1/*- 2 * Copyright (c) 2003-2007 Tim Kientzle 3 * Copyright (c) 2012 Michihiro NAKAJIMA 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include "bsdtar_platform.h" 28__FBSDID("$FreeBSD: stable/11/contrib/libarchive/tar/write.c 342360 2018-12-21 23:33:05Z mm $"); 29 30#ifdef HAVE_SYS_TYPES_H 31#include <sys/types.h> 32#endif 33#ifdef HAVE_SYS_STAT_H 34#include <sys/stat.h> 35#endif 36#ifdef HAVE_ATTR_XATTR_H 37#include <attr/xattr.h> 38#endif 39#ifdef HAVE_ERRNO_H 40#include <errno.h> 41#endif 42#ifdef HAVE_FCNTL_H 43#include <fcntl.h> 44#endif 45#ifdef HAVE_GRP_H 46#include <grp.h> 47#endif 48#ifdef HAVE_IO_H 49#include <io.h> 50#endif 51#ifdef HAVE_LIBGEN_H 52#include <libgen.h> 53#endif 54#ifdef HAVE_LIMITS_H 55#include <limits.h> 56#endif 57#ifdef HAVE_PATHS_H 58#include <paths.h> 59#endif 60#ifdef HAVE_PWD_H 61#include <pwd.h> 62#endif 63#ifdef HAVE_STDINT_H 64#include <stdint.h> 65#endif 66#include <stdio.h> 67#ifdef HAVE_STDLIB_H 68#include <stdlib.h> 69#endif 70#ifdef HAVE_STRING_H 71#include <string.h> 72#endif 73#ifdef HAVE_UNISTD_H 74#include <unistd.h> 75#endif 76 77#include "bsdtar.h" 78#include "err.h" 79#include "line_reader.h" 80 81#ifndef O_BINARY 82#define O_BINARY 0 83#endif 84 85struct archive_dir_entry { 86 struct archive_dir_entry *next; 87 time_t mtime_sec; 88 int mtime_nsec; 89 char *name; 90}; 91 92struct archive_dir { 93 struct archive_dir_entry *head, *tail; 94}; 95 96static int append_archive(struct bsdtar *, struct archive *, 97 struct archive *ina); 98static int append_archive_filename(struct bsdtar *, 99 struct archive *, const char *fname); 100static void archive_names_from_file(struct bsdtar *bsdtar, 101 struct archive *a); 102static int copy_file_data_block(struct bsdtar *, 103 struct archive *a, struct archive *, 104 struct archive_entry *); 105static void excluded_callback(struct archive *, void *, 106 struct archive_entry *); 107static void report_write(struct bsdtar *, struct archive *, 108 struct archive_entry *, int64_t progress); 109static void test_for_append(struct bsdtar *); 110static int metadata_filter(struct archive *, void *, 111 struct archive_entry *); 112static void write_archive(struct archive *, struct bsdtar *); 113static void write_entry(struct bsdtar *, struct archive *, 114 struct archive_entry *); 115static void write_file(struct bsdtar *, struct archive *, 116 struct archive_entry *); 117static void write_hierarchy(struct bsdtar *, struct archive *, 118 const char *); 119 120#if defined(_WIN32) && !defined(__CYGWIN__) 121/* Not a full lseek() emulation, but enough for our needs here. */ 122static int 123seek_file(int fd, int64_t offset, int whence) 124{ 125 LARGE_INTEGER distance; 126 (void)whence; /* UNUSED */ 127 distance.QuadPart = offset; 128 return (SetFilePointerEx((HANDLE)_get_osfhandle(fd), 129 distance, NULL, FILE_BEGIN) ? 1 : -1); 130} 131#define open _open 132#define close _close 133#define read _read 134#ifdef lseek 135#undef lseek 136#endif 137#define lseek seek_file 138#endif 139 140static void 141set_writer_options(struct bsdtar *bsdtar, struct archive *a) 142{ 143 const char *writer_options; 144 int r; 145 146 writer_options = getenv(ENV_WRITER_OPTIONS); 147 if (writer_options != NULL) { 148 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; 149 size_t opt_len = strlen(writer_options) + 1; 150 char *p; 151 /* Set default write options. */ 152 if ((p = malloc(module_len + opt_len)) == NULL) 153 lafe_errc(1, errno, "Out of memory"); 154 /* Prepend magic code to ignore options for 155 * a format or filters which are not added to 156 * the archive write object. */ 157 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); 158 memcpy(p, writer_options, opt_len); 159 r = archive_write_set_options(a, p); 160 free(p); 161 if (r < ARCHIVE_WARN) 162 lafe_errc(1, 0, "%s", archive_error_string(a)); 163 else 164 archive_clear_error(a); 165 } 166 if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) 167 lafe_errc(1, 0, "%s", archive_error_string(a)); 168} 169 170static void 171set_reader_options(struct bsdtar *bsdtar, struct archive *a) 172{ 173 const char *reader_options; 174 int r; 175 176 (void)bsdtar; /* UNUSED */ 177 178 reader_options = getenv(ENV_READER_OPTIONS); 179 if (reader_options != NULL) { 180 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; 181 size_t opt_len = strlen(reader_options) + 1; 182 char *p; 183 /* Set default write options. */ 184 if ((p = malloc(module_len + opt_len)) == NULL) 185 if (p == NULL) 186 lafe_errc(1, errno, "Out of memory"); 187 /* Prepend magic code to ignore options for 188 * a format or filters which are not added to 189 * the archive write object. */ 190 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); 191 memcpy(p, reader_options, opt_len); 192 r = archive_read_set_options(a, p); 193 free(p); 194 if (r < ARCHIVE_WARN) 195 lafe_errc(1, 0, "%s", archive_error_string(a)); 196 else 197 archive_clear_error(a); 198 } 199} 200 201void 202tar_mode_c(struct bsdtar *bsdtar) 203{ 204 struct archive *a; 205 const void *filter_name; 206 int r; 207 208 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) 209 lafe_errc(1, 0, "no files or directories specified"); 210 211 a = archive_write_new(); 212 213 /* Support any format that the library supports. */ 214 if (cset_get_format(bsdtar->cset) == NULL) { 215 r = archive_write_set_format_pax_restricted(a); 216 cset_set_format(bsdtar->cset, "pax restricted"); 217 } else { 218 r = archive_write_set_format_by_name(a, 219 cset_get_format(bsdtar->cset)); 220 } 221 if (r != ARCHIVE_OK) { 222 fprintf(stderr, "Can't use format %s: %s\n", 223 cset_get_format(bsdtar->cset), 224 archive_error_string(a)); 225 usage(); 226 } 227 228 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); 229 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block); 230 231 r = cset_write_add_filters(bsdtar->cset, a, &filter_name); 232 if (r < ARCHIVE_WARN) { 233 lafe_errc(1, 0, "Unsupported compression option --%s", 234 (const char *)filter_name); 235 } 236 237 set_writer_options(bsdtar, a); 238 if (bsdtar->passphrase != NULL) 239 r = archive_write_set_passphrase(a, bsdtar->passphrase); 240 else 241 r = archive_write_set_passphrase_callback(a, bsdtar, 242 &passphrase_callback); 243 if (r != ARCHIVE_OK) 244 lafe_errc(1, 0, "%s", archive_error_string(a)); 245 if (ARCHIVE_OK != archive_write_open_filename(a, bsdtar->filename)) 246 lafe_errc(1, 0, "%s", archive_error_string(a)); 247 write_archive(a, bsdtar); 248} 249 250/* 251 * Same as 'c', except we only support tar or empty formats in 252 * uncompressed files on disk. 253 */ 254void 255tar_mode_r(struct bsdtar *bsdtar) 256{ 257 int64_t end_offset; 258 int format; 259 struct archive *a; 260 struct archive_entry *entry; 261 int r; 262 263 /* Sanity-test some arguments and the file. */ 264 test_for_append(bsdtar); 265 266 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 267 268#if defined(__BORLANDC__) 269 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY); 270#else 271 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY, 0666); 272#endif 273 if (bsdtar->fd < 0) 274 lafe_errc(1, errno, 275 "Cannot open %s", bsdtar->filename); 276 277 a = archive_read_new(); 278 archive_read_support_filter_all(a); 279 archive_read_support_format_empty(a); 280 archive_read_support_format_tar(a); 281 archive_read_support_format_gnutar(a); 282 set_reader_options(bsdtar, a); 283 r = archive_read_open_fd(a, bsdtar->fd, 10240); 284 if (r != ARCHIVE_OK) 285 lafe_errc(1, archive_errno(a), 286 "Can't read archive %s: %s", bsdtar->filename, 287 archive_error_string(a)); 288 while (0 == archive_read_next_header(a, &entry)) { 289 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) { 290 archive_read_free(a); 291 close(bsdtar->fd); 292 lafe_errc(1, 0, 293 "Cannot append to compressed archive."); 294 } 295 /* Keep going until we hit end-of-archive */ 296 format = archive_format(a); 297 } 298 299 end_offset = archive_read_header_position(a); 300 archive_read_free(a); 301 302 /* Re-open archive for writing */ 303 a = archive_write_new(); 304 /* 305 * Set the format to be used for writing. To allow people to 306 * extend empty files, we need to allow them to specify the format, 307 * which opens the possibility that they will specify a format that 308 * doesn't match the existing format. Hence, the following bit 309 * of arcane ugliness. 310 */ 311 312 if (cset_get_format(bsdtar->cset) != NULL) { 313 /* If the user requested a format, use that, but ... */ 314 archive_write_set_format_by_name(a, 315 cset_get_format(bsdtar->cset)); 316 /* ... complain if it's not compatible. */ 317 format &= ARCHIVE_FORMAT_BASE_MASK; 318 if (format != (int)(archive_format(a) & ARCHIVE_FORMAT_BASE_MASK) 319 && format != ARCHIVE_FORMAT_EMPTY) { 320 lafe_errc(1, 0, 321 "Format %s is incompatible with the archive %s.", 322 cset_get_format(bsdtar->cset), bsdtar->filename); 323 } 324 } else { 325 /* 326 * Just preserve the current format, with a little care 327 * for formats that libarchive can't write. 328 */ 329 if (format == ARCHIVE_FORMAT_EMPTY) 330 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 331 archive_write_set_format(a, format); 332 } 333 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0) 334 lafe_errc(1, errno, "Could not seek to archive end"); 335 set_writer_options(bsdtar, a); 336 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) 337 lafe_errc(1, 0, "%s", archive_error_string(a)); 338 339 write_archive(a, bsdtar); /* XXX check return val XXX */ 340 341 close(bsdtar->fd); 342 bsdtar->fd = -1; 343} 344 345void 346tar_mode_u(struct bsdtar *bsdtar) 347{ 348 int64_t end_offset; 349 struct archive *a; 350 struct archive_entry *entry; 351 int format; 352 struct archive_dir_entry *p; 353 struct archive_dir archive_dir; 354 355 bsdtar->archive_dir = &archive_dir; 356 memset(&archive_dir, 0, sizeof(archive_dir)); 357 358 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; 359 360 /* Sanity-test some arguments and the file. */ 361 test_for_append(bsdtar); 362 363 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_BINARY); 364 if (bsdtar->fd < 0) 365 lafe_errc(1, errno, 366 "Cannot open %s", bsdtar->filename); 367 368 a = archive_read_new(); 369 archive_read_support_filter_all(a); 370 archive_read_support_format_tar(a); 371 archive_read_support_format_gnutar(a); 372 set_reader_options(bsdtar, a); 373 if (archive_read_open_fd(a, bsdtar->fd, bsdtar->bytes_per_block) 374 != ARCHIVE_OK) { 375 lafe_errc(1, 0, 376 "Can't open %s: %s", bsdtar->filename, 377 archive_error_string(a)); 378 } 379 380 /* Build a list of all entries and their recorded mod times. */ 381 while (0 == archive_read_next_header(a, &entry)) { 382 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) { 383 archive_read_free(a); 384 close(bsdtar->fd); 385 lafe_errc(1, 0, 386 "Cannot append to compressed archive."); 387 } 388 if (archive_match_exclude_entry(bsdtar->matching, 389 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER | 390 ARCHIVE_MATCH_EQUAL, entry) != ARCHIVE_OK) 391 lafe_errc(1, 0, "Error : %s", 392 archive_error_string(bsdtar->matching)); 393 /* Record the last format determination we see */ 394 format = archive_format(a); 395 /* Keep going until we hit end-of-archive */ 396 } 397 398 end_offset = archive_read_header_position(a); 399 archive_read_free(a); 400 401 /* Re-open archive for writing. */ 402 a = archive_write_new(); 403 /* 404 * Set format to same one auto-detected above. 405 */ 406 archive_write_set_format(a, format); 407 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); 408 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block); 409 410 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0) 411 lafe_errc(1, errno, "Could not seek to archive end"); 412 set_writer_options(bsdtar, a); 413 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) 414 lafe_errc(1, 0, "%s", archive_error_string(a)); 415 416 write_archive(a, bsdtar); 417 418 close(bsdtar->fd); 419 bsdtar->fd = -1; 420 421 while (bsdtar->archive_dir->head != NULL) { 422 p = bsdtar->archive_dir->head->next; 423 free(bsdtar->archive_dir->head->name); 424 free(bsdtar->archive_dir->head); 425 bsdtar->archive_dir->head = p; 426 } 427 bsdtar->archive_dir->tail = NULL; 428} 429 430 431/* 432 * Write user-specified files/dirs to opened archive. 433 */ 434static void 435write_archive(struct archive *a, struct bsdtar *bsdtar) 436{ 437 const char *arg; 438 struct archive_entry *entry, *sparse_entry; 439 440 /* Choose a suitable copy buffer size */ 441 bsdtar->buff_size = 64 * 1024; 442 while (bsdtar->buff_size < (size_t)bsdtar->bytes_per_block) 443 bsdtar->buff_size *= 2; 444 /* Try to compensate for space we'll lose to alignment. */ 445 bsdtar->buff_size += 16 * 1024; 446 447 /* Allocate a buffer for file data. */ 448 if ((bsdtar->buff = malloc(bsdtar->buff_size)) == NULL) 449 lafe_errc(1, 0, "cannot allocate memory"); 450 451 if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL) 452 lafe_errc(1, 0, "cannot create link resolver"); 453 archive_entry_linkresolver_set_strategy(bsdtar->resolver, 454 archive_format(a)); 455 456 /* Create a read_disk object. */ 457 if ((bsdtar->diskreader = archive_read_disk_new()) == NULL) 458 lafe_errc(1, 0, "Cannot create read_disk object"); 459 /* Tell the read_disk how handle symlink. */ 460 switch (bsdtar->symlink_mode) { 461 case 'H': 462 archive_read_disk_set_symlink_hybrid(bsdtar->diskreader); 463 break; 464 case 'L': 465 archive_read_disk_set_symlink_logical(bsdtar->diskreader); 466 break; 467 default: 468 archive_read_disk_set_symlink_physical(bsdtar->diskreader); 469 break; 470 } 471 /* Register entry filters. */ 472 archive_read_disk_set_matching(bsdtar->diskreader, 473 bsdtar->matching, excluded_callback, bsdtar); 474 archive_read_disk_set_metadata_filter_callback( 475 bsdtar->diskreader, metadata_filter, bsdtar); 476 /* Set the behavior of archive_read_disk. */ 477 archive_read_disk_set_behavior(bsdtar->diskreader, 478 bsdtar->readdisk_flags); 479 archive_read_disk_set_standard_lookup(bsdtar->diskreader); 480 481 if (bsdtar->names_from_file != NULL) 482 archive_names_from_file(bsdtar, a); 483 484 while (*bsdtar->argv) { 485 arg = *bsdtar->argv; 486 if (arg[0] == '-' && arg[1] == 'C') { 487 arg += 2; 488 if (*arg == '\0') { 489 bsdtar->argv++; 490 arg = *bsdtar->argv; 491 if (arg == NULL) { 492 lafe_warnc(0, "%s", 493 "Missing argument for -C"); 494 bsdtar->return_value = 1; 495 goto cleanup; 496 } 497 if (*arg == '\0') { 498 lafe_warnc(0, 499 "Meaningless argument for -C: ''"); 500 bsdtar->return_value = 1; 501 goto cleanup; 502 } 503 } 504 set_chdir(bsdtar, arg); 505 } else { 506 if (*arg != '/') 507 do_chdir(bsdtar); /* Handle a deferred -C */ 508 if (*arg == '@') { 509 if (append_archive_filename(bsdtar, a, 510 arg + 1) != 0) 511 break; 512 } else 513 write_hierarchy(bsdtar, a, arg); 514 } 515 bsdtar->argv++; 516 } 517 518 archive_read_disk_set_matching(bsdtar->diskreader, NULL, NULL, NULL); 519 archive_read_disk_set_metadata_filter_callback( 520 bsdtar->diskreader, NULL, NULL); 521 entry = NULL; 522 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); 523 while (entry != NULL) { 524 int r; 525 struct archive_entry *entry2; 526 struct archive *disk = bsdtar->diskreader; 527 528 /* 529 * This tricky code here is to correctly read the contents 530 * of the entry because the disk reader bsdtar->diskreader 531 * is pointing at does not have any information about the 532 * entry by this time and using archive_read_data_block() 533 * with the disk reader consequently must fail. And we 534 * have to re-open the entry to read the contents. 535 */ 536 /* TODO: Work with -C option as well. */ 537 r = archive_read_disk_open(disk, 538 archive_entry_sourcepath(entry)); 539 if (r != ARCHIVE_OK) { 540 lafe_warnc(archive_errno(disk), 541 "%s", archive_error_string(disk)); 542 bsdtar->return_value = 1; 543 goto next_entry; 544 } 545 546 /* 547 * Invoke archive_read_next_header2() to work 548 * archive_read_data_block(), which is called via write_file(), 549 * without failure. 550 */ 551 entry2 = archive_entry_new(); 552 r = archive_read_next_header2(disk, entry2); 553 archive_entry_free(entry2); 554 if (r != ARCHIVE_OK) { 555 lafe_warnc(archive_errno(disk), 556 "%s", archive_error_string(disk)); 557 if (r == ARCHIVE_FATAL) 558 bsdtar->return_value = 1; 559 archive_read_close(disk); 560 goto next_entry; 561 } 562 563 write_file(bsdtar, a, entry); 564 archive_read_close(disk); 565next_entry: 566 archive_entry_free(entry); 567 entry = NULL; 568 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); 569 } 570 571 if (archive_write_close(a)) { 572 lafe_warnc(0, "%s", archive_error_string(a)); 573 bsdtar->return_value = 1; 574 } 575 576cleanup: 577 /* Free file data buffer. */ 578 free(bsdtar->buff); 579 archive_entry_linkresolver_free(bsdtar->resolver); 580 bsdtar->resolver = NULL; 581 archive_read_free(bsdtar->diskreader); 582 bsdtar->diskreader = NULL; 583 584 if (bsdtar->flags & OPTFLAG_TOTALS) { 585 fprintf(stderr, "Total bytes written: %s\n", 586 tar_i64toa(archive_filter_bytes(a, -1))); 587 } 588 589 archive_write_free(a); 590} 591 592/* 593 * Archive names specified in file. 594 * 595 * Unless --null was specified, a line containing exactly "-C" will 596 * cause the next line to be a directory to pass to chdir(). If 597 * --null is specified, then a line "-C" is just another filename. 598 */ 599static void 600archive_names_from_file(struct bsdtar *bsdtar, struct archive *a) 601{ 602 struct lafe_line_reader *lr; 603 const char *line; 604 605 bsdtar->next_line_is_dir = 0; 606 607 lr = lafe_line_reader(bsdtar->names_from_file, 608 (bsdtar->flags & OPTFLAG_NULL)); 609 while ((line = lafe_line_reader_next(lr)) != NULL) { 610 if (bsdtar->next_line_is_dir) { 611 if (*line != '\0') 612 set_chdir(bsdtar, line); 613 else { 614 lafe_warnc(0, 615 "Meaningless argument for -C: ''"); 616 bsdtar->return_value = 1; 617 } 618 bsdtar->next_line_is_dir = 0; 619 } else if (((bsdtar->flags & OPTFLAG_NULL) == 0) && 620 strcmp(line, "-C") == 0) 621 bsdtar->next_line_is_dir = 1; 622 else { 623 if (*line != '/') 624 do_chdir(bsdtar); /* Handle a deferred -C */ 625 write_hierarchy(bsdtar, a, line); 626 } 627 } 628 lafe_line_reader_free(lr); 629 if (bsdtar->next_line_is_dir) 630 lafe_errc(1, errno, 631 "Unexpected end of filename list; " 632 "directory expected after -C"); 633} 634 635/* 636 * Copy from specified archive to current archive. Returns non-zero 637 * for write errors (which force us to terminate the entire archiving 638 * operation). If there are errors reading the input archive, we set 639 * bsdtar->return_value but return zero, so the overall archiving 640 * operation will complete and return non-zero. 641 */ 642static int 643append_archive_filename(struct bsdtar *bsdtar, struct archive *a, 644 const char *raw_filename) 645{ 646 struct archive *ina; 647 const char *filename = raw_filename; 648 int rc; 649 650 if (strcmp(filename, "-") == 0) 651 filename = NULL; /* Library uses NULL for stdio. */ 652 653 ina = archive_read_new(); 654 archive_read_support_format_all(ina); 655 archive_read_support_filter_all(ina); 656 set_reader_options(bsdtar, ina); 657 archive_read_set_options(ina, "mtree:checkfs"); 658 if (bsdtar->passphrase != NULL) 659 rc = archive_read_add_passphrase(a, bsdtar->passphrase); 660 else 661 rc = archive_read_set_passphrase_callback(ina, bsdtar, 662 &passphrase_callback); 663 if (rc != ARCHIVE_OK) 664 lafe_errc(1, 0, "%s", archive_error_string(a)); 665 if (archive_read_open_filename(ina, filename, 666 bsdtar->bytes_per_block)) { 667 lafe_warnc(0, "%s", archive_error_string(ina)); 668 bsdtar->return_value = 1; 669 return (0); 670 } 671 672 rc = append_archive(bsdtar, a, ina); 673 674 if (rc != ARCHIVE_OK) { 675 lafe_warnc(0, "Error reading archive %s: %s", 676 raw_filename, archive_error_string(ina)); 677 bsdtar->return_value = 1; 678 } 679 archive_read_free(ina); 680 681 return (rc); 682} 683 684static int 685append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina) 686{ 687 struct archive_entry *in_entry; 688 int e; 689 690 while (ARCHIVE_OK == (e = archive_read_next_header(ina, &in_entry))) { 691 if (archive_match_excluded(bsdtar->matching, in_entry)) 692 continue; 693 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 694 !yes("copy '%s'", archive_entry_pathname(in_entry))) 695 continue; 696 if (bsdtar->verbose > 1) { 697 safe_fprintf(stderr, "a "); 698 list_item_verbose(bsdtar, stderr, in_entry); 699 } else if (bsdtar->verbose > 0) 700 safe_fprintf(stderr, "a %s", 701 archive_entry_pathname(in_entry)); 702 if (need_report()) 703 report_write(bsdtar, a, in_entry, 0); 704 705 e = archive_write_header(a, in_entry); 706 if (e != ARCHIVE_OK) { 707 if (!bsdtar->verbose) 708 lafe_warnc(0, "%s: %s", 709 archive_entry_pathname(in_entry), 710 archive_error_string(a)); 711 else 712 fprintf(stderr, ": %s", archive_error_string(a)); 713 } 714 if (e == ARCHIVE_FATAL) 715 exit(1); 716 717 if (e >= ARCHIVE_WARN) { 718 if (archive_entry_size(in_entry) == 0) 719 archive_read_data_skip(ina); 720 else if (copy_file_data_block(bsdtar, a, ina, in_entry)) 721 exit(1); 722 } 723 724 if (bsdtar->verbose) 725 fprintf(stderr, "\n"); 726 } 727 728 return (e == ARCHIVE_EOF ? ARCHIVE_OK : e); 729} 730 731/* Helper function to copy file to archive. */ 732static int 733copy_file_data_block(struct bsdtar *bsdtar, struct archive *a, 734 struct archive *in_a, struct archive_entry *entry) 735{ 736 size_t bytes_read; 737 ssize_t bytes_written; 738 int64_t offset, progress = 0; 739 char *null_buff = NULL; 740 const void *buff; 741 int r; 742 743 while ((r = archive_read_data_block(in_a, &buff, 744 &bytes_read, &offset)) == ARCHIVE_OK) { 745 if (need_report()) 746 report_write(bsdtar, a, entry, progress); 747 748 if (offset > progress) { 749 int64_t sparse = offset - progress; 750 size_t ns; 751 752 if (null_buff == NULL) { 753 null_buff = bsdtar->buff; 754 memset(null_buff, 0, bsdtar->buff_size); 755 } 756 757 while (sparse > 0) { 758 if (sparse > (int64_t)bsdtar->buff_size) 759 ns = bsdtar->buff_size; 760 else 761 ns = (size_t)sparse; 762 bytes_written = 763 archive_write_data(a, null_buff, ns); 764 if (bytes_written < 0) { 765 /* Write failed; this is bad */ 766 lafe_warnc(0, "%s", 767 archive_error_string(a)); 768 return (-1); 769 } 770 if ((size_t)bytes_written < ns) { 771 /* Write was truncated; warn but 772 * continue. */ 773 lafe_warnc(0, 774 "%s: Truncated write; file may " 775 "have grown while being archived.", 776 archive_entry_pathname(entry)); 777 return (0); 778 } 779 progress += bytes_written; 780 sparse -= bytes_written; 781 } 782 } 783 784 bytes_written = archive_write_data(a, buff, bytes_read); 785 if (bytes_written < 0) { 786 /* Write failed; this is bad */ 787 lafe_warnc(0, "%s", archive_error_string(a)); 788 return (-1); 789 } 790 if ((size_t)bytes_written < bytes_read) { 791 /* Write was truncated; warn but continue. */ 792 lafe_warnc(0, 793 "%s: Truncated write; file may have grown " 794 "while being archived.", 795 archive_entry_pathname(entry)); 796 return (0); 797 } 798 progress += bytes_written; 799 } 800 if (r < ARCHIVE_WARN) { 801 lafe_warnc(archive_errno(a), "%s", archive_error_string(a)); 802 return (-1); 803 } 804 return (0); 805} 806 807static void 808excluded_callback(struct archive *a, void *_data, struct archive_entry *entry) 809{ 810 struct bsdtar *bsdtar = (struct bsdtar *)_data; 811 812 if (bsdtar->flags & OPTFLAG_NO_SUBDIRS) 813 return; 814 if (!archive_read_disk_can_descend(a)) 815 return; 816 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 817 !yes("add '%s'", archive_entry_pathname(entry))) 818 return; 819 archive_read_disk_descend(a); 820} 821 822static int 823metadata_filter(struct archive *a, void *_data, struct archive_entry *entry) 824{ 825 struct bsdtar *bsdtar = (struct bsdtar *)_data; 826 827 /* XXX TODO: check whether this filesystem is 828 * synthetic and/or local. Add a new 829 * --local-only option to skip non-local 830 * filesystems. Skip synthetic filesystems 831 * regardless. 832 * 833 * The results should be cached, since 834 * tree.c doesn't usually visit a directory 835 * and the directory contents together. A simple 836 * move-to-front list should perform quite well. 837 * 838 * Use archive_read_disk_current_filesystem_is_remote(). 839 */ 840 841 /* 842 * If the user vetoes this file/directory, skip it. 843 * We want this to be fairly late; if some other 844 * check would veto this file, we shouldn't bother 845 * the user with it. 846 */ 847 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 848 !yes("add '%s'", archive_entry_pathname(entry))) 849 return (0); 850 851 /* Note: if user vetoes, we won't descend. */ 852 if (((bsdtar->flags & OPTFLAG_NO_SUBDIRS) == 0) && 853 archive_read_disk_can_descend(a)) 854 archive_read_disk_descend(a); 855 856 return (1); 857} 858 859/* 860 * Add the file or dir hierarchy named by 'path' to the archive 861 */ 862static void 863write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path) 864{ 865 struct archive *disk = bsdtar->diskreader; 866 struct archive_entry *entry = NULL, *spare_entry = NULL; 867 int r; 868 869 r = archive_read_disk_open(disk, path); 870 if (r != ARCHIVE_OK) { 871 lafe_warnc(archive_errno(disk), 872 "%s", archive_error_string(disk)); 873 bsdtar->return_value = 1; 874 return; 875 } 876 bsdtar->first_fs = -1; 877 878 for (;;) { 879 archive_entry_free(entry); 880 entry = archive_entry_new(); 881 r = archive_read_next_header2(disk, entry); 882 if (r == ARCHIVE_EOF) 883 break; 884 else if (r != ARCHIVE_OK) { 885 lafe_warnc(archive_errno(disk), 886 "%s", archive_error_string(disk)); 887 if (r == ARCHIVE_FATAL || r == ARCHIVE_FAILED) { 888 bsdtar->return_value = 1; 889 archive_entry_free(entry); 890 archive_read_close(disk); 891 return; 892 } else if (r < ARCHIVE_WARN) 893 continue; 894 } 895 896 if (bsdtar->uid >= 0) { 897 archive_entry_set_uid(entry, bsdtar->uid); 898 if (!bsdtar->uname) 899 archive_entry_set_uname(entry, 900 archive_read_disk_uname(bsdtar->diskreader, 901 bsdtar->uid)); 902 } 903 if (bsdtar->gid >= 0) { 904 archive_entry_set_gid(entry, bsdtar->gid); 905 if (!bsdtar->gname) 906 archive_entry_set_gname(entry, 907 archive_read_disk_gname(bsdtar->diskreader, 908 bsdtar->gid)); 909 } 910 if (bsdtar->uname) 911 archive_entry_set_uname(entry, bsdtar->uname); 912 if (bsdtar->gname) 913 archive_entry_set_gname(entry, bsdtar->gname); 914 915 /* 916 * Rewrite the pathname to be archived. If rewrite 917 * fails, skip the entry. 918 */ 919 if (edit_pathname(bsdtar, entry)) 920 continue; 921 922 /* Display entry as we process it. */ 923 if (bsdtar->verbose > 1) { 924 safe_fprintf(stderr, "a "); 925 list_item_verbose(bsdtar, stderr, entry); 926 } else if (bsdtar->verbose > 0) { 927 /* This format is required by SUSv2. */ 928 safe_fprintf(stderr, "a %s", 929 archive_entry_pathname(entry)); 930 } 931 932 /* Non-regular files get archived with zero size. */ 933 if (archive_entry_filetype(entry) != AE_IFREG) 934 archive_entry_set_size(entry, 0); 935 936 archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry); 937 938 while (entry != NULL) { 939 write_file(bsdtar, a, entry); 940 archive_entry_free(entry); 941 entry = spare_entry; 942 spare_entry = NULL; 943 } 944 945 if (bsdtar->verbose) 946 fprintf(stderr, "\n"); 947 } 948 archive_entry_free(entry); 949 archive_read_close(disk); 950} 951 952/* 953 * Write a single file (or directory or other filesystem object) to 954 * the archive. 955 */ 956static void 957write_file(struct bsdtar *bsdtar, struct archive *a, 958 struct archive_entry *entry) 959{ 960 write_entry(bsdtar, a, entry); 961} 962 963/* 964 * Write a single entry to the archive. 965 */ 966static void 967write_entry(struct bsdtar *bsdtar, struct archive *a, 968 struct archive_entry *entry) 969{ 970 int e; 971 972 e = archive_write_header(a, entry); 973 if (e != ARCHIVE_OK) { 974 if (bsdtar->verbose > 1) { 975 safe_fprintf(stderr, "a "); 976 list_item_verbose(bsdtar, stderr, entry); 977 lafe_warnc(0, ": %s", archive_error_string(a)); 978 } else if (bsdtar->verbose > 0) { 979 lafe_warnc(0, "%s: %s", 980 archive_entry_pathname(entry), 981 archive_error_string(a)); 982 } else 983 fprintf(stderr, ": %s", archive_error_string(a)); 984 } 985 986 if (e == ARCHIVE_FATAL) 987 exit(1); 988 989 /* 990 * If we opened a file earlier, write it out now. Note that 991 * the format handler might have reset the size field to zero 992 * to inform us that the archive body won't get stored. In 993 * that case, just skip the write. 994 */ 995 if (e >= ARCHIVE_WARN && archive_entry_size(entry) > 0) { 996 if (copy_file_data_block(bsdtar, a, bsdtar->diskreader, entry)) 997 exit(1); 998 } 999} 1000 1001static void 1002report_write(struct bsdtar *bsdtar, struct archive *a, 1003 struct archive_entry *entry, int64_t progress) 1004{ 1005 uint64_t comp, uncomp; 1006 int compression; 1007 1008 if (bsdtar->verbose) 1009 fprintf(stderr, "\n"); 1010 comp = archive_filter_bytes(a, -1); 1011 uncomp = archive_filter_bytes(a, 0); 1012 fprintf(stderr, "In: %d files, %s bytes;", 1013 archive_file_count(a), tar_i64toa(uncomp)); 1014 if (comp >= uncomp) 1015 compression = 0; 1016 else 1017 compression = (int)((uncomp - comp) * 100 / uncomp); 1018 fprintf(stderr, 1019 " Out: %s bytes, compression %d%%\n", 1020 tar_i64toa(comp), compression); 1021 /* Can't have two calls to tar_i64toa() pending, so split the output. */ 1022 safe_fprintf(stderr, "Current: %s (%s", 1023 archive_entry_pathname(entry), 1024 tar_i64toa(progress)); 1025 fprintf(stderr, "/%s bytes)\n", 1026 tar_i64toa(archive_entry_size(entry))); 1027} 1028 1029static void 1030test_for_append(struct bsdtar *bsdtar) 1031{ 1032 struct stat s; 1033 1034 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) 1035 lafe_errc(1, 0, "no files or directories specified"); 1036 if (bsdtar->filename == NULL) 1037 lafe_errc(1, 0, "Cannot append to stdout."); 1038 1039 if (stat(bsdtar->filename, &s) != 0) 1040 return; 1041 1042 if (!S_ISREG(s.st_mode) && !S_ISBLK(s.st_mode)) 1043 lafe_errc(1, 0, 1044 "Cannot append to %s: not a regular file.", 1045 bsdtar->filename); 1046 1047/* Is this an appropriate check here on Windows? */ 1048/* 1049 if (GetFileType(handle) != FILE_TYPE_DISK) 1050 lafe_errc(1, 0, "Cannot append"); 1051*/ 1052 1053} 1054