1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2003-2007 Tim Kientzle 5 * Copyright (c) 2012 Michihiro NAKAJIMA 6 * All rights reserved. 7 */ 8 9 #include "bsdtar_platform.h" 10 11 #ifdef HAVE_SYS_TYPES_H 12 #include <sys/types.h> 13 #endif 14 #ifdef HAVE_SYS_STAT_H 15 #include <sys/stat.h> 16 #endif 17 #if HAVE_SYS_XATTR_H 18 #include <sys/xattr.h> 19 #elif HAVE_ATTR_XATTR_H 20 #include <attr/xattr.h> 21 #endif 22 #ifdef HAVE_ERRNO_H 23 #include <errno.h> 24 #endif 25 #ifdef HAVE_FCNTL_H 26 #include <fcntl.h> 27 #endif 28 #ifdef HAVE_GRP_H 29 #include <grp.h> 30 #endif 31 #ifdef HAVE_IO_H 32 #include <io.h> 33 #endif 34 #ifdef HAVE_LIBGEN_H 35 #include <libgen.h> 36 #endif 37 #ifdef HAVE_LIMITS_H 38 #include <limits.h> 39 #endif 40 #ifdef HAVE_PATHS_H 41 #include <paths.h> 42 #endif 43 #ifdef HAVE_PWD_H 44 #include <pwd.h> 45 #endif 46 #ifdef HAVE_STDINT_H 47 #include <stdint.h> 48 #endif 49 #include <stdio.h> 50 #ifdef HAVE_STDLIB_H 51 #include <stdlib.h> 52 #endif 53 #ifdef HAVE_STRING_H 54 #include <string.h> 55 #endif 56 #ifdef HAVE_UNISTD_H 57 #include <unistd.h> 58 #endif 59 60 #include "bsdtar.h" 61 #include "lafe_err.h" 62 #include "line_reader.h" 63 64 #ifndef O_BINARY 65 #define O_BINARY 0 66 #endif 67 68 struct archive_dir_entry { 69 struct archive_dir_entry *next; 70 time_t mtime_sec; 71 int mtime_nsec; 72 char *name; 73 }; 74 75 struct archive_dir { 76 struct archive_dir_entry *head, *tail; 77 }; 78 79 static int append_archive(struct bsdtar *, struct archive *, 80 struct archive *ina); 81 static int append_archive_filename(struct bsdtar *, 82 struct archive *, const char *fname); 83 static void archive_names_from_file(struct bsdtar *bsdtar, 84 struct archive *a); 85 static int copy_file_data_block(struct bsdtar *, 86 struct archive *a, struct archive *, 87 struct archive_entry *); 88 static void excluded_callback(struct archive *, void *, 89 struct archive_entry *); 90 static void report_write(struct bsdtar *, struct archive *, 91 struct archive_entry *, int64_t progress); 92 static void test_for_append(struct bsdtar *); 93 static int metadata_filter(struct archive *, void *, 94 struct archive_entry *); 95 static void write_archive(struct archive *, struct bsdtar *); 96 static void write_entry(struct bsdtar *, struct archive *, 97 struct archive_entry *); 98 static void write_file(struct bsdtar *, struct archive *, 99 struct archive_entry *); 100 static void write_hierarchy(struct bsdtar *, struct archive *, 101 const char *); 102 103 #if defined(_WIN32) && !defined(__CYGWIN__) 104 /* Not a full lseek() emulation, but enough for our needs here. */ 105 static int 106 seek_file(int fd, int64_t offset, int whence) 107 { 108 LARGE_INTEGER distance; 109 (void)whence; /* UNUSED */ 110 distance.QuadPart = offset; 111 return (SetFilePointerEx((HANDLE)_get_osfhandle(fd), 112 distance, NULL, FILE_BEGIN) ? 1 : -1); 113 } 114 115 static int 116 _open_wrap_sopen(char const *const path, int const oflag, ...) 117 { 118 va_list ap; 119 int r, pmode; 120 121 pmode = 0; 122 if (oflag & _O_CREAT) 123 { 124 va_start(ap, oflag); 125 pmode = va_arg(ap, int); 126 va_end(ap); 127 } 128 129 _sopen_s(&r, path, oflag, _SH_DENYNO, pmode & 0600); 130 if (r < 0) 131 { 132 /* _sopen_s populates errno */ 133 return -1; 134 } 135 136 return r; 137 } 138 139 #define open _open_wrap_sopen 140 #define close _close 141 #define read _read 142 #ifdef lseek 143 #undef lseek 144 #endif 145 #define lseek seek_file 146 #endif 147 148 static void 149 set_writer_options(struct bsdtar *bsdtar, struct archive *a) 150 { 151 const char *writer_options; 152 int r; 153 154 writer_options = getenv(ENV_WRITER_OPTIONS); 155 if (writer_options != NULL) { 156 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; 157 size_t opt_len = strlen(writer_options) + 1; 158 char *p; 159 /* Set default write options. */ 160 if ((p = malloc(module_len + opt_len)) == NULL) 161 lafe_errc(1, errno, "Out of memory"); 162 /* Prepend magic code to ignore options for 163 * a format or filters which are not added to 164 * the archive write object. */ 165 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); 166 memcpy(p + module_len, writer_options, opt_len); 167 r = archive_write_set_options(a, p); 168 free(p); 169 if (r < ARCHIVE_WARN) 170 lafe_errc(1, 0, "%s", archive_error_string(a)); 171 else 172 archive_clear_error(a); 173 } 174 if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) 175 lafe_errc(1, 0, "%s", archive_error_string(a)); 176 } 177 178 static void 179 set_reader_options(struct bsdtar *bsdtar, struct archive *a) 180 { 181 const char *reader_options; 182 int r; 183 184 (void)bsdtar; /* UNUSED */ 185 186 reader_options = getenv(ENV_READER_OPTIONS); 187 if (reader_options != NULL) { 188 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; 189 size_t opt_len = strlen(reader_options) + 1; 190 char *p; 191 /* Set default write options. */ 192 if ((p = malloc(module_len + opt_len)) == NULL) 193 lafe_errc(1, errno, "Out of memory"); 194 /* Prepend magic code to ignore options for 195 * a format or filters which are not added to 196 * the archive write object. */ 197 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); 198 memcpy(p + module_len, reader_options, opt_len); 199 r = archive_read_set_options(a, p); 200 free(p); 201 if (r < ARCHIVE_WARN) 202 lafe_errc(1, 0, "%s", archive_error_string(a)); 203 else 204 archive_clear_error(a); 205 } 206 if (bsdtar->flags & OPTFLAG_IGNORE_ZEROS) 207 if (archive_read_set_options(a, 208 "read_concatenated_archives") != ARCHIVE_OK) 209 lafe_errc(1, 0, "%s", archive_error_string(a)); 210 } 211 212 void 213 tar_mode_c(struct bsdtar *bsdtar) 214 { 215 struct archive *a; 216 const void *filter_name; 217 int r; 218 219 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) 220 lafe_errc(1, 0, "no files or directories specified"); 221 222 a = archive_write_new(); 223 224 /* Support any format that the library supports. */ 225 if (cset_get_format(bsdtar->cset) == NULL) { 226 r = archive_write_set_format_pax_restricted(a); 227 cset_set_format(bsdtar->cset, "pax restricted"); 228 } else { 229 r = archive_write_set_format_by_name(a, 230 cset_get_format(bsdtar->cset)); 231 } 232 if (r != ARCHIVE_OK) { 233 fprintf(stderr, "Can't use format %s: %s\n", 234 cset_get_format(bsdtar->cset), 235 archive_error_string(a)); 236 usage(); 237 } 238 239 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); 240 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block); 241 242 r = cset_write_add_filters(bsdtar->cset, a, &filter_name); 243 if (r < ARCHIVE_WARN) { 244 lafe_errc(1, 0, "Unsupported compression option --%s", 245 (const char *)filter_name); 246 } 247 248 set_writer_options(bsdtar, a); 249 if (bsdtar->passphrase != NULL) 250 r = archive_write_set_passphrase(a, bsdtar->passphrase); 251 else 252 r = archive_write_set_passphrase_callback(a, bsdtar, 253 &passphrase_callback); 254 if (r != ARCHIVE_OK) 255 lafe_errc(1, 0, "%s", archive_error_string(a)); 256 if (ARCHIVE_OK != archive_write_open_filename(a, bsdtar->filename)) 257 lafe_errc(1, 0, "%s", archive_error_string(a)); 258 write_archive(a, bsdtar); 259 } 260 261 /* 262 * Same as 'c', except we only support tar or empty formats in 263 * uncompressed files on disk. 264 */ 265 void 266 tar_mode_r(struct bsdtar *bsdtar) 267 { 268 int64_t end_offset; 269 int format; 270 struct archive *a; 271 struct archive_entry *entry; 272 int r; 273 274 /* Sanity-test some arguments and the file. */ 275 test_for_append(bsdtar); 276 277 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 278 279 #if defined(__BORLANDC__) 280 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY); 281 #else 282 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY, 0666); 283 #endif 284 if (bsdtar->fd < 0) 285 lafe_errc(1, errno, 286 "Cannot open %s", bsdtar->filename); 287 288 a = archive_read_new(); 289 archive_read_support_filter_all(a); 290 archive_read_support_format_empty(a); 291 archive_read_support_format_tar(a); 292 archive_read_support_format_gnutar(a); 293 set_reader_options(bsdtar, a); 294 r = archive_read_open_fd(a, bsdtar->fd, 10240); 295 if (r != ARCHIVE_OK) 296 lafe_errc(1, archive_errno(a), 297 "Can't read archive %s: %s", bsdtar->filename, 298 archive_error_string(a)); 299 while (0 == archive_read_next_header(a, &entry)) { 300 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) { 301 archive_read_free(a); 302 close(bsdtar->fd); 303 lafe_errc(1, 0, 304 "Cannot append to compressed archive"); 305 } 306 /* Keep going until we hit end-of-archive */ 307 format = archive_format(a); 308 } 309 310 end_offset = archive_read_header_position(a); 311 archive_read_free(a); 312 313 /* Re-open archive for writing */ 314 a = archive_write_new(); 315 /* 316 * Set the format to be used for writing. To allow people to 317 * extend empty files, we need to allow them to specify the format, 318 * which opens the possibility that they will specify a format that 319 * doesn't match the existing format. Hence, the following bit 320 * of arcane ugliness. 321 */ 322 323 if (cset_get_format(bsdtar->cset) != NULL) { 324 /* If the user requested a format, use that, but ... */ 325 archive_write_set_format_by_name(a, 326 cset_get_format(bsdtar->cset)); 327 /* ... complain if it's not compatible. */ 328 format &= ARCHIVE_FORMAT_BASE_MASK; 329 if (format != (int)(archive_format(a) & ARCHIVE_FORMAT_BASE_MASK) 330 && format != ARCHIVE_FORMAT_EMPTY) { 331 lafe_errc(1, 0, 332 "Format %s is incompatible with the archive %s", 333 cset_get_format(bsdtar->cset), bsdtar->filename); 334 } 335 } else { 336 /* 337 * Just preserve the current format, with a little care 338 * for formats that libarchive can't write. 339 */ 340 if (format == ARCHIVE_FORMAT_EMPTY) 341 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 342 archive_write_set_format(a, format); 343 } 344 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0) 345 lafe_errc(1, errno, "Could not seek to archive end"); 346 set_writer_options(bsdtar, a); 347 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) 348 lafe_errc(1, 0, "%s", archive_error_string(a)); 349 350 write_archive(a, bsdtar); /* XXX check return val XXX */ 351 352 close(bsdtar->fd); 353 bsdtar->fd = -1; 354 } 355 356 void 357 tar_mode_u(struct bsdtar *bsdtar) 358 { 359 int64_t end_offset; 360 struct archive *a; 361 struct archive_entry *entry; 362 int format; 363 struct archive_dir_entry *p; 364 struct archive_dir archive_dir; 365 366 bsdtar->archive_dir = &archive_dir; 367 memset(&archive_dir, 0, sizeof(archive_dir)); 368 369 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 370 371 /* Sanity-test some arguments and the file. */ 372 test_for_append(bsdtar); 373 374 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_BINARY); 375 if (bsdtar->fd < 0) 376 lafe_errc(1, errno, 377 "Cannot open %s", bsdtar->filename); 378 379 a = archive_read_new(); 380 archive_read_support_filter_all(a); 381 archive_read_support_format_tar(a); 382 archive_read_support_format_gnutar(a); 383 set_reader_options(bsdtar, a); 384 if (archive_read_open_fd(a, bsdtar->fd, bsdtar->bytes_per_block) 385 != ARCHIVE_OK) { 386 lafe_errc(1, 0, 387 "Can't open %s: %s", bsdtar->filename, 388 archive_error_string(a)); 389 } 390 391 /* Build a list of all entries and their recorded mod times. */ 392 while (0 == archive_read_next_header(a, &entry)) { 393 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) { 394 archive_read_free(a); 395 close(bsdtar->fd); 396 lafe_errc(1, 0, 397 "Cannot append to compressed archive"); 398 } 399 if (archive_match_exclude_entry(bsdtar->matching, 400 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER | 401 ARCHIVE_MATCH_EQUAL, entry) != ARCHIVE_OK) 402 lafe_errc(1, 0, "%s", 403 archive_error_string(bsdtar->matching)); 404 /* Record the last format determination we see */ 405 format = archive_format(a); 406 /* Keep going until we hit end-of-archive */ 407 } 408 409 end_offset = archive_read_header_position(a); 410 archive_read_free(a); 411 412 /* Re-open archive for writing. */ 413 a = archive_write_new(); 414 /* 415 * Set format to same one auto-detected above. 416 */ 417 archive_write_set_format(a, format); 418 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); 419 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block); 420 421 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0) 422 lafe_errc(1, errno, "Could not seek to archive end"); 423 set_writer_options(bsdtar, a); 424 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) 425 lafe_errc(1, 0, "%s", archive_error_string(a)); 426 427 write_archive(a, bsdtar); 428 429 close(bsdtar->fd); 430 bsdtar->fd = -1; 431 432 while (bsdtar->archive_dir->head != NULL) { 433 p = bsdtar->archive_dir->head->next; 434 free(bsdtar->archive_dir->head->name); 435 free(bsdtar->archive_dir->head); 436 bsdtar->archive_dir->head = p; 437 } 438 bsdtar->archive_dir->tail = NULL; 439 } 440 441 442 /* 443 * Write user-specified files/dirs to opened archive. 444 */ 445 static void 446 write_archive(struct archive *a, struct bsdtar *bsdtar) 447 { 448 const char *arg; 449 struct archive_entry *entry, *sparse_entry; 450 451 /* Choose a suitable copy buffer size */ 452 bsdtar->buff_size = 64 * 1024; 453 while (bsdtar->buff_size < (size_t)bsdtar->bytes_per_block) 454 bsdtar->buff_size *= 2; 455 /* Try to compensate for space we'll lose to alignment. */ 456 bsdtar->buff_size += 16 * 1024; 457 458 /* Allocate a buffer for file data. */ 459 if ((bsdtar->buff = malloc(bsdtar->buff_size)) == NULL) 460 lafe_errc(1, 0, "cannot allocate memory"); 461 462 if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL) 463 lafe_errc(1, 0, "cannot create link resolver"); 464 archive_entry_linkresolver_set_strategy(bsdtar->resolver, 465 archive_format(a)); 466 467 /* Create a read_disk object. */ 468 if ((bsdtar->diskreader = archive_read_disk_new()) == NULL) 469 lafe_errc(1, 0, "Cannot create read_disk object"); 470 /* Tell the read_disk how handle symlink. */ 471 switch (bsdtar->symlink_mode) { 472 case 'H': 473 archive_read_disk_set_symlink_hybrid(bsdtar->diskreader); 474 break; 475 case 'L': 476 archive_read_disk_set_symlink_logical(bsdtar->diskreader); 477 break; 478 default: 479 archive_read_disk_set_symlink_physical(bsdtar->diskreader); 480 break; 481 } 482 /* Register entry filters. */ 483 archive_read_disk_set_matching(bsdtar->diskreader, 484 bsdtar->matching, excluded_callback, bsdtar); 485 archive_read_disk_set_metadata_filter_callback( 486 bsdtar->diskreader, metadata_filter, bsdtar); 487 /* Set the behavior of archive_read_disk. */ 488 archive_read_disk_set_behavior(bsdtar->diskreader, 489 bsdtar->readdisk_flags); 490 archive_read_disk_set_standard_lookup(bsdtar->diskreader); 491 492 if (bsdtar->names_from_file != NULL) 493 archive_names_from_file(bsdtar, a); 494 495 while (*bsdtar->argv) { 496 arg = *bsdtar->argv; 497 if (arg[0] == '-' && arg[1] == 'C') { 498 arg += 2; 499 if (*arg == '\0') { 500 bsdtar->argv++; 501 arg = *bsdtar->argv; 502 if (arg == NULL) { 503 lafe_warnc(0, "%s", 504 "Missing argument for -C"); 505 bsdtar->return_value = 1; 506 goto cleanup; 507 } 508 if (*arg == '\0') { 509 lafe_warnc(0, 510 "Meaningless argument for -C: ''"); 511 bsdtar->return_value = 1; 512 goto cleanup; 513 } 514 } 515 set_chdir(bsdtar, arg); 516 } else { 517 if (*arg != '/') 518 do_chdir(bsdtar); /* Handle a deferred -C */ 519 if (*arg == '@') { 520 if (append_archive_filename(bsdtar, a, 521 arg + 1) != 0) 522 break; 523 } else 524 write_hierarchy(bsdtar, a, arg); 525 } 526 bsdtar->argv++; 527 } 528 529 archive_read_disk_set_matching(bsdtar->diskreader, NULL, NULL, NULL); 530 archive_read_disk_set_metadata_filter_callback( 531 bsdtar->diskreader, NULL, NULL); 532 entry = NULL; 533 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); 534 while (entry != NULL) { 535 int r; 536 struct archive_entry *entry2; 537 struct archive *disk = bsdtar->diskreader; 538 539 /* 540 * This tricky code here is to correctly read the contents 541 * of the entry because the disk reader bsdtar->diskreader 542 * is pointing at does not have any information about the 543 * entry by this time and using archive_read_data_block() 544 * with the disk reader consequently must fail. And we 545 * have to re-open the entry to read the contents. 546 */ 547 /* TODO: Work with -C option as well. */ 548 r = archive_read_disk_open(disk, 549 archive_entry_sourcepath(entry)); 550 if (r != ARCHIVE_OK) { 551 lafe_warnc(archive_errno(disk), 552 "%s", archive_error_string(disk)); 553 bsdtar->return_value = 1; 554 goto next_entry; 555 } 556 557 /* 558 * Invoke archive_read_next_header2() to work 559 * archive_read_data_block(), which is called via write_file(), 560 * without failure. 561 */ 562 entry2 = archive_entry_new(); 563 r = archive_read_next_header2(disk, entry2); 564 archive_entry_free(entry2); 565 if (r != ARCHIVE_OK) { 566 lafe_warnc(archive_errno(disk), 567 "%s", archive_error_string(disk)); 568 if (r == ARCHIVE_FATAL) 569 bsdtar->return_value = 1; 570 archive_read_close(disk); 571 goto next_entry; 572 } 573 574 write_file(bsdtar, a, entry); 575 archive_read_close(disk); 576 next_entry: 577 archive_entry_free(entry); 578 entry = NULL; 579 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); 580 } 581 582 if (archive_write_close(a)) { 583 lafe_warnc(0, "%s", archive_error_string(a)); 584 bsdtar->return_value = 1; 585 } 586 587 cleanup: 588 /* Free file data buffer. */ 589 free(bsdtar->buff); 590 archive_entry_linkresolver_free(bsdtar->resolver); 591 bsdtar->resolver = NULL; 592 archive_read_free(bsdtar->diskreader); 593 bsdtar->diskreader = NULL; 594 595 if (bsdtar->flags & OPTFLAG_TOTALS) { 596 fprintf(stderr, "Total bytes written: %s\n", 597 tar_i64toa(archive_filter_bytes(a, -1))); 598 } 599 600 archive_write_free(a); 601 } 602 603 /* 604 * Archive names specified in file. 605 * 606 * Unless --null was specified, a line containing exactly "-C" will 607 * cause the next line to be a directory to pass to chdir(). If 608 * --null is specified, then a line "-C" is just another filename. 609 */ 610 static void 611 archive_names_from_file(struct bsdtar *bsdtar, struct archive *a) 612 { 613 struct lafe_line_reader *lr; 614 const char *line; 615 616 bsdtar->next_line_is_dir = 0; 617 618 lr = lafe_line_reader(bsdtar->names_from_file, 619 (bsdtar->flags & OPTFLAG_NULL)); 620 while ((line = lafe_line_reader_next(lr)) != NULL) { 621 if (bsdtar->next_line_is_dir) { 622 if (*line != '\0') 623 set_chdir(bsdtar, line); 624 else { 625 lafe_warnc(0, 626 "Meaningless argument for -C: ''"); 627 bsdtar->return_value = 1; 628 } 629 bsdtar->next_line_is_dir = 0; 630 } else if (((bsdtar->flags & OPTFLAG_NULL) == 0) && 631 strcmp(line, "-C") == 0) 632 bsdtar->next_line_is_dir = 1; 633 else { 634 if (*line != '/') 635 do_chdir(bsdtar); /* Handle a deferred -C */ 636 write_hierarchy(bsdtar, a, line); 637 } 638 } 639 lafe_line_reader_free(lr); 640 if (bsdtar->next_line_is_dir) 641 lafe_errc(1, errno, 642 "Unexpected end of filename list; " 643 "directory expected after -C"); 644 } 645 646 /* 647 * Copy from specified archive to current archive. Returns non-zero 648 * for write errors (which force us to terminate the entire archiving 649 * operation). If there are errors reading the input archive, we set 650 * bsdtar->return_value but return zero, so the overall archiving 651 * operation will complete and return non-zero. 652 */ 653 static int 654 append_archive_filename(struct bsdtar *bsdtar, struct archive *a, 655 const char *raw_filename) 656 { 657 struct archive *ina; 658 const char *filename = raw_filename; 659 int rc; 660 661 if (strcmp(filename, "-") == 0) 662 filename = NULL; /* Library uses NULL for stdio. */ 663 664 ina = archive_read_new(); 665 archive_read_support_format_all(ina); 666 archive_read_support_filter_all(ina); 667 set_reader_options(bsdtar, ina); 668 archive_read_set_options(ina, "mtree:checkfs"); 669 if (bsdtar->passphrase != NULL) 670 rc = archive_read_add_passphrase(a, bsdtar->passphrase); 671 else 672 rc = archive_read_set_passphrase_callback(ina, bsdtar, 673 &passphrase_callback); 674 if (rc != ARCHIVE_OK) 675 lafe_errc(1, 0, "%s", archive_error_string(a)); 676 if (archive_read_open_filename(ina, filename, 677 bsdtar->bytes_per_block)) { 678 lafe_warnc(0, "%s", archive_error_string(ina)); 679 bsdtar->return_value = 1; 680 return (0); 681 } 682 683 rc = append_archive(bsdtar, a, ina); 684 685 if (rc != ARCHIVE_OK) { 686 lafe_warnc(0, "Error reading archive %s: %s", 687 raw_filename, archive_error_string(ina)); 688 bsdtar->return_value = 1; 689 } 690 archive_read_free(ina); 691 692 return (rc); 693 } 694 695 static int 696 append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina) 697 { 698 struct archive_entry *in_entry; 699 int e; 700 701 while (ARCHIVE_OK == (e = archive_read_next_header(ina, &in_entry))) { 702 if (archive_match_excluded(bsdtar->matching, in_entry)) 703 continue; 704 if(edit_pathname(bsdtar, in_entry)) 705 continue; 706 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 707 !yes("copy '%s'", archive_entry_pathname(in_entry))) 708 continue; 709 edit_mtime(bsdtar, in_entry); 710 if (bsdtar->verbose > 1) { 711 safe_fprintf(stderr, "a "); 712 list_item_verbose(bsdtar, stderr, in_entry); 713 } else if (bsdtar->verbose > 0) 714 safe_fprintf(stderr, "a %s", 715 archive_entry_pathname(in_entry)); 716 if (need_report()) 717 report_write(bsdtar, a, in_entry, 0); 718 719 e = archive_write_header(a, in_entry); 720 if (e != ARCHIVE_OK) { 721 if (!bsdtar->verbose) 722 lafe_warnc(0, "%s: %s", 723 archive_entry_pathname(in_entry), 724 archive_error_string(a)); 725 else 726 fprintf(stderr, ": %s", archive_error_string(a)); 727 } 728 if (e == ARCHIVE_FATAL) 729 exit(1); 730 731 if (e >= ARCHIVE_WARN) { 732 if (archive_entry_size(in_entry) == 0) 733 archive_read_data_skip(ina); 734 else if (copy_file_data_block(bsdtar, a, ina, in_entry)) 735 exit(1); 736 } 737 738 if (bsdtar->verbose) 739 fprintf(stderr, "\n"); 740 } 741 742 return (e == ARCHIVE_EOF ? ARCHIVE_OK : e); 743 } 744 745 /* Helper function to copy file to archive. */ 746 static int 747 copy_file_data_block(struct bsdtar *bsdtar, struct archive *a, 748 struct archive *in_a, struct archive_entry *entry) 749 { 750 size_t bytes_read; 751 ssize_t bytes_written; 752 int64_t offset, progress = 0; 753 char *null_buff = NULL; 754 const void *buff; 755 int r; 756 757 while ((r = archive_read_data_block(in_a, &buff, 758 &bytes_read, &offset)) == ARCHIVE_OK) { 759 if (need_report()) 760 report_write(bsdtar, a, entry, progress); 761 762 if (offset > progress) { 763 int64_t sparse = offset - progress; 764 size_t ns; 765 766 if (null_buff == NULL) { 767 null_buff = bsdtar->buff; 768 memset(null_buff, 0, bsdtar->buff_size); 769 } 770 771 while (sparse > 0) { 772 if (sparse > (int64_t)bsdtar->buff_size) 773 ns = bsdtar->buff_size; 774 else 775 ns = (size_t)sparse; 776 bytes_written = 777 archive_write_data(a, null_buff, ns); 778 if (bytes_written < 0) { 779 /* Write failed; this is bad */ 780 lafe_warnc(0, "%s", 781 archive_error_string(a)); 782 return (-1); 783 } 784 if ((size_t)bytes_written < ns) { 785 /* Write was truncated; warn but 786 * continue. */ 787 lafe_warnc(0, 788 "%s: Truncated write; file may " 789 "have grown while being archived", 790 archive_entry_pathname(entry)); 791 return (0); 792 } 793 progress += bytes_written; 794 sparse -= bytes_written; 795 } 796 } 797 798 bytes_written = archive_write_data(a, buff, bytes_read); 799 if (bytes_written < 0) { 800 /* Write failed; this is bad */ 801 lafe_warnc(0, "%s", archive_error_string(a)); 802 return (-1); 803 } 804 if ((size_t)bytes_written < bytes_read) { 805 /* Write was truncated; warn but continue. */ 806 lafe_warnc(0, 807 "%s: Truncated write; file may have grown " 808 "while being archived", 809 archive_entry_pathname(entry)); 810 return (0); 811 } 812 progress += bytes_written; 813 } 814 if (r < ARCHIVE_WARN) { 815 const char *s = archive_error_string(a); 816 if (s) 817 lafe_warnc(archive_errno(a), "%s", s); 818 return (-1); 819 } 820 return (0); 821 } 822 823 static void 824 excluded_callback(struct archive *a, void *_data, struct archive_entry *entry) 825 { 826 struct bsdtar *bsdtar = (struct bsdtar *)_data; 827 828 if (bsdtar->flags & OPTFLAG_NO_SUBDIRS) 829 return; 830 if (!archive_read_disk_can_descend(a)) 831 return; 832 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 833 !yes("add '%s'", archive_entry_pathname(entry))) 834 return; 835 archive_read_disk_descend(a); 836 } 837 838 static int 839 metadata_filter(struct archive *a, void *_data, struct archive_entry *entry) 840 { 841 struct bsdtar *bsdtar = (struct bsdtar *)_data; 842 843 /* XXX TODO: check whether this filesystem is 844 * synthetic and/or local. Add a new 845 * --local-only option to skip non-local 846 * filesystems. Skip synthetic filesystems 847 * regardless. 848 * 849 * The results should be cached, since 850 * tree.c doesn't usually visit a directory 851 * and the directory contents together. A simple 852 * move-to-front list should perform quite well. 853 * 854 * Use archive_read_disk_current_filesystem_is_remote(). 855 */ 856 857 /* 858 * If the user vetoes this file/directory, skip it. 859 * We want this to be fairly late; if some other 860 * check would veto this file, we shouldn't bother 861 * the user with it. 862 */ 863 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 864 !yes("add '%s'", archive_entry_pathname(entry))) 865 return (0); 866 867 /* Note: if user vetoes, we won't descend. */ 868 if (((bsdtar->flags & OPTFLAG_NO_SUBDIRS) == 0) && 869 archive_read_disk_can_descend(a)) 870 archive_read_disk_descend(a); 871 872 return (1); 873 } 874 875 /* 876 * Add the file or dir hierarchy named by 'path' to the archive 877 */ 878 static void 879 write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path) 880 { 881 struct archive *disk = bsdtar->diskreader; 882 struct archive_entry *entry = NULL, *spare_entry = NULL; 883 int r; 884 885 r = archive_read_disk_open(disk, path); 886 if (r != ARCHIVE_OK) { 887 lafe_warnc(archive_errno(disk), 888 "%s", archive_error_string(disk)); 889 bsdtar->return_value = 1; 890 return; 891 } 892 bsdtar->first_fs = -1; 893 894 for (;;) { 895 archive_entry_free(entry); 896 entry = archive_entry_new(); 897 r = archive_read_next_header2(disk, entry); 898 if (r == ARCHIVE_EOF) 899 break; 900 else if (r != ARCHIVE_OK) { 901 lafe_warnc(archive_errno(disk), 902 "%s", archive_error_string(disk)); 903 if (r == ARCHIVE_FATAL || r == ARCHIVE_FAILED) { 904 bsdtar->return_value = 1; 905 archive_entry_free(entry); 906 archive_read_close(disk); 907 return; 908 } else if (r < ARCHIVE_WARN) 909 continue; 910 } 911 912 if (bsdtar->uid >= 0) { 913 archive_entry_set_uid(entry, bsdtar->uid); 914 if (!bsdtar->uname) 915 archive_entry_set_uname(entry, 916 archive_read_disk_uname(bsdtar->diskreader, 917 bsdtar->uid)); 918 } 919 if (bsdtar->gid >= 0) { 920 archive_entry_set_gid(entry, bsdtar->gid); 921 if (!bsdtar->gname) 922 archive_entry_set_gname(entry, 923 archive_read_disk_gname(bsdtar->diskreader, 924 bsdtar->gid)); 925 } 926 if (bsdtar->uname) 927 archive_entry_set_uname(entry, bsdtar->uname); 928 if (bsdtar->gname) 929 archive_entry_set_gname(entry, bsdtar->gname); 930 931 /* 932 * Rewrite the pathname to be archived. If rewrite 933 * fails, skip the entry. 934 */ 935 if (edit_pathname(bsdtar, entry)) 936 continue; 937 938 /* Rewrite the mtime. */ 939 edit_mtime(bsdtar, entry); 940 941 /* Display entry as we process it. */ 942 if (bsdtar->verbose > 1) { 943 safe_fprintf(stderr, "a "); 944 list_item_verbose(bsdtar, stderr, entry); 945 } else if (bsdtar->verbose > 0) { 946 /* This format is required by SUSv2. */ 947 safe_fprintf(stderr, "a %s", 948 archive_entry_pathname(entry)); 949 } 950 951 /* Non-regular files get archived with zero size. */ 952 if (archive_entry_filetype(entry) != AE_IFREG) 953 archive_entry_set_size(entry, 0); 954 955 archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry); 956 957 while (entry != NULL) { 958 write_file(bsdtar, a, entry); 959 if (entry != spare_entry) { 960 archive_entry_free(entry); 961 } 962 entry = spare_entry; 963 spare_entry = NULL; 964 } 965 966 if (bsdtar->verbose) 967 fprintf(stderr, "\n"); 968 } 969 archive_entry_free(entry); 970 archive_read_close(disk); 971 } 972 973 /* 974 * Write a single file (or directory or other filesystem object) to 975 * the archive. 976 */ 977 static void 978 write_file(struct bsdtar *bsdtar, struct archive *a, 979 struct archive_entry *entry) 980 { 981 write_entry(bsdtar, a, entry); 982 } 983 984 /* 985 * Write a single entry to the archive. 986 */ 987 static void 988 write_entry(struct bsdtar *bsdtar, struct archive *a, 989 struct archive_entry *entry) 990 { 991 int e; 992 993 e = archive_write_header(a, entry); 994 if (e != ARCHIVE_OK) { 995 if (bsdtar->verbose > 0) { 996 safe_fprintf(stderr, "a "); 997 list_item_verbose(bsdtar, stderr, entry); 998 lafe_warnc(0, ": %s", archive_error_string(a)); 999 } else { 1000 lafe_warnc(0, "%s: %s", 1001 archive_entry_pathname(entry), 1002 archive_error_string(a)); 1003 } 1004 } 1005 1006 if (e == ARCHIVE_FATAL) 1007 exit(1); 1008 1009 /* 1010 * If we opened a file earlier, write it out now. Note that 1011 * the format handler might have reset the size field to zero 1012 * to inform us that the archive body won't get stored. In 1013 * that case, just skip the write. 1014 */ 1015 if (e >= ARCHIVE_WARN && archive_entry_size(entry) > 0) { 1016 if (copy_file_data_block(bsdtar, a, bsdtar->diskreader, entry)) 1017 exit(1); 1018 } 1019 } 1020 1021 static void 1022 report_write(struct bsdtar *bsdtar, struct archive *a, 1023 struct archive_entry *entry, int64_t progress) 1024 { 1025 uint64_t comp, uncomp; 1026 int compression; 1027 1028 if (bsdtar->verbose) 1029 fprintf(stderr, "\n"); 1030 comp = archive_filter_bytes(a, -1); 1031 uncomp = archive_filter_bytes(a, 0); 1032 fprintf(stderr, "In: %d files, %s bytes;", 1033 archive_file_count(a), tar_i64toa(uncomp)); 1034 if (comp >= uncomp) 1035 compression = 0; 1036 else 1037 compression = (int)((uncomp - comp) * 100 / uncomp); 1038 fprintf(stderr, 1039 " Out: %s bytes, compression %d%%\n", 1040 tar_i64toa(comp), compression); 1041 /* Can't have two calls to tar_i64toa() pending, so split the output. */ 1042 safe_fprintf(stderr, "Current: %s (%s", 1043 archive_entry_pathname(entry), 1044 tar_i64toa(progress)); 1045 fprintf(stderr, "/%s bytes)\n", 1046 tar_i64toa(archive_entry_size(entry))); 1047 } 1048 1049 static void 1050 test_for_append(struct bsdtar *bsdtar) 1051 { 1052 struct stat s; 1053 1054 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) 1055 lafe_errc(1, 0, "no files or directories specified"); 1056 if (bsdtar->filename == NULL) 1057 lafe_errc(1, 0, "Cannot append to stdout"); 1058 1059 if (stat(bsdtar->filename, &s) != 0) 1060 return; 1061 1062 if (!S_ISREG(s.st_mode) && !S_ISBLK(s.st_mode)) 1063 lafe_errc(1, 0, 1064 "Cannot append to %s: not a regular file", 1065 bsdtar->filename); 1066 1067 /* Is this an appropriate check here on Windows? */ 1068 /* 1069 if (GetFileType(handle) != FILE_TYPE_DISK) 1070 lafe_errc(1, 0, "Cannot append"); 1071 */ 1072 1073 } 1074
Indexes created Wed Jul 15 00:26:21 UTC 2026