1 /* $FreeBSD: releng/6.0/sys/fs/msdosfs/msdosfs_conv.c 148344 2005-07-23 17:02:04Z imura $ */
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 /*
52 * System include files.
53 */
54 #include <sys/param.h>
55 #include <sys/time.h>
56 #include <sys/kernel.h> /* defines tz */
57 #include <sys/systm.h>
58 #include <machine/clock.h>
59 #include <sys/dirent.h>
60 #include <sys/iconv.h>
61 #include <sys/mount.h>
62 #include <sys/malloc.h>
63
64 extern struct iconv_functions *msdosfs_iconv;
65
66 /*
67 * MSDOSFS include files.
68 */
69 #include <fs/msdosfs/bpb.h>
70 #include <fs/msdosfs/msdosfsmount.h>
71 #include <fs/msdosfs/direntry.h>
72
73 /*
74 * Total number of days that have passed for each month in a regular year.
75 */
76 static u_short regyear[] = {
77 31, 59, 90, 120, 151, 181,
78 212, 243, 273, 304, 334, 365
79 };
80
81 /*
82 * Total number of days that have passed for each month in a leap year.
83 */
84 static u_short leapyear[] = {
85 31, 60, 91, 121, 152, 182,
86 213, 244, 274, 305, 335, 366
87 };
88
89 /*
90 * Variables used to remember parts of the last time conversion. Maybe we
91 * can avoid a full conversion.
92 */
93 static u_long lasttime;
94 static u_long lastday;
95 static u_short lastddate;
96 static u_short lastdtime;
97
98 static int mbsadjpos(const char **, size_t, size_t, int, int, void *handle);
99 static u_int16_t dos2unixchr(const u_char **, size_t *, int, struct msdosfsmount *);
100 static u_int16_t unix2doschr(const u_char **, size_t *, struct msdosfsmount *);
101 static u_int16_t win2unixchr(u_int16_t, struct msdosfsmount *);
102 static u_int16_t unix2winchr(const u_char **, size_t *, int, struct msdosfsmount *);
103
104 static char *nambuf_ptr;
105 static size_t nambuf_len;
106 static int nambuf_last_id;
107
108 /*
109 * Convert the unix version of time to dos's idea of time to be used in
110 * file timestamps. The passed in unix time is assumed to be in GMT.
111 */
112 void
113 unix2dostime(tsp, ddp, dtp, dhp)
114 struct timespec *tsp;
115 u_int16_t *ddp;
116 u_int16_t *dtp;
117 u_int8_t *dhp;
118 {
119 u_long t;
120 u_long days;
121 u_long inc;
122 u_long year;
123 u_long month;
124 u_short *months;
125
126 /*
127 * If the time from the last conversion is the same as now, then
128 * skip the computations and use the saved result.
129 */
130 t = tsp->tv_sec - (tz_minuteswest * 60)
131 - (wall_cmos_clock ? adjkerntz : 0);
132 /* - daylight savings time correction */
133 t &= ~1;
134 if (lasttime != t) {
135 lasttime = t;
136 lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT)
137 + (((t / 60) % 60) << DT_MINUTES_SHIFT)
138 + (((t / 3600) % 24) << DT_HOURS_SHIFT);
139
140 /*
141 * If the number of days since 1970 is the same as the last
142 * time we did the computation then skip all this leap year
143 * and month stuff.
144 */
145 days = t / (24 * 60 * 60);
146 if (days != lastday) {
147 lastday = days;
148 for (year = 1970;; year++) {
149 inc = year & 0x03 ? 365 : 366;
150 if (days < inc)
151 break;
152 days -= inc;
153 }
154 months = year & 0x03 ? regyear : leapyear;
155 for (month = 0; days >= months[month]; month++)
156 ;
157 if (month > 0)
158 days -= months[month - 1];
159 lastddate = ((days + 1) << DD_DAY_SHIFT)
160 + ((month + 1) << DD_MONTH_SHIFT);
161 /*
162 * Remember dos's idea of time is relative to 1980.
163 * unix's is relative to 1970. If somehow we get a
164 * time before 1980 then don't give totally crazy
165 * results.
166 */
167 if (year > 1980)
168 lastddate += (year - 1980) << DD_YEAR_SHIFT;
169 }
170 }
171 if (dtp)
172 *dtp = lastdtime;
173 if (dhp)
174 *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000;
175
176 *ddp = lastddate;
177 }
178
179 /*
180 * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that
181 * interval there were 8 regular years and 2 leap years.
182 */
183 #define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60))
184
185 static u_short lastdosdate;
186 static u_long lastseconds;
187
188 /*
189 * Convert from dos' idea of time to unix'. This will probably only be
190 * called from the stat(), and fstat() system calls and so probably need
191 * not be too efficient.
192 */
193 void
194 dos2unixtime(dd, dt, dh, tsp)
195 u_int dd;
196 u_int dt;
197 u_int dh;
198 struct timespec *tsp;
199 {
200 u_long seconds;
201 u_long month;
202 u_long year;
203 u_long days;
204 u_short *months;
205
206 if (dd == 0) {
207 /*
208 * Uninitialized field, return the epoch.
209 */
210 tsp->tv_sec = 0;
211 tsp->tv_nsec = 0;
212 return;
213 }
214 seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1)
215 + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60
216 + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600
217 + dh / 100;
218 /*
219 * If the year, month, and day from the last conversion are the
220 * same then use the saved value.
221 */
222 if (lastdosdate != dd) {
223 lastdosdate = dd;
224 days = 0;
225 year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT;
226 days = year * 365;
227 days += year / 4 + 1; /* add in leap days */
228 if ((year & 0x03) == 0)
229 days--; /* if year is a leap year */
230 months = year & 0x03 ? regyear : leapyear;
231 month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT;
232 if (month < 1 || month > 12) {
233 printf("dos2unixtime(): month value out of range (%ld)\n",
234 month);
235 month = 1;
236 }
237 if (month > 1)
238 days += months[month - 2];
239 days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1;
240 lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980;
241 }
242 tsp->tv_sec = seconds + lastseconds + (tz_minuteswest * 60)
243 + adjkerntz;
244 /* + daylight savings time correction */
245 tsp->tv_nsec = (dh % 100) * 10000000;
246 }
247
248 /*
249 * 0 - character disallowed in long file name.
250 * 1 - character should be replaced by '_' in DOS file name,
251 * and generation number inserted.
252 * 2 - character ('.' and ' ') should be skipped in DOS file name,
253 * and generation number inserted.
254 */
255 static u_char
256 unix2dos[256] = {
257 /* iso8859-1 -> cp850 */
258 0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */
259 0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */
260 0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */
261 0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */
262 2, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
263 0x28, 0x29, 0, 1, 1, 0x2d, 2, 0, /* 28-2f */
264 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
265 0x38, 0x39, 0, 1, 0, 1, 0, 0, /* 38-3f */
266 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
267 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
268 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
269 0x58, 0x59, 0x5a, 1, 0, 1, 0x5e, 0x5f, /* 58-5f */
270 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */
271 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */
272 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */
273 0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */
274 0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */
275 0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */
276 0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */
277 0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */
278 0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */
279 0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */
280 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */
281 0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */
282 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */
283 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */
284 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */
285 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */
286 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */
287 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */
288 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */
289 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */
290 };
291
292 static u_char
293 dos2unix[256] = {
294 /* cp850 -> iso8859-1 */
295 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */
296 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */
297 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */
298 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */
299 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
300 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
301 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
302 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
303 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
304 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
305 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
306 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
307 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
308 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
309 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
310 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
311 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */
312 0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */
313 0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */
314 0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */
315 0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */
316 0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */
317 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */
318 0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */
319 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */
320 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */
321 0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */
322 0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */
323 0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */
324 0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */
325 0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */
326 0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */
327 };
328
329 static u_char
330 u2l[256] = {
331 /* tolower */
332 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
333 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
334 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
335 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
336 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
337 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
338 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
339 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
340 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
341 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
342 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
343 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
344 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
345 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
346 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
347 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
348 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
349 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
350 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
351 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
352 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
353 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
354 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
355 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
356 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
357 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
358 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
359 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
360 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
361 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
362 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
363 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
364 };
365
366 static u_char
367 l2u[256] = {
368 /* toupper */
369 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
370 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
371 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
372 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
373 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
374 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
375 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
376 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
377 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
378 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
379 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
380 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
381 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
382 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
383 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
384 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
385 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
386 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
387 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
388 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
389 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
390 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
391 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
392 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
393 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
394 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
395 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
396 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
397 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
398 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
399 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
400 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
401 };
402
403 /*
404 * DOS filenames are made of 2 parts, the name part and the extension part.
405 * The name part is 8 characters long and the extension part is 3
406 * characters long. They may contain trailing blanks if the name or
407 * extension are not long enough to fill their respective fields.
408 */
409
410 /*
411 * Convert a DOS filename to a unix filename. And, return the number of
412 * characters in the resulting unix filename excluding the terminating
413 * null.
414 */
415 int
416 dos2unixfn(dn, un, lower, pmp)
417 u_char dn[11];
418 u_char *un;
419 int lower;
420 struct msdosfsmount *pmp;
421 {
422 size_t i;
423 int thislong = 0;
424 u_int16_t c;
425
426 /*
427 * If first char of the filename is SLOT_E5 (0x05), then the real
428 * first char of the filename should be 0xe5. But, they couldn't
429 * just have a 0xe5 mean 0xe5 because that is used to mean a freed
430 * directory slot. Another dos quirk.
431 */
432 if (*dn == SLOT_E5)
433 *dn = 0xe5;
434
435 /*
436 * Copy the name portion into the unix filename string.
437 */
438 for (i = 8; i > 0 && *dn != ' ';) {
439 c = dos2unixchr((const u_char **)&dn, &i, lower, pmp);
440 if (c & 0xff00) {
441 *un++ = c >> 8;
442 thislong++;
443 }
444 *un++ = c;
445 thislong++;
446 }
447 dn += i;
448
449 /*
450 * Now, if there is an extension then put in a period and copy in
451 * the extension.
452 */
453 if (*dn != ' ') {
454 *un++ = '.';
455 thislong++;
456 for (i = 3; i > 0 && *dn != ' ';) {
457 c = dos2unixchr((const u_char **)&dn, &i, lower, pmp);
458 if (c & 0xff00) {
459 *un++ = c >> 8;
460 thislong++;
461 }
462 *un++ = c;
463 thislong++;
464 }
465 }
466 *un++ = 0;
467
468 return (thislong);
469 }
470
471 /*
472 * Convert a unix filename to a DOS filename according to Win95 rules.
473 * If applicable and gen is not 0, it is inserted into the converted
474 * filename as a generation number.
475 * Returns
476 * 0 if name couldn't be converted
477 * 1 if the converted name is the same as the original
478 * (no long filename entry necessary for Win95)
479 * 2 if conversion was successful
480 * 3 if conversion was successful and generation number was inserted
481 */
482 int
483 unix2dosfn(un, dn, unlen, gen, pmp)
484 const u_char *un;
485 u_char dn[12];
486 size_t unlen;
487 u_int gen;
488 struct msdosfsmount *pmp;
489 {
490 ssize_t i, j;
491 int l;
492 int conv = 1;
493 const u_char *cp, *dp, *dp1;
494 u_char gentext[6], *wcp;
495 u_int16_t c;
496
497 /*
498 * Fill the dos filename string with blanks. These are DOS's pad
499 * characters.
500 */
501 for (i = 0; i < 11; i++)
502 dn[i] = ' ';
503 dn[11] = 0;
504
505 /*
506 * The filenames "." and ".." are handled specially, since they
507 * don't follow dos filename rules.
508 */
509 if (un[0] == '.' && unlen == 1) {
510 dn[0] = '.';
511 return gen <= 1;
512 }
513 if (un[0] == '.' && un[1] == '.' && unlen == 2) {
514 dn[0] = '.';
515 dn[1] = '.';
516 return gen <= 1;
517 }
518
519 /*
520 * Filenames with only blanks and dots are not allowed!
521 */
522 for (cp = un, i = unlen; --i >= 0; cp++)
523 if (*cp != ' ' && *cp != '.')
524 break;
525 if (i < 0)
526 return 0;
527
528
529 /*
530 * Filenames with some characters are not allowed!
531 */
532 for (cp = un, i = unlen; i > 0;)
533 if (unix2doschr(&cp, (size_t *)&i, pmp) == 0)
534 return 0;
535
536 /*
537 * Now find the extension
538 * Note: dot as first char doesn't start extension
539 * and trailing dots and blanks are ignored
540 * Note(2003/7): It seems recent Windows has
541 * defferent rule than this code, that Windows
542 * ignores all dots before extension, and use all
543 * chars as filename except for dots.
544 */
545 dp = dp1 = 0;
546 for (cp = un + 1, i = unlen - 1; --i >= 0;) {
547 switch (*cp++) {
548 case '.':
549 if (!dp1)
550 dp1 = cp;
551 break;
552 case ' ':
553 break;
554 default:
555 if (dp1)
556 dp = dp1;
557 dp1 = 0;
558 break;
559 }
560 }
561
562 /*
563 * Now convert it (this part is for extension).
564 * As Windows XP do, if it's not ascii char,
565 * this function should return 2 or 3, so that checkng out Unicode name.
566 */
567 if (dp) {
568 if (dp1)
569 l = dp1 - dp;
570 else
571 l = unlen - (dp - un);
572 for (cp = dp, i = l, j = 8; i > 0 && j < 11; j++) {
573 c = unix2doschr(&cp, (size_t *)&i, pmp);
574 if (c & 0xff00) {
575 dn[j] = c >> 8;
576 if (++j < 11) {
577 dn[j] = c;
578 if (conv != 3)
579 conv = 2;
580 continue;
581 } else {
582 conv = 3;
583 dn[j-1] = ' ';
584 break;
585 }
586 } else {
587 dn[j] = c;
588 }
589 if (((dn[j] & 0x80) || *(cp - 1) != dn[j]) && conv != 3)
590 conv = 2;
591 if (dn[j] == 1) {
592 conv = 3;
593 dn[j] = '_';
594 }
595 if (dn[j] == 2) {
596 conv = 3;
597 dn[j--] = ' ';
598 }
599 }
600 if (i > 0)
601 conv = 3;
602 dp--;
603 } else {
604 for (dp = cp; *--dp == ' ' || *dp == '.';);
605 dp++;
606 }
607
608 /*
609 * Now convert the rest of the name
610 */
611 for (i = dp - un, j = 0; un < dp && j < 8; j++) {
612 c = unix2doschr(&un, &i, pmp);
613 if (c & 0xff00) {
614 dn[j] = c >> 8;
615 if (++j < 8) {
616 dn[j] = c;
617 if (conv != 3)
618 conv = 2;
619 continue;
620 } else {
621 conv = 3;
622 dn[j-1] = ' ';
623 break;
624 }
625 } else {
626 dn[j] = c;
627 }
628 if (((dn[j] & 0x80) || *(un - 1) != dn[j]) && conv != 3)
629 conv = 2;
630 if (dn[j] == 1) {
631 conv = 3;
632 dn[j] = '_';
633 }
634 if (dn[j] == 2) {
635 conv = 3;
636 dn[j--] = ' ';
637 }
638 }
639 if (un < dp)
640 conv = 3;
641 /*
642 * If we didn't have any chars in filename,
643 * generate a default
644 */
645 if (!j)
646 dn[0] = '_';
647
648 /*
649 * If there wasn't any char dropped,
650 * there is no place for generation numbers
651 */
652 if (conv != 3) {
653 if (gen > 1)
654 conv = 0;
655 goto done;
656 }
657
658 /*
659 * Now insert the generation number into the filename part
660 */
661 if (gen == 0)
662 goto done;
663 for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
664 *--wcp = gen % 10 + '';
665 if (gen) {
666 conv = 0;
667 goto done;
668 }
669 for (i = 8; dn[--i] == ' ';);
670 i++;
671 if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
672 i = 8 - (gentext + sizeof(gentext) - wcp + 1);
673 /*
674 * Correct posision to where insert the generation number
675 */
676 cp = dn;
677 i -= mbsadjpos((const char**)&cp, i, unlen, 1, pmp->pm_flags, pmp->pm_d2u);
678
679 dn[i++] = '~';
680 while (wcp < gentext + sizeof(gentext))
681 dn[i++] = *wcp++;
682
683 /*
684 * Tail of the filename should be space
685 */
686 while (i < 8)
687 dn[i++] = ' ';
688 conv = 3;
689
690 done:
691 /*
692 * The first character cannot be E5,
693 * because that means a deleted entry
694 */
695 if (dn[0] == 0xe5)
696 dn[0] = SLOT_E5;
697
698 return conv;
699 }
700
701 /*
702 * Create a Win95 long name directory entry
703 * Note: assumes that the filename is valid,
704 * i.e. doesn't consist solely of blanks and dots
705 */
706 int
707 unix2winfn(un, unlen, wep, cnt, chksum, pmp)
708 const u_char *un;
709 size_t unlen;
710 struct winentry *wep;
711 int cnt;
712 int chksum;
713 struct msdosfsmount *pmp;
714 {
715 u_int8_t *wcp;
716 int i, end;
717 u_int16_t code;
718
719 /*
720 * Drop trailing blanks and dots
721 */
722 unlen = winLenFixup(un, unlen);
723
724 /*
725 * Cut *un for this slot
726 */
727 unlen = mbsadjpos((const char **)&un, unlen, (cnt - 1) * WIN_CHARS, 2,
728 pmp->pm_flags, pmp->pm_u2w);
729
730 /*
731 * Initialize winentry to some useful default
732 */
733 for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff);
734 wep->weCnt = cnt;
735 wep->weAttributes = ATTR_WIN95;
736 wep->weReserved1 = 0;
737 wep->weChksum = chksum;
738 wep->weReserved2 = 0;
739
740 /*
741 * Now convert the filename parts
742 */
743 end = 0;
744 for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0 && !end;) {
745 code = unix2winchr(&un, &unlen, 0, pmp);
746 *wcp++ = code;
747 *wcp++ = code >> 8;
748 if (!code)
749 end = WIN_LAST;
750 }
751 for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0 && !end;) {
752 code = unix2winchr(&un, &unlen, 0, pmp);
753 *wcp++ = code;
754 *wcp++ = code >> 8;
755 if (!code)
756 end = WIN_LAST;
757 }
758 for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0 && !end;) {
759 code = unix2winchr(&un, &unlen, 0, pmp);
760 *wcp++ = code;
761 *wcp++ = code >> 8;
762 if (!code)
763 end = WIN_LAST;
764 }
765 if (*un == '\0')
766 end = WIN_LAST;
767 wep->weCnt |= end;
768 return !end;
769 }
770
771 /*
772 * Compare our filename to the one in the Win95 entry
773 * Returns the checksum or -1 if no match
774 */
775 int
776 winChkName(un, unlen, chksum, pmp)
777 const u_char *un;
778 size_t unlen;
779 int chksum;
780 struct msdosfsmount *pmp;
781 {
782 size_t len;
783 u_int16_t c1, c2;
784 u_char *np;
785 struct dirent dirbuf;
786
787 /*
788 * We alread have winentry in mbnambuf
789 */
790 if (!mbnambuf_flush(&dirbuf) || !dirbuf.d_namlen)
791 return -1;
792
793 #ifdef MSDOSFS_DEBUG
794 printf("winChkName(): un=%s:%d,d_name=%s:%d\n", un, unlen,
795 dirbuf.d_name,
796 dirbuf.d_namlen);
797 #endif
798
799 /*
800 * Compare the name parts
801 */
802 len = dirbuf.d_namlen;
803 if (unlen != len)
804 return -2;
805
806 for (np = dirbuf.d_name; unlen > 0 && len > 0;) {
807 /*
808 * Comparison must be case insensitive, because FAT disallows
809 * to look up or create files in case sensitive even when
810 * it's a long file name.
811 */
812 c1 = unix2winchr((const u_char **)&np, &len, LCASE_BASE, pmp);
813 c2 = unix2winchr(&un, &unlen, LCASE_BASE, pmp);
814 if (c1 != c2)
815 return -2;
816 }
817 return chksum;
818 }
819
820 /*
821 * Convert Win95 filename to dirbuf.
822 * Returns the checksum or -1 if impossible
823 */
824 int
825 win2unixfn(wep, chksum, pmp)
826 struct winentry *wep;
827 int chksum;
828 struct msdosfsmount *pmp;
829 {
830 u_int8_t *cp;
831 u_int8_t *np, name[WIN_CHARS * 2 + 1];
832 u_int16_t code;
833 int i;
834
835 if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
836 || !(wep->weCnt&WIN_CNT))
837 return -1;
838
839 /*
840 * First compare checksums
841 */
842 if (wep->weCnt&WIN_LAST) {
843 chksum = wep->weChksum;
844 } else if (chksum != wep->weChksum)
845 chksum = -1;
846 if (chksum == -1)
847 return -1;
848
849 /*
850 * Convert the name parts
851 */
852 np = name;
853 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
854 code = (cp[1] << 8) | cp[0];
855 switch (code) {
856 case 0:
857 *np = '\0';
858 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1);
859 return chksum;
860 case '/':
861 *np = '\0';
862 return -1;
863 default:
864 code = win2unixchr(code, pmp);
865 if (code & 0xff00)
866 *np++ = code >> 8;
867 *np++ = code;
868 break;
869 }
870 cp += 2;
871 }
872 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
873 code = (cp[1] << 8) | cp[0];
874 switch (code) {
875 case 0:
876 *np = '\0';
877 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1);
878 return chksum;
879 case '/':
880 *np = '\0';
881 return -1;
882 default:
883 code = win2unixchr(code, pmp);
884 if (code & 0xff00)
885 *np++ = code >> 8;
886 *np++ = code;
887 break;
888 }
889 cp += 2;
890 }
891 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
892 code = (cp[1] << 8) | cp[0];
893 switch (code) {
894 case 0:
895 *np = '\0';
896 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1);
897 return chksum;
898 case '/':
899 *np = '\0';
900 return -1;
901 default:
902 code = win2unixchr(code, pmp);
903 if (code & 0xff00)
904 *np++ = code >> 8;
905 *np++ = code;
906 break;
907 }
908 cp += 2;
909 }
910 *np = '\0';
911 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1);
912 return chksum;
913 }
914
915 /*
916 * Compute the unrolled checksum of a DOS filename for Win95 LFN use.
917 */
918 u_int8_t
919 winChksum(name)
920 u_int8_t *name;
921 {
922 u_int8_t s;
923
924 s = name[0];
925 s = ((s << 7) | (s >> 1)) + name[1];
926 s = ((s << 7) | (s >> 1)) + name[2];
927 s = ((s << 7) | (s >> 1)) + name[3];
928 s = ((s << 7) | (s >> 1)) + name[4];
929 s = ((s << 7) | (s >> 1)) + name[5];
930 s = ((s << 7) | (s >> 1)) + name[6];
931 s = ((s << 7) | (s >> 1)) + name[7];
932 s = ((s << 7) | (s >> 1)) + name[8];
933 s = ((s << 7) | (s >> 1)) + name[9];
934 s = ((s << 7) | (s >> 1)) + name[10];
935
936 return (s);
937 }
938
939 /*
940 * Determine the number of slots necessary for Win95 names
941 */
942 int
943 winSlotCnt(un, unlen, pmp)
944 const u_char *un;
945 size_t unlen;
946 struct msdosfsmount *pmp;
947 {
948 size_t wlen;
949 char wn[WIN_MAXLEN * 2 + 1], *wnp;
950
951 unlen = winLenFixup(un, unlen);
952
953 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
954 wlen = WIN_MAXLEN * 2;
955 wnp = wn;
956 msdosfs_iconv->conv(pmp->pm_u2w, (const char **)&un, &unlen, &wnp, &wlen);
957 if (unlen > 0)
958 return 0;
959 return howmany(WIN_MAXLEN - wlen/2, WIN_CHARS);
960 }
961
962 if (unlen > WIN_MAXLEN)
963 return 0;
964 return howmany(unlen, WIN_CHARS);
965 }
966
967 /*
968 * Determine the number of bytes neccesary for Win95 names
969 */
970 size_t
971 winLenFixup(un, unlen)
972 const u_char* un;
973 size_t unlen;
974 {
975 for (un += unlen; unlen > 0; unlen--)
976 if (*--un != ' ' && *un != '.')
977 break;
978 return unlen;
979 }
980
981 /*
982 * Store an area with multi byte string instr, and reterns left
983 * byte of instr and moves pointer forward. The area's size is
984 * inlen or outlen.
985 */
986 static int
987 mbsadjpos(const char **instr, size_t inlen, size_t outlen, int weight, int flag, void *handle)
988 {
989 char *outp, outstr[outlen * weight + 1];
990
991 if (flag & MSDOSFSMNT_KICONV && msdosfs_iconv) {
992 outp = outstr;
993 outlen *= weight;
994 msdosfs_iconv->conv(handle, instr, &inlen, &outp, &outlen);
995 return (inlen);
996 }
997
998 (*instr) += min(inlen, outlen);
999 return (inlen - min(inlen, outlen));
1000 }
1001
1002 /*
1003 * Convert DOS char to Local char
1004 */
1005 static u_int16_t
1006 dos2unixchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
1007 {
1008 u_char c;
1009 char *outp, outbuf[3];
1010 u_int16_t wc;
1011 size_t len, olen;
1012
1013 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
1014 olen = len = 2;
1015 outp = outbuf;
1016
1017 if (lower & (LCASE_BASE | LCASE_EXT))
1018 msdosfs_iconv->convchr_case(pmp->pm_d2u, (const char **)instr,
1019 ilen, &outp, &olen, KICONV_LOWER);
1020 else
1021 msdosfs_iconv->convchr(pmp->pm_d2u, (const char **)instr,
1022 ilen, &outp, &olen);
1023 len -= olen;
1024
1025 /*
1026 * return '?' if failed to convert
1027 */
1028 if (len == 0) {
1029 (*ilen)--;
1030 (*instr)++;
1031 return ('?');
1032 }
1033
1034 wc = 0;
1035 while(len--)
1036 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
1037 return (wc);
1038 }
1039
1040 (*ilen)--;
1041 c = *(*instr)++;
1042 c = dos2unix[c];
1043 if (lower & (LCASE_BASE | LCASE_EXT))
1044 c = u2l[c];
1045 return ((u_int16_t)c);
1046 }
1047
1048 /*
1049 * Convert Local char to DOS char
1050 */
1051 static u_int16_t
1052 unix2doschr(const u_char **instr, size_t *ilen, struct msdosfsmount *pmp)
1053 {
1054 u_char c;
1055 char *up, *outp, unicode[3], outbuf[3];
1056 u_int16_t wc;
1057 size_t len, ucslen, unixlen, olen;
1058
1059 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
1060 /*
1061 * to hide an invisible character, using a unicode filter
1062 */
1063 ucslen = 2;
1064 len = *ilen;
1065 up = unicode;
1066 msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
1067 ilen, &up, &ucslen);
1068 unixlen = len - *ilen;
1069
1070 /*
1071 * cannot be converted
1072 */
1073 if (unixlen == 0) {
1074 (*ilen)--;
1075 (*instr)++;
1076 return (0);
1077 }
1078
1079 /*
1080 * return magic number for ascii char
1081 */
1082 if (unixlen == 1) {
1083 c = *(*instr -1);
1084 if (! (c & 0x80)) {
1085 c = unix2dos[c];
1086 if (c <= 2)
1087 return (c);
1088 }
1089 }
1090
1091 /*
1092 * now convert using libiconv
1093 */
1094 *instr -= unixlen;
1095 *ilen = len;
1096
1097 olen = len = 2;
1098 outp = outbuf;
1099 msdosfs_iconv->convchr_case(pmp->pm_u2d, (const char **)instr,
1100 ilen, &outp, &olen, KICONV_FROM_UPPER);
1101 len -= olen;
1102
1103 /*
1104 * cannot be converted, but has unicode char, should return magic number
1105 */
1106 if (len == 0) {
1107 (*ilen) -= unixlen;
1108 (*instr) += unixlen;
1109 return (1);
1110 }
1111
1112 wc = 0;
1113 while(len--)
1114 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
1115 return (wc);
1116 }
1117
1118 (*ilen)--;
1119 c = *(*instr)++;
1120 c = l2u[c];
1121 c = unix2dos[c];
1122 return ((u_int16_t)c);
1123 }
1124
1125 /*
1126 * Convert Windows char to Local char
1127 */
1128 static u_int16_t
1129 win2unixchr(u_int16_t wc, struct msdosfsmount *pmp)
1130 {
1131 u_char *inp, *outp, inbuf[3], outbuf[3];
1132 size_t ilen, olen, len;
1133
1134 if (wc == 0)
1135 return (0);
1136
1137 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
1138 inbuf[0] = (u_char)(wc>>8);
1139 inbuf[1] = (u_char)wc;
1140 inbuf[2] = '\0';
1141
1142 ilen = olen = len = 2;
1143 inp = inbuf;
1144 outp = outbuf;
1145 msdosfs_iconv->convchr(pmp->pm_w2u, (const char **)&inp, &ilen,
1146 (char **)&outp, &olen);
1147 len -= olen;
1148
1149 /*
1150 * return '?' if failed to convert
1151 */
1152 if (len == 0) {
1153 wc = '?';
1154 return (wc);
1155 }
1156
1157 wc = 0;
1158 while(len--)
1159 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
1160 return (wc);
1161 }
1162
1163 if (wc & 0xff00)
1164 wc = '?';
1165
1166 return (wc);
1167 }
1168
1169 /*
1170 * Convert Local char to Windows char
1171 */
1172 static u_int16_t
1173 unix2winchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
1174 {
1175 u_char *outp, outbuf[3];
1176 u_int16_t wc;
1177 size_t olen;
1178
1179 if (*ilen == 0)
1180 return (0);
1181
1182 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
1183 outp = outbuf;
1184 olen = 2;
1185 if (lower & (LCASE_BASE | LCASE_EXT))
1186 msdosfs_iconv->convchr_case(pmp->pm_u2w, (const char **)instr,
1187 ilen, (char **)&outp, &olen,
1188 KICONV_FROM_LOWER);
1189 else
1190 msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
1191 ilen, (char **)&outp, &olen);
1192
1193 /*
1194 * return '' if end of filename
1195 */
1196 if (olen == 2)
1197 return (0);
1198
1199 wc = (outbuf[0]<<8) | outbuf[1];
1200
1201 return (wc);
1202 }
1203
1204 (*ilen)--;
1205 wc = (*instr)[0];
1206 if (lower & (LCASE_BASE | LCASE_EXT))
1207 wc = u2l[wc];
1208 (*instr)++;
1209 return (wc);
1210 }
1211
1212 /*
1213 * Initialize the temporary concatenation buffer (once) and mark it as
1214 * empty on subsequent calls.
1215 */
1216 void
1217 mbnambuf_init(void)
1218 {
1219
1220 if (nambuf_ptr == NULL) {
1221 nambuf_ptr = malloc(MAXNAMLEN + 1, M_MSDOSFSMNT, M_WAITOK);
1222 nambuf_ptr[MAXNAMLEN] = '\0';
1223 }
1224 nambuf_len = 0;
1225 nambuf_last_id = -1;
1226 }
1227
1228 /*
1229 * Fill out our concatenation buffer with the given substring, at the offset
1230 * specified by its id. Since this function must be called with ids in
1231 * descending order, we take advantage of the fact that ASCII substrings are
1232 * exactly WIN_CHARS in length. For non-ASCII substrings, we shift all
1233 * previous (i.e. higher id) substrings upwards to make room for this one.
1234 * This only penalizes portions of substrings that contain more than
1235 * WIN_CHARS bytes when they are first encountered.
1236 */
1237 void
1238 mbnambuf_write(char *name, int id)
1239 {
1240 size_t count;
1241 char *slot;
1242
1243 KASSERT(nambuf_len == 0 || id == nambuf_last_id - 1,
1244 ("non-decreasing id, id %d last id %d", id, nambuf_last_id));
1245
1246 /* Store this substring in a WIN_CHAR-aligned slot. */
1247 slot = nambuf_ptr + (id * WIN_CHARS);
1248 count = strlen(name);
1249 if (nambuf_len + count > MAXNAMLEN) {
1250 printf("msdosfs: file name %zu too long\n", nambuf_len + count);
1251 return;
1252 }
1253
1254 /* Shift suffix upwards by the amount length exceeds WIN_CHARS. */
1255 if (count > WIN_CHARS && nambuf_len != 0)
1256 bcopy(slot + WIN_CHARS, slot + count, nambuf_len);
1257
1258 /* Copy in the substring to its slot and update length so far. */
1259 bcopy(name, slot, count);
1260 nambuf_len += count;
1261 nambuf_last_id = id;
1262 }
1263
1264 /*
1265 * Take the completed string and use it to setup the struct dirent.
1266 * Be sure to always nul-terminate the d_name and then copy the string
1267 * from our buffer. Note that this function assumes the full string has
1268 * been reassembled in the buffer. If it's called before all substrings
1269 * have been written via mbnambuf_write(), the result will be incorrect.
1270 */
1271 char *
1272 mbnambuf_flush(struct dirent *dp)
1273 {
1274
1275 if (nambuf_len > sizeof(dp->d_name) - 1) {
1276 mbnambuf_init();
1277 return (NULL);
1278 }
1279 bcopy(nambuf_ptr, dp->d_name, nambuf_len);
1280 dp->d_name[nambuf_len] = '\0';
1281 dp->d_namlen = nambuf_len;
1282
1283 mbnambuf_init();
1284 return (dp->d_name);
1285 }
Cache object: d20854bcff6f1fc19f498dabafab30b4
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