| 1 | |
| 2 | /* |
| 3 | * BZip3 - A spiritual successor to BZip2. |
| 4 | * Copyright (C) 2022-2024 Kamila Szewczyk |
| 5 | * |
| 6 | * This program is free software: you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU Lesser General Public License as published by the Free |
| 8 | * Software Foundation, either version 3 of the License, or (at your option) |
| 9 | * any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 14 | * more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public License along with |
| 17 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include <ctype.h> |
| 21 | #include <errno.h> |
| 22 | #include <inttypes.h> |
| 23 | #include <limits.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | #include <sys/stat.h> |
| 28 | #include <unistd.h> |
| 29 | |
| 30 | #if defined __MSVCRT__ |
| 31 | #include <fcntl.h> |
| 32 | #include <io.h> |
| 33 | #endif |
| 34 | |
| 35 | #include "common.h" |
| 36 | #include "libbz3.h" |
| 37 | #include "yarg.h" |
| 38 | |
| 39 | #define MODE_DECODE 0 |
| 40 | #define MODE_ENCODE 1 |
| 41 | #define MODE_TEST 2 |
| 42 | #define MODE_RECOVER 3 |
| 43 | |
| 44 | static void version() { |
| 45 | fprintf(stdout, "bzip3 " VERSION |
| 46 | "\n" |
| 47 | "Copyright (C) by Kamila Szewczyk, 2022-2025.\n" |
| 48 | "License: GNU Lesser GPL version 3 <https://www.gnu.org/licenses/lgpl-3.0.en.html>\n"); |
| 49 | } |
| 50 | |
| 51 | static void help() { |
| 52 | fprintf(stdout, |
| 53 | "bzip3 - better and stronger spiritual successor to bzip2.\n" |
| 54 | "Usage: bzip3 [-e/-z/-d/-t/-c/-h/-V] [-b block_size] [-j jobs] files...\n" |
| 55 | "Operations:\n" |
| 56 | " -e/-z, --encode compress data (default)\n" |
| 57 | " -d, --decode decompress data\n" |
| 58 | " -r, --recover attempt at recovering corrupted data\n" |
| 59 | " -t, --test verify validity of compressed data\n" |
| 60 | " -h, --help display an usage overview\n" |
| 61 | " -f, --force force overwriting output if it already exists\n" |
| 62 | " --rm remove input files after successful (de)compression\n" |
| 63 | " -k, --keep keep (don't delete) input files (default)\n" |
| 64 | " -v, --verbose verbose mode (display more information)\n" |
| 65 | " -V, --version display version information\n" |
| 66 | "Extra flags:\n" |
| 67 | " -c, --stdout force writing to standard output\n" |
| 68 | " -b N, --block=N set block size in MiB {16}\n" |
| 69 | " -B, --batch process all files specified as inputs\n" |
| 70 | #ifdef PTHREAD |
| 71 | " -j N, --jobs=N set the amount of parallel threads {1}\n" |
| 72 | #endif |
| 73 | "\n" |
| 74 | "Report bugs to: https://github.com/iczelia/bzip3\n"); |
| 75 | } |
| 76 | |
| 77 | static void xwrite(const void * data, size_t size, size_t len, FILE * des) { |
| 78 | if (len == 0 || size == 0) return; |
| 79 | if (fwrite(data, size, len, des) != len) { |
| 80 | fprintf(stderr, "Write error: %s\n", strerror(errno)); |
| 81 | exit(1); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /* Read any amount of items (from 0 to len) as long as there is no error */ |
| 86 | static size_t xread(void * data, size_t size, size_t len, FILE * des) { |
| 87 | size_t written = fread(data, size, len, des); |
| 88 | if (ferror(des)) { |
| 89 | fprintf(stderr, "Read error: %s\n", strerror(errno)); |
| 90 | exit(1); |
| 91 | } |
| 92 | return written; |
| 93 | } |
| 94 | |
| 95 | /* Either read 0 (due to eof) items or exactly len items */ |
| 96 | static size_t xread_eofcheck(void * data, size_t size, size_t len, FILE * des) { |
| 97 | size_t written = xread(data, size, len, des); |
| 98 | /* feof will be true */ |
| 99 | if (!written) return 0; |
| 100 | if (feof(des)) { |
| 101 | fprintf(stderr, "Error: Corrupt file\n"); |
| 102 | exit(1); |
| 103 | } |
| 104 | return written; |
| 105 | } |
| 106 | |
| 107 | /* Always read len items */ |
| 108 | static void xread_noeof(void * data, size_t size, size_t len, FILE * des) { |
| 109 | if (!xread_eofcheck(data, size, len, des)) { |
| 110 | fprintf(stderr, "Error: Corrupt file\n"); |
| 111 | exit(1); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | static void close_out_file(FILE * des) { |
| 116 | if (des) { |
| 117 | int outfd = fileno(des); |
| 118 | |
| 119 | if (fflush(des)) { |
| 120 | fprintf(stderr, "Error: Failed on fflush: %s\n", strerror(errno)); |
| 121 | exit(1); |
| 122 | } |
| 123 | |
| 124 | #ifdef __linux__ |
| 125 | while (1) { |
| 126 | int status = fsync(outfd); |
| 127 | if (status == -1) { |
| 128 | if (errno == EINVAL) break; |
| 129 | if (errno == EINTR) continue; |
| 130 | fprintf(stderr, "Error: Failed on fsync: %s\n", strerror(errno)); |
| 131 | exit(1); |
| 132 | } |
| 133 | break; |
| 134 | } |
| 135 | #endif |
| 136 | |
| 137 | if (des != stdout && fclose(des)) { |
| 138 | fprintf(stderr, "Error: Failed on fclose: %s\n", strerror(errno)); |
| 139 | exit(1); |
| 140 | } |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | static void remove_in_file(char * file_name, FILE * output_des) { |
| 145 | if (file_name == NULL) { |
| 146 | return; |
| 147 | } |
| 148 | if (output_des == stdout) { |
| 149 | return; |
| 150 | } |
| 151 | if (remove(file_name)) { |
| 152 | fprintf(stderr, "Error: failed to remove input file `%s': %s\n", file_name, strerror(errno)); |
| 153 | exit(1); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | static int process(FILE * input_des, FILE * output_des, int mode, int block_size, int workers, int verbose, |
| 158 | char * file_name) { |
| 159 | uint64_t bytes_read = 0, bytes_written = 0; |
| 160 | |
| 161 | if ((mode == MODE_ENCODE && isatty(fileno(output_des))) || |
| 162 | ((mode == MODE_DECODE || mode == MODE_TEST || mode == MODE_RECOVER) && isatty(fileno(input_des)))) { |
| 163 | fprintf(stderr, "Refusing to read/write binary data from/to the terminal.\n"); |
| 164 | return 1; |
| 165 | } |
| 166 | |
| 167 | // Reset errno after the isatty() call. |
| 168 | errno = 0; |
| 169 | |
| 170 | u8 byteswap_buf[4]; |
| 171 | |
| 172 | switch (mode) { |
| 173 | case MODE_ENCODE: |
| 174 | xwrite("BZ3v1", 5, 1, output_des); |
| 175 | |
| 176 | write_neutral_s32(byteswap_buf, block_size); |
| 177 | xwrite(byteswap_buf, 4, 1, output_des); |
| 178 | |
| 179 | bytes_written += 9; |
| 180 | break; |
| 181 | case MODE_RECOVER: |
| 182 | case MODE_DECODE: |
| 183 | case MODE_TEST: { |
| 184 | char signature[5]; |
| 185 | |
| 186 | if (xread(signature, 5, 1, input_des) != 1 || strncmp(signature, "BZ3v1", 5) != 0) { |
| 187 | fprintf(stderr, "Invalid signature.\n"); |
| 188 | return 1; |
| 189 | } |
| 190 | |
| 191 | xread_noeof(byteswap_buf, 4, 1, input_des); |
| 192 | |
| 193 | block_size = read_neutral_s32(byteswap_buf); |
| 194 | |
| 195 | if (block_size < KiB(65) || block_size > MiB(511)) { |
| 196 | fprintf(stderr, |
| 197 | "The input file is corrupted. Reason: Invalid block " |
| 198 | "size in the header.\n"); |
| 199 | if (mode == MODE_RECOVER) { |
| 200 | fprintf(stderr, "Recovery mode: Proceeding.\n"); |
| 201 | block_size = MiB(511); |
| 202 | } else { |
| 203 | return 1; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | bytes_read += 9; |
| 208 | break; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | #ifdef PTHREAD |
| 213 | if (workers > 64 || workers < 0) { |
| 214 | fprintf(stderr, "Number of workers must be between 0 and 64.\n"); |
| 215 | return 1; |
| 216 | } |
| 217 | |
| 218 | if (workers <= 1) { |
| 219 | #endif |
| 220 | struct bz3_state * state = bz3_new(block_size); |
| 221 | |
| 222 | if (state == NULL) { |
| 223 | fprintf(stderr, "Failed to create a block encoder state.\n"); |
| 224 | return 1; |
| 225 | } |
| 226 | |
| 227 | size_t buffer_size = bz3_bound(block_size); |
| 228 | u8 * buffer = malloc(buffer_size); |
| 229 | |
| 230 | if (!buffer) { |
| 231 | fprintf(stderr, "Failed to allocate memory.\n"); |
| 232 | return 1; |
| 233 | } |
| 234 | |
| 235 | if (mode == MODE_ENCODE) { |
| 236 | s32 read_count; |
| 237 | while (!feof(input_des)) { |
| 238 | read_count = xread(buffer, 1, block_size, input_des); |
| 239 | bytes_read += read_count; |
| 240 | |
| 241 | if (read_count == 0) break; |
| 242 | |
| 243 | s32 new_size = bz3_encode_block(state, buffer, read_count); |
| 244 | if (new_size == -1) { |
| 245 | fprintf(stderr, "Failed to encode a block: %s\n", bz3_strerror(state)); |
| 246 | return 1; |
| 247 | } |
| 248 | |
| 249 | write_neutral_s32(byteswap_buf, new_size); |
| 250 | xwrite(byteswap_buf, 4, 1, output_des); |
| 251 | write_neutral_s32(byteswap_buf, read_count); |
| 252 | xwrite(byteswap_buf, 4, 1, output_des); |
| 253 | xwrite(buffer, new_size, 1, output_des); |
| 254 | bytes_written += 8 + new_size; |
| 255 | } |
| 256 | fflush(output_des); |
| 257 | } else if (mode == MODE_DECODE) { |
| 258 | s32 new_size, old_size; |
| 259 | while (!feof(input_des)) { |
| 260 | if (!xread_eofcheck(&byteswap_buf, 1, 4, input_des)) continue; |
| 261 | |
| 262 | new_size = read_neutral_s32(byteswap_buf); |
| 263 | xread_noeof(&byteswap_buf, 1, 4, input_des); |
| 264 | old_size = read_neutral_s32(byteswap_buf); |
| 265 | if (old_size > bz3_bound(block_size) || new_size > bz3_bound(block_size)) { |
| 266 | fprintf(stderr, "Failed to decode a block: Inconsistent headers.\n"); |
| 267 | return 1; |
| 268 | } |
| 269 | xread_noeof(buffer, 1, new_size, input_des); |
| 270 | bytes_read += 8 + new_size; |
| 271 | if (bz3_decode_block(state, buffer, buffer_size, new_size, old_size) == -1) { |
| 272 | fprintf(stderr, "Failed to decode a block: %s\n", bz3_strerror(state)); |
| 273 | return 1; |
| 274 | } |
| 275 | xwrite(buffer, old_size, 1, output_des); |
| 276 | bytes_written += old_size; |
| 277 | } |
| 278 | fflush(output_des); |
| 279 | } else if (mode == MODE_RECOVER) { |
| 280 | s32 new_size, old_size; |
| 281 | while (!feof(input_des)) { |
| 282 | if (!xread_eofcheck(&byteswap_buf, 1, 4, input_des)) continue; |
| 283 | |
| 284 | new_size = read_neutral_s32(byteswap_buf); |
| 285 | xread_noeof(&byteswap_buf, 1, 4, input_des); |
| 286 | old_size = read_neutral_s32(byteswap_buf); |
| 287 | if (old_size > bz3_bound(block_size) || new_size > bz3_bound(block_size)) { |
| 288 | fprintf(stderr, "Failed to decode a block: Inconsistent headers.\n"); |
| 289 | return 1; |
| 290 | } |
| 291 | xread_noeof(buffer, 1, new_size, input_des); |
| 292 | bytes_read += 8 + new_size; |
| 293 | if (bz3_decode_block(state, buffer, buffer_size, new_size, old_size) == -1) { |
| 294 | fprintf(stderr, "Writing invalid block: %s\n", bz3_strerror(state)); |
| 295 | } |
| 296 | xwrite(buffer, old_size, 1, output_des); |
| 297 | bytes_written += old_size; |
| 298 | } |
| 299 | fflush(output_des); |
| 300 | } else if (mode == MODE_TEST) { |
| 301 | s32 new_size, old_size; |
| 302 | while (!feof(input_des)) { |
| 303 | if (!xread_eofcheck(&byteswap_buf, 1, 4, input_des)) continue; |
| 304 | new_size = read_neutral_s32(byteswap_buf); |
| 305 | xread_noeof(&byteswap_buf, 1, 4, input_des); |
| 306 | old_size = read_neutral_s32(byteswap_buf); |
| 307 | if (old_size > bz3_bound(block_size) || new_size > bz3_bound(block_size)) { |
| 308 | fprintf(stderr, "Failed to decode a block: Inconsistent headers.\n"); |
| 309 | return 1; |
| 310 | } |
| 311 | xread_noeof(buffer, 1, new_size, input_des); |
| 312 | bytes_read += 8 + new_size; |
| 313 | bytes_written += old_size; |
| 314 | if (bz3_decode_block(state, buffer, buffer_size, new_size, old_size) == -1) { |
| 315 | fprintf(stderr, "Failed to decode a block: %s\n", bz3_strerror(state)); |
| 316 | return 1; |
| 317 | } |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | if (bz3_last_error(state) != BZ3_OK && mode != MODE_RECOVER) { |
| 322 | fprintf(stderr, "Failed to read data: %s\n", bz3_strerror(state)); |
| 323 | return 1; |
| 324 | } |
| 325 | |
| 326 | free(buffer); |
| 327 | |
| 328 | bz3_free(state); |
| 329 | #ifdef PTHREAD |
| 330 | } else { |
| 331 | struct bz3_state * states[workers]; |
| 332 | u8 * buffers[workers]; |
| 333 | s32 sizes[workers]; |
| 334 | size_t buffer_sizes[workers]; |
| 335 | s32 old_sizes[workers]; |
| 336 | for (s32 i = 0; i < workers; i++) { |
| 337 | states[i] = bz3_new(block_size); |
| 338 | if (states[i] == NULL) { |
| 339 | fprintf(stderr, "Failed to create a block encoder state.\n"); |
| 340 | return 1; |
| 341 | } |
| 342 | size_t buffer_size = bz3_bound(block_size); |
| 343 | buffer_sizes[i] = buffer_size; |
| 344 | buffers[i] = malloc(buffer_size); |
| 345 | if (!buffers[i]) { |
| 346 | fprintf(stderr, "Failed to allocate memory.\n"); |
| 347 | return 1; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | if (mode == MODE_ENCODE) { |
| 352 | while (!feof(input_des)) { |
| 353 | s32 i = 0; |
| 354 | for (; i < workers; i++) { |
| 355 | size_t read_count = xread(buffers[i], 1, block_size, input_des); |
| 356 | bytes_read += read_count; |
| 357 | sizes[i] = old_sizes[i] = read_count; |
| 358 | if (read_count < block_size) { |
| 359 | i++; |
| 360 | break; |
| 361 | } |
| 362 | } |
| 363 | bz3_encode_blocks(states, buffers, sizes, i); |
| 364 | for (s32 j = 0; j < i; j++) { |
| 365 | if (bz3_last_error(states[j]) != BZ3_OK) { |
| 366 | fprintf(stderr, "Failed to encode data: %s\n", bz3_strerror(states[j])); |
| 367 | return 1; |
| 368 | } |
| 369 | } |
| 370 | for (s32 j = 0; j < i; j++) { |
| 371 | write_neutral_s32(byteswap_buf, sizes[j]); |
| 372 | xwrite(byteswap_buf, 4, 1, output_des); |
| 373 | write_neutral_s32(byteswap_buf, old_sizes[j]); |
| 374 | xwrite(byteswap_buf, 4, 1, output_des); |
| 375 | xwrite(buffers[j], sizes[j], 1, output_des); |
| 376 | bytes_written += 8 + sizes[j]; |
| 377 | } |
| 378 | } |
| 379 | fflush(output_des); |
| 380 | } else if (mode == MODE_DECODE) { |
| 381 | while (!feof(input_des)) { |
| 382 | s32 i = 0; |
| 383 | for (; i < workers; i++) { |
| 384 | if (!xread_eofcheck(&byteswap_buf, 1, 4, input_des)) break; |
| 385 | sizes[i] = read_neutral_s32(byteswap_buf); |
| 386 | xread_noeof(&byteswap_buf, 1, 4, input_des); |
| 387 | old_sizes[i] = read_neutral_s32(byteswap_buf); |
| 388 | if (old_sizes[i] > bz3_bound(block_size) || sizes[i] > bz3_bound(block_size)) { |
| 389 | fprintf(stderr, "Failed to decode a block: Inconsistent headers.\n"); |
| 390 | return 1; |
| 391 | } |
| 392 | xread_noeof(buffers[i], 1, sizes[i], input_des); |
| 393 | bytes_read += 8 + sizes[i]; |
| 394 | } |
| 395 | bz3_decode_blocks(states, buffers, buffer_sizes, sizes, old_sizes, i); |
| 396 | for (s32 j = 0; j < i; j++) { |
| 397 | if (bz3_last_error(states[j]) != BZ3_OK) { |
| 398 | fprintf(stderr, "Failed to decode data: %s\n", bz3_strerror(states[j])); |
| 399 | return 1; |
| 400 | } |
| 401 | } |
| 402 | for (s32 j = 0; j < i; j++) { |
| 403 | xwrite(buffers[j], old_sizes[j], 1, output_des); |
| 404 | bytes_written += old_sizes[j]; |
| 405 | } |
| 406 | } |
| 407 | fflush(output_des); |
| 408 | } else if (mode == MODE_RECOVER) { |
| 409 | while (!feof(input_des)) { |
| 410 | s32 i = 0; |
| 411 | for (; i < workers; i++) { |
| 412 | if (!xread_eofcheck(&byteswap_buf, 1, 4, input_des)) break; |
| 413 | sizes[i] = read_neutral_s32(byteswap_buf); |
| 414 | xread_noeof(&byteswap_buf, 1, 4, input_des); |
| 415 | old_sizes[i] = read_neutral_s32(byteswap_buf); |
| 416 | if (old_sizes[i] > bz3_bound(block_size) || sizes[i] > bz3_bound(block_size)) { |
| 417 | fprintf(stderr, "Failed to decode a block: Inconsistent headers.\n"); |
| 418 | return 1; |
| 419 | } |
| 420 | xread_noeof(buffers[i], 1, sizes[i], input_des); |
| 421 | bytes_read += 8 + sizes[i]; |
| 422 | } |
| 423 | bz3_decode_blocks(states, buffers, buffer_sizes, sizes, old_sizes, i); |
| 424 | for (s32 j = 0; j < i; j++) { |
| 425 | if (bz3_last_error(states[j]) != BZ3_OK) { |
| 426 | fprintf(stderr, "Writing invalid block: %s\n", bz3_strerror(states[j])); |
| 427 | } |
| 428 | } |
| 429 | for (s32 j = 0; j < i; j++) { |
| 430 | xwrite(buffers[j], old_sizes[j], 1, output_des); |
| 431 | bytes_written += old_sizes[j]; |
| 432 | } |
| 433 | } |
| 434 | fflush(output_des); |
| 435 | } else if (mode == MODE_TEST) { |
| 436 | while (!feof(input_des)) { |
| 437 | s32 i = 0; |
| 438 | for (; i < workers; i++) { |
| 439 | if (!xread_eofcheck(&byteswap_buf, 1, 4, input_des)) break; |
| 440 | sizes[i] = read_neutral_s32(byteswap_buf); |
| 441 | xread_noeof(&byteswap_buf, 1, 4, input_des); |
| 442 | old_sizes[i] = read_neutral_s32(byteswap_buf); |
| 443 | if (old_sizes[i] > bz3_bound(block_size) || sizes[i] > bz3_bound(block_size)) { |
| 444 | fprintf(stderr, "Failed to decode a block: Inconsistent headers.\n"); |
| 445 | return 1; |
| 446 | } |
| 447 | xread_noeof(buffers[i], 1, sizes[i], input_des); |
| 448 | bytes_read += 8 + sizes[i]; |
| 449 | bytes_written += old_sizes[i]; |
| 450 | } |
| 451 | bz3_decode_blocks(states, buffers, buffer_sizes, sizes, old_sizes, i); |
| 452 | for (s32 j = 0; j < i; j++) { |
| 453 | if (bz3_last_error(states[j]) != BZ3_OK) { |
| 454 | fprintf(stderr, "Failed to decode data: %s\n", bz3_strerror(states[j])); |
| 455 | return 1; |
| 456 | } |
| 457 | } |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | for (s32 i = 0; i < workers; i++) { |
| 462 | free(buffers[i]); |
| 463 | bz3_free(states[i]); |
| 464 | } |
| 465 | } |
| 466 | #endif |
| 467 | |
| 468 | if (verbose) { |
| 469 | if (file_name) fprintf(stderr, " %s:", file_name); |
| 470 | if (mode == MODE_ENCODE) |
| 471 | fprintf(stderr, "\t%" PRIu64 " -> %" PRIu64 " bytes, %.2f%%, %.2f bpb\n", bytes_read, bytes_written, |
| 472 | (double)bytes_written * 100.0 / bytes_read, (double)bytes_written * 8.0 / bytes_read); |
| 473 | else if (mode == MODE_DECODE) |
| 474 | fprintf(stderr, "\t%" PRIu64 " -> %" PRIu64 " bytes, %.2f%%, %.2f bpb\n", bytes_read, bytes_written, |
| 475 | (double)bytes_read * 100.0 / bytes_written, (double)bytes_read * 8.0 / bytes_written); |
| 476 | else |
| 477 | fprintf(stderr, "\tOK, %" PRIu64 " -> %" PRIu64 " bytes, %.2f%%, %.2f bpb\n", bytes_read, bytes_written, |
| 478 | (double)bytes_read * 100.0 / bytes_written, (double)bytes_read * 8.0 / bytes_written); |
| 479 | } |
| 480 | |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | static int is_dir(const char * path) { |
| 485 | struct stat sb; |
| 486 | if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) return 1; |
| 487 | return 0; |
| 488 | } |
| 489 | |
| 490 | static int is_numeric(const char * str) { |
| 491 | for (; *str; str++) |
| 492 | if (!isdigit(*str)) return 0; |
| 493 | return 1; |
| 494 | } |
| 495 | |
| 496 | static FILE * open_output(char * output, int force) { |
| 497 | FILE * output_des = NULL; |
| 498 | |
| 499 | if (output != NULL) { |
| 500 | if (is_dir(output)) { |
| 501 | fprintf(stderr, "Error: output file `%s' is a directory.\n", output); |
| 502 | exit(1); |
| 503 | } |
| 504 | |
| 505 | if (access(output, F_OK) == 0) { |
| 506 | if (!force) { |
| 507 | fprintf(stderr, "Error: output file `%s' already exists. Use -f to force overwrite.\n", output); |
| 508 | exit(1); |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | output_des = fopen(output, "wb"); |
| 513 | if (output_des == NULL) { |
| 514 | fprintf(stderr, "Error: failed to open output file `%s': %s\n", output, strerror(errno)); |
| 515 | exit(1); |
| 516 | } |
| 517 | } else { |
| 518 | output_des = stdout; |
| 519 | } |
| 520 | |
| 521 | return output_des; |
| 522 | } |
| 523 | |
| 524 | static FILE * open_input(char * input) { |
| 525 | FILE * input_des = NULL; |
| 526 | |
| 527 | if (input != NULL) { |
| 528 | if (is_dir(input)) { |
| 529 | fprintf(stderr, "Error: input `%s' is a directory.\n", input); |
| 530 | exit(1); |
| 531 | } |
| 532 | |
| 533 | input_des = fopen(input, "rb"); |
| 534 | if (input_des == NULL) { |
| 535 | fprintf(stderr, "Error: failed to open input file `%s': %s\n", input, strerror(errno)); |
| 536 | exit(1); |
| 537 | } |
| 538 | } else { |
| 539 | input_des = stdin; |
| 540 | } |
| 541 | |
| 542 | return input_des; |
| 543 | } |
| 544 | |
| 545 | int main(int argc, char * argv[]) { |
| 546 | int mode = MODE_ENCODE; |
| 547 | |
| 548 | // input and output file names |
| 549 | char *input = NULL, *output = NULL; |
| 550 | char *f1 = NULL, *f2 = NULL; |
| 551 | int force = 0; |
| 552 | |
| 553 | // command line arguments |
| 554 | int force_stdstreams = 0, workers = 0, batch = 0, verbose = 0, remove_input_file = 0; |
| 555 | |
| 556 | // the block size |
| 557 | u32 block_size = MiB(16); |
| 558 | |
| 559 | enum { RM_OPTION = CHAR_MAX + 1 }; |
| 560 | |
| 561 | yarg_options opt[] = { |
| 562 | { 'e', no_argument, "encode" }, |
| 563 | { 'z', no_argument, "encode" }, /* alias */ |
| 564 | { 'd', no_argument, "decode" }, |
| 565 | { 't', no_argument, "test" }, |
| 566 | { 'c', no_argument, "stdout" }, |
| 567 | { 'f', no_argument, "force" }, |
| 568 | { 'r', no_argument, "recover" }, |
| 569 | { 'h', no_argument, "help" }, |
| 570 | { RM_OPTION, no_argument, "rm" }, |
| 571 | { 'k', no_argument, "keep" }, |
| 572 | { 'V', no_argument, "version" }, |
| 573 | { 'v', no_argument, "verbose" }, |
| 574 | { 'b', required_argument, "block" }, |
| 575 | { 'B', no_argument, "batch" }, |
| 576 | #ifdef PTHREAD |
| 577 | { 'j', required_argument, "jobs" }, |
| 578 | #endif |
| 579 | { 0, no_argument, NULL } |
| 580 | }; |
| 581 | yarg_settings settings = { |
| 582 | .dash_dash = true, |
| 583 | .style = YARG_STYLE_UNIX, |
| 584 | }; |
| 585 | yarg_result * res = yarg_parse(argc, argv, opt, settings); |
| 586 | if (!res) { |
| 587 | fprintf(stderr, "bzip3: out of memory.\n"); |
| 588 | return 1; |
| 589 | } |
| 590 | if (res->error) { |
| 591 | fputs(res->error, stderr); |
| 592 | fputs("Try 'bzip3 --help' for more information.\n", stderr); |
| 593 | return 1; |
| 594 | } |
| 595 | // `res' is not freed later on as it has the approximate lifetime |
| 596 | // equal to the lifetime of the program overall. |
| 597 | for (int i = 0; i < res->argc; i++) { |
| 598 | switch(res->args[i].opt) { |
| 599 | case 'e': case 'z': mode = MODE_ENCODE; break; |
| 600 | case 'd': mode = MODE_DECODE; break; |
| 601 | case 'r': mode = MODE_RECOVER; break; |
| 602 | case 't': mode = MODE_TEST; break; |
| 603 | case 'c': force_stdstreams = 1; break; |
| 604 | case 'f': force = 1; break; |
| 605 | case RM_OPTION: remove_input_file = 1; break; |
| 606 | case 'k': break; |
| 607 | case 'h': help(); return 0; |
| 608 | case 'V': version(); return 0; |
| 609 | case 'B': batch = 1; break; |
| 610 | case 'v': verbose = 1; break; |
| 611 | case 'b': |
| 612 | if (!is_numeric(res->args[i].arg)) { |
| 613 | fprintf(stderr, "bzip3: invalid block size: %s\n", res->args[i].arg); |
| 614 | return 1; |
| 615 | } |
| 616 | block_size = MiB(atoi(res->args[i].arg)); |
| 617 | break; |
| 618 | #ifdef PTHREAD |
| 619 | case 'j': |
| 620 | if (!is_numeric(res->args[i].arg)) { |
| 621 | fprintf(stderr, "bzip3: invalid amount of jobs: %s\n", res->args[i].arg); |
| 622 | return 1; |
| 623 | } |
| 624 | workers = atoi(res->args[i].arg); |
| 625 | break; |
| 626 | #endif |
| 627 | } |
| 628 | } |
| 629 | |
| 630 | #if defined(__MSVCRT__) |
| 631 | setmode(STDIN_FILENO, O_BINARY); |
| 632 | setmode(STDOUT_FILENO, O_BINARY); |
| 633 | #endif |
| 634 | |
| 635 | if (block_size < KiB(65) || block_size > MiB(511)) { |
| 636 | fprintf(stderr, "Block size must be between 65 KiB and 511 MiB.\n"); |
| 637 | return 1; |
| 638 | } |
| 639 | |
| 640 | if (batch && res->pos_argc) { |
| 641 | switch (mode) { |
| 642 | case MODE_ENCODE: |
| 643 | /* Encode each of the files. */ |
| 644 | for (int i = 0; i < res->pos_argc; i++) { |
| 645 | char * arg = res->pos_args[i]; |
| 646 | |
| 647 | FILE * input_des = open_input(arg); |
| 648 | char * output_name; |
| 649 | if (force_stdstreams) |
| 650 | output_name = NULL; |
| 651 | else { |
| 652 | output_name = malloc(strlen(arg) + 5); |
| 653 | if (!output_name) { |
| 654 | fprintf(stderr, "Failed to allocate memory.\n"); |
| 655 | return 1; |
| 656 | } |
| 657 | strcpy(output_name, arg); |
| 658 | strcat(output_name, ".bz3"); |
| 659 | } |
| 660 | |
| 661 | FILE * output_des = open_output(output_name, force); |
| 662 | process(input_des, output_des, mode, block_size, workers, verbose, arg); |
| 663 | |
| 664 | fclose(input_des); |
| 665 | close_out_file(output_des); |
| 666 | if (!force_stdstreams) free(output_name); |
| 667 | if (remove_input_file) { |
| 668 | remove_in_file(arg, output_des); |
| 669 | } |
| 670 | } |
| 671 | break; |
| 672 | case MODE_RECOVER: |
| 673 | case MODE_DECODE: |
| 674 | /* Decode each of the files. */ |
| 675 | for (int i = 0; i < res->pos_argc; i++) { |
| 676 | char * arg = res->pos_args[i]; |
| 677 | |
| 678 | FILE * input_des = open_input(arg); |
| 679 | char * output_name; |
| 680 | if (force_stdstreams) |
| 681 | output_name = NULL; |
| 682 | else { |
| 683 | output_name = malloc(strlen(arg) + 1); |
| 684 | if (!output_name) { |
| 685 | fprintf(stderr, "Failed to allocate memory.\n"); |
| 686 | return 1; |
| 687 | } |
| 688 | strcpy(output_name, arg); |
| 689 | if (strlen(output_name) > 4 && !strcmp(output_name + strlen(output_name) - 4, ".bz3")) |
| 690 | output_name[strlen(output_name) - 4] = 0; |
| 691 | else { |
| 692 | fprintf(stderr, "Warning: file %s has an unknown extension, skipping.\n", arg); |
| 693 | return 1; |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | FILE * output_des = open_output(output_name, force); |
| 698 | process(input_des, output_des, mode, block_size, workers, verbose, arg); |
| 699 | |
| 700 | fclose(input_des); |
| 701 | close_out_file(output_des); |
| 702 | if (!force_stdstreams) free(output_name); |
| 703 | if (remove_input_file) { |
| 704 | remove_in_file(arg, output_des); |
| 705 | } |
| 706 | } |
| 707 | break; |
| 708 | case MODE_TEST: |
| 709 | /* Test each of the files. */ |
| 710 | for (int i = 0; i < res->pos_argc; i++) { |
| 711 | char * arg = res->pos_args[i]; |
| 712 | |
| 713 | FILE * input_des = open_input(arg); |
| 714 | process(input_des, NULL, mode, block_size, workers, verbose, arg); |
| 715 | fclose(input_des); |
| 716 | } |
| 717 | break; |
| 718 | } |
| 719 | |
| 720 | if (fclose(stdout)) { |
| 721 | fprintf(stderr, "Error: Failed on fclose(stdout): %s\n", strerror(errno)); |
| 722 | return 1; |
| 723 | } |
| 724 | |
| 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | for (int i = 0; i < res->pos_argc; i++) { |
| 729 | char * arg = res->pos_args[i]; |
| 730 | |
| 731 | if (f1 != NULL && f2 != NULL) { |
| 732 | fprintf(stderr, "Error: too many files specified.\n"); |
| 733 | return 1; |
| 734 | } |
| 735 | |
| 736 | if (f1 == NULL) |
| 737 | f1 = arg; |
| 738 | else |
| 739 | f2 = arg; |
| 740 | } |
| 741 | |
| 742 | if (f1 == NULL && f2 == NULL) |
| 743 | input = NULL, output = NULL; |
| 744 | else if (mode == MODE_TEST) |
| 745 | input = f1; |
| 746 | else { |
| 747 | if (mode == MODE_ENCODE) { |
| 748 | if (f2 == NULL) { |
| 749 | // encode from f1? |
| 750 | input = f1; |
| 751 | if (force_stdstreams) |
| 752 | output = NULL; |
| 753 | else { |
| 754 | output = malloc(strlen(f1) + 5); |
| 755 | if (!output) { |
| 756 | fprintf(stderr, "Failed to allocate memory.\n"); |
| 757 | return 1; |
| 758 | } |
| 759 | strcpy(output, f1); |
| 760 | strcat(output, ".bz3"); |
| 761 | } |
| 762 | } else { |
| 763 | // encode from f1 to f2. |
| 764 | input = f1; |
| 765 | output = f2; |
| 766 | } |
| 767 | } else if (mode == MODE_DECODE || mode == MODE_RECOVER) { |
| 768 | if (f2 == NULL) { |
| 769 | // decode from f1 to stdout. |
| 770 | input = f1; |
| 771 | if (force_stdstreams) |
| 772 | output = NULL; |
| 773 | else { |
| 774 | output = malloc(strlen(f1) + 1); |
| 775 | if (!output) { |
| 776 | fprintf(stderr, "Failed to allocate memory.\n"); |
| 777 | return 1; |
| 778 | } |
| 779 | strcpy(output, f1); |
| 780 | if (strlen(output) > 4 && !strcmp(output + strlen(output) - 4, ".bz3")) |
| 781 | output[strlen(output) - 4] = 0; |
| 782 | else { |
| 783 | fprintf(stderr, "Warning: file %s has an unknown extension, skipping.\n", f1); |
| 784 | return 1; |
| 785 | } |
| 786 | } |
| 787 | } else { |
| 788 | // decode from f1 to f2. |
| 789 | input = f1; |
| 790 | output = f2; |
| 791 | } |
| 792 | } |
| 793 | } |
| 794 | |
| 795 | FILE *input_des = NULL, *output_des = NULL; |
| 796 | |
| 797 | input_des = open_input(input); |
| 798 | output_des = mode != MODE_TEST ? open_output(output, force) : NULL; |
| 799 | |
| 800 | if (output != f2) free(output); |
| 801 | |
| 802 | int r = process(input_des, output_des, mode, block_size, workers, verbose, input); |
| 803 | |
| 804 | fclose(input_des); |
| 805 | close_out_file(output_des); |
| 806 | if (fclose(stdout)) { |
| 807 | fprintf(stderr, "Error: Failed on fclose(stdout): %s\n", strerror(errno)); |
| 808 | return 1; |
| 809 | } |
| 810 | if (remove_input_file) { |
| 811 | remove_in_file(input, output_des); |
| 812 | } |
| 813 | return r; |
| 814 | } |
