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>
62 /* Returns the number of components of @path. */
64 get_num_path_components(const char *path)
66 unsigned num_components = 0;
72 while (*path && *path != '/')
75 return num_components;
79 path_next_part(const char *path)
81 while (*path && *path != '/')
83 while (*path && *path == '/')
89 extract_regular_file_linked(struct wim_dentry *dentry,
90 const char *output_path,
91 struct apply_args *args,
92 struct wim_lookup_table_entry *lte)
94 /* This mode overrides the normal hard-link extraction and
95 * instead either symlinks or hardlinks *all* identical files in
96 * the WIM, even if they are in a different image (in the case
97 * of a multi-image extraction) */
99 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK) {
100 if (link(lte->extracted_file, output_path) != 0) {
101 ERROR_WITH_ERRNO("Failed to hard link "
103 output_path, lte->extracted_file);
104 return WIMLIB_ERR_LINK;
107 int num_path_components;
108 int num_output_dir_path_components;
109 size_t extracted_file_len;
114 num_path_components =
115 get_num_path_components(dentry_full_path(dentry)) - 1;
116 num_output_dir_path_components =
117 get_num_path_components(args->target);
119 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE) {
120 num_path_components++;
121 num_output_dir_path_components--;
123 extracted_file_len = strlen(lte->extracted_file);
125 char buf[extracted_file_len + 3 * num_path_components + 1];
128 for (i = 0; i < num_path_components; i++) {
133 p2 = lte->extracted_file;
136 while (num_output_dir_path_components > 0) {
137 p2 = path_next_part(p2);
138 num_output_dir_path_components--;
141 if (symlink(buf, output_path) != 0) {
142 ERROR_WITH_ERRNO("Failed to symlink `%s' to `%s'",
143 buf, lte->extracted_file);
144 return WIMLIB_ERR_LINK;
151 symlink_apply_unix_data(const char *link,
152 const struct wimlib_unix_data *unix_data)
154 if (lchown(link, unix_data->uid, unix_data->gid)) {
155 if (errno == EPERM) {
157 WARNING_WITH_ERRNO("failed to set symlink UNIX owner/group");
159 ERROR_WITH_ERRNO("failed to set symlink UNIX owner/group");
160 return WIMLIB_ERR_INVALID_DENTRY;
167 fd_apply_unix_data(int fd, const struct wimlib_unix_data *unix_data)
169 if (fchown(fd, unix_data->uid, unix_data->gid)) {
170 if (errno == EPERM) {
171 WARNING_WITH_ERRNO("failed to set file UNIX owner/group");
174 ERROR_WITH_ERRNO("failed to set file UNIX owner/group");
175 return WIMLIB_ERR_INVALID_DENTRY;
179 if (fchmod(fd, unix_data->mode)) {
180 if (errno == EPERM) {
181 WARNING_WITH_ERRNO("failed to set UNIX file mode");
184 ERROR_WITH_ERRNO("failed to set UNIX file mode");
185 return WIMLIB_ERR_INVALID_DENTRY;
192 dir_apply_unix_data(const char *dir, const struct wimlib_unix_data *unix_data)
194 int dfd = open(dir, O_RDONLY);
197 ret = fd_apply_unix_data(dfd, unix_data);
199 ERROR_WITH_ERRNO("can't close directory `%s'", dir);
200 ret = WIMLIB_ERR_MKDIR;
203 ERROR_WITH_ERRNO("can't open directory `%s'", dir);
204 ret = WIMLIB_ERR_MKDIR;
210 extract_regular_file_unlinked(struct wim_dentry *dentry,
211 struct apply_args *args,
212 const char *output_path,
213 struct wim_lookup_table_entry *lte)
215 /* Normal mode of extraction. Regular files and hard links are
216 * extracted in the way that they appear in the WIM. */
220 struct wim_inode *inode = dentry->d_inode;
222 if (!((args->extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE)
223 && (args->extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
224 WIMLIB_EXTRACT_FLAG_HARDLINK))))
226 /* If the dentry is part of a hard link set of at least 2
227 * dentries and one of the other dentries has already been
228 * extracted, make a hard link to the file corresponding to this
229 * already-extracted directory. Otherwise, extract the file and
230 * set the inode->i_extracted_file field so that other dentries
231 * in the hard link group can link to it. */
232 if (inode->i_nlink > 1) {
233 if (inode->i_extracted_file) {
234 DEBUG("Extracting hard link `%s' => `%s'",
235 output_path, inode->i_extracted_file);
236 if (link(inode->i_extracted_file, output_path) != 0) {
237 ERROR_WITH_ERRNO("Failed to hard link "
240 inode->i_extracted_file);
241 return WIMLIB_ERR_LINK;
245 FREE(inode->i_extracted_file);
246 inode->i_extracted_file = STRDUP(output_path);
247 if (!inode->i_extracted_file) {
248 ERROR("Failed to allocate memory for filename");
249 return WIMLIB_ERR_NOMEM;
254 /* Extract the contents of the file to @output_path. */
256 out_fd = open(output_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
258 ERROR_WITH_ERRNO("Failed to open the file `%s' for writing",
260 return WIMLIB_ERR_OPEN;
264 /* Empty file with no lookup table entry */
265 DEBUG("Empty file `%s'.", output_path);
267 goto out_extract_unix_data;
270 ret = extract_wim_resource_to_fd(lte, out_fd, wim_resource_size(lte));
272 ERROR("Failed to extract resource to `%s'", output_path);
276 out_extract_unix_data:
277 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
278 struct wimlib_unix_data unix_data;
279 ret = inode_get_unix_data(inode, &unix_data, NULL);
285 ret = fd_apply_unix_data(out_fd, &unix_data);
290 args->progress.extract.completed_bytes += wim_resource_size(lte);
292 if (close(out_fd) != 0) {
293 ERROR_WITH_ERRNO("Failed to close file `%s'", output_path);
295 ret = WIMLIB_ERR_WRITE;
301 extract_regular_file(struct wim_dentry *dentry,
302 struct apply_args *args,
303 const char *output_path)
305 struct wim_lookup_table_entry *lte;
306 const struct wim_inode *inode = dentry->d_inode;
308 lte = inode_unnamed_lte_resolved(inode);
310 if (lte && (args->extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
311 WIMLIB_EXTRACT_FLAG_HARDLINK)))
313 if (lte->extracted_file) {
314 return extract_regular_file_linked(dentry, output_path, args, lte);
316 lte->extracted_file = STRDUP(output_path);
317 if (!lte->extracted_file)
318 return WIMLIB_ERR_NOMEM;
321 return extract_regular_file_unlinked(dentry, args, output_path, lte);
325 extract_symlink(struct wim_dentry *dentry,
326 struct apply_args *args,
327 const char *output_path)
330 ssize_t ret = inode_readlink(dentry->d_inode, target,
331 sizeof(target), args->w, false);
332 struct wim_lookup_table_entry *lte;
335 ERROR("Could not read the symbolic link from dentry `%s'",
336 dentry_full_path(dentry));
337 return WIMLIB_ERR_INVALID_DENTRY;
339 ret = symlink(target, output_path);
341 ERROR_WITH_ERRNO("Failed to symlink `%s' to `%s'",
342 output_path, target);
343 return WIMLIB_ERR_LINK;
345 lte = inode_unnamed_lte_resolved(dentry->d_inode);
346 wimlib_assert(lte != NULL);
347 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
348 struct wimlib_unix_data unix_data;
349 ret = inode_get_unix_data(dentry->d_inode, &unix_data, NULL);
355 ret = symlink_apply_unix_data(output_path, &unix_data);
359 args->progress.extract.completed_bytes += wim_resource_size(lte);
363 #endif /* !__WIN32__ */
366 extract_directory(struct wim_dentry *dentry,
367 const tchar *output_path, bool is_root)
372 ret = tstat(output_path, &stbuf);
374 if (S_ISDIR(stbuf.st_mode)) {
376 /*WARNING("`%s' already exists", output_path);*/
379 ERROR("`%"TS"' is not a directory", output_path);
380 return WIMLIB_ERR_MKDIR;
383 if (errno != ENOENT) {
384 ERROR_WITH_ERRNO("Failed to stat `%"TS"'", output_path);
385 return WIMLIB_ERR_STAT;
389 if (tmkdir(output_path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH))
391 ERROR_WITH_ERRNO("Cannot create directory `%"TS"'", output_path);
392 return WIMLIB_ERR_MKDIR;
398 struct wimlib_unix_data unix_data;
399 ret = inode_get_unix_data(dentry->d_inode, &unix_data, NULL);
405 ret = dir_apply_unix_data(output_path, &unix_data);
412 static int unix_do_apply_dentry(const char *output_path,
413 size_t output_path_len,
414 struct wim_dentry *dentry,
415 struct apply_args *args)
417 const struct wim_inode *inode = dentry->d_inode;
419 if (inode_is_symlink(inode))
420 return extract_symlink(dentry, args, output_path);
421 else if (inode_is_directory(inode))
422 return extract_directory((args->extract_flags &
423 WIMLIB_EXTRACT_FLAG_UNIX_DATA) ? dentry : NULL,
426 return extract_regular_file(dentry, args, output_path);
430 unix_do_apply_dentry_timestamps(const char *output_path,
431 size_t output_path_len,
432 const struct wim_dentry *dentry,
433 struct apply_args *args)
436 const struct wim_inode *inode = dentry->d_inode;
438 #ifdef HAVE_UTIMENSAT
439 /* Convert the WIM timestamps, which are accurate to 100 nanoseconds,
440 * into `struct timespec's for passing to utimensat(), which is accurate
441 * to 1 nanosecond. */
443 struct timespec ts[2];
444 ts[0] = wim_timestamp_to_timespec(inode->i_last_access_time);
445 ts[1] = wim_timestamp_to_timespec(inode->i_last_write_time);
446 ret = utimensat(AT_FDCWD, output_path, ts, AT_SYMLINK_NOFOLLOW);
454 /* utimensat() not implemented or not available */
456 /* Convert the WIM timestamps, which are accurate to 100
457 * nanoseconds, into `struct timeval's for passing to lutimes(),
458 * which is accurate to 1 microsecond. */
459 struct timeval tv[2];
460 tv[0] = wim_timestamp_to_timeval(inode->i_last_access_time);
461 tv[1] = wim_timestamp_to_timeval(inode->i_last_write_time);
462 ret = lutimes(output_path, tv);
469 /* utimensat() and lutimes() both not implemented or not
472 /* Convert the WIM timestamps, which are accurate to 100
473 * nanoseconds, into a `struct utimbuf's for passing to
474 * utime(), which is accurate to 1 second. */
476 buf.actime = wim_timestamp_to_unix(inode->i_last_access_time);
477 buf.modtime = wim_timestamp_to_unix(inode->i_last_write_time);
478 ret = utime(output_path, &buf);
481 if (ret && args->num_utime_warnings < 10) {
482 WARNING_WITH_ERRNO("Failed to set timestamp on file `%s'",
484 args->num_utime_warnings++;
488 #endif /* !__WIN32__ */
490 /* Extracts a file, directory, or symbolic link from the WIM archive. */
492 apply_dentry_normal(struct wim_dentry *dentry, void *arg)
494 struct apply_args *args = arg;
498 len = tstrlen(args->target);
499 if (dentry_is_root(dentry)) {
500 output_path = (tchar*)args->target;
502 if (!dentry_full_path(dentry))
503 return WIMLIB_ERR_NOMEM;
504 output_path = alloca(len * sizeof(tchar) + dentry->full_path_nbytes +
506 memcpy(output_path, args->target, len * sizeof(tchar));
507 memcpy(output_path + len, dentry->_full_path, dentry->full_path_nbytes);
508 len += dentry->full_path_nbytes / sizeof(tchar);
509 output_path[len] = T('\0');
512 return win32_do_apply_dentry(output_path, len, dentry, args);
514 return unix_do_apply_dentry(output_path, len, dentry, args);
519 /* Apply timestamps to an extracted file or directory */
521 apply_dentry_timestamps_normal(struct wim_dentry *dentry, void *arg)
523 struct apply_args *args = arg;
527 len = tstrlen(args->target);
528 if (dentry_is_root(dentry)) {
529 output_path = (tchar*)args->target;
531 if (!dentry_full_path(dentry))
532 return WIMLIB_ERR_NOMEM;
533 output_path = alloca(len * sizeof(tchar) + dentry->full_path_nbytes +
535 memcpy(output_path, args->target, len * sizeof(tchar));
536 memcpy(output_path + len, dentry->_full_path, dentry->full_path_nbytes);
537 len += dentry->full_path_nbytes / sizeof(tchar);
538 output_path[len] = T('\0');
543 return win32_do_apply_dentry_timestamps(output_path, len, dentry, args);
545 return unix_do_apply_dentry_timestamps(output_path, len, dentry, args);
549 /* Extract a dentry if it hasn't already been extracted, and either the dentry
550 * has no streams or WIMLIB_EXTRACT_FLAG_NO_STREAMS is not specified. */
552 maybe_apply_dentry(struct wim_dentry *dentry, void *arg)
554 struct apply_args *args = arg;
557 if (dentry->is_extracted)
560 if (!dentry_full_path(dentry))
561 return WIMLIB_ERR_NOMEM;
563 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_STREAMS)
564 if (inode_unnamed_lte_resolved(dentry->d_inode))
567 if ((args->extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) &&
568 args->progress_func) {
569 args->progress.extract.cur_path = dentry_full_path(dentry);
570 args->progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DENTRY,
573 ret = args->apply_dentry(dentry, args);
575 dentry->is_extracted = 1;
580 calculate_bytes_to_extract(struct list_head *stream_list,
582 union wimlib_progress_info *progress)
584 struct wim_lookup_table_entry *lte;
588 /* For each stream to be extracted... */
589 list_for_each_entry(lte, stream_list, extraction_list) {
591 (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
593 /* In the symlink or hard link extraction mode, each
594 * stream will be extracted one time regardless of how
595 * many dentries share the stream. */
596 wimlib_assert(!(extract_flags & WIMLIB_EXTRACT_FLAG_NTFS));
597 if (!lte->extracted_file) {
599 total_bytes += wim_resource_size(lte);
602 num_streams += lte->out_refcnt;
603 total_bytes += lte->out_refcnt * wim_resource_size(lte);
606 progress->extract.num_streams = num_streams;
607 progress->extract.total_bytes = total_bytes;
608 progress->extract.completed_bytes = 0;
612 maybe_add_stream_for_extraction(struct wim_lookup_table_entry *lte,
613 struct list_head *stream_list)
615 if (++lte->out_refcnt == 1) {
616 INIT_LIST_HEAD(<e->inode_list);
617 list_add_tail(<e->extraction_list, stream_list);
622 inode_find_streams_for_extraction(struct wim_inode *inode,
623 struct list_head *stream_list,
626 struct wim_lookup_table_entry *lte;
627 bool inode_added = false;
629 lte = inode_unnamed_lte_resolved(inode);
631 maybe_add_stream_for_extraction(lte, stream_list);
632 list_add_tail(&inode->i_lte_inode_list, <e->inode_list);
636 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
637 for (unsigned i = 0; i < inode->i_num_ads; i++) {
638 if (inode->i_ads_entries[i].stream_name_nbytes != 0) {
639 lte = inode->i_ads_entries[i].lte;
641 maybe_add_stream_for_extraction(lte,
644 list_add_tail(&inode->i_lte_inode_list,
656 find_streams_for_extraction(struct wim_image_metadata *imd,
657 struct list_head *stream_list,
658 struct wim_lookup_table *lookup_table,
661 struct wim_inode *inode;
662 struct wim_dentry *dentry;
664 for_lookup_table_entry(lookup_table, lte_zero_out_refcnt, NULL);
665 INIT_LIST_HEAD(stream_list);
666 image_for_each_inode(inode, imd) {
667 if (!inode->i_resolved)
668 inode_resolve_ltes(inode, lookup_table);
669 inode_for_each_dentry(dentry, inode)
670 dentry->is_extracted = 0;
671 inode_find_streams_for_extraction(inode, stream_list,
676 struct apply_operations {
677 int (*apply_dentry)(struct wim_dentry *dentry, void *arg);
678 int (*apply_dentry_timestamps)(struct wim_dentry *dentry, void *arg);
681 static const struct apply_operations normal_apply_operations = {
682 .apply_dentry = apply_dentry_normal,
683 .apply_dentry_timestamps = apply_dentry_timestamps_normal,
687 static const struct apply_operations ntfs_apply_operations = {
688 .apply_dentry = apply_dentry_ntfs,
689 .apply_dentry_timestamps = apply_dentry_timestamps_ntfs,
694 apply_stream_list(struct list_head *stream_list,
695 struct apply_args *args,
696 const struct apply_operations *ops,
697 wimlib_progress_func_t progress_func)
699 uint64_t bytes_per_progress = args->progress.extract.total_bytes / 100;
700 uint64_t next_progress = bytes_per_progress;
701 struct wim_lookup_table_entry *lte;
702 struct wim_inode *inode;
703 struct wim_dentry *dentry;
706 /* This complicated loop is essentially looping through the dentries,
707 * although dentries may be visited more than once (if a dentry contains
708 * two different nonempty streams) or not at all (if a dentry contains
709 * no non-empty streams).
711 * The outer loop is over the distinct streams to be extracted so that
712 * sequential reading of the WIM can be implemented. */
714 /* For each distinct stream to be extracted */
715 list_for_each_entry(lte, stream_list, extraction_list) {
716 /* For each inode that contains the stream */
717 list_for_each_entry(inode, <e->inode_list, i_lte_inode_list) {
718 /* For each dentry that points to the inode */
719 inode_for_each_dentry(dentry, inode) {
720 /* Extract the dentry if it was not already
722 ret = maybe_apply_dentry(dentry, args);
726 args->progress.extract.completed_bytes >= next_progress)
728 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS,
730 if (args->progress.extract.completed_bytes >=
731 args->progress.extract.total_bytes)
733 next_progress = ~0ULL;
736 min (args->progress.extract.completed_bytes +
738 args->progress.extract.total_bytes);
748 sort_stream_list_by_wim_position(struct list_head *stream_list)
750 struct list_head *cur;
752 struct wim_lookup_table_entry **array;
757 list_for_each(cur, stream_list)
759 array_size = num_streams * sizeof(array[0]);
760 array = MALLOC(array_size);
762 ERROR("Failed to allocate %zu bytes to sort stream entries",
764 return WIMLIB_ERR_NOMEM;
766 cur = stream_list->next;
767 for (i = 0; i < num_streams; i++) {
768 array[i] = container_of(cur, struct wim_lookup_table_entry, extraction_list);
772 qsort(array, num_streams, sizeof(array[0]), cmp_streams_by_wim_position);
774 INIT_LIST_HEAD(stream_list);
775 for (i = 0; i < num_streams; i++)
776 list_add_tail(&array[i]->extraction_list, stream_list);
782 /* Extracts the image @image from the WIM @w to the directory or NTFS volume
785 extract_single_image(WIMStruct *w, int image,
786 const tchar *target, int extract_flags,
787 wimlib_progress_func_t progress_func)
790 struct list_head stream_list;
792 struct apply_args args;
793 const struct apply_operations *ops;
795 memset(&args, 0, sizeof(args));
798 args.target = target;
799 args.extract_flags = extract_flags;
800 args.progress_func = progress_func;
803 args.progress.extract.wimfile_name = w->filename;
804 args.progress.extract.image = image;
805 args.progress.extract.extract_flags = (extract_flags &
806 WIMLIB_EXTRACT_MASK_PUBLIC);
807 args.progress.extract.image_name = wimlib_get_image_name(w, image);
808 args.progress.extract.target = target;
812 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
813 args.vol = ntfs_mount(target, 0);
815 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%"TS"'",
817 return WIMLIB_ERR_NTFS_3G;
819 ops = &ntfs_apply_operations;
822 ops = &normal_apply_operations;
824 ret = select_wim_image(w, image);
828 /* Build a list of the streams that need to be extracted */
829 find_streams_for_extraction(wim_get_current_image_metadata(w),
831 w->lookup_table, extract_flags);
833 /* Calculate the number of bytes of data that will be extracted */
834 calculate_bytes_to_extract(&stream_list, extract_flags,
838 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN,
842 /* If a sequential extraction was specified, sort the streams to be
843 * extracted by their position in the WIM file, so that the WIM file can
844 * be read sequentially. */
845 if (extract_flags & WIMLIB_EXTRACT_FLAG_SEQUENTIAL) {
846 ret = sort_stream_list_by_wim_position(&stream_list);
848 WARNING("Falling back to non-sequential extraction");
849 extract_flags &= ~WIMLIB_EXTRACT_FLAG_SEQUENTIAL;
854 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN,
858 /* Make the directory structure and extract empty files */
859 args.extract_flags |= WIMLIB_EXTRACT_FLAG_NO_STREAMS;
860 args.apply_dentry = ops->apply_dentry;
861 ret = for_dentry_in_tree(wim_root_dentry(w), maybe_apply_dentry, &args);
862 args.extract_flags &= ~WIMLIB_EXTRACT_FLAG_NO_STREAMS;
867 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END,
871 /* Extract non-empty files */
872 ret = apply_stream_list(&stream_list, &args, ops, progress_func);
877 progress_func(WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS,
881 /* Apply timestamps */
882 ret = for_dentry_in_tree_depth(wim_root_dentry(w),
883 ops->apply_dentry_timestamps, &args);
888 progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END,
893 /* Unmount the NTFS volume */
894 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
895 if (ntfs_umount(args.vol, FALSE) != 0) {
896 ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%"TS"'",
899 ret = WIMLIB_ERR_NTFS_3G;
906 static const tchar *filename_forbidden_chars =
915 /* This function checks if it is okay to use a WIM image's name as a directory
918 image_name_ok_as_dir(const tchar *image_name)
920 return image_name && *image_name &&
921 !tstrpbrk(image_name, filename_forbidden_chars);
924 /* Extracts all images from the WIM to the directory @target, with the images
925 * placed in subdirectories named by their image names. */
927 extract_all_images(WIMStruct *w,
930 wimlib_progress_func_t progress_func)
932 size_t image_name_max_len = max(xml_get_max_image_name_len(w), 20);
933 size_t output_path_len = tstrlen(target);
934 tchar buf[output_path_len + 1 + image_name_max_len + 1];
937 const tchar *image_name;
939 ret = extract_directory(NULL, target, true);
943 tmemcpy(buf, target, output_path_len);
944 buf[output_path_len] = T('/');
945 for (image = 1; image <= w->hdr.image_count; image++) {
946 image_name = wimlib_get_image_name(w, image);
947 if (image_name_ok_as_dir(image_name)) {
948 tstrcpy(buf + output_path_len + 1, image_name);
950 /* Image name is empty, or contains forbidden
952 tsprintf(buf + output_path_len + 1, T("%d"), image);
954 ret = extract_single_image(w, image, buf, extract_flags,
962 /* Extracts a single image or all images from a WIM file to a directory or NTFS
965 wimlib_extract_image(WIMStruct *w,
969 WIMStruct **additional_swms,
970 unsigned num_additional_swms,
971 wimlib_progress_func_t progress_func)
973 struct wim_lookup_table *joined_tab, *w_tab_save;
977 return WIMLIB_ERR_INVALID_PARAM;
979 extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC;
981 if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
982 == (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
983 return WIMLIB_ERR_INVALID_PARAM;
986 if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
987 ERROR("Extracting UNIX data is not supported on Windows");
988 return WIMLIB_ERR_INVALID_PARAM;
990 if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
991 ERROR("Linked extraction modes are not supported on Windows");
992 return WIMLIB_ERR_INVALID_PARAM;
996 if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) {
998 if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))) {
999 ERROR("Cannot specify symlink or hardlink flags when applying\n"
1000 " directly to a NTFS volume");
1001 return WIMLIB_ERR_INVALID_PARAM;
1003 if (image == WIMLIB_ALL_IMAGES) {
1004 ERROR("Can only apply a single image when applying "
1005 "directly to a NTFS volume");
1006 return WIMLIB_ERR_INVALID_PARAM;
1008 if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
1009 ERROR("Cannot restore UNIX-specific data in the NTFS extraction mode");
1010 return WIMLIB_ERR_INVALID_PARAM;
1013 ERROR("wimlib was compiled without support for NTFS-3g, so");
1014 ERROR("we cannot apply a WIM image directly to a NTFS volume");
1015 return WIMLIB_ERR_UNSUPPORTED;
1019 ret = verify_swm_set(w, additional_swms, num_additional_swms);
1023 if (num_additional_swms) {
1024 ret = new_joined_lookup_table(w, additional_swms,
1025 num_additional_swms, &joined_tab);
1028 w_tab_save = w->lookup_table;
1029 w->lookup_table = joined_tab;
1032 if (image == WIMLIB_ALL_IMAGES) {
1033 extract_flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
1034 ret = extract_all_images(w, target, extract_flags,
1037 extract_flags &= ~WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
1038 ret = extract_single_image(w, image, target, extract_flags,
1042 if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
1043 WIMLIB_EXTRACT_FLAG_HARDLINK))
1045 for_lookup_table_entry(w->lookup_table,
1046 lte_free_extracted_file,
1050 if (num_additional_swms) {
1051 free_lookup_table(w->lookup_table);
1052 w->lookup_table = w_tab_save;