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
61extern struct iconv_functions *msdosfs_iconv;
62
63static int mbsadjpos(const char **, size_t, size_t, int, int, void *handle);
64static u_char * dos2unixchr(u_char *, const u_char **, size_t *, int, struct msdosfsmount *);
65static u_int16_t unix2doschr(const u_char **, size_t *, struct msdosfsmount *);
66static u_char * win2unixchr(u_char *, u_int16_t, struct msdosfsmount *);
67static 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 */
76static u_char
77unix2dos[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
113static u_char
114dos2unix[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
150static u_char
151u2l[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
187static u_char
188l2u[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 */
236int
237dos2unixfn(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_char *c, tmpbuf[5];
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(tmpbuf, (const u_char **)&dn, &i,
261 lower & LCASE_BASE, pmp);
262 while (*c != '\0') {
263 *un++ = *c++;
264 thislong++;
265 }
266 }
267 dn += i;
268
269 /*
270 * Now, if there is an extension then put in a period and copy in
271 * the extension.
272 */
273 if (*dn != ' ') {
274 *un++ = '.';
275 thislong++;
276 for (i = 3; i > 0 && *dn != ' ';) {
277 c = dos2unixchr(tmpbuf, (const u_char **)&dn, &i,
278 lower & LCASE_EXT, pmp);
279 while (*c != '\0') {
280 *un++ = *c++;
281 thislong++;
282 }
283 }
284 }
285 *un++ = 0;
286
287 return (thislong);
288}
289
290/*
291 * Convert a unix filename to a DOS filename according to Win95 rules.
292 * If applicable and gen is not 0, it is inserted into the converted
293 * filename as a generation number.
294 * Returns
295 * 0 if name couldn't be converted
296 * 1 if the converted name is the same as the original
297 * (no long filename entry necessary for Win95)
298 * 2 if conversion was successful
299 * 3 if conversion was successful and generation number was inserted
300 */
301int
302unix2dosfn(un, dn, unlen, gen, pmp)
303 const u_char *un;
304 u_char dn[12];
305 size_t unlen;
306 u_int gen;
307 struct msdosfsmount *pmp;
308{
309 ssize_t i, j;
310 int l;
311 int conv = 1;
312 const u_char *cp, *dp, *dp1;
313 u_char gentext[6], *wcp;
314 u_int16_t c;
315
316 /*
317 * Fill the dos filename string with blanks. These are DOS's pad
318 * characters.
319 */
320 for (i = 0; i < 11; i++)
321 dn[i] = ' ';
322 dn[11] = 0;
323
324 /*
325 * The filenames "." and ".." are handled specially, since they
326 * don't follow dos filename rules.
327 */
328 if (un[0] == '.' && unlen == 1) {
329 dn[0] = '.';
330 return gen <= 1;
331 }
332 if (un[0] == '.' && un[1] == '.' && unlen == 2) {
333 dn[0] = '.';
334 dn[1] = '.';
335 return gen <= 1;
336 }
337
338 /*
339 * Filenames with only blanks and dots are not allowed!
340 */
341 for (cp = un, i = unlen; --i >= 0; cp++)
342 if (*cp != ' ' && *cp != '.')
343 break;
344 if (i < 0)
345 return 0;
346
347
348 /*
349 * Filenames with some characters are not allowed!
350 */
351 for (cp = un, i = unlen; i > 0;)
352 if (unix2doschr(&cp, (size_t *)&i, pmp) == 0)
353 return 0;
354
355 /*
356 * Now find the extension
357 * Note: dot as first char doesn't start extension
358 * and trailing dots and blanks are ignored
359 * Note(2003/7): It seems recent Windows has
360 * defferent rule than this code, that Windows
361 * ignores all dots before extension, and use all
362 * chars as filename except for dots.
363 */
364 dp = dp1 = 0;
365 for (cp = un + 1, i = unlen - 1; --i >= 0;) {
366 switch (*cp++) {
367 case '.':
368 if (!dp1)
369 dp1 = cp;
370 break;
371 case ' ':
372 break;
373 default:
374 if (dp1)
375 dp = dp1;
376 dp1 = 0;
377 break;
378 }
379 }
380
381 /*
382 * Now convert it (this part is for extension).
383 * As Windows XP do, if it's not ascii char,
384 * this function should return 2 or 3, so that checkng out Unicode name.
385 */
386 if (dp) {
387 if (dp1)
388 l = dp1 - dp;
389 else
390 l = unlen - (dp - un);
391 for (cp = dp, i = l, j = 8; i > 0 && j < 11; j++) {
392 c = unix2doschr(&cp, (size_t *)&i, pmp);
393 if (c & 0xff00) {
394 dn[j] = c >> 8;
395 if (++j < 11) {
396 dn[j] = c;
397 if (conv != 3)
398 conv = 2;
399 continue;
400 } else {
401 conv = 3;
402 dn[j-1] = ' ';
403 break;
404 }
405 } else {
406 dn[j] = c;
407 }
408 if (((dn[j] & 0x80) || *(cp - 1) != dn[j]) && conv != 3)
409 conv = 2;
410 if (dn[j] == 1) {
411 conv = 3;
412 dn[j] = '_';
413 }
414 if (dn[j] == 2) {
415 conv = 3;
416 dn[j--] = ' ';
417 }
418 }
419 if (i > 0)
420 conv = 3;
421 dp--;
422 } else {
423 for (dp = cp; *--dp == ' ' || *dp == '.';);
424 dp++;
425 }
426
427 /*
428 * Now convert the rest of the name
429 */
430 for (i = dp - un, j = 0; un < dp && j < 8; j++) {
431 c = unix2doschr(&un, &i, pmp);
432 if (c & 0xff00) {
433 dn[j] = c >> 8;
434 if (++j < 8) {
435 dn[j] = c;
436 if (conv != 3)
437 conv = 2;
438 continue;
439 } else {
440 conv = 3;
441 dn[j-1] = ' ';
442 break;
443 }
444 } else {
445 dn[j] = c;
446 }
447 if (((dn[j] & 0x80) || *(un - 1) != dn[j]) && conv != 3)
448 conv = 2;
449 if (dn[j] == 1) {
450 conv = 3;
451 dn[j] = '_';
452 }
453 if (dn[j] == 2) {
454 conv = 3;
455 dn[j--] = ' ';
456 }
457 }
458 if (un < dp)
459 conv = 3;
460 /*
461 * If we didn't have any chars in filename,
462 * generate a default
463 */
464 if (!j)
465 dn[0] = '_';
466
467 /*
468 * If there wasn't any char dropped,
469 * there is no place for generation numbers
470 */
471 if (conv != 3) {
472 if (gen > 1)
473 conv = 0;
474 goto done;
475 }
476
477 /*
478 * Now insert the generation number into the filename part
479 */
480 if (gen == 0)
481 goto done;
482 for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
483 *--wcp = gen % 10 + '0';
484 if (gen) {
485 conv = 0;
486 goto done;
487 }
488 for (i = 8; dn[--i] == ' ';);
489 i++;
490 if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
491 i = 8 - (gentext + sizeof(gentext) - wcp + 1);
492 /*
493 * Correct posision to where insert the generation number
494 */
495 cp = dn;
496 i -= mbsadjpos((const char**)&cp, i, unlen, 1, pmp->pm_flags, pmp->pm_d2u);
497
498 dn[i++] = '~';
499 while (wcp < gentext + sizeof(gentext))
500 dn[i++] = *wcp++;
501
502 /*
503 * Tail of the filename should be space
504 */
505 while (i < 8)
506 dn[i++] = ' ';
507 conv = 3;
508
509done:
510 /*
511 * The first character cannot be E5,
512 * because that means a deleted entry
513 */
514 if (dn[0] == 0xe5)
515 dn[0] = SLOT_E5;
516
517 return conv;
518}
519
520/*
521 * Create a Win95 long name directory entry
522 * Note: assumes that the filename is valid,
523 * i.e. doesn't consist solely of blanks and dots
524 */
525int
526unix2winfn(un, unlen, wep, cnt, chksum, pmp)
527 const u_char *un;
528 size_t unlen;
529 struct winentry *wep;
530 int cnt;
531 int chksum;
532 struct msdosfsmount *pmp;
533{
534 u_int8_t *wcp;
535 int i, end;
536 u_int16_t code;
537
538 /*
539 * Drop trailing blanks and dots
540 */
541 unlen = winLenFixup(un, unlen);
542
543 /*
544 * Cut *un for this slot
545 */
546 unlen = mbsadjpos((const char **)&un, unlen, (cnt - 1) * WIN_CHARS, 2,
547 pmp->pm_flags, pmp->pm_u2w);
548
549 /*
550 * Initialize winentry to some useful default
551 */
552 for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff);
553 wep->weCnt = cnt;
554 wep->weAttributes = ATTR_WIN95;
555 wep->weReserved1 = 0;
556 wep->weChksum = chksum;
557 wep->weReserved2 = 0;
558
559 /*
560 * Now convert the filename parts
561 */
562 end = 0;
563 for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0 && !end;) {
564 code = unix2winchr(&un, &unlen, 0, pmp);
565 *wcp++ = code;
566 *wcp++ = code >> 8;
567 if (!code)
568 end = WIN_LAST;
569 }
570 for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0 && !end;) {
571 code = unix2winchr(&un, &unlen, 0, pmp);
572 *wcp++ = code;
573 *wcp++ = code >> 8;
574 if (!code)
575 end = WIN_LAST;
576 }
577 for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0 && !end;) {
578 code = unix2winchr(&un, &unlen, 0, pmp);
579 *wcp++ = code;
580 *wcp++ = code >> 8;
581 if (!code)
582 end = WIN_LAST;
583 }
584 if (*un == '\0')
585 end = WIN_LAST;
586 wep->weCnt |= end;
587 return !end;
588}
589
590/*
591 * Compare our filename to the one in the Win95 entry
592 * Returns the checksum or -1 if no match
593 */
594int
595winChkName(nbp, un, unlen, chksum, pmp)
596 struct mbnambuf *nbp;
597 const u_char *un;
598 size_t unlen;
599 int chksum;
600 struct msdosfsmount *pmp;
601{
602 size_t len;
603 u_int16_t c1, c2;
604 u_char *np;
605 struct dirent dirbuf;
606
607 /*
608 * We already have winentry in *nbp.
609 */
610 if (!mbnambuf_flush(nbp, &dirbuf) || dirbuf.d_namlen == 0)
611 return -1;
612
613#ifdef MSDOSFS_DEBUG
614 printf("winChkName(): un=%s:%d,d_name=%s:%d\n", un, unlen,
615 dirbuf.d_name,
616 dirbuf.d_namlen);
617#endif
618
619 /*
620 * Compare the name parts
621 */
622 len = dirbuf.d_namlen;
623 if (unlen != len)
624 return -2;
625
626 for (np = dirbuf.d_name; unlen > 0 && len > 0;) {
627 /*
628 * Comparison must be case insensitive, because FAT disallows
629 * to look up or create files in case sensitive even when
630 * it's a long file name.
631 */
632 c1 = unix2winchr((const u_char **)&np, &len, LCASE_BASE, pmp);
633 c2 = unix2winchr(&un, &unlen, LCASE_BASE, pmp);
634 if (c1 != c2)
635 return -2;
636 }
637 return chksum;
638}
639
640/*
641 * Convert Win95 filename to dirbuf.
642 * Returns the checksum or -1 if impossible
643 */
644int
645win2unixfn(nbp, wep, chksum, pmp)
646 struct mbnambuf *nbp;
647 struct winentry *wep;
648 int chksum;
649 struct msdosfsmount *pmp;
650{
651 u_char *c, tmpbuf[5];
652 u_int8_t *cp;
653 u_int8_t *np, name[WIN_CHARS * 3 + 1];
654 u_int16_t code;
655 int i;
656
657 if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
658 || !(wep->weCnt&WIN_CNT))
659 return -1;
660
661 /*
662 * First compare checksums
663 */
664 if (wep->weCnt&WIN_LAST) {
665 chksum = wep->weChksum;
666 } else if (chksum != wep->weChksum)
667 chksum = -1;
668 if (chksum == -1)
669 return -1;
670
671 /*
672 * Convert the name parts
673 */
674 np = name;
675 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
676 code = (cp[1] << 8) | cp[0];
677 switch (code) {
678 case 0:
679 *np = '\0';
680 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
681 return chksum;
682 case '/':
683 *np = '\0';
684 return -1;
685 default:
686 c = win2unixchr(tmpbuf, code, pmp);
687 while (*c != '\0')
688 *np++ = *c++;
689 break;
690 }
691 cp += 2;
692 }
693 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
694 code = (cp[1] << 8) | cp[0];
695 switch (code) {
696 case 0:
697 *np = '\0';
698 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
699 return chksum;
700 case '/':
701 *np = '\0';
702 return -1;
703 default:
704 c = win2unixchr(tmpbuf, code, pmp);
705 while (*c != '\0')
706 *np++ = *c++;
707 break;
708 }
709 cp += 2;
710 }
711 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
712 code = (cp[1] << 8) | cp[0];
713 switch (code) {
714 case 0:
715 *np = '\0';
716 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
717 return chksum;
718 case '/':
719 *np = '\0';
720 return -1;
721 default:
722 c = win2unixchr(tmpbuf, code, pmp);
723 while (*c != '\0')
724 *np++ = *c++;
725 break;
726 }
727 cp += 2;
728 }
729 *np = '\0';
730 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
731 return chksum;
732}
733
734/*
735 * Compute the unrolled checksum of a DOS filename for Win95 LFN use.
736 */
737u_int8_t
738winChksum(u_int8_t *name)
739{
740 int i;
741 u_int8_t s;
742
743 for (s = 0, i = 11; --i >= 0; s += *name++)
744 s = (s << 7)|(s >> 1);
745 return (s);
746}
747
748/*
749 * Determine the number of slots necessary for Win95 names
750 */
751int
752winSlotCnt(un, unlen, pmp)
753 const u_char *un;
754 size_t unlen;
755 struct msdosfsmount *pmp;
756{
757 size_t wlen;
758 char wn[WIN_MAXLEN * 2 + 1], *wnp;
759
760 unlen = winLenFixup(un, unlen);
761
762 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
763 wlen = WIN_MAXLEN * 2;
764 wnp = wn;
765 msdosfs_iconv->conv(pmp->pm_u2w, (const char **)&un, &unlen, &wnp, &wlen);
766 if (unlen > 0)
767 return 0;
768 return howmany(WIN_MAXLEN - wlen/2, WIN_CHARS);
769 }
770
771 if (unlen > WIN_MAXLEN)
772 return 0;
773 return howmany(unlen, WIN_CHARS);
774}
775
776/*
|