| 1 |
/* |
| 2 |
* libhfs - library for reading and writing Macintosh HFS volumes |
| 3 |
* Copyright (C) 1996-1998 Robert Leslie |
| 4 |
* |
| 5 |
* This program is free software; you can redistribute it and/or modify |
| 6 |
* it under the terms of the GNU General Public License as published by |
| 7 |
* the Free Software Foundation; either version 2 of the License, or |
| 8 |
* (at your option) any later version. |
| 9 |
* |
| 10 |
* This program is distributed in the hope that it will be useful, |
| 11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 |
* GNU General Public License for more details. |
| 14 |
* |
| 15 |
* You should have received a copy of the GNU General Public License |
| 16 |
* along with this program; if not, write to the Free Software |
| 17 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 18 |
* |
| 19 |
*/ |
| 20 |
|
| 21 |
# ifdef HAVE_CONFIG_H |
| 22 |
# include "config.h" |
| 23 |
# endif |
| 24 |
|
| 25 |
# include <stdlib.h> |
| 26 |
# include <string.h> |
| 27 |
# include <errno.h> |
| 28 |
|
| 29 |
# include "libhfs.h" |
| 30 |
# include "low.h" |
| 31 |
# include "data.h" |
| 32 |
# include "block.h" |
| 33 |
# include "file.h" |
| 34 |
|
| 35 |
/* |
| 36 |
* NAME: low->getddr() |
| 37 |
* DESCRIPTION: read a driver descriptor record |
| 38 |
*/ |
| 39 |
int l_getddr(hfsvol *vol, Block0 *ddr) |
| 40 |
{ |
| 41 |
block b; |
| 42 |
const byte *ptr = b; |
| 43 |
int i; |
| 44 |
|
| 45 |
if (b_readpb(vol, 0, &b, 1) == -1) |
| 46 |
goto fail; |
| 47 |
|
| 48 |
d_fetchsw(&ptr, &ddr->sbSig); |
| 49 |
d_fetchsw(&ptr, &ddr->sbBlkSize); |
| 50 |
d_fetchsl(&ptr, &ddr->sbBlkCount); |
| 51 |
d_fetchsw(&ptr, &ddr->sbDevType); |
| 52 |
d_fetchsw(&ptr, &ddr->sbDevId); |
| 53 |
d_fetchsl(&ptr, &ddr->sbData); |
| 54 |
d_fetchsw(&ptr, &ddr->sbDrvrCount); |
| 55 |
d_fetchsl(&ptr, &ddr->ddBlock); |
| 56 |
d_fetchsw(&ptr, &ddr->ddSize); |
| 57 |
d_fetchsw(&ptr, &ddr->ddType); |
| 58 |
|
| 59 |
for (i = 0; i < 243; ++i) |
| 60 |
d_fetchsw(&ptr, &ddr->ddPad[i]); |
| 61 |
|
| 62 |
ASSERT(ptr - b == HFS_BLOCKSZ); |
| 63 |
|
| 64 |
return 0; |
| 65 |
|
| 66 |
fail: |
| 67 |
return -1; |
| 68 |
} |
| 69 |
|
| 70 |
/* |
| 71 |
* NAME: low->putddr() |
| 72 |
* DESCRIPTION: write a driver descriptor record |
| 73 |
*/ |
| 74 |
int l_putddr(hfsvol *vol, const Block0 *ddr) |
| 75 |
{ |
| 76 |
block b; |
| 77 |
byte *ptr = b; |
| 78 |
int i; |
| 79 |
|
| 80 |
d_storesw(&ptr, ddr->sbSig); |
| 81 |
d_storesw(&ptr, ddr->sbBlkSize); |
| 82 |
d_storesl(&ptr, ddr->sbBlkCount); |
| 83 |
d_storesw(&ptr, ddr->sbDevType); |
| 84 |
d_storesw(&ptr, ddr->sbDevId); |
| 85 |
d_storesl(&ptr, ddr->sbData); |
| 86 |
d_storesw(&ptr, ddr->sbDrvrCount); |
| 87 |
d_storesl(&ptr, ddr->ddBlock); |
| 88 |
d_storesw(&ptr, ddr->ddSize); |
| 89 |
d_storesw(&ptr, ddr->ddType); |
| 90 |
|
| 91 |
for (i = 0; i < 243; ++i) |
| 92 |
d_storesw(&ptr, ddr->ddPad[i]); |
| 93 |
|
| 94 |
ASSERT(ptr - b == HFS_BLOCKSZ); |
| 95 |
|
| 96 |
if (b_writepb(vol, 0, &b, 1) == -1) |
| 97 |
goto fail; |
| 98 |
|
| 99 |
return 0; |
| 100 |
|
| 101 |
fail: |
| 102 |
return -1; |
| 103 |
} |
| 104 |
|
| 105 |
/* |
| 106 |
* NAME: low->getpmentry() |
| 107 |
* DESCRIPTION: read a partition map entry |
| 108 |
*/ |
| 109 |
int l_getpmentry(hfsvol *vol, ApplePartition *map, unsigned long bnum) |
| 110 |
{ |
| 111 |
block b; |
| 112 |
const byte *ptr = b; |
| 113 |
int i; |
| 114 |
|
| 115 |
if (b_readpb(vol, bnum, &b, 1) == -1) |
| 116 |
goto fail; |
| 117 |
|
| 118 |
d_fetchsw(&ptr, &map->pmSig); |
| 119 |
d_fetchsw(&ptr, &map->pmSigPad); |
| 120 |
d_fetchsl(&ptr, &map->pmMapBlkCnt); |
| 121 |
d_fetchsl(&ptr, &map->pmPyPartStart); |
| 122 |
d_fetchsl(&ptr, &map->pmPartBlkCnt); |
| 123 |
|
| 124 |
strncpy((char *) map->pmPartName, (const char *) ptr, 32); |
| 125 |
map->pmPartName[32] = 0; |
| 126 |
ptr += 32; |
| 127 |
|
| 128 |
strncpy((char *) map->pmParType, (const char *) ptr, 32); |
| 129 |
map->pmParType[32] = 0; |
| 130 |
ptr += 32; |
| 131 |
|
| 132 |
d_fetchsl(&ptr, &map->pmLgDataStart); |
| 133 |
d_fetchsl(&ptr, &map->pmDataCnt); |
| 134 |
d_fetchsl(&ptr, &map->pmPartStatus); |
| 135 |
d_fetchsl(&ptr, &map->pmLgBootStart); |
| 136 |
d_fetchsl(&ptr, &map->pmBootSize); |
| 137 |
d_fetchsl(&ptr, &map->pmBootAddr); |
| 138 |
d_fetchsl(&ptr, &map->pmBootAddr2); |
| 139 |
d_fetchsl(&ptr, &map->pmBootEntry); |
| 140 |
d_fetchsl(&ptr, &map->pmBootEntry2); |
| 141 |
d_fetchsl(&ptr, &map->pmBootCksum); |
| 142 |
|
| 143 |
strncpy((char *) map->pmProcessor, (const char *) ptr, 16); |
| 144 |
map->pmProcessor[16] = 0; |
| 145 |
ptr += 16; |
| 146 |
|
| 147 |
for (i = 0; i < 188; ++i) |
| 148 |
d_fetchsw(&ptr, &map->pmPad[i]); |
| 149 |
|
| 150 |
ASSERT(ptr - b == HFS_BLOCKSZ); |
| 151 |
|
| 152 |
return 0; |
| 153 |
|
| 154 |
fail: |
| 155 |
return -1; |
| 156 |
} |
| 157 |
|
| 158 |
/* |
| 159 |
* NAME: low->putpmentry() |
| 160 |
* DESCRIPTION: write a partition map entry |
| 161 |
*/ |
| 162 |
int l_putpmentry(hfsvol *vol, const ApplePartition *map, unsigned long bnum) |
| 163 |
{ |
| 164 |
block b; |
| 165 |
byte *ptr = b; |
| 166 |
int i; |
| 167 |
|
| 168 |
d_storesw(&ptr, map->pmSig); |
| 169 |
d_storesw(&ptr, map->pmSigPad); |
| 170 |
d_storesl(&ptr, map->pmMapBlkCnt); |
| 171 |
d_storesl(&ptr, map->pmPyPartStart); |
| 172 |
d_storesl(&ptr, map->pmPartBlkCnt); |
| 173 |
|
| 174 |
memset(ptr, 0, 32); |
| 175 |
strncpy((char *) ptr, (const char *) map->pmPartName, 32); |
| 176 |
ptr += 32; |
| 177 |
|
| 178 |
memset(ptr, 0, 32); |
| 179 |
strncpy((char *) ptr, (const char *) map->pmParType, 32); |
| 180 |
ptr += 32; |
| 181 |
|
| 182 |
d_storesl(&ptr, map->pmLgDataStart); |
| 183 |
d_storesl(&ptr, map->pmDataCnt); |
| 184 |
d_storesl(&ptr, map->pmPartStatus); |
| 185 |
d_storesl(&ptr, map->pmLgBootStart); |
| 186 |
d_storesl(&ptr, map->pmBootSize); |
| 187 |
d_storesl(&ptr, map->pmBootAddr); |
| 188 |
d_storesl(&ptr, map->pmBootAddr2); |
| 189 |
d_storesl(&ptr, map->pmBootEntry); |
| 190 |
d_storesl(&ptr, map->pmBootEntry2); |
| 191 |
d_storesl(&ptr, map->pmBootCksum); |
| 192 |
|
| 193 |
memset(ptr, 0, 16); |
| 194 |
strncpy((char *) ptr, (const char *) map->pmProcessor, 16); |
| 195 |
ptr += 16; |
| 196 |
|
| 197 |
for (i = 0; i < 188; ++i) |
| 198 |
d_storesw(&ptr, map->pmPad[i]); |
| 199 |
|
| 200 |
ASSERT(ptr - b == HFS_BLOCKSZ); |
| 201 |
|
| 202 |
if (b_writepb(vol, bnum, &b, 1) == -1) |
| 203 |
goto fail; |
| 204 |
|
| 205 |
return 0; |
| 206 |
|
| 207 |
fail: |
| 208 |
return -1; |
| 209 |
} |
| 210 |
|
| 211 |
/* |
| 212 |
* NAME: low->getbb() |
| 213 |
* DESCRIPTION: read a volume's boot blocks |
| 214 |
*/ |
| 215 |
int l_getbb(hfsvol *vol, BootBlkHdr *bb, byte *bootcode) |
| 216 |
{ |
| 217 |
block b; |
| 218 |
const byte *ptr = b; |
| 219 |
|
| 220 |
if (b_readlb(vol, 0, &b) == -1) |
| 221 |
goto fail; |
| 222 |
|
| 223 |
d_fetchsw(&ptr, &bb->bbID); |
| 224 |
d_fetchsl(&ptr, &bb->bbEntry); |
| 225 |
d_fetchsw(&ptr, &bb->bbVersion); |
| 226 |
d_fetchsw(&ptr, &bb->bbPageFlags); |
| 227 |
|
| 228 |
d_fetchstr(&ptr, bb->bbSysName, sizeof(bb->bbSysName)); |
| 229 |
d_fetchstr(&ptr, bb->bbShellName, sizeof(bb->bbShellName)); |
| 230 |
d_fetchstr(&ptr, bb->bbDbg1Name, sizeof(bb->bbDbg1Name)); |
| 231 |
d_fetchstr(&ptr, bb->bbDbg2Name, sizeof(bb->bbDbg2Name)); |
| 232 |
d_fetchstr(&ptr, bb->bbScreenName, sizeof(bb->bbScreenName)); |
| 233 |
d_fetchstr(&ptr, bb->bbHelloName, sizeof(bb->bbHelloName)); |
| 234 |
d_fetchstr(&ptr, bb->bbScrapName, sizeof(bb->bbScrapName)); |
| 235 |
|
| 236 |
d_fetchsw(&ptr, &bb->bbCntFCBs); |
| 237 |
d_fetchsw(&ptr, &bb->bbCntEvts); |
| 238 |
d_fetchsl(&ptr, &bb->bb128KSHeap); |
| 239 |
d_fetchsl(&ptr, &bb->bb256KSHeap); |
| 240 |
d_fetchsl(&ptr, &bb->bbSysHeapSize); |
| 241 |
d_fetchsw(&ptr, &bb->filler); |
| 242 |
d_fetchsl(&ptr, &bb->bbSysHeapExtra); |
| 243 |
d_fetchsl(&ptr, &bb->bbSysHeapFract); |
| 244 |
|
| 245 |
ASSERT(ptr - b == 148); |
| 246 |
|
| 247 |
if (bootcode) |
| 248 |
{ |
| 249 |
memcpy(bootcode, ptr, HFS_BOOTCODE1LEN); |
| 250 |
|
| 251 |
if (b_readlb(vol, 1, &b) == -1) |
| 252 |
goto fail; |
| 253 |
|
| 254 |
memcpy(bootcode + HFS_BOOTCODE1LEN, b, HFS_BOOTCODE2LEN); |
| 255 |
} |
| 256 |
|
| 257 |
return 0; |
| 258 |
|
| 259 |
fail: |
| 260 |
return -1; |
| 261 |
} |
| 262 |
|
| 263 |
/* |
| 264 |
* NAME: low->putbb() |
| 265 |
* DESCRIPTION: write a volume's boot blocks |
| 266 |
*/ |
| 267 |
int l_putbb(hfsvol *vol, const BootBlkHdr *bb, const byte *bootcode) |
| 268 |
{ |
| 269 |
block b; |
| 270 |
byte *ptr = b; |
| 271 |
|
| 272 |
d_storesw(&ptr, bb->bbID); |
| 273 |
d_storesl(&ptr, bb->bbEntry); |
| 274 |
d_storesw(&ptr, bb->bbVersion); |
| 275 |
d_storesw(&ptr, bb->bbPageFlags); |
| 276 |
|
| 277 |
d_storestr(&ptr, bb->bbSysName, sizeof(bb->bbSysName)); |
| 278 |
d_storestr(&ptr, bb->bbShellName, sizeof(bb->bbShellName)); |
| 279 |
d_storestr(&ptr, bb->bbDbg1Name, sizeof(bb->bbDbg1Name)); |
| 280 |
d_storestr(&ptr, bb->bbDbg2Name, sizeof(bb->bbDbg2Name)); |
| 281 |
d_storestr(&ptr, bb->bbScreenName, sizeof(bb->bbScreenName)); |
| 282 |
d_storestr(&ptr, bb->bbHelloName, sizeof(bb->bbHelloName)); |
| 283 |
d_storestr(&ptr, bb->bbScrapName, sizeof(bb->bbScrapName)); |
| 284 |
|
| 285 |
d_storesw(&ptr, bb->bbCntFCBs); |
| 286 |
d_storesw(&ptr, bb->bbCntEvts); |
| 287 |
d_storesl(&ptr, bb->bb128KSHeap); |
| 288 |
d_storesl(&ptr, bb->bb256KSHeap); |
| 289 |
d_storesl(&ptr, bb->bbSysHeapSize); |
| 290 |
d_storesw(&ptr, bb->filler); |
| 291 |
d_storesl(&ptr, bb->bbSysHeapExtra); |
| 292 |
d_storesl(&ptr, bb->bbSysHeapFract); |
| 293 |
|
| 294 |
ASSERT(ptr - b == 148); |
| 295 |
|
| 296 |
if (bootcode) |
| 297 |
memcpy(ptr, bootcode, HFS_BOOTCODE1LEN); |
| 298 |
else |
| 299 |
memset(ptr, 0, HFS_BOOTCODE1LEN); |
| 300 |
|
| 301 |
if (b_writelb(vol, 0, &b) == -1) |
| 302 |
goto fail; |
| 303 |
|
| 304 |
if (bootcode) |
| 305 |
memcpy(&b, bootcode + HFS_BOOTCODE1LEN, HFS_BOOTCODE2LEN); |
| 306 |
else |
| 307 |
memset(&b, 0, HFS_BOOTCODE2LEN); |
| 308 |
|
| 309 |
if (b_writelb(vol, 1, &b) == -1) |
| 310 |
goto fail; |
| 311 |
|
| 312 |
return 0; |
| 313 |
|
| 314 |
fail: |
| 315 |
return -1; |
| 316 |
} |
| 317 |
|
| 318 |
/* |
| 319 |
* NAME: low->getmdb() |
| 320 |
* DESCRIPTION: read a master directory block |
| 321 |
*/ |
| 322 |
int l_getmdb(hfsvol *vol, MDB *mdb, int backup) |
| 323 |
{ |
| 324 |
block b; |
| 325 |
const byte *ptr = b; |
| 326 |
int i; |
| 327 |
|
| 328 |
if (b_readlb(vol, backup ? vol->vlen - 2 : 2, &b) == -1) |
| 329 |
goto fail; |
| 330 |
|
| 331 |
d_fetchsw(&ptr, &mdb->drSigWord); |
| 332 |
d_fetchsl(&ptr, &mdb->drCrDate); |
| 333 |
d_fetchsl(&ptr, &mdb->drLsMod); |
| 334 |
d_fetchsw(&ptr, &mdb->drAtrb); |
| 335 |
d_fetchuw(&ptr, &mdb->drNmFls); |
| 336 |
d_fetchuw(&ptr, &mdb->drVBMSt); |
| 337 |
d_fetchuw(&ptr, &mdb->drAllocPtr); |
| 338 |
d_fetchuw(&ptr, &mdb->drNmAlBlks); |
| 339 |
d_fetchul(&ptr, &mdb->drAlBlkSiz); |
| 340 |
d_fetchul(&ptr, &mdb->drClpSiz); |
| 341 |
d_fetchuw(&ptr, &mdb->drAlBlSt); |
| 342 |
d_fetchsl(&ptr, &mdb->drNxtCNID); |
| 343 |
d_fetchuw(&ptr, &mdb->drFreeBks); |
| 344 |
|
| 345 |
d_fetchstr(&ptr, mdb->drVN, sizeof(mdb->drVN)); |
| 346 |
|
| 347 |
ASSERT(ptr - b == 64); |
| 348 |
|
| 349 |
d_fetchsl(&ptr, &mdb->drVolBkUp); |
| 350 |
d_fetchsw(&ptr, &mdb->drVSeqNum); |
| 351 |
d_fetchul(&ptr, &mdb->drWrCnt); |
| 352 |
d_fetchul(&ptr, &mdb->drXTClpSiz); |
| 353 |
d_fetchul(&ptr, &mdb->drCTClpSiz); |
| 354 |
d_fetchuw(&ptr, &mdb->drNmRtDirs); |
| 355 |
d_fetchul(&ptr, &mdb->drFilCnt); |
| 356 |
d_fetchul(&ptr, &mdb->drDirCnt); |
| 357 |
|
| 358 |
for (i = 0; i < 8; ++i) |
| 359 |
d_fetchsl(&ptr, &mdb->drFndrInfo[i]); |
| 360 |
|
| 361 |
ASSERT(ptr - b == 124); |
| 362 |
|
| 363 |
d_fetchuw(&ptr, &mdb->drEmbedSigWord); |
| 364 |
d_fetchuw(&ptr, &mdb->drEmbedExtent.xdrStABN); |
| 365 |
d_fetchuw(&ptr, &mdb->drEmbedExtent.xdrNumABlks); |
| 366 |
|
| 367 |
d_fetchul(&ptr, &mdb->drXTFlSize); |
| 368 |
|
| 369 |
for (i = 0; i < 3; ++i) |
| 370 |
{ |
| 371 |
d_fetchuw(&ptr, &mdb->drXTExtRec[i].xdrStABN); |
| 372 |
d_fetchuw(&ptr, &mdb->drXTExtRec[i].xdrNumABlks); |
| 373 |
} |
| 374 |
|
| 375 |
ASSERT(ptr - b == 146); |
| 376 |
|
| 377 |
d_fetchul(&ptr, &mdb->drCTFlSize); |
| 378 |
|
| 379 |
for (i = 0; i < 3; ++i) |
| 380 |
{ |
| 381 |
d_fetchuw(&ptr, &mdb->drCTExtRec[i].xdrStABN); |
| 382 |
d_fetchuw(&ptr, &mdb->drCTExtRec[i].xdrNumABlks); |
| 383 |
} |
| 384 |
|
| 385 |
ASSERT(ptr - b == 162); |
| 386 |
|
| 387 |
return 0; |
| 388 |
|
| 389 |
fail: |
| 390 |
return -1; |
| 391 |
} |
| 392 |
|
| 393 |
/* |
| 394 |
* NAME: low->putmdb() |
| 395 |
* DESCRIPTION: write master directory block(s) |
| 396 |
*/ |
| 397 |
int l_putmdb(hfsvol *vol, const MDB *mdb, int backup) |
| 398 |
{ |
| 399 |
block b; |
| 400 |
byte *ptr = b; |
| 401 |
int i; |
| 402 |
|
| 403 |
d_storesw(&ptr, mdb->drSigWord); |
| 404 |
d_storesl(&ptr, mdb->drCrDate); |
| 405 |
d_storesl(&ptr, mdb->drLsMod); |
| 406 |
d_storesw(&ptr, mdb->drAtrb); |
| 407 |
d_storeuw(&ptr, mdb->drNmFls); |
| 408 |
d_storeuw(&ptr, mdb->drVBMSt); |
| 409 |
d_storeuw(&ptr, mdb->drAllocPtr); |
| 410 |
d_storeuw(&ptr, mdb->drNmAlBlks); |
| 411 |
d_storeul(&ptr, mdb->drAlBlkSiz); |
| 412 |
d_storeul(&ptr, mdb->drClpSiz); |
| 413 |
d_storeuw(&ptr, mdb->drAlBlSt); |
| 414 |
d_storesl(&ptr, mdb->drNxtCNID); |
| 415 |
d_storeuw(&ptr, mdb->drFreeBks); |
| 416 |
|
| 417 |
d_storestr(&ptr, mdb->drVN, sizeof(mdb->drVN)); |
| 418 |
|
| 419 |
ASSERT(ptr - b == 64); |
| 420 |
|
| 421 |
d_storesl(&ptr, mdb->drVolBkUp); |
| 422 |
d_storesw(&ptr, mdb->drVSeqNum); |
| 423 |
d_storeul(&ptr, mdb->drWrCnt); |
| 424 |
d_storeul(&ptr, mdb->drXTClpSiz); |
| 425 |
d_storeul(&ptr, mdb->drCTClpSiz); |
| 426 |
d_storeuw(&ptr, mdb->drNmRtDirs); |
| 427 |
d_storeul(&ptr, mdb->drFilCnt); |
| 428 |
d_storeul(&ptr, mdb->drDirCnt); |
| 429 |
|
| 430 |
for (i = 0; i < 8; ++i) |
| 431 |
d_storesl(&ptr, mdb->drFndrInfo[i]); |
| 432 |
|
| 433 |
ASSERT(ptr - b == 124); |
| 434 |
|
| 435 |
d_storeuw(&ptr, mdb->drEmbedSigWord); |
| 436 |
d_storeuw(&ptr, mdb->drEmbedExtent.xdrStABN); |
| 437 |
d_storeuw(&ptr, mdb->drEmbedExtent.xdrNumABlks); |
| 438 |
|
| 439 |
d_storeul(&ptr, mdb->drXTFlSize); |
| 440 |
|
| 441 |
for (i = 0; i < 3; ++i) |
| 442 |
{ |
| 443 |
d_storeuw(&ptr, mdb->drXTExtRec[i].xdrStABN); |
| 444 |
d_storeuw(&ptr, mdb->drXTExtRec[i].xdrNumABlks); |
| 445 |
} |
| 446 |
|
| 447 |
ASSERT(ptr - b == 146); |
| 448 |
|
| 449 |
d_storeul(&ptr, mdb->drCTFlSize); |
| 450 |
|
| 451 |
for (i = 0; i < 3; ++i) |
| 452 |
{ |
| 453 |
d_storeuw(&ptr, mdb->drCTExtRec[i].xdrStABN); |
| 454 |
d_storeuw(&ptr, mdb->drCTExtRec[i].xdrNumABlks); |
| 455 |
} |
| 456 |
|
| 457 |
ASSERT(ptr - b == 162); |
| 458 |
|
| 459 |
memset(ptr, 0, HFS_BLOCKSZ - (ptr - b)); |
| 460 |
|
| 461 |
if (b_writelb(vol, 2, &b) == -1 || |
| 462 |
(backup && b_writelb(vol, vol->vlen - 2, &b) == -1)) |
| 463 |
goto fail; |
| 464 |
|
| 465 |
return 0; |
| 466 |
|
| 467 |
fail: |
| 468 |
return -1; |
| 469 |
} |
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