4 * Support for extracting WIM files.
8 * Copyright (C) 2012, 2013 Eric Biggers
10 * This file is part of wimlib, a library for working with WIM files.
12 * wimlib is free software; you can redistribute it and/or modify it under the
13 * terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 3 of the License, or (at your option)
17 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
18 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
19 * A PARTICULAR PURPOSE. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with wimlib; if not, see http://www.gnu.org/licenses/.
36 # include "timestamp.h"
37 # include <sys/time.h>
48 #include "lookup_table.h"
49 #include "wimlib_internal.h"
53 # include <ntfs-3g/volume.h>
61 static int extract_regular_file_linked(struct wim_dentry *dentry,
62 const char *output_path,
63 struct apply_args *args,
64 struct wim_lookup_table_entry *lte)
66 /* This mode overrides the normal hard-link extraction and
67 * instead either symlinks or hardlinks *all* identical files in
68 * the WIM, even if they are in a different image (in the case
69 * of a multi-image extraction) */
71 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK) {
72 if (link(lte->extracted_file, output_path) != 0) {
73 ERROR_WITH_ERRNO("Failed to hard link "
75 output_path, lte->extracted_file);
76 return WIMLIB_ERR_LINK;
79 int num_path_components;
80 int num_output_dir_path_components;
81 size_t extracted_file_len;
87 get_num_path_components(dentry->full_path_utf8) - 1;
88 num_output_dir_path_components =
89 get_num_path_components(args->target);
91 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE) {
92 num_path_components++;
93 num_output_dir_path_components--;
95 extracted_file_len = strlen(lte->extracted_file);
97 char buf[extracted_file_len + 3 * num_path_components + 1];
100 for (i = 0; i < num_path_components; i++) {
105 p2 = lte->extracted_file;
108 while (num_output_dir_path_components--)
109 p2 = path_next_part(p2, NULL);
111 if (symlink(buf, output_path) != 0) {
112 ERROR_WITH_ERRNO("Failed to symlink `%s' to "
114 buf, lte->extracted_file);
115 return WIMLIB_ERR_LINK;
121 static int symlink_apply_unix_data(const char *link,
122 const struct wimlib_unix_data *unix_data)
124 if (lchown(link, unix_data->uid, unix_data->gid)) {
125 if (errno == EPERM) {
127 WARNING_WITH_ERRNO("failed to set symlink UNIX owner/group");
129 ERROR_WITH_ERRNO("failed to set symlink UNIX owner/group");
130 return WIMLIB_ERR_INVALID_DENTRY;
136 static int fd_apply_unix_data(int fd, const struct wimlib_unix_data *unix_data)
138 if (fchown(fd, unix_data->uid, unix_data->gid)) {
139 if (errno == EPERM) {
140 WARNING_WITH_ERRNO("failed to set file UNIX owner/group");
143 ERROR_WITH_ERRNO("failed to set file UNIX owner/group");
144 return WIMLIB_ERR_INVALID_DENTRY;
148 if (fchmod(fd, unix_data->mode)) {
149 if (errno == EPERM) {
150 WARNING_WITH_ERRNO("failed to set UNIX file mode");
153 ERROR_WITH_ERRNO("failed to set UNIX file mode");
154 return WIMLIB_ERR_INVALID_DENTRY;
160 static int dir_apply_unix_data(const char *dir,
161 const struct wimlib_unix_data *unix_data)
163 int dfd = open(dir, O_RDONLY);
166 ret = fd_apply_unix_data(dfd, unix_data);
168 ERROR_WITH_ERRNO("can't close directory `%s'", dir);
169 ret = WIMLIB_ERR_MKDIR;
172 ERROR_WITH_ERRNO("can't open directory `%s'", dir);
173 ret = WIMLIB_ERR_MKDIR;
178 static int extract_regular_file_unlinked(struct wim_dentry *dentry,
179 struct apply_args *args,
180 const char *output_path,
181 struct wim_lookup_table_entry *lte)
183 /* Normal mode of extraction. Regular files and hard links are
184 * extracted in the way that they appear in the WIM. */
188 struct wim_inode *inode = dentry->d_inode;
190 if (!((args->extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE)
191 && (args->extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
192 WIMLIB_EXTRACT_FLAG_HARDLINK))))
194 /* If the dentry is part of a hard link set of at least 2
195 * dentries and one of the other dentries has already been
196 * extracted, make a hard link to the file corresponding to this
197 * already-extracted directory. Otherwise, extract the file and
198 * set the inode->i_extracted_file field so that other dentries
199 * in the hard link group can link to it. */
200 if (inode->i_nlink > 1) {
201 if (inode->i_extracted_file) {
202 DEBUG("Extracting hard link `%s' => `%s'",
203 output_path, inode->i_extracted_file);
204 if (link(inode->i_extracted_file, output_path) != 0) {
205 ERROR_WITH_ERRNO("Failed to hard link "
208 inode->i_extracted_file);
209 return WIMLIB_ERR_LINK;
213 FREE(inode->i_extracted_file);
214 inode->i_extracted_file = STRDUP(output_path);
215 if (!inode->i_extracted_file) {
216 ERROR("Failed to allocate memory for filename");
217 return WIMLIB_ERR_NOMEM;
222 /* Extract the contents of the file to @output_path. */
224 out_fd = open(output_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
226 ERROR_WITH_ERRNO("Failed to open the file `%s' for writing",
228 return WIMLIB_ERR_OPEN;
232 /* Empty file with no lookup table entry */
233 DEBUG("Empty file `%s'.", output_path);
235 goto out_extract_unix_data;
238 ret = extract_wim_resource_to_fd(lte, out_fd, wim_resource_size(lte));
240 ERROR("Failed to extract resource to `%s'", output_path);
244 out_extract_unix_data:
245 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
246 struct wimlib_unix_data unix_data;
247 ret = inode_get_unix_data(inode, &unix_data, NULL);
253 ret = fd_apply_unix_data(out_fd, &unix_data);
258 args->progress.extract.completed_bytes += wim_resource_size(lte);
260 if (close(out_fd) != 0) {
261 ERROR_WITH_ERRNO("Failed to close file `%s'", output_path);
263 ret = WIMLIB_ERR_WRITE;
268 static int extract_regular_file(struct wim_dentry *dentry,
269 struct apply_args *args,
270 const char *output_path)
272 struct wim_lookup_table_entry *lte;
273 const struct wim_inode *inode = dentry->d_inode;
275 lte = inode_unnamed_lte_resolved(inode);
277 if (lte && (args->extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
278 WIMLIB_EXTRACT_FLAG_HARDLINK)))
280 if (lte->extracted_file) {
281 return extract_regular_file_linked(dentry, output_path, args, lte);
283 lte->extracted_file = STRDUP(output_path);
284 if (!lte->extracted_file)
285 return WIMLIB_ERR_NOMEM;
288 return extract_regular_file_unlinked(dentry, args, output_path, lte);
291 static int extract_symlink(struct wim_dentry *dentry,
292 struct apply_args *args,
293 const char *output_path)
296 ssize_t ret = inode_readlink(dentry->d_inode, target,
297 sizeof(target), args->w, 0);
298 struct wim_lookup_table_entry *lte;
301 ERROR("Could not read the symbolic link from dentry `%s'",
302 dentry->full_path_utf8);
303 return WIMLIB_ERR_INVALID_DENTRY;
305 ret = symlink(target, output_path);
307 ERROR_WITH_ERRNO("Failed to symlink `%s' to `%s'",
308 output_path, target);
309 return WIMLIB_ERR_LINK;
311 lte = inode_unnamed_lte_resolved(dentry->d_inode);
312 wimlib_assert(lte != NULL);
313 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
314 struct wimlib_unix_data unix_data;
315 ret = inode_get_unix_data(dentry->d_inode, &unix_data, NULL);
321 ret = symlink_apply_unix_data(output_path, &unix_data);
325 args->progress.extract.completed_bytes += wim_resource_size(lte);
329 #endif /* !__WIN32__ */
331 static int extract_directory(struct wim_dentry *dentry,
332 const char *output_path, bool is_root)
337 ret = stat(output_path, &stbuf);
339 if (S_ISDIR(stbuf.st_mode)) {
341 /*WARNING("`%s' already exists", output_path);*/
344 ERROR("`%s' is not a directory", output_path);
345 return WIMLIB_ERR_MKDIR;
348 if (errno != ENOENT) {
349 ERROR_WITH_ERRNO("Failed to stat `%s'", output_path);
350 return WIMLIB_ERR_STAT;
353 if (mkdir(output_path, S_IRWXU | S_IRGRP | S_IXGRP |
354 S_IROTH | S_IXOTH) != 0) {
355 ERROR_WITH_ERRNO("Cannot create directory `%s'",
357 return WIMLIB_ERR_MKDIR;
363 struct wimlib_unix_data unix_data;
364 ret = inode_get_unix_data(dentry->d_inode, &unix_data, NULL);
370 ret = dir_apply_unix_data(output_path, &unix_data);
377 static int unix_do_apply_dentry(const char *output_path,
378 size_t output_path_len,
379 struct wim_dentry *dentry,
380 struct apply_args *args)
382 const struct wim_inode *inode = dentry->d_inode;
384 if (inode_is_symlink(inode))
385 return extract_symlink(dentry, args, output_path);
386 else if (inode_is_directory(inode))
387 return extract_directory((args->extract_flags &
388 WIMLIB_EXTRACT_FLAG_UNIX_DATA) ? dentry : NULL,
391 return extract_regular_file(dentry, args, output_path);
394 static int unix_do_apply_dentry_timestamps(const char *output_path,
395 size_t output_path_len,
396 const struct wim_dentry *dentry,
397 struct apply_args *args)
400 const struct wim_inode *inode = dentry->d_inode;
402 #ifdef HAVE_UTIMENSAT
403 /* Convert the WIM timestamps, which are accurate to 100 nanoseconds,
404 * into `struct timespec's for passing to utimensat(), which is accurate
405 * to 1 nanosecond. */
407 struct timespec ts[2];
408 ts[0] = wim_timestamp_to_timespec(inode->i_last_access_time);
409 ts[1] = wim_timestamp_to_timespec(inode->i_last_write_time);
410 ret = utimensat(AT_FDCWD, output_path, ts, AT_SYMLINK_NOFOLLOW);
418 /* utimensat() not implemented or not available */
420 /* Convert the WIM timestamps, which are accurate to 100
421 * nanoseconds, into `struct timeval's for passing to lutimes(),
422 * which is accurate to 1 microsecond. */
423 struct timeval tv[2];
424 tv[0] = wim_timestamp_to_timeval(inode->i_last_access_time);
425 tv[1] = wim_timestamp_to_timeval(inode->i_last_write_time);
426 ret = lutimes(output_path, tv);
433 /* utimensat() and lutimes() both not implemented or not
436 /* Convert the WIM timestamps, which are accurate to 100
437 * nanoseconds, into a `struct utimbuf's for passing to
438 * utime(), which is accurate to 1 second. */
440 buf.actime = wim_timestamp_to_unix(inode->i_last_access_time);
441 buf.modtime = wim_timestamp_to_unix(inode->i_last_write_time);
442 ret = utime(output_path, &buf);
445 if (ret && args->num_utime_warnings < 10) {
446 WARNING_WITH_ERRNO("Failed to set timestamp on file `%s'",
448 args->num_utime_warnings++;
452 #endif /* !__WIN32__ */
454 /* Extracts a file, directory, or symbolic link from the WIM archive. */
455 static int apply_dentry_normal(struct wim_dentry *dentry, void *arg)
457 struct apply_args *args = arg;
461 len = strlen(args->target);
462 if (dentry_is_root(dentry)) {
463 output_path = (char*)args->target;
465 output_path = alloca(len + dentry->full_path_utf8_len + 1);
466 memcpy(output_path, args->target, len);
467 memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
468 output_path[len + dentry->full_path_utf8_len] = '\0';
469 len += dentry->full_path_utf8_len;
472 return win32_do_apply_dentry(output_path, len, dentry, args);
474 return unix_do_apply_dentry(output_path, len, dentry, args);
479 /* Apply timestamps to an extracted file or directory */
480 static int apply_dentry_timestamps_normal(struct wim_dentry *dentry, void *arg)
482 struct apply_args *args = arg;
486 len = strlen(args->target);
487 if (dentry_is_root(dentry)) {
488 output_path = (char*)args->target;
490 output_path = alloca(len + dentry->full_path_utf8_len + 1);
491 memcpy(output_path, args->target, len);
492 memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
493 output_path[len + dentry->full_path_utf8_len] = '\0';
494 len += dentry->full_path_utf8_len;
497 return win32_do_apply_dentry_timestamps(output_path, len, dentry, args);
499 return unix_do_apply_dentry_timestamps(output_path, len, dentry, args);
503 /* Extract a dentry if it hasn't already been extracted, and either the dentry
504 * has no streams or WIMLIB_EXTRACT_FLAG_NO_STREAMS is not specified. */
505 static int maybe_apply_dentry(struct wim_dentry *dentry, void *arg)
507 struct apply_args *args = arg;
510 if (dentry->is_extracted)
513 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_STREAMS)
514 if (inode_unnamed_lte_resolved(dentry->d_inode))
517 if ((args->extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) &&
518 args->progress_func) {
519 args->progress.extract.cur_path = dentry->full_path_utf8;
520 args->progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DENTRY,
523 ret = args->apply_dentry(dentry, args);
525 dentry->is_extracted = 1;
529 static int cmp_streams_by_wim_position(const void *p1, const void *p2)
531 const struct wim_lookup_table_entry *lte1, *lte2;
532 lte1 = *(const struct wim_lookup_table_entry**)p1;
533 lte2 = *(const struct wim_lookup_table_entry**)p2;
534 if (lte1->resource_entry.offset < lte2->resource_entry.offset)
536 else if (lte1->resource_entry.offset > lte2->resource_entry.offset)
542 static int sort_stream_list_by_wim_position(struct list_head *stream_list)
544 struct list_head *cur;
546 struct wim_lookup_table_entry **array;
551 list_for_each(cur, stream_list)
553 array_size = num_streams * sizeof(array[0]);
554 array = MALLOC(array_size);
556 ERROR("Failed to allocate %zu bytes to sort stream entries",
558 return WIMLIB_ERR_NOMEM;
560 cur = stream_list->next;
561 for (i = 0; i < num_streams; i++) {
562 array[i] = container_of(cur, struct wim_lookup_table_entry, staging_list);
566 qsort(array, num_streams, sizeof(array[0]), cmp_streams_by_wim_position);
568 INIT_LIST_HEAD(stream_list);
569 for (i = 0; i < num_streams; i++)
570 list_add_tail(&array[i]->staging_list, stream_list);
575 static void calculate_bytes_to_extract(struct list_head *stream_list,
577 union wimlib_progress_info *progress)
579 struct wim_lookup_table_entry *lte;
583 /* For each stream to be extracted... */
584 list_for_each_entry(lte, stream_list, staging_list) {
586 (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
588 /* In the symlink or hard link extraction mode, each
589 * stream will be extracted one time regardless of how
590 * many dentries share the stream. */
591 wimlib_assert(!(extract_flags & WIMLIB_EXTRACT_FLAG_NTFS));
592 if (!lte->extracted_file) {
594 total_bytes += wim_resource_size(lte);
597 num_streams += lte->out_refcnt;
598 total_bytes += lte->out_refcnt * wim_resource_size(lte);
601 progress->extract.num_streams = num_streams;
602 progress->extract.total_bytes = total_bytes;
603 progress->extract.completed_bytes = 0;
606 static void maybe_add_stream_for_extraction(struct wim_lookup_table_entry *lte,
607 struct list_head *stream_list)
609 if (++lte->out_refcnt == 1) {
610 INIT_LIST_HEAD(<e->inode_list);
611 list_add_tail(<e->staging_list, stream_list);
615 static void inode_find_streams_for_extraction(struct wim_inode *inode,
616 struct list_head *stream_list,
619 struct wim_lookup_table_entry *lte;
620 bool inode_added = false;
622 lte = inode_unnamed_lte_resolved(inode);
624 maybe_add_stream_for_extraction(lte, stream_list);
625 list_add_tail(&inode->i_lte_inode_list, <e->inode_list);
629 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
630 for (unsigned i = 0; i < inode->i_num_ads; i++) {
631 if (inode->i_ads_entries[i].stream_name_len != 0) {
632 lte = inode->i_ads_entries[i].lte;
634 maybe_add_stream_for_extraction(lte,
637 list_add_tail(&inode->i_lte_inode_list,
648 static void find_streams_for_extraction(struct hlist_head *inode_list,
649 struct list_head *stream_list,
650 struct wim_lookup_table *lookup_table,
653 struct wim_inode *inode;
654 struct hlist_node *cur;
655 struct wim_dentry *dentry;
657 for_lookup_table_entry(lookup_table, lte_zero_out_refcnt, NULL);
658 INIT_LIST_HEAD(stream_list);
659 hlist_for_each_entry(inode, cur, inode_list, i_hlist) {
660 if (!inode->i_resolved)
661 inode_resolve_ltes(inode, lookup_table);
662 inode_for_each_dentry(dentry, inode)
663 dentry->is_extracted = 0;
664 inode_find_streams_for_extraction(inode, stream_list,
669 struct apply_operations {
670 int (*apply_dentry)(struct wim_dentry *dentry, void *arg);
671 int (*apply_dentry_timestamps)(struct wim_dentry *dentry, void *arg);
674 static const struct apply_operations normal_apply_operations = {
675 .apply_dentry = apply_dentry_normal,
676 .apply_dentry_timestamps = apply_dentry_timestamps_normal,
680 static const struct apply_operations ntfs_apply_operations = {
681 .apply_dentry = apply_dentry_ntfs,
682 .apply_dentry_timestamps = apply_dentry_timestamps_ntfs,
686 static int apply_stream_list(struct list_head *stream_list,
687 struct apply_args *args,
688 const struct apply_operations *ops,
689 wimlib_progress_func_t progress_func)
691 uint64_t bytes_per_progress = args->progress.extract.total_bytes / 100;
692 uint64_t next_progress = bytes_per_progress;
693 struct wim_lookup_table_entry *lte;
694 struct wim_inode *inode;
695 struct wim_dentry *dentry;
698 /* This complicated loop is essentially looping through the dentries,
699 * although dentries may be visited more than once (if a dentry contains
700 * two different nonempty streams) or not at all (if a dentry contains
701 * no non-empty streams).
703 * The outer loop is over the distinct streams to be extracted so that
704 * sequential reading of the WIM can be implemented. */
706 /* For each distinct stream to be extracted */
707 list_for_each_entry(lte, stream_list, staging_list) {
708 /* For each inode that contains the stream */
709 list_for_each_entry(inode, <e->inode_list, i_lte_inode_list) {
710 /* For each dentry that points to the inode */
711 inode_for_each_dentry(dentry, inode) {
712 /* Extract the dentry if it was not already
714 ret = maybe_apply_dentry(dentry, args);
718 args->progress.extract.completed_bytes >= next_progress)
720 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS,
722 if (args->progress.extract.completed_bytes >=
723 args->progress.extract.total_bytes)
725 next_progress = ~0ULL;
728 min (args->progress.extract.completed_bytes +
730 args->progress.extract.total_bytes);
739 /* Extracts the image @image from the WIM @w to the directory or NTFS volume
741 static int extract_single_image(WIMStruct *w, int image,
742 const char *target, int extract_flags,
743 wimlib_progress_func_t progress_func)
746 struct list_head stream_list;
747 struct hlist_head *inode_list;
749 struct apply_args args;
750 const struct apply_operations *ops;
753 args.target = target;
754 args.extract_flags = extract_flags;
755 args.num_utime_warnings = 0;
756 args.stream_list = &stream_list;
757 args.progress_func = progress_func;
760 args.progress.extract.wimfile_name = w->filename;
761 args.progress.extract.image = image;
762 args.progress.extract.extract_flags = (extract_flags &
763 WIMLIB_EXTRACT_MASK_PUBLIC);
764 args.progress.extract.image_name = wimlib_get_image_name(w, image);
765 args.progress.extract.target = target;
769 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
770 args.vol = ntfs_mount(target, 0);
772 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", target);
773 return WIMLIB_ERR_NTFS_3G;
775 ops = &ntfs_apply_operations;
778 ops = &normal_apply_operations;
780 ret = select_wim_image(w, image);
784 inode_list = &w->image_metadata[image - 1].inode_list;
786 /* Build a list of the streams that need to be extracted */
787 find_streams_for_extraction(inode_list, &stream_list,
788 w->lookup_table, extract_flags);
790 /* Calculate the number of bytes of data that will be extracted */
791 calculate_bytes_to_extract(&stream_list, extract_flags,
795 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN,
799 /* If a sequential extraction was specified, sort the streams to be
800 * extracted by their position in the WIM file, so that the WIM file can
801 * be read sequentially. */
802 if (extract_flags & WIMLIB_EXTRACT_FLAG_SEQUENTIAL) {
803 ret = sort_stream_list_by_wim_position(&stream_list);
805 WARNING("Falling back to non-sequential extraction");
806 extract_flags &= ~WIMLIB_EXTRACT_FLAG_SEQUENTIAL;
811 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN,
815 /* Make the directory structure and extract empty files */
816 args.extract_flags |= WIMLIB_EXTRACT_FLAG_NO_STREAMS;
817 args.apply_dentry = ops->apply_dentry;
818 ret = for_dentry_in_tree(wim_root_dentry(w), maybe_apply_dentry, &args);
819 args.extract_flags &= ~WIMLIB_EXTRACT_FLAG_NO_STREAMS;
824 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END,
828 /* Extract non-empty files */
829 ret = apply_stream_list(&stream_list, &args, ops, progress_func);
834 progress_func(WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS,
838 /* Apply timestamps */
839 ret = for_dentry_in_tree_depth(wim_root_dentry(w),
840 ops->apply_dentry_timestamps, &args);
845 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END,
850 /* Unmount the NTFS volume */
851 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
852 if (ntfs_umount(args.vol, FALSE) != 0) {
853 ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", args.target);
855 ret = WIMLIB_ERR_NTFS_3G;
863 /* Extracts all images from the WIM to the directory @target, with the images
864 * placed in subdirectories named by their image names. */
865 static int extract_all_images(WIMStruct *w, const char *target,
867 wimlib_progress_func_t progress_func)
869 size_t image_name_max_len = max(xml_get_max_image_name_len(w), 20);
870 size_t output_path_len = strlen(target);
871 char buf[output_path_len + 1 + image_name_max_len + 1];
874 const char *image_name;
876 ret = extract_directory(NULL, target, true);
880 memcpy(buf, target, output_path_len);
881 buf[output_path_len] = '/';
882 for (image = 1; image <= w->hdr.image_count; image++) {
883 image_name = wimlib_get_image_name(w, image);
884 if (image_name && *image_name) {
885 strcpy(buf + output_path_len + 1, image_name);
887 /* Image name is empty. Use image number instead */
888 sprintf(buf + output_path_len + 1, "%d", image);
890 ret = extract_single_image(w, image, buf, extract_flags,
898 /* Extracts a single image or all images from a WIM file to a directory or NTFS
900 WIMLIBAPI int wimlib_extract_image(WIMStruct *w,
904 WIMStruct **additional_swms,
905 unsigned num_additional_swms,
906 wimlib_progress_func_t progress_func)
908 struct wim_lookup_table *joined_tab, *w_tab_save;
912 return WIMLIB_ERR_INVALID_PARAM;
914 extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC;
916 if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
917 == (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
918 return WIMLIB_ERR_INVALID_PARAM;
921 if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
922 ERROR("Extracting UNIX data is not supported on Windows");
923 return WIMLIB_ERR_INVALID_PARAM;
925 if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
926 ERROR("Linked extraction modes are not supported on Windows");
927 return WIMLIB_ERR_INVALID_PARAM;
931 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
933 if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))) {
934 ERROR("Cannot specify symlink or hardlink flags when applying\n"
935 " directly to a NTFS volume");
936 return WIMLIB_ERR_INVALID_PARAM;
938 if (image == WIMLIB_ALL_IMAGES) {
939 ERROR("Can only apply a single image when applying "
940 "directly to a NTFS volume");
941 return WIMLIB_ERR_INVALID_PARAM;
943 if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
944 ERROR("Cannot restore UNIX-specific data in the NTFS extraction mode");
945 return WIMLIB_ERR_INVALID_PARAM;
948 ERROR("wimlib was compiled without support for NTFS-3g, so");
949 ERROR("we cannot apply a WIM image directly to a NTFS volume");
950 return WIMLIB_ERR_UNSUPPORTED;
954 ret = verify_swm_set(w, additional_swms, num_additional_swms);
958 if (num_additional_swms) {
959 ret = new_joined_lookup_table(w, additional_swms,
960 num_additional_swms, &joined_tab);
963 w_tab_save = w->lookup_table;
964 w->lookup_table = joined_tab;
968 win32_acquire_restore_privileges();
970 if (image == WIMLIB_ALL_IMAGES) {
971 extract_flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
972 ret = extract_all_images(w, target, extract_flags,
975 extract_flags &= ~WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
976 ret = extract_single_image(w, image, target, extract_flags,
980 win32_release_restore_privileges();
983 if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
984 WIMLIB_EXTRACT_FLAG_HARDLINK))
986 for_lookup_table_entry(w->lookup_table,
987 lte_free_extracted_file,
991 if (num_additional_swms) {
992 free_lookup_table(w->lookup_table);
993 w->lookup_table = w_tab_save;