Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/fs/msdosfs/msdosfs_conv.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* $FreeBSD$ */ 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 & LCASE_BASE, 440 pmp); 441 if (c & 0xff00) { 442 *un++ = c >> 8; 443 thislong++; 444 } 445 *un++ = c; 446 thislong++; 447 } 448 dn += i; 449 450 /* 451 * Now, if there is an extension then put in a period and copy in 452 * the extension. 453 */ 454 if (*dn != ' ') { 455 *un++ = '.'; 456 thislong++; 457 for (i = 3; i > 0 && *dn != ' ';) { 458 c = dos2unixchr((const u_char **)&dn, &i, 459 lower & LCASE_EXT, pmp); 460 if (c & 0xff00) { 461 *un++ = c >> 8; 462 thislong++; 463 } 464 *un++ = c; 465 thislong++; 466 } 467 } 468 *un++ = 0; 469 470 return (thislong); 471 } 472 473 /* 474 * Convert a unix filename to a DOS filename according to Win95 rules. 475 * If applicable and gen is not 0, it is inserted into the converted 476 * filename as a generation number. 477 * Returns 478 * 0 if name couldn't be converted 479 * 1 if the converted name is the same as the original 480 * (no long filename entry necessary for Win95) 481 * 2 if conversion was successful 482 * 3 if conversion was successful and generation number was inserted 483 */ 484 int 485 unix2dosfn(un, dn, unlen, gen, pmp) 486 const u_char *un; 487 u_char dn[12]; 488 size_t unlen; 489 u_int gen; 490 struct msdosfsmount *pmp; 491 { 492 ssize_t i, j; 493 int l; 494 int conv = 1; 495 const u_char *cp, *dp, *dp1; 496 u_char gentext[6], *wcp; 497 u_int16_t c; 498 499 /* 500 * Fill the dos filename string with blanks. These are DOS's pad 501 * characters. 502 */ 503 for (i = 0; i < 11; i++) 504 dn[i] = ' '; 505 dn[11] = 0; 506 507 /* 508 * The filenames "." and ".." are handled specially, since they 509 * don't follow dos filename rules. 510 */ 511 if (un[0] == '.' && unlen == 1) { 512 dn[0] = '.'; 513 return gen <= 1; 514 } 515 if (un[0] == '.' && un[1] == '.' && unlen == 2) { 516 dn[0] = '.'; 517 dn[1] = '.'; 518 return gen <= 1; 519 } 520 521 /* 522 * Filenames with only blanks and dots are not allowed! 523 */ 524 for (cp = un, i = unlen; --i >= 0; cp++) 525 if (*cp != ' ' && *cp != '.') 526 break; 527 if (i < 0) 528 return 0; 529 530 531 /* 532 * Filenames with some characters are not allowed! 533 */ 534 for (cp = un, i = unlen; i > 0;) 535 if (unix2doschr(&cp, (size_t *)&i, pmp) == 0) 536 return 0; 537 538 /* 539 * Now find the extension 540 * Note: dot as first char doesn't start extension 541 * and trailing dots and blanks are ignored 542 * Note(2003/7): It seems recent Windows has 543 * defferent rule than this code, that Windows 544 * ignores all dots before extension, and use all 545 * chars as filename except for dots. 546 */ 547 dp = dp1 = 0; 548 for (cp = un + 1, i = unlen - 1; --i >= 0;) { 549 switch (*cp++) { 550 case '.': 551 if (!dp1) 552 dp1 = cp; 553 break; 554 case ' ': 555 break; 556 default: 557 if (dp1) 558 dp = dp1; 559 dp1 = 0; 560 break; 561 } 562 } 563 564 /* 565 * Now convert it (this part is for extension). 566 * As Windows XP do, if it's not ascii char, 567 * this function should return 2 or 3, so that checkng out Unicode name. 568 */ 569 if (dp) { 570 if (dp1) 571 l = dp1 - dp; 572 else 573 l = unlen - (dp - un); 574 for (cp = dp, i = l, j = 8; i > 0 && j < 11; j++) { 575 c = unix2doschr(&cp, (size_t *)&i, pmp); 576 if (c & 0xff00) { 577 dn[j] = c >> 8; 578 if (++j < 11) { 579 dn[j] = c; 580 if (conv != 3) 581 conv = 2; 582 continue; 583 } else { 584 conv = 3; 585 dn[j-1] = ' '; 586 break; 587 } 588 } else { 589 dn[j] = c; 590 } 591 if (((dn[j] & 0x80) || *(cp - 1) != dn[j]) && conv != 3) 592 conv = 2; 593 if (dn[j] == 1) { 594 conv = 3; 595 dn[j] = '_'; 596 } 597 if (dn[j] == 2) { 598 conv = 3; 599 dn[j--] = ' '; 600 } 601 } 602 if (i > 0) 603 conv = 3; 604 dp--; 605 } else { 606 for (dp = cp; *--dp == ' ' || *dp == '.';); 607 dp++; 608 } 609 610 /* 611 * Now convert the rest of the name 612 */ 613 for (i = dp - un, j = 0; un < dp && j < 8; j++) { 614 c = unix2doschr(&un, &i, pmp); 615 if (c & 0xff00) { 616 dn[j] = c >> 8; 617 if (++j < 8) { 618 dn[j] = c; 619 if (conv != 3) 620 conv = 2; 621 continue; 622 } else { 623 conv = 3; 624 dn[j-1] = ' '; 625 break; 626 } 627 } else { 628 dn[j] = c; 629 } 630 if (((dn[j] & 0x80) || *(un - 1) != dn[j]) && conv != 3) 631 conv = 2; 632 if (dn[j] == 1) { 633 conv = 3; 634 dn[j] = '_'; 635 } 636 if (dn[j] == 2) { 637 conv = 3; 638 dn[j--] = ' '; 639 } 640 } 641 if (un < dp) 642 conv = 3; 643 /* 644 * If we didn't have any chars in filename, 645 * generate a default 646 */ 647 if (!j) 648 dn[0] = '_'; 649 650 /* 651 * If there wasn't any char dropped, 652 * there is no place for generation numbers 653 */ 654 if (conv != 3) { 655 if (gen > 1) 656 conv = 0; 657 goto done; 658 } 659 660 /* 661 * Now insert the generation number into the filename part 662 */ 663 if (gen == 0) 664 goto done; 665 for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10) 666 *--wcp = gen % 10 + ''; 667 if (gen) { 668 conv = 0; 669 goto done; 670 } 671 for (i = 8; dn[--i] == ' ';); 672 i++; 673 if (gentext + sizeof(gentext) - wcp + 1 > 8 - i) 674 i = 8 - (gentext + sizeof(gentext) - wcp + 1); 675 /* 676 * Correct posision to where insert the generation number 677 */ 678 cp = dn; 679 i -= mbsadjpos((const char**)&cp, i, unlen, 1, pmp->pm_flags, pmp->pm_d2u); 680 681 dn[i++] = '~'; 682 while (wcp < gentext + sizeof(gentext)) 683 dn[i++] = *wcp++; 684 685 /* 686 * Tail of the filename should be space 687 */ 688 while (i < 8) 689 dn[i++] = ' '; 690 conv = 3; 691 692 done: 693 /* 694 * The first character cannot be E5, 695 * because that means a deleted entry 696 */ 697 if (dn[0] == 0xe5) 698 dn[0] = SLOT_E5; 699 700 return conv; 701 } 702 703 /* 704 * Create a Win95 long name directory entry 705 * Note: assumes that the filename is valid, 706 * i.e. doesn't consist solely of blanks and dots 707 */ 708 int 709 unix2winfn(un, unlen, wep, cnt, chksum, pmp) 710 const u_char *un; 711 size_t unlen; 712 struct winentry *wep; 713 int cnt; 714 int chksum; 715 struct msdosfsmount *pmp; 716 { 717 u_int8_t *wcp; 718 int i, end; 719 u_int16_t code; 720 721 /* 722 * Drop trailing blanks and dots 723 */ 724 unlen = winLenFixup(un, unlen); 725 726 /* 727 * Cut *un for this slot 728 */ 729 unlen = mbsadjpos((const char **)&un, unlen, (cnt - 1) * WIN_CHARS, 2, 730 pmp->pm_flags, pmp->pm_u2w); 731 732 /* 733 * Initialize winentry to some useful default 734 */ 735 for (wcp = (u_int8_t *)wep, i = sizeof(*wep); --i >= 0; *wcp++ = 0xff); 736 wep->weCnt = cnt; 737 wep->weAttributes = ATTR_WIN95; 738 wep->weReserved1 = 0; 739 wep->weChksum = chksum; 740 wep->weReserved2 = 0; 741 742 /* 743 * Now convert the filename parts 744 */ 745 end = 0; 746 for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0 && !end;) { 747 code = unix2winchr(&un, &unlen, 0, pmp); 748 *wcp++ = code; 749 *wcp++ = code >> 8; 750 if (!code) 751 end = WIN_LAST; 752 } 753 for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0 && !end;) { 754 code = unix2winchr(&un, &unlen, 0, pmp); 755 *wcp++ = code; 756 *wcp++ = code >> 8; 757 if (!code) 758 end = WIN_LAST; 759 } 760 for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0 && !end;) { 761 code = unix2winchr(&un, &unlen, 0, pmp); 762 *wcp++ = code; 763 *wcp++ = code >> 8; 764 if (!code) 765 end = WIN_LAST; 766 } 767 if (*un == '\0') 768 end = WIN_LAST; 769 wep->weCnt |= end; 770 return !end; 771 } 772 773 /* 774 * Compare our filename to the one in the Win95 entry 775 * Returns the checksum or -1 if no match 776 */ 777 int 778 winChkName(un, unlen, chksum, pmp) 779 const u_char *un; 780 size_t unlen; 781 int chksum; 782 struct msdosfsmount *pmp; 783 { 784 size_t len; 785 u_int16_t c1, c2; 786 u_char *np; 787 struct dirent dirbuf; 788 789 /* 790 * We alread have winentry in mbnambuf 791 */ 792 if (!mbnambuf_flush(&dirbuf) || !dirbuf.d_namlen) 793 return -1; 794 795 #ifdef MSDOSFS_DEBUG 796 printf("winChkName(): un=%s:%d,d_name=%s:%d\n", un, unlen, 797 dirbuf.d_name, 798 dirbuf.d_namlen); 799 #endif 800 801 /* 802 * Compare the name parts 803 */ 804 len = dirbuf.d_namlen; 805 if (unlen != len) 806 return -2; 807 808 for (np = dirbuf.d_name; unlen > 0 && len > 0;) { 809 /* 810 * Comparison must be case insensitive, because FAT disallows 811 * to look up or create files in case sensitive even when 812 * it's a long file name. 813 */ 814 c1 = unix2winchr((const u_char **)&np, &len, LCASE_BASE, pmp); 815 c2 = unix2winchr(&un, &unlen, LCASE_BASE, pmp); 816 if (c1 != c2) 817 return -2; 818 } 819 return chksum; 820 } 821 822 /* 823 * Convert Win95 filename to dirbuf. 824 * Returns the checksum or -1 if impossible 825 */ 826 int 827 win2unixfn(wep, chksum, pmp) 828 struct winentry *wep; 829 int chksum; 830 struct msdosfsmount *pmp; 831 { 832 u_int8_t *cp; 833 u_int8_t *np, name[WIN_CHARS * 2 + 1]; 834 u_int16_t code; 835 int i; 836 837 if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS) 838 || !(wep->weCnt&WIN_CNT)) 839 return -1; 840 841 /* 842 * First compare checksums 843 */ 844 if (wep->weCnt&WIN_LAST) { 845 chksum = wep->weChksum; 846 } else if (chksum != wep->weChksum) 847 chksum = -1; 848 if (chksum == -1) 849 return -1; 850 851 /* 852 * Convert the name parts 853 */ 854 np = name; 855 for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) { 856 code = (cp[1] << 8) | cp[0]; 857 switch (code) { 858 case 0: 859 *np = '\0'; 860 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1); 861 return chksum; 862 case '/': 863 *np = '\0'; 864 return -1; 865 default: 866 code = win2unixchr(code, pmp); 867 if (code & 0xff00) 868 *np++ = code >> 8; 869 *np++ = code; 870 break; 871 } 872 cp += 2; 873 } 874 for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) { 875 code = (cp[1] << 8) | cp[0]; 876 switch (code) { 877 case 0: 878 *np = '\0'; 879 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1); 880 return chksum; 881 case '/': 882 *np = '\0'; 883 return -1; 884 default: 885 code = win2unixchr(code, pmp); 886 if (code & 0xff00) 887 *np++ = code >> 8; 888 *np++ = code; 889 break; 890 } 891 cp += 2; 892 } 893 for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) { 894 code = (cp[1] << 8) | cp[0]; 895 switch (code) { 896 case 0: 897 *np = '\0'; 898 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1); 899 return chksum; 900 case '/': 901 *np = '\0'; 902 return -1; 903 default: 904 code = win2unixchr(code, pmp); 905 if (code & 0xff00) 906 *np++ = code >> 8; 907 *np++ = code; 908 break; 909 } 910 cp += 2; 911 } 912 *np = '\0'; 913 mbnambuf_write(name, (wep->weCnt & WIN_CNT) - 1); 914 return chksum; 915 } 916 917 /* 918 * Compute the unrolled checksum of a DOS filename for Win95 LFN use. 919 */ 920 u_int8_t 921 winChksum(name) 922 u_int8_t *name; 923 { 924 u_int8_t s; 925 926 s = name[0]; 927 s = ((s << 7) | (s >> 1)) + name[1]; 928 s = ((s << 7) | (s >> 1)) + name[2]; 929 s = ((s << 7) | (s >> 1)) + name[3]; 930 s = ((s << 7) | (s >> 1)) + name[4]; 931 s = ((s << 7) | (s >> 1)) + name[5]; 932 s = ((s << 7) | (s >> 1)) + name[6]; 933 s = ((s << 7) | (s >> 1)) + name[7]; 934 s = ((s << 7) | (s >> 1)) + name[8]; 935 s = ((s << 7) | (s >> 1)) + name[9]; 936 s = ((s << 7) | (s >> 1)) + name[10]; 937 938 return (s); 939 } 940 941 /* 942 * Determine the number of slots necessary for Win95 names 943 */ 944 int 945 winSlotCnt(un, unlen, pmp) 946 const u_char *un; 947 size_t unlen; 948 struct msdosfsmount *pmp; 949 { 950 size_t wlen; 951 char wn[WIN_MAXLEN * 2 + 1], *wnp; 952 953 unlen = winLenFixup(un, unlen); 954 955 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) { 956 wlen = WIN_MAXLEN * 2; 957 wnp = wn; 958 msdosfs_iconv->conv(pmp->pm_u2w, (const char **)&un, &unlen, &wnp, &wlen); 959 if (unlen > 0) 960 return 0; 961 return howmany(WIN_MAXLEN - wlen/2, WIN_CHARS); 962 } 963 964 if (unlen > WIN_MAXLEN) 965 return 0; 966 return howmany(unlen, WIN_CHARS); 967 } 968 969 /* 970 * Determine the number of bytes neccesary for Win95 names 971 */ 972 size_t 973 winLenFixup(un, unlen) 974 const u_char* un; 975 size_t unlen; 976 { 977 for (un += unlen; unlen > 0; unlen--) 978 if (*--un != ' ' && *un != '.') 979 break; 980 return unlen; 981 } 982 983 /* 984 * Store an area with multi byte string instr, and reterns left 985 * byte of instr and moves pointer forward. The area's size is 986 * inlen or outlen. 987 */ 988 static int 989 mbsadjpos(const char **instr, size_t inlen, size_t outlen, int weight, int flag, void *handle) 990 { 991 char *outp, outstr[outlen * weight + 1]; 992 993 if (flag & MSDOSFSMNT_KICONV && msdosfs_iconv) { 994 outp = outstr; 995 outlen *= weight; 996 msdosfs_iconv->conv(handle, instr, &inlen, &outp, &outlen); 997 return (inlen); 998 } 999 1000 (*instr) += min(inlen, outlen); 1001 return (inlen - min(inlen, outlen)); 1002 } 1003 1004 /* 1005 * Convert DOS char to Local char 1006 */ 1007 static u_int16_t 1008 dos2unixchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp) 1009 { 1010 u_char c; 1011 char *outp, outbuf[3]; 1012 u_int16_t wc; 1013 size_t len, olen; 1014 1015 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) { 1016 olen = len = 2; 1017 outp = outbuf; 1018 1019 if (lower & (LCASE_BASE | LCASE_EXT)) 1020 msdosfs_iconv->convchr_case(pmp->pm_d2u, (const char **)instr, 1021 ilen, &outp, &olen, KICONV_LOWER); 1022 else 1023 msdosfs_iconv->convchr(pmp->pm_d2u, (const char **)instr, 1024 ilen, &outp, &olen); 1025 len -= olen; 1026 1027 /* 1028 * return '?' if failed to convert 1029 */ 1030 if (len == 0) { 1031 (*ilen)--; 1032 (*instr)++; 1033 return ('?'); 1034 } 1035 1036 wc = 0; 1037 while(len--) 1038 wc |= (*(outp - len - 1) & 0xff) << (len << 3); 1039 return (wc); 1040 } 1041 1042 (*ilen)--; 1043 c = *(*instr)++; 1044 c = dos2unix[c]; 1045 if (lower & (LCASE_BASE | LCASE_EXT)) 1046 c = u2l[c]; 1047 return ((u_int16_t)c); 1048 } 1049 1050 /* 1051 * Convert Local char to DOS char 1052 */ 1053 static u_int16_t 1054 unix2doschr(const u_char **instr, size_t *ilen, struct msdosfsmount *pmp) 1055 { 1056 u_char c; 1057 char *up, *outp, unicode[3], outbuf[3]; 1058 u_int16_t wc; 1059 size_t len, ucslen, unixlen, olen; 1060 1061 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) { 1062 /* 1063 * to hide an invisible character, using a unicode filter 1064 */ 1065 ucslen = 2; 1066 len = *ilen; 1067 up = unicode; 1068 msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr, 1069 ilen, &up, &ucslen); 1070 unixlen = len - *ilen; 1071 1072 /* 1073 * cannot be converted 1074 */ 1075 if (unixlen == 0) { 1076 (*ilen)--; 1077 (*instr)++; 1078 return (0); 1079 } 1080 1081 /* 1082 * return magic number for ascii char 1083 */ 1084 if (unixlen == 1) { 1085 c = *(*instr -1); 1086 if (! (c & 0x80)) { 1087 c = unix2dos[c]; 1088 if (c <= 2) 1089 return (c); 1090 } 1091 } 1092 1093 /* 1094 * now convert using libiconv 1095 */ 1096 *instr -= unixlen; 1097 *ilen = len; 1098 1099 olen = len = 2; 1100 outp = outbuf; 1101 msdosfs_iconv->convchr_case(pmp->pm_u2d, (const char **)instr, 1102 ilen, &outp, &olen, KICONV_FROM_UPPER); 1103 len -= olen; 1104 1105 /* 1106 * cannot be converted, but has unicode char, should return magic number 1107 */ 1108 if (len == 0) { 1109 (*ilen) -= unixlen; 1110 (*instr) += unixlen; 1111 return (1); 1112 } 1113 1114 wc = 0; 1115 while(len--) 1116 wc |= (*(outp - len - 1) & 0xff) << (len << 3); 1117 return (wc); 1118 } 1119 1120 (*ilen)--; 1121 c = *(*instr)++; 1122 c = l2u[c]; 1123 c = unix2dos[c]; 1124 return ((u_int16_t)c); 1125 } 1126 1127 /* 1128 * Convert Windows char to Local char 1129 */ 1130 static u_int16_t 1131 win2unixchr(u_int16_t wc, struct msdosfsmount *pmp) 1132 { 1133 u_char *inp, *outp, inbuf[3], outbuf[3]; 1134 size_t ilen, olen, len; 1135 1136 if (wc == 0) 1137 return (0); 1138 1139 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) { 1140 inbuf[0] = (u_char)(wc>>8); 1141 inbuf[1] = (u_char)wc; 1142 inbuf[2] = '\0'; 1143 1144 ilen = olen = len = 2; 1145 inp = inbuf; 1146 outp = outbuf; 1147 msdosfs_iconv->convchr(pmp->pm_w2u, (const char **)&inp, &ilen, 1148 (char **)&outp, &olen); 1149 len -= olen; 1150 1151 /* 1152 * return '?' if failed to convert 1153 */ 1154 if (len == 0) { 1155 wc = '?'; 1156 return (wc); 1157 } 1158 1159 wc = 0; 1160 while(len--) 1161 wc |= (*(outp - len - 1) & 0xff) << (len << 3); 1162 return (wc); 1163 } 1164 1165 if (wc & 0xff00) 1166 wc = '?'; 1167 1168 return (wc); 1169 } 1170 1171 /* 1172 * Convert Local char to Windows char 1173 */ 1174 static u_int16_t 1175 unix2winchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp) 1176 { 1177 u_char *outp, outbuf[3]; 1178 u_int16_t wc; 1179 size_t olen; 1180 1181 if (*ilen == 0) 1182 return (0); 1183 1184 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) { 1185 outp = outbuf; 1186 olen = 2; 1187 if (lower & (LCASE_BASE | LCASE_EXT)) 1188 msdosfs_iconv->convchr_case(pmp->pm_u2w, (const char **)instr, 1189 ilen, (char **)&outp, &olen, 1190 KICONV_FROM_LOWER); 1191 else 1192 msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr, 1193 ilen, (char **)&outp, &olen); 1194 1195 /* 1196 * return '' if end of filename 1197 */ 1198 if (olen == 2) 1199 return (0); 1200 1201 wc = (outbuf[0]<<8) | outbuf[1]; 1202 1203 return (wc); 1204 } 1205 1206 (*ilen)--; 1207 wc = (*instr)[0]; 1208 if (lower & (LCASE_BASE | LCASE_EXT)) 1209 wc = u2l[wc]; 1210 (*instr)++; 1211 return (wc); 1212 } 1213 1214 /* 1215 * Initialize the temporary concatenation buffer (once) and mark it as 1216 * empty on subsequent calls. 1217 */ 1218 void 1219 mbnambuf_init(void) 1220 { 1221 1222 if (nambuf_ptr == NULL) { 1223 nambuf_ptr = malloc(MAXNAMLEN + 1, M_MSDOSFSMNT, M_WAITOK); 1224 nambuf_ptr[MAXNAMLEN] = '\0'; 1225 } 1226 nambuf_len = 0; 1227 nambuf_last_id = -1; 1228 } 1229 1230 /* 1231 * Fill out our concatenation buffer with the given substring, at the offset 1232 * specified by its id. Since this function must be called with ids in 1233 * descending order, we take advantage of the fact that ASCII substrings are 1234 * exactly WIN_CHARS in length. For non-ASCII substrings, we shift all 1235 * previous (i.e. higher id) substrings upwards to make room for this one. 1236 * This only penalizes portions of substrings that contain more than 1237 * WIN_CHARS bytes when they are first encountered. 1238 */ 1239 void 1240 mbnambuf_write(char *name, int id) 1241 { 1242 size_t count; 1243 char *slot; 1244 1245 KASSERT(nambuf_len == 0 || id == nambuf_last_id - 1, 1246 ("non-decreasing id, id %d last id %d", id, nambuf_last_id)); 1247 1248 /* Store this substring in a WIN_CHAR-aligned slot. */ 1249 slot = nambuf_ptr + (id * WIN_CHARS); 1250 count = strlen(name); 1251 if (nambuf_len + count > MAXNAMLEN) { 1252 printf("msdosfs: file name %zu too long\n", nambuf_len + count); 1253 return; 1254 } 1255 1256 /* Shift suffix upwards by the amount length exceeds WIN_CHARS. */ 1257 if (count > WIN_CHARS && nambuf_len != 0) 1258 bcopy(slot + WIN_CHARS, slot + count, nambuf_len); 1259 1260 /* Copy in the substring to its slot and update length so far. */ 1261 bcopy(name, slot, count); 1262 nambuf_len += count; 1263 nambuf_last_id = id; 1264 } 1265 1266 /* 1267 * Take the completed string and use it to setup the struct dirent. 1268 * Be sure to always nul-terminate the d_name and then copy the string 1269 * from our buffer. Note that this function assumes the full string has 1270 * been reassembled in the buffer. If it's called before all substrings 1271 * have been written via mbnambuf_write(), the result will be incorrect. 1272 */ 1273 char * 1274 mbnambuf_flush(struct dirent *dp) 1275 { 1276 1277 if (nambuf_len > sizeof(dp->d_name) - 1) { 1278 mbnambuf_init(); 1279 return (NULL); 1280 } 1281 bcopy(nambuf_ptr, dp->d_name, nambuf_len); 1282 dp->d_name[nambuf_len] = '\0'; 1283 dp->d_namlen = nambuf_len; 1284 1285 mbnambuf_init(); 1286 return (dp->d_name); 1287 }
Cache object: 6b02658f71e730be2c3a67447fc4b4e6
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]