| 1 | /*␊ |
| 2 | * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 6 | * The contents of this file constitute Original Code as defined in and␊ |
| 7 | * are subject to the Apple Public Source License Version 2.0 (the␊ |
| 8 | * "License"). You may not use this file except in compliance with the␊ |
| 9 | * License. Please obtain a copy of the License at␊ |
| 10 | * http://www.apple.com/publicsource and read it before using this file.␊ |
| 11 | * ␊ |
| 12 | * This Original Code and all software distributed under the License are␊ |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the␊ |
| 17 | * License for the specific language governing rights and limitations␊ |
| 18 | * under the License.␊ |
| 19 | * ␊ |
| 20 | * @APPLE_LICENSE_HEADER_END@␊ |
| 21 | */␊ |
| 22 | /*␊ |
| 23 | * Copyright (c) 1998 Robert Nordier␊ |
| 24 | * All rights reserved.␊ |
| 25 | *␊ |
| 26 | * Redistribution and use in source and binary forms, with or without␊ |
| 27 | * modification, are permitted provided that the following conditions␊ |
| 28 | * are met:␊ |
| 29 | * 1. Redistributions of source code must retain the above copyright␊ |
| 30 | * notice, this list of conditions and the following disclaimer.␊ |
| 31 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
| 32 | * notice, this list of conditions and the following disclaimer in␊ |
| 33 | * the documentation and/or other materials provided with the␊ |
| 34 | * distribution.␊ |
| 35 | *␊ |
| 36 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS␊ |
| 37 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED␊ |
| 38 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE␊ |
| 39 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY␊ |
| 40 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL␊ |
| 41 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE␊ |
| 42 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS␊ |
| 43 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER␊ |
| 44 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR␊ |
| 45 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN␊ |
| 46 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.␊ |
| 47 | */␊ |
| 48 | ␊ |
| 49 | #include "libsaio.h"␊ |
| 50 | #include "sl.h"␊ |
| 51 | #include "msdos_private.h"␊ |
| 52 | #include "msdos.h"␊ |
| 53 | ␊ |
| 54 | #define LABEL_LENGTH␉␉11␊ |
| 55 | #define MSDOS_CACHE_BLOCKSIZE BPS␊ |
| 56 | ␊ |
| 57 | #define␉CLUST_FIRST␉␉2/* reserved cluster range */␊ |
| 58 | #define␉CLUST_RSRVD32␉0x0ffffff8␉/* reserved cluster range */␊ |
| 59 | #define␉CLUST_RSRVD16␉0xfff8␉/* reserved cluster range */␊ |
| 60 | #define␉CLUST_RSRVD12␉0xff8␉/* reserved cluster range */␊ |
| 61 | ␊ |
| 62 | #define tolower(c) (((c)>='A' && c<='Z')?((c) | 0x20):(c))␊ |
| 63 | ␊ |
| 64 | static int msdosressector=0;␊ |
| 65 | static int msdosnfats = 0;␊ |
| 66 | static int msdosfatsecs = 0;␊ |
| 67 | static int msdosbps = 0;␊ |
| 68 | static int msdosclustersize = 0;␊ |
| 69 | static int msdosrootDirSectors = 0;␊ |
| 70 | static CICell msdoscurrent = 0;␊ |
| 71 | static int msdosrootcluster = 0;␊ |
| 72 | static int msdosfatbits = 0;␊ |
| 73 | ␊ |
| 74 | #if UNUSED␊ |
| 75 | /*␊ |
| 76 | * Check a volume label.␊ |
| 77 | */␊ |
| 78 | static int␊ |
| 79 | oklabel(const char *src)␊ |
| 80 | {␊ |
| 81 | int c, i;␊ |
| 82 | ␊ |
| 83 | for (i = 0, c = 0; i <= 11; i++) {␊ |
| 84 | c = (u_char)*src++;␊ |
| 85 | if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c))␊ |
| 86 | break;␊ |
| 87 | }␊ |
| 88 | return i && !c;␊ |
| 89 | }␊ |
| 90 | #endif /* UNUSED */␊ |
| 91 | ␊ |
| 92 | void MSDOSFree(CICell ih)␊ |
| 93 | {␊ |
| 94 | ␉if(msdoscurrent == ih)␊ |
| 95 | msdoscurrent = 0;␊ |
| 96 | free(ih);␊ |
| 97 | }␊ |
| 98 | ␊ |
| 99 | int MSDOSProbe(const void * buffer)␊ |
| 100 | {␊ |
| 101 | union bootsector *bsp;␊ |
| 102 | struct bpb33 *b33;␊ |
| 103 | struct bpb50 *b50;␊ |
| 104 | struct bpb710 *b710;␊ |
| 105 | u_int16_t␉ bps;␊ |
| 106 | u_int8_t␉␉spc;␊ |
| 107 | ␉␊ |
| 108 | bsp = (union bootsector *)buffer;␊ |
| 109 | b33 = (struct bpb33 *)bsp->bs33.bsBPB;␊ |
| 110 | b50 = (struct bpb50 *)bsp->bs50.bsBPB;␊ |
| 111 | b710 = (struct bpb710 *)bsp->bs710.bsBPB;␊ |
| 112 | ␊ |
| 113 | /* We only work with 512, 1024, and 2048 byte sectors */␊ |
| 114 | bps = OSSwapLittleToHostInt16(b33->bpbBytesPerSec);␊ |
| 115 | if ((bps < 0x200) || (bps & (bps - 1)) || (bps > 0x800)) ␊ |
| 116 | return 0;␊ |
| 117 | ␊ |
| 118 | ␉/* Check to make sure valid sectors per cluster */␊ |
| 119 | spc = b33->bpbSecPerClust;␊ |
| 120 | if ((spc == 0 ) || (spc & (spc - 1))) ␊ |
| 121 | return 0;␉␊ |
| 122 | ␉␊ |
| 123 | ␉if (OSSwapLittleToHostInt16(b50->bpbRootDirEnts) == 0) { /* It's FAT32 */␊ |
| 124 | ␉␉if (!memcmp(((struct extboot *)bsp->bs710.bsExt)->exFileSysType, "FAT32 ", 8))␊ |
| 125 | ␉␉␉return 32;␊ |
| 126 | ␉}␊ |
| 127 | ␉else if (((struct extboot *)bsp->bs50.bsExt)->exBootSignature == EXBOOTSIG) {␊ |
| 128 | ␉␉if (!memcmp((char *)((struct extboot *)bsp->bs50.bsExt)->exFileSysType, "FAT16 ", 8))␊ |
| 129 | ␉␉␉return 16;␊ |
| 130 | ␉␉if (!memcmp((char *)((struct extboot *)bsp->bs50.bsExt)->exFileSysType, "FAT12 ", 8))␊ |
| 131 | ␉␉␉return 12;␊ |
| 132 | ␉}␉␊ |
| 133 | ␉␉␊ |
| 134 | ␉return 0;␊ |
| 135 | }␊ |
| 136 | ␊ |
| 137 | ␊ |
| 138 | long␊ |
| 139 | MSDOSInitPartition (CICell ih)␊ |
| 140 | {␊ |
| 141 | union bootsector *bsp;␊ |
| 142 | struct bpb33 *b33;␊ |
| 143 | struct bpb50 *b50;␊ |
| 144 | struct bpb710 *b710;␊ |
| 145 | u_int8_t␉␉spc;␊ |
| 146 | char *buf;␊ |
| 147 | ␉␊ |
| 148 | ␉if (msdoscurrent == ih)␊ |
| 149 | ␉{␊ |
| 150 | ␉␉CacheInit(ih, MSDOS_CACHE_BLOCKSIZE);␊ |
| 151 | ␉␉return 0;␊ |
| 152 | ␉}␊ |
| 153 | ␉␊ |
| 154 | ␉buf=malloc (512);␊ |
| 155 | ␉if (!buf) ␊ |
| 156 | ␉{ ␊ |
| 157 | ␉␉return -1;␊ |
| 158 | ␉}␊ |
| 159 | ␊ |
| 160 | ␉/*␊ |
| 161 | ␉ * Read the boot sector of the filesystem, and then check the␊ |
| 162 | ␉ * boot signature. If not a dos boot sector then error out.␊ |
| 163 | ␉ *␊ |
| 164 | ␉ * NOTE: 2048 is a maximum sector size in current...␊ |
| 165 | ␉ */␊ |
| 166 | ␊ |
| 167 | ␉Seek(ih, 0);␊ |
| 168 | ␉Read(ih, (long)buf, 512);␊ |
| 169 | ␉␊ |
| 170 | bsp = (union bootsector *)buf;␊ |
| 171 | b33 = (struct bpb33 *)bsp->bs33.bsBPB;␊ |
| 172 | b50 = (struct bpb50 *)bsp->bs50.bsBPB;␊ |
| 173 | b710 = (struct bpb710 *)bsp->bs710.bsBPB;␊ |
| 174 | ␊ |
| 175 | ␉␊ |
| 176 | ␉/* We only work with 512, 1024, and 2048 byte sectors */␊ |
| 177 | ␉msdosbps = OSSwapLittleToHostInt16(b33->bpbBytesPerSec);␊ |
| 178 | ␉if ((msdosbps < 0x200) || (msdosbps & (msdosbps - 1)) || (msdosbps > 0x800)) ␊ |
| 179 | ␉{␊ |
| 180 | ␉␉free (buf);␊ |
| 181 | ␉␉return -1;␊ |
| 182 | ␉}␊ |
| 183 | ␉␊ |
| 184 | ␉/* Check to make sure valid sectors per cluster */␊ |
| 185 | ␉spc = b33->bpbSecPerClust;␊ |
| 186 | ␉if ((spc == 0 ) || (spc & (spc - 1)))␊ |
| 187 | ␉{␊ |
| 188 | ␉␉free (buf);␊ |
| 189 | ␉␉return -1;␊ |
| 190 | ␉}␊ |
| 191 | ␉if (OSSwapLittleToHostInt16(b50->bpbRootDirEnts) == 0)␊ |
| 192 | ␉{␊ |
| 193 | ␉␉/* It's FAT32 */␊ |
| 194 | ␉␉if (memcmp(((struct extboot *)bsp->bs710.bsExt)->exFileSysType, "FAT32 ", 8))␊ |
| 195 | ␉␉{␊ |
| 196 | ␉␉␉free (buf);␊ |
| 197 | ␉␉␉return -1;␊ |
| 198 | ␉␉}␊ |
| 199 | ␉␉msdosressector = OSSwapLittleToHostInt16(b710->bpbResSectors);␊ |
| 200 | ␉␉msdosnfats = b710->bpbFATs;␊ |
| 201 | ␉␉msdosfatsecs = OSSwapLittleToHostInt16(b710->bpbBigFATsecs);␊ |
| 202 | ␉␉msdosrootcluster = OSSwapLittleToHostInt32(b710->bpbRootClust);␊ |
| 203 | ␉␉msdosrootDirSectors = 0;␊ |
| 204 | ␉␉msdosfatbits = 32;␊ |
| 205 | ␉}␊ |
| 206 | ␉else if (((struct extboot *)bsp->bs50.bsExt)->exBootSignature == EXBOOTSIG) {␊ |
| 207 | ␉␉if (!memcmp((char *)((struct extboot *)bsp->bs50.bsExt)->exFileSysType, "FAT16 ", 8))␊ |
| 208 | ␉␉␉msdosfatbits = 16;␊ |
| 209 | ␉␉else if (!memcmp((char *)((struct extboot *)bsp->bs50.bsExt)->exFileSysType, "FAT12 ", 8))␊ |
| 210 | ␉␉␉msdosfatbits = 12;␊ |
| 211 | ␉␉else␊ |
| 212 | ␉␉{␊ |
| 213 | ␉␉␉free (buf);␊ |
| 214 | ␉␉␉return -1;␊ |
| 215 | ␉␉}␉␉␊ |
| 216 | ␉␉␊ |
| 217 | ␉␉msdosressector = OSSwapLittleToHostInt16(b33->bpbResSectors);␊ |
| 218 | ␉␉msdosnfats = b33->bpbFATs;␊ |
| 219 | ␉␉msdosfatsecs = OSSwapLittleToHostInt16(b33->bpbFATsecs);␊ |
| 220 | ␉␉msdosrootcluster = 0;␉␉␊ |
| 221 | ␉␉msdosrootDirSectors = ((OSSwapLittleToHostInt16(b50->bpbRootDirEnts) * sizeof(struct direntry)) +␊ |
| 222 | ␉␉␉␉␉␉␉ (msdosbps-1)) / msdosbps;␊ |
| 223 | ␉} else {␊ |
| 224 | ␉␉free (buf);␊ |
| 225 | ␉␉return -1;␊ |
| 226 | ␉}␊ |
| 227 | ␉␊ |
| 228 | ␉msdosclustersize = msdosbps * spc;␊ |
| 229 | ␉msdoscurrent = ih;␊ |
| 230 | ␊ |
| 231 | ␉CacheInit(ih, MSDOS_CACHE_BLOCKSIZE);␊ |
| 232 | ␉free (buf);␊ |
| 233 | ␉return 0;␊ |
| 234 | }␊ |
| 235 | ␊ |
| 236 | static int␊ |
| 237 | readSector(CICell ih, off_t readOffset, char *buf, int size)␊ |
| 238 | {␊ |
| 239 | // Caching only FAT entries (4 bytes) by utlizing the cache with sector aligned read requests.␊ |
| 240 | ␉if (size < BPS)␊ |
| 241 | ␉{␊ |
| 242 | ␉␉long long sectorOffset = (uint64_t)readOffset / BPS * BPS;␊ |
| 243 | ␉␉long relOffset = readOffset % BPS;␊ |
| 244 | ␉␉char *cacheBuffer;␊ |
| 245 | ␉␊ |
| 246 | ␉␉cacheBuffer = malloc(MSDOS_CACHE_BLOCKSIZE);␊ |
| 247 | ␉␉if (!cacheBuffer) ␊ |
| 248 | ␉␉{␊ |
| 249 | ␉␉␉return -1;␊ |
| 250 | ␉␉}␊ |
| 251 | ␉␉CacheRead(ih, cacheBuffer, sectorOffset, MSDOS_CACHE_BLOCKSIZE, true);␊ |
| 252 | ␉␉bcopy(cacheBuffer + relOffset, buf, size);␊ |
| 253 | ␉␉free(cacheBuffer);␊ |
| 254 | ␉}␊ |
| 255 | ␉else␊ |
| 256 | ␉{␊ |
| 257 | ␉␉Seek(ih, readOffset);␊ |
| 258 | ␉␉Read(ih, (long)buf, size);␊ |
| 259 | ␉}␊ |
| 260 | ␊ |
| 261 | ␉return 0;␊ |
| 262 | }␊ |
| 263 | ␊ |
| 264 | static int␊ |
| 265 | msdosreadcluster (CICell ih, uint8_t *buf, int size, off_t *cluster)␊ |
| 266 | {␊ |
| 267 | off_t readOffset;␊ |
| 268 | ␉char tmpbuf[8];␊ |
| 269 | ␉off_t clusn;␊ |
| 270 | ␉␊ |
| 271 | ␉switch (msdosfatbits) {␊ |
| 272 | ␉␉case 32:␊ |
| 273 | ␉␉␉if (*cluster < CLUST_FIRST ||*cluster >= CLUST_RSRVD32)␊ |
| 274 | ␉␉␉␉return 0;␊ |
| 275 | ␉␉␉clusn = *cluster - CLUST_FIRST;␊ |
| 276 | ␉␉␉break;␊ |
| 277 | ␉␉case 16:␊ |
| 278 | ␉␉␉if (*cluster < CLUST_FIRST ||*cluster >= CLUST_RSRVD16)␊ |
| 279 | ␉␉␉␉return 0;␊ |
| 280 | ␉␉␉clusn = *cluster - CLUST_FIRST;␊ |
| 281 | ␉␉␉break;␉␉␉␊ |
| 282 | ␉␉case 12:␊ |
| 283 | ␉␉␉if (*cluster < CLUST_FIRST ||*cluster >= CLUST_RSRVD12)␊ |
| 284 | ␉␉␉␉return 0;␊ |
| 285 | ␉␉␉clusn = *cluster - CLUST_FIRST;␊ |
| 286 | ␉␉␉break;␊ |
| 287 | ␉␉default:␊ |
| 288 | ␉␉␉return 0;␊ |
| 289 | ␉}␊ |
| 290 | ␉␊ |
| 291 | ␉/* Find sector where clusters start */␊ |
| 292 | ␉readOffset = (msdosressector +␊ |
| 293 | ␉␉␉␉ (msdosnfats * msdosfatsecs)+msdosrootDirSectors)*msdosbps;␊ |
| 294 | ␉/* Find sector where "cluster" starts */␊ |
| 295 | ␉readOffset += clusn * msdosclustersize;␊ |
| 296 | ␉␊ |
| 297 | ␉/* Read in "cluster" */␊ |
| 298 | ␉if (buf)␊ |
| 299 | ␉{␊ |
| 300 | ␉␉Seek(ih, readOffset);␊ |
| 301 | ␉␉Read(ih, (long)buf, size);␊ |
| 302 | ␉}␊ |
| 303 | ␊ |
| 304 | ␉/* Find first sector of FAT */␊ |
| 305 | ␉readOffset = msdosressector * msdosbps;␊ |
| 306 | ␊ |
| 307 | ␉/* Find sector containing "cluster" entry in FAT */␊ |
| 308 | ␉readOffset += ((uint64_t)*cluster * (uint64_t)msdosfatbits) / 8;␊ |
| 309 | ␉␊ |
| 310 | ␉/* Read one sector of the FAT */␊ |
| 311 | ␉if (readSector(ih, readOffset, tmpbuf, 4) != 0) return 0;␊ |
| 312 | ␉␊ |
| 313 | ␉switch (msdosfatbits) {␊ |
| 314 | ␉␉case 32:␊ |
| 315 | ␉␉␉*cluster = OSReadLittleInt32(tmpbuf, 0);␊ |
| 316 | ␉␉␉*cluster &= 0x0FFFFFFF;␉// ignore reserved upper bits␊ |
| 317 | ␉␉␉return 1;␊ |
| 318 | ␉␉case 16:␊ |
| 319 | ␉␉␉*cluster = OSReadLittleInt16(tmpbuf, 0);␊ |
| 320 | ␉␉␉return 1;␉␉␉␊ |
| 321 | ␉␉case 12:␊ |
| 322 | ␉␉␉*cluster = OSReadLittleInt16(tmpbuf, 0)>>(((uint64_t)*cluster * (uint64_t)msdosfatbits)%8);␊ |
| 323 | ␉␉␉*cluster &= 0xfff;␊ |
| 324 | ␉␉␉return 1;␊ |
| 325 | ␉␉default:␊ |
| 326 | ␉␉␉return 0;␊ |
| 327 | ␉}␊ |
| 328 | }␊ |
| 329 | ␊ |
| 330 | struct msdosdirstate␊ |
| 331 | {␊ |
| 332 | ␉struct direntry *buf;␊ |
| 333 | ␉uint8_t vfatchecksum;␊ |
| 334 | ␉int root16;␊ |
| 335 | ␉off_t cluster;␊ |
| 336 | ␉int nument;␊ |
| 337 | ␉int vfatnumber;␊ |
| 338 | };␊ |
| 339 | ␊ |
| 340 | static struct direntry *␊ |
| 341 | getnextdirent (CICell ih, uint16_t *longname, struct msdosdirstate *st)␊ |
| 342 | {␊ |
| 343 | ␉struct direntry *dirp;␊ |
| 344 | ␉while (1)␊ |
| 345 | ␉{␊ |
| 346 | ␉␉if (st->root16)␊ |
| 347 | ␉␉{␊ |
| 348 | ␉␉␉if (st->cluster >= msdosrootDirSectors && st->nument == 0)␊ |
| 349 | ␉␉␉␉return 0;␊ |
| 350 | ␉␉␉if (st->nument == 0)␊ |
| 351 | ␉␉␉{␊ |
| 352 | ␉␉␉␉Seek(ih, (msdosressector +␊ |
| 353 | ␉␉␉␉␉␉ (msdosnfats * msdosfatsecs)+st->cluster)*msdosbps);␊ |
| 354 | ␉␉␉␉Read(ih, (long)st->buf, msdosbps);␊ |
| 355 | ␉␉␉␉st->cluster++;␊ |
| 356 | ␉␉␉}␊ |
| 357 | ␉␉} else if (st->nument == 0 && !msdosreadcluster (ih, (uint8_t *)st->buf, msdosclustersize, &(st->cluster)))␊ |
| 358 | ␉␉␉return 0;␊ |
| 359 | ␉␉␊ |
| 360 | ␉␉dirp=st->buf+st->nument;␊ |
| 361 | ␉␉␊ |
| 362 | ␉␉if (dirp->deName[0] == SLOT_EMPTY)␊ |
| 363 | ␉␉␉return 0;␊ |
| 364 | ␉␉else if (dirp->deName[0] == SLOT_DELETED)␊ |
| 365 | ␉␉␉st->vfatnumber = 0;␊ |
| 366 | ␉␉else if (dirp->deAttributes == ATTR_WIN95)␊ |
| 367 | ␉␉{␊ |
| 368 | ␉␉␉struct winentry *wdirp = (struct winentry *)dirp;␊ |
| 369 | ␉␉␉int num;␊ |
| 370 | ␉␉␉if (wdirp->weCnt & 0x80)␊ |
| 371 | ␉␉␉␉continue;␊ |
| 372 | ␉␉␉num=(wdirp->weCnt&0x3f);␊ |
| 373 | ␉␉␉if (WIN_CHARS * num > WIN_MAXLEN)␊ |
| 374 | ␉␉␉␉continue;␊ |
| 375 | ␉␉␉if (st->vfatchecksum!=wdirp->weChksum)␊ |
| 376 | ␉␉␉{␊ |
| 377 | ␉␉␉␉st->vfatnumber = 0;␊ |
| 378 | ␉␉␉␉st->vfatchecksum = wdirp->weChksum;␊ |
| 379 | ␉␉␉}␊ |
| 380 | ␉␉␉if (st->vfatnumber < num)␊ |
| 381 | ␉␉␉␉st->vfatnumber = num;␊ |
| 382 | ␉␉␉bcopy (&(wdirp->wePart1),longname+WIN_CHARS*(num-1),sizeof (wdirp->wePart1));␊ |
| 383 | ␉␉␉bcopy (&(wdirp->wePart2),longname+WIN_CHARS*(num-1)+5,sizeof (wdirp->wePart2));␊ |
| 384 | ␉␉␉bcopy (&(wdirp->wePart3),longname+WIN_CHARS*(num-1)+11,sizeof (wdirp->wePart3));␊ |
| 385 | ␉␉} else {␊ |
| 386 | ␉␉␉uint8_t labelchecksum;␊ |
| 387 | ␉␉␉int i;␊ |
| 388 | ␉␉␉longname[st->vfatnumber*WIN_CHARS]=0;␊ |
| 389 | ␉␉␉␊ |
| 390 | ␉␉␉labelchecksum=0;␊ |
| 391 | ␉␉␉for(i=0;i<LABEL_LENGTH;i++)␊ |
| 392 | ␉␉␉␉labelchecksum=(labelchecksum>>1)+(labelchecksum<<7)+dirp->deName[i];␊ |
| 393 | ␉␉␉if (!(labelchecksum==st->vfatchecksum && st->vfatnumber))␊ |
| 394 | ␉␉␉␉longname[0]=0;␊ |
| 395 | ␉␉␉st->vfatnumber = 0;␊ |
| 396 | ␉␉␉st->vfatchecksum = 0;␊ |
| 397 | ␉␉␉st->vfatnumber = 0;␊ |
| 398 | ␉␉␉st->nument++;␊ |
| 399 | ␉␉␉if (((int)(!st->root16 &&st->nument * sizeof (struct direntry))>=msdosclustersize)␊ |
| 400 | ␉␉␉␉|| ((int)(st->root16 &&st->nument * sizeof (struct direntry))>=msdosbps))␊ |
| 401 | ␉␉␉␉st->nument = 0;␊ |
| 402 | ␉␉␉return dirp;␊ |
| 403 | ␉␉}␊ |
| 404 | ␉␉st->nument++;␊ |
| 405 | ␉␉if (((int)(!st->root16 &&st->nument * sizeof (struct direntry))>=msdosclustersize)␊ |
| 406 | ␉␉␉|| ((int)(st->root16 &&st->nument * sizeof (struct direntry))>=msdosbps))␊ |
| 407 | ␉␉␉st->nument = 0;␉␉␊ |
| 408 | ␉}␊ |
| 409 | }␊ |
| 410 | ␊ |
| 411 | static void␊ |
| 412 | initRoot (struct msdosdirstate *st)␊ |
| 413 | {␊ |
| 414 | ␉if (msdosrootDirSectors) {␉␉␉/* FAT12 or FAT16 */␊ |
| 415 | ␉␉st->root16 = 1;␊ |
| 416 | ␉␉st->vfatchecksum = 0;␊ |
| 417 | ␉␉st->nument = 0;␊ |
| 418 | ␉␉st->cluster = 0;␊ |
| 419 | ␉␉st->vfatnumber = 0;␊ |
| 420 | ␉} else {␉/* FAT32 */␊ |
| 421 | ␉␉st->root16 = 0;␊ |
| 422 | ␉␉st->vfatchecksum = 0;␊ |
| 423 | ␉␉st->nument = 0;␊ |
| 424 | ␉␉st->cluster = msdosrootcluster;␊ |
| 425 | ␉␉st->vfatnumber = 0;␊ |
| 426 | ␉}␊ |
| 427 | }␊ |
| 428 | ␊ |
| 429 | /* First comes lowercase, then uppercase*/␊ |
| 430 | static uint16_t cp850[128][2]=␊ |
| 431 | {␊ |
| 432 | {0x00E7,0x00C7},␊ |
| 433 | {0x00FC,0x00DC},␊ |
| 434 | {0x00E9,0x00C9},␊ |
| 435 | {0x00E2,0x00C2},␊ |
| 436 | {0x00E4,0x00C4},␊ |
| 437 | {0x00E0,0x00C0},␊ |
| 438 | {0x00E5,0x00C5},␊ |
| 439 | {0x00E7,0x00C7},␊ |
| 440 | {0x00EA,0x00CA},␊ |
| 441 | {0x00EB,0x00CB},␊ |
| 442 | {0x00E8,0x00C8},␊ |
| 443 | {0x00EF,0x00CF},␊ |
| 444 | {0x00EE,0x00CE},␊ |
| 445 | {0x00EC,0x00CC},␊ |
| 446 | {0x00E4,0x00C4},␊ |
| 447 | {0x00E5,0x00C5},␊ |
| 448 | {0x00E9,0x00C9},␊ |
| 449 | {0x00E6,0x00C6},␊ |
| 450 | {0x00E6,0x00C6},␊ |
| 451 | {0x00F4,0x00D4},␊ |
| 452 | {0x00F6,0x00D6},␊ |
| 453 | {0x00F2,0x00D2},␊ |
| 454 | {0x00FB,0x00DB},␊ |
| 455 | {0x00F9,0x00D9},␊ |
| 456 | {0x00FF,0x0178},␊ |
| 457 | {0x00F6,0x00D6},␊ |
| 458 | {0x00FC,0x00DC},␊ |
| 459 | {0x00F8,0x00D8},␊ |
| 460 | {0x00A3,0x00A3},␊ |
| 461 | {0x00F8,0x00D8},␊ |
| 462 | {0x00D7,0x00D7},␊ |
| 463 | {0x0192,0x0191},␊ |
| 464 | {0x00E1,0x00C1},␊ |
| 465 | {0x00ED,0x00CD},␊ |
| 466 | {0x00F3,0x00D3},␊ |
| 467 | {0x00FA,0x00DA},␊ |
| 468 | {0x00F1,0x00D1},␊ |
| 469 | {0x00F1,0x00D1},␊ |
| 470 | {0x00AA,0x00AA},␊ |
| 471 | {0x00BA,0x00BA},␊ |
| 472 | {0x00BF,0x00BF},␊ |
| 473 | {0x00AE,0x00AE},␊ |
| 474 | {0x00AC,0x00AC},␊ |
| 475 | {0x00BD,0x00BD},␊ |
| 476 | {0x00BC,0x00BC},␊ |
| 477 | {0x00A1,0x00A1},␊ |
| 478 | {0x00AB,0x00AB},␊ |
| 479 | {0x00BB,0x00BB},␊ |
| 480 | {0x2591,0x2591},␊ |
| 481 | {0x2592,0x2592},␊ |
| 482 | {0x2593,0x2593},␊ |
| 483 | {0x2502,0x2502},␊ |
| 484 | {0x2524,0x2524},␊ |
| 485 | {0x00E1,0x00C1},␊ |
| 486 | {0x00E2,0x00C2},␊ |
| 487 | {0x00E0,0x00C0},␊ |
| 488 | {0x00A9,0x00A9},␊ |
| 489 | {0x2563,0x2563},␊ |
| 490 | {0x2551,0x2551},␊ |
| 491 | {0x2557,0x2557},␊ |
| 492 | {0x255D,0x255D},␊ |
| 493 | {0x00A2,0x00A2},␊ |
| 494 | {0x00A5,0x00A5},␊ |
| 495 | {0x2510,0x2510},␊ |
| 496 | {0x2514,0x2514},␊ |
| 497 | {0x2534,0x2534},␊ |
| 498 | {0x252C,0x252C},␊ |
| 499 | {0x251C,0x251C},␊ |
| 500 | {0x2500,0x2500},␊ |
| 501 | {0x253C,0x253C},␊ |
| 502 | {0x00E3,0x00C3},␊ |
| 503 | {0x00E3,0x00C3},␊ |
| 504 | {0x255A,0x255A},␊ |
| 505 | {0x2554,0x2554},␊ |
| 506 | {0x2569,0x2569},␊ |
| 507 | {0x2566,0x2566},␊ |
| 508 | {0x2560,0x2560},␊ |
| 509 | {0x2550,0x2550},␊ |
| 510 | {0x256C,0x256C},␊ |
| 511 | {0x00A4,0x00A4},␊ |
| 512 | {0x00F0,0x00D0},␊ |
| 513 | {0x00F0,0x00D0},␊ |
| 514 | {0x00EA,0x00CA},␊ |
| 515 | {0x00EB,0x00CB},␊ |
| 516 | {0x00E8,0x00C8},␊ |
| 517 | {0x0131,0x0049},␊ |
| 518 | {0x00ED,0x00CD},␊ |
| 519 | {0x00EE,0x00CE},␊ |
| 520 | {0x00EF,0x00CF},␊ |
| 521 | {0x2518,0x2518},␊ |
| 522 | {0x250C,0x250C},␊ |
| 523 | {0x2588,0x2588},␊ |
| 524 | {0x2584,0x2584},␊ |
| 525 | {0x00A6,0x00A6},␊ |
| 526 | {0x00EC,0x00CC},␊ |
| 527 | {0x2580,0x2580},␊ |
| 528 | {0x00F3,0x00D3},␊ |
| 529 | {0x00DF,0x00DF},␊ |
| 530 | {0x00F4,0x00D4},␊ |
| 531 | {0x00F2,0x00D2},␊ |
| 532 | {0x00F5,0x00D5},␊ |
| 533 | {0x00F5,0x00D5},␊ |
| 534 | {0x00B5,0x00B5},␊ |
| 535 | {0x00FE,0x00DE},␊ |
| 536 | {0x00FE,0x00DE},␊ |
| 537 | {0x00FA,0x00DA},␊ |
| 538 | {0x00FB,0x00DB},␊ |
| 539 | {0x00F9,0x00D9},␊ |
| 540 | {0x00FD,0x00DD},␊ |
| 541 | {0x00FD,0x00DD},␊ |
| 542 | {0x00AF,0x00AF},␊ |
| 543 | {0x00B4,0x00B4},␊ |
| 544 | {0x00AD,0x00AD},␊ |
| 545 | {0x00B1,0x00B1},␊ |
| 546 | {0x2017,0x2017},␊ |
| 547 | {0x00BE,0x00BE},␊ |
| 548 | {0x00B6,0x00B6},␊ |
| 549 | {0x00A7,0x00A7},␊ |
| 550 | {0x00F7,0x00F7},␊ |
| 551 | {0x00B8,0x00B8},␊ |
| 552 | {0x00B0,0x00B0},␊ |
| 553 | {0x00A8,0x00A8},␊ |
| 554 | {0x00B7,0x00B7},␊ |
| 555 | {0x00B9,0x00B9},␊ |
| 556 | {0x00B3,0x00B3},␊ |
| 557 | {0x00B2,0x00B2},␊ |
| 558 | {0x25A0,0x25A0},␊ |
| 559 | {0x00A0,0x00A0}␊ |
| 560 | };␊ |
| 561 | ␊ |
| 562 | static int␊ |
| 563 | checkname (uint16_t *ucsname, int ucslen, struct direntry *dirp, uint16_t *vfatname)␊ |
| 564 | {␊ |
| 565 | ␉uint16_t tmp[15];␊ |
| 566 | ␉if (vfatname[0])␊ |
| 567 | ␉{␊ |
| 568 | ␉␉int i;␊ |
| 569 | ␉␉for (i=0;vfatname[i];i++);␊ |
| 570 | ␉␉return !FastUnicodeCompare (ucsname, ucslen, vfatname, i, OSLittleEndian);␊ |
| 571 | ␉}␊ |
| 572 | ␉else␊ |
| 573 | ␉{␊ |
| 574 | ␉␉int i, j, k;␊ |
| 575 | ␉␉for (i=7;i>=0;i--)␊ |
| 576 | ␉␉␉if (dirp->deName[i]!=' ')␊ |
| 577 | ␉␉␉␉break;␊ |
| 578 | ␉␉j=i+1;␊ |
| 579 | ␉␉tmp[i+1]=0;␊ |
| 580 | ␉␉for(;i>=0;i--)␊ |
| 581 | ␉␉␉tmp[i]=SWAP_LE16((dirp->deName[i]>=128)?cp850[dirp->deName[i]-128][0]:tolower(dirp->deName[i]));␊ |
| 582 | ␉␉for (i=2;i>=0;i--)␊ |
| 583 | ␉␉␉if (dirp->deName[8+i]!=' ')␊ |
| 584 | ␉␉␉␉break;␊ |
| 585 | ␉␉if (i>=0)␊ |
| 586 | ␉␉{␊ |
| 587 | ␉␉␉tmp[j++]='.';␊ |
| 588 | ␉␉␉tmp[j+i+1]=0;␊ |
| 589 | ␉␉␉k=j+i+1;␊ |
| 590 | ␉␉␉for(;i>=0;i--)␊ |
| 591 | ␉␉␉␉tmp[j+i]=SWAP_LE16((dirp->deName[i+8]>=128)?cp850[dirp->deName[i+8]-128][0]:tolower(dirp->deName[i+8]));␊ |
| 592 | ␉␉␉j=k;␊ |
| 593 | ␉␉}␊ |
| 594 | ␉␉return !FastUnicodeCompare (ucsname, ucslen, tmp, j, OSLittleEndian);␊ |
| 595 | ␉}␊ |
| 596 | ␉␊ |
| 597 | }␊ |
| 598 | ␊ |
| 599 | static struct direntry *␊ |
| 600 | getdirpfrompath (CICell ih, char *dirspec, uint8_t *buf)␊ |
| 601 | {␊ |
| 602 | ␉struct msdosdirstate st;␊ |
| 603 | ␉struct direntry *dirp;␊ |
| 604 | ␉uint8_t * ptr;␊ |
| 605 | ␉uint8_t *slash;␊ |
| 606 | ␉char c;␊ |
| 607 | ␉uint16_t␉␉vfatname[WIN_MAXLEN+2*WIN_CHARS];␊ |
| 608 | ␉uint16_t ucsname[WIN_MAXLEN+1];␊ |
| 609 | ␉uint16_t ucslen;␊ |
| 610 | ␉int ucslenhost;␊ |
| 611 | ␉initRoot (&st);␊ |
| 612 | ␉st.buf = (struct direntry *)buf;␊ |
| 613 | ␉ptr=(uint8_t*)dirspec;␊ |
| 614 | ␉for (slash=ptr;*slash && *slash!='/';slash++);␊ |
| 615 | ␉c=*slash;␊ |
| 616 | ␉*slash=0;␊ |
| 617 | ␉utf_decodestr (ptr, ucsname, &ucslen, WIN_MAXLEN, OSLittleEndian);␊ |
| 618 | ␉ucslenhost = OSReadLittleInt16 (&ucslen,0);␊ |
| 619 | ␉ucsname[ucslenhost]=0;␊ |
| 620 | ␉*slash=c;␉␊ |
| 621 | ␉while ((dirp = getnextdirent (ih, vfatname, &st)))␊ |
| 622 | ␉{␊ |
| 623 | ␉␉if (checkname (ucsname, ucslenhost, dirp, vfatname))␊ |
| 624 | ␉␉{␊ |
| 625 | ␉␉␉for (;*ptr && *ptr!='/';ptr++);␊ |
| 626 | ␉␉␉if (!*ptr)␊ |
| 627 | ␉␉␉␉return dirp;␊ |
| 628 | ␉␉␉ptr++;␊ |
| 629 | ␉␉␉if (!*ptr)␊ |
| 630 | ␉␉␉␉return dirp;␊ |
| 631 | ␉␉␉for (slash=ptr;*slash && *slash!='/';slash++);␊ |
| 632 | ␉␉␉c=*slash;␊ |
| 633 | ␉␉␉*slash=0;␊ |
| 634 | ␉␉␉utf_decodestr (ptr, ucsname, &ucslen, WIN_MAXLEN, OSLittleEndian);␊ |
| 635 | ␉␉␉ucslenhost = OSReadLittleInt16 (&ucslen,0);␊ |
| 636 | ␉␉␉ucsname[ucslenhost]=0;␊ |
| 637 | ␉␉␉*slash=c;␊ |
| 638 | ␉␉␉if (!(dirp->deAttributes & ATTR_DIRECTORY))␊ |
| 639 | ␉␉␉␉return 0;␊ |
| 640 | ␉␉␉st.root16 = 0;␊ |
| 641 | ␉␉␉st.vfatchecksum = 0;␊ |
| 642 | ␉␉␉st.nument = 0;␊ |
| 643 | ␉␉␉st.cluster = OSReadLittleInt16 ((dirp->deStartCluster),0);␊ |
| 644 | ␉␉␉if (msdosfatbits == 32)␊ |
| 645 | ␉␉␉␉st.cluster |= ((uint32_t)OSReadLittleInt16 ((dirp->deHighClust),0)) <<16;␊ |
| 646 | ␉␉␉st.vfatnumber = 0;␊ |
| 647 | ␉␉}␊ |
| 648 | ␉}␊ |
| 649 | ␉return 0;␊ |
| 650 | }␊ |
| 651 | ␊ |
| 652 | long MSDOSGetDirEntry(CICell ih, char * dirPath, long long * dirIndex,␊ |
| 653 | ␉␉␉␉␉ char ** name, long * flags, long * time,␊ |
| 654 | ␉␉␉␉␉ FinderInfo * finderInfo, long * infoValid)␊ |
| 655 | {␊ |
| 656 | ␉struct msdosdirstate *st;␊ |
| 657 | ␉struct direntry *dirp;␊ |
| 658 | ␉uint16_t␉␉vfatname[WIN_MAXLEN+2*WIN_CHARS];␊ |
| 659 | ␉if (MSDOSInitPartition (ih)<0)␊ |
| 660 | ␉␉return -1;␊ |
| 661 | ␉if (dirPath[0] == '/')␊ |
| 662 | ␉␉dirPath++;␊ |
| 663 | ␉st = (struct msdosdirstate *)(long) *dirIndex;␊ |
| 664 | ␉if (!st)␊ |
| 665 | ␉{␊ |
| 666 | ␉␉st=malloc (sizeof (struct msdosdirstate));␊ |
| 667 | ␉␉if (!st)␊ |
| 668 | ␉␉{␊ |
| 669 | ␉␉␉return -1;␊ |
| 670 | ␉␉}␊ |
| 671 | ␉␉if (dirPath[0])␊ |
| 672 | ␉␉{␊ |
| 673 | ␉␉␉uint8_t *buf=malloc(msdosclustersize);␊ |
| 674 | ␉␉␉if (!buf)␊ |
| 675 | ␉␉␉{␊ |
| 676 | ␉␉␉␉free (st);␊ |
| 677 | ␉␉␉␉return -1;␊ |
| 678 | ␉␉␉}␊ |
| 679 | ␉␉␉dirp = getdirpfrompath (ih, dirPath, buf);␊ |
| 680 | ␉␉␉if (!dirp || !(dirp->deAttributes & ATTR_DIRECTORY))␊ |
| 681 | ␉␉␉{␊ |
| 682 | ␉␉␉␉free (buf);␊ |
| 683 | ␉␉␉␉free (st);␊ |
| 684 | ␉␉␉␉return -1;␊ |
| 685 | ␉␉␉}␊ |
| 686 | ␉␉␉st->buf = (struct direntry *)buf;␊ |
| 687 | ␉␉␉st->root16 = 0;␊ |
| 688 | ␉␉␉st->vfatchecksum = 0;␊ |
| 689 | ␉␉␉st->nument = 0;␊ |
| 690 | ␉␉␉st->cluster = OSReadLittleInt16 ((dirp->deStartCluster),0);␊ |
| 691 | ␉␉␉st->vfatnumber = 0;␊ |
| 692 | ␉␉␉if (msdosfatbits == 32)␊ |
| 693 | ␉␉␉␉st->cluster |= ((uint32_t)OSReadLittleInt16 ((dirp->deHighClust),0)) <<16;␊ |
| 694 | ␉␉}␊ |
| 695 | ␉␉else␊ |
| 696 | ␉␉␉initRoot (st);␊ |
| 697 | ␉␉*dirIndex = (long long) (long) st;␊ |
| 698 | ␉}␊ |
| 699 | ␉while((dirp = getnextdirent (ih, vfatname, st))&& (dirp->deAttributes & ATTR_VOLUME));␊ |
| 700 | ␉if (!dirp)␊ |
| 701 | ␉{␊ |
| 702 | ␉␉free (st->buf);␊ |
| 703 | ␉␉free (st);␊ |
| 704 | ␉␉return -1;␊ |
| 705 | ␉}␊ |
| 706 | ␉if (vfatname[0])␊ |
| 707 | ␉{␊ |
| 708 | ␉␉int i;␊ |
| 709 | ␉␉for (i=0;vfatname[i];i++);␊ |
| 710 | ␉␉*name = malloc (256);␊ |
| 711 | ␉␉if (!*name) ␊ |
| 712 | ␉␉{␊ |
| 713 | ␉␉␉free (st->buf);␊ |
| 714 | ␉␉␉free (st);␊ |
| 715 | ␉␉␉return -1;␊ |
| 716 | ␉␉}␊ |
| 717 | ␉␉utf_encodestr(vfatname, i, (u_int8_t *)*name, 255, OSLittleEndian );␉␊ |
| 718 | ␉}␊ |
| 719 | ␉else␊ |
| 720 | ␉{␊ |
| 721 | ␉␉int i, j, k;␊ |
| 722 | ␉␉uint16_t tmp[13];␊ |
| 723 | ␉␉*name = malloc (26);␊ |
| 724 | ␉␉if (!*name) ␊ |
| 725 | ␉␉{␊ |
| 726 | ␉␉␉free (st->buf);␊ |
| 727 | ␉␉␉free (st);␊ |
| 728 | ␉␉␉return -1;␊ |
| 729 | ␉␉}␊ |
| 730 | ␉␉for (i=7;i>=0;i--)␊ |
| 731 | ␉␉␉if (dirp->deName[i]!=' ')␊ |
| 732 | ␉␉␉␉break;␊ |
| 733 | ␉␉j=i+1;␊ |
| 734 | ␉␉tmp[i+1]=0;␊ |
| 735 | ␉␉for(;i>=0;i--)␊ |
| 736 | ␉␉␉tmp[i]=(dirp->deName[i]>=128)?cp850[dirp->deName[i]-128][0]:tolower(dirp->deName[i]);␊ |
| 737 | ␉␉for (i=2;i>=0;i--)␊ |
| 738 | ␉␉␉if (dirp->deName[8+i]!=' ')␊ |
| 739 | ␉␉␉␉break;␊ |
| 740 | ␉␉␊ |
| 741 | ␉␉if (i>=0)␊ |
| 742 | ␉␉{␊ |
| 743 | ␉␉␉tmp[j++]='.';␊ |
| 744 | ␉␉␉tmp[j+i+1]=0;␊ |
| 745 | ␉␉␉k=j+i+1;␊ |
| 746 | ␉␉␉for(;i>=0;i--)␊ |
| 747 | ␉␉␉␉tmp[j+i]=(dirp->deName[i]>=128)?cp850[dirp->deName[i+8]-128][0]:tolower(dirp->deName[i+8]);␊ |
| 748 | ␉␉␉j=k;␊ |
| 749 | ␉␉}␊ |
| 750 | ␉␉␊ |
| 751 | ␉␉utf_encodestr(tmp, j, (uint8_t*)*name, 25, OSHostByteOrder() );␊ |
| 752 | ␉}␊ |
| 753 | ␉if (dirp->deAttributes & ATTR_DIRECTORY)␊ |
| 754 | ␉␉*flags = kFileTypeDirectory;␊ |
| 755 | ␉else␊ |
| 756 | ␉␉*flags = kFileTypeFlat;␊ |
| 757 | ␉␊ |
| 758 | ␉// Calculate a fake timestamp using modification date and time values.␊ |
| 759 | ␉*time = ((dirp->deMDate & 0x7FFF) << 16) + dirp->deMTime;␊ |
| 760 | ␉␊ |
| 761 | ␉if (infoValid)␊ |
| 762 | ␉␉*infoValid = 1;␊ |
| 763 | ␊ |
| 764 | ␉return 0;␊ |
| 765 | }␊ |
| 766 | ␊ |
| 767 | long ␊ |
| 768 | MSDOSReadFile(CICell ih, char * filePath, void *base, uint64_t offset, uint64_t length)␊ |
| 769 | {␊ |
| 770 | ␉uint8_t *buf;␊ |
| 771 | ␉off_t cluster;␊ |
| 772 | ␉uint64_t size;␊ |
| 773 | ␉uint64_t nskip;␊ |
| 774 | ␉int toread, wastoread;␊ |
| 775 | ␉char *ptr = (char *)base;␊ |
| 776 | ␉struct direntry *dirp;␊ |
| 777 | ␉uint64_t i;␊ |
| 778 | char devStr[12];␊ |
| 779 | ␊ |
| 780 | ␉if (MSDOSInitPartition (ih)<0)␊ |
| 781 | ␉␉return -1;␊ |
| 782 | ␉if (filePath[0] == '/')␊ |
| 783 | ␉␉filePath++;␊ |
| 784 | ␉buf = malloc(msdosclustersize);␊ |
| 785 | ␉if (!buf)␊ |
| 786 | ␉{␊ |
| 787 | ␉␉return -1;␊ |
| 788 | ␉}␊ |
| 789 | ␉dirp = getdirpfrompath (ih, filePath, buf);␊ |
| 790 | ␉␊ |
| 791 | ␉if (!dirp || (dirp->deAttributes & ATTR_DIRECTORY))␊ |
| 792 | ␉{␊ |
| 793 | ␉␉free (buf);␊ |
| 794 | ␉␉return -1;␊ |
| 795 | ␉}␊ |
| 796 | ␉cluster = OSReadLittleInt16 ((dirp->deStartCluster),0);␊ |
| 797 | ␉if (msdosfatbits == 32)␊ |
| 798 | ␉␉cluster |= ((uint32_t)OSReadLittleInt16 ((dirp->deHighClust),0)) <<16;␊ |
| 799 | ␉size = (uint32_t)OSReadLittleInt32 ((dirp->deFileSize),0);␊ |
| 800 | ␉if (size<=offset)␊ |
| 801 | ␉{␊ |
| 802 | ␉␉free (buf);␊ |
| 803 | ␉␉return -1;␊ |
| 804 | ␉}␊ |
| 805 | ␉nskip=offset/msdosclustersize;␊ |
| 806 | ␉for (i=0;i<nskip;i++)␊ |
| 807 | ␉␉msdosreadcluster (ih, 0, 0, &cluster);␊ |
| 808 | ␉msdosreadcluster (ih, buf, msdosclustersize, &cluster);␊ |
| 809 | ␉toread=length;␊ |
| 810 | ␉if (length==0 || length>size-offset)␊ |
| 811 | ␉␉toread=size-offset;␊ |
| 812 | ␉wastoread=toread;␊ |
| 813 | ␉bcopy (buf+(offset%msdosclustersize),ptr,MIN((msdosclustersize-(offset%msdosclustersize)),(unsigned)toread));␊ |
| 814 | ␉ptr+=msdosclustersize-(offset%msdosclustersize);␊ |
| 815 | ␉toread-=msdosclustersize-(offset%msdosclustersize);␊ |
| 816 | ␉while (toread>0 && msdosreadcluster (ih, (uint8_t *)ptr, MIN(msdosclustersize,toread), &cluster))␊ |
| 817 | ␉{␊ |
| 818 | ␉␉ptr+=msdosclustersize;␊ |
| 819 | ␉␉toread-=msdosclustersize;␊ |
| 820 | ␉}␊ |
| 821 | ␉␊ |
| 822 | ␉getDeviceDescription(ih, devStr);␊ |
| 823 | /*␊ |
| 824 | ␉verbose("Read FAT%d file: [%s/%s] %d bytes.\n",␊ |
| 825 | msdosfatbits, devStr, filePath, (uint32_t)( toread<0 ) ? wastoread : wastoread-toread);␊ |
| 826 | */␊ |
| 827 | ␉free (buf);␊ |
| 828 | ␉if (toread<0)␊ |
| 829 | ␉␉return wastoread;␊ |
| 830 | ␉else␊ |
| 831 | ␉␉return wastoread-toread;␊ |
| 832 | }␊ |
| 833 | ␊ |
| 834 | long ␊ |
| 835 | MSDOSGetFileBlock(CICell ih, char *filePath, unsigned long long *firstBlock)␊ |
| 836 | {␊ |
| 837 | ␉uint8_t *buf;␊ |
| 838 | ␉off_t cluster;␊ |
| 839 | ␉struct direntry *dirp;␊ |
| 840 | ␉if (MSDOSInitPartition (ih)<0)␊ |
| 841 | ␉␉return -1;␊ |
| 842 | ␉if (filePath[0] == '/')␊ |
| 843 | ␉␉filePath++;␊ |
| 844 | ␉buf = malloc(msdosclustersize);␊ |
| 845 | ␉if (!buf)␊ |
| 846 | ␉{␊ |
| 847 | ␉␉return -1;␊ |
| 848 | ␉}␊ |
| 849 | ␉dirp = getdirpfrompath (ih, filePath, buf);␊ |
| 850 | ␉if (!dirp || (dirp->deAttributes & ATTR_DIRECTORY))␊ |
| 851 | ␉{␊ |
| 852 | ␉␉free (buf);␊ |
| 853 | ␉␉return -1;␊ |
| 854 | ␉}␊ |
| 855 | ␉cluster = OSReadLittleInt16 ((dirp->deStartCluster),0);␊ |
| 856 | ␉if (msdosfatbits == 32)␊ |
| 857 | ␉␉cluster |= ((uint32_t)OSReadLittleInt16 ((dirp->deHighClust),0)) <<16;␊ |
| 858 | ␉␊ |
| 859 | ␉off_t clusn;␊ |
| 860 | ␉␊ |
| 861 | ␉switch (msdosfatbits) {␊ |
| 862 | ␉␉case 32:␊ |
| 863 | ␉␉␉if (cluster < CLUST_FIRST ||cluster >= CLUST_RSRVD32)␊ |
| 864 | ␉␉␉␉return -1;␊ |
| 865 | ␉␉␉clusn = cluster - CLUST_FIRST;␊ |
| 866 | ␉␉␉break;␊ |
| 867 | ␉␉case 16:␊ |
| 868 | ␉␉␉if (cluster < CLUST_FIRST ||cluster >= CLUST_RSRVD16)␊ |
| 869 | ␉␉␉␉return 0;␊ |
| 870 | ␉␉␉clusn = cluster - CLUST_FIRST;␊ |
| 871 | ␉␉␉break;␉␉␉␊ |
| 872 | ␉␉case 12:␊ |
| 873 | ␉␉␉␊ |
| 874 | ␉␉␉if (cluster < CLUST_FIRST ||cluster >= CLUST_RSRVD12)␊ |
| 875 | ␉␉␉␉return 0;␊ |
| 876 | ␉␉␉clusn = cluster - CLUST_FIRST;␊ |
| 877 | ␉␉␉break;␊ |
| 878 | ␉␉default:␊ |
| 879 | ␉␉␉return 0;␊ |
| 880 | ␉}␊ |
| 881 | ␉␊ |
| 882 | ␉*firstBlock = ((msdosressector +␊ |
| 883 | ␉␉␉␉ (msdosnfats * msdosfatsecs))*msdosbps + clusn * msdosclustersize)/512;␊ |
| 884 | ␉free (buf);␊ |
| 885 | ␉return 0;␊ |
| 886 | }␊ |
| 887 | ␊ |
| 888 | ␊ |
| 889 | long MSDOSLoadFile(CICell ih, char * filePath)␊ |
| 890 | {␊ |
| 891 | ␉return MSDOSReadFile(ih, filePath, (void *)gFSLoadAddress, 0, 0);␊ |
| 892 | }␊ |
| 893 | ␊ |
| 894 | /* Fix up volume label. */␊ |
| 895 | static void␊ |
| 896 | fixLabel(uint8_t *label, char *str, long strMaxLen)␊ |
| 897 | {␊ |
| 898 | ␉int␉␉␉i, len;␊ |
| 899 | ␉uint16_t␉␉labelucs[13];␊ |
| 900 | ␉//unsigned char␉␉labelUTF8[LABEL_LENGTH*3];␊ |
| 901 | ␉␊ |
| 902 | ␉/* Convert leading 0x05 to 0xE5 for multibyte languages like Japanese */␊ |
| 903 | ␉if (label[0] == 0x05)␊ |
| 904 | ␉label[0] = 0xE5;␊ |
| 905 | ␉␊ |
| 906 | ␉/* Remove any trailing spaces */␊ |
| 907 | ␉for (i=LABEL_LENGTH-1; i>=0; --i) {␊ |
| 908 | ␉if (label[i] == ' ')␊ |
| 909 | label[i] = 0;␊ |
| 910 | ␉else␊ |
| 911 | ␉␉break;␊ |
| 912 | ␉}␊ |
| 913 | ␉labelucs[i++]=0;␊ |
| 914 | ␉len=i;␊ |
| 915 | ␉for (;i>=0;--i)␊ |
| 916 | ␉␉labelucs[i]=label[i]>=128?cp850[label[i]-128][1]:(label[i]);␊ |
| 917 | ␉␊ |
| 918 | ␉utf_encodestr(labelucs, len, (uint8_t *)str, strMaxLen, OSHostByteOrder() );␊ |
| 919 | }␊ |
| 920 | ␊ |
| 921 | ␊ |
| 922 | void␊ |
| 923 | MSDOSGetDescription(CICell ih, char *str, long strMaxLen)␊ |
| 924 | {␊ |
| 925 | ␉struct direntry␉␉*dirp;␊ |
| 926 | ␉uint8_t␉␉␉label[LABEL_LENGTH+1];␊ |
| 927 | ␉uint16_t␉␉vfatlabel[WIN_MAXLEN+2*WIN_CHARS];␊ |
| 928 | ␉struct msdosdirstate st;␊ |
| 929 | ␉int labelfound = 0;␊ |
| 930 | ␊ |
| 931 | ␉if (MSDOSInitPartition (ih)<0)␊ |
| 932 | ␉{␊ |
| 933 | ␉␉str[0]=0;␊ |
| 934 | ␉␉return;␊ |
| 935 | ␉}␊ |
| 936 | ␊ |
| 937 | ␉label[0] = '\0';␊ |
| 938 | ␉␊ |
| 939 | ␉initRoot (&st);␊ |
| 940 | ␉st.buf = malloc(msdosclustersize);␊ |
| 941 | ␉if (!st.buf)␊ |
| 942 | ␉{␊ |
| 943 | ␉␉return;␊ |
| 944 | ␉}␊ |
| 945 | ␉while ((dirp = getnextdirent (ih, vfatlabel, &st)))␊ |
| 946 | ␉␉if (dirp->deAttributes & ATTR_VOLUME) {␊ |
| 947 | ␉␉␉strncpy((char *)label, (char *)dirp->deName, LABEL_LENGTH);␊ |
| 948 | ␉␉␉labelfound = 1;␊ |
| 949 | ␉␉␉break;␊ |
| 950 | ␉␉}␊ |
| 951 | ␉␉␊ |
| 952 | ␉free(st.buf);␉␉␊ |
| 953 | ␊ |
| 954 | ␉if (vfatlabel[0] && labelfound)␊ |
| 955 | ␉{␊ |
| 956 | ␉␉int i;␊ |
| 957 | ␉␉for (i=0;vfatlabel[i];i++);␊ |
| 958 | ␉␉utf_encodestr(vfatlabel, i, (u_int8_t *)str, strMaxLen, OSLittleEndian );␉␉␊ |
| 959 | ␉}␉␊ |
| 960 | ␉else if (labelfound)␊ |
| 961 | ␉␉fixLabel(label, str, strMaxLen);␊ |
| 962 | ␉␊ |
| 963 | ␉/* else look in the boot blocks */␊ |
| 964 | ␉if (!labelfound || str[0] == '\0')␊ |
| 965 | ␉{␊ |
| 966 | ␉␉char *buf = malloc (512);␊ |
| 967 | ␉␉if (!buf)␊ |
| 968 | ␉␉{␊ |
| 969 | ␉␉␉return;␊ |
| 970 | ␉␉}␊ |
| 971 | ␉␉union bootsector *bsp = (union bootsector *)buf;␊ |
| 972 | ␉␉Seek(ih, 0);␊ |
| 973 | ␉␉Read(ih, (long)buf, 512);␊ |
| 974 | ␉␉if (msdosfatbits == 32)␊ |
| 975 | ␉␉{␊ |
| 976 | ␉␉␉/* It's FAT32 */␊ |
| 977 | ␉␉␉strncpy((char *)label, (char *)((struct extboot *)bsp->bs710.bsExt)->exVolumeLabel, LABEL_LENGTH);␊ |
| 978 | ␉␉}␊ |
| 979 | ␉␉else if (msdosfatbits == 16)␊ |
| 980 | ␉␉{␊ |
| 981 | ␉␉␉strncpy((char *)label, (char *)((struct extboot *)bsp->bs50.bsExt)->exVolumeLabel, LABEL_LENGTH);␊ |
| 982 | ␉␉}␊ |
| 983 | ␉␉free (buf);␊ |
| 984 | ␉␉fixLabel(label, str, strMaxLen);␊ |
| 985 | ␉}␊ |
| 986 | ␊ |
| 987 | ␉return;␊ |
| 988 | }␊ |
| 989 | ␊ |
| 990 | long ␊ |
| 991 | MSDOSGetUUID(CICell ih, char *uuidStr)␊ |
| 992 | {␊ |
| 993 | ␉char *buf = malloc (512);␊ |
| 994 | ␉if (!buf)␊ |
| 995 | ␉{␊ |
| 996 | ␉␉return -1;␊ |
| 997 | ␉}␊ |
| 998 | ␉union bootsector *bsp = (union bootsector *)buf;␊ |
| 999 | ␉␊ |
| 1000 | ␉if (MSDOSInitPartition (ih)<0)␊ |
| 1001 | ␉{␊ |
| 1002 | ␉␉free (buf);␊ |
| 1003 | ␉␉return -1;␊ |
| 1004 | ␉}␊ |
| 1005 | ␉bzero (uuidStr, 16);␊ |
| 1006 | ␉Seek(ih, 0);␊ |
| 1007 | ␉Read(ih, (long)buf, 512);␊ |
| 1008 | ␉if (msdosfatbits == 32) { /* It's FAT32 */␊ |
| 1009 | ␉␉memcpy(uuidStr+12, (char *)((struct extboot *)bsp->bs710.bsExt)->exVolumeID, 4);␊ |
| 1010 | ␉}␊ |
| 1011 | ␉else if (msdosfatbits == 16) {␊ |
| 1012 | ␉␉memcpy(uuidStr+12, (char *)((struct extboot *)bsp->bs50.bsExt)->exVolumeID, 4);␊ |
| 1013 | ␉}␊ |
| 1014 | ␉free (buf);␊ |
| 1015 | return 0;␊ |
| 1016 | ␉␊ |
| 1017 | }␊ |
| 1018 | |
