write.c revision 1.1.1.7
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 "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 #define open _open 115 #define close _close 116 #define read _read 117 #ifdef lseek 118 #undef lseek 119 #endif 120 #define lseek seek_file 121 #endif 122 123 static void 124 set_writer_options(struct bsdtar *bsdtar, struct archive *a) 125 { 126 const char *writer_options; 127 int r; 128 129 writer_options = getenv(ENV_WRITER_OPTIONS); 130 if (writer_options != NULL) { 131 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; 132 size_t opt_len = strlen(writer_options) + 1; 133 char *p; 134 /* Set default write options. */ 135 if ((p = malloc(module_len + opt_len)) == NULL) 136 lafe_errc(1, errno, "Out of memory"); 137 /* Prepend magic code to ignore options for 138 * a format or filters which are not added to 139 * the archive write object. */ 140 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); 141 memcpy(p, writer_options, opt_len); 142 r = archive_write_set_options(a, p); 143 free(p); 144 if (r < ARCHIVE_WARN) 145 lafe_errc(1, 0, "%s", archive_error_string(a)); 146 else 147 archive_clear_error(a); 148 } 149 if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) 150 lafe_errc(1, 0, "%s", archive_error_string(a)); 151 } 152 153 static void 154 set_reader_options(struct bsdtar *bsdtar, struct archive *a) 155 { 156 const char *reader_options; 157 int r; 158 159 (void)bsdtar; /* UNUSED */ 160 161 reader_options = getenv(ENV_READER_OPTIONS); 162 if (reader_options != NULL) { 163 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; 164 size_t opt_len = strlen(reader_options) + 1; 165 char *p; 166 /* Set default write options. */ 167 if ((p = malloc(module_len + opt_len)) == NULL) 168 if (p == NULL) 169 lafe_errc(1, errno, "Out of memory"); 170 /* Prepend magic code to ignore options for 171 * a format or filters which are not added to 172 * the archive write object. */ 173 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); 174 memcpy(p, reader_options, opt_len); 175 r = archive_read_set_options(a, p); 176 free(p); 177 if (r < ARCHIVE_WARN) 178 lafe_errc(1, 0, "%s", archive_error_string(a)); 179 else 180 archive_clear_error(a); 181 } 182 if (bsdtar->flags & OPTFLAG_IGNORE_ZEROS) 183 if (archive_read_set_options(a, 184 "read_concatenated_archives") != ARCHIVE_OK) 185 lafe_errc(1, 0, "%s", archive_error_string(a)); 186 } 187 188 void 189 tar_mode_c(struct bsdtar *bsdtar) 190 { 191 struct archive *a; 192 const void *filter_name; 193 int r; 194 195 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) 196 lafe_errc(1, 0, "no files or directories specified"); 197 198 a = archive_write_new(); 199 200 /* Support any format that the library supports. */ 201 if (cset_get_format(bsdtar->cset) == NULL) { 202 r = archive_write_set_format_pax_restricted(a); 203 cset_set_format(bsdtar->cset, "pax restricted"); 204 } else { 205 r = archive_write_set_format_by_name(a, 206 cset_get_format(bsdtar->cset)); 207 } 208 if (r != ARCHIVE_OK) { 209 fprintf(stderr, "Can't use format %s: %s\n", 210 cset_get_format(bsdtar->cset), 211 archive_error_string(a)); 212 usage(); 213 } 214 215 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); 216 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block); 217 218 r = cset_write_add_filters(bsdtar->cset, a, &filter_name); 219 if (r < ARCHIVE_WARN) { 220 lafe_errc(1, 0, "Unsupported compression option --%s", 221 (const char *)filter_name); 222 } 223 224 set_writer_options(bsdtar, a); 225 if (bsdtar->passphrase != NULL) 226 r = archive_write_set_passphrase(a, bsdtar->passphrase); 227 else 228 r = archive_write_set_passphrase_callback(a, bsdtar, 229 &passphrase_callback); 230 if (r != ARCHIVE_OK) 231 lafe_errc(1, 0, "%s", archive_error_string(a)); 232 if (ARCHIVE_OK != archive_write_open_filename(a, bsdtar->filename)) 233 lafe_errc(1, 0, "%s", archive_error_string(a)); 234 write_archive(a, bsdtar); 235 } 236 237 /* 238 * Same as 'c', except we only support tar or empty formats in 239 * uncompressed files on disk. 240 */ 241 void 242 tar_mode_r(struct bsdtar *bsdtar) 243 { 244 int64_t end_offset; 245 int format; 246 struct archive *a; 247 struct archive_entry *entry; 248 int r; 249 250 /* Sanity-test some arguments and the file. */ 251 test_for_append(bsdtar); 252 253 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 254 255 #if defined(__BORLANDC__) 256 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY); 257 #else 258 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY, 0666); 259 #endif 260 if (bsdtar->fd < 0) 261 lafe_errc(1, errno, 262 "Cannot open %s", bsdtar->filename); 263 264 a = archive_read_new(); 265 archive_read_support_filter_all(a); 266 archive_read_support_format_empty(a); 267 archive_read_support_format_tar(a); 268 archive_read_support_format_gnutar(a); 269 set_reader_options(bsdtar, a); 270 r = archive_read_open_fd(a, bsdtar->fd, 10240); 271 if (r != ARCHIVE_OK) 272 lafe_errc(1, archive_errno(a), 273 "Can't read archive %s: %s", bsdtar->filename, 274 archive_error_string(a)); 275 while (0 == archive_read_next_header(a, &entry)) { 276 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) { 277 archive_read_free(a); 278 close(bsdtar->fd); 279 lafe_errc(1, 0, 280 "Cannot append to compressed archive."); 281 } 282 /* Keep going until we hit end-of-archive */ 283 format = archive_format(a); 284 } 285 286 end_offset = archive_read_header_position(a); 287 archive_read_free(a); 288 289 /* Re-open archive for writing */ 290 a = archive_write_new(); 291 /* 292 * Set the format to be used for writing. To allow people to 293 * extend empty files, we need to allow them to specify the format, 294 * which opens the possibility that they will specify a format that 295 * doesn't match the existing format. Hence, the following bit 296 * of arcane ugliness. 297 */ 298 299 if (cset_get_format(bsdtar->cset) != NULL) { 300 /* If the user requested a format, use that, but ... */ 301 archive_write_set_format_by_name(a, 302 cset_get_format(bsdtar->cset)); 303 /* ... complain if it's not compatible. */ 304 format &= ARCHIVE_FORMAT_BASE_MASK; 305 if (format != (int)(archive_format(a) & ARCHIVE_FORMAT_BASE_MASK) 306 && format != ARCHIVE_FORMAT_EMPTY) { 307 lafe_errc(1, 0, 308 "Format %s is incompatible with the archive %s.", 309 cset_get_format(bsdtar->cset), bsdtar->filename); 310 } 311 } else { 312 /* 313 * Just preserve the current format, with a little care 314 * for formats that libarchive can't write. 315 */ 316 if (format == ARCHIVE_FORMAT_EMPTY) 317 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 318 archive_write_set_format(a, format); 319 } 320 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0) 321 lafe_errc(1, errno, "Could not seek to archive end"); 322 set_writer_options(bsdtar, a); 323 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) 324 lafe_errc(1, 0, "%s", archive_error_string(a)); 325 326 write_archive(a, bsdtar); /* XXX check return val XXX */ 327 328 close(bsdtar->fd); 329 bsdtar->fd = -1; 330 } 331 332 void 333 tar_mode_u(struct bsdtar *bsdtar) 334 { 335 int64_t end_offset; 336 struct archive *a; 337 struct archive_entry *entry; 338 int format; 339 struct archive_dir_entry *p; 340 struct archive_dir archive_dir; 341 342 bsdtar->archive_dir = &archive_dir; 343 memset(&archive_dir, 0, sizeof(archive_dir)); 344 345 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 346 347 /* Sanity-test some arguments and the file. */ 348 test_for_append(bsdtar); 349 350 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_BINARY); 351 if (bsdtar->fd < 0) 352 lafe_errc(1, errno, 353 "Cannot open %s", bsdtar->filename); 354 355 a = archive_read_new(); 356 archive_read_support_filter_all(a); 357 archive_read_support_format_tar(a); 358 archive_read_support_format_gnutar(a); 359 set_reader_options(bsdtar, a); 360 if (archive_read_open_fd(a, bsdtar->fd, bsdtar->bytes_per_block) 361 != ARCHIVE_OK) { 362 lafe_errc(1, 0, 363 "Can't open %s: %s", bsdtar->filename, 364 archive_error_string(a)); 365 } 366 367 /* Build a list of all entries and their recorded mod times. */ 368 while (0 == archive_read_next_header(a, &entry)) { 369 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) { 370 archive_read_free(a); 371 close(bsdtar->fd); 372 lafe_errc(1, 0, 373 "Cannot append to compressed archive."); 374 } 375 if (archive_match_exclude_entry(bsdtar->matching, 376 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER | 377 ARCHIVE_MATCH_EQUAL, entry) != ARCHIVE_OK) 378 lafe_errc(1, 0, "Error : %s", 379 archive_error_string(bsdtar->matching)); 380 /* Record the last format determination we see */ 381 format = archive_format(a); 382 /* Keep going until we hit end-of-archive */ 383 } 384 385 end_offset = archive_read_header_position(a); 386 archive_read_free(a); 387 388 /* Re-open archive for writing. */ 389 a = archive_write_new(); 390 /* 391 * Set format to same one auto-detected above. 392 */ 393 archive_write_set_format(a, format); 394 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); 395 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block); 396 397 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0) 398 lafe_errc(1, errno, "Could not seek to archive end"); 399 set_writer_options(bsdtar, a); 400 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) 401 lafe_errc(1, 0, "%s", archive_error_string(a)); 402 403 write_archive(a, bsdtar); 404 405 close(bsdtar->fd); 406 bsdtar->fd = -1; 407 408 while (bsdtar->archive_dir->head != NULL) { 409 p = bsdtar->archive_dir->head->next; 410 free(bsdtar->archive_dir->head->name); 411 free(bsdtar->archive_dir->head); 412 bsdtar->archive_dir->head = p; 413 } 414 bsdtar->archive_dir->tail = NULL; 415 } 416 417 418 /* 419 * Write user-specified files/dirs to opened archive. 420 */ 421 static void 422 write_archive(struct archive *a, struct bsdtar *bsdtar) 423 { 424 const char *arg; 425 struct archive_entry *entry, *sparse_entry; 426 427 /* Choose a suitable copy buffer size */ 428 bsdtar->buff_size = 64 * 1024; 429 while (bsdtar->buff_size < (size_t)bsdtar->bytes_per_block) 430 bsdtar->buff_size *= 2; 431 /* Try to compensate for space we'll lose to alignment. */ 432 bsdtar->buff_size += 16 * 1024; 433 434 /* Allocate a buffer for file data. */ 435 if ((bsdtar->buff = malloc(bsdtar->buff_size)) == NULL) 436 lafe_errc(1, 0, "cannot allocate memory"); 437 438 if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL) 439 lafe_errc(1, 0, "cannot create link resolver"); 440 archive_entry_linkresolver_set_strategy(bsdtar->resolver, 441 archive_format(a)); 442 443 /* Create a read_disk object. */ 444 if ((bsdtar->diskreader = archive_read_disk_new()) == NULL) 445 lafe_errc(1, 0, "Cannot create read_disk object"); 446 /* Tell the read_disk how handle symlink. */ 447 switch (bsdtar->symlink_mode) { 448 case 'H': 449 archive_read_disk_set_symlink_hybrid(bsdtar->diskreader); 450 break; 451 case 'L': 452 archive_read_disk_set_symlink_logical(bsdtar->diskreader); 453 break; 454 default: 455 archive_read_disk_set_symlink_physical(bsdtar->diskreader); 456 break; 457 } 458 /* Register entry filters. */ 459 archive_read_disk_set_matching(bsdtar->diskreader, 460 bsdtar->matching, excluded_callback, bsdtar); 461 archive_read_disk_set_metadata_filter_callback( 462 bsdtar->diskreader, metadata_filter, bsdtar); 463 /* Set the behavior of archive_read_disk. */ 464 archive_read_disk_set_behavior(bsdtar->diskreader, 465 bsdtar->readdisk_flags); 466 archive_read_disk_set_standard_lookup(bsdtar->diskreader); 467 468 if (bsdtar->names_from_file != NULL) 469 archive_names_from_file(bsdtar, a); 470 471 while (*bsdtar->argv) { 472 arg = *bsdtar->argv; 473 if (arg[0] == '-' && arg[1] == 'C') { 474 arg += 2; 475 if (*arg == '\0') { 476 bsdtar->argv++; 477 arg = *bsdtar->argv; 478 if (arg == NULL) { 479 lafe_warnc(0, "%s", 480 "Missing argument for -C"); 481 bsdtar->return_value = 1; 482 goto cleanup; 483 } 484 if (*arg == '\0') { 485 lafe_warnc(0, 486 "Meaningless argument for -C: ''"); 487 bsdtar->return_value = 1; 488 goto cleanup; 489 } 490 } 491 set_chdir(bsdtar, arg); 492 } else { 493 if (*arg != '/') 494 do_chdir(bsdtar); /* Handle a deferred -C */ 495 if (*arg == '@') { 496 if (append_archive_filename(bsdtar, a, 497 arg + 1) != 0) 498 break; 499 } else 500 write_hierarchy(bsdtar, a, arg); 501 } 502 bsdtar->argv++; 503 } 504 505 archive_read_disk_set_matching(bsdtar->diskreader, NULL, NULL, NULL); 506 archive_read_disk_set_metadata_filter_callback( 507 bsdtar->diskreader, NULL, NULL); 508 entry = NULL; 509 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); 510 while (entry != NULL) { 511 int r; 512 struct archive_entry *entry2; 513 struct archive *disk = bsdtar->diskreader; 514 515 /* 516 * This tricky code here is to correctly read the contents 517 * of the entry because the disk reader bsdtar->diskreader 518 * is pointing at does not have any information about the 519 * entry by this time and using archive_read_data_block() 520 * with the disk reader consequently must fail. And we 521 * have to re-open the entry to read the contents. 522 */ 523 /* TODO: Work with -C option as well. */ 524 r = archive_read_disk_open(disk, 525 archive_entry_sourcepath(entry)); 526 if (r != ARCHIVE_OK) { 527 lafe_warnc(archive_errno(disk), 528 "%s", archive_error_string(disk)); 529 bsdtar->return_value = 1; 530 goto next_entry; 531 } 532 533 /* 534 * Invoke archive_read_next_header2() to work 535 * archive_read_data_block(), which is called via write_file(), 536 * without failure. 537 */ 538 entry2 = archive_entry_new(); 539 r = archive_read_next_header2(disk, entry2); 540 archive_entry_free(entry2); 541 if (r != ARCHIVE_OK) { 542 lafe_warnc(archive_errno(disk), 543 "%s", archive_error_string(disk)); 544 if (r == ARCHIVE_FATAL) 545 bsdtar->return_value = 1; 546 archive_read_close(disk); 547 goto next_entry; 548 } 549 550 write_file(bsdtar, a, entry); 551 archive_read_close(disk); 552 next_entry: 553 archive_entry_free(entry); 554 entry = NULL; 555 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); 556 } 557 558 if (archive_write_close(a)) { 559 lafe_warnc(0, "%s", archive_error_string(a)); 560 bsdtar->return_value = 1; 561 } 562 563 cleanup: 564 /* Free file data buffer. */ 565 free(bsdtar->buff); 566 archive_entry_linkresolver_free(bsdtar->resolver); 567 bsdtar->resolver = NULL; 568 archive_read_free(bsdtar->diskreader); 569 bsdtar->diskreader = NULL; 570 571 if (bsdtar->flags & OPTFLAG_TOTALS) { 572 fprintf(stderr, "Total bytes written: %s\n", 573 tar_i64toa(archive_filter_bytes(a, -1))); 574 } 575 576 archive_write_free(a); 577 } 578 579 /* 580 * Archive names specified in file. 581 * 582 * Unless --null was specified, a line containing exactly "-C" will 583 * cause the next line to be a directory to pass to chdir(). If 584 * --null is specified, then a line "-C" is just another filename. 585 */ 586 static void 587 archive_names_from_file(struct bsdtar *bsdtar, struct archive *a) 588 { 589 struct lafe_line_reader *lr; 590 const char *line; 591 592 bsdtar->next_line_is_dir = 0; 593 594 lr = lafe_line_reader(bsdtar->names_from_file, 595 (bsdtar->flags & OPTFLAG_NULL)); 596 while ((line = lafe_line_reader_next(lr)) != NULL) { 597 if (bsdtar->next_line_is_dir) { 598 if (*line != '\0') 599 set_chdir(bsdtar, line); 600 else { 601 lafe_warnc(0, 602 "Meaningless argument for -C: ''"); 603 bsdtar->return_value = 1; 604 } 605 bsdtar->next_line_is_dir = 0; 606 } else if (((bsdtar->flags & OPTFLAG_NULL) == 0) && 607 strcmp(line, "-C") == 0) 608 bsdtar->next_line_is_dir = 1; 609 else { 610 if (*line != '/') 611 do_chdir(bsdtar); /* Handle a deferred -C */ 612 write_hierarchy(bsdtar, a, line); 613 } 614 } 615 lafe_line_reader_free(lr); 616 if (bsdtar->next_line_is_dir) 617 lafe_errc(1, errno, 618 "Unexpected end of filename list; " 619 "directory expected after -C"); 620 } 621 622 /* 623 * Copy from specified archive to current archive. Returns non-zero 624 * for write errors (which force us to terminate the entire archiving 625 * operation). If there are errors reading the input archive, we set 626 * bsdtar->return_value but return zero, so the overall archiving 627 * operation will complete and return non-zero. 628 */ 629 static int 630 append_archive_filename(struct bsdtar *bsdtar, struct archive *a, 631 const char *raw_filename) 632 { 633 struct archive *ina; 634 const char *filename = raw_filename; 635 int rc; 636 637 if (strcmp(filename, "-") == 0) 638 filename = NULL; /* Library uses NULL for stdio. */ 639 640 ina = archive_read_new(); 641 archive_read_support_format_all(ina); 642 archive_read_support_filter_all(ina); 643 set_reader_options(bsdtar, ina); 644 archive_read_set_options(ina, "mtree:checkfs"); 645 if (bsdtar->passphrase != NULL) 646 rc = archive_read_add_passphrase(a, bsdtar->passphrase); 647 else 648 rc = archive_read_set_passphrase_callback(ina, bsdtar, 649 &passphrase_callback); 650 if (rc != ARCHIVE_OK) 651 lafe_errc(1, 0, "%s", archive_error_string(a)); 652 if (archive_read_open_filename(ina, filename, 653 bsdtar->bytes_per_block)) { 654 lafe_warnc(0, "%s", archive_error_string(ina)); 655 bsdtar->return_value = 1; 656 return (0); 657 } 658 659 rc = append_archive(bsdtar, a, ina); 660 661 if (rc != ARCHIVE_OK) { 662 lafe_warnc(0, "Error reading archive %s: %s", 663 raw_filename, archive_error_string(ina)); 664 bsdtar->return_value = 1; 665 } 666 archive_read_free(ina); 667 668 return (rc); 669 } 670 671 static int 672 append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina) 673 { 674 struct archive_entry *in_entry; 675 int e; 676 677 while (ARCHIVE_OK == (e = archive_read_next_header(ina, &in_entry))) { 678 if (archive_match_excluded(bsdtar->matching, in_entry)) 679 continue; 680 if(edit_pathname(bsdtar, in_entry)) 681 continue; 682 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 683 !yes("copy '%s'", archive_entry_pathname(in_entry))) 684 continue; 685 if (bsdtar->verbose > 1) { 686 safe_fprintf(stderr, "a "); 687 list_item_verbose(bsdtar, stderr, in_entry); 688 } else if (bsdtar->verbose > 0) 689 safe_fprintf(stderr, "a %s", 690 archive_entry_pathname(in_entry)); 691 if (need_report()) 692 report_write(bsdtar, a, in_entry, 0); 693 694 e = archive_write_header(a, in_entry); 695 if (e != ARCHIVE_OK) { 696 if (!bsdtar->verbose) 697 lafe_warnc(0, "%s: %s", 698 archive_entry_pathname(in_entry), 699 archive_error_string(a)); 700 else 701 fprintf(stderr, ": %s", archive_error_string(a)); 702 } 703 if (e == ARCHIVE_FATAL) 704 exit(1); 705 706 if (e >= ARCHIVE_WARN) { 707 if (archive_entry_size(in_entry) == 0) 708 archive_read_data_skip(ina); 709 else if (copy_file_data_block(bsdtar, a, ina, in_entry)) 710 exit(1); 711 } 712 713 if (bsdtar->verbose) 714 fprintf(stderr, "\n"); 715 } 716 717 return (e == ARCHIVE_EOF ? ARCHIVE_OK : e); 718 } 719 720 /* Helper function to copy file to archive. */ 721 static int 722 copy_file_data_block(struct bsdtar *bsdtar, struct archive *a, 723 struct archive *in_a, struct archive_entry *entry) 724 { 725 size_t bytes_read; 726 ssize_t bytes_written; 727 int64_t offset, progress = 0; 728 char *null_buff = NULL; 729 const void *buff; 730 int r; 731 732 while ((r = archive_read_data_block(in_a, &buff, 733 &bytes_read, &offset)) == ARCHIVE_OK) { 734 if (need_report()) 735 report_write(bsdtar, a, entry, progress); 736 737 if (offset > progress) { 738 int64_t sparse = offset - progress; 739 size_t ns; 740 741 if (null_buff == NULL) { 742 null_buff = bsdtar->buff; 743 memset(null_buff, 0, bsdtar->buff_size); 744 } 745 746 while (sparse > 0) { 747 if (sparse > (int64_t)bsdtar->buff_size) 748 ns = bsdtar->buff_size; 749 else 750 ns = (size_t)sparse; 751 bytes_written = 752 archive_write_data(a, null_buff, ns); 753 if (bytes_written < 0) { 754 /* Write failed; this is bad */ 755 lafe_warnc(0, "%s", 756 archive_error_string(a)); 757 return (-1); 758 } 759 if ((size_t)bytes_written < ns) { 760 /* Write was truncated; warn but 761 * continue. */ 762 lafe_warnc(0, 763 "%s: Truncated write; file may " 764 "have grown while being archived.", 765 archive_entry_pathname(entry)); 766 return (0); 767 } 768 progress += bytes_written; 769 sparse -= bytes_written; 770 } 771 } 772 773 bytes_written = archive_write_data(a, buff, bytes_read); 774 if (bytes_written < 0) { 775 /* Write failed; this is bad */ 776 lafe_warnc(0, "%s", archive_error_string(a)); 777 return (-1); 778 } 779 if ((size_t)bytes_written < bytes_read) { 780 /* Write was truncated; warn but continue. */ 781 lafe_warnc(0, 782 "%s: Truncated write; file may have grown " 783 "while being archived.", 784 archive_entry_pathname(entry)); 785 return (0); 786 } 787 progress += bytes_written; 788 } 789 if (r < ARCHIVE_WARN) { 790 lafe_warnc(archive_errno(a), "%s", archive_error_string(a)); 791 return (-1); 792 } 793 return (0); 794 } 795 796 static void 797 excluded_callback(struct archive *a, void *_data, struct archive_entry *entry) 798 { 799 struct bsdtar *bsdtar = (struct bsdtar *)_data; 800 801 if (bsdtar->flags & OPTFLAG_NO_SUBDIRS) 802 return; 803 if (!archive_read_disk_can_descend(a)) 804 return; 805 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 806 !yes("add '%s'", archive_entry_pathname(entry))) 807 return; 808 archive_read_disk_descend(a); 809 } 810 811 static int 812 metadata_filter(struct archive *a, void *_data, struct archive_entry *entry) 813 { 814 struct bsdtar *bsdtar = (struct bsdtar *)_data; 815 816 /* XXX TODO: check whether this filesystem is 817 * synthetic and/or local. Add a new 818 * --local-only option to skip non-local 819 * filesystems. Skip synthetic filesystems 820 * regardless. 821 * 822 * The results should be cached, since 823 * tree.c doesn't usually visit a directory 824 * and the directory contents together. A simple 825 * move-to-front list should perform quite well. 826 * 827 * Use archive_read_disk_current_filesystem_is_remote(). 828 */ 829 830 /* 831 * If the user vetoes this file/directory, skip it. 832 * We want this to be fairly late; if some other 833 * check would veto this file, we shouldn't bother 834 * the user with it. 835 */ 836 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 837 !yes("add '%s'", archive_entry_pathname(entry))) 838 return (0); 839 840 /* Note: if user vetoes, we won't descend. */ 841 if (((bsdtar->flags & OPTFLAG_NO_SUBDIRS) == 0) && 842 archive_read_disk_can_descend(a)) 843 archive_read_disk_descend(a); 844 845 return (1); 846 } 847 848 /* 849 * Add the file or dir hierarchy named by 'path' to the archive 850 */ 851 static void 852 write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path) 853 { 854 struct archive *disk = bsdtar->diskreader; 855 struct archive_entry *entry = NULL, *spare_entry = NULL; 856 int r; 857 858 r = archive_read_disk_open(disk, path); 859 if (r != ARCHIVE_OK) { 860 lafe_warnc(archive_errno(disk), 861 "%s", archive_error_string(disk)); 862 bsdtar->return_value = 1; 863 return; 864 } 865 bsdtar->first_fs = -1; 866 867 for (;;) { 868 archive_entry_free(entry); 869 entry = archive_entry_new(); 870 r = archive_read_next_header2(disk, entry); 871 if (r == ARCHIVE_EOF) 872 break; 873 else if (r != ARCHIVE_OK) { 874 lafe_warnc(archive_errno(disk), 875 "%s", archive_error_string(disk)); 876 if (r == ARCHIVE_FATAL || r == ARCHIVE_FAILED) { 877 bsdtar->return_value = 1; 878 archive_entry_free(entry); 879 archive_read_close(disk); 880 return; 881 } else if (r < ARCHIVE_WARN) 882 continue; 883 } 884 885 if (bsdtar->uid >= 0) { 886 archive_entry_set_uid(entry, bsdtar->uid); 887 if (!bsdtar->uname) 888 archive_entry_set_uname(entry, 889 archive_read_disk_uname(bsdtar->diskreader, 890 bsdtar->uid)); 891 } 892 if (bsdtar->gid >= 0) { 893 archive_entry_set_gid(entry, bsdtar->gid); 894 if (!bsdtar->gname) 895 archive_entry_set_gname(entry, 896 archive_read_disk_gname(bsdtar->diskreader, 897 bsdtar->gid)); 898 } 899 if (bsdtar->uname) 900 archive_entry_set_uname(entry, bsdtar->uname); 901 if (bsdtar->gname) 902 archive_entry_set_gname(entry, bsdtar->gname); 903 904 /* 905 * Rewrite the pathname to be archived. If rewrite 906 * fails, skip the entry. 907 */ 908 if (edit_pathname(bsdtar, entry)) 909 continue; 910 911 /* Display entry as we process it. */ 912 if (bsdtar->verbose > 1) { 913 safe_fprintf(stderr, "a "); 914 list_item_verbose(bsdtar, stderr, entry); 915 } else if (bsdtar->verbose > 0) { 916 /* This format is required by SUSv2. */ 917 safe_fprintf(stderr, "a %s", 918 archive_entry_pathname(entry)); 919 } 920 921 /* Non-regular files get archived with zero size. */ 922 if (archive_entry_filetype(entry) != AE_IFREG) 923 archive_entry_set_size(entry, 0); 924 925 archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry); 926 927 while (entry != NULL) { 928 write_file(bsdtar, a, entry); 929 if (entry != spare_entry) { 930 archive_entry_free(entry); 931 } 932 entry = spare_entry; 933 spare_entry = NULL; 934 } 935 936 if (bsdtar->verbose) 937 fprintf(stderr, "\n"); 938 } 939 archive_entry_free(entry); 940 archive_read_close(disk); 941 } 942 943 /* 944 * Write a single file (or directory or other filesystem object) to 945 * the archive. 946 */ 947 static void 948 write_file(struct bsdtar *bsdtar, struct archive *a, 949 struct archive_entry *entry) 950 { 951 write_entry(bsdtar, a, entry); 952 } 953 954 /* 955 * Write a single entry to the archive. 956 */ 957 static void 958 write_entry(struct bsdtar *bsdtar, struct archive *a, 959 struct archive_entry *entry) 960 { 961 int e; 962 963 e = archive_write_header(a, entry); 964 if (e != ARCHIVE_OK) { 965 if (bsdtar->verbose > 1) { 966 safe_fprintf(stderr, "a "); 967 list_item_verbose(bsdtar, stderr, entry); 968 lafe_warnc(0, ": %s", archive_error_string(a)); 969 } else { 970 lafe_warnc(0, "%s: %s", 971 archive_entry_pathname(entry), 972 archive_error_string(a)); 973 } 974 } 975 976 if (e == ARCHIVE_FATAL) 977 exit(1); 978 979 /* 980 * If we opened a file earlier, write it out now. Note that 981 * the format handler might have reset the size field to zero 982 * to inform us that the archive body won't get stored. In 983 * that case, just skip the write. 984 */ 985 if (e >= ARCHIVE_WARN && archive_entry_size(entry) > 0) { 986 if (copy_file_data_block(bsdtar, a, bsdtar->diskreader, entry)) 987 exit(1); 988 } 989 } 990 991 static void 992 report_write(struct bsdtar *bsdtar, struct archive *a, 993 struct archive_entry *entry, int64_t progress) 994 { 995 uint64_t comp, uncomp; 996 int compression; 997 998 if (bsdtar->verbose) 999 fprintf(stderr, "\n"); 1000 comp = archive_filter_bytes(a, -1); 1001 uncomp = archive_filter_bytes(a, 0); 1002 fprintf(stderr, "In: %d files, %s bytes;", 1003 archive_file_count(a), tar_i64toa(uncomp)); 1004 if (comp >= uncomp) 1005 compression = 0; 1006 else 1007 compression = (int)((uncomp - comp) * 100 / uncomp); 1008 fprintf(stderr, 1009 " Out: %s bytes, compression %d%%\n", 1010 tar_i64toa(comp), compression); 1011 /* Can't have two calls to tar_i64toa() pending, so split the output. */ 1012 safe_fprintf(stderr, "Current: %s (%s", 1013 archive_entry_pathname(entry), 1014 tar_i64toa(progress)); 1015 fprintf(stderr, "/%s bytes)\n", 1016 tar_i64toa(archive_entry_size(entry))); 1017 } 1018 1019 static void 1020 test_for_append(struct bsdtar *bsdtar) 1021 { 1022 struct stat s; 1023 1024 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) 1025 lafe_errc(1, 0, "no files or directories specified"); 1026 if (bsdtar->filename == NULL) 1027 lafe_errc(1, 0, "Cannot append to stdout."); 1028 1029 if (stat(bsdtar->filename, &s) != 0) 1030 return; 1031 1032 if (!S_ISREG(s.st_mode) && !S_ISBLK(s.st_mode)) 1033 lafe_errc(1, 0, 1034 "Cannot append to %s: not a regular file.", 1035 bsdtar->filename); 1036 1037 /* Is this an appropriate check here on Windows? */ 1038 /* 1039 if (GetFileType(handle) != FILE_TYPE_DISK) 1040 lafe_errc(1, 0, "Cannot append"); 1041 */ 1042 1043 } 1044
Indexes created Wed Jul 15 00:26:21 UTC 2026