1 /* $FreeBSD: releng/8.0/sys/fs/msdosfs/msdosfs_conv.c 187199 2009-01-13 22:35:26Z trasz $ */
2 /* $NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $ */
3
4 /*-
5 * Copyright (C) 1995, 1997 Wolfgang Solfrank.
6 * Copyright (C) 1995, 1997 TooLs GmbH.
7 * All rights reserved.
8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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.
23 *
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.
34 */
35 /*-
36 * Written by Paul Popelka (paulp@uts.amdahl.com)
37 *
38 * You can do anything you want with this software, just don't say you wrote
39 * it, and don't remove this notice.
40 *
41 * This software is provided "as is".
42 *
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.
47 *
48 * October 1992
49 */
50
51 #include <sys/param.h>
52 #include <sys/systm.h>
53 #include <sys/dirent.h>
54 #include <sys/iconv.h>
55 #include <sys/mount.h>
56
57 #include <fs/msdosfs/bpb.h>
58 #include <fs/msdosfs/direntry.h>
59 #include <fs/msdosfs/msdosfsmount.h>
60
61 extern struct iconv_functions *msdosfs_iconv;
62
63 static int mbsadjpos(const char **, size_t, size_t, int, int, void *handle);
64 static u_int16_t dos2unixchr(const u_char **, size_t *, int, struct msdosfsmount *);
65 static u_int16_t unix2doschr(const u_char **, size_t *, struct msdosfsmount *);
66 static u_int16_t win2unixchr(u_int16_t, struct msdosfsmount *);
67 static u_int16_t unix2winchr(const u_char **, size_t *, int, struct msdosfsmount *);
68
69 /*
70 * 0 - character disallowed in long file name.
71 * 1 - character should be replaced by '_' in DOS file name,
72 * and generation number inserted.
73 * 2 - character ('.' and ' ') should be skipped in DOS file name,
74 * and generation number inserted.
75 */
76 static u_char
77 unix2dos[256] = {
78 /* iso8859-1 -> cp850 */
79 0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */
80 0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */
81 0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */
82 0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */
83 2, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
84 0x28, 0x29, 0, 1, 1, 0x2d, 2, 0, /* 28-2f */
85 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
86 0x38, 0x39, 0, 1, 0, 1, 0, 0, /* 38-3f */
87 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
88 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
89 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
90 0x58, 0x59, 0x5a, 1, 0, 1, 0x5e, 0x5f, /* 58-5f */
91 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */
92 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */
93 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */
94 0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */
95 0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */
96 0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */
97 0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */
98 0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */
99 0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */
100 0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */
101 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */
102 0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */
103 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */
104 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */
105 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */
106 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */
107 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */
108 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */
109 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */
110 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */
111 };
112
113 static u_char
114 dos2unix[256] = {
115 /* cp850 -> iso8859-1 */
116 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */
117 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */
118 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */
119 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */
120 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
121 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
122 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
123 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
124 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
125 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
126 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
127 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
128 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
129 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
130 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
131 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
132 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */
133 0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */
134 0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */
135 0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */
136 0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */
137 0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */
138 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */
139 0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */
140 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */
141 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */
142 0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */
143 0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */
144 0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */
145 0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */
146 0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */
147 0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */
148 };
149
150 static u_char
151 u2l[256] = {
152 /* tolower */
153 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
154 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
155 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
156 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
157 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
158 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
159 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
160 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
161 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
162 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
163 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
164 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
165 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
166 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
167 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
168 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
169 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
170 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
171 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
172 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
173 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
174 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
175 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
176 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
177 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
178 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
179 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
180 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
181 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
182 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
183 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
184 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
185 };
186
187 static u_char
188 l2u[256] = {
189 /* toupper */
190 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
191 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
192 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
193 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
194 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
195 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
196 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
197 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
198 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
199 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
200 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
201 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
202 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
203 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
204 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
205 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
206 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
207 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
208 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
209 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
210 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
211 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
212 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
213 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
214 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
215 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
216 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
217 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
218 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
219 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
220 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
221 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
222 };
223
224 /*
225 * DOS filenames are made of 2 parts, the name part and the extension part.
226 * The name part is 8 characters long and the extension part is 3
227 * characters long. They may contain trailing blanks if the name or
228 * extension are not long enough to fill their respective fields.
229 */
230
231 /*
232 * Convert a DOS filename to a unix filename. And, return the number of
233 * characters in the resulting unix filename excluding the terminating
234 * null.
235 */
236 int
237 dos2unixfn(dn, un, lower, pmp)
238 u_char dn[11];
239 u_char *un;
240 int lower;
241 struct msdosfsmount *pmp;
242 {
243 size_t i;
244 int thislong = 0;
245 u_int16_t c;
246
247 /*
248 * If first char of the filename is SLOT_E5 (0x05), then the real
249 * first char of the filename should be 0xe5. But, they couldn't
250 * just have a 0xe5 mean 0xe5 because that is used to mean a freed
251 * directory slot. Another dos quirk.
252 */
253 if (*dn == SLOT_E5)
254 *dn = 0xe5;
255
256 /*
257 * Copy the name portion into the unix filename string.
258 */
259 for (i = 8; i > 0 && *dn != ' ';) {
260 c = dos2unixchr((const u_char **)&dn, &i, lower & LCASE_BASE,
261 pmp);
262 if (c & 0xff00) {
263 *un++ = c >> 8;
264 thislong++;
265 }
266 *un++ = c;
267 thislong++;
268 }
269 dn += i;
270
271 /*
272 * Now, if there is an extension then put in a period and copy in
273 * the extension.
274 */
275 if (*dn != ' ') {
276 *un++ = '.';
277 thislong++;
278 for (i = 3; i > 0 && *dn != ' ';) {
279 c = dos2unixchr((const u_char **)&dn, &i,
280 lower & LCASE_EXT, pmp);
281 if (c & 0xff00) {
282 *un++ = c >> 8;
283 thislong++;
284 }
285 *un++ = c;
286 thislong++;
287 }
288 }
289 *un++ = 0;
290
291 return (thislong);
292 }
293
294 /*
295 * Convert a unix filename to a DOS filename according to Win95 rules.
296 * If applicable and gen is not 0, it is inserted into the converted
297 * filename as a generation number.
298 * Returns
299 * 0 if name couldn't be converted
300 * 1 if the converted name is the same as the original
301 * (no long filename entry necessary for Win95)
302 * 2 if conversion was successful
303 * 3 if conversion was successful and generation number was inserted
304 */
305 int
306 unix2dosfn(un, dn, unlen, gen, pmp)
307 const u_char *un;
308 u_char dn[12];
309 size_t unlen;
310 u_int gen;
311 struct msdosfsmount *pmp;
312 {
313 ssize_t i, j;
314 int l;
315 int conv = 1;
316 const u_char *cp, *dp, *dp1;
317 u_char gentext[6], *wcp;
318 u_int16_t c;
319
320 /*
321 * Fill the dos filename string with blanks. These are DOS's pad
322 * characters.
323 */
324 for (i = 0; i < 11; i++)
325 dn[i] = ' ';
326 dn[11] = 0;
327
328 /*
329 * The filenames "." and ".." are handled specially, since they
330 * don't follow dos filename rules.
331 */
332 if (un[0] == '.' && unlen == 1) {
333 dn[0] = '.';
334 return gen <= 1;
335 }
336 if (un[0] == '.' && un[1] == '.' && unlen == 2) {
337 dn[0] = '.';
338 dn[1] = '.';
339 return gen <= 1;
340 }
341
342 /*
343 * Filenames with only blanks and dots are not allowed!
344 */
345 for (cp = un, i = unlen; --i >= 0; cp++)
346 if (*cp != ' ' && *cp != '.')
347 break;
348 if (i < 0)
349 return 0;
350
351
352 /*
353 * Filenames with some characters are not allowed!
354 */
355 for (cp = un, i = unlen; i > 0;)
356 if (unix2doschr(&cp, (size_t *)&i, pmp) == 0)
357 return 0;
358
359 /*
360 * Now find the extension
361 * Note: dot as first char doesn't start extension
362 * and trailing dots and blanks are ignored
363 * Note(2003/7): It seems recent Windows has
364 * defferent rule than this code, that Windows
365 * ignores all dots before extension, and use all
366 * chars as filename except for dots.
367 */
368 dp = dp1 = 0;
369 for (cp = un + 1, i = unlen - 1; --i >= 0;) {
370 switch (*cp++) {
371 case '.':
372 if (!dp1)
373 dp1 = cp;
374 break;
375 case ' ':
376 break;
377 default:
378 if (dp1)
379 dp = dp1;
380 dp1 = 0;
381 break;
382 }
383 }
384
385 /*
386 * Now convert it (this part is for extension).
387 * As Windows XP do, if it's not ascii char,
388 * this function should return 2 or 3, so that checkng out Unicode name.
389 */
390 if (dp) {
391 if (dp1)
392 l = dp1 - dp;
393 else
394 l = unlen - (dp - un);
395 for (cp = dp, i = l, j = 8; i > 0 && j < 11; j++) {
396 c = unix2doschr(&cp, (size_t *)&i, pmp);
397 if (c & 0xff00) {
398 dn[j] = c >> 8;
399 if (++j < 11) {
400 dn[j] = c;
401 if (conv != 3)
402 conv = 2;
403 continue;
404 } else {
405 conv = 3;
406 dn[j-1] = ' ';
407 break;
408 }
409 } else {
410 dn[j] = c;
411 }
412 if (((dn[j] & 0x80) || *(cp - 1) != dn[j]) && conv != 3)
413 conv = 2;
414 if (dn[j] == 1) {
415 conv = 3;
416 dn[j] = '_';
417 }
418 if (dn[j] == 2) {
419 conv = 3;
420 dn[j--] = ' ';
421 }
422 }
423 if (i > 0)
424 conv = 3;
425 dp--;
426 } else {
427 for (dp = cp; *--dp == ' ' || *dp == '.';);
428 dp++;
429 }
430
431 /*
432 * Now convert the rest of the name
433 */
434 for (i = dp - un, j = 0; un < dp && j < 8; j++) {
435 c = unix2doschr(&un, &i, pmp);
436 if (c & 0xff00) {
437 dn[j] = c >> 8;
438 if (++j < 8) {
439 dn[j] = c;
440 if (conv != 3)
441 conv = 2;
442 continue;
443 } else {
444 conv = 3;
445 dn[j-1] = ' ';
446 break;
447 }
448 } else {
449 dn[j] = c;
450 }
451 if (((dn[j] & 0x80) || *(un - 1) != dn[j]) && conv != 3)
452 conv = 2;
453 if (dn[j] == 1) {
454 conv = 3;
455 dn[j] = '_';
456 }
457 if (dn[j] == 2) {
458 conv = 3;
459 dn[j--] = ' ';
460 }
461 }
462 if (un < dp)
463 conv = 3;
464 /*
465 * If we didn't have any chars in filename,
466 * generate a default
467 */
468 if (!j)
469 dn[0] = '_';
470
471 /*
472 * If there wasn't any char dropped,
473 * there is no place for generation numbers
474 */
475 if (conv != 3) {
476 if (gen > 1)
477 conv = 0;
478 goto done;
479 }
480
481 /*
482 * Now insert the generation number into the filename part
483 */
484 if (gen == 0)
485 goto done;
486 for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
487 *--wcp = gen % 10 + '';
488 if (gen) {
489 conv = 0;
490 goto done;
491 }
492 for (i = 8; dn[--i] == ' ';);
493 i++;
494 if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
495 i = 8 - (gentext + sizeof(gentext) - wcp + 1);
496 /*
497 * Correct posision to where insert the generation number
498 */
499 cp = dn;
500 i -= mbsadjpos((const char**)&cp, i, unlen, 1, pmp->pm_flags, pmp->pm_d2u);
501
502 dn[i++] = '~';
503 while (wcp < gentext + sizeof(gentext))
504 dn[i++] = *wcp++;
505
506 /*
507 * Tail of the filename should be space
508 */
509 while (i < 8)
510 dn[i++] = ' ';
511 conv = 3;
512
513 done:
514 /*
515 * The first character cannot be E5,
516 * because that means a deleted entry
517 */
518 if (dn[0] == 0xe5)
519 dn[0] = SLOT_E5;
520
521 return conv;
522 }
523
524 /*
525 * Create a Win95 long name directory entry
526 * Note: assumes that the filename is valid,
527 * i.e. doesn't consist solely of blanks and dots
528 */
529 int
530 unix2winfn(un, unlen, wep, cnt, chksum, pmp)
531 const u_char *un;
532 size_t unlen;
533 struct winentry *wep;
534 int cnt;
535 int chksum;
536 struct msdosfsmount *pmp;
537 {
538 u_int8_t *wcp;
539 int i, end;
540 u_int16_t code;
541
542 /*
543 * Drop trailing blanks and dots
544 */
545 unlen = winLenFixup(un, unlen);
546
547 /*
548 * Cut *un for this slot
549 */
550 unlen = mbsadjpos((const char **)&un, unlen, (cnt - 1) * WIN_CHARS, 2,
551 pmp->pm_flags, pmp->pm_u2w);
552
553 /*
554 * Initialize winentry to some useful default
555 */
556 for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff);
557 wep->weCnt = cnt;
558 wep->weAttributes = ATTR_WIN95;
559 wep->weReserved1 = 0;
560 wep->weChksum = chksum;
561 wep->weReserved2 = 0;
562
563 /*
564 * Now convert the filename parts
565 */
566 end = 0;
567 for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0 && !end;) {
568 code = unix2winchr(&un, &unlen, 0, pmp);
569 *wcp++ = code;
570 *wcp++ = code >> 8;
571 if (!code)
572 end = WIN_LAST;
573 }
574 for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0 && !end;) {
575 code = unix2winchr(&un, &unlen, 0, pmp);
576 *wcp++ = code;
577 *wcp++ = code >> 8;
578 if (!code)
579 end = WIN_LAST;
580 }
581 for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0 && !end;) {
582 code = unix2winchr(&un, &unlen, 0, pmp);
583 *wcp++ = code;
584 *wcp++ = code >> 8;
585 if (!code)
586 end = WIN_LAST;
587 }
588 if (*un == '\0')
589 end = WIN_LAST;
590 wep->weCnt |= end;
591 return !end;
592 }
593
594 /*
595 * Compare our filename to the one in the Win95 entry
596 * Returns the checksum or -1 if no match
597 */
598 int
599 winChkName(nbp, un, unlen, chksum, pmp)
600 struct mbnambuf *nbp;
601 const u_char *un;
602 size_t unlen;
603 int chksum;
604 struct msdosfsmount *pmp;
605 {
606 size_t len;
607 u_int16_t c1, c2;
608 u_char *np;
609 struct dirent dirbuf;
610
611 /*
612 * We already have winentry in *nbp.
613 */
614 if (!mbnambuf_flush(nbp, &dirbuf) || dirbuf.d_namlen == 0)
615 return -1;
616
617 #ifdef MSDOSFS_DEBUG
618 printf("winChkName(): un=%s:%d,d_name=%s:%d\n", un, unlen,
619 dirbuf.d_name,
620 dirbuf.d_namlen);
621 #endif
622
623 /*
624 * Compare the name parts
625 */
626 len = dirbuf.d_namlen;
627 if (unlen != len)
628 return -2;
629
630 for (np = dirbuf.d_name; unlen > 0 && len > 0;) {
631 /*
632 * Comparison must be case insensitive, because FAT disallows
633 * to look up or create files in case sensitive even when
634 * it's a long file name.
635 */
636 c1 = unix2winchr((const u_char **)&np, &len, LCASE_BASE, pmp);
637 c2 = unix2winchr(&un, &unlen, LCASE_BASE, pmp);
638 if (c1 != c2)
639 return -2;
640 }
641 return chksum;
642 }
643
644 /*
645 * Convert Win95 filename to dirbuf.
646 * Returns the checksum or -1 if impossible
647 */
648 int
649 win2unixfn(nbp, wep, chksum, pmp)
650 struct mbnambuf *nbp;
651 struct winentry *wep;
652 int chksum;
653 struct msdosfsmount *pmp;
654 {
655 u_int8_t *cp;
656 u_int8_t *np, name[WIN_CHARS * 2 + 1];
657 u_int16_t code;
658 int i;
659
660 if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
661 || !(wep->weCnt&WIN_CNT))
662 return -1;
663
664 /*
665 * First compare checksums
666 */
667 if (wep->weCnt&WIN_LAST) {
668 chksum = wep->weChksum;
669 } else if (chksum != wep->weChksum)
670 chksum = -1;
671 if (chksum == -1)
672 return -1;
673
674 /*
675 * Convert the name parts
676 */
677 np = name;
678 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
679 code = (cp[1] << 8) | cp[0];
680 switch (code) {
681 case 0:
682 *np = '\0';
683 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
684 return chksum;
685 case '/':
686 *np = '\0';
687 return -1;
688 default:
689 code = win2unixchr(code, pmp);
690 if (code & 0xff00)
691 *np++ = code >> 8;
692 *np++ = code;
693 break;
694 }
695 cp += 2;
696 }
697 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
698 code = (cp[1] << 8) | cp[0];
699 switch (code) {
700 case 0:
701 *np = '\0';
702 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
703 return chksum;
704 case '/':
705 *np = '\0';
706 return -1;
707 default:
708 code = win2unixchr(code, pmp);
709 if (code & 0xff00)
710 *np++ = code >> 8;
711 *np++ = code;
712 break;
713 }
714 cp += 2;
715 }
716 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
717 code = (cp[1] << 8) | cp[0];
718 switch (code) {
719 case 0:
720 *np = '\0';
721 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
722 return chksum;
723 case '/':
724 *np = '\0';
725 return -1;
726 default:
727 code = win2unixchr(code, pmp);
728 if (code & 0xff00)
729 *np++ = code >> 8;
730 *np++ = code;
731 break;
732 }
733 cp += 2;
734 }
735 *np = '\0';
736 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
737 return chksum;
738 }
739
740 /*
741 * Compute the unrolled checksum of a DOS filename for Win95 LFN use.
742 */
743 u_int8_t
744 winChksum(struct direntry *dep)
745 {
746 u_int8_t s;
747
748 s = dep->deName[0];
749 s = ((s << 7) | (s >> 1)) + dep->deName[1];
750 s = ((s << 7) | (s >> 1)) + dep->deName[2];
751 s = ((s << 7) | (s >> 1)) + dep->deName[3];
752 s = ((s << 7) | (s >> 1)) + dep->deName[4];
753 s = ((s << 7) | (s >> 1)) + dep->deName[5];
754 s = ((s << 7) | (s >> 1)) + dep->deName[6];
755 s = ((s << 7) | (s >> 1)) + dep->deName[7];
756 s = ((s << 7) | (s >> 1)) + dep->deExtension[0];
757 s = ((s << 7) | (s >> 1)) + dep->deExtension[1];
758 s = ((s << 7) | (s >> 1)) + dep->deExtension[2];
759
760 return (s);
761 }
762
763 /*
764 * Determine the number of slots necessary for Win95 names
765 */
766 int
767 winSlotCnt(un, unlen, pmp)
768 const u_char *un;
769 size_t unlen;
770 struct msdosfsmount *pmp;
771 {
772 size_t wlen;
773 char wn[WIN_MAXLEN * 2 + 1], *wnp;
774
775 unlen = winLenFixup(un, unlen);
776
777 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
778 wlen = WIN_MAXLEN * 2;
779 wnp = wn;
780 msdosfs_iconv->conv(pmp->pm_u2w, (const char **)&un, &unlen, &wnp, &wlen);
781 if (unlen > 0)
782 return 0;
783 return howmany(WIN_MAXLEN - wlen/2, WIN_CHARS);
784 }
785
786 if (unlen > WIN_MAXLEN)
787 return 0;
788 return howmany(unlen, WIN_CHARS);
789 }
790
791 /*
792 * Determine the number of bytes neccesary for Win95 names
793 */
794 size_t
795 winLenFixup(un, unlen)
796 const u_char* un;
797 size_t unlen;
798 {
799 for (un += unlen; unlen > 0; unlen--)
800 if (*--un != ' ' && *un != '.')
801 break;
802 return unlen;
803 }
804
805 /*
806 * Store an area with multi byte string instr, and reterns left
807 * byte of instr and moves pointer forward. The area's size is
808 * inlen or outlen.
809 */
810 static int
811 mbsadjpos(const char **instr, size_t inlen, size_t outlen, int weight, int flag, void *handle)
812 {
813 char *outp, outstr[outlen * weight + 1];
814
815 if (flag & MSDOSFSMNT_KICONV && msdosfs_iconv) {
816 outp = outstr;
817 outlen *= weight;
818 msdosfs_iconv->conv(handle, instr, &inlen, &outp, &outlen);
819 return (inlen);
820 }
821
822 (*instr) += min(inlen, outlen);
823 return (inlen - min(inlen, outlen));
824 }
825
826 /*
827 * Convert DOS char to Local char
828 */
829 static u_int16_t
830 dos2unixchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
831 {
832 u_char c;
833 char *outp, outbuf[3];
834 u_int16_t wc;
835 size_t len, olen;
836
837 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
838 olen = len = 2;
839 outp = outbuf;
840
841 if (lower & (LCASE_BASE | LCASE_EXT))
842 msdosfs_iconv->convchr_case(pmp->pm_d2u, (const char **)instr,
843 ilen, &outp, &olen, KICONV_LOWER);
844 else
845 msdosfs_iconv->convchr(pmp->pm_d2u, (const char **)instr,
846 ilen, &outp, &olen);
847 len -= olen;
848
849 /*
850 * return '?' if failed to convert
851 */
852 if (len == 0) {
853 (*ilen)--;
854 (*instr)++;
855 return ('?');
856 }
857
858 wc = 0;
859 while(len--)
860 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
861 return (wc);
862 }
863
864 (*ilen)--;
865 c = *(*instr)++;
866 c = dos2unix[c];
867 if (lower & (LCASE_BASE | LCASE_EXT))
868 c = u2l[c];
869 return ((u_int16_t)c);
870 }
871
872 /*
873 * Convert Local char to DOS char
874 */
875 static u_int16_t
876 unix2doschr(const u_char **instr, size_t *ilen, struct msdosfsmount *pmp)
877 {
878 u_char c;
879 char *up, *outp, unicode[3], outbuf[3];
880 u_int16_t wc;
881 size_t len, ucslen, unixlen, olen;
882
883 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
884 /*
885 * to hide an invisible character, using a unicode filter
886 */
887 ucslen = 2;
888 len = *ilen;
889 up = unicode;
890 msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
891 ilen, &up, &ucslen);
892 unixlen = len - *ilen;
893
894 /*
895 * cannot be converted
896 */
897 if (unixlen == 0) {
898 (*ilen)--;
899 (*instr)++;
900 return (0);
901 }
902
903 /*
904 * return magic number for ascii char
905 */
906 if (unixlen == 1) {
907 c = *(*instr -1);
908 if (! (c & 0x80)) {
909 c = unix2dos[c];
910 if (c <= 2)
911 return (c);
912 }
913 }
914
915 /*
916 * now convert using libiconv
917 */
918 *instr -= unixlen;
919 *ilen = len;
920
921 olen = len = 2;
922 outp = outbuf;
923 msdosfs_iconv->convchr_case(pmp->pm_u2d, (const char **)instr,
924 ilen, &outp, &olen, KICONV_FROM_UPPER);
925 len -= olen;
926
927 /*
928 * cannot be converted, but has unicode char, should return magic number
929 */
930 if (len == 0) {
931 (*ilen) -= unixlen;
932 (*instr) += unixlen;
933 return (1);
934 }
935
936 wc = 0;
937 while(len--)
938 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
939 return (wc);
940 }
941
942 (*ilen)--;
943 c = *(*instr)++;
944 c = l2u[c];
945 c = unix2dos[c];
946 return ((u_int16_t)c);
947 }
948
949 /*
950 * Convert Windows char to Local char
951 */
952 static u_int16_t
953 win2unixchr(u_int16_t wc, struct msdosfsmount *pmp)
954 {
955 u_char *inp, *outp, inbuf[3], outbuf[3];
956 size_t ilen, olen, len;
957
958 if (wc == 0)
959 return (0);
960
961 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
962 inbuf[0] = (u_char)(wc>>8);
963 inbuf[1] = (u_char)wc;
964 inbuf[2] = '\0';
965
966 ilen = olen = len = 2;
967 inp = inbuf;
968 outp = outbuf;
969 msdosfs_iconv->convchr(pmp->pm_w2u, (const char **)&inp, &ilen,
970 (char **)&outp, &olen);
971 len -= olen;
972
973 /*
974 * return '?' if failed to convert
975 */
976 if (len == 0) {
977 wc = '?';
978 return (wc);
979 }
980
981 wc = 0;
982 while(len--)
983 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
984 return (wc);
985 }
986
987 if (wc & 0xff00)
988 wc = '?';
989
990 return (wc);
991 }
992
993 /*
994 * Convert Local char to Windows char
995 */
996 static u_int16_t
997 unix2winchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
998 {
999 u_char *outp, outbuf[3];
1000 u_int16_t wc;
1001 size_t olen;
1002
1003 if (*ilen == 0)
1004 return (0);
1005
1006 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
1007 outp = outbuf;
1008 olen = 2;
1009 if (lower & (LCASE_BASE | LCASE_EXT))
1010 msdosfs_iconv->convchr_case(pmp->pm_u2w, (const char **)instr,
1011 ilen, (char **)&outp, &olen,
1012 KICONV_FROM_LOWER);
1013 else
1014 msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
1015 ilen, (char **)&outp, &olen);
1016
1017 /*
1018 * return '' if end of filename
1019 */
1020 if (olen == 2)
1021 return (0);
1022
1023 wc = (outbuf[0]<<8) | outbuf[1];
1024
1025 return (wc);
1026 }
1027
1028 (*ilen)--;
1029 wc = (*instr)[0];
1030 if (lower & (LCASE_BASE | LCASE_EXT))
1031 wc = u2l[wc];
1032 (*instr)++;
1033 return (wc);
1034 }
1035
1036 /*
1037 * Initialize the temporary concatenation buffer.
1038 */
1039 void
1040 mbnambuf_init(struct mbnambuf *nbp)
1041 {
1042
1043 nbp->nb_len = 0;
1044 nbp->nb_last_id = -1;
1045 nbp->nb_buf[sizeof(nbp->nb_buf) - 1] = '\0';
1046 }
1047
1048 /*
1049 * Fill out our concatenation buffer with the given substring, at the offset
1050 * specified by its id. Since this function must be called with ids in
1051 * descending order, we take advantage of the fact that ASCII substrings are
1052 * exactly WIN_CHARS in length. For non-ASCII substrings, we shift all
1053 * previous (i.e. higher id) substrings upwards to make room for this one.
1054 * This only penalizes portions of substrings that contain more than
1055 * WIN_CHARS bytes when they are first encountered.
1056 */
1057 void
1058 mbnambuf_write(struct mbnambuf *nbp, char *name, int id)
1059 {
1060 char *slot;
1061 size_t count, newlen;
1062
1063 if (nbp->nb_len != 0 && id != nbp->nb_last_id - 1) {
1064 printf("msdosfs: non-decreasing id: id %d, last id %d\n",
1065 id, nbp->nb_last_id);
1066 return;
1067 }
1068
1069 /* Will store this substring in a WIN_CHARS-aligned slot. */
1070 slot = &nbp->nb_buf[id * WIN_CHARS];
1071 count = strlen(name);
1072 newlen = nbp->nb_len + count;
1073 if (newlen > WIN_MAXLEN || newlen > MAXNAMLEN) {
1074 printf("msdosfs: file name length %zu too large\n", newlen);
1075 return;
1076 }
1077
1078 /* Shift suffix upwards by the amount length exceeds WIN_CHARS. */
1079 if (count > WIN_CHARS && nbp->nb_len != 0)
1080 bcopy(slot + WIN_CHARS, slot + count, nbp->nb_len);
1081
1082 /* Copy in the substring to its slot and update length so far. */
1083 bcopy(name, slot, count);
1084 nbp->nb_len = newlen;
1085 nbp->nb_last_id = id;
1086 }
1087
1088 /*
1089 * Take the completed string and use it to setup the struct dirent.
1090 * Be sure to always nul-terminate the d_name and then copy the string
1091 * from our buffer. Note that this function assumes the full string has
1092 * been reassembled in the buffer. If it's called before all substrings
1093 * have been written via mbnambuf_write(), the result will be incorrect.
1094 */
1095 char *
1096 mbnambuf_flush(struct mbnambuf *nbp, struct dirent *dp)
1097 {
1098
1099 if (nbp->nb_len > sizeof(dp->d_name) - 1) {
1100 mbnambuf_init(nbp);
1101 return (NULL);
1102 }
1103 bcopy(&nbp->nb_buf[0], dp->d_name, nbp->nb_len);
1104 dp->d_name[nbp->nb_len] = '\0';
1105 dp->d_namlen = nbp->nb_len;
1106
1107 mbnambuf_init(nbp);
1108 return (dp->d_name);
1109 }
Cache object: b505880f4d05a2c3b5ce569dee1ba194
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