
719 code = win2unixchr(code, pmp);
727 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
728 code = (cp[1] << 8) | cp[0];
732 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1);
738 code = win2unixchr(code, pmp);
747 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1);
752 * Compute the unrolled checksum of a DOS filename for Win95 LFN use.
755 winChksum(struct direntry *dep)
760 s = ((s << 7) | (s >> 1)) + dep->deName[1];
761 s = ((s << 7) | (s >> 1)) + dep->deName[2];
762 s = ((s << 7) | (s >> 1)) + dep->deName[3];
763 s = ((s << 7) | (s >> 1)) + dep->deName[4];
764 s = ((s << 7) | (s >> 1)) + dep->deName[5];
765 s = ((s << 7) | (s >> 1)) + dep->deName[6];
766 s = ((s << 7) | (s >> 1)) + dep->deName[7];
767 s = ((s << 7) | (s >> 1)) + dep->deExtension[0];
768 s = ((s << 7) | (s >> 1)) + dep->deExtension[1];
769 s = ((s << 7) | (s >> 1)) + dep->deExtension[2];
775 * Determine the number of slots necessary for Win95 names
778 winSlotCnt(un, unlen, pmp)
781 struct msdosfsmount *pmp;
784 char wn[WIN_MAXLEN * 2 + 1], *wnp;
786 unlen = winLenFixup(un, unlen);
788 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
789 wlen = WIN_MAXLEN * 2;
791 msdosfs_iconv->conv(pmp->pm_u2w, (const char **)&un, &unlen, &wnp, &wlen);
794 return howmany(WIN_MAXLEN - wlen/2, WIN_CHARS);
797 if (unlen > WIN_MAXLEN)
799 return howmany(unlen, WIN_CHARS);
803 * Determine the number of bytes neccesary for Win95 names
806 winLenFixup(un, unlen)
810 for (un += unlen; unlen > 0; unlen--)
811 if (*--un != ' ' && *un != '.')
817 * Store an area with multi byte string instr, and reterns left
818 * byte of instr and moves pointer forward. The area's size is
822 mbsadjpos(const char **instr, size_t inlen, size_t outlen, int weight, int flag, void *handle)
824 char *outp, outstr[outlen * weight + 1];
826 if (flag & MSDOSFSMNT_KICONV && msdosfs_iconv) {
829 msdosfs_iconv->conv(handle, instr, &inlen, &outp, &outlen);
833 (*instr) += min(inlen, outlen);
834 return (inlen - min(inlen, outlen));
838 * Convert DOS char to Local char
841 dos2unixchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
844 char *outp, outbuf[3];
848 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
852 if (lower & (LCASE_BASE | LCASE_EXT))
853 msdosfs_iconv->convchr_case(pmp->pm_d2u, (const char **)instr,
854 ilen, &outp, &olen, KICONV_LOWER);
856 msdosfs_iconv->convchr(pmp->pm_d2u, (const char **)instr,
861 * return '?' if failed to convert
871 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
878 if (lower & (LCASE_BASE | LCASE_EXT))
880 return ((u_int16_t)c);
884 * Convert Local char to DOS char
887 unix2doschr(const u_char **instr, size_t *ilen, struct msdosfsmount *pmp)
890 char *up, *outp, unicode[3], outbuf[3];
892 size_t len, ucslen, unixlen, olen;
894 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
896 * to hide an invisible character, using a unicode filter
901 msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
903 unixlen = len - *ilen;
906 * cannot be converted
915 * return magic number for ascii char
927 * now convert using libiconv
934 msdosfs_iconv->convchr_case(pmp->pm_u2d, (const char **)instr,
935 ilen, &outp, &olen, KICONV_FROM_UPPER);
939 * cannot be converted, but has unicode char, should return magic number
949 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
957 return ((u_int16_t)c);
961 * Convert Windows char to Local char
964 win2unixchr(u_int16_t wc, struct msdosfsmount *pmp)
966 u_char *inp, *outp, inbuf[3], outbuf[3];
967 size_t ilen, olen, len;
972 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
973 inbuf[0] = (u_char)(wc>>8);
974 inbuf[1] = (u_char)wc;
977 ilen = olen = len = 2;
980 msdosfs_iconv->convchr(pmp->pm_w2u, (const char **)&inp, &ilen,
981 (char **)&outp, &olen);
985 * return '?' if failed to convert
994 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
1005 * Convert Local char to Windows char
1008 unix2winchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
1010 u_char *outp, outbuf[3];
1017 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
1020 if (lower & (LCASE_BASE | LCASE_EXT))
1021 msdosfs_iconv->convchr_case(pmp->pm_u2w, (const char **)instr,
1022 ilen, (char **)&outp, &olen,
1025 msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
1026 ilen, (char **)&outp, &olen);
1029 * return '0' if end of filename
1034 wc = (outbuf[0]<<8) | outbuf[1];
1041 if (lower & (LCASE_BASE | LCASE_EXT))
1048 * Initialize the temporary concatenation buffer (once) and mark it as
1049 * empty on subsequent calls.
1055 if (nambuf_ptr == NULL) {
1056 nambuf_ptr = malloc(MAXNAMLEN + 1, M_MSDOSFSMNT, M_WAITOK);
1057 nambuf_ptr[MAXNAMLEN] = '\0';
1060 nambuf_last_id = -1;
1064 * Fill out our concatenation buffer with the given substring, at the offset
1065 * specified by its id. Since this function must be called with ids in
1066 * descending order, we take advantage of the fact that ASCII substrings are
1067 * exactly WIN_CHARS in length. For non-ASCII substrings, we shift all
1068 * previous (i.e. higher id) substrings upwards to make room for this one.
1069 * This only penalizes portions of substrings that contain more than
1070 * WIN_CHARS bytes when they are first encountered.
1073 mbnambuf_write(char *name, int id)
1078 KASSERT(nambuf_len == 0 || id == nambuf_last_id - 1,
1079 ("non-decreasing id, id %d last id %d", id, nambuf_last_id));
1081 /* Store this substring in a WIN_CHAR-aligned slot. */
1082 slot = nambuf_ptr + (id * WIN_CHARS);
1083 count = strlen(name);
1084 if (nambuf_len + count > MAXNAMLEN) {
1085 printf("msdosfs: file name %zu too long\n", nambuf_len + count);
1089 /* Shift suffix upwards by the amount length exceeds WIN_CHARS. */
1090 if (count > WIN_CHARS && nambuf_len != 0)
1091 bcopy(slot + WIN_CHARS, slot + count, nambuf_len);
1093 /* Copy in the substring to its slot and update length so far. */
1094 bcopy(name, slot, count);
1095 nambuf_len += count;
1096 nambuf_last_id = id;
1100 * Take the completed string and use it to setup the struct dirent.
1101 * Be sure to always nul-terminate the d_name and then copy the string
1102 * from our buffer. Note that this function assumes the full string has
1103 * been reassembled in the buffer. If it's called before all substrings
1104 * have been written via mbnambuf_write(), the result will be incorrect.
1107 mbnambuf_flush(struct dirent *dp)
1110 if (nambuf_len > sizeof(dp->d_name) - 1) {
1114 bcopy(nambuf_ptr, dp->d_name, nambuf_len);
1115 dp->d_name[nambuf_len] = '\0';
1116 dp->d_namlen = nambuf_len;
1119 return (dp->d_name);