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/reparse.h"
58 #include "wimlib/resource.h"
59 #include "wimlib/security.h"
60 #include "wimlib/unix_data.h"
61 #include "wimlib/wildcard.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)
89 /* Send WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE or
90 * WIMLIB_PROGRESS_MSG_EXTRACT_METADATA. */
92 do_file_extract_progress(struct apply_ctx *ctx, enum wimlib_progress_msg msg)
94 ctx->count_until_file_progress = 500; /* Arbitrary value to limit calls */
95 return extract_progress(ctx, msg);
99 start_file_phase(struct apply_ctx *ctx, u64 end_file_count, enum wimlib_progress_msg msg)
101 ctx->progress.extract.current_file_count = 0;
102 ctx->progress.extract.end_file_count = end_file_count;
103 return do_file_extract_progress(ctx, msg);
107 start_file_structure_phase(struct apply_ctx *ctx, u64 end_file_count)
109 return start_file_phase(ctx, end_file_count, WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE);
113 start_file_metadata_phase(struct apply_ctx *ctx, u64 end_file_count)
115 return start_file_phase(ctx, end_file_count, WIMLIB_PROGRESS_MSG_EXTRACT_METADATA);
119 end_file_phase(struct apply_ctx *ctx, enum wimlib_progress_msg msg)
121 ctx->progress.extract.current_file_count = ctx->progress.extract.end_file_count;
122 return do_file_extract_progress(ctx, msg);
126 end_file_structure_phase(struct apply_ctx *ctx)
128 return end_file_phase(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE);
132 end_file_metadata_phase(struct apply_ctx *ctx)
134 return end_file_phase(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_METADATA);
137 #define PWM_FOUND_WIM_HDR (-1)
139 /* Read the header for a blob in a pipable WIM. If @pwm_hdr_ret is not NULL,
140 * also look for a pipable WIM header and return PWM_FOUND_WIM_HDR if found. */
142 read_pwm_blob_header(WIMStruct *pwm, u8 hash_ret[SHA1_HASH_SIZE],
143 struct wim_reshdr *reshdr_ret,
144 struct wim_header_disk *pwm_hdr_ret)
147 struct pwm_blob_hdr blob_hdr;
150 ret = full_read(&pwm->in_fd, &blob_hdr, sizeof(blob_hdr));
154 magic = le64_to_cpu(blob_hdr.magic);
156 if (magic == PWM_MAGIC && pwm_hdr_ret != NULL) {
157 memcpy(pwm_hdr_ret, &blob_hdr, sizeof(blob_hdr));
158 ret = full_read(&pwm->in_fd,
159 (u8 *)pwm_hdr_ret + sizeof(blob_hdr),
160 sizeof(*pwm_hdr_ret) - sizeof(blob_hdr));
163 return PWM_FOUND_WIM_HDR;
166 if (unlikely(magic != PWM_BLOB_MAGIC)) {
167 ERROR("Data read on pipe is invalid (expected blob header)");
168 return WIMLIB_ERR_INVALID_PIPABLE_WIM;
171 copy_hash(hash_ret, blob_hdr.hash);
173 reshdr_ret->size_in_wim = 0; /* Not available */
174 reshdr_ret->flags = le32_to_cpu(blob_hdr.flags);
175 reshdr_ret->offset_in_wim = pwm->in_fd.offset;
176 reshdr_ret->uncompressed_size = le64_to_cpu(blob_hdr.uncompressed_size);
178 if (unlikely(reshdr_ret->uncompressed_size == 0)) {
179 ERROR("Data read on pipe is invalid (resource is of 0 size)");
180 return WIMLIB_ERR_INVALID_PIPABLE_WIM;
186 if (ret == WIMLIB_ERR_UNEXPECTED_END_OF_FILE)
187 ERROR("The pipe ended before all needed data was sent!");
189 ERROR_WITH_ERRNO("Error reading pipable WIM from pipe");
194 read_blobs_from_pipe(struct apply_ctx *ctx, const struct read_blob_callbacks *cbs)
197 u8 hash[SHA1_HASH_SIZE];
198 struct wim_reshdr reshdr;
199 struct wim_header_disk pwm_hdr;
200 struct wim_resource_descriptor rdesc;
201 struct blob_descriptor *blob;
203 copy_guid(ctx->progress.extract.guid, ctx->wim->hdr.guid);
204 ctx->progress.extract.part_number = ctx->wim->hdr.part_number;
205 ctx->progress.extract.total_parts = ctx->wim->hdr.total_parts;
206 ret = extract_progress(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_SPWM_PART_BEGIN);
210 while (ctx->num_blobs_remaining) {
212 ret = read_pwm_blob_header(ctx->wim, hash, &reshdr, &pwm_hdr);
214 if (ret == PWM_FOUND_WIM_HDR) {
215 u16 part_number = le16_to_cpu(pwm_hdr.part_number);
216 u16 total_parts = le16_to_cpu(pwm_hdr.total_parts);
218 if (part_number == ctx->progress.extract.part_number &&
219 total_parts == ctx->progress.extract.total_parts &&
220 guids_equal(pwm_hdr.guid, ctx->progress.extract.guid))
223 copy_guid(ctx->progress.extract.guid, pwm_hdr.guid);
224 ctx->progress.extract.part_number = part_number;
225 ctx->progress.extract.total_parts = total_parts;
226 ret = extract_progress(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_SPWM_PART_BEGIN);
236 if (!(reshdr.flags & WIM_RESHDR_FLAG_METADATA)
237 && (blob = lookup_blob(ctx->wim->blob_table, hash))
238 && (blob->out_refcnt))
240 wim_reshdr_to_desc_and_blob(&reshdr, ctx->wim, &rdesc, blob);
241 ret = read_blob_with_sha1(blob, cbs);
242 blob_unset_is_located_in_wim_resource(blob);
245 ctx->num_blobs_remaining--;
247 wim_reshdr_to_desc(&reshdr, ctx->wim, &rdesc);
248 ret = skip_wim_resource(&rdesc);
257 /* Creates a temporary file opened for writing. The open file descriptor is
258 * returned in @fd_ret and its name is returned in @name_ret (dynamically
261 create_temporary_file(struct filedes *fd_ret, tchar **name_ret)
268 name = ttempnam(NULL, T("wimlib"));
270 ERROR_WITH_ERRNO("Failed to create temporary filename");
271 return WIMLIB_ERR_NOMEM;
274 open_flags = O_WRONLY | O_CREAT | O_EXCL | O_BINARY;
276 open_flags |= _O_SHORT_LIVED;
278 raw_fd = topen(name, open_flags, 0600);
281 if (errno == EEXIST) {
285 ERROR_WITH_ERRNO("Failed to create temporary file "
288 return WIMLIB_ERR_OPEN;
291 filedes_init(fd_ret, raw_fd);
297 begin_extract_blob_wrapper(struct blob_descriptor *blob, void *_ctx)
299 struct apply_ctx *ctx = _ctx;
301 ctx->cur_blob = blob;
302 ctx->cur_blob_offset = 0;
304 if (unlikely(blob->out_refcnt > MAX_OPEN_FILES))
305 return create_temporary_file(&ctx->tmpfile_fd, &ctx->tmpfile_name);
307 return call_begin_blob(blob, ctx->saved_cbs);
311 extract_chunk_wrapper(const void *chunk, size_t size, void *_ctx)
313 struct apply_ctx *ctx = _ctx;
314 union wimlib_progress_info *progress = &ctx->progress;
317 ctx->cur_blob_offset += size;
319 if (likely(ctx->supported_features.hard_links)) {
320 progress->extract.completed_bytes +=
321 (u64)size * ctx->cur_blob->out_refcnt;
322 if (ctx->cur_blob_offset == ctx->cur_blob->size)
323 progress->extract.completed_streams += ctx->cur_blob->out_refcnt;
325 const struct blob_extraction_target *targets =
326 blob_extraction_targets(ctx->cur_blob);
327 for (u32 i = 0; i < ctx->cur_blob->out_refcnt; i++) {
328 const struct wim_inode *inode = targets[i].inode;
329 const struct wim_dentry *dentry;
331 inode_for_each_extraction_alias(dentry, inode) {
332 progress->extract.completed_bytes += size;
333 if (ctx->cur_blob_offset == ctx->cur_blob->size)
334 progress->extract.completed_streams++;
338 if (progress->extract.completed_bytes >= ctx->next_progress) {
340 ret = extract_progress(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS);
344 if (progress->extract.completed_bytes >=
345 progress->extract.total_bytes)
347 ctx->next_progress = UINT64_MAX;
349 /* Send new message as soon as another 1/128 of the
350 * total has been extracted. (Arbitrary number.) */
352 progress->extract.completed_bytes +
353 progress->extract.total_bytes / 128;
355 /* ... Unless that would be more than 5000000 bytes, in
356 * which case send the next after the next 5000000
357 * bytes. (Another arbitrary number.) */
358 if (progress->extract.completed_bytes + 5000000 <
361 progress->extract.completed_bytes + 5000000;
363 /* ... But always send a message as soon as we're
364 * completely done. */
365 if (progress->extract.total_bytes < ctx->next_progress)
366 ctx->next_progress = progress->extract.total_bytes;
370 if (unlikely(filedes_valid(&ctx->tmpfile_fd))) {
371 /* Just extracting to temporary file for now. */
372 ret = full_write(&ctx->tmpfile_fd, chunk, size);
374 ERROR_WITH_ERRNO("Error writing data to "
375 "temporary file \"%"TS"\"",
381 return call_consume_chunk(chunk, size, ctx->saved_cbs);
384 /* Copy the blob's data from the temporary file to each of its targets.
386 * This is executed only in the very uncommon case that a blob is being
387 * extracted to more than MAX_OPEN_FILES targets! */
389 extract_from_tmpfile(const tchar *tmpfile_name,
390 const struct blob_descriptor *orig_blob,
391 const struct read_blob_callbacks *cbs)
393 struct blob_descriptor tmpfile_blob;
394 const struct blob_extraction_target *targets = blob_extraction_targets(orig_blob);
397 memcpy(&tmpfile_blob, orig_blob, sizeof(struct blob_descriptor));
398 tmpfile_blob.blob_location = BLOB_IN_FILE_ON_DISK;
399 tmpfile_blob.file_on_disk = (tchar *)tmpfile_name;
400 tmpfile_blob.out_refcnt = 1;
402 for (u32 i = 0; i < orig_blob->out_refcnt; i++) {
403 tmpfile_blob.inline_blob_extraction_targets[0] = targets[i];
404 ret = read_blob_with_cbs(&tmpfile_blob, cbs);
412 end_extract_blob_wrapper(struct blob_descriptor *blob, int status, void *_ctx)
414 struct apply_ctx *ctx = _ctx;
416 if (unlikely(filedes_valid(&ctx->tmpfile_fd))) {
417 filedes_close(&ctx->tmpfile_fd);
419 status = extract_from_tmpfile(ctx->tmpfile_name, blob,
421 filedes_invalidate(&ctx->tmpfile_fd);
422 tunlink(ctx->tmpfile_name);
423 FREE(ctx->tmpfile_name);
427 return call_end_blob(blob, status, ctx->saved_cbs);
431 * Read the list of blobs to extract and feed their data into the specified
432 * callback functions.
434 * This handles checksumming each blob.
436 * This also handles sending WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS.
438 * This also works if the WIM is being read from a pipe.
440 * This also will split up blobs that will need to be extracted to more than
441 * MAX_OPEN_FILES locations, as measured by the 'out_refcnt' of each blob.
442 * Therefore, the apply_operations implementation need not worry about running
443 * out of file descriptors, unless it might open more than one file descriptor
444 * per 'blob_extraction_target' (e.g. Win32 currently might because the
445 * destination file system might not support hard links).
448 extract_blob_list(struct apply_ctx *ctx, const struct read_blob_callbacks *cbs)
450 struct read_blob_callbacks wrapper_cbs = {
451 .begin_blob = begin_extract_blob_wrapper,
452 .consume_chunk = extract_chunk_wrapper,
453 .end_blob = end_extract_blob_wrapper,
456 ctx->saved_cbs = cbs;
457 if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE) {
458 return read_blobs_from_pipe(ctx, &wrapper_cbs);
460 return read_blob_list(&ctx->blob_list,
461 offsetof(struct blob_descriptor,
463 &wrapper_cbs, VERIFY_BLOB_HASHES);
467 /* Extract a WIM dentry to standard output.
469 * This obviously doesn't make sense in all cases. We return an error if the
470 * dentry does not correspond to a regular file. Otherwise we extract the
471 * unnamed data stream only. */
473 extract_dentry_to_stdout(struct wim_dentry *dentry,
474 const struct blob_table *blob_table)
476 struct wim_inode *inode = dentry->d_inode;
477 struct blob_descriptor *blob;
478 struct filedes _stdout;
480 if (inode->i_attributes & (FILE_ATTRIBUTE_REPARSE_POINT |
481 FILE_ATTRIBUTE_DIRECTORY |
482 FILE_ATTRIBUTE_ENCRYPTED))
484 ERROR("\"%"TS"\" is not a regular file and therefore cannot be "
485 "extracted to standard output", dentry_full_path(dentry));
486 return WIMLIB_ERR_NOT_A_REGULAR_FILE;
489 blob = inode_get_blob_for_unnamed_data_stream(inode, blob_table);
491 const u8 *hash = inode_get_hash_of_unnamed_data_stream(inode);
492 if (!is_zero_hash(hash))
493 return blob_not_found_error(inode, hash);
497 filedes_init(&_stdout, STDOUT_FILENO);
498 return extract_blob_to_fd(blob, &_stdout);
502 extract_dentries_to_stdout(struct wim_dentry **dentries, size_t num_dentries,
503 const struct blob_table *blob_table)
505 for (size_t i = 0; i < num_dentries; i++) {
506 int ret = extract_dentry_to_stdout(dentries[i], blob_table);
513 /**********************************************************************/
516 * Removes duplicate dentries from the array.
518 * Returns the new number of dentries, packed at the front of the array.
521 remove_duplicate_trees(struct wim_dentry **trees, size_t num_trees)
524 for (i = 0; i < num_trees; i++) {
525 if (!trees[i]->d_tmp_flag) {
526 /* Found distinct dentry. */
527 trees[i]->d_tmp_flag = 1;
528 trees[j++] = trees[i];
531 for (i = 0; i < j; i++)
532 trees[i]->d_tmp_flag = 0;
537 * Remove dentries that are descendants of other dentries in the array.
539 * Returns the new number of dentries, packed at the front of the array.
542 remove_contained_trees(struct wim_dentry **trees, size_t num_trees)
545 for (i = 0; i < num_trees; i++)
546 trees[i]->d_tmp_flag = 1;
547 for (i = 0; i < num_trees; i++) {
548 struct wim_dentry *d = trees[i];
549 while (!dentry_is_root(d)) {
554 trees[j++] = trees[i];
558 trees[i]->d_tmp_flag = 0;
561 for (i = 0; i < j; i++)
562 trees[i]->d_tmp_flag = 0;
567 dentry_append_to_list(struct wim_dentry *dentry, void *_dentry_list)
569 struct list_head *dentry_list = _dentry_list;
570 list_add_tail(&dentry->d_extraction_list_node, dentry_list);
575 dentry_reset_extraction_list_node(struct wim_dentry *dentry)
577 dentry->d_extraction_list_node = (struct list_head){NULL, NULL};
581 dentry_delete_from_list(struct wim_dentry *dentry, void *_ignore)
583 list_del(&dentry->d_extraction_list_node);
584 dentry_reset_extraction_list_node(dentry);
589 * Build the preliminary list of dentries to be extracted.
591 * The list maintains the invariant that if d1 and d2 are in the list and d1 is
592 * an ancestor of d2, then d1 appears before d2 in the list.
595 build_dentry_list(struct list_head *dentry_list, struct wim_dentry **trees,
596 size_t num_trees, bool add_ancestors)
598 INIT_LIST_HEAD(dentry_list);
600 /* Add the trees recursively. */
601 for (size_t i = 0; i < num_trees; i++)
602 for_dentry_in_tree(trees[i], dentry_append_to_list, dentry_list);
604 /* If requested, add ancestors of the trees. */
606 for (size_t i = 0; i < num_trees; i++) {
607 struct wim_dentry *dentry = trees[i];
608 struct wim_dentry *ancestor;
609 struct list_head *place_after;
611 if (dentry_is_root(dentry))
614 place_after = dentry_list;
617 ancestor = ancestor->d_parent;
618 if (will_extract_dentry(ancestor)) {
619 place_after = &ancestor->d_extraction_list_node;
622 } while (!dentry_is_root(ancestor));
626 ancestor = ancestor->d_parent;
627 if (will_extract_dentry(ancestor))
629 list_add(&ancestor->d_extraction_list_node, place_after);
630 } while (!dentry_is_root(ancestor));
636 destroy_dentry_list(struct list_head *dentry_list)
638 struct wim_dentry *dentry, *tmp;
639 struct wim_inode *inode;
641 list_for_each_entry_safe(dentry, tmp, dentry_list, d_extraction_list_node) {
642 inode = dentry->d_inode;
643 dentry_reset_extraction_list_node(dentry);
644 inode->i_visited = 0;
645 inode->i_can_externally_back = 0;
646 if ((void *)dentry->d_extraction_name != (void *)dentry->d_name)
647 FREE(dentry->d_extraction_name);
648 dentry->d_extraction_name = NULL;
649 dentry->d_extraction_name_nchars = 0;
654 destroy_blob_list(struct list_head *blob_list)
656 struct blob_descriptor *blob;
658 list_for_each_entry(blob, blob_list, extraction_list)
659 if (blob->out_refcnt > ARRAY_LEN(blob->inline_blob_extraction_targets))
660 FREE(blob->blob_extraction_targets);
664 static const utf16lechar replacement_char = cpu_to_le16(0xfffd);
666 static const utf16lechar replacement_char = cpu_to_le16('?');
670 file_name_valid(utf16lechar *name, size_t num_chars, bool fix)
676 for (i = 0; i < num_chars; i++) {
679 case cpu_to_le16('\\'):
680 case cpu_to_le16(':'):
681 case cpu_to_le16('*'):
682 case cpu_to_le16('?'):
683 case cpu_to_le16('"'):
684 case cpu_to_le16('<'):
685 case cpu_to_le16('>'):
686 case cpu_to_le16('|'):
688 case cpu_to_le16('/'):
689 case cpu_to_le16('\0'):
691 name[i] = replacement_char;
698 if (name[num_chars - 1] == cpu_to_le16(' ') ||
699 name[num_chars - 1] == cpu_to_le16('.'))
702 name[num_chars - 1] = replacement_char;
711 dentry_calculate_extraction_name(struct wim_dentry *dentry,
712 struct apply_ctx *ctx)
716 if (dentry_is_root(dentry))
720 if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
721 dentry->d_extraction_name = dentry->d_name;
722 dentry->d_extraction_name_nchars = dentry->d_name_nbytes /
728 if (!ctx->supported_features.case_sensitive_filenames) {
729 struct wim_dentry *other;
730 list_for_each_entry(other, &dentry->d_ci_conflict_list,
733 if (will_extract_dentry(other)) {
734 if (ctx->extract_flags &
735 WIMLIB_EXTRACT_FLAG_ALL_CASE_CONFLICTS) {
736 WARNING("\"%"TS"\" has the same "
737 "case-insensitive name as "
738 "\"%"TS"\"; extracting "
739 "dummy name instead",
740 dentry_full_path(dentry),
741 dentry_full_path(other));
744 WARNING("Not extracting \"%"TS"\": "
745 "has same case-insensitive "
747 dentry_full_path(dentry),
748 dentry_full_path(other));
755 if (file_name_valid(dentry->d_name, dentry->d_name_nbytes / 2, false)) {
757 ret = utf16le_get_tstr(dentry->d_name,
758 dentry->d_name_nbytes,
759 (const tchar **)&dentry->d_extraction_name,
761 dentry->d_extraction_name_nchars = nbytes / sizeof(tchar);
764 if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_REPLACE_INVALID_FILENAMES)
766 WARNING("\"%"TS"\" has an invalid filename "
767 "that is not supported on this platform; "
768 "extracting dummy name instead",
769 dentry_full_path(dentry));
772 WARNING("Not extracting \"%"TS"\": has an invalid filename "
773 "that is not supported on this platform",
774 dentry_full_path(dentry));
781 utf16lechar utf16_name_copy[dentry->d_name_nbytes / 2];
783 memcpy(utf16_name_copy, dentry->d_name, dentry->d_name_nbytes);
784 file_name_valid(utf16_name_copy, dentry->d_name_nbytes / 2, true);
786 const tchar *tchar_name;
789 ret = utf16le_get_tstr(utf16_name_copy,
790 dentry->d_name_nbytes,
791 &tchar_name, &tchar_nchars);
795 tchar_nchars /= sizeof(tchar);
797 size_t fixed_name_num_chars = tchar_nchars;
798 tchar fixed_name[tchar_nchars + 50];
800 tmemcpy(fixed_name, tchar_name, tchar_nchars);
801 fixed_name_num_chars += tsprintf(fixed_name + tchar_nchars,
802 T(" (invalid filename #%lu)"),
803 ++ctx->invalid_sequence);
805 utf16le_put_tstr(tchar_name);
807 dentry->d_extraction_name = TSTRDUP(fixed_name);
808 if (!dentry->d_extraction_name)
809 return WIMLIB_ERR_NOMEM;
810 dentry->d_extraction_name_nchars = fixed_name_num_chars;
815 for_dentry_in_tree(dentry, dentry_delete_from_list, NULL);
820 * Calculate the actual filename component at which each WIM dentry will be
821 * extracted, with special handling for dentries that are unsupported by the
822 * extraction backend or have invalid names.
824 * ctx->supported_features must be filled in.
826 * Possible error codes: WIMLIB_ERR_NOMEM, WIMLIB_ERR_INVALID_UTF16_STRING
829 dentry_list_calculate_extraction_names(struct list_head *dentry_list,
830 struct apply_ctx *ctx)
832 struct list_head *prev, *cur;
834 /* Can't use list_for_each_entry() because a call to
835 * dentry_calculate_extraction_name() may delete the current dentry and
836 * its children from the list. */
840 struct wim_dentry *dentry;
844 if (cur == dentry_list)
847 dentry = list_entry(cur, struct wim_dentry, d_extraction_list_node);
849 ret = dentry_calculate_extraction_name(dentry, ctx);
853 if (prev->next == cur)
856 ; /* Current dentry and its children (which follow in
857 the list) were deleted. prev stays the same. */
863 dentry_resolve_streams(struct wim_dentry *dentry, int extract_flags,
864 struct blob_table *blob_table)
866 struct wim_inode *inode = dentry->d_inode;
867 struct blob_descriptor *blob;
871 /* Special case: when extracting from a pipe, the WIM blob table is
872 * initially empty, so "resolving" an inode's streams is initially not
873 * possible. However, we still need to keep track of which blobs,
874 * identified by SHA-1 message digests, need to be extracted, so we
875 * "resolve" the inode's streams anyway by allocating a 'struct
876 * blob_descriptor' for each one. */
877 if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE)
879 ret = inode_resolve_streams(inode, blob_table, force);
882 for (unsigned i = 0; i < inode->i_num_streams; i++) {
883 blob = stream_blob_resolved(&inode->i_streams[i]);
885 blob->out_refcnt = 0;
891 * For each dentry to be extracted, resolve all streams in the corresponding
892 * inode and set 'out_refcnt' in all referenced blob_descriptors to 0.
894 * Possible error codes: WIMLIB_ERR_RESOURCE_NOT_FOUND, WIMLIB_ERR_NOMEM.
897 dentry_list_resolve_streams(struct list_head *dentry_list,
898 struct apply_ctx *ctx)
900 struct wim_dentry *dentry;
903 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
904 ret = dentry_resolve_streams(dentry,
906 ctx->wim->blob_table);
914 ref_stream(struct wim_inode_stream *strm, struct wim_dentry *dentry,
915 struct apply_ctx *ctx)
917 struct wim_inode *inode = dentry->d_inode;
918 struct blob_descriptor *blob = stream_blob_resolved(strm);
919 struct blob_extraction_target *targets;
924 /* Tally the size only for each actual extraction of the stream (not
925 * additional hard links to the inode). */
926 if (inode->i_visited && ctx->supported_features.hard_links)
929 ctx->progress.extract.total_bytes += blob->size;
930 ctx->progress.extract.total_streams++;
932 if (inode->i_visited)
935 /* Add each blob to 'ctx->blob_list' only one time, regardless of how
936 * many extraction targets it will have. */
937 if (blob->out_refcnt == 0) {
938 list_add_tail(&blob->extraction_list, &ctx->blob_list);
939 ctx->num_blobs_remaining++;
942 /* Set this stream as an extraction target of 'blob'. */
944 if (blob->out_refcnt < ARRAY_LEN(blob->inline_blob_extraction_targets)) {
945 targets = blob->inline_blob_extraction_targets;
947 struct blob_extraction_target *prev_targets;
948 size_t alloc_blob_extraction_targets;
950 if (blob->out_refcnt == ARRAY_LEN(blob->inline_blob_extraction_targets)) {
952 alloc_blob_extraction_targets = ARRAY_LEN(blob->inline_blob_extraction_targets);
954 prev_targets = blob->blob_extraction_targets;
955 alloc_blob_extraction_targets = blob->alloc_blob_extraction_targets;
958 if (blob->out_refcnt == alloc_blob_extraction_targets) {
959 alloc_blob_extraction_targets *= 2;
960 targets = REALLOC(prev_targets,
961 alloc_blob_extraction_targets *
964 return WIMLIB_ERR_NOMEM;
967 blob->inline_blob_extraction_targets,
968 sizeof(blob->inline_blob_extraction_targets));
970 blob->blob_extraction_targets = targets;
971 blob->alloc_blob_extraction_targets = alloc_blob_extraction_targets;
973 targets = blob->blob_extraction_targets;
975 targets[blob->out_refcnt].inode = inode;
976 targets[blob->out_refcnt].stream = strm;
982 ref_stream_if_needed(struct wim_dentry *dentry, struct wim_inode *inode,
983 struct wim_inode_stream *strm, struct apply_ctx *ctx)
985 bool need_stream = false;
986 switch (strm->stream_type) {
987 case STREAM_TYPE_DATA:
988 if (stream_is_named(strm)) {
989 /* Named data stream */
990 if (ctx->supported_features.named_data_streams)
992 } else if (!(inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
993 FILE_ATTRIBUTE_ENCRYPTED))
994 && !(inode_is_symlink(inode)
995 && !ctx->supported_features.reparse_points
996 && ctx->supported_features.symlink_reparse_points))
999 * Unnamed data stream. Skip if any of the following is true:
1001 * - file is a directory
1002 * - file is encrypted
1003 * - backend needs to create the file as UNIX symlink
1004 * - backend will extract the stream as externally backed
1006 if (ctx->apply_ops->will_externally_back) {
1007 int ret = (*ctx->apply_ops->will_externally_back)(dentry, ctx);
1008 if (ret > 0) /* Error? */
1010 if (ret < 0) /* Won't externally back? */
1017 case STREAM_TYPE_REPARSE_POINT:
1018 wimlib_assert(inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT);
1019 if (ctx->supported_features.reparse_points ||
1020 (inode_is_symlink(inode) &&
1021 ctx->supported_features.symlink_reparse_points))
1024 case STREAM_TYPE_EFSRPC_RAW_DATA:
1025 wimlib_assert(inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED);
1026 if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
1027 if (ctx->supported_features.encrypted_directories)
1030 if (ctx->supported_features.encrypted_files)
1036 return ref_stream(strm, dentry, ctx);
1041 dentry_ref_streams(struct wim_dentry *dentry, struct apply_ctx *ctx)
1043 struct wim_inode *inode = dentry->d_inode;
1044 for (unsigned i = 0; i < inode->i_num_streams; i++) {
1045 int ret = ref_stream_if_needed(dentry, inode,
1046 &inode->i_streams[i], ctx);
1050 inode->i_visited = 1;
1055 * Given a list of dentries to be extracted, build the list of blobs that need
1056 * to be extracted, and for each blob determine the streams to which that blob
1057 * will be extracted.
1059 * This also initializes the extract progress info with byte and blob
1062 * ctx->supported_features must be filled in.
1065 dentry_list_ref_streams(struct list_head *dentry_list, struct apply_ctx *ctx)
1067 struct wim_dentry *dentry;
1070 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
1071 ret = dentry_ref_streams(dentry, ctx);
1075 list_for_each_entry(dentry, dentry_list, d_extraction_list_node)
1076 dentry->d_inode->i_visited = 0;
1081 dentry_list_build_inode_alias_lists(struct list_head *dentry_list)
1083 struct wim_dentry *dentry;
1085 list_for_each_entry(dentry, dentry_list, d_extraction_list_node)
1086 dentry->d_inode->i_first_extraction_alias = NULL;
1088 list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
1089 dentry->d_next_extraction_alias = dentry->d_inode->i_first_extraction_alias;
1090 dentry->d_inode->i_first_extraction_alias = dentry;
1095 inode_tally_features(const struct wim_inode *inode,
1096 struct wim_features *features)
1098 if (inode->i_attributes & FILE_ATTRIBUTE_ARCHIVE)
1099 features->archive_files++;
1100 if (inode->i_attributes & FILE_ATTRIBUTE_HIDDEN)
1101 features->hidden_files++;
1102 if (inode->i_attributes & FILE_ATTRIBUTE_SYSTEM)
1103 features->system_files++;
1104 if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED)
1105 features->compressed_files++;
1106 if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) {
1107 if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY)
1108 features->encrypted_directories++;
1110 features->encrypted_files++;
1112 if (inode->i_attributes & FILE_ATTRIBUTE_NOT_CONTENT_INDEXED)
1113 features->not_context_indexed_files++;
1114 if (inode->i_attributes & FILE_ATTRIBUTE_SPARSE_FILE)
1115 features->sparse_files++;
1116 if (inode_has_named_data_stream(inode))
1117 features->named_data_streams++;
1118 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
1119 features->reparse_points++;
1120 if (inode_is_symlink(inode))
1121 features->symlink_reparse_points++;
1123 features->other_reparse_points++;
1125 if (inode_has_security_descriptor(inode))
1126 features->security_descriptors++;
1127 if (inode_has_unix_data(inode))
1128 features->unix_data++;
1131 /* Tally features necessary to extract a dentry and the corresponding inode. */
1133 dentry_tally_features(struct wim_dentry *dentry, struct wim_features *features)
1135 struct wim_inode *inode = dentry->d_inode;
1137 if (dentry_has_short_name(dentry))
1138 features->short_names++;
1140 if (inode->i_visited) {
1141 features->hard_links++;
1143 inode_tally_features(inode, features);
1144 inode->i_visited = 1;
1148 /* Tally the features necessary to extract the specified dentries. */
1150 dentry_list_get_features(struct list_head *dentry_list,
1151 struct wim_features *features)
1153 struct wim_dentry *dentry;
1155 list_for_each_entry(dentry, dentry_list, d_extraction_list_node)
1156 dentry_tally_features(dentry, features);
1158 list_for_each_entry(dentry, dentry_list, d_extraction_list_node)
1159 dentry->d_inode->i_visited = 0;
1163 do_feature_check(const struct wim_features *required_features,
1164 const struct wim_features *supported_features,
1167 /* Encrypted files. */
1168 if (required_features->encrypted_files &&
1169 !supported_features->encrypted_files)
1170 WARNING("Ignoring EFS-encrypted data of %lu files",
1171 required_features->encrypted_files);
1173 /* Named data streams. */
1174 if (required_features->named_data_streams &&
1175 !supported_features->named_data_streams)
1176 WARNING("Ignoring named data streams of %lu files",
1177 required_features->named_data_streams);
1179 /* File attributes. */
1180 if (!(extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES)) {
1181 /* Note: Don't bother the user about FILE_ATTRIBUTE_ARCHIVE.
1182 * We're an archive program, so theoretically we can do what we
1185 if (required_features->hidden_files &&
1186 !supported_features->hidden_files)
1187 WARNING("Ignoring FILE_ATTRIBUTE_HIDDEN of %lu files",
1188 required_features->hidden_files);
1190 if (required_features->system_files &&
1191 !supported_features->system_files)
1192 WARNING("Ignoring FILE_ATTRIBUTE_SYSTEM of %lu files",
1193 required_features->system_files);
1195 if (required_features->compressed_files &&
1196 !supported_features->compressed_files)
1197 WARNING("Ignoring FILE_ATTRIBUTE_COMPRESSED of %lu files",
1198 required_features->compressed_files);
1200 if (required_features->not_context_indexed_files &&
1201 !supported_features->not_context_indexed_files)
1202 WARNING("Ignoring FILE_ATTRIBUTE_NOT_CONTENT_INDEXED of %lu files",
1203 required_features->not_context_indexed_files);
1205 if (required_features->sparse_files &&
1206 !supported_features->sparse_files)
1207 WARNING("Ignoring FILE_ATTRIBUTE_SPARSE_FILE of %lu files",
1208 required_features->sparse_files);
1210 if (required_features->encrypted_directories &&
1211 !supported_features->encrypted_directories)
1212 WARNING("Ignoring FILE_ATTRIBUTE_ENCRYPTED of %lu directories",
1213 required_features->encrypted_directories);
1217 if (required_features->hard_links && !supported_features->hard_links)
1218 WARNING("Extracting %lu hard links as independent files",
1219 required_features->hard_links);
1221 /* Symbolic links and reparse points. */
1222 if ((extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SYMLINKS) &&
1223 required_features->symlink_reparse_points &&
1224 !supported_features->symlink_reparse_points &&
1225 !supported_features->reparse_points)
1227 ERROR("Extraction backend does not support symbolic links!");
1228 return WIMLIB_ERR_UNSUPPORTED;
1230 if (required_features->reparse_points &&
1231 !supported_features->reparse_points)
1233 if (supported_features->symlink_reparse_points) {
1234 if (required_features->other_reparse_points) {
1235 WARNING("Ignoring reparse data of %lu non-symlink/junction files",
1236 required_features->other_reparse_points);
1239 WARNING("Ignoring reparse data of %lu files",
1240 required_features->reparse_points);
1244 /* Security descriptors. */
1245 if (((extract_flags & (WIMLIB_EXTRACT_FLAG_STRICT_ACLS |
1246 WIMLIB_EXTRACT_FLAG_UNIX_DATA))
1247 == WIMLIB_EXTRACT_FLAG_STRICT_ACLS) &&
1248 required_features->security_descriptors &&
1249 !supported_features->security_descriptors)
1251 ERROR("Extraction backend does not support security descriptors!");
1252 return WIMLIB_ERR_UNSUPPORTED;
1254 if (!(extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS) &&
1255 required_features->security_descriptors &&
1256 !supported_features->security_descriptors)
1257 WARNING("Ignoring Windows NT security descriptors of %lu files",
1258 required_features->security_descriptors);
1261 if ((extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) &&
1262 required_features->unix_data && !supported_features->unix_data)
1264 ERROR("Extraction backend does not support UNIX data!");
1265 return WIMLIB_ERR_UNSUPPORTED;
1268 if (required_features->unix_data &&
1269 !(extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA))
1271 WARNING("Ignoring UNIX metadata of %lu files",
1272 required_features->unix_data);
1276 if (required_features->short_names &&
1277 !supported_features->short_names)
1279 if (extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SHORT_NAMES) {
1280 ERROR("Extraction backend does not support DOS names!");
1281 return WIMLIB_ERR_UNSUPPORTED;
1283 WARNING("Ignoring DOS names of %lu files",
1284 required_features->short_names);
1288 if ((extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_TIMESTAMPS) &&
1289 !supported_features->timestamps)
1291 ERROR("Extraction backend does not support timestamps!");
1292 return WIMLIB_ERR_UNSUPPORTED;
1298 static const struct apply_operations *
1299 select_apply_operations(int extract_flags)
1302 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS)
1303 return &ntfs_3g_apply_ops;
1306 return &win32_apply_ops;
1308 return &unix_apply_ops;
1313 extract_trees(WIMStruct *wim, struct wim_dentry **trees, size_t num_trees,
1314 const tchar *target, int extract_flags)
1316 const struct apply_operations *ops;
1317 struct apply_ctx *ctx;
1319 LIST_HEAD(dentry_list);
1321 if (extract_flags & WIMLIB_EXTRACT_FLAG_TO_STDOUT) {
1322 ret = extract_dentries_to_stdout(trees, num_trees,
1327 num_trees = remove_duplicate_trees(trees, num_trees);
1328 num_trees = remove_contained_trees(trees, num_trees);
1330 ops = select_apply_operations(extract_flags);
1332 if (num_trees > 1 && ops->single_tree_only) {
1333 ERROR("Extracting multiple directory trees "
1334 "at once is not supported in %s extraction mode!",
1336 ret = WIMLIB_ERR_UNSUPPORTED;
1340 ctx = CALLOC(1, ops->context_size);
1342 ret = WIMLIB_ERR_NOMEM;
1347 ctx->target = target;
1348 ctx->target_nchars = tstrlen(target);
1349 ctx->extract_flags = extract_flags;
1350 if (ctx->wim->progfunc) {
1351 ctx->progfunc = ctx->wim->progfunc;
1352 ctx->progctx = ctx->wim->progctx;
1353 ctx->progress.extract.image = wim->current_image;
1354 ctx->progress.extract.extract_flags = (extract_flags &
1355 WIMLIB_EXTRACT_MASK_PUBLIC);
1356 ctx->progress.extract.wimfile_name = wim->filename;
1357 ctx->progress.extract.image_name = wimlib_get_image_name(wim,
1358 wim->current_image);
1359 ctx->progress.extract.target = target;
1361 INIT_LIST_HEAD(&ctx->blob_list);
1362 filedes_invalidate(&ctx->tmpfile_fd);
1363 ctx->apply_ops = ops;
1365 ret = (*ops->get_supported_features)(target, &ctx->supported_features);
1369 build_dentry_list(&dentry_list, trees, num_trees,
1371 WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE));
1373 dentry_list_get_features(&dentry_list, &ctx->required_features);
1375 ret = do_feature_check(&ctx->required_features, &ctx->supported_features,
1376 ctx->extract_flags);
1380 ret = dentry_list_calculate_extraction_names(&dentry_list, ctx);
1384 if (unlikely(list_empty(&dentry_list))) {
1385 WARNING("There is nothing to extract!");
1389 ret = dentry_list_resolve_streams(&dentry_list, ctx);
1393 dentry_list_build_inode_alias_lists(&dentry_list);
1395 ret = dentry_list_ref_streams(&dentry_list, ctx);
1399 if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE) {
1400 /* When extracting from a pipe, the number of bytes of data to
1401 * extract can't be determined in the normal way (examining the
1402 * blob table), since at this point all we have is a set of
1403 * SHA-1 message digests of blobs that need to be extracted.
1404 * However, we can get a reasonably accurate estimate by taking
1405 * <TOTALBYTES> from the corresponding <IMAGE> in the WIM XML
1406 * data. This does assume that a full image is being extracted,
1407 * but currently there is no API for doing otherwise. (Also,
1408 * subtract <HARDLINKBYTES> from this if hard links are
1409 * supported by the extraction mode.) */
1410 ctx->progress.extract.total_bytes =
1411 wim_info_get_image_total_bytes(wim->wim_info,
1412 wim->current_image);
1413 if (ctx->supported_features.hard_links) {
1414 ctx->progress.extract.total_bytes -=
1415 wim_info_get_image_hard_link_bytes(wim->wim_info,
1416 wim->current_image);
1420 ret = extract_progress(ctx,
1421 ((extract_flags & WIMLIB_EXTRACT_FLAG_IMAGEMODE) ?
1422 WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN :
1423 WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN));
1427 ret = (*ops->extract)(&dentry_list, ctx);
1431 if (ctx->progress.extract.completed_bytes <
1432 ctx->progress.extract.total_bytes)
1434 ctx->progress.extract.completed_bytes =
1435 ctx->progress.extract.total_bytes;
1436 ret = extract_progress(ctx, WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS);
1441 ret = extract_progress(ctx,
1442 ((extract_flags & WIMLIB_EXTRACT_FLAG_IMAGEMODE) ?
1443 WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END :
1444 WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END));
1446 destroy_blob_list(&ctx->blob_list);
1447 destroy_dentry_list(&dentry_list);
1454 mkdir_if_needed(const tchar *target)
1456 if (!tmkdir(target, 0755))
1459 if (errno == EEXIST)
1463 /* _wmkdir() fails with EACCES if called on a drive root directory. */
1464 if (errno == EACCES)
1468 ERROR_WITH_ERRNO("Failed to create directory \"%"TS"\"", target);
1469 return WIMLIB_ERR_MKDIR;
1472 /* Make sure the extraction flags make sense, and update them if needed. */
1474 check_extract_flags(const WIMStruct *wim, int *extract_flags_p)
1476 int extract_flags = *extract_flags_p;
1478 /* Check for invalid flag combinations */
1480 if ((extract_flags &
1481 (WIMLIB_EXTRACT_FLAG_NO_ACLS |
1482 WIMLIB_EXTRACT_FLAG_STRICT_ACLS)) == (WIMLIB_EXTRACT_FLAG_NO_ACLS |
1483 WIMLIB_EXTRACT_FLAG_STRICT_ACLS))
1484 return WIMLIB_ERR_INVALID_PARAM;
1486 if ((extract_flags &
1487 (WIMLIB_EXTRACT_FLAG_RPFIX |
1488 WIMLIB_EXTRACT_FLAG_NORPFIX)) == (WIMLIB_EXTRACT_FLAG_RPFIX |
1489 WIMLIB_EXTRACT_FLAG_NORPFIX))
1490 return WIMLIB_ERR_INVALID_PARAM;
1492 #ifndef WITH_NTFS_3G
1493 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
1494 ERROR("wimlib was compiled without support for NTFS-3g, so\n"
1495 " it cannot apply a WIM image directly to an NTFS volume.");
1496 return WIMLIB_ERR_UNSUPPORTED;
1500 if (extract_flags & WIMLIB_EXTRACT_FLAG_WIMBOOT) {
1503 return WIMLIB_ERR_NO_FILENAME;
1505 ERROR("WIMBoot extraction is only supported on Windows!");
1506 return WIMLIB_ERR_UNSUPPORTED;
1511 if ((extract_flags & (WIMLIB_EXTRACT_FLAG_RPFIX |
1512 WIMLIB_EXTRACT_FLAG_NORPFIX |
1513 WIMLIB_EXTRACT_FLAG_IMAGEMODE)) ==
1514 WIMLIB_EXTRACT_FLAG_IMAGEMODE)
1516 /* For full-image extraction, do reparse point fixups by default
1517 * if the WIM header says they are enabled. */
1518 if (wim->hdr.flags & WIM_HDR_FLAG_RP_FIX)
1519 extract_flags |= WIMLIB_EXTRACT_FLAG_RPFIX;
1522 *extract_flags_p = extract_flags;
1527 get_wildcard_flags(int extract_flags)
1529 u32 wildcard_flags = 0;
1531 if (extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_GLOB)
1532 wildcard_flags |= WILDCARD_FLAG_ERROR_IF_NO_MATCH;
1534 wildcard_flags |= WILDCARD_FLAG_WARN_IF_NO_MATCH;
1536 if (default_ignore_case)
1537 wildcard_flags |= WILDCARD_FLAG_CASE_INSENSITIVE;
1539 return wildcard_flags;
1542 struct append_dentry_ctx {
1543 struct wim_dentry **dentries;
1544 size_t num_dentries;
1545 size_t num_alloc_dentries;
1549 append_dentry_cb(struct wim_dentry *dentry, void *_ctx)
1551 struct append_dentry_ctx *ctx = _ctx;
1553 if (ctx->num_dentries == ctx->num_alloc_dentries) {
1554 struct wim_dentry **new_dentries;
1557 new_length = max(ctx->num_alloc_dentries + 8,
1558 ctx->num_alloc_dentries * 3 / 2);
1559 new_dentries = REALLOC(ctx->dentries,
1560 new_length * sizeof(ctx->dentries[0]));
1561 if (new_dentries == NULL)
1562 return WIMLIB_ERR_NOMEM;
1563 ctx->dentries = new_dentries;
1564 ctx->num_alloc_dentries = new_length;
1566 ctx->dentries[ctx->num_dentries++] = dentry;
1571 do_wimlib_extract_paths(WIMStruct *wim, int image, const tchar *target,
1572 const tchar * const *paths, size_t num_paths,
1576 struct wim_dentry **trees;
1579 if (wim == NULL || target == NULL || target[0] == T('\0') ||
1580 (num_paths != 0 && paths == NULL))
1581 return WIMLIB_ERR_INVALID_PARAM;
1583 ret = check_extract_flags(wim, &extract_flags);
1587 ret = select_wim_image(wim, image);
1591 ret = wim_checksum_unhashed_blobs(wim);
1595 if ((extract_flags & (WIMLIB_EXTRACT_FLAG_NTFS |
1596 WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE)) ==
1597 (WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE))
1599 ret = mkdir_if_needed(target);
1604 if (extract_flags & WIMLIB_EXTRACT_FLAG_GLOB_PATHS) {
1606 struct append_dentry_ctx append_dentry_ctx = {
1609 .num_alloc_dentries = 0,
1612 u32 wildcard_flags = get_wildcard_flags(extract_flags);
1614 for (size_t i = 0; i < num_paths; i++) {
1615 tchar *path = canonicalize_wim_path(paths[i]);
1617 ret = WIMLIB_ERR_NOMEM;
1618 trees = append_dentry_ctx.dentries;
1619 goto out_free_trees;
1621 ret = expand_wildcard(wim, path,
1627 trees = append_dentry_ctx.dentries;
1628 goto out_free_trees;
1631 trees = append_dentry_ctx.dentries;
1632 num_trees = append_dentry_ctx.num_dentries;
1634 trees = MALLOC(num_paths * sizeof(trees[0]));
1636 return WIMLIB_ERR_NOMEM;
1638 for (size_t i = 0; i < num_paths; i++) {
1640 tchar *path = canonicalize_wim_path(paths[i]);
1642 ret = WIMLIB_ERR_NOMEM;
1643 goto out_free_trees;
1646 trees[i] = get_dentry(wim, path,
1647 WIMLIB_CASE_PLATFORM_DEFAULT);
1649 if (trees[i] == NULL) {
1650 ERROR("Path \"%"TS"\" does not exist "
1652 paths[i], wim->current_image);
1653 ret = WIMLIB_ERR_PATH_DOES_NOT_EXIST;
1654 goto out_free_trees;
1657 num_trees = num_paths;
1660 if (num_trees == 0) {
1662 goto out_free_trees;
1665 ret = extract_trees(wim, trees, num_trees, target, extract_flags);
1672 extract_single_image(WIMStruct *wim, int image,
1673 const tchar *target, int extract_flags)
1675 const tchar *path = WIMLIB_WIM_ROOT_PATH;
1676 extract_flags |= WIMLIB_EXTRACT_FLAG_IMAGEMODE;
1677 return do_wimlib_extract_paths(wim, image, target, &path, 1, extract_flags);
1680 static const tchar * const filename_forbidden_chars =
1689 /* This function checks if it is okay to use a WIM image's name as a directory
1692 image_name_ok_as_dir(const tchar *image_name)
1694 return image_name && *image_name &&
1695 !tstrpbrk(image_name, filename_forbidden_chars) &&
1696 tstrcmp(image_name, T(".")) &&
1697 tstrcmp(image_name, T(".."));
1700 /* Extracts all images from the WIM to the directory @target, with the images
1701 * placed in subdirectories named by their image names. */
1703 extract_all_images(WIMStruct *wim, const tchar *target, int extract_flags)
1705 size_t image_name_max_len = max(xml_get_max_image_name_len(wim), 20);
1706 size_t output_path_len = tstrlen(target);
1707 tchar buf[output_path_len + 1 + image_name_max_len + 1];
1710 const tchar *image_name;
1712 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
1713 ERROR("Cannot extract multiple images in NTFS extraction mode.");
1714 return WIMLIB_ERR_INVALID_PARAM;
1717 ret = mkdir_if_needed(target);
1720 tmemcpy(buf, target, output_path_len);
1721 buf[output_path_len] = OS_PREFERRED_PATH_SEPARATOR;
1722 for (image = 1; image <= wim->hdr.image_count; image++) {
1723 image_name = wimlib_get_image_name(wim, image);
1724 if (image_name_ok_as_dir(image_name)) {
1725 tstrcpy(buf + output_path_len + 1, image_name);
1727 /* Image name is empty or contains forbidden characters.
1728 * Use image number instead. */
1729 tsprintf(buf + output_path_len + 1, T("%d"), image);
1731 ret = extract_single_image(wim, image, buf, extract_flags);
1739 do_wimlib_extract_image(WIMStruct *wim, int image, const tchar *target,
1742 if (extract_flags & (WIMLIB_EXTRACT_FLAG_NO_PRESERVE_DIR_STRUCTURE |
1743 WIMLIB_EXTRACT_FLAG_TO_STDOUT |
1744 WIMLIB_EXTRACT_FLAG_GLOB_PATHS))
1745 return WIMLIB_ERR_INVALID_PARAM;
1747 if (image == WIMLIB_ALL_IMAGES)
1748 return extract_all_images(wim, target, extract_flags);
1750 return extract_single_image(wim, image, target, extract_flags);
1754 /****************************************************************************
1756 ****************************************************************************/
1759 wimlib_extract_paths(WIMStruct *wim, int image, const tchar *target,
1760 const tchar * const *paths, size_t num_paths,
1763 if (extract_flags & ~WIMLIB_EXTRACT_MASK_PUBLIC)
1764 return WIMLIB_ERR_INVALID_PARAM;
1766 return do_wimlib_extract_paths(wim, image, target, paths, num_paths,
1771 wimlib_extract_pathlist(WIMStruct *wim, int image, const tchar *target,
1772 const tchar *path_list_file, int extract_flags)
1779 ret = read_path_list_file(path_list_file, &paths, &num_paths, &mem);
1781 ERROR("Failed to read path list file \"%"TS"\"",
1786 ret = wimlib_extract_paths(wim, image, target,
1787 (const tchar * const *)paths, num_paths,
1795 wimlib_extract_image_from_pipe_with_progress(int pipe_fd,
1796 const tchar *image_num_or_name,
1797 const tchar *target,
1799 wimlib_progress_func_t progfunc,
1804 struct filedes *in_fd;
1808 if (extract_flags & ~WIMLIB_EXTRACT_MASK_PUBLIC)
1809 return WIMLIB_ERR_INVALID_PARAM;
1811 /* Read the WIM header from the pipe and get a WIMStruct to represent
1812 * the pipable WIM. Caveats: Unlike getting a WIMStruct with
1813 * wimlib_open_wim(), getting a WIMStruct in this way will result in an
1814 * empty blob table, no XML data read, and no filename set. */
1815 ret = open_wim_as_WIMStruct(&pipe_fd, WIMLIB_OPEN_FLAG_FROM_PIPE, &pwm,
1820 /* Sanity check to make sure this is a pipable WIM. */
1821 if (pwm->hdr.magic != PWM_MAGIC) {
1822 ERROR("The WIM being read from file descriptor %d "
1823 "is not pipable!", pipe_fd);
1824 ret = WIMLIB_ERR_NOT_PIPABLE;
1825 goto out_wimlib_free;
1828 /* Sanity check to make sure the first part of a pipable split WIM is
1829 * sent over the pipe first. */
1830 if (pwm->hdr.part_number != 1) {
1831 ERROR("The first part of the split WIM must be "
1832 "sent over the pipe first.");
1833 ret = WIMLIB_ERR_INVALID_PIPABLE_WIM;
1834 goto out_wimlib_free;
1837 in_fd = &pwm->in_fd;
1838 wimlib_assert(in_fd->offset == WIM_HEADER_DISK_SIZE);
1840 /* As mentioned, the WIMStruct we created from the pipe does not have
1841 * XML data yet. Fix this by reading the extra copy of the XML data
1842 * that directly follows the header in pipable WIMs. (Note: see
1843 * write_pipable_wim() for more details about the format of pipable
1846 u8 hash[SHA1_HASH_SIZE];
1848 ret = read_pwm_blob_header(pwm, hash,
1849 &pwm->hdr.xml_data_reshdr, NULL);
1851 goto out_wimlib_free;
1853 if (!(pwm->hdr.xml_data_reshdr.flags & WIM_RESHDR_FLAG_METADATA)) {
1854 ERROR("Expected XML data, but found non-metadata resource.");
1855 ret = WIMLIB_ERR_INVALID_PIPABLE_WIM;
1856 goto out_wimlib_free;
1859 ret = read_wim_xml_data(pwm);
1861 goto out_wimlib_free;
1863 if (wim_info_get_num_images(pwm->wim_info) != pwm->hdr.image_count) {
1864 ERROR("Image count in XML data is not the same as in WIM header.");
1865 ret = WIMLIB_ERR_IMAGE_COUNT;
1866 goto out_wimlib_free;
1870 /* Get image index (this may use the XML data that was just read to
1871 * resolve an image name). */
1872 if (image_num_or_name) {
1873 image = wimlib_resolve_image(pwm, image_num_or_name);
1874 if (image == WIMLIB_NO_IMAGE) {
1875 ERROR("\"%"TS"\" is not a valid image in the pipable WIM!",
1877 ret = WIMLIB_ERR_INVALID_IMAGE;
1878 goto out_wimlib_free;
1879 } else if (image == WIMLIB_ALL_IMAGES) {
1880 ERROR("Applying all images from a pipe is not supported!");
1881 ret = WIMLIB_ERR_INVALID_IMAGE;
1882 goto out_wimlib_free;
1885 if (pwm->hdr.image_count != 1) {
1886 ERROR("No image was specified, but the pipable WIM "
1887 "did not contain exactly 1 image");
1888 ret = WIMLIB_ERR_INVALID_IMAGE;
1889 goto out_wimlib_free;
1894 /* Load the needed metadata resource. */
1895 for (i = 1; i <= pwm->hdr.image_count; i++) {
1896 struct wim_image_metadata *imd;
1897 struct wim_reshdr reshdr;
1898 struct wim_resource_descriptor *metadata_rdesc;
1900 imd = pwm->image_metadata[i - 1];
1902 ret = WIMLIB_ERR_NOMEM;
1903 imd->metadata_blob = new_blob_descriptor();
1904 if (!imd->metadata_blob)
1905 goto out_wimlib_free;
1907 imd->metadata_blob->is_metadata = 1;
1909 ret = read_pwm_blob_header(pwm, imd->metadata_blob->hash,
1912 goto out_wimlib_free;
1914 if (!(reshdr.flags & WIM_RESHDR_FLAG_METADATA)) {
1915 ERROR("Expected metadata resource, but found "
1916 "non-metadata resource");
1917 ret = WIMLIB_ERR_INVALID_PIPABLE_WIM;
1918 goto out_wimlib_free;
1921 ret = WIMLIB_ERR_NOMEM;
1922 metadata_rdesc = MALLOC(sizeof(struct wim_resource_descriptor));
1923 if (!metadata_rdesc)
1924 goto out_wimlib_free;
1925 wim_reshdr_to_desc_and_blob(&reshdr, pwm, metadata_rdesc,
1926 imd->metadata_blob);
1929 /* Metadata resource is for the image being extracted.
1930 * Parse it and save the metadata in memory. */
1931 ret = read_metadata_resource(imd);
1933 goto out_wimlib_free;
1936 /* Metadata resource is not for the image being
1937 * extracted. Skip over it. */
1938 ret = skip_wim_resource(metadata_rdesc);
1940 goto out_wimlib_free;
1943 /* Extract the image. */
1944 extract_flags |= WIMLIB_EXTRACT_FLAG_FROM_PIPE;
1945 ret = do_wimlib_extract_image(pwm, image, target, extract_flags);
1946 /* Clean up and return. */
1954 wimlib_extract_image_from_pipe(int pipe_fd, const tchar *image_num_or_name,
1955 const tchar *target, int extract_flags)
1957 return wimlib_extract_image_from_pipe_with_progress(pipe_fd,
1966 wimlib_extract_image(WIMStruct *wim, int image, const tchar *target,
1969 if (extract_flags & ~WIMLIB_EXTRACT_MASK_PUBLIC)
1970 return WIMLIB_ERR_INVALID_PARAM;
1971 return do_wimlib_extract_image(wim, image, target, extract_flags);