| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (archive_file.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | |
| 27 | #include <compat/strl.h> |
| 28 | #include <file/archive_file.h> |
| 29 | #include <file/file_path.h> |
| 30 | #include <streams/file_stream.h> |
| 31 | #include <retro_miscellaneous.h> |
| 32 | #include <lists/string_list.h> |
| 33 | #include <string/stdstring.h> |
| 34 | |
| 35 | #ifdef HAVE_MMAP |
| 36 | #include <fcntl.h> |
| 37 | #include <errno.h> |
| 38 | #include <unistd.h> |
| 39 | #include <sys/mman.h> |
| 40 | #include <sys/stat.h> |
| 41 | #endif |
| 42 | |
| 43 | static int file_archive_get_file_list_cb( |
| 44 | const char *path, |
| 45 | const char *valid_exts, |
| 46 | const uint8_t *cdata, |
| 47 | unsigned cmode, |
| 48 | uint32_t csize, |
| 49 | uint32_t size, |
| 50 | uint32_t checksum, |
| 51 | struct archive_extract_userdata *userdata) |
| 52 | { |
| 53 | union string_list_elem_attr attr; |
| 54 | attr.i = 0; |
| 55 | |
| 56 | if (valid_exts) |
| 57 | { |
| 58 | size_t path_len = strlen(path); |
| 59 | /* Checks if this entry is a directory or a file. */ |
| 60 | char last_char = path[path_len - 1]; |
| 61 | struct string_list ext_list = {0}; |
| 62 | |
| 63 | /* Skip if directory. */ |
| 64 | if (last_char == '/' || last_char == '\\' ) |
| 65 | return 1; |
| 66 | |
| 67 | string_list_initialize(&ext_list); |
| 68 | if (string_split_noalloc(&ext_list, valid_exts, "|")) |
| 69 | { |
| 70 | const char *file_ext = path_get_extension(path); |
| 71 | |
| 72 | if (!file_ext) |
| 73 | { |
| 74 | string_list_deinitialize(&ext_list); |
| 75 | return 1; |
| 76 | } |
| 77 | |
| 78 | if (!string_list_find_elem_prefix(&ext_list, ".", file_ext)) |
| 79 | { |
| 80 | /* keep iterating */ |
| 81 | string_list_deinitialize(&ext_list); |
| 82 | return -1; |
| 83 | } |
| 84 | |
| 85 | attr.i = RARCH_COMPRESSED_FILE_IN_ARCHIVE; |
| 86 | } |
| 87 | |
| 88 | string_list_deinitialize(&ext_list); |
| 89 | } |
| 90 | |
| 91 | return string_list_append(userdata->list, path, attr); |
| 92 | } |
| 93 | |
| 94 | static int file_archive_extract_cb(const char *name, const char *valid_exts, |
| 95 | const uint8_t *cdata, |
| 96 | unsigned cmode, uint32_t csize, uint32_t size, |
| 97 | uint32_t checksum, struct archive_extract_userdata *userdata) |
| 98 | { |
| 99 | const char *ext = path_get_extension(name); |
| 100 | |
| 101 | /* Extract first file that matches our list. */ |
| 102 | if (ext && string_list_find_elem(userdata->ext, ext)) |
| 103 | { |
| 104 | char new_path[PATH_MAX_LENGTH]; |
| 105 | const char *delim; |
| 106 | |
| 107 | if ((delim = path_get_archive_delim(userdata->archive_path))) |
| 108 | { |
| 109 | if (!string_is_equal_noncase( |
| 110 | userdata->current_file_path, delim + 1)) |
| 111 | return 1; /* keep searching for the right file */ |
| 112 | } |
| 113 | |
| 114 | if (userdata->extraction_directory) |
| 115 | fill_pathname_join_special(new_path, userdata->extraction_directory, |
| 116 | path_basename(name), sizeof(new_path)); |
| 117 | else |
| 118 | fill_pathname_resolve_relative(new_path, userdata->archive_path, |
| 119 | path_basename(name), sizeof(new_path)); |
| 120 | |
| 121 | if (file_archive_perform_mode(new_path, |
| 122 | valid_exts, cdata, cmode, csize, size, |
| 123 | checksum, userdata)) |
| 124 | { |
| 125 | userdata->found_file = true; |
| 126 | userdata->first_extracted_file_path = strdup(new_path); |
| 127 | } |
| 128 | |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | return 1; |
| 133 | } |
| 134 | |
| 135 | static int file_archive_parse_file_init(file_archive_transfer_t *state, |
| 136 | const char *file) |
| 137 | { |
| 138 | char path[PATH_MAX_LENGTH]; |
| 139 | char *last = NULL; |
| 140 | |
| 141 | strlcpy(path, file, sizeof(path)); |
| 142 | |
| 143 | if ((last = (char*)path_get_archive_delim(path))) |
| 144 | *last = '\0'; |
| 145 | |
| 146 | if (!(state->backend = file_archive_get_file_backend(path))) |
| 147 | return -1; |
| 148 | |
| 149 | /* Failed to open archive. */ |
| 150 | if (!(state->archive_file = filestream_open(path, |
| 151 | RETRO_VFS_FILE_ACCESS_READ, |
| 152 | RETRO_VFS_FILE_ACCESS_HINT_NONE))) |
| 153 | return -1; |
| 154 | |
| 155 | state->archive_size = filestream_get_size(state->archive_file); |
| 156 | |
| 157 | #ifdef HAVE_MMAP |
| 158 | if (state->archive_size <= (256*1024*1024)) |
| 159 | { |
| 160 | state->archive_mmap_fd = open(path, O_RDONLY); |
| 161 | if (state->archive_mmap_fd) |
| 162 | { |
| 163 | state->archive_mmap_data = (uint8_t*)mmap(NULL, (size_t)state->archive_size, |
| 164 | PROT_READ, MAP_SHARED, state->archive_mmap_fd, 0); |
| 165 | |
| 166 | if (state->archive_mmap_data == (uint8_t*)MAP_FAILED) |
| 167 | { |
| 168 | close(state->archive_mmap_fd); |
| 169 | state->archive_mmap_fd = 0; |
| 170 | state->archive_mmap_data = NULL; |
| 171 | } |
| 172 | } |
| 173 | } |
| 174 | #endif |
| 175 | |
| 176 | state->step_current = 0; |
| 177 | state->step_total = 0; |
| 178 | |
| 179 | return state->backend->archive_parse_file_init(state, path); |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * file_archive_decompress_data_to_file: |
| 184 | * @path : filename path of archive. |
| 185 | * @size : output file size |
| 186 | * @checksum : CRC32 checksum from input data. |
| 187 | * |
| 188 | * Write data to file. |
| 189 | * |
| 190 | * Returns: true (1) on success, otherwise false (0). |
| 191 | **/ |
| 192 | static int file_archive_decompress_data_to_file( |
| 193 | file_archive_transfer_t *transfer, |
| 194 | file_archive_file_handle_t *handle, |
| 195 | const char *path, |
| 196 | uint32_t size, |
| 197 | uint32_t checksum) |
| 198 | { |
| 199 | if (!handle) |
| 200 | return 0; |
| 201 | |
| 202 | #if 0 |
| 203 | handle->real_checksum = transfer->backend->stream_crc_calculate( |
| 204 | 0, handle->data, size); |
| 205 | if (handle->real_checksum != checksum) |
| 206 | { |
| 207 | /* File CRC difers from archive CRC. */ |
| 208 | printf("File CRC differs from archive CRC. File: 0x%x, Archive: 0x%x.\n", |
| 209 | (unsigned)handle->real_checksum, (unsigned)checksum); |
| 210 | } |
| 211 | #endif |
| 212 | |
| 213 | if (!filestream_write_file(path, handle->data, size)) |
| 214 | return 0; |
| 215 | |
| 216 | return 1; |
| 217 | } |
| 218 | |
| 219 | void file_archive_parse_file_iterate_stop(file_archive_transfer_t *state) |
| 220 | { |
| 221 | if (!state || !state->archive_file) |
| 222 | return; |
| 223 | |
| 224 | state->type = ARCHIVE_TRANSFER_DEINIT; |
| 225 | file_archive_parse_file_iterate(state, NULL, NULL, NULL, NULL, NULL); |
| 226 | } |
| 227 | |
| 228 | int file_archive_parse_file_iterate( |
| 229 | file_archive_transfer_t *state, |
| 230 | bool *returnerr, |
| 231 | const char *file, |
| 232 | const char *valid_exts, |
| 233 | file_archive_file_cb file_cb, |
| 234 | struct archive_extract_userdata *userdata) |
| 235 | { |
| 236 | if (!state) |
| 237 | return -1; |
| 238 | |
| 239 | switch (state->type) |
| 240 | { |
| 241 | case ARCHIVE_TRANSFER_NONE: |
| 242 | break; |
| 243 | case ARCHIVE_TRANSFER_INIT: |
| 244 | if (file_archive_parse_file_init(state, file) == 0) |
| 245 | { |
| 246 | if (userdata) |
| 247 | { |
| 248 | userdata->transfer = state; |
| 249 | strlcpy(userdata->archive_path, file, |
| 250 | sizeof(userdata->archive_path)); |
| 251 | } |
| 252 | state->type = ARCHIVE_TRANSFER_ITERATE; |
| 253 | } |
| 254 | else |
| 255 | state->type = ARCHIVE_TRANSFER_DEINIT_ERROR; |
| 256 | break; |
| 257 | case ARCHIVE_TRANSFER_ITERATE: |
| 258 | if (state->backend) |
| 259 | { |
| 260 | int ret = state->backend->archive_parse_file_iterate_step( |
| 261 | state->context, valid_exts, userdata, file_cb); |
| 262 | |
| 263 | if (ret == 1) |
| 264 | state->step_current++; /* found another file */ |
| 265 | if (ret != 1) |
| 266 | state->type = ARCHIVE_TRANSFER_DEINIT; |
| 267 | if (ret == -1) |
| 268 | state->type = ARCHIVE_TRANSFER_DEINIT_ERROR; |
| 269 | |
| 270 | /* early return to prevent deinit from never firing */ |
| 271 | return 0; |
| 272 | } |
| 273 | return -1; |
| 274 | case ARCHIVE_TRANSFER_DEINIT_ERROR: |
| 275 | *returnerr = false; |
| 276 | case ARCHIVE_TRANSFER_DEINIT: |
| 277 | if (state->context) |
| 278 | { |
| 279 | if (state->backend->archive_parse_file_free) |
| 280 | state->backend->archive_parse_file_free(state->context); |
| 281 | state->context = NULL; |
| 282 | } |
| 283 | |
| 284 | if (state->archive_file) |
| 285 | { |
| 286 | filestream_close(state->archive_file); |
| 287 | state->archive_file = NULL; |
| 288 | } |
| 289 | |
| 290 | #ifdef HAVE_MMAP |
| 291 | if (state->archive_mmap_data) |
| 292 | { |
| 293 | munmap(state->archive_mmap_data, (size_t)state->archive_size); |
| 294 | close(state->archive_mmap_fd); |
| 295 | state->archive_mmap_fd = 0; |
| 296 | state->archive_mmap_data = NULL; |
| 297 | } |
| 298 | #endif |
| 299 | |
| 300 | if (userdata) |
| 301 | userdata->transfer = NULL; |
| 302 | break; |
| 303 | } |
| 304 | |
| 305 | if ( state->type == ARCHIVE_TRANSFER_DEINIT || |
| 306 | state->type == ARCHIVE_TRANSFER_DEINIT_ERROR) |
| 307 | return -1; |
| 308 | |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | /** |
| 313 | * file_archive_walk: |
| 314 | * @file : filename path of archive |
| 315 | * @valid_exts : Valid extensions of archive to be parsed. |
| 316 | * If NULL, allow all. |
| 317 | * @file_cb : file_cb function pointer |
| 318 | * @userdata : userdata to pass to file_cb function pointer. |
| 319 | * |
| 320 | * Low-level file parsing. Enumerates over all files and calls |
| 321 | * file_cb with userdata. |
| 322 | * |
| 323 | * Returns: true (1) on success, otherwise false (0). |
| 324 | **/ |
| 325 | static bool file_archive_walk(const char *file, const char *valid_exts, |
| 326 | file_archive_file_cb file_cb, struct archive_extract_userdata *userdata) |
| 327 | { |
| 328 | file_archive_transfer_t state; |
| 329 | bool returnerr = true; |
| 330 | |
| 331 | state.type = ARCHIVE_TRANSFER_INIT; |
| 332 | state.archive_file = NULL; |
| 333 | #ifdef HAVE_MMAP |
| 334 | state.archive_mmap_fd = 0; |
| 335 | state.archive_mmap_data = NULL; |
| 336 | #endif |
| 337 | state.archive_size = 0; |
| 338 | state.context = NULL; |
| 339 | state.step_total = 0; |
| 340 | state.step_current = 0; |
| 341 | state.backend = NULL; |
| 342 | |
| 343 | for (;;) |
| 344 | { |
| 345 | if (file_archive_parse_file_iterate(&state, &returnerr, file, |
| 346 | valid_exts, file_cb, userdata) != 0) |
| 347 | break; |
| 348 | } |
| 349 | |
| 350 | return returnerr; |
| 351 | } |
| 352 | |
| 353 | int file_archive_parse_file_progress(file_archive_transfer_t *state) |
| 354 | { |
| 355 | if (!state || state->step_total == 0) |
| 356 | return 0; |
| 357 | |
| 358 | return (int)((state->step_current * 100) / (state->step_total)); |
| 359 | } |
| 360 | |
| 361 | /** |
| 362 | * file_archive_extract_file: |
| 363 | * @archive_path : filename path to archive. |
| 364 | * @valid_exts : valid extensions for the file. |
| 365 | * @extraction_directory : the directory to extract temporary |
| 366 | * file to. |
| 367 | * |
| 368 | * Extract file from archive. If no file inside the archive is |
| 369 | * specified, the first file found will be used. |
| 370 | * |
| 371 | * Returns : true (1) on success, otherwise false (0). |
| 372 | **/ |
| 373 | bool file_archive_extract_file( |
| 374 | const char *archive_path, |
| 375 | const char *valid_exts, |
| 376 | const char *extraction_directory, |
| 377 | char *out_path, size_t len) |
| 378 | { |
| 379 | struct archive_extract_userdata userdata; |
| 380 | bool ret = true; |
| 381 | struct string_list *list = string_split(valid_exts, "|"); |
| 382 | |
| 383 | userdata.archive_path[0] = '\0'; |
| 384 | userdata.current_file_path[0] = '\0'; |
| 385 | userdata.first_extracted_file_path = NULL; |
| 386 | userdata.extraction_directory = extraction_directory; |
| 387 | userdata.ext = list; |
| 388 | userdata.list = NULL; |
| 389 | userdata.found_file = false; |
| 390 | userdata.list_only = false; |
| 391 | userdata.crc = 0; |
| 392 | userdata.transfer = NULL; |
| 393 | userdata.dec = NULL; |
| 394 | |
| 395 | if (!list) |
| 396 | { |
| 397 | ret = false; |
| 398 | goto end; |
| 399 | } |
| 400 | |
| 401 | if (!file_archive_walk(archive_path, valid_exts, |
| 402 | file_archive_extract_cb, &userdata)) |
| 403 | { |
| 404 | /* Parsing file archive failed. */ |
| 405 | ret = false; |
| 406 | goto end; |
| 407 | } |
| 408 | |
| 409 | if (!userdata.found_file) |
| 410 | { |
| 411 | /* Didn't find any file that matched valid extensions |
| 412 | * for libretro implementation. */ |
| 413 | ret = false; |
| 414 | goto end; |
| 415 | } |
| 416 | |
| 417 | if (!string_is_empty(userdata.first_extracted_file_path)) |
| 418 | strlcpy(out_path, userdata.first_extracted_file_path, len); |
| 419 | |
| 420 | end: |
| 421 | if (userdata.first_extracted_file_path) |
| 422 | free(userdata.first_extracted_file_path); |
| 423 | if (list) |
| 424 | string_list_free(list); |
| 425 | return ret; |
| 426 | } |
| 427 | |
| 428 | /* Warning: 'list' must zero initialised before |
| 429 | * calling this function, otherwise memory leaks/ |
| 430 | * undefined behaviour will occur */ |
| 431 | bool file_archive_get_file_list_noalloc(struct string_list *list, |
| 432 | const char *path, |
| 433 | const char *valid_exts) |
| 434 | { |
| 435 | struct archive_extract_userdata userdata; |
| 436 | |
| 437 | if (!list || !string_list_initialize(list)) |
| 438 | return false; |
| 439 | |
| 440 | strlcpy(userdata.archive_path, path, sizeof(userdata.archive_path)); |
| 441 | userdata.current_file_path[0] = '\0'; |
| 442 | userdata.first_extracted_file_path = NULL; |
| 443 | userdata.extraction_directory = NULL; |
| 444 | userdata.ext = NULL; |
| 445 | userdata.list = list; |
| 446 | userdata.found_file = false; |
| 447 | userdata.list_only = true; |
| 448 | userdata.crc = 0; |
| 449 | userdata.transfer = NULL; |
| 450 | userdata.dec = NULL; |
| 451 | |
| 452 | if (!file_archive_walk(path, valid_exts, |
| 453 | file_archive_get_file_list_cb, &userdata)) |
| 454 | return false; |
| 455 | return true; |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * file_archive_get_file_list: |
| 460 | * @path : filename path of archive |
| 461 | * |
| 462 | * Returns: string listing of files from archive on success, otherwise NULL. |
| 463 | **/ |
| 464 | struct string_list *file_archive_get_file_list(const char *path, |
| 465 | const char *valid_exts) |
| 466 | { |
| 467 | struct archive_extract_userdata userdata; |
| 468 | |
| 469 | strlcpy(userdata.archive_path, path, sizeof(userdata.archive_path)); |
| 470 | userdata.current_file_path[0] = '\0'; |
| 471 | userdata.first_extracted_file_path = NULL; |
| 472 | userdata.extraction_directory = NULL; |
| 473 | userdata.ext = NULL; |
| 474 | userdata.list = string_list_new(); |
| 475 | userdata.found_file = false; |
| 476 | userdata.list_only = true; |
| 477 | userdata.crc = 0; |
| 478 | userdata.transfer = NULL; |
| 479 | userdata.dec = NULL; |
| 480 | |
| 481 | if (!userdata.list) |
| 482 | return NULL; |
| 483 | if (!file_archive_walk(path, valid_exts, |
| 484 | file_archive_get_file_list_cb, &userdata)) |
| 485 | { |
| 486 | string_list_free(userdata.list); |
| 487 | return NULL; |
| 488 | } |
| 489 | return userdata.list; |
| 490 | } |
| 491 | |
| 492 | bool file_archive_perform_mode(const char *path, const char *valid_exts, |
| 493 | const uint8_t *cdata, unsigned cmode, uint32_t csize, uint32_t size, |
| 494 | uint32_t crc32, struct archive_extract_userdata *userdata) |
| 495 | { |
| 496 | file_archive_file_handle_t handle; |
| 497 | int ret; |
| 498 | |
| 499 | if (!userdata->transfer || !userdata->transfer->backend) |
| 500 | return false; |
| 501 | |
| 502 | handle.data = NULL; |
| 503 | handle.real_checksum = 0; |
| 504 | |
| 505 | if (!userdata->transfer->backend->stream_decompress_data_to_file_init( |
| 506 | userdata->transfer->context, &handle, cdata, cmode, csize, size)) |
| 507 | return false; |
| 508 | |
| 509 | do |
| 510 | { |
| 511 | ret = userdata->transfer->backend->stream_decompress_data_to_file_iterate( |
| 512 | userdata->transfer->context, &handle); |
| 513 | }while (ret == 0); |
| 514 | |
| 515 | if (ret == -1 || !file_archive_decompress_data_to_file( |
| 516 | userdata->transfer, &handle, path, |
| 517 | size, crc32)) |
| 518 | return false; |
| 519 | |
| 520 | return true; |
| 521 | } |
| 522 | |
| 523 | /** |
| 524 | * file_archive_filename_split: |
| 525 | * @str : filename to turn into a string list |
| 526 | * |
| 527 | * Creates a new string list based on filename @path, delimited by a hash (#). |
| 528 | * |
| 529 | * Returns: new string list if successful, otherwise NULL. |
| 530 | */ |
| 531 | static struct string_list *file_archive_filename_split(const char *path) |
| 532 | { |
| 533 | union string_list_elem_attr attr; |
| 534 | struct string_list *list = string_list_new(); |
| 535 | const char *delim = path_get_archive_delim(path); |
| 536 | |
| 537 | attr.i = 0; |
| 538 | |
| 539 | if (delim) |
| 540 | { |
| 541 | /* add archive path to list first */ |
| 542 | if (!string_list_append_n(list, path, (unsigned)(delim - path), attr)) |
| 543 | goto error; |
| 544 | |
| 545 | /* now add the path within the archive */ |
| 546 | delim++; |
| 547 | |
| 548 | if (*delim) |
| 549 | { |
| 550 | if (!string_list_append(list, delim, attr)) |
| 551 | goto error; |
| 552 | } |
| 553 | } |
| 554 | else |
| 555 | if (!string_list_append(list, path, attr)) |
| 556 | goto error; |
| 557 | |
| 558 | return list; |
| 559 | |
| 560 | error: |
| 561 | string_list_free(list); |
| 562 | return NULL; |
| 563 | } |
| 564 | |
| 565 | /* Generic compressed file loader. |
| 566 | * Extracts to buf, unless optional_filename != 0 |
| 567 | * Then extracts to optional_filename and leaves buf alone. |
| 568 | */ |
| 569 | int file_archive_compressed_read( |
| 570 | const char * path, void **buf, |
| 571 | const char* optional_filename, int64_t *length) |
| 572 | { |
| 573 | const struct |
| 574 | file_archive_file_backend *backend = NULL; |
| 575 | struct string_list *str_list = NULL; |
| 576 | |
| 577 | /* Safety check. |
| 578 | * If optional_filename and optional_filename |
| 579 | * exists, we simply return 0, |
| 580 | * hoping that optional_filename is the |
| 581 | * same as requested. |
| 582 | */ |
| 583 | if (optional_filename && path_is_valid(optional_filename)) |
| 584 | { |
| 585 | *length = 0; |
| 586 | return 1; |
| 587 | } |
| 588 | |
| 589 | str_list = file_archive_filename_split(path); |
| 590 | /* We assure that there is something after the '#' symbol. |
| 591 | * |
| 592 | * This error condition happens for example, when |
| 593 | * path = /path/to/file.7z, or |
| 594 | * path = /path/to/file.7z# |
| 595 | */ |
| 596 | if (str_list->size <= 1) |
| 597 | { |
| 598 | /* could not extract string and substring. */ |
| 599 | string_list_free(str_list); |
| 600 | *length = 0; |
| 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | backend = file_archive_get_file_backend(str_list->elems[0].data); |
| 605 | *length = backend->compressed_file_read(str_list->elems[0].data, |
| 606 | str_list->elems[1].data, buf, optional_filename); |
| 607 | |
| 608 | string_list_free(str_list); |
| 609 | |
| 610 | if (*length != -1) |
| 611 | return 1; |
| 612 | |
| 613 | return 0; |
| 614 | } |
| 615 | |
| 616 | const struct file_archive_file_backend *file_archive_get_zlib_file_backend(void) |
| 617 | { |
| 618 | #ifdef HAVE_ZLIB |
| 619 | return &zlib_backend; |
| 620 | #else |
| 621 | return NULL; |
| 622 | #endif |
| 623 | } |
| 624 | |
| 625 | const struct file_archive_file_backend *file_archive_get_7z_file_backend(void) |
| 626 | { |
| 627 | #ifdef HAVE_7ZIP |
| 628 | return &sevenzip_backend; |
| 629 | #else |
| 630 | return NULL; |
| 631 | #endif |
| 632 | } |
| 633 | |
| 634 | const struct file_archive_file_backend* file_archive_get_file_backend(const char *path) |
| 635 | { |
| 636 | #if defined(HAVE_7ZIP) || defined(HAVE_ZLIB) |
| 637 | char newpath[PATH_MAX_LENGTH]; |
| 638 | const char *file_ext = NULL; |
| 639 | char *last = NULL; |
| 640 | |
| 641 | strlcpy(newpath, path, sizeof(newpath)); |
| 642 | |
| 643 | if ((last = (char*)path_get_archive_delim(newpath))) |
| 644 | *last = '\0'; |
| 645 | |
| 646 | file_ext = path_get_extension(newpath); |
| 647 | |
| 648 | #ifdef HAVE_7ZIP |
| 649 | if (string_is_equal_noncase(file_ext, "7z")) |
| 650 | return &sevenzip_backend; |
| 651 | #endif |
| 652 | |
| 653 | #ifdef HAVE_ZLIB |
| 654 | if ( string_is_equal_noncase(file_ext, "zip") |
| 655 | || string_is_equal_noncase(file_ext, "apk") |
| 656 | ) |
| 657 | return &zlib_backend; |
| 658 | #endif |
| 659 | #endif |
| 660 | |
| 661 | return NULL; |
| 662 | } |
| 663 | |
| 664 | /** |
| 665 | * file_archive_get_file_crc32: |
| 666 | * @path : filename path of archive |
| 667 | * |
| 668 | * Returns: CRC32 of the specified file in the archive, otherwise 0. |
| 669 | * If no path within the archive is specified, the first |
| 670 | * file found inside is used. |
| 671 | **/ |
| 672 | uint32_t file_archive_get_file_crc32(const char *path) |
| 673 | { |
| 674 | file_archive_transfer_t state; |
| 675 | struct archive_extract_userdata userdata = {0}; |
| 676 | bool returnerr = false; |
| 677 | const char *archive_path = NULL; |
| 678 | bool contains_compressed = path_contains_compressed_file(path); |
| 679 | |
| 680 | if (contains_compressed) |
| 681 | { |
| 682 | archive_path = path_get_archive_delim(path); |
| 683 | |
| 684 | /* move pointer right after the delimiter to give us the path */ |
| 685 | if (archive_path) |
| 686 | archive_path += 1; |
| 687 | } |
| 688 | |
| 689 | state.type = ARCHIVE_TRANSFER_INIT; |
| 690 | state.archive_file = NULL; |
| 691 | #ifdef HAVE_MMAP |
| 692 | state.archive_mmap_fd = 0; |
| 693 | state.archive_mmap_data = NULL; |
| 694 | #endif |
| 695 | state.archive_size = 0; |
| 696 | state.context = NULL; |
| 697 | state.step_total = 0; |
| 698 | state.step_current = 0; |
| 699 | state.backend = NULL; |
| 700 | |
| 701 | /* Initialize and open archive first. |
| 702 | Sets next state type to ITERATE. */ |
| 703 | file_archive_parse_file_iterate(&state, |
| 704 | &returnerr, path, NULL, NULL, |
| 705 | &userdata); |
| 706 | |
| 707 | for (;;) |
| 708 | { |
| 709 | /* Now find the first file in the archive. */ |
| 710 | if (state.type == ARCHIVE_TRANSFER_ITERATE) |
| 711 | file_archive_parse_file_iterate(&state, |
| 712 | &returnerr, path, NULL, NULL, |
| 713 | &userdata); |
| 714 | |
| 715 | /* If no path specified within archive, stop after |
| 716 | * finding the first file. |
| 717 | */ |
| 718 | if (!contains_compressed) |
| 719 | break; |
| 720 | |
| 721 | /* Stop when the right file in the archive is found. */ |
| 722 | if (archive_path) |
| 723 | { |
| 724 | if (string_is_equal(userdata.current_file_path, archive_path)) |
| 725 | break; |
| 726 | } |
| 727 | else |
| 728 | break; |
| 729 | } |
| 730 | |
| 731 | file_archive_parse_file_iterate_stop(&state); |
| 732 | |
| 733 | return userdata.crc; |
| 734 | } |