1 /* $FreeBSD: src/sys/msdosfs/msdosfs_conv.c,v 1.29.2.1 2002/11/08 22:01:22 semenu Exp $ */
2 /* $DragonFly: src/sys/vfs/msdosfs/msdosfs_conv.c,v 1.7 2006/12/23 00:41:29 swildner Exp $ */
3 /* $NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $ */
6 * Copyright (C) 1995, 1997 Wolfgang Solfrank.
7 * Copyright (C) 1995, 1997 TooLs GmbH.
9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by TooLs GmbH.
22 * 4. The name of TooLs GmbH may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * Written by Paul Popelka (paulp@uts.amdahl.com)
39 * You can do anything you want with this software, just don't say you wrote
40 * it, and don't remove this notice.
42 * This software is provided "as is".
44 * The author supplies this software to be publicly redistributed on the
45 * understanding that the author is not responsible for the correct
46 * functioning of this software in any circumstances and is not liable for
47 * any damages caused by this software.
53 * System include files.
55 #include <sys/param.h>
57 #include <sys/kernel.h> /* defines tz */
58 #include <sys/systm.h>
59 #include <sys/iconv.h>
60 #include <machine/clock.h>
61 #include <sys/dirent.h>
62 #include <sys/mount.h>
64 * MSDOSFS include files.
67 #include "msdosfsmount.h"
70 extern struct iconv_functions *msdos_iconv;
73 * Total number of days that have passed for each month in a regular year.
75 static u_short regyear[] = {
76 31, 59, 90, 120, 151, 181,
77 212, 243, 273, 304, 334, 365
81 * Total number of days that have passed for each month in a leap year.
83 static u_short leapyear[] = {
84 31, 60, 91, 121, 152, 182,
85 213, 244, 274, 305, 335, 366
89 * Variables used to remember parts of the last time conversion. Maybe we
90 * can avoid a full conversion.
92 static u_long lasttime;
93 static u_long lastday;
94 static u_short lastddate;
95 static u_short lastdtime;
97 static __inline u_int8_t find_lcode (u_int16_t code, u_int16_t *u2w);
100 * Convert the unix version of time to dos's idea of time to be used in
101 * file timestamps. The passed in unix time is assumed to be in GMT.
104 unix2dostime(struct timespec *tsp, u_int16_t *ddp, u_int16_t *dtp, u_int8_t *dhp)
114 * If the time from the last conversion is the same as now, then
115 * skip the computations and use the saved result.
117 t = tsp->tv_sec - (tz.tz_minuteswest * 60)
118 - (wall_cmos_clock ? adjkerntz : 0);
119 /* - daylight savings time correction */
123 lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT)
124 + (((t / 60) % 60) << DT_MINUTES_SHIFT)
125 + (((t / 3600) % 24) << DT_HOURS_SHIFT);
128 * If the number of days since 1970 is the same as the last
129 * time we did the computation then skip all this leap year
132 days = t / (24 * 60 * 60);
133 if (days != lastday) {
135 for (year = 1970;; year++) {
136 inc = year & 0x03 ? 365 : 366;
141 months = year & 0x03 ? regyear : leapyear;
142 for (month = 0; days >= months[month]; month++)
145 days -= months[month - 1];
146 lastddate = ((days + 1) << DD_DAY_SHIFT)
147 + ((month + 1) << DD_MONTH_SHIFT);
149 * Remember dos's idea of time is relative to 1980.
150 * unix's is relative to 1970. If somehow we get a
151 * time before 1980 then don't give totally crazy
155 lastddate += (year - 1980) << DD_YEAR_SHIFT;
161 *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000;
167 * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that
168 * interval there were 8 regular years and 2 leap years.
170 #define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60))
172 static u_short lastdosdate;
173 static u_long lastseconds;
176 * Initialize the temporary concatenation buffer.
179 mbnambuf_init(struct mbnambuf *nbp)
182 nbp->nb_last_id = -1;
183 nbp->nb_buf[sizeof(nbp->nb_buf) - 1] = '\0';
186 * Fill out our concatenation buffer with the given substring, at the offset
187 * specified by its id. Since this function must be called with ids in
188 * descending order, we take advantage of the fact that ASCII substrings are
189 * exactly WIN_CHARS in length. For non-ASCII substrings, we shift all
190 * previous (i.e. higher id) substrings upwards to make room for this one.
191 * This only penalizes portions of substrings that contain more than
192 * WIN_CHARS bytes when they are first encountered.
195 mbnambuf_write(struct mbnambuf *nbp, char *name, int id)
198 size_t count, newlen;
199 if (nbp->nb_len != 0 && id != nbp->nb_last_id - 1) {
200 kprintf("msdosfs: non-decreasing id: id %d, last id %d\n",
201 id, nbp->nb_last_id);
204 /* Will store this substring in a WIN_CHARS-aligned slot. */
205 slot = &nbp->nb_buf[id * WIN_CHARS];
206 count = strlen(name);
207 newlen = nbp->nb_len + count;
208 if (newlen > WIN_MAXLEN || newlen > 127) {
209 kprintf("msdosfs: file name length %zu too large\n", newlen);
212 /* Shift suffix upwards by the amount length exceeds WIN_CHARS. */
213 if (count > WIN_CHARS && nbp->nb_len != 0)
214 bcopy(slot + WIN_CHARS, slot + count, nbp->nb_len);
215 /* Copy in the substring to its slot and update length so far. */
216 bcopy(name, slot, count);
217 nbp->nb_len = newlen;
218 nbp->nb_last_id = id;
221 * Take the completed string and use it to setup the struct dirent.
222 * Be sure to always nul-terminate the d_name and then copy the string
223 * from our buffer. Note that this function assumes the full string has
224 * been reassembled in the buffer. If it's called before all substrings
225 * have been written via mbnambuf_write(), the result will be incorrect.
228 mbnambuf_flush(struct mbnambuf *nbp, char *d_name, u_int16_t *d_namlen)
231 if (nbp->nb_len > 127) {
236 bcopy(&nbp->nb_buf[0], d_name, nbp->nb_len);
237 d_name[nbp->nb_len] = '\0';
238 *d_namlen = nbp->nb_len;
244 * Convert from dos' idea of time to unix'. This will probably only be
245 * called from the stat(), and fstat() system calls and so probably need
246 * not be too efficient.
249 dos2unixtime(u_int dd, u_int dt, u_int dh, struct timespec *tsp)
259 * Uninitialized field, return the epoch.
265 seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1)
266 + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60
267 + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600
270 * If the year, month, and day from the last conversion are the
271 * same then use the saved value.
273 if (lastdosdate != dd) {
276 year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT;
278 days += year / 4 + 1; /* add in leap days */
279 if ((year & 0x03) == 0)
280 days--; /* if year is a leap year */
281 months = year & 0x03 ? regyear : leapyear;
282 month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT;
283 if (month < 1 || month > 12) {
284 kprintf("dos2unixtime(): month value out of range (%ld)\n",
289 days += months[month - 2];
290 days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1;
291 lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980;
293 tsp->tv_sec = seconds + lastseconds + (tz.tz_minuteswest * 60)
295 /* + daylight savings time correction */
296 tsp->tv_nsec = (dh % 100) * 10000000;
300 * 0 - character disallowed in long file name.
301 * 1 - character should be replaced by '_' in DOS file name,
302 * and generation number inserted.
303 * 2 - character ('.' and ' ') should be skipped in DOS file name,
304 * and generation number inserted.
308 0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */
309 0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */
310 0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */
311 0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */
312 2, 0x21, 0, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
313 0x28, 0x29, 0, 1, 1, 0x2d, 2, 0, /* 28-2f */
314 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
315 0x38, 0x39, 0, 1, 0, 1, 0, 0, /* 38-3f */
316 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
317 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
318 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
319 0x58, 0x59, 0x5a, 1, 0, 1, 0x5e, 0x5f, /* 58-5f */
320 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 60-67 */
321 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 68-6f */
322 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 70-77 */
323 0x58, 0x59, 0x5a, 0x7b, 0, 0x7d, 0x7e, 0, /* 78-7f */
324 0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */
325 0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */
326 0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */
327 0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */
328 0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */
329 0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */
330 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */
331 0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */
332 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */
333 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */
334 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */
335 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */
336 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */
337 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */
338 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */
339 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */
344 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 00-07 */
345 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 08-0f */
346 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 10-17 */
347 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, /* 18-1f */
348 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
349 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
350 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
351 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
352 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 40-47 */
353 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 48-4f */
354 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 50-57 */
355 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
356 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
357 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
358 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
359 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
360 0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7, /* 80-87 */
361 0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5, /* 88-8f */
362 0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9, /* 90-97 */
363 0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f, /* 98-9f */
364 0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba, /* a0-a7 */
365 0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb, /* a8-af */
366 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0, /* b0-b7 */
367 0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f, /* b8-bf */
368 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3, /* c0-c7 */
369 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4, /* c8-cf */
370 0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce, /* d0-d7 */
371 0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f, /* d8-df */
372 0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe, /* e0-e7 */
373 0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f, /* e8-ef */
374 0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8, /* f0-f7 */
375 0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f, /* f8-ff */
380 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
381 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
382 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
383 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
384 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
385 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
386 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
387 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
388 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
389 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
390 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
391 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
392 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
393 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
394 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
395 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
396 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
397 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
398 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
399 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
400 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
401 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
402 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
403 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
404 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
405 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
406 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
407 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
408 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
409 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
410 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
411 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
416 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
417 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
418 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
419 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
420 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
421 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
422 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
423 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
424 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
425 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
426 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
427 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
428 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
429 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
430 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
431 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
432 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
433 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
434 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
435 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
436 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
437 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
438 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
439 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
440 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
441 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
442 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
443 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
444 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
445 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
446 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
447 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
451 * Convert DOS char to Local char
454 dos2unixchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *
458 char *outp, outbuf[3];
461 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdos_iconv) {
464 if (lower & (LCASE_BASE | LCASE_EXT))
465 msdos_iconv->convchr_case(pmp->pm_d2u, (const char **)instr,
466 ilen, &outp, &olen, KICONV_LOWER);
468 msdos_iconv->convchr(pmp->pm_d2u, (const char **)instr,
472 * return '?' if failed to convert
481 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
487 if (lower & (LCASE_BASE | LCASE_EXT))
489 return ((u_int16_t)c);
493 * DOS filenames are made of 2 parts, the name part and the extension part.
494 * The name part is 8 characters long and the extension part is 3
495 * characters long. They may contain trailing blanks if the name or
496 * extension are not long enough to fill their respective fields.
500 * Convert a DOS filename to a unix filename. And, return the number of
501 * characters in the resulting unix filename excluding the terminating
505 dos2unixfn(u_char dn[11], u_char *un, int lower, struct msdosfsmount *pmp)
512 * If first char of the filename is SLOT_E5 (0x05), then the real
513 * first char of the filename should be 0xe5. But, they couldn't
514 * just have a 0xe5 mean 0xe5 because that is used to mean a freed
515 * directory slot. Another dos quirk.
520 * Copy the name portion into the unix filename string.
522 for(i = 8; i > 0 && *dn != ' ';) {
523 c = dos2unixchr((const u_char **)&dn, &i, lower & LCASE_BASE,
535 * Now, if there is an extension then put in a period and copy in
541 for (i = 3; i > 0 && *dn != ' ';) {
542 c = dos2unixchr((const u_char **)&dn, &i,
543 lower & LCASE_EXT, pmp);
554 for(i = 0; un[i] != 0; i++)
555 kprintf("0x%x", un[i]);
556 kprintf(" ->%s\n", dn);
562 * Store an area with multi byte string instr, and reterns left
563 * byte of instr and moves pointer forward. The area's size is
567 mbsadjpos(const char **instr, size_t inlen, size_t outlen, int weight, int flag,
570 char *outp, outstr[outlen * weight + 1];
571 bzero(outstr, outlen*weight+1);
572 if (flag & MSDOSFSMNT_KICONV && msdos_iconv) {
575 msdos_iconv->conv(handle, instr, &inlen, &outp, &outlen);
578 (*instr) += min(inlen, outlen);
579 return (inlen - min(inlen, outlen));
583 * Convert Local char to DOS char
586 unix2doschr(const u_char **instr, size_t *ilen, struct msdosfsmount *pmp)
589 char *up, *outp, unicode[3], outbuf[3];
591 size_t len, ucslen, unixlen, olen;
592 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdos_iconv) {
594 * to hide an invisible character, using a unicode filter
599 msdos_iconv->convchr(pmp->pm_u2w, (const char **)instr,
601 unixlen = len - *ilen;
604 * cannot be converted
612 * return magic number for ascii char
623 * now convert using libiconv
629 msdos_iconv->convchr_case(pmp->pm_u2d, (const char **)instr,
630 ilen, &outp, &olen, KICONV_FROM_UPPER);
633 * cannot be converted, but has unicode char, should return magic number
642 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
649 return ((u_int16_t)c);
653 * Convert a unix filename to a DOS filename according to Win95 rules.
654 * If applicable and gen is not 0, it is inserted into the converted
655 * filename as a generation number.
657 * 0 if name couldn't be converted
658 * 1 if the converted name is the same as the original
659 * (no long filename entry necessary for Win95)
660 * 2 if conversion was successful
661 * 3 if conversion was successful and generation number was inserted
665 unix2dosfn(const u_char *un, u_char dn[12], int unlen, u_int gen, struct msdosfsmount *pmp)
670 const u_char *cp, *dp, *dp1;
671 u_char gentext[6], *wcp;
674 * Fill the dos filename string with blanks. These are DOS's pad
677 for (i = 0; i < 11; i++)
681 * The filenames "." and ".." are handled specially, since they
682 * don't follow dos filename rules.
684 if (un[0] == '.' && unlen == 1) {
688 if (un[0] == '.' && un[1] == '.' && unlen == 2) {
694 * Filenames with only blanks and dots are not allowed!
696 for (cp = un, i = unlen; --i >= 0; cp++)
697 if (*cp != ' ' && *cp != '.')
702 * Filenames with some characters are not allowed!
704 for (cp = un, i = unlen; i > 0;)
705 if (unix2doschr(&cp, (size_t *)&i, pmp) == 0)
708 * Now find the extension
709 * Note: dot as first char doesn't start extension
710 * and trailing dots and blanks are ignored
711 * Note(2003/7): It seems recent Windows has
712 * defferent rule than this code, that Windows
713 * ignores all dots before extension, and use all
714 * chars as filename except for dots.
717 for (cp = un + 1, i = unlen - 1; --i >= 0;) {
733 * Now convert it (this part is for extension).
734 * As Windows XP do, if it's not ascii char,
735 * this function should return 2 or 3, so that checkng out Unicode name.
741 l = unlen - (dp - un);
742 for (cp = dp, i = l, j = 8; i > 0 && j < 11; j++) {
743 c = unix2doschr(&cp, (size_t *)&i, pmp);
759 if (((dn[j] & 0x80) || *(cp - 1) != dn[j]) && conv != 3)
774 for (dp = cp; *--dp == ' ' || *dp == '.';);
778 * Now convert the rest of the name
780 for (i = dp - un, j = 0; un < dp && j < 8; j++) {
781 c = unix2doschr(&un, &i, pmp);
797 if (((dn[j] & 0x80) || *(un - 1) != dn[j]) && conv != 3)
811 * If we didn't have any chars in filename,
817 * If there wasn't any char dropped,
818 * there is no place for generation numbers
826 * Now insert the generation number into the filename part
830 for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
831 *--wcp = gen % 10 + '0';
836 for (i = 8; dn[--i] == ' ';);
838 if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
839 i = 8 - (gentext + sizeof(gentext) - wcp + 1);
841 * Correct posision to where insert the generation number
844 i -= mbsadjpos((const char**)&cp, i, unlen, 1, pmp->pm_flags, pmp->pm_d2u);
846 while (wcp < gentext + sizeof(gentext))
849 * Tail of the filename should be space
856 * The first character cannot be E5,
857 * because that means a deleted entry
865 * Convert Local char to Windows char
868 unix2winchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *
871 u_char *outp, outbuf[3];
876 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdos_iconv) {
879 if (lower & (LCASE_BASE | LCASE_EXT))
880 msdos_iconv->convchr_case(pmp->pm_u2w, (const char **)
882 ilen, (char **)&outp, &olen,
885 msdos_iconv->convchr(pmp->pm_u2w, (const char **)instr,
886 ilen, (char **)&outp, &olen);
888 * return '0' if end of filename
892 wc = (outbuf[0]<<8) | outbuf[1];
897 if (lower & (LCASE_BASE | LCASE_EXT))
904 * Create a Win95 long name directory entry
905 * Note: assumes that the filename is valid,
906 * i.e. doesn't consist solely of blanks and dots
909 unix2winfn(const u_char *un, int unlen, struct winentry *wep, int cnt, int chksum, struct msdosfsmount *pmp)
916 * Drop trailing blanks and dots
918 unlen = winLenFixup(un, unlen);
921 * Cut *un for this slot
923 unlen = mbsadjpos((const char **)&un, unlen, (cnt - 1) * WIN_CHARS, 2,
924 pmp->pm_flags, pmp->pm_u2w);
927 * Initialize winentry to some useful default
929 for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff);
931 wep->weAttributes = ATTR_WIN95;
932 wep->weReserved1 = 0;
933 wep->weChksum = chksum;
934 wep->weReserved2 = 0;
937 * Now convert the filename parts
940 for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0 && !end;)
942 code = unix2winchr(&un, &unlen, 0, pmp);
948 for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0 && !end;)
950 code = unix2winchr(&un, &unlen, 0, pmp);
956 for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0 && !end;)
958 code = unix2winchr(&un, &unlen, 0, pmp);
970 static __inline u_int8_t
971 find_lcode(u_int16_t code, u_int16_t *u2w)
975 for (i = 0; i < 128; i++)
982 * Compare our filename to the one in the Win95 entry
983 * Returns the checksum or -1 if no match
986 winChkName(struct mbnambuf *nbp, const u_char *un, size_t unlen, int chksum,
987 struct msdosfsmount *pmp)
996 * We already have winentry in *nbp.
998 if (!mbnambuf_flush(nbp, d_name, &d_namlen) || d_namlen == 0)
1000 #ifdef MSDOSFS_DEBUG
1001 kprintf("winChkName(): un=%s:%d,d_name=%s:%d\n", un, unlen,
1006 * Compare the name parts
1011 for (np = d_name; unlen > 0 && len > 0;) {
1013 * Comparison must be case insensitive, because FAT disallows
1014 * to look up or create files in case sensitive even when
1015 * it's a long file name.
1017 c1 = unix2winchr((const u_char **)&np, &len, LCASE_BASE, pmp);
1018 c2 = unix2winchr(&un, &unlen, LCASE_BASE, pmp);
1026 * Convert Windows char to Local char
1029 win2unixchr(u_int16_t wc, struct msdosfsmount *pmp)
1031 u_char *inp, *outp, inbuf[3], outbuf[3];
1032 size_t ilen, olen, len;
1035 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdos_iconv) {
1036 inbuf[0] = (u_char)(wc>>8);
1037 inbuf[1] = (u_char)wc;
1039 ilen = olen = len = 2;
1042 msdos_iconv->convchr(pmp->pm_w2u, (const char **)&inp, &ilen,
1043 (char **)&outp, &olen);
1047 * return '?' if failed to convert
1055 wc |= (*(outp - len - 1) & 0xff) << (len << 3);
1064 * Convert Win95 filename to dirbuf.
1065 * Returns the checksum or -1 if impossible
1068 win2unixfn(struct mbnambuf *nbp, struct winentry *wep, int chksum,
1069 struct msdosfsmount *pmp)
1072 u_int8_t *np, name[WIN_CHARS * 2 + 1];
1075 if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
1076 || !(wep->weCnt&WIN_CNT))
1079 * First compare checksums
1081 if (wep->weCnt&WIN_LAST) {
1082 chksum = wep->weChksum;
1083 } else if (chksum != wep->weChksum)
1088 * Convert the name parts
1091 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
1092 code = (cp[1] << 8) | cp[0];
1096 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
1102 code = win2unixchr(code, pmp);
1110 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
1111 code = (cp[1] << 8) | cp[0];
1115 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
1121 code = win2unixchr(code, pmp);
1129 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
1130 code = (cp[1] << 8) | cp[0];
1134 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
1140 code = win2unixchr(code, pmp);
1149 mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1);
1153 * Compute the checksum of a DOS filename for Win95 use
1156 winChksum(u_int8_t *name)
1161 for (s = 0, i = 11; --i >= 0; s += *name++)
1162 s = (s << 7)|(s >> 1);
1167 * Determine the number of slots necessary for Win95 names
1170 winSlotCnt(const u_char *un, int unlen, struct msdosfsmount *pmp)
1173 char wn[WIN_MAXLEN * 2 + 1], *wnp;
1174 unlen = winLenFixup(un, unlen);
1175 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdos_iconv) {
1176 wlen = WIN_MAXLEN * 2;
1178 msdos_iconv->conv(pmp->pm_u2w, (const char **)&un, &unlen, &wnp, &wlen);
1181 return howmany(WIN_MAXLEN - wlen/2, WIN_CHARS);
1183 if (unlen > WIN_MAXLEN)
1185 return howmany(unlen, WIN_CHARS);
1189 * Determine the number of bytes neccesary for Win95 names
1192 winLenFixup(const u_char *un, int unlen)
1194 for (un += unlen; unlen > 0; unlen--)
1195 if (*--un != ' ' && *un != '.')