2 * wim.c - Stuff that doesn't fit into any other file
6 * Copyright (C) 2012, 2013 Eric Biggers
8 * This file is part of wimlib, a library for working with WIM files.
10 * wimlib is free software; you can redistribute it and/or modify it under the
11 * terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 3 of the License, or (at your option)
15 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
16 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
17 * A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License
21 * along with wimlib; if not, see http://www.gnu.org/licenses/.
28 #include "wimlib/error.h"
29 #include "wimlib/dentry.h"
30 #include "wimlib/encoding.h"
31 #include "wimlib/file_io.h"
32 #include "wimlib/integrity.h"
33 #include "wimlib/lookup_table.h"
34 #include "wimlib/metadata.h"
36 # include "wimlib/ntfs_3g.h" /* for do_ntfs_umount() */
38 #include "wimlib/security.h"
39 #include "wimlib/wim.h"
40 #include "wimlib/xml.h"
43 # include "wimlib/win32.h" /* for realpath() replacement */
49 # include <langinfo.h>
57 image_print_metadata(WIMStruct *wim)
59 DEBUG("Printing metadata for image %d", wim->current_image);
60 print_wim_security_data(wim_security_data(wim));
61 return for_dentry_in_tree(wim_root_dentry(wim), print_dentry,
69 WIMStruct *wim = CALLOC(1, sizeof(WIMStruct));
73 INIT_LIST_HEAD(&wim->subwims);
78 /* Determine if the chunk size is valid for the specified compression type. */
80 wim_chunk_size_valid(u32 chunk_size, int ctype)
84 /* Chunk size is meaningless for uncompressed WIMs --- any value is
86 if (ctype == WIMLIB_COMPRESSION_TYPE_NONE)
89 /* Chunk size must be power of 2. */
92 order = bsr32(chunk_size);
93 if (chunk_size != 1U << order)
112 case WIMLIB_COMPRESSION_TYPE_LZX:
113 /* For LZX compression, the chunk size corresponds to the LZX
114 * window size, which according the LZX specification can be any
115 * power of 2 between 2^15 and 2^21, inclusively. All these are
116 * supported by wimlib; however, unfortunately only 2^15 is
117 * supported by WIMGAPI[1] so this value is used by default.
119 * [1] WIMGAPI (Windows 7) attempts to decompress LZX chunk
120 * sizes > 2^15 but seems to have bug(s) that cause it to fail
121 * or crash. (I tried several tweaks to the LZX data but none
122 * resulted in successful decompression.) WIMGAPI (Windows 8)
123 * appears to refuse to open WIMs with chunk size > 2^15
125 return order >= 15 && order <= 21;
127 case WIMLIB_COMPRESSION_TYPE_XPRESS:
128 /* WIMGAPI (Windows 7) didn't seem to support XPRESS chunk size
129 * below 32768 bytes, but larger power-of-two sizes appear to be
130 * supported. 67108864 was the largest size that worked.
131 * (Note, however, that the offsets of XPRESS matches are still
132 * limited to 65535 bytes even when a much larger chunk size is
135 * WIMGAPI (Windows 8) seemed to have removed the support for
136 * larger XPRESS chunk sizes and will refuse to open such WIMs.
138 * 2^15 = 32768 is the default value used for compatibility, but
139 * wimlib can actually use up to 2^26. */
140 return order >= 15 && order <= 26;
142 case WIMLIB_COMPRESSION_TYPE_LZMS:
149 /* Return the default chunk size to use for the specified compression type.
151 * See notes above in wim_chunk_size_valid(). */
153 wim_default_chunk_size(int ctype)
159 * Calls a function on images in the WIM. If @image is WIMLIB_ALL_IMAGES, @visitor
160 * is called on the WIM once for each image, with each image selected as the
161 * current image in turn. If @image is a certain image, @visitor is called on
162 * the WIM only once, with that image selected.
165 for_image(WIMStruct *wim, int image, int (*visitor)(WIMStruct *))
172 if (image == WIMLIB_ALL_IMAGES) {
174 end = wim->hdr.image_count;
175 } else if (image >= 1 && image <= wim->hdr.image_count) {
179 return WIMLIB_ERR_INVALID_IMAGE;
181 for (i = start; i <= end; i++) {
182 ret = select_wim_image(wim, i);
192 /* API function documented in wimlib.h */
194 wimlib_create_new_wim(int ctype, WIMStruct **wim_ret)
197 struct wim_lookup_table *table;
200 wimlib_global_init(WIMLIB_INIT_FLAG_ASSUME_UTF8);
202 DEBUG("Creating new WIM with %"TS" compression.",
203 wimlib_get_compression_type_string(ctype));
205 /* Allocate the WIMStruct. */
206 wim = new_wim_struct();
208 return WIMLIB_ERR_NOMEM;
210 ret = init_wim_header(&wim->hdr, ctype, wim_default_chunk_size(ctype));
214 table = new_lookup_table(9001);
216 ret = WIMLIB_ERR_NOMEM;
219 wim->lookup_table = table;
221 wim->compression_type = ctype;
222 wim->out_compression_type = ctype;
223 wim->chunk_size = wim->hdr.chunk_size;
224 wim->out_chunk_size = wim->hdr.chunk_size;
233 select_wim_image(WIMStruct *wim, int image)
235 struct wim_image_metadata *imd;
238 DEBUG("Selecting image %d", image);
240 if (image == WIMLIB_NO_IMAGE) {
241 ERROR("Invalid image: %d", WIMLIB_NO_IMAGE);
242 return WIMLIB_ERR_INVALID_IMAGE;
245 if (image == wim->current_image)
248 if (image < 1 || image > wim->hdr.image_count) {
249 ERROR("Cannot select image %d: There are only %u images",
250 image, wim->hdr.image_count);
251 return WIMLIB_ERR_INVALID_IMAGE;
254 if (!wim_has_metadata(wim)) {
255 ERROR("\"%"TS"\" does not contain metadata resources!", wim->filename);
256 if (wim->hdr.part_number != 1)
257 ERROR("Specify the first part of the split WIM instead.");
258 return WIMLIB_ERR_METADATA_NOT_FOUND;
261 /* If a valid image is currently selected, it can be freed if it is not
263 if (wim->current_image != WIMLIB_NO_IMAGE) {
264 imd = wim_get_current_image_metadata(wim);
265 if (!imd->modified) {
266 wimlib_assert(list_empty(&imd->unhashed_streams));
267 DEBUG("Freeing image %u", wim->current_image);
268 destroy_image_metadata(imd, NULL, false);
271 wim->current_image = image;
272 imd = wim_get_current_image_metadata(wim);
273 if (imd->root_dentry || imd->modified) {
277 DEBUG("Reading metadata resource specified by the following "
278 "lookup table entry:");
279 print_lookup_table_entry(imd->metadata_lte, stderr);
281 ret = read_metadata_resource(wim, imd);
283 wim->current_image = WIMLIB_NO_IMAGE;
289 /* API function documented in wimlib.h */
290 WIMLIBAPI const tchar *
291 wimlib_get_compression_type_string(int ctype)
294 case WIMLIB_COMPRESSION_TYPE_NONE:
296 case WIMLIB_COMPRESSION_TYPE_LZX:
298 case WIMLIB_COMPRESSION_TYPE_XPRESS:
300 case WIMLIB_COMPRESSION_TYPE_LZMS:
307 /* API function documented in wimlib.h */
309 wimlib_resolve_image(WIMStruct *wim, const tchar *image_name_or_num)
315 if (!image_name_or_num || !*image_name_or_num)
316 return WIMLIB_NO_IMAGE;
318 if (!tstrcasecmp(image_name_or_num, T("all"))
319 || !tstrcasecmp(image_name_or_num, T("*")))
320 return WIMLIB_ALL_IMAGES;
321 image = tstrtol(image_name_or_num, &p, 10);
322 if (p != image_name_or_num && *p == T('\0') && image > 0) {
323 if (image > wim->hdr.image_count)
324 return WIMLIB_NO_IMAGE;
327 for (i = 1; i <= wim->hdr.image_count; i++) {
328 if (!tstrcmp(image_name_or_num,
329 wimlib_get_image_name(wim, i)))
332 return WIMLIB_NO_IMAGE;
336 /* API function documented in wimlib.h */
338 wimlib_print_available_images(const WIMStruct *wim, int image)
344 if (image == WIMLIB_ALL_IMAGES) {
345 n = tprintf(T("Available Images:\n"));
347 last = wim->hdr.image_count;
348 } else if (image >= 1 && image <= wim->hdr.image_count) {
349 n = tprintf(T("Information for Image %d\n"), image);
353 tprintf(T("wimlib_print_available_images(): Invalid image %d"),
357 for (i = 0; i < n - 1; i++)
360 for (i = first; i <= last; i++)
361 print_image_info(wim->wim_info, i);
365 /* API function documented in wimlib.h */
367 wimlib_print_metadata(WIMStruct *wim, int image)
369 return for_image(wim, image, image_print_metadata);
372 /* API function documented in wimlib.h */
374 wimlib_get_wim_info(WIMStruct *wim, struct wimlib_wim_info *info)
376 memset(info, 0, sizeof(struct wimlib_wim_info));
377 memcpy(info->guid, wim->hdr.guid, WIMLIB_GUID_LEN);
378 info->image_count = wim->hdr.image_count;
379 info->boot_index = wim->hdr.boot_idx;
380 info->wim_version = wim->hdr.wim_version;
381 info->chunk_size = wim->hdr.chunk_size;
382 info->part_number = wim->hdr.part_number;
383 info->total_parts = wim->hdr.total_parts;
384 info->compression_type = wim->compression_type;
385 info->total_bytes = wim_info_get_total_bytes(wim->wim_info);
386 info->has_integrity_table = wim_has_integrity_table(wim);
387 info->opened_from_file = (wim->filename != NULL);
388 info->is_readonly = (wim->hdr.flags & WIM_HDR_FLAG_READONLY) ||
389 (wim->hdr.total_parts != 1) ||
390 (wim->filename && taccess(wim->filename, W_OK));
391 info->has_rpfix = (wim->hdr.flags & WIM_HDR_FLAG_RP_FIX) != 0;
392 info->is_marked_readonly = (wim->hdr.flags & WIM_HDR_FLAG_READONLY) != 0;
393 info->write_in_progress = (wim->hdr.flags & WIM_HDR_FLAG_WRITE_IN_PROGRESS) != 0;
394 info->metadata_only = (wim->hdr.flags & WIM_HDR_FLAG_METADATA_ONLY) != 0;
395 info->resource_only = (wim->hdr.flags & WIM_HDR_FLAG_RESOURCE_ONLY) != 0;
396 info->spanned = (wim->hdr.flags & WIM_HDR_FLAG_SPANNED) != 0;
397 info->pipable = wim_is_pipable(wim);
401 /* API function documented in wimlib.h */
403 wimlib_set_wim_info(WIMStruct *wim, const struct wimlib_wim_info *info, int which)
407 if (which & WIMLIB_CHANGE_READONLY_FLAG) {
408 if (info->is_marked_readonly)
409 wim->hdr.flags |= WIM_HDR_FLAG_READONLY;
411 wim->hdr.flags &= ~WIM_HDR_FLAG_READONLY;
414 if ((which & ~WIMLIB_CHANGE_READONLY_FLAG) == 0)
417 ret = can_modify_wim(wim);
421 if (which & WIMLIB_CHANGE_GUID) {
422 memcpy(wim->hdr.guid, info->guid, WIM_GID_LEN);
423 wim->guid_set_explicitly = 1;
426 if (which & WIMLIB_CHANGE_BOOT_INDEX) {
427 if (info->boot_index > wim->hdr.image_count) {
428 ERROR("%u is not 0 or a valid image in the WIM to mark as bootable",
430 return WIMLIB_ERR_INVALID_IMAGE;
432 wim->hdr.boot_idx = info->boot_index;
435 if (which & WIMLIB_CHANGE_RPFIX_FLAG) {
437 wim->hdr.flags |= WIM_HDR_FLAG_RP_FIX;
439 wim->hdr.flags &= ~WIM_HDR_FLAG_RP_FIX;
444 /* API function documented in wimlib.h */
446 wimlib_set_output_compression_type(WIMStruct *wim, int ctype)
449 case WIMLIB_COMPRESSION_TYPE_INVALID:
451 case WIMLIB_COMPRESSION_TYPE_NONE:
452 case WIMLIB_COMPRESSION_TYPE_LZX:
453 case WIMLIB_COMPRESSION_TYPE_XPRESS:
454 case WIMLIB_COMPRESSION_TYPE_LZMS:
455 wim->out_compression_type = ctype;
457 /* Reset the chunk size if it's no longer valid. */
458 if (!wim_chunk_size_valid(wim->out_chunk_size,
459 wim->out_compression_type))
460 wim->out_chunk_size = wim_default_chunk_size(wim->out_compression_type);
463 return WIMLIB_ERR_INVALID_PARAM;
466 /* API function documented in wimlib.h */
468 wimlib_set_output_chunk_size(WIMStruct *wim, uint32_t chunk_size)
470 if (!wim_chunk_size_valid(chunk_size, wim->out_compression_type)) {
471 ERROR("Invalid chunk size (%"PRIu32" bytes) "
472 "for compression type %"TS"!",
474 wimlib_get_compression_type_string(wim->out_compression_type));
475 switch (wim->out_compression_type) {
476 case WIMLIB_COMPRESSION_TYPE_XPRESS:
477 ERROR("Valid chunk sizes for XPRESS are "
478 "32768, 65536, 131072, ..., 67108864.");
480 case WIMLIB_COMPRESSION_TYPE_LZX:
481 ERROR("Valid chunk sizes for LZX are "
482 "32768, 65536, 131072, ..., 2097152.");
484 case WIMLIB_COMPRESSION_TYPE_LZMS:
485 ERROR("Valid chunk sizes for LZMS are 131072.");
488 return WIMLIB_ERR_INVALID_CHUNK_SIZE;
490 if (chunk_size != 32768) {
491 WARNING ("Changing the compression chunk size to any value other than\n"
492 " the default of 32768 bytes eliminates compatibility with\n"
493 " Microsoft's software!");
495 wim->out_chunk_size = chunk_size;
500 do_open_wim(const tchar *filename, struct filedes *fd_ret)
504 raw_fd = topen(filename, O_RDONLY | O_BINARY);
506 ERROR_WITH_ERRNO("Can't open \"%"TS"\" read-only", filename);
507 return WIMLIB_ERR_OPEN;
509 filedes_init(fd_ret, raw_fd);
514 reopen_wim(WIMStruct *wim)
516 wimlib_assert(!filedes_valid(&wim->in_fd));
517 return do_open_wim(wim->filename, &wim->in_fd);
521 close_wim(WIMStruct *wim)
523 if (filedes_valid(&wim->in_fd)) {
524 filedes_close(&wim->in_fd);
525 filedes_invalidate(&wim->in_fd);
531 * Begins the reading of a WIM file; opens the file and reads its header and
532 * lookup table, and optionally checks the integrity.
535 begin_read(WIMStruct *wim, const void *wim_filename_or_fd,
536 int open_flags, wimlib_progress_func_t progress_func)
540 const tchar *wimfile;
542 if (open_flags & WIMLIB_OPEN_FLAG_FROM_PIPE) {
544 filedes_init(&wim->in_fd, *(const int*)wim_filename_or_fd);
545 wim->in_fd.is_pipe = 1;
547 wimfile = wim_filename_or_fd;
548 ret = do_open_wim(wimfile, &wim->in_fd);
552 /* The absolute path to the WIM is requested so that
553 * wimlib_overwrite() still works even if the process changes
554 * its working directory. This actually happens if a WIM is
555 * mounted read-write, since the FUSE thread changes directory
556 * to "/", and it needs to be able to find the WIM file again.
558 * This will break if the full path to the WIM changes in the
559 * intervening time...
561 * Warning: in Windows native builds, realpath() calls the
562 * replacement function in win32_replacements.c.
564 wim->filename = realpath(wimfile, NULL);
565 if (wim->filename == NULL) {
566 ERROR_WITH_ERRNO("Failed to resolve WIM filename");
568 return WIMLIB_ERR_NOMEM;
570 return WIMLIB_ERR_OPEN;
574 ret = read_wim_header(wim, &wim->hdr);
578 if (wim->hdr.flags & WIM_HDR_FLAG_WRITE_IN_PROGRESS) {
579 WARNING("The WIM_HDR_FLAG_WRITE_IN_PROGRESS flag is set in the header of\n"
580 " \"%"TS"\". It may be being changed by another process,\n"
581 " or a process may have crashed while writing the WIM.",
585 if (open_flags & WIMLIB_OPEN_FLAG_WRITE_ACCESS) {
586 ret = can_modify_wim(wim);
591 if ((open_flags & WIMLIB_OPEN_FLAG_ERROR_IF_SPLIT) &&
592 (wim->hdr.total_parts != 1))
593 return WIMLIB_ERR_IS_SPLIT_WIM;
595 DEBUG("According to header, WIM contains %u images", wim->hdr.image_count);
597 /* If the boot index is invalid, print a warning and set it to 0 */
598 if (wim->hdr.boot_idx > wim->hdr.image_count) {
599 WARNING("In `%"TS"', image %u is marked as bootable, "
600 "but there are only %u images in the WIM",
601 wimfile, wim->hdr.boot_idx, wim->hdr.image_count);
602 wim->hdr.boot_idx = 0;
605 /* Check and cache the compression type */
606 if (wim->hdr.flags & WIM_HDR_FLAG_COMPRESSION) {
607 if (wim->hdr.flags & WIM_HDR_FLAG_COMPRESS_LZX) {
608 wim->compression_type = WIMLIB_COMPRESSION_TYPE_LZX;
609 } else if (wim->hdr.flags & WIM_HDR_FLAG_COMPRESS_XPRESS) {
610 wim->compression_type = WIMLIB_COMPRESSION_TYPE_XPRESS;
611 } else if (wim->hdr.flags & WIM_HDR_FLAG_COMPRESS_LZMS) {
612 wim->compression_type = WIMLIB_COMPRESSION_TYPE_LZMS;
614 ERROR("The compression flag is set on \"%"TS"\", but "
615 "a flag for a recognized format is not",
617 return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
620 wim->compression_type = WIMLIB_COMPRESSION_TYPE_NONE;
622 wim->out_compression_type = wim->compression_type;
624 /* Check and cache the chunk size. */
625 wim->chunk_size = wim->out_chunk_size = wim->hdr.chunk_size;
626 if (!wim_chunk_size_valid(wim->chunk_size, wim->compression_type)) {
627 ERROR("Invalid chunk size (%"PRIu32" bytes) "
628 "for compression type %"TS"!",
630 wimlib_get_compression_type_string(wim->compression_type));
631 return WIMLIB_ERR_INVALID_CHUNK_SIZE;
634 if (open_flags & WIMLIB_OPEN_FLAG_CHECK_INTEGRITY) {
635 ret = check_wim_integrity(wim, progress_func);
636 if (ret == WIM_INTEGRITY_NONEXISTENT) {
637 WARNING("No integrity information for `%"TS"'; skipping "
638 "integrity check.", wimfile);
639 } else if (ret == WIM_INTEGRITY_NOT_OK) {
640 ERROR("WIM is not intact! (Failed integrity check)");
641 return WIMLIB_ERR_INTEGRITY;
642 } else if (ret != WIM_INTEGRITY_OK) {
647 if (wim->hdr.image_count != 0 && wim->hdr.part_number == 1) {
648 wim->image_metadata = new_image_metadata_array(wim->hdr.image_count);
649 if (wim->image_metadata == NULL)
650 return WIMLIB_ERR_NOMEM;
653 if (open_flags & WIMLIB_OPEN_FLAG_FROM_PIPE) {
654 wim->lookup_table = new_lookup_table(9001);
655 if (wim->lookup_table == NULL)
656 return WIMLIB_ERR_NOMEM;
658 ret = read_wim_lookup_table(wim);
662 ret = read_wim_xml_data(wim);
666 xml_num_images = wim_info_get_num_images(wim->wim_info);
667 if (xml_num_images != wim->hdr.image_count) {
668 ERROR("In the file `%"TS"', there are %u <IMAGE> elements "
669 "in the XML data,", wimfile, xml_num_images);
670 ERROR("but %u images in the WIM! There must be exactly one "
671 "<IMAGE> element per image.", wim->hdr.image_count);
672 return WIMLIB_ERR_IMAGE_COUNT;
674 DEBUG("Done beginning read of WIM file `%"TS"'.", wimfile);
680 open_wim_as_WIMStruct(const void *wim_filename_or_fd, int open_flags,
681 WIMStruct **wim_ret, wimlib_progress_func_t progress_func)
686 if (open_flags & WIMLIB_OPEN_FLAG_FROM_PIPE)
687 DEBUG("Opening pipable WIM from file descriptor %d.", *(const int*)wim_filename_or_fd);
689 DEBUG("Opening WIM file \"%"TS"\"", (const tchar*)wim_filename_or_fd);
691 wimlib_global_init(WIMLIB_INIT_FLAG_ASSUME_UTF8);
694 return WIMLIB_ERR_INVALID_PARAM;
696 wim = new_wim_struct();
698 return WIMLIB_ERR_NOMEM;
700 ret = begin_read(wim, wim_filename_or_fd, open_flags, progress_func);
706 DEBUG("Successfully opened WIM and created WIMStruct.");
711 /* API function documented in wimlib.h */
713 wimlib_open_wim(const tchar *wimfile, int open_flags,
714 WIMStruct **wim_ret, wimlib_progress_func_t progress_func)
716 open_flags &= WIMLIB_OPEN_MASK_PUBLIC;
717 return open_wim_as_WIMStruct(wimfile, open_flags, wim_ret,
722 destroy_image_metadata(struct wim_image_metadata *imd,
723 struct wim_lookup_table *table,
724 bool free_metadata_lte)
726 free_dentry_tree(imd->root_dentry, table);
727 imd->root_dentry = NULL;
728 free_wim_security_data(imd->security_data);
729 imd->security_data = NULL;
731 if (free_metadata_lte) {
732 free_lookup_table_entry(imd->metadata_lte);
733 imd->metadata_lte = NULL;
736 struct wim_lookup_table_entry *lte, *tmp;
737 list_for_each_entry_safe(lte, tmp, &imd->unhashed_streams, unhashed_list)
738 free_lookup_table_entry(lte);
740 INIT_LIST_HEAD(&imd->unhashed_streams);
741 INIT_LIST_HEAD(&imd->inode_list);
744 do_ntfs_umount(imd->ntfs_vol);
745 imd->ntfs_vol = NULL;
751 put_image_metadata(struct wim_image_metadata *imd,
752 struct wim_lookup_table *table)
754 if (imd && --imd->refcnt == 0) {
755 destroy_image_metadata(imd, table, true);
760 /* Appends the specified image metadata structure to the array of image metadata
761 * for a WIM, and increments the image count. */
763 append_image_metadata(WIMStruct *wim, struct wim_image_metadata *imd)
765 struct wim_image_metadata **imd_array;
767 DEBUG("Reallocating image metadata array for image_count = %u",
768 wim->hdr.image_count + 1);
769 imd_array = REALLOC(wim->image_metadata,
770 sizeof(wim->image_metadata[0]) * (wim->hdr.image_count + 1));
772 if (imd_array == NULL)
773 return WIMLIB_ERR_NOMEM;
774 wim->image_metadata = imd_array;
775 imd_array[wim->hdr.image_count++] = imd;
780 struct wim_image_metadata *
781 new_image_metadata(void)
783 struct wim_image_metadata *imd;
785 imd = CALLOC(1, sizeof(*imd));
788 INIT_LIST_HEAD(&imd->inode_list);
789 INIT_LIST_HEAD(&imd->unhashed_streams);
790 DEBUG("Created new image metadata (refcnt=1)");
792 ERROR_WITH_ERRNO("Failed to allocate new image metadata structure");
797 struct wim_image_metadata **
798 new_image_metadata_array(unsigned num_images)
800 struct wim_image_metadata **imd_array;
802 DEBUG("Creating new image metadata array for %u images",
805 imd_array = CALLOC(num_images, sizeof(imd_array[0]));
807 if (imd_array == NULL) {
808 ERROR("Failed to allocate memory for %u image metadata structures",
812 for (unsigned i = 0; i < num_images; i++) {
813 imd_array[i] = new_image_metadata();
814 if (imd_array[i] == NULL) {
815 for (unsigned j = 0; j < i; j++)
816 put_image_metadata(imd_array[j], NULL);
824 /* Checksum all streams that are unhashed (other than the metadata streams),
825 * merging them into the lookup table as needed. This is a no-op unless the
826 * library has previously used to add or mount an image using the same
829 wim_checksum_unhashed_streams(WIMStruct *wim)
833 if (!wim_has_metadata(wim))
835 for (int i = 0; i < wim->hdr.image_count; i++) {
836 struct wim_lookup_table_entry *lte, *tmp;
837 struct wim_image_metadata *imd = wim->image_metadata[i];
838 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
839 ret = hash_unhashed_stream(lte, wim->lookup_table, NULL);
848 * can_modify_wim - Check if a given WIM is writeable. This is only the case if
849 * it meets the following three conditions:
851 * 1. Write access is allowed to the underlying file (if any) at the filesystem level.
852 * 2. The WIM is not part of a spanned set.
853 * 3. The WIM_HDR_FLAG_READONLY flag is not set in the WIM header.
855 * Return value is 0 if writable; WIMLIB_ERR_WIM_IS_READONLY otherwise.
858 can_modify_wim(WIMStruct *wim)
861 if (taccess(wim->filename, W_OK)) {
862 ERROR_WITH_ERRNO("Can't modify \"%"TS"\"", wim->filename);
863 return WIMLIB_ERR_WIM_IS_READONLY;
866 if (wim->hdr.total_parts != 1) {
867 ERROR("Cannot modify \"%"TS"\": is part of a split WIM",
869 return WIMLIB_ERR_WIM_IS_READONLY;
871 if (wim->hdr.flags & WIM_HDR_FLAG_READONLY) {
872 ERROR("Cannot modify \"%"TS"\": is marked read-only",
874 return WIMLIB_ERR_WIM_IS_READONLY;
880 * can_delete_from_wim - Check if files or images can be deleted from a given
883 * This theoretically should be exactly the same as can_modify_wim(), but
884 * unfortunately, due to bugs in Microsoft's software that generate incorrect
885 * reference counts for some WIM resources, we need to run expensive
886 * verifications to make sure the reference counts are correct on all WIM
887 * resources. Otherwise we might delete a WIM resource whose reference count
888 * has fallen to 0, but is actually still referenced somewhere.
891 can_delete_from_wim(WIMStruct *wim)
895 ret = can_modify_wim(wim);
898 if (!wim->refcnts_ok) {
899 ret = wim_recalculate_refcnts(wim);
906 /* API function documented in wimlib.h */
908 wimlib_free(WIMStruct *wim)
913 DEBUG("Freeing WIMStruct (filename=\"%"TS"\", image_count=%u)",
914 wim->filename, wim->hdr.image_count);
916 while (!list_empty(&wim->subwims)) {
919 subwim = list_entry(wim->subwims.next, WIMStruct, subwim_node);
920 list_del(&subwim->subwim_node);
921 DEBUG("Freeing subwim.");
925 if (filedes_valid(&wim->in_fd))
926 filedes_close(&wim->in_fd);
927 if (filedes_valid(&wim->out_fd))
928 filedes_close(&wim->out_fd);
930 wimlib_lzx_free_context(wim->lzx_context);
932 free_lookup_table(wim->lookup_table);
935 free_wim_info(wim->wim_info);
936 if (wim->image_metadata) {
937 for (unsigned i = 0; i < wim->hdr.image_count; i++)
938 put_image_metadata(wim->image_metadata[i], NULL);
939 FREE(wim->image_metadata);
945 test_locale_ctype_utf8(void)
950 char *ctype = nl_langinfo(CODESET);
952 return (!strstr(ctype, "UTF-8") ||
953 !strstr(ctype, "UTF8") ||
954 !strstr(ctype, "utf8") ||
955 !strstr(ctype, "utf-8"));
959 /* API function documented in wimlib.h */
961 wimlib_global_init(int init_flags)
963 static bool already_inited = false;
968 libxml_global_init();
969 if (!(init_flags & WIMLIB_INIT_FLAG_ASSUME_UTF8)) {
970 wimlib_mbs_is_utf8 = test_locale_ctype_utf8();
972 if (!wimlib_mbs_is_utf8)
973 libntfs3g_global_init();
977 ret = win32_global_init(init_flags);
983 already_inited = true;
987 /* API function documented in wimlib.h */
989 wimlib_global_cleanup(void)
991 libxml_global_cleanup();
992 iconv_global_cleanup();
994 win32_global_cleanup();