4 * Support for extracting WIM images, or files or directories contained in a WIM
9 * Copyright (C) 2012, 2013, 2014, 2015 Eric Biggers
11 * This file is free software; you can redistribute it and/or modify it under
12 * the terms of the GNU Lesser General Public License as published by the Free
13 * Software Foundation; either version 3 of the License, or (at your option) any
16 * This file is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this file; if not, see http://www.gnu.org/licenses/.
26 * This file provides the API functions wimlib_extract_image(),
27 * wimlib_extract_image_from_pipe(), wimlib_extract_paths(), and
28 * wimlib_extract_pathlist(). Internally, all end up calling
29 * do_wimlib_extract_paths() and extract_trees().
31 * Although wimlib supports multiple extraction modes/backends (NTFS-3g, UNIX,
32 * Win32), this file does not itself have code to extract files or directories
33 * to any specific target; instead, it handles generic functionality and relies
34 * on lower-level callback functions declared in `struct apply_operations' to do
35 * the actual extraction.
47 #include "wimlib/apply.h"
48 #include "wimlib/assert.h"
49 #include "wimlib/blob_table.h"
50 #include "wimlib/dentry.h"
51 #include "wimlib/encoding.h"
52 #include "wimlib/endianness.h"
53 #include "wimlib/error.h"
54 #include "wimlib/metadata.h"
55 #include "wimlib/pathlist.h"
56 #include "wimlib/paths.h"
57 #include "wimlib/pattern.h"
58 #include "wimlib/reparse.h"
59 #include "wimlib/resource.h"
60 #include "wimlib/security.h"
61 #include "wimlib/unix_data.h"
62 #include "wimlib/wim.h"
63 #include "wimlib/win32.h" /* for realpath() equivalent */
64 #include "wimlib/xml.h"
66 #define WIMLIB_EXTRACT_FLAG_FROM_PIPE 0x80000000
67 #define WIMLIB_EXTRACT_FLAG_IMAGEMODE 0x40000000
69 /* Keep in sync with wimlib.h */
70 #define WIMLIB_EXTRACT_MASK_PUBLIC \
71 (WIMLIB_EXTRACT_FLAG_NTFS | \
72 WIMLIB_EXTRACT_FLAG_UNIX_DATA | \
73 WIMLIB_EXTRACT_FLAG_NO_ACLS | \
74 WIMLIB_EXTRACT_FLAG_STRICT_ACLS | \
75 WIMLIB_EXTRACT_FLAG_RPFIX | \
76 WIMLIB_EXTRACT_FLAG_NORPFIX | \
77 WIMLIB_EXTRACT_FLAG_TO_STDOUT | \
78 WIMLIB_EXTRACT_FLAG_REPLACE_INVALID_FILENAMES | \
79 WIMLIB_EXTRACT_FLAG_ALL_CASE_CONFLICTS | \
80 WIMLIB_EXTRACT_FLAG_STRICT_TIMESTAMPS | \
81 WIMLIB_EXTRACT_FLAG_STRICT_SHORT_NAMES | \
82 WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS | \
83 WIMLIB_EXTRACT_FLAG_GLOB_PATHS | \
84 WIMLIB_EXTRACT_FLAG_STRICT_GLOB | \
85 WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES | \
86 WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE | \
87 WIMLIB_EXTRACT_FLAG_WIMBOOT | \
88 WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS4K | \
89 WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS8K | \
90 WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS16K | \
91 WIMLIB_EXTRACT_FLAG_COMPACT_LZX \
94 /* Send WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE or
95 * WIMLIB_PROGRESS_MSG_EXTRACT_METADATA. */
97 do_file_extract_progress(struct apply_ctx *ctx, enum wimlib_progress_msg msg)
99 ctx->count_until_file_progress = 500; /* Arbitrary value to limit calls */
100 return extract_progress(ctx, msg);
104 start_file_phase(struct apply_ctx *ctx, u64 end_file_count, enum wimlib_progress_msg msg)
106 ctx->progress.extract.current_file_count = 0;
107 ctx->progress.extract.end_file_count = end_file_count;
108 return do_file_extract_progress(ctx, msg);
112 start_file_structure_phase(struct apply_ctx *ctx, u64 end_file_count)
114 return start_file_phase(ctx, end_file_count, WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE);
118 start_file_metadata_phase(struct apply_ctx *ctx, u64 end_file_count)
120 return start_file_phase(ctx, end_file_count, WIMLIB_PROGRESS_MSG_EXTRACT_METADATA);
124 end_file_phase(struct apply_ctx *ctx, enum wimlib_progress_msg msg)
126 ctx->progress.extract.current_file_count = ctx->progress.extract.end_file_count;
127 return do_file_extract_progress(ctx, msg);
131 end_file_structure_phase(struct apply_ctx *ctx)
133 return end_file_phase(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE);
137 end_file_metadata_phase(struct apply_ctx *ctx)
139 return end_file_phase(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_METADATA);
142 #define PWM_FOUND_WIM_HDR (-1)
144 /* Read the header for a blob in a pipable WIM. If @pwm_hdr_ret is not NULL,
145 * also look for a pipable WIM header and return PWM_FOUND_WIM_HDR if found. */
147 read_pwm_blob_header(WIMStruct *pwm, u8 hash_ret[SHA1_HASH_SIZE],
148 struct wim_reshdr *reshdr_ret,
149 struct wim_header_disk *pwm_hdr_ret)
152 struct pwm_blob_hdr blob_hdr;
155 ret = full_read(&pwm->in_fd, &blob_hdr, sizeof(blob_hdr));
159 magic = le64_to_cpu(blob_hdr.magic);
161 if (magic == PWM_MAGIC && pwm_hdr_ret != NULL) {
162 memcpy(pwm_hdr_ret, &blob_hdr, sizeof(blob_hdr));
163 ret = full_read(&pwm->in_fd,
164 (u8 *)pwm_hdr_ret + sizeof(blob_hdr),
165 sizeof(*pwm_hdr_ret) - sizeof(blob_hdr));
168 return PWM_FOUND_WIM_HDR;
171 if (unlikely(magic != PWM_BLOB_MAGIC)) {
172 ERROR("Data read on pipe is invalid (expected blob header)");
173 return WIMLIB_ERR_INVALID_PIPABLE_WIM;
176 copy_hash(hash_ret, blob_hdr.hash);
178 reshdr_ret->size_in_wim = 0; /* Not available */
179 reshdr_ret->flags = le32_to_cpu(blob_hdr.flags);
180 reshdr_ret->offset_in_wim = pwm->in_fd.offset;
181 reshdr_ret->uncompressed_size = le64_to_cpu(blob_hdr.uncompressed_size);
183 if (unlikely(reshdr_ret->uncompressed_size == 0)) {
184 ERROR("Data read on pipe is invalid (resource is of 0 size)");
185 return WIMLIB_ERR_INVALID_PIPABLE_WIM;
191 if (ret == WIMLIB_ERR_UNEXPECTED_END_OF_FILE)
192 ERROR("The pipe ended before all needed data was sent!");
194 ERROR_WITH_ERRNO("Error reading pipable WIM from pipe");
199 read_blobs_from_pipe(struct apply_ctx *ctx, const struct read_blob_callbacks *cbs)
202 u8 hash[SHA1_HASH_SIZE];
203 struct wim_reshdr reshdr;
204 struct wim_header_disk pwm_hdr;
205 struct wim_resource_descriptor rdesc;
206 struct blob_descriptor *blob;
208 copy_guid(ctx->progress.extract.guid, ctx->wim->hdr.guid);
209 ctx->progress.extract.part_number = ctx->wim->hdr.part_number;
210 ctx->progress.extract.total_parts = ctx->wim->hdr.total_parts;
211 ret = extract_progress(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_SPWM_PART_BEGIN);
215 while (ctx->num_blobs_remaining) {
217 ret = read_pwm_blob_header(ctx->wim, hash, &reshdr, &pwm_hdr);
219 if (ret == PWM_FOUND_WIM_HDR) {
220 u16 part_number = le16_to_cpu(pwm_hdr.part_number);
221 u16 total_parts = le16_to_cpu(pwm_hdr.total_parts);
223 if (part_number == ctx->progress.extract.part_number &&
224 total_parts == ctx->progress.extract.total_parts &&
225 guids_equal(pwm_hdr.guid, ctx->progress.extract.guid))
228 copy_guid(ctx->progress.extract.guid, pwm_hdr.guid);
229 ctx->progress.extract.part_number = part_number;
230 ctx->progress.extract.total_parts = total_parts;
231 ret = extract_progress(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_SPWM_PART_BEGIN);
241 if (!(reshdr.flags & WIM_RESHDR_FLAG_METADATA)
242 && (blob = lookup_blob(ctx->wim->blob_table, hash))
243 && (blob->out_refcnt))
245 wim_reshdr_to_desc_and_blob(&reshdr, ctx->wim, &rdesc, blob);
246 ret = read_blob_with_sha1(blob, cbs);
247 blob_unset_is_located_in_wim_resource(blob);
250 ctx->num_blobs_remaining--;
252 wim_reshdr_to_desc(&reshdr, ctx->wim, &rdesc);
253 ret = skip_wim_resource(&rdesc);
262 /* Creates a temporary file opened for writing. The open file descriptor is
263 * returned in @fd_ret and its name is returned in @name_ret (dynamically
266 create_temporary_file(struct filedes *fd_ret, tchar **name_ret)
273 name = ttempnam(NULL, T("wimlib"));
275 ERROR_WITH_ERRNO("Failed to create temporary filename");
276 return WIMLIB_ERR_NOMEM;
279 open_flags = O_WRONLY | O_CREAT | O_EXCL | O_BINARY;
281 open_flags |= _O_SHORT_LIVED;
283 raw_fd = topen(name, open_flags, 0600);
286 if (errno == EEXIST) {
290 ERROR_WITH_ERRNO("Failed to create temporary file "
293 return WIMLIB_ERR_OPEN;
296 filedes_init(fd_ret, raw_fd);
302 begin_extract_blob_wrapper(struct blob_descriptor *blob, void *_ctx)
304 struct apply_ctx *ctx = _ctx;
306 ctx->cur_blob = blob;
307 ctx->cur_blob_offset = 0;
309 if (unlikely(blob->out_refcnt > MAX_OPEN_FILES))
310 return create_temporary_file(&ctx->tmpfile_fd, &ctx->tmpfile_name);
312 return call_begin_blob(blob, ctx->saved_cbs);
316 extract_chunk_wrapper(const void *chunk, size_t size, void *_ctx)
318 struct apply_ctx *ctx = _ctx;
319 union wimlib_progress_info *progress = &ctx->progress;
322 ctx->cur_blob_offset += size;
324 if (likely(ctx->supported_features.hard_links)) {
325 progress->extract.completed_bytes +=
326 (u64)size * ctx->cur_blob->out_refcnt;
327 if (ctx->cur_blob_offset == ctx->cur_blob->size)
328 progress->extract.completed_streams += ctx->cur_blob->out_refcnt;
330 const struct blob_extraction_target *targets =
331 blob_extraction_targets(ctx->cur_blob);
332 for (u32 i = 0; i < ctx->cur_blob->out_refcnt; i++) {
333 const struct wim_inode *inode = targets[i].inode;
334 const struct wim_dentry *dentry;
336 inode_for_each_extraction_alias(dentry, inode) {
337 progress->extract.completed_bytes += size;
338 if (ctx->cur_blob_offset == ctx->cur_blob->size)
339 progress->extract.completed_streams++;
343 if (progress->extract.completed_bytes >= ctx->next_progress) {
345 ret = extract_progress(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS);
349 set_next_progress(progress->extract.completed_bytes,
350 progress->extract.total_bytes,
351 &ctx->next_progress);
354 if (unlikely(filedes_valid(&ctx->tmpfile_fd))) {
355 /* Just extracting to temporary file for now. */
356 ret = full_write(&ctx->tmpfile_fd, chunk, size);
358 ERROR_WITH_ERRNO("Error writing data to "
359 "temporary file \"%"TS"\"",
365 return call_consume_chunk(chunk, size, ctx->saved_cbs);
368 /* Copy the blob's data from the temporary file to each of its targets.
370 * This is executed only in the very uncommon case that a blob is being
371 * extracted to more than MAX_OPEN_FILES targets! */
373 extract_from_tmpfile(const tchar *tmpfile_name,
374 const struct blob_descriptor *orig_blob,
375 const struct read_blob_callbacks *cbs)
377 struct blob_descriptor tmpfile_blob;
378 const struct blob_extraction_target *targets = blob_extraction_targets(orig_blob);
381 memcpy(&tmpfile_blob, orig_blob, sizeof(struct blob_descriptor));
382 tmpfile_blob.blob_location = BLOB_IN_FILE_ON_DISK;
383 tmpfile_blob.file_on_disk = (tchar *)tmpfile_name;
384 tmpfile_blob.out_refcnt = 1;
386 for (u32 i = 0; i < orig_blob->out_refcnt; i++) {
387 tmpfile_blob.inline_blob_extraction_targets[0] = targets[i];
388 ret = read_blob_with_cbs(&tmpfile_blob, cbs);
396 end_extract_blob_wrapper(struct blob_descriptor *blob, int status, void *_ctx)
398 struct apply_ctx *ctx = _ctx;
400 if (unlikely(filedes_valid(&ctx->tmpfile_fd))) {
401 filedes_close(&ctx->tmpfile_fd);
403 status = extract_from_tmpfile(ctx->tmpfile_name, blob,
405 filedes_invalidate(&ctx->tmpfile_fd);
406 tunlink(ctx->tmpfile_name);
407 FREE(ctx->tmpfile_name);
411 return call_end_blob(blob, status, ctx->saved_cbs);
415 * Read the list of blobs to extract and feed their data into the specified
416 * callback functions.
418 * This handles checksumming each blob.
420 * This also handles sending WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS.
422 * This also works if the WIM is being read from a pipe.
424 * This also will split up blobs that will need to be extracted to more than
425 * MAX_OPEN_FILES locations, as measured by the 'out_refcnt' of each blob.
426 * Therefore, the apply_operations implementation need not worry about running
427 * out of file descriptors, unless it might open more than one file descriptor
428 * per 'blob_extraction_target' (e.g. Win32 currently might because the
429 * destination file system might not support hard links).
432 extract_blob_list(struct apply_ctx *ctx, const struct read_blob_callbacks *cbs)
434 struct read_blob_callbacks wrapper_cbs = {
435 .begin_blob = begin_extract_blob_wrapper,
436 .consume_chunk = extract_chunk_wrapper,
437 .end_blob = end_extract_blob_wrapper,
440 ctx->saved_cbs = cbs;
441 if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE) {
442 return read_blobs_from_pipe(ctx, &wrapper_cbs);
444 return read_blob_list(&ctx->blob_list,
445 offsetof(struct blob_descriptor,
447 &wrapper_cbs, VERIFY_BLOB_HASHES);
451 /* Extract a WIM dentry to standard output.
453 * This obviously doesn't make sense in all cases. We return an error if the
454 * dentry does not correspond to a regular file. Otherwise we extract the
455 * unnamed data stream only. */
457 extract_dentry_to_stdout(struct wim_dentry *dentry,
458 const struct blob_table *blob_table)
460 struct wim_inode *inode = dentry->d_inode;
461 struct blob_descriptor *blob;
462 struct filedes _stdout;
464 if (inode->i_attributes & (FILE_ATTRIBUTE_REPARSE_POINT |
465 FILE_ATTRIBUTE_DIRECTORY |
466 FILE_ATTRIBUTE_ENCRYPTED))
468 ERROR("\"%"TS"\" is not a regular file and therefore cannot be "
469 "extracted to standard output", dentry_full_path(dentry));
470 return WIMLIB_ERR_NOT_A_REGULAR_FILE;
473 blob = inode_get_blob_for_unnamed_data_stream(inode, blob_table);
475 const u8 *hash = inode_get_hash_of_unnamed_data_stream(inode);
476 if (!is_zero_hash(hash))
477 return blob_not_found_error(inode, hash);
481 filedes_init(&_stdout, STDOUT_FILENO);
482 return extract_blob_to_fd(blob, &_stdout);
486 extract_dentries_to_stdout(struct wim_dentry **dentries, size_t num_dentries,
487 const struct blob_table *blob_table)
489 for (size_t i = 0; i < num_dentries; i++) {
490 int ret = extract_dentry_to_stdout(dentries[i], blob_table);
497 /**********************************************************************/
500 * Removes duplicate dentries from the array.
502 * Returns the new number of dentries, packed at the front of the array.
505 remove_duplicate_trees(struct wim_dentry **trees, size_t num_trees)
508 for (i = 0; i < num_trees; i++) {
509 if (!trees[i]->d_tmp_flag) {
510 /* Found distinct dentry. */
511 trees[i]->d_tmp_flag = 1;
512 trees[j++] = trees[i];
515 for (i = 0; i < j; i++)
516 trees[i]->d_tmp_flag = 0;
521 * Remove dentries that are descendants of other dentries in the array.
523 * Returns the new number of dentries, packed at the front of the array.
526 remove_contained_trees(struct wim_dentry **trees, size_t num_trees)
529 for (i = 0; i < num_trees; i++)
530 trees[i]->d_tmp_flag = 1;
531 for (i = 0; i < num_trees; i++) {
532 struct wim_dentry *d = trees[i];
533 while (!dentry_is_root(d)) {
538 trees[j++] = trees[i];
542 trees[i]->d_tmp_flag = 0;
545 for (i = 0; i < j; i++)
546 trees[i]->d_tmp_flag = 0;
551 dentry_append_to_list(struct wim_dentry *dentry, void *_dentry_list)
553 struct list_head *dentry_list = _dentry_list;
554 list_add_tail(&dentry->d_extraction_list_node, dentry_list);
559 dentry_reset_extraction_list_node(struct wim_dentry *dentry)
561 dentry->d_extraction_list_node = (struct list_head){NULL, NULL};
565 dentry_delete_from_list(struct wim_dentry *dentry, void *_ignore)
567 if (will_extract_dentry(dentry)) {
568 list_del(&dentry->d_extraction_list_node);
569 dentry_reset_extraction_list_node(dentry);
575 * Build the preliminary list of dentries to be extracted.
577 * The list maintains the invariant that if d1 and d2 are in the list and d1 is
578 * an ancestor of d2, then d1 appears before d2 in the list.
581 build_dentry_list(struct list_head *dentry_list, struct wim_dentry **trees,
582 size_t num_trees, bool add_ancestors)
584 INIT_LIST_HEAD(dentry_list);
586 /* Add the trees recursively. */
587 for (size_t i = 0; i < num_trees; i++)
588 for_dentry_in_tree(trees[i], dentry_append_to_list, dentry_list);
590 /* If requested, add ancestors of the trees. */
592 for (size_t i = 0; i < num_trees; i++) {
593 struct wim_dentry *dentry = trees[i];
594 struct wim_dentry *ancestor;
595 struct list_head *place_after;
597 if (dentry_is_root(dentry))
600 place_after = dentry_list;
603 ancestor = ancestor->d_parent;
604 if (will_extract_dentry(ancestor)) {
605 place_after = &ancestor->d_extraction_list_node;
608 } while (!dentry_is_root(ancestor));
612 ancestor = ancestor->d_parent;
613 if (will_extract_dentry(ancestor))
615 list_add(&ancestor->d_extraction_list_node, place_after);
616 } while (!dentry_is_root(ancestor));
622 destroy_dentry_list(struct list_head *dentry_list)
624 struct wim_dentry *dentry, *tmp;
625 struct wim_inode *inode;
627 list_for_each_entry_safe(dentry, tmp, dentry_list, d_extraction_list_node) {
628 inode = dentry->d_inode;
629 dentry_reset_extraction_list_node(dentry);
630 inode->i_visited = 0;
631 inode->i_can_externally_back = 0;
632 if ((void *)dentry->d_extraction_name != (void *)dentry->d_name)
633 FREE(dentry->d_extraction_name);
634 dentry->d_extraction_name = NULL;
635 dentry->d_extraction_name_nchars = 0;
640 destroy_blob_list(struct list_head *blob_list)
642 struct blob_descriptor *blob;
644 list_for_each_entry(blob, blob_list, extraction_list)
645 if (blob->out_refcnt > ARRAY_LEN(blob->inline_blob_extraction_targets))
646 FREE(blob->blob_extraction_targets);
650 static const utf16lechar replacement_char = cpu_to_le16(0xfffd);
652 static const utf16lechar replacement_char = cpu_to_le16('?');
656 file_name_valid(utf16lechar *name, size_t num_chars, bool fix)
662 for (i = 0; i < num_chars; i++) {
663 switch (le16_to_cpu(name[i])) {
665 case '\x01'...'\x1F':
678 name[i] = replacement_char;
688 dentry_calculate_extraction_name(struct wim_dentry *dentry,
689 struct apply_ctx *ctx)
693 if (dentry_is_root(dentry))
697 if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
698 dentry->d_extraction_name = dentry->d_name;
699 dentry->d_extraction_name_nchars = dentry->d_name_nbytes /
705 if (!ctx->supported_features.case_sensitive_filenames) {
706 struct wim_dentry *other;
707 list_for_each_entry(other, &dentry->d_ci_conflict_list,
710 if (will_extract_dentry(other)) {
711 if (ctx->extract_flags &
712 WIMLIB_EXTRACT_FLAG_ALL_CASE_CONFLICTS) {
713 WARNING("\"%"TS"\" has the same "
714 "case-insensitive name as "
715 "\"%"TS"\"; extracting "
716 "dummy name instead",
717 dentry_full_path(dentry),
718 dentry_full_path(other));
721 WARNING("Not extracting \"%"TS"\": "
722 "has same case-insensitive "
724 dentry_full_path(dentry),
725 dentry_full_path(other));
732 if (file_name_valid(dentry->d_name, dentry->d_name_nbytes / 2, false)) {
734 ret = utf16le_get_tstr(dentry->d_name,
735 dentry->d_name_nbytes,
736 (const tchar **)&dentry->d_extraction_name,
738 dentry->d_extraction_name_nchars = nbytes / sizeof(tchar);
741 if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_REPLACE_INVALID_FILENAMES)
743 WARNING("\"%"TS"\" has an invalid filename "
744 "that is not supported on this platform; "
745 "extracting dummy name instead",
746 dentry_full_path(dentry));
749 WARNING("Not extracting \"%"TS"\": has an invalid filename "
750 "that is not supported on this platform",
751 dentry_full_path(dentry));
758 utf16lechar utf16_name_copy[dentry->d_name_nbytes / 2];
760 memcpy(utf16_name_copy, dentry->d_name, dentry->d_name_nbytes);
761 file_name_valid(utf16_name_copy, dentry->d_name_nbytes / 2, true);
763 const tchar *tchar_name;
766 ret = utf16le_get_tstr(utf16_name_copy,
767 dentry->d_name_nbytes,
768 &tchar_name, &tchar_nchars);
772 tchar_nchars /= sizeof(tchar);
774 size_t fixed_name_num_chars = tchar_nchars;
775 tchar fixed_name[tchar_nchars + 50];
777 tmemcpy(fixed_name, tchar_name, tchar_nchars);
778 fixed_name_num_chars += tsprintf(fixed_name + tchar_nchars,
779 T(" (invalid filename #%lu)"),
780 ++ctx->invalid_sequence);
782 utf16le_put_tstr(tchar_name);
784 dentry->d_extraction_name = TSTRDUP(fixed_name);
785 if (!dentry->d_extraction_name)
786 return WIMLIB_ERR_NOMEM;
787 dentry->d_extraction_name_nchars = fixed_name_num_chars;
792 for_dentry_in_tree(dentry, dentry_delete_from_list, NULL);
797 * Calculate the actual filename component at which each WIM dentry will be
798 * extracted, with special handling for dentries that are unsupported by the
799 * extraction backend or have invalid names.
801 * ctx->supported_features must be filled in.
803 * Possible error codes: WIMLIB_ERR_NOMEM, WIMLIB_ERR_INVALID_UTF16_STRING
806 dentry_list_calculate_extraction_names(struct list_head *dentry_list,
807 struct apply_ctx *ctx)
809 struct list_head *prev, *cur;
811 /* Can't use list_for_each_entry() because a call to
812 * dentry_calculate_extraction_name() may delete the current dentry and
813 * its children from the list. */
817 struct wim_dentry *dentry;
821 if (cur == dentry_list)
824 dentry = list_entry(cur, struct wim_dentry, d_extraction_list_node);
826 ret = dentry_calculate_extraction_name(dentry, ctx);
830 if (prev->next == cur)
833 ; /* Current dentry and its children (which follow in
834 the list) were deleted. prev stays the same. */
840 dentry_resolve_streams(struct wim_dentry *dentry, int extract_flags,
841 struct blob_table *blob_table)
843 struct wim_inode *inode = dentry->d_inode;
844 struct blob_descriptor *blob;
848 /* Special case: when extracting from a pipe, the WIM blob table is
849 * initially empty, so "resolving" an inode's streams is initially not
850 * possible. However, we still need to keep track of which blobs,
851 * identified by SHA-1 message digests, need to be extracted, so we
852 * "resolve" the inode's streams anyway by allocating a 'struct
853 * blob_descriptor' for each one. */
854 if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE)
856 ret = inode_resolve_streams(inode, blob_table, force);
859 for (unsigned i = 0; i < inode->i_num_streams; i++) {
860 blob = stream_blob_resolved(&inode->i_streams[i]);
862 blob->out_refcnt = 0;
868 * For each dentry to be extracted, resolve all streams in the corresponding
869 * inode and set 'out_refcnt' in all referenced blob_descriptors to 0.
871 * Possible error codes: WIMLIB_ERR_RESOURCE_NOT_FOUND, WIMLIB_ERR_NOMEM.
874 dentry_list_resolve_streams(struct list_head *dentry_list,
875 struct apply_ctx *ctx)
877 struct wim_dentry *dentry;
880 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
881 ret = dentry_resolve_streams(dentry,
883 ctx->wim->blob_table);
891 ref_stream(struct wim_inode_stream *strm, struct wim_dentry *dentry,
892 struct apply_ctx *ctx)
894 struct wim_inode *inode = dentry->d_inode;
895 struct blob_descriptor *blob = stream_blob_resolved(strm);
896 struct blob_extraction_target *targets;
901 /* Tally the size only for each actual extraction of the stream (not
902 * additional hard links to the inode). */
903 if (inode->i_visited && ctx->supported_features.hard_links)
906 ctx->progress.extract.total_bytes += blob->size;
907 ctx->progress.extract.total_streams++;
909 if (inode->i_visited)
912 /* Add each blob to 'ctx->blob_list' only one time, regardless of how
913 * many extraction targets it will have. */
914 if (blob->out_refcnt == 0) {
915 list_add_tail(&blob->extraction_list, &ctx->blob_list);
916 ctx->num_blobs_remaining++;
919 /* Set this stream as an extraction target of 'blob'. */
921 if (blob->out_refcnt < ARRAY_LEN(blob->inline_blob_extraction_targets)) {
922 targets = blob->inline_blob_extraction_targets;
924 struct blob_extraction_target *prev_targets;
925 size_t alloc_blob_extraction_targets;
927 if (blob->out_refcnt == ARRAY_LEN(blob->inline_blob_extraction_targets)) {
929 alloc_blob_extraction_targets = ARRAY_LEN(blob->inline_blob_extraction_targets);
931 prev_targets = blob->blob_extraction_targets;
932 alloc_blob_extraction_targets = blob->alloc_blob_extraction_targets;
935 if (blob->out_refcnt == alloc_blob_extraction_targets) {
936 alloc_blob_extraction_targets *= 2;
937 targets = REALLOC(prev_targets,
938 alloc_blob_extraction_targets *
941 return WIMLIB_ERR_NOMEM;
944 blob->inline_blob_extraction_targets,
945 sizeof(blob->inline_blob_extraction_targets));
947 blob->blob_extraction_targets = targets;
948 blob->alloc_blob_extraction_targets = alloc_blob_extraction_targets;
950 targets = blob->blob_extraction_targets;
952 targets[blob->out_refcnt].inode = inode;
953 targets[blob->out_refcnt].stream = strm;
959 ref_stream_if_needed(struct wim_dentry *dentry, struct wim_inode *inode,
960 struct wim_inode_stream *strm, struct apply_ctx *ctx)
962 bool need_stream = false;
963 switch (strm->stream_type) {
964 case STREAM_TYPE_DATA:
965 if (stream_is_named(strm)) {
966 /* Named data stream */
967 if (ctx->supported_features.named_data_streams)
969 } else if (!(inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
970 FILE_ATTRIBUTE_ENCRYPTED))
971 && !(inode_is_symlink(inode)
972 && !ctx->supported_features.reparse_points
973 && ctx->supported_features.symlink_reparse_points))
976 * Unnamed data stream. Skip if any of the following is true:
978 * - file is a directory
979 * - file is encrypted
980 * - backend needs to create the file as UNIX symlink
981 * - backend will extract the stream as externally
982 * backed from the WIM archive itself
984 if (ctx->apply_ops->will_back_from_wim) {
985 int ret = (*ctx->apply_ops->will_back_from_wim)(dentry, ctx);
986 if (ret > 0) /* Error? */
988 if (ret < 0) /* Won't externally back? */
995 case STREAM_TYPE_REPARSE_POINT:
996 wimlib_assert(inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT);
997 if (ctx->supported_features.reparse_points ||
998 (inode_is_symlink(inode) &&
999 ctx->supported_features.symlink_reparse_points))
1002 case STREAM_TYPE_EFSRPC_RAW_DATA:
1003 wimlib_assert(inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED);
1004 if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
1005 if (ctx->supported_features.encrypted_directories)
1008 if (ctx->supported_features.encrypted_files)
1014 return ref_stream(strm, dentry, ctx);
1019 dentry_ref_streams(struct wim_dentry *dentry, struct apply_ctx *ctx)
1021 struct wim_inode *inode = dentry->d_inode;
1022 for (unsigned i = 0; i < inode->i_num_streams; i++) {
1023 int ret = ref_stream_if_needed(dentry, inode,
1024 &inode->i_streams[i], ctx);
1028 inode->i_visited = 1;
1033 * Given a list of dentries to be extracted, build the list of blobs that need
1034 * to be extracted, and for each blob determine the streams to which that blob
1035 * will be extracted.
1037 * This also initializes the extract progress info with byte and blob
1040 * ctx->supported_features must be filled in.
1043 dentry_list_ref_streams(struct list_head *dentry_list, struct apply_ctx *ctx)
1045 struct wim_dentry *dentry;
1048 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
1049 ret = dentry_ref_streams(dentry, ctx);
1053 list_for_each_entry(dentry, dentry_list, d_extraction_list_node)
1054 dentry->d_inode->i_visited = 0;
1059 dentry_list_build_inode_alias_lists(struct list_head *dentry_list)
1061 struct wim_dentry *dentry;
1063 list_for_each_entry(dentry, dentry_list, d_extraction_list_node)
1064 dentry->d_inode->i_first_extraction_alias = NULL;
1066 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
1067 dentry->d_next_extraction_alias = dentry->d_inode->i_first_extraction_alias;
1068 dentry->d_inode->i_first_extraction_alias = dentry;
1073 inode_tally_features(const struct wim_inode *inode,
1074 struct wim_features *features)
1076 if (inode->i_attributes & FILE_ATTRIBUTE_ARCHIVE)
1077 features->archive_files++;
1078 if (inode->i_attributes & FILE_ATTRIBUTE_HIDDEN)
1079 features->hidden_files++;
1080 if (inode->i_attributes & FILE_ATTRIBUTE_SYSTEM)
1081 features->system_files++;
1082 if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED)
1083 features->compressed_files++;
1084 if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) {
1085 if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY)
1086 features->encrypted_directories++;
1088 features->encrypted_files++;
1090 if (inode->i_attributes & FILE_ATTRIBUTE_NOT_CONTENT_INDEXED)
1091 features->not_context_indexed_files++;
1092 if (inode->i_attributes & FILE_ATTRIBUTE_SPARSE_FILE)
1093 features->sparse_files++;
1094 if (inode_has_named_data_stream(inode))
1095 features->named_data_streams++;
1096 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
1097 features->reparse_points++;
1098 if (inode_is_symlink(inode))
1099 features->symlink_reparse_points++;
1101 features->other_reparse_points++;
1103 if (inode_has_security_descriptor(inode))
1104 features->security_descriptors++;
1105 if (inode_has_unix_data(inode))
1106 features->unix_data++;
1109 /* Tally features necessary to extract a dentry and the corresponding inode. */
1111 dentry_tally_features(struct wim_dentry *dentry, struct wim_features *features)
1113 struct wim_inode *inode = dentry->d_inode;
1115 if (dentry_has_short_name(dentry))
1116 features->short_names++;
1118 if (inode->i_visited) {
1119 features->hard_links++;
1121 inode_tally_features(inode, features);
1122 inode->i_visited = 1;
1126 /* Tally the features necessary to extract the specified dentries. */
1128 dentry_list_get_features(struct list_head *dentry_list,
1129 struct wim_features *features)
1131 struct wim_dentry *dentry;
1133 list_for_each_entry(dentry, dentry_list, d_extraction_list_node)
1134 dentry_tally_features(dentry, features);
1136 list_for_each_entry(dentry, dentry_list, d_extraction_list_node)
1137 dentry->d_inode->i_visited = 0;
1141 do_feature_check(const struct wim_features *required_features,
1142 const struct wim_features *supported_features,
1145 /* Encrypted files. */
1146 if (required_features->encrypted_files &&
1147 !supported_features->encrypted_files)
1148 WARNING("Ignoring EFS-encrypted data of %lu files",
1149 required_features->encrypted_files);
1151 /* Named data streams. */
1152 if (required_features->named_data_streams &&
1153 !supported_features->named_data_streams)
1154 WARNING("Ignoring named data streams of %lu files",
1155 required_features->named_data_streams);
1157 /* File attributes. */
1158 if (!(extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES)) {
1159 /* Note: Don't bother the user about FILE_ATTRIBUTE_ARCHIVE.
1160 * We're an archive program, so theoretically we can do what we
1163 if (required_features->hidden_files &&
1164 !supported_features->hidden_files)
1165 WARNING("Ignoring FILE_ATTRIBUTE_HIDDEN of %lu files",
1166 required_features->hidden_files);
1168 if (required_features->system_files &&
1169 !supported_features->system_files)
1170 WARNING("Ignoring FILE_ATTRIBUTE_SYSTEM of %lu files",
1171 required_features->system_files);
1173 if (required_features->compressed_files &&
1174 !supported_features->compressed_files)
1175 WARNING("Ignoring FILE_ATTRIBUTE_COMPRESSED of %lu files",
1176 required_features->compressed_files);
1178 if (required_features->not_context_indexed_files &&
1179 !supported_features->not_context_indexed_files)
1180 WARNING("Ignoring FILE_ATTRIBUTE_NOT_CONTENT_INDEXED of %lu files",
1181 required_features->not_context_indexed_files);
1183 if (required_features->sparse_files &&
1184 !supported_features->sparse_files)
1185 WARNING("Ignoring FILE_ATTRIBUTE_SPARSE_FILE of %lu files",
1186 required_features->sparse_files);
1188 if (required_features->encrypted_directories &&
1189 !supported_features->encrypted_directories)
1190 WARNING("Ignoring FILE_ATTRIBUTE_ENCRYPTED of %lu directories",
1191 required_features->encrypted_directories);
1195 if (required_features->hard_links && !supported_features->hard_links)
1196 WARNING("Extracting %lu hard links as independent files",
1197 required_features->hard_links);
1199 /* Symbolic links and reparse points. */
1200 if ((extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS) &&
1201 required_features->symlink_reparse_points &&
1202 !supported_features->symlink_reparse_points &&
1203 !supported_features->reparse_points)
1205 ERROR("Extraction backend does not support symbolic links!");
1206 return WIMLIB_ERR_UNSUPPORTED;
1208 if (required_features->reparse_points &&
1209 !supported_features->reparse_points)
1211 if (supported_features->symlink_reparse_points) {
1212 if (required_features->other_reparse_points) {
1213 WARNING("Ignoring reparse data of %lu non-symlink/junction files",
1214 required_features->other_reparse_points);
1217 WARNING("Ignoring reparse data of %lu files",
1218 required_features->reparse_points);
1222 /* Security descriptors. */
1223 if (((extract_flags & (WIMLIB_EXTRACT_FLAG_STRICT_ACLS |
1224 WIMLIB_EXTRACT_FLAG_UNIX_DATA))
1225 == WIMLIB_EXTRACT_FLAG_STRICT_ACLS) &&
1226 required_features->security_descriptors &&
1227 !supported_features->security_descriptors)
1229 ERROR("Extraction backend does not support security descriptors!");
1230 return WIMLIB_ERR_UNSUPPORTED;
1232 if (!(extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS) &&
1233 required_features->security_descriptors &&
1234 !supported_features->security_descriptors)
1235 WARNING("Ignoring Windows NT security descriptors of %lu files",
1236 required_features->security_descriptors);
1239 if ((extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) &&
1240 required_features->unix_data && !supported_features->unix_data)
1242 ERROR("Extraction backend does not support UNIX data!");
1243 return WIMLIB_ERR_UNSUPPORTED;
1246 if (required_features->unix_data &&
1247 !(extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA))
1249 WARNING("Ignoring UNIX metadata of %lu files",
1250 required_features->unix_data);
1254 if (required_features->short_names &&
1255 !supported_features->short_names)
1257 if (extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SHORT_NAMES) {
1258 ERROR("Extraction backend does not support DOS names!");
1259 return WIMLIB_ERR_UNSUPPORTED;
1261 WARNING("Ignoring DOS names of %lu files",
1262 required_features->short_names);
1266 if ((extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_TIMESTAMPS) &&
1267 !supported_features->timestamps)
1269 ERROR("Extraction backend does not support timestamps!");
1270 return WIMLIB_ERR_UNSUPPORTED;
1276 static const struct apply_operations *
1277 select_apply_operations(int extract_flags)
1280 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS)
1281 return &ntfs_3g_apply_ops;
1284 return &win32_apply_ops;
1286 return &unix_apply_ops;
1291 extract_trees(WIMStruct *wim, struct wim_dentry **trees, size_t num_trees,
1292 const tchar *target, int extract_flags)
1294 const struct apply_operations *ops;
1295 struct apply_ctx *ctx;
1297 LIST_HEAD(dentry_list);
1299 if (extract_flags & WIMLIB_EXTRACT_FLAG_TO_STDOUT) {
1300 ret = extract_dentries_to_stdout(trees, num_trees,
1305 num_trees = remove_duplicate_trees(trees, num_trees);
1306 num_trees = remove_contained_trees(trees, num_trees);
1308 ops = select_apply_operations(extract_flags);
1310 if (num_trees > 1 && ops->single_tree_only) {
1311 ERROR("Extracting multiple directory trees "
1312 "at once is not supported in %s extraction mode!",
1314 ret = WIMLIB_ERR_UNSUPPORTED;
1318 ctx = CALLOC(1, ops->context_size);
1320 ret = WIMLIB_ERR_NOMEM;
1325 ctx->target = target;
1326 ctx->target_nchars = tstrlen(target);
1327 ctx->extract_flags = extract_flags;
1328 if (ctx->wim->progfunc) {
1329 ctx->progfunc = ctx->wim->progfunc;
1330 ctx->progctx = ctx->wim->progctx;
1331 ctx->progress.extract.image = wim->current_image;
1332 ctx->progress.extract.extract_flags = (extract_flags &
1333 WIMLIB_EXTRACT_MASK_PUBLIC);
1334 ctx->progress.extract.wimfile_name = wim->filename;
1335 ctx->progress.extract.image_name = wimlib_get_image_name(wim,
1336 wim->current_image);
1337 ctx->progress.extract.target = target;
1339 INIT_LIST_HEAD(&ctx->blob_list);
1340 filedes_invalidate(&ctx->tmpfile_fd);
1341 ctx->apply_ops = ops;
1343 ret = (*ops->get_supported_features)(target, &ctx->supported_features);
1347 build_dentry_list(&dentry_list, trees, num_trees,
1349 WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE));
1351 dentry_list_get_features(&dentry_list, &ctx->required_features);
1353 ret = do_feature_check(&ctx->required_features, &ctx->supported_features,
1354 ctx->extract_flags);
1358 ret = dentry_list_calculate_extraction_names(&dentry_list, ctx);
1362 if (unlikely(list_empty(&dentry_list))) {
1363 WARNING("There is nothing to extract!");
1367 ret = dentry_list_resolve_streams(&dentry_list, ctx);
1371 dentry_list_build_inode_alias_lists(&dentry_list);
1373 ret = dentry_list_ref_streams(&dentry_list, ctx);
1377 if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE) {
1378 /* When extracting from a pipe, the number of bytes of data to
1379 * extract can't be determined in the normal way (examining the
1380 * blob table), since at this point all we have is a set of
1381 * SHA-1 message digests of blobs that need to be extracted.
1382 * However, we can get a reasonably accurate estimate by taking
1383 * <TOTALBYTES> from the corresponding <IMAGE> in the WIM XML
1384 * data. This does assume that a full image is being extracted,
1385 * but currently there is no API for doing otherwise. (Also,
1386 * subtract <HARDLINKBYTES> from this if hard links are
1387 * supported by the extraction mode.) */
1388 ctx->progress.extract.total_bytes =
1389 xml_get_image_total_bytes(wim->xml_info,
1390 wim->current_image);
1391 if (ctx->supported_features.hard_links) {
1392 ctx->progress.extract.total_bytes -=
1393 xml_get_image_hard_link_bytes(wim->xml_info,
1394 wim->current_image);
1398 ret = extract_progress(ctx,
1399 ((extract_flags & WIMLIB_EXTRACT_FLAG_IMAGEMODE) ?
1400 WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN :
1401 WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN));
1405 ret = (*ops->extract)(&dentry_list, ctx);
1409 if (ctx->progress.extract.completed_bytes <
1410 ctx->progress.extract.total_bytes)
1412 ctx->progress.extract.completed_bytes =
1413 ctx->progress.extract.total_bytes;
1414 ret = extract_progress(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS);
1419 ret = extract_progress(ctx,
1420 ((extract_flags & WIMLIB_EXTRACT_FLAG_IMAGEMODE) ?
1421 WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END :
1422 WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END));
1424 destroy_blob_list(&ctx->blob_list);
1425 destroy_dentry_list(&dentry_list);
1432 mkdir_if_needed(const tchar *target)
1434 if (!tmkdir(target, 0755))
1437 if (errno == EEXIST)
1441 /* _wmkdir() fails with EACCES if called on a drive root directory. */
1442 if (errno == EACCES)
1446 ERROR_WITH_ERRNO("Failed to create directory \"%"TS"\"", target);
1447 return WIMLIB_ERR_MKDIR;
1450 /* Make sure the extraction flags make sense, and update them if needed. */
1452 check_extract_flags(const WIMStruct *wim, int *extract_flags_p)
1454 int extract_flags = *extract_flags_p;
1456 /* Check for invalid flag combinations */
1458 if ((extract_flags &
1459 (WIMLIB_EXTRACT_FLAG_NO_ACLS |
1460 WIMLIB_EXTRACT_FLAG_STRICT_ACLS)) == (WIMLIB_EXTRACT_FLAG_NO_ACLS |
1461 WIMLIB_EXTRACT_FLAG_STRICT_ACLS))
1462 return WIMLIB_ERR_INVALID_PARAM;
1464 if ((extract_flags &
1465 (WIMLIB_EXTRACT_FLAG_RPFIX |
1466 WIMLIB_EXTRACT_FLAG_NORPFIX)) == (WIMLIB_EXTRACT_FLAG_RPFIX |
1467 WIMLIB_EXTRACT_FLAG_NORPFIX))
1468 return WIMLIB_ERR_INVALID_PARAM;
1470 #ifndef WITH_NTFS_3G
1471 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
1472 ERROR("wimlib was compiled without support for NTFS-3g, so\n"
1473 " it cannot apply a WIM image directly to an NTFS volume.");
1474 return WIMLIB_ERR_UNSUPPORTED;
1478 if (extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT) {
1481 return WIMLIB_ERR_NO_FILENAME;
1483 ERROR("WIMBoot extraction is only supported on Windows!");
1484 return WIMLIB_ERR_UNSUPPORTED;
1488 if (extract_flags & (WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS4K |
1489 WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS8K |
1490 WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS16K |
1491 WIMLIB_EXTRACT_FLAG_COMPACT_LZX))
1495 count += ((extract_flags & WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS4K) != 0);
1496 count += ((extract_flags & WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS8K) != 0);
1497 count += ((extract_flags & WIMLIB_EXTRACT_FLAG_COMPACT_XPRESS16K) != 0);
1498 count += ((extract_flags & WIMLIB_EXTRACT_FLAG_COMPACT_LZX) != 0);
1500 ERROR("Only one compression format can be specified "
1501 "for compact-mode extraction!");
1502 return WIMLIB_ERR_INVALID_PARAM;
1504 if (extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT) {
1505 ERROR("Compact-mode extraction and WIMBoot-mode "
1506 "extraction are mutually exclusive!");
1507 return WIMLIB_ERR_INVALID_PARAM;
1510 ERROR("Compact-mode extraction (System Compression) "
1511 "is only supported on Windows!");
1512 return WIMLIB_ERR_UNSUPPORTED;
1517 if ((extract_flags & (WIMLIB_EXTRACT_FLAG_RPFIX |
1518 WIMLIB_EXTRACT_FLAG_NORPFIX |
1519 WIMLIB_EXTRACT_FLAG_IMAGEMODE)) ==
1520 WIMLIB_EXTRACT_FLAG_IMAGEMODE)
1522 /* For full-image extraction, do reparse point fixups by default
1523 * if the WIM header says they are enabled. */
1524 if (wim->hdr.flags & WIM_HDR_FLAG_RP_FIX)
1525 extract_flags |= WIMLIB_EXTRACT_FLAG_RPFIX;
1528 *extract_flags_p = extract_flags;
1532 struct append_dentry_ctx {
1533 struct wim_dentry **dentries;
1534 size_t num_dentries;
1535 size_t num_alloc_dentries;
1539 append_dentry_cb(struct wim_dentry *dentry, void *_ctx)
1541 struct append_dentry_ctx *ctx = _ctx;
1543 if (ctx->num_dentries == ctx->num_alloc_dentries) {
1544 struct wim_dentry **new_dentries;
1547 new_length = max(ctx->num_alloc_dentries + 8,
1548 ctx->num_alloc_dentries * 3 / 2);
1549 new_dentries = REALLOC(ctx->dentries,
1550 new_length * sizeof(ctx->dentries[0]));
1551 if (new_dentries == NULL)
1552 return WIMLIB_ERR_NOMEM;
1553 ctx->dentries = new_dentries;
1554 ctx->num_alloc_dentries = new_length;
1556 ctx->dentries[ctx->num_dentries++] = dentry;
1560 /* Append dentries matched by a path which can contain wildcard characters. */
1562 append_matched_dentries(WIMStruct *wim, const tchar *orig_pattern,
1563 int extract_flags, struct append_dentry_ctx *ctx)
1565 const size_t count_before = ctx->num_dentries;
1569 pattern = canonicalize_wim_path(orig_pattern);
1571 return WIMLIB_ERR_NOMEM;
1572 ret = expand_path_pattern(wim_get_current_root_dentry(wim), pattern,
1573 append_dentry_cb, ctx);
1575 if (ret || ctx->num_dentries > count_before)
1577 if (extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_GLOB) {
1578 ERROR("No matches for path pattern \"%"TS"\"", orig_pattern);
1579 return WIMLIB_ERR_PATH_DOES_NOT_EXIST;
1581 WARNING("No matches for path pattern \"%"TS"\"", orig_pattern);
1586 do_wimlib_extract_paths(WIMStruct *wim, int image, const tchar *target,
1587 const tchar * const *paths, size_t num_paths,
1591 struct wim_dentry **trees;
1594 if (wim == NULL || target == NULL || target[0] == T('\0') ||
1595 (num_paths != 0 && paths == NULL))
1596 return WIMLIB_ERR_INVALID_PARAM;
1598 ret = check_extract_flags(wim, &extract_flags);
1602 ret = select_wim_image(wim, image);
1606 ret = wim_checksum_unhashed_blobs(wim);
1610 if ((extract_flags & (WIMLIB_EXTRACT_FLAG_NTFS |
1611 WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE)) ==
1612 (WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE))
1614 ret = mkdir_if_needed(target);
1619 if (extract_flags & WIMLIB_EXTRACT_FLAG_GLOB_PATHS) {
1621 struct append_dentry_ctx append_dentry_ctx = {
1624 .num_alloc_dentries = 0,
1627 for (size_t i = 0; i < num_paths; i++) {
1628 ret = append_matched_dentries(wim, paths[i],
1630 &append_dentry_ctx);
1632 trees = append_dentry_ctx.dentries;
1633 goto out_free_trees;
1636 trees = append_dentry_ctx.dentries;
1637 num_trees = append_dentry_ctx.num_dentries;
1639 trees = MALLOC(num_paths * sizeof(trees[0]));
1641 return WIMLIB_ERR_NOMEM;
1643 for (size_t i = 0; i < num_paths; i++) {
1645 tchar *path = canonicalize_wim_path(paths[i]);
1647 ret = WIMLIB_ERR_NOMEM;
1648 goto out_free_trees;
1651 trees[i] = get_dentry(wim, path,
1652 WIMLIB_CASE_PLATFORM_DEFAULT);
1654 if (trees[i] == NULL) {
1655 ERROR("Path \"%"TS"\" does not exist "
1657 paths[i], wim->current_image);
1658 ret = WIMLIB_ERR_PATH_DOES_NOT_EXIST;
1659 goto out_free_trees;
1662 num_trees = num_paths;
1665 if (num_trees == 0) {
1667 goto out_free_trees;
1670 ret = extract_trees(wim, trees, num_trees, target, extract_flags);
1677 extract_single_image(WIMStruct *wim, int image,
1678 const tchar *target, int extract_flags)
1680 const tchar *path = WIMLIB_WIM_ROOT_PATH;
1681 extract_flags |= WIMLIB_EXTRACT_FLAG_IMAGEMODE;
1682 return do_wimlib_extract_paths(wim, image, target, &path, 1, extract_flags);
1685 static const tchar * const filename_forbidden_chars =
1694 /* This function checks if it is okay to use a WIM image's name as a directory
1697 image_name_ok_as_dir(const tchar *image_name)
1699 return image_name && *image_name &&
1700 !tstrpbrk(image_name, filename_forbidden_chars) &&
1701 tstrcmp(image_name, T(".")) &&
1702 tstrcmp(image_name, T("..")) &&
1703 tstrlen(image_name) <= 128;
1706 /* Extracts all images from the WIM to the directory @target, with the images
1707 * placed in subdirectories named by their image names. */
1709 extract_all_images(WIMStruct *wim, const tchar *target, int extract_flags)
1711 size_t output_path_len = tstrlen(target);
1712 tchar buf[output_path_len + 1 + 128 + 1];
1715 const tchar *image_name;
1717 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
1718 ERROR("Cannot extract multiple images in NTFS extraction mode.");
1719 return WIMLIB_ERR_INVALID_PARAM;
1722 ret = mkdir_if_needed(target);
1725 tmemcpy(buf, target, output_path_len);
1726 buf[output_path_len] = OS_PREFERRED_PATH_SEPARATOR;
1727 for (image = 1; image <= wim->hdr.image_count; image++) {
1728 image_name = wimlib_get_image_name(wim, image);
1729 if (image_name_ok_as_dir(image_name)) {
1730 tstrcpy(buf + output_path_len + 1, image_name);
1732 /* Image name is empty or contains forbidden characters.
1733 * Use image number instead. */
1734 tsprintf(buf + output_path_len + 1, T("%d"), image);
1736 ret = extract_single_image(wim, image, buf, extract_flags);
1744 do_wimlib_extract_image(WIMStruct *wim, int image, const tchar *target,
1747 if (extract_flags & (WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE |
1748 WIMLIB_EXTRACT_FLAG_TO_STDOUT |
1749 WIMLIB_EXTRACT_FLAG_GLOB_PATHS))
1750 return WIMLIB_ERR_INVALID_PARAM;
1752 if (image == WIMLIB_ALL_IMAGES)
1753 return extract_all_images(wim, target, extract_flags);
1755 return extract_single_image(wim, image, target, extract_flags);
1759 /****************************************************************************
1761 ****************************************************************************/
1764 wimlib_extract_paths(WIMStruct *wim, int image, const tchar *target,
1765 const tchar * const *paths, size_t num_paths,
1768 if (extract_flags & ~WIMLIB_EXTRACT_MASK_PUBLIC)
1769 return WIMLIB_ERR_INVALID_PARAM;
1771 return do_wimlib_extract_paths(wim, image, target, paths, num_paths,
1776 wimlib_extract_pathlist(WIMStruct *wim, int image, const tchar *target,
1777 const tchar *path_list_file, int extract_flags)
1784 ret = read_path_list_file(path_list_file, &paths, &num_paths, &mem);
1786 ERROR("Failed to read path list file \"%"TS"\"",
1791 ret = wimlib_extract_paths(wim, image, target,
1792 (const tchar * const *)paths, num_paths,
1800 wimlib_extract_image_from_pipe_with_progress(int pipe_fd,
1801 const tchar *image_num_or_name,
1802 const tchar *target,
1804 wimlib_progress_func_t progfunc,
1809 struct filedes *in_fd;
1813 if (extract_flags & ~WIMLIB_EXTRACT_MASK_PUBLIC)
1814 return WIMLIB_ERR_INVALID_PARAM;
1816 /* Read the WIM header from the pipe and get a WIMStruct to represent
1817 * the pipable WIM. Caveats: Unlike getting a WIMStruct with
1818 * wimlib_open_wim(), getting a WIMStruct in this way will result in an
1819 * empty blob table, no XML data read, and no filename set. */
1820 ret = open_wim_as_WIMStruct(&pipe_fd, WIMLIB_OPEN_FLAG_FROM_PIPE, &pwm,
1825 /* Sanity check to make sure this is a pipable WIM. */
1826 if (pwm->hdr.magic != PWM_MAGIC) {
1827 ERROR("The WIM being read from file descriptor %d "
1828 "is not pipable!", pipe_fd);
1829 ret = WIMLIB_ERR_NOT_PIPABLE;
1830 goto out_wimlib_free;
1833 /* Sanity check to make sure the first part of a pipable split WIM is
1834 * sent over the pipe first. */
1835 if (pwm->hdr.part_number != 1) {
1836 ERROR("The first part of the split WIM must be "
1837 "sent over the pipe first.");
1838 ret = WIMLIB_ERR_INVALID_PIPABLE_WIM;
1839 goto out_wimlib_free;
1842 in_fd = &pwm->in_fd;
1843 wimlib_assert(in_fd->offset == WIM_HEADER_DISK_SIZE);
1845 /* As mentioned, the WIMStruct we created from the pipe does not have
1846 * XML data yet. Fix this by reading the extra copy of the XML data
1847 * that directly follows the header in pipable WIMs. (Note: see
1848 * write_pipable_wim() for more details about the format of pipable
1851 u8 hash[SHA1_HASH_SIZE];
1853 ret = read_pwm_blob_header(pwm, hash,
1854 &pwm->hdr.xml_data_reshdr, NULL);
1856 goto out_wimlib_free;
1858 if (!(pwm->hdr.xml_data_reshdr.flags & WIM_RESHDR_FLAG_METADATA)) {
1859 ERROR("Expected XML data, but found non-metadata resource.");
1860 ret = WIMLIB_ERR_INVALID_PIPABLE_WIM;
1861 goto out_wimlib_free;
1864 ret = read_wim_xml_data(pwm);
1866 goto out_wimlib_free;
1868 if (xml_get_image_count(pwm->xml_info) != pwm->hdr.image_count) {
1869 ERROR("Image count in XML data is not the same as in WIM header.");
1870 ret = WIMLIB_ERR_IMAGE_COUNT;
1871 goto out_wimlib_free;
1875 /* Get image index (this may use the XML data that was just read to
1876 * resolve an image name). */
1877 if (image_num_or_name) {
1878 image = wimlib_resolve_image(pwm, image_num_or_name);
1879 if (image == WIMLIB_NO_IMAGE) {
1880 ERROR("\"%"TS"\" is not a valid image in the pipable WIM!",
1882 ret = WIMLIB_ERR_INVALID_IMAGE;
1883 goto out_wimlib_free;
1884 } else if (image == WIMLIB_ALL_IMAGES) {
1885 ERROR("Applying all images from a pipe is not supported!");
1886 ret = WIMLIB_ERR_INVALID_IMAGE;
1887 goto out_wimlib_free;
1890 if (pwm->hdr.image_count != 1) {
1891 ERROR("No image was specified, but the pipable WIM "
1892 "did not contain exactly 1 image");
1893 ret = WIMLIB_ERR_INVALID_IMAGE;
1894 goto out_wimlib_free;
1899 /* Load the needed metadata resource. */
1900 for (i = 1; i <= pwm->hdr.image_count; i++) {
1901 struct wim_image_metadata *imd;
1902 struct wim_reshdr reshdr;
1903 struct wim_resource_descriptor *metadata_rdesc;
1905 imd = pwm->image_metadata[i - 1];
1907 ret = WIMLIB_ERR_NOMEM;
1908 imd->metadata_blob = new_blob_descriptor();
1909 if (!imd->metadata_blob)
1910 goto out_wimlib_free;
1912 imd->metadata_blob->is_metadata = 1;
1914 ret = read_pwm_blob_header(pwm, imd->metadata_blob->hash,
1917 goto out_wimlib_free;
1919 if (!(reshdr.flags & WIM_RESHDR_FLAG_METADATA)) {
1920 ERROR("Expected metadata resource, but found "
1921 "non-metadata resource");
1922 ret = WIMLIB_ERR_INVALID_PIPABLE_WIM;
1923 goto out_wimlib_free;
1926 ret = WIMLIB_ERR_NOMEM;
1927 metadata_rdesc = MALLOC(sizeof(struct wim_resource_descriptor));
1928 if (!metadata_rdesc)
1929 goto out_wimlib_free;
1930 wim_reshdr_to_desc_and_blob(&reshdr, pwm, metadata_rdesc,
1931 imd->metadata_blob);
1935 /* Metadata resource is for the image being extracted.
1936 * Parse it and save the metadata in memory. */
1937 ret = read_metadata_resource(imd);
1939 goto out_wimlib_free;
1941 /* Metadata resource is not for the image being
1942 * extracted. Skip over it. */
1943 ret = skip_wim_resource(metadata_rdesc);
1945 goto out_wimlib_free;
1948 /* Extract the image. */
1949 extract_flags |= WIMLIB_EXTRACT_FLAG_FROM_PIPE;
1950 ret = do_wimlib_extract_image(pwm, image, target, extract_flags);
1951 /* Clean up and return. */
1959 wimlib_extract_image_from_pipe(int pipe_fd, const tchar *image_num_or_name,
1960 const tchar *target, int extract_flags)
1962 return wimlib_extract_image_from_pipe_with_progress(pipe_fd,
1971 wimlib_extract_image(WIMStruct *wim, int image, const tchar *target,
1974 if (extract_flags & ~WIMLIB_EXTRACT_MASK_PUBLIC)
1975 return WIMLIB_ERR_INVALID_PARAM;
1976 return do_wimlib_extract_image(wim, image, target, extract_flags);