| 1 | /* |
| 2 | * Copyright (c) 2006 Rene Scharfe |
| 3 | */ |
| 4 | |
| 5 | #define USE_THE_REPOSITORY_VARIABLE |
| 6 | |
| 7 | #include "git-compat-util.h" |
| 8 | #include "config.h" |
| 9 | #include "archive.h" |
| 10 | #include "gettext.h" |
| 11 | #include "git-zlib.h" |
| 12 | #include "hex.h" |
| 13 | #include "utf8.h" |
| 14 | #include "odb.h" |
| 15 | #include "odb/streaming.h" |
| 16 | #include "strbuf.h" |
| 17 | #include "userdiff.h" |
| 18 | #include "write-or-die.h" |
| 19 | #include "xdiff-interface.h" |
| 20 | #include "date.h" |
| 21 | |
| 22 | static int zip_date; |
| 23 | static int zip_time; |
| 24 | |
| 25 | /* We only care about the "buf" part here. */ |
| 26 | static struct strbuf zip_dir; |
| 27 | |
| 28 | static uintmax_t zip_offset; |
| 29 | static uint64_t zip_dir_entries; |
| 30 | |
| 31 | static unsigned int max_creator_version; |
| 32 | |
| 33 | #define ZIP_STREAM (1 << 3) |
| 34 | #define ZIP_UTF8 (1 << 11) |
| 35 | |
| 36 | enum zip_method { |
| 37 | ZIP_METHOD_STORE = 0, |
| 38 | ZIP_METHOD_DEFLATE = 8 |
| 39 | }; |
| 40 | |
| 41 | struct zip_local_header { |
| 42 | unsigned char magic[4]; |
| 43 | unsigned char version[2]; |
| 44 | unsigned char flags[2]; |
| 45 | unsigned char compression_method[2]; |
| 46 | unsigned char mtime[2]; |
| 47 | unsigned char mdate[2]; |
| 48 | unsigned char crc32[4]; |
| 49 | unsigned char compressed_size[4]; |
| 50 | unsigned char size[4]; |
| 51 | unsigned char filename_length[2]; |
| 52 | unsigned char extra_length[2]; |
| 53 | unsigned char _end[1]; |
| 54 | }; |
| 55 | |
| 56 | struct zip_data_desc { |
| 57 | unsigned char magic[4]; |
| 58 | unsigned char crc32[4]; |
| 59 | unsigned char compressed_size[4]; |
| 60 | unsigned char size[4]; |
| 61 | unsigned char _end[1]; |
| 62 | }; |
| 63 | |
| 64 | struct zip64_data_desc { |
| 65 | unsigned char magic[4]; |
| 66 | unsigned char crc32[4]; |
| 67 | unsigned char compressed_size[8]; |
| 68 | unsigned char size[8]; |
| 69 | unsigned char _end[1]; |
| 70 | }; |
| 71 | |
| 72 | struct zip_dir_trailer { |
| 73 | unsigned char magic[4]; |
| 74 | unsigned char disk[2]; |
| 75 | unsigned char directory_start_disk[2]; |
| 76 | unsigned char entries_on_this_disk[2]; |
| 77 | unsigned char entries[2]; |
| 78 | unsigned char size[4]; |
| 79 | unsigned char offset[4]; |
| 80 | unsigned char comment_length[2]; |
| 81 | unsigned char _end[1]; |
| 82 | }; |
| 83 | |
| 84 | struct zip_extra_mtime { |
| 85 | unsigned char magic[2]; |
| 86 | unsigned char extra_size[2]; |
| 87 | unsigned char flags[1]; |
| 88 | unsigned char mtime[4]; |
| 89 | unsigned char _end[1]; |
| 90 | }; |
| 91 | |
| 92 | struct zip64_extra { |
| 93 | unsigned char magic[2]; |
| 94 | unsigned char extra_size[2]; |
| 95 | unsigned char size[8]; |
| 96 | unsigned char compressed_size[8]; |
| 97 | unsigned char _end[1]; |
| 98 | }; |
| 99 | |
| 100 | struct zip64_dir_trailer { |
| 101 | unsigned char magic[4]; |
| 102 | unsigned char record_size[8]; |
| 103 | unsigned char creator_version[2]; |
| 104 | unsigned char version[2]; |
| 105 | unsigned char disk[4]; |
| 106 | unsigned char directory_start_disk[4]; |
| 107 | unsigned char entries_on_this_disk[8]; |
| 108 | unsigned char entries[8]; |
| 109 | unsigned char size[8]; |
| 110 | unsigned char offset[8]; |
| 111 | unsigned char _end[1]; |
| 112 | }; |
| 113 | |
| 114 | struct zip64_dir_trailer_locator { |
| 115 | unsigned char magic[4]; |
| 116 | unsigned char disk[4]; |
| 117 | unsigned char offset[8]; |
| 118 | unsigned char number_of_disks[4]; |
| 119 | unsigned char _end[1]; |
| 120 | }; |
| 121 | |
| 122 | /* |
| 123 | * On ARM, padding is added at the end of the struct, so a simple |
| 124 | * sizeof(struct ...) reports two bytes more than the payload size |
| 125 | * we're interested in. |
| 126 | */ |
| 127 | #define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end) |
| 128 | #define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end) |
| 129 | #define ZIP64_DATA_DESC_SIZE offsetof(struct zip64_data_desc, _end) |
| 130 | #define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end) |
| 131 | #define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end) |
| 132 | #define ZIP_EXTRA_MTIME_SIZE offsetof(struct zip_extra_mtime, _end) |
| 133 | #define ZIP_EXTRA_MTIME_PAYLOAD_SIZE \ |
| 134 | (ZIP_EXTRA_MTIME_SIZE - offsetof(struct zip_extra_mtime, flags)) |
| 135 | #define ZIP64_EXTRA_SIZE offsetof(struct zip64_extra, _end) |
| 136 | #define ZIP64_EXTRA_PAYLOAD_SIZE \ |
| 137 | (ZIP64_EXTRA_SIZE - offsetof(struct zip64_extra, size)) |
| 138 | #define ZIP64_DIR_TRAILER_SIZE offsetof(struct zip64_dir_trailer, _end) |
| 139 | #define ZIP64_DIR_TRAILER_RECORD_SIZE \ |
| 140 | (ZIP64_DIR_TRAILER_SIZE - \ |
| 141 | offsetof(struct zip64_dir_trailer, creator_version)) |
| 142 | #define ZIP64_DIR_TRAILER_LOCATOR_SIZE \ |
| 143 | offsetof(struct zip64_dir_trailer_locator, _end) |
| 144 | |
| 145 | static void copy_le16(unsigned char *dest, unsigned int n) |
| 146 | { |
| 147 | dest[0] = 0xff & n; |
| 148 | dest[1] = 0xff & (n >> 010); |
| 149 | } |
| 150 | |
| 151 | static void copy_le32(unsigned char *dest, unsigned int n) |
| 152 | { |
| 153 | dest[0] = 0xff & n; |
| 154 | dest[1] = 0xff & (n >> 010); |
| 155 | dest[2] = 0xff & (n >> 020); |
| 156 | dest[3] = 0xff & (n >> 030); |
| 157 | } |
| 158 | |
| 159 | static void copy_le64(unsigned char *dest, uint64_t n) |
| 160 | { |
| 161 | dest[0] = 0xff & n; |
| 162 | dest[1] = 0xff & (n >> 010); |
| 163 | dest[2] = 0xff & (n >> 020); |
| 164 | dest[3] = 0xff & (n >> 030); |
| 165 | dest[4] = 0xff & (n >> 040); |
| 166 | dest[5] = 0xff & (n >> 050); |
| 167 | dest[6] = 0xff & (n >> 060); |
| 168 | dest[7] = 0xff & (n >> 070); |
| 169 | } |
| 170 | |
| 171 | static uint64_t clamp_max(uint64_t n, uint64_t max, int *clamped) |
| 172 | { |
| 173 | if (n <= max) |
| 174 | return n; |
| 175 | *clamped = 1; |
| 176 | return max; |
| 177 | } |
| 178 | |
| 179 | static void copy_le16_clamp(unsigned char *dest, uint64_t n, int *clamped) |
| 180 | { |
| 181 | copy_le16(dest, clamp_max(n, 0xffff, clamped)); |
| 182 | } |
| 183 | |
| 184 | static void copy_le32_clamp(unsigned char *dest, uint64_t n, int *clamped) |
| 185 | { |
| 186 | copy_le32(dest, clamp_max(n, 0xffffffff, clamped)); |
| 187 | } |
| 188 | |
| 189 | static int strbuf_add_le(struct strbuf *sb, size_t size, uintmax_t n) |
| 190 | { |
| 191 | while (size-- > 0) { |
| 192 | strbuf_addch(sb, n & 0xff); |
| 193 | n >>= 8; |
| 194 | } |
| 195 | return -!!n; |
| 196 | } |
| 197 | |
| 198 | static uint32_t clamp32(uintmax_t n) |
| 199 | { |
| 200 | const uintmax_t max = 0xffffffff; |
| 201 | return (n < max) ? n : max; |
| 202 | } |
| 203 | |
| 204 | static void *zlib_deflate_raw(void *data, unsigned long size, |
| 205 | int compression_level, |
| 206 | unsigned long *compressed_size) |
| 207 | { |
| 208 | git_zstream stream; |
| 209 | size_t maxsize; |
| 210 | void *buffer; |
| 211 | int result; |
| 212 | |
| 213 | git_deflate_init_raw(&stream, compression_level); |
| 214 | maxsize = git_deflate_bound(&stream, size); |
| 215 | buffer = xmalloc(maxsize); |
| 216 | |
| 217 | stream.next_in = data; |
| 218 | stream.avail_in = size; |
| 219 | stream.next_out = buffer; |
| 220 | stream.avail_out = maxsize; |
| 221 | |
| 222 | do { |
| 223 | result = git_deflate(&stream, Z_FINISH); |
| 224 | } while (result == Z_OK); |
| 225 | |
| 226 | if (result != Z_STREAM_END) { |
| 227 | free(buffer); |
| 228 | return NULL; |
| 229 | } |
| 230 | |
| 231 | git_deflate_end(&stream); |
| 232 | *compressed_size = stream.total_out; |
| 233 | |
| 234 | return buffer; |
| 235 | } |
| 236 | |
| 237 | static void write_zip_data_desc(unsigned long size, |
| 238 | unsigned long compressed_size, |
| 239 | unsigned long crc) |
| 240 | { |
| 241 | if (size >= 0xffffffff || compressed_size >= 0xffffffff) { |
| 242 | struct zip64_data_desc trailer; |
| 243 | copy_le32(trailer.magic, 0x08074b50); |
| 244 | copy_le32(trailer.crc32, crc); |
| 245 | copy_le64(trailer.compressed_size, compressed_size); |
| 246 | copy_le64(trailer.size, size); |
| 247 | write_or_die(1, &trailer, ZIP64_DATA_DESC_SIZE); |
| 248 | zip_offset += ZIP64_DATA_DESC_SIZE; |
| 249 | } else { |
| 250 | struct zip_data_desc trailer; |
| 251 | copy_le32(trailer.magic, 0x08074b50); |
| 252 | copy_le32(trailer.crc32, crc); |
| 253 | copy_le32(trailer.compressed_size, compressed_size); |
| 254 | copy_le32(trailer.size, size); |
| 255 | write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE); |
| 256 | zip_offset += ZIP_DATA_DESC_SIZE; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | static void set_zip_header_data_desc(struct zip_local_header *header, |
| 261 | unsigned long size, |
| 262 | unsigned long compressed_size, |
| 263 | unsigned long crc) |
| 264 | { |
| 265 | copy_le32(header->crc32, crc); |
| 266 | copy_le32(header->compressed_size, compressed_size); |
| 267 | copy_le32(header->size, size); |
| 268 | } |
| 269 | |
| 270 | static int has_only_ascii(const char *s) |
| 271 | { |
| 272 | for (;;) { |
| 273 | int c = *s++; |
| 274 | if (c == '\0') |
| 275 | return 1; |
| 276 | if (!isascii(c)) |
| 277 | return 0; |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | static int entry_is_binary(struct index_state *istate, const char *path, |
| 282 | const void *buffer, size_t size) |
| 283 | { |
| 284 | struct userdiff_driver *driver = userdiff_find_by_path(istate, path); |
| 285 | if (!driver) |
| 286 | driver = userdiff_find_by_name("default"); |
| 287 | if (driver->binary != -1) |
| 288 | return driver->binary; |
| 289 | return buffer_is_binary(buffer, size); |
| 290 | } |
| 291 | |
| 292 | #define STREAM_BUFFER_SIZE (1024 * 16) |
| 293 | |
| 294 | static int write_zip_entry(struct archiver_args *args, |
| 295 | const struct object_id *oid, |
| 296 | const char *path, size_t pathlen, |
| 297 | unsigned int mode, |
| 298 | void *buffer, unsigned long size) |
| 299 | { |
| 300 | struct zip_local_header header; |
| 301 | uintmax_t offset = zip_offset; |
| 302 | struct zip_extra_mtime extra; |
| 303 | struct zip64_extra extra64; |
| 304 | size_t header_extra_size = ZIP_EXTRA_MTIME_SIZE; |
| 305 | int need_zip64_extra = 0; |
| 306 | unsigned long attr2; |
| 307 | unsigned long compressed_size; |
| 308 | unsigned long crc; |
| 309 | enum zip_method method; |
| 310 | unsigned char *out; |
| 311 | void *deflated = NULL; |
| 312 | struct odb_read_stream *stream = NULL; |
| 313 | unsigned long flags = 0; |
| 314 | int is_binary = -1; |
| 315 | const char *path_without_prefix = path + args->baselen; |
| 316 | unsigned int creator_version = 0; |
| 317 | unsigned int version_needed = 10; |
| 318 | size_t zip_dir_extra_size = ZIP_EXTRA_MTIME_SIZE; |
| 319 | size_t zip64_dir_extra_payload_size = 0; |
| 320 | |
| 321 | crc = crc32(0, NULL, 0); |
| 322 | |
| 323 | if (!has_only_ascii(path)) { |
| 324 | if (is_utf8(path)) |
| 325 | flags |= ZIP_UTF8; |
| 326 | else |
| 327 | warning(_("path is not valid UTF-8: %s"), path); |
| 328 | } |
| 329 | |
| 330 | if (pathlen > 0xffff) { |
| 331 | return error(_("path too long (%d chars, SHA1: %s): %s"), |
| 332 | (int)pathlen, oid_to_hex(oid), path); |
| 333 | } |
| 334 | |
| 335 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { |
| 336 | method = ZIP_METHOD_STORE; |
| 337 | attr2 = 16; |
| 338 | out = NULL; |
| 339 | compressed_size = 0; |
| 340 | } else if (S_ISREG(mode) || S_ISLNK(mode)) { |
| 341 | method = ZIP_METHOD_STORE; |
| 342 | attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) : |
| 343 | (mode & 0111) ? ((mode) << 16) : 0; |
| 344 | if (S_ISLNK(mode) || (mode & 0111)) |
| 345 | creator_version = 0x0317; |
| 346 | if (S_ISREG(mode) && args->compression_level != 0 && size > 0) |
| 347 | method = ZIP_METHOD_DEFLATE; |
| 348 | |
| 349 | if (!buffer) { |
| 350 | stream = odb_read_stream_open(args->repo->objects, oid, NULL); |
| 351 | if (!stream) |
| 352 | return error(_("cannot stream blob %s"), |
| 353 | oid_to_hex(oid)); |
| 354 | size = stream->size; |
| 355 | flags |= ZIP_STREAM; |
| 356 | out = NULL; |
| 357 | } else { |
| 358 | crc = crc32(crc, buffer, size); |
| 359 | is_binary = entry_is_binary(args->repo->index, |
| 360 | path_without_prefix, |
| 361 | buffer, size); |
| 362 | out = buffer; |
| 363 | } |
| 364 | compressed_size = (method == ZIP_METHOD_STORE) ? size : 0; |
| 365 | } else { |
| 366 | return error(_("unsupported file mode: 0%o (SHA1: %s)"), mode, |
| 367 | oid_to_hex(oid)); |
| 368 | } |
| 369 | |
| 370 | if (creator_version > max_creator_version) |
| 371 | max_creator_version = creator_version; |
| 372 | |
| 373 | if (buffer && method == ZIP_METHOD_DEFLATE) { |
| 374 | out = deflated = zlib_deflate_raw(buffer, size, |
| 375 | args->compression_level, |
| 376 | &compressed_size); |
| 377 | if (!out || compressed_size >= size) { |
| 378 | out = buffer; |
| 379 | method = ZIP_METHOD_STORE; |
| 380 | compressed_size = size; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | copy_le16(extra.magic, 0x5455); |
| 385 | copy_le16(extra.extra_size, ZIP_EXTRA_MTIME_PAYLOAD_SIZE); |
| 386 | extra.flags[0] = 1; /* just mtime */ |
| 387 | copy_le32(extra.mtime, args->time); |
| 388 | |
| 389 | if (size > 0xffffffff || compressed_size > 0xffffffff) |
| 390 | need_zip64_extra = 1; |
| 391 | if (stream && size > 0x7fffffff) |
| 392 | need_zip64_extra = 1; |
| 393 | |
| 394 | if (need_zip64_extra) |
| 395 | version_needed = 45; |
| 396 | |
| 397 | copy_le32(header.magic, 0x04034b50); |
| 398 | copy_le16(header.version, version_needed); |
| 399 | copy_le16(header.flags, flags); |
| 400 | copy_le16(header.compression_method, method); |
| 401 | copy_le16(header.mtime, zip_time); |
| 402 | copy_le16(header.mdate, zip_date); |
| 403 | if (need_zip64_extra) { |
| 404 | set_zip_header_data_desc(&header, 0xffffffff, 0xffffffff, crc); |
| 405 | header_extra_size += ZIP64_EXTRA_SIZE; |
| 406 | } else { |
| 407 | set_zip_header_data_desc(&header, size, compressed_size, crc); |
| 408 | } |
| 409 | copy_le16(header.filename_length, pathlen); |
| 410 | copy_le16(header.extra_length, header_extra_size); |
| 411 | write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE); |
| 412 | zip_offset += ZIP_LOCAL_HEADER_SIZE; |
| 413 | write_or_die(1, path, pathlen); |
| 414 | zip_offset += pathlen; |
| 415 | write_or_die(1, &extra, ZIP_EXTRA_MTIME_SIZE); |
| 416 | zip_offset += ZIP_EXTRA_MTIME_SIZE; |
| 417 | if (need_zip64_extra) { |
| 418 | copy_le16(extra64.magic, 0x0001); |
| 419 | copy_le16(extra64.extra_size, ZIP64_EXTRA_PAYLOAD_SIZE); |
| 420 | copy_le64(extra64.size, size); |
| 421 | copy_le64(extra64.compressed_size, compressed_size); |
| 422 | write_or_die(1, &extra64, ZIP64_EXTRA_SIZE); |
| 423 | zip_offset += ZIP64_EXTRA_SIZE; |
| 424 | } |
| 425 | |
| 426 | if (stream && method == ZIP_METHOD_STORE) { |
| 427 | unsigned char buf[STREAM_BUFFER_SIZE]; |
| 428 | ssize_t readlen; |
| 429 | |
| 430 | for (;;) { |
| 431 | readlen = odb_read_stream_read(stream, buf, sizeof(buf)); |
| 432 | if (readlen <= 0) |
| 433 | break; |
| 434 | crc = crc32(crc, buf, readlen); |
| 435 | if (is_binary == -1) |
| 436 | is_binary = entry_is_binary(args->repo->index, |
| 437 | path_without_prefix, |
| 438 | buf, readlen); |
| 439 | write_or_die(1, buf, readlen); |
| 440 | } |
| 441 | odb_read_stream_close(stream); |
| 442 | if (readlen) |
| 443 | return readlen; |
| 444 | |
| 445 | compressed_size = size; |
| 446 | zip_offset += compressed_size; |
| 447 | |
| 448 | write_zip_data_desc(size, compressed_size, crc); |
| 449 | } else if (stream && method == ZIP_METHOD_DEFLATE) { |
| 450 | unsigned char buf[STREAM_BUFFER_SIZE]; |
| 451 | ssize_t readlen; |
| 452 | git_zstream zstream; |
| 453 | int result; |
| 454 | size_t out_len; |
| 455 | unsigned char compressed[STREAM_BUFFER_SIZE * 2]; |
| 456 | |
| 457 | git_deflate_init_raw(&zstream, args->compression_level); |
| 458 | |
| 459 | compressed_size = 0; |
| 460 | zstream.next_out = compressed; |
| 461 | zstream.avail_out = sizeof(compressed); |
| 462 | |
| 463 | for (;;) { |
| 464 | readlen = odb_read_stream_read(stream, buf, sizeof(buf)); |
| 465 | if (readlen <= 0) |
| 466 | break; |
| 467 | crc = crc32(crc, buf, readlen); |
| 468 | if (is_binary == -1) |
| 469 | is_binary = entry_is_binary(args->repo->index, |
| 470 | path_without_prefix, |
| 471 | buf, readlen); |
| 472 | |
| 473 | zstream.next_in = buf; |
| 474 | zstream.avail_in = readlen; |
| 475 | result = git_deflate(&zstream, 0); |
| 476 | if (result != Z_OK) |
| 477 | die(_("deflate error (%d)"), result); |
| 478 | out_len = zstream.next_out - compressed; |
| 479 | |
| 480 | if (out_len > 0) { |
| 481 | write_or_die(1, compressed, out_len); |
| 482 | compressed_size += out_len; |
| 483 | zstream.next_out = compressed; |
| 484 | zstream.avail_out = sizeof(compressed); |
| 485 | } |
| 486 | |
| 487 | } |
| 488 | odb_read_stream_close(stream); |
| 489 | if (readlen) |
| 490 | return readlen; |
| 491 | |
| 492 | zstream.next_in = buf; |
| 493 | zstream.avail_in = 0; |
| 494 | |
| 495 | do { |
| 496 | result = git_deflate(&zstream, Z_FINISH); |
| 497 | if (result != Z_OK && result != Z_STREAM_END) |
| 498 | die("deflate error (%d)", result); |
| 499 | |
| 500 | out_len = zstream.next_out - compressed; |
| 501 | if (out_len > 0) { |
| 502 | write_or_die(1, compressed, out_len); |
| 503 | compressed_size += out_len; |
| 504 | zstream.next_out = compressed; |
| 505 | zstream.avail_out = sizeof(compressed); |
| 506 | } |
| 507 | } while (result != Z_STREAM_END); |
| 508 | |
| 509 | git_deflate_end(&zstream); |
| 510 | zip_offset += compressed_size; |
| 511 | |
| 512 | write_zip_data_desc(size, compressed_size, crc); |
| 513 | } else if (compressed_size > 0) { |
| 514 | write_or_die(1, out, compressed_size); |
| 515 | zip_offset += compressed_size; |
| 516 | } |
| 517 | |
| 518 | free(deflated); |
| 519 | |
| 520 | if (compressed_size > 0xffffffff || size > 0xffffffff || |
| 521 | offset > 0xffffffff) { |
| 522 | if (compressed_size >= 0xffffffff) |
| 523 | zip64_dir_extra_payload_size += 8; |
| 524 | if (size >= 0xffffffff) |
| 525 | zip64_dir_extra_payload_size += 8; |
| 526 | if (offset >= 0xffffffff) |
| 527 | zip64_dir_extra_payload_size += 8; |
| 528 | zip_dir_extra_size += 2 + 2 + zip64_dir_extra_payload_size; |
| 529 | } |
| 530 | |
| 531 | strbuf_add_le(&zip_dir, 4, 0x02014b50); /* magic */ |
| 532 | strbuf_add_le(&zip_dir, 2, creator_version); |
| 533 | strbuf_add_le(&zip_dir, 2, version_needed); |
| 534 | strbuf_add_le(&zip_dir, 2, flags); |
| 535 | strbuf_add_le(&zip_dir, 2, method); |
| 536 | strbuf_add_le(&zip_dir, 2, zip_time); |
| 537 | strbuf_add_le(&zip_dir, 2, zip_date); |
| 538 | strbuf_add_le(&zip_dir, 4, crc); |
| 539 | strbuf_add_le(&zip_dir, 4, clamp32(compressed_size)); |
| 540 | strbuf_add_le(&zip_dir, 4, clamp32(size)); |
| 541 | strbuf_add_le(&zip_dir, 2, pathlen); |
| 542 | strbuf_add_le(&zip_dir, 2, zip_dir_extra_size); |
| 543 | strbuf_add_le(&zip_dir, 2, 0); /* comment length */ |
| 544 | strbuf_add_le(&zip_dir, 2, 0); /* disk */ |
| 545 | strbuf_add_le(&zip_dir, 2, !is_binary); |
| 546 | strbuf_add_le(&zip_dir, 4, attr2); |
| 547 | strbuf_add_le(&zip_dir, 4, clamp32(offset)); |
| 548 | strbuf_add(&zip_dir, path, pathlen); |
| 549 | strbuf_add(&zip_dir, &extra, ZIP_EXTRA_MTIME_SIZE); |
| 550 | if (zip64_dir_extra_payload_size) { |
| 551 | strbuf_add_le(&zip_dir, 2, 0x0001); /* magic */ |
| 552 | strbuf_add_le(&zip_dir, 2, zip64_dir_extra_payload_size); |
| 553 | if (size >= 0xffffffff) |
| 554 | strbuf_add_le(&zip_dir, 8, size); |
| 555 | if (compressed_size >= 0xffffffff) |
| 556 | strbuf_add_le(&zip_dir, 8, compressed_size); |
| 557 | if (offset >= 0xffffffff) |
| 558 | strbuf_add_le(&zip_dir, 8, offset); |
| 559 | } |
| 560 | zip_dir_entries++; |
| 561 | |
| 562 | return 0; |
| 563 | } |
| 564 | |
| 565 | static void write_zip64_trailer(void) |
| 566 | { |
| 567 | struct zip64_dir_trailer trailer64; |
| 568 | struct zip64_dir_trailer_locator locator64; |
| 569 | |
| 570 | copy_le32(trailer64.magic, 0x06064b50); |
| 571 | copy_le64(trailer64.record_size, ZIP64_DIR_TRAILER_RECORD_SIZE); |
| 572 | copy_le16(trailer64.creator_version, max_creator_version); |
| 573 | copy_le16(trailer64.version, 45); |
| 574 | copy_le32(trailer64.disk, 0); |
| 575 | copy_le32(trailer64.directory_start_disk, 0); |
| 576 | copy_le64(trailer64.entries_on_this_disk, zip_dir_entries); |
| 577 | copy_le64(trailer64.entries, zip_dir_entries); |
| 578 | copy_le64(trailer64.size, zip_dir.len); |
| 579 | copy_le64(trailer64.offset, zip_offset); |
| 580 | |
| 581 | copy_le32(locator64.magic, 0x07064b50); |
| 582 | copy_le32(locator64.disk, 0); |
| 583 | copy_le64(locator64.offset, zip_offset + zip_dir.len); |
| 584 | copy_le32(locator64.number_of_disks, 1); |
| 585 | |
| 586 | write_or_die(1, &trailer64, ZIP64_DIR_TRAILER_SIZE); |
| 587 | write_or_die(1, &locator64, ZIP64_DIR_TRAILER_LOCATOR_SIZE); |
| 588 | } |
| 589 | |
| 590 | static void write_zip_trailer(const struct object_id *oid) |
| 591 | { |
| 592 | struct zip_dir_trailer trailer; |
| 593 | int clamped = 0; |
| 594 | |
| 595 | copy_le32(trailer.magic, 0x06054b50); |
| 596 | copy_le16(trailer.disk, 0); |
| 597 | copy_le16(trailer.directory_start_disk, 0); |
| 598 | copy_le16_clamp(trailer.entries_on_this_disk, zip_dir_entries, |
| 599 | &clamped); |
| 600 | copy_le16_clamp(trailer.entries, zip_dir_entries, &clamped); |
| 601 | copy_le32(trailer.size, zip_dir.len); |
| 602 | copy_le32_clamp(trailer.offset, zip_offset, &clamped); |
| 603 | copy_le16(trailer.comment_length, oid ? the_hash_algo->hexsz : 0); |
| 604 | |
| 605 | write_or_die(1, zip_dir.buf, zip_dir.len); |
| 606 | if (clamped) |
| 607 | write_zip64_trailer(); |
| 608 | write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE); |
| 609 | if (oid) |
| 610 | write_or_die(1, oid_to_hex(oid), the_hash_algo->hexsz); |
| 611 | } |
| 612 | |
| 613 | static void dos_time(timestamp_t *timestamp, int *dos_date, int *dos_time) |
| 614 | { |
| 615 | time_t time; |
| 616 | struct tm tm; |
| 617 | |
| 618 | if (date_overflows(*timestamp)) |
| 619 | die(_("timestamp too large for this system: %"PRItime), |
| 620 | *timestamp); |
| 621 | time = (time_t)*timestamp; |
| 622 | localtime_r(&time, &tm); |
| 623 | *timestamp = time; |
| 624 | |
| 625 | *dos_date = tm.tm_mday + (tm.tm_mon + 1) * 32 + |
| 626 | (tm.tm_year + 1900 - 1980) * 512; |
| 627 | *dos_time = tm.tm_sec / 2 + tm.tm_min * 32 + tm.tm_hour * 2048; |
| 628 | } |
| 629 | |
| 630 | static int archive_zip_config(const char *var, const char *value, |
| 631 | const struct config_context *ctx UNUSED, |
| 632 | void *data UNUSED) |
| 633 | { |
| 634 | return userdiff_config(var, value); |
| 635 | } |
| 636 | |
| 637 | static int write_zip_archive(const struct archiver *ar UNUSED, |
| 638 | struct archiver_args *args) |
| 639 | { |
| 640 | int err; |
| 641 | |
| 642 | repo_config(the_repository, archive_zip_config, NULL); |
| 643 | |
| 644 | dos_time(&args->time, &zip_date, &zip_time); |
| 645 | |
| 646 | strbuf_init(&zip_dir, 0); |
| 647 | |
| 648 | err = write_archive_entries(args, write_zip_entry); |
| 649 | if (!err) |
| 650 | write_zip_trailer(args->commit_oid); |
| 651 | |
| 652 | strbuf_release(&zip_dir); |
| 653 | |
| 654 | return err; |
| 655 | } |
| 656 | |
| 657 | static struct archiver zip_archiver = { |
| 658 | .name = "zip", |
| 659 | .write_archive = write_zip_archive, |
| 660 | .flags = ARCHIVER_WANT_COMPRESSION_LEVELS|ARCHIVER_REMOTE, |
| 661 | }; |
| 662 | |
| 663 | void init_zip_archiver(void) |
| 664 | { |
| 665 | register_archiver(&zip_archiver); |
| 666 | } |