The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2007 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <objmng/drm_file.h> |
| 18 | |
| 19 | #include <unistd.h> |
| 20 | #include <sys/param.h> |
| 21 | #include <sys/stat.h> |
| 22 | #include <stdio.h> |
| 23 | #include <fcntl.h> |
| 24 | #include <dirent.h> |
| 25 | #include <errno.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | /** |
| 29 | * Fails on zaurus? |
| 30 | #define DEVICE_FILESYSTEM |
| 31 | */ |
| 32 | #define DEFAULT_TOTAL_SPACE (4L * 1024L * 1024L) /* 4 Meg. */ |
| 33 | |
| 34 | #ifndef DEVICE_FILESYSTEM |
| 35 | /* Store the total space on FS VM can use. */ |
| 36 | static int32_t totalSpace; |
| 37 | /* how many remain space can VM use. */ |
| 38 | static int32_t availableSize; |
| 39 | #endif |
| 40 | |
| 41 | extern char* getStorageRoot(void); |
| 42 | |
| 43 | static char tmpPathBuf1[MAX_FILENAME_LEN]; |
| 44 | static char tmpPathBuf2[MAX_FILENAME_LEN]; |
| 45 | |
| 46 | static int32_t |
| 47 | convertFilename(const uint16_t *strData, int32_t strLength, char *buffer); |
| 48 | |
| 49 | static int calcDirSize(char *path, int len, uint8_t includeSubdirs); |
| 50 | |
| 51 | #ifndef DEVICE_FILESYSTEM |
| 52 | static void initFsVariables(void); |
| 53 | #endif |
| 54 | |
| 55 | /** |
| 56 | * Convert a Java string into a nul terminated ascii string to pass to posix |
| 57 | * @param strData first character of name |
| 58 | * @param strLength number of characters in name |
| 59 | * @param buffer Buffer to store terminated string in (at least MAXPATHLEN) |
| 60 | * @return Length of filename in characters (excl. nul), or -1 on failure. |
| 61 | */ |
| 62 | static int32_t |
| 63 | convertFilename(const uint16_t *strData, int32_t strLength, char *buffer) |
| 64 | { |
| 65 | int idx; |
| 66 | |
| 67 | if (strLength >= (MAXPATHLEN-1)) |
| 68 | { |
| 69 | Trace("convertFilename '%.*S' too long", strLength, strData); |
| 70 | return -1; |
| 71 | } |
| 72 | |
| 73 | for (idx = 0; idx < strLength; ++idx) |
| 74 | *buffer++ = (char)*strData++; |
| 75 | |
| 76 | *buffer = 0; |
| 77 | return strLength; |
| 78 | } |
| 79 | |
| 80 | |
| 81 | /** |
| 82 | * Perform a stat() call on the given filename. |
| 83 | * Helper for getFileLength and exists |
| 84 | * @param name unicode name |
| 85 | * @param nameLen number of unicode characters in name |
| 86 | * @param sbuf stat buffer |
| 87 | * @return TRUE on success, FALSE on failure |
| 88 | */ |
| 89 | static int32_t |
| 90 | getFileStat(const uint16_t *name, int32_t nameLen, struct stat *sbuf) |
| 91 | { |
| 92 | Trace("getFileStat: %.*S", nameLen, name); |
| 93 | |
| 94 | if (convertFilename(name, nameLen, tmpPathBuf1) <= 0) |
| 95 | { |
| 96 | Trace("getFileStat: bad filename"); |
| 97 | } |
| 98 | else if (stat(tmpPathBuf1, sbuf) != 0) |
| 99 | { |
| 100 | Trace("getFileStat %s: stat() errno=%d", tmpPathBuf1, errno); |
| 101 | } |
| 102 | else /* Successful */ |
| 103 | { |
| 104 | return TRUE; |
| 105 | } |
| 106 | |
| 107 | return FALSE; |
| 108 | } |
| 109 | |
| 110 | #ifndef DEVICE_FILESYSTEM |
| 111 | /** |
| 112 | * initial the variables like totalSpace, availableSize... |
| 113 | */ |
| 114 | static void initFsVariables(void) |
| 115 | { |
| 116 | totalSpace = DEFAULT_TOTAL_SPACE; |
| 117 | |
| 118 | availableSize = totalSpace; |
| 119 | } |
| 120 | #endif /* DEVICE_FILESYSTEM */ |
| 121 | |
| 122 | /** |
| 123 | * calculate the size of everything inside path pointed directory |
| 124 | * this function will use path pointed buffer to store some extra info |
| 125 | * so param len is needed. |
| 126 | * @param path the directory path need to calculate |
| 127 | * @param len length of the path buffer, not the path string length |
| 128 | * @param includeSubdirs also calculate all the subdirs in path holds? |
| 129 | * @return the calculated size, DRM_FILE_FAILURE on failure. |
| 130 | */ |
| 131 | static int calcDirSize(char *path, int len, uint8_t includeSubdirs) |
| 132 | { |
| 133 | struct dirent *ent; |
| 134 | struct stat stat_buf; |
| 135 | |
| 136 | DIR *dir = NULL; |
| 137 | int size = 0; |
| 138 | int exists = -1; |
| 139 | int dirPathLen = strlen(path); |
| 140 | |
| 141 | /* Ensure space for wildcard */ |
| 142 | if((dirPathLen + 2) >= MAXPATHLEN || (dirPathLen + 2) >= len) |
| 143 | { |
| 144 | return DRM_FILE_FAILURE; |
| 145 | } |
| 146 | |
| 147 | if(path[dirPathLen - 1] != '/') |
| 148 | { |
| 149 | path[dirPathLen++] = '/'; |
| 150 | path[dirPathLen] = '\0'; |
| 151 | } |
| 152 | |
| 153 | dir = opendir(path); |
| 154 | if (dir == NULL) |
| 155 | { |
| 156 | return DRM_FILE_FAILURE; |
| 157 | } |
| 158 | |
| 159 | while ((ent = readdir(dir)) != NULL ) |
| 160 | { |
| 161 | if (strcmp(ent->d_name, ".") == 0 || |
| 162 | strcmp(ent->d_name, "..") == 0) |
| 163 | { |
| 164 | continue; |
| 165 | } |
| 166 | |
| 167 | path[dirPathLen] = '\0'; |
| 168 | if ((int)(strlen(ent->d_name) + dirPathLen + 1) < len) |
| 169 | { |
| 170 | strcat(path, ent->d_name); |
| 171 | } |
| 172 | else |
| 173 | { |
| 174 | continue; |
| 175 | } |
| 176 | |
| 177 | exists = stat(path, &stat_buf); |
| 178 | if (exists != -1) |
| 179 | { |
| 180 | /* exclude the storage occupied by directory itself */ |
| 181 | if (stat_buf.st_mode & S_IFDIR) |
| 182 | { |
| 183 | if(includeSubdirs) |
| 184 | { |
| 185 | /* calculate the size recursively */ |
| 186 | int ret; |
| 187 | ret = calcDirSize(path, len, includeSubdirs); |
| 188 | /* ignore failure in subdirs */ |
| 189 | if( DRM_FILE_FAILURE != ret ) |
| 190 | { |
| 191 | size += ret; |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | else |
| 196 | { |
| 197 | size += stat_buf.st_size; |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | closedir(dir); |
| 203 | return size; |
| 204 | } |
| 205 | |
| 206 | /* see drm_file.h */ |
| 207 | int32_t DRM_file_startup(void) |
| 208 | { |
| 209 | Trace("DRM_file_startup"); |
| 210 | |
| 211 | #ifndef DEVICE_FILESYSTEM |
| 212 | availableSize = -1; |
| 213 | |
| 214 | initFsVariables(); |
| 215 | #endif |
| 216 | |
| 217 | return DRM_FILE_SUCCESS; /* Nothing to do */ |
| 218 | } |
| 219 | |
| 220 | /* see drm_file.h */ |
| 221 | int32_t |
| 222 | DRM_file_listOpen(const uint16_t *prefix, |
| 223 | int32_t prefixLen, |
| 224 | int32_t* session, |
| 225 | int32_t* iteration) |
| 226 | { |
| 227 | Trace("DRM_file_listOpen: %.*S", prefixLen, prefix); |
| 228 | |
| 229 | if (convertFilename(prefix, prefixLen, tmpPathBuf1) <= 0) |
| 230 | { |
| 231 | Trace("DRM_file_listOpen: bad filename"); |
| 232 | } |
| 233 | else |
| 234 | { |
| 235 | DIR *dir; |
| 236 | |
| 237 | /* find the last /, and store the offset to the leaf prefix in |
| 238 | * *iteration |
| 239 | */ |
| 240 | |
| 241 | char *sep = strrchr(tmpPathBuf1, '/'); |
| 242 | /* Root "/" is a leaf */ |
| 243 | if (sep == NULL || ((sep != NULL) && (sep == tmpPathBuf1))) |
| 244 | { |
| 245 | *iteration = prefixLen; |
| 246 | |
| 247 | #ifdef TRACE_ON |
| 248 | sep = " <empty>"; /* trace will show sep+1 */ |
| 249 | #endif |
| 250 | } |
| 251 | else |
| 252 | { |
| 253 | *iteration = sep - tmpPathBuf1 + 1; |
| 254 | *sep = 0; |
| 255 | } |
| 256 | |
| 257 | dir = opendir(tmpPathBuf1); |
| 258 | |
| 259 | if (dir == NULL) |
| 260 | { |
| 261 | Trace("DRM_file_listOpen: opendir %s: errno=%d", tmpPathBuf1, errno); |
| 262 | } |
| 263 | else |
| 264 | { |
| 265 | Trace("DRM_file_listOpen: dir %s, filter %s", tmpPathBuf1, sep+1); |
| 266 | *session = (int32_t)dir; |
| 267 | return DRM_FILE_SUCCESS; |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | return DRM_FILE_FAILURE; |
| 272 | } |
| 273 | |
| 274 | /* see drm_file.h */ |
| 275 | int32_t |
| 276 | DRM_file_listNextEntry(const uint16_t *prefix, int32_t prefixLen, |
| 277 | uint16_t* entry, int32_t entrySize, |
| 278 | int32_t *session, int32_t* iteration) |
| 279 | { |
| 280 | struct dirent *ent; |
| 281 | |
| 282 | /* We stored the offset of the leaf part of the prefix (if any) |
| 283 | * in *iteration |
| 284 | */ |
| 285 | const uint16_t* strData = prefix + *iteration; |
| 286 | int32_t strLength = prefixLen - *iteration; |
| 287 | |
| 288 | /* entrySize is bytes for some reason. Convert to ucs chars */ |
| 289 | entrySize /= 2; |
| 290 | |
| 291 | /* Now we want to filter for files which start with the (possibly empty) |
| 292 | * sequence at strData. We have to return fully-qualified filenames, |
| 293 | * which means *iteration characters from prefix, plus the |
| 294 | * leaf name. |
| 295 | */ |
| 296 | |
| 297 | while ( (ent = readdir((DIR *)*session)) != NULL) |
| 298 | { |
| 299 | int len = strlen(ent->d_name); |
| 300 | |
| 301 | if ( (len + *iteration) > entrySize) |
| 302 | { |
| 303 | Trace("DRM_file_listNextEntry: %s too long", ent->d_name); |
| 304 | } |
| 305 | else if (strcmp(ent->d_name, ".") != 0 && |
| 306 | strcmp(ent->d_name, "..") != 0) |
| 307 | { |
| 308 | int idx; |
| 309 | struct stat sinfo; |
| 310 | |
| 311 | /* check against the filter */ |
| 312 | |
| 313 | for (idx = 0; idx < strLength; ++idx) |
| 314 | { |
| 315 | if (ent->d_name[idx] != strData[idx]) |
| 316 | goto next_name; |
| 317 | } |
| 318 | |
| 319 | Trace("DRM_file_listNextEntry: matched %s", ent->d_name); |
| 320 | |
| 321 | /* Now generate the fully-qualified name */ |
| 322 | |
| 323 | for (idx = 0; idx < *iteration; ++idx) |
| 324 | entry[idx] = prefix[idx]; |
| 325 | |
| 326 | for (idx = 0; idx < len; ++idx) |
| 327 | entry[*iteration + idx] = (unsigned char)ent->d_name[idx]; |
| 328 | |
| 329 | /*add "/" at the end of a DIR file entry*/ |
| 330 | if (getFileStat(entry, idx + *iteration, &sinfo)){ |
| 331 | if (S_ISDIR(sinfo.st_mode) && |
| 332 | (idx + 1 + *iteration) < entrySize) { |
| 333 | entry[*iteration + idx] = '/'; |
| 334 | ++idx; |
| 335 | } |
| 336 | } |
| 337 | else |
| 338 | { |
| 339 | Trace("DRM_file_listNextEntry: stat FAILURE on %.*S", |
| 340 | idx + *iteration, entry); |
| 341 | } |
| 342 | Trace("DRM_file_listNextEntry: got %.*S", idx + *iteration, entry); |
| 343 | |
| 344 | return idx + *iteration; |
| 345 | } |
| 346 | |
| 347 | next_name: |
| 348 | Trace("DRM_file_listNextEntry: rejected %s", ent->d_name); |
| 349 | } |
| 350 | |
| 351 | Trace("DRM_file_listNextEntry: end of list"); |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | /* see drm_file.h */ |
| 356 | int32_t |
| 357 | DRM_file_listClose(int32_t session, int32_t iteration) |
| 358 | { |
| 359 | closedir( (DIR *)session); |
| 360 | return DRM_FILE_SUCCESS; |
| 361 | } |
| 362 | |
| 363 | /* see drm_file.h */ |
| 364 | int32_t |
| 365 | DRM_file_getFileLength(const uint16_t *name, int32_t nameLen) |
| 366 | { |
| 367 | struct stat sbuf; |
| 368 | |
| 369 | if (getFileStat(name, nameLen, &sbuf)) |
| 370 | { |
| 371 | if (sbuf.st_size >= INT32_MAX) |
| 372 | { |
| 373 | Trace("DRM_file_getFileLength: file too big"); |
| 374 | } |
| 375 | else /* Successful */ |
| 376 | { |
| 377 | Trace("DRM_file_getFileLength: %.*S -> %d", |
| 378 | nameLen, name, (int32_t)sbuf.st_size); |
| 379 | return (int32_t)sbuf.st_size; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | return DRM_FILE_FAILURE; |
| 384 | } |
| 385 | |
| 386 | /* see drm_file.h */ |
| 387 | int32_t |
| 388 | DRM_file_delete(const uint16_t *name, int32_t nameLen) |
| 389 | { |
| 390 | Trace("DRM_file_delete: %.*S", nameLen, name); |
| 391 | |
| 392 | if (convertFilename(name, nameLen, tmpPathBuf1) <= 0) |
| 393 | { |
| 394 | Trace("DRM_file_delete: bad filename"); |
| 395 | return DRM_FILE_FAILURE; |
| 396 | } |
| 397 | else |
| 398 | { |
| 399 | struct stat sinfo; |
| 400 | if (stat(tmpPathBuf1, &sinfo) != 0){ |
| 401 | Trace("DRM_file_delete: stat failed, errno=%d", errno); |
| 402 | return DRM_FILE_FAILURE; |
| 403 | } |
| 404 | #ifndef DEVICE_FILESYSTEM |
| 405 | if (S_ISDIR(sinfo.st_mode)){ |
| 406 | /* it's a dir */ |
| 407 | if (rmdir(tmpPathBuf1) != 0){ |
| 408 | Trace("DRM_file_delete: dir remove failed, errno=%d", errno); |
| 409 | return DRM_FILE_FAILURE; |
| 410 | } |
| 411 | else |
| 412 | { |
| 413 | return DRM_FILE_SUCCESS; |
| 414 | } |
| 415 | } |
| 416 | #endif |
| 417 | /* it's a file */ |
| 418 | if (unlink(tmpPathBuf1) != 0) |
| 419 | { |
| 420 | Trace("DRM_file_delete: file remove failed, errno=%d", errno); |
| 421 | return DRM_FILE_FAILURE; |
| 422 | } |
| 423 | else |
| 424 | { |
| 425 | #ifndef DEVICE_FILESYSTEM |
| 426 | availableSize += sinfo.st_size; |
| 427 | #endif |
| 428 | return DRM_FILE_SUCCESS; |
| 429 | } |
| 430 | } |
| 431 | return DRM_FILE_FAILURE; |
| 432 | } |
| 433 | |
| 434 | /* see drm_file.h */ |
| 435 | int32_t |
| 436 | DRM_file_rename(const uint16_t *oldName, int32_t oldNameLen, |
| 437 | const uint16_t *newName, int32_t newNameLen) |
| 438 | { |
| 439 | Trace("DRM_file_rename %.*S -> %.*S", |
| 440 | oldNameLen, oldName, newNameLen, newName); |
| 441 | if (DRM_file_exists(newName, newNameLen) != DRM_FILE_FAILURE) |
| 442 | { |
| 443 | Trace("DRM_file_rename: filename:%s exist",newName); |
| 444 | return DRM_FILE_FAILURE; |
| 445 | } |
| 446 | |
| 447 | if (convertFilename(oldName, oldNameLen, tmpPathBuf1) <= 0 || |
| 448 | convertFilename(newName, newNameLen, tmpPathBuf2) <= 0) |
| 449 | { |
| 450 | Trace("DRM_file_rename: bad filename"); |
| 451 | } |
| 452 | else if (rename(tmpPathBuf1, tmpPathBuf2) != 0) |
| 453 | { |
| 454 | Trace("DRM_file_rename: failed errno=%d", errno); |
| 455 | } |
| 456 | else /* Success */ |
| 457 | { |
| 458 | return DRM_FILE_SUCCESS; |
| 459 | } |
| 460 | |
| 461 | return DRM_FILE_FAILURE; |
| 462 | } |
| 463 | |
| 464 | /* see drm_file.h */ |
| 465 | int32_t |
| 466 | DRM_file_exists(const uint16_t *name, int32_t nameLen) |
| 467 | { |
| 468 | struct stat sbuf; |
| 469 | |
| 470 | Trace("DRM_file_exists: %.*S", nameLen, name); |
| 471 | |
| 472 | /*remove trailing "/" separators, except the first "/" standing for root*/ |
| 473 | while ((nameLen > 1) && (name[nameLen -1] == '/')) |
| 474 | --nameLen; |
| 475 | |
| 476 | if (getFileStat(name, nameLen, &sbuf)) |
| 477 | { |
| 478 | Trace("DRM_file_exists: stat returns mode 0x%x", sbuf.st_mode); |
| 479 | |
| 480 | if (S_ISDIR(sbuf.st_mode)) |
| 481 | return DRM_FILE_ISDIR; |
| 482 | if (S_ISREG(sbuf.st_mode)) |
| 483 | return DRM_FILE_ISREG; |
| 484 | } |
| 485 | |
| 486 | return DRM_FILE_FAILURE; |
| 487 | } |
| 488 | |
| 489 | /* see drm_file.h */ |
| 490 | int32_t |
| 491 | DRM_file_open(const uint16_t *name, int32_t nameLen, int32_t mode, |
| 492 | int32_t* handle) |
| 493 | { |
| 494 | int res; |
| 495 | |
| 496 | #if DRM_FILE_MODE_READ != 1 || DRM_FILE_MODE_WRITE != 2 |
| 497 | #error constants changed |
| 498 | #endif |
| 499 | |
| 500 | /* Convert DRM file modes to posix modes */ |
| 501 | static const int modes[4] = |
| 502 | { 0, |
| 503 | O_RDONLY, |
| 504 | O_WRONLY | O_CREAT, |
| 505 | O_RDWR | O_CREAT |
| 506 | }; |
| 507 | |
| 508 | Trace("DRM_file_open %.*S mode 0x%x", nameLen, name, mode); |
| 509 | |
| 510 | assert((mode & ~(DRM_FILE_MODE_READ|DRM_FILE_MODE_WRITE)) == 0); |
| 511 | |
| 512 | if (convertFilename(name, nameLen, tmpPathBuf1) <= 0) |
| 513 | { |
| 514 | Trace("DRM_file_open: bad filename"); |
| 515 | return DRM_FILE_FAILURE; |
| 516 | } |
| 517 | |
| 518 | if ((res = open(tmpPathBuf1, modes[mode], 0777)) == -1) |
| 519 | { |
| 520 | Trace("DRM_file_open: open failed errno=%d", errno); |
| 521 | return DRM_FILE_FAILURE; |
| 522 | } |
| 523 | |
| 524 | Trace("DRM_file_open: open '%s; returned %d", tmpPathBuf1, res); |
| 525 | *handle = res; |
| 526 | |
| 527 | return DRM_FILE_SUCCESS; |
| 528 | } |
| 529 | |
| 530 | /* see drm_file.h */ |
| 531 | int32_t |
| 532 | DRM_file_read(int32_t handle, uint8_t* dst, int32_t length) |
| 533 | { |
| 534 | int n; |
| 535 | |
| 536 | assert(length > 0); |
| 537 | |
| 538 | /* TODO: Make dst a void *? */ |
| 539 | |
| 540 | n = read((int)handle, dst, (size_t)length); |
| 541 | if (n > 0) |
| 542 | { |
| 543 | Trace("DRM_file_read handle=%d read %d bytes", handle, n); |
| 544 | return n; |
| 545 | } |
| 546 | else if (n == 0) |
| 547 | { |
| 548 | Trace("DRM_file_read read EOF: handle=%d", handle); |
| 549 | return DRM_FILE_EOF; |
| 550 | } |
| 551 | else |
| 552 | { |
| 553 | Trace("DRM_file_read failed handle=%d, errno=%d", handle, errno); |
| 554 | return DRM_FILE_FAILURE; |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /* see drm_file.h */ |
| 559 | int32_t |
| 560 | DRM_file_write(int32_t handle, const uint8_t* src, int32_t length) |
| 561 | { |
| 562 | /* TODO: Make dst a void *? */ |
| 563 | int n; |
| 564 | #ifndef DEVICE_FILESYSTEM |
| 565 | int delta; |
| 566 | off_t prevPos; |
| 567 | struct stat sbuf; |
| 568 | int prevFileSize; |
| 569 | #endif |
| 570 | |
| 571 | assert(length >= 0); |
| 572 | |
| 573 | #ifndef DEVICE_FILESYSTEM |
| 574 | if ( -1 == fstat((int)handle, &sbuf) ) |
| 575 | { |
| 576 | Trace("DRM_file_write: fstat error %d", errno); |
| 577 | return DRM_FILE_FAILURE; |
| 578 | } |
| 579 | prevFileSize = (int)(sbuf.st_size); |
| 580 | prevPos = lseek( (int)handle, 0, SEEK_CUR); |
| 581 | if ( (off_t)-1 == prevPos ) |
| 582 | { |
| 583 | Trace("DRM_file_write: get current pos error %d", errno); |
| 584 | return DRM_FILE_FAILURE; |
| 585 | } |
| 586 | delta = (int)prevPos + length - prevFileSize; |
| 587 | if (delta > availableSize) |
| 588 | { |
| 589 | Trace("DRM_file_write: not enough size!"); |
| 590 | return DRM_FILE_FAILURE; |
| 591 | } |
| 592 | #endif |
| 593 | n = write((int)handle, src, (size_t)length); |
| 594 | if (n < 0) |
| 595 | { |
| 596 | Trace("DRM_file_write failed errno=%d", errno); |
| 597 | return DRM_FILE_FAILURE; |
| 598 | } |
| 599 | #ifndef DEVICE_FILESYSTEM |
| 600 | delta = prevPos + n - prevFileSize; |
| 601 | |
| 602 | if ( delta > 0 ) |
| 603 | { |
| 604 | availableSize -= delta; |
| 605 | } |
| 606 | #endif |
| 607 | Trace("DRM_file_write handle=%d wrote %d/%d bytes", handle, n, length); |
| 608 | |
| 609 | return n; |
| 610 | } |
| 611 | |
| 612 | /* see drm_file.h */ |
| 613 | int32_t DRM_file_close(int32_t handle) |
| 614 | { |
| 615 | if (close((int)handle) == 0) |
| 616 | { |
| 617 | Trace("DRM_file_close handle=%d success", handle); |
| 618 | return DRM_FILE_SUCCESS; |
| 619 | } |
| 620 | |
| 621 | Trace("DRM_file_close handle=%d failed", handle); |
| 622 | return DRM_FILE_FAILURE; |
| 623 | } |
| 624 | |
| 625 | /* see drm_file.h */ |
| 626 | int32_t |
| 627 | DRM_file_setPosition(int32_t handle, int32_t value) |
| 628 | { |
| 629 | #ifndef DEVICE_FILESYSTEM |
| 630 | struct stat sbuf; |
| 631 | #endif |
| 632 | off_t newPos; |
| 633 | |
| 634 | if (value < 0) |
| 635 | { |
| 636 | Trace("DRM_file_setPosition: handle=%d negative value (%d)", |
| 637 | handle, value); |
| 638 | return DRM_FILE_FAILURE; |
| 639 | } |
| 640 | |
| 641 | #ifndef DEVICE_FILESYSTEM |
| 642 | if ( fstat((int)handle, &sbuf) == -1 ) |
| 643 | { |
| 644 | Trace("DRM_file_setPosition: fstat fail errno=%d", errno); |
| 645 | return DRM_FILE_FAILURE; |
| 646 | } |
| 647 | |
| 648 | if ( ((off_t)value > sbuf.st_size) && |
| 649 | (availableSize < (value - (int)(sbuf.st_size))) ) |
| 650 | { |
| 651 | Trace("DRM_file_setPosition: not enough space"); |
| 652 | return DRM_FILE_FAILURE; |
| 653 | } |
| 654 | #endif |
| 655 | |
| 656 | newPos = lseek( (int)handle, (off_t)value, SEEK_SET); |
| 657 | if ( newPos == (off_t)-1 ) |
| 658 | { |
| 659 | Trace("DRM_file_setPosition: seek failed: errno=%d", errno); |
| 660 | } |
| 661 | else |
| 662 | { |
| 663 | #ifndef DEVICE_FILESYSTEM |
| 664 | if ( newPos > sbuf.st_size ) |
| 665 | { |
| 666 | availableSize -= (int)(newPos - sbuf.st_size); |
| 667 | } |
| 668 | #endif |
| 669 | return DRM_FILE_SUCCESS; |
| 670 | } |
| 671 | |
| 672 | return DRM_FILE_FAILURE; |
| 673 | } |
| 674 | |
| 675 | /* see drm_file.h */ |
| 676 | int32_t |
| 677 | DRM_file_mkdir(const uint16_t* name, int32_t nameChars) |
| 678 | { |
| 679 | Trace("DRM_file_mkdir started!.."); |
| 680 | |
| 681 | if (convertFilename(name, nameChars, tmpPathBuf1) <= 0) |
| 682 | { |
| 683 | Trace("DRM_file_mkdir: bad filename"); |
| 684 | return DRM_FILE_FAILURE; |
| 685 | } |
| 686 | |
| 687 | if (mkdir(tmpPathBuf1,0777) != 0) |
| 688 | { |
| 689 | Trace("DRM_file_mkdir failed!errno=%d",errno); |
| 690 | return DRM_FILE_FAILURE; |
| 691 | } |
| 692 | |
| 693 | return DRM_FILE_SUCCESS; |
| 694 | } |