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/.
29 #include "wimlib/dentry.h"
30 #include "wimlib/error.h"
31 #include "wimlib/lookup_table.h"
32 #include "wimlib/metadata.h"
33 #include "wimlib/swm.h"
34 #include "wimlib/xml.h"
37 inode_allocate_needed_ltes(struct wim_inode *inode,
38 struct wim_lookup_table *src_lookup_table,
39 struct wim_lookup_table *dest_lookup_table,
40 struct list_head *lte_list_head)
42 struct wim_lookup_table_entry *src_lte, *dest_lte;
45 inode_unresolve_ltes(inode);
46 for (i = 0; i <= inode->i_num_ads; i++) {
47 src_lte = inode_stream_lte_unresolved(inode, i,
49 if (src_lte && src_lte->out_refcnt == 0) {
50 src_lte->out_refcnt = 1;
51 dest_lte = inode_stream_lte_unresolved(inode, i,
54 dest_lte = clone_lookup_table_entry(src_lte);
56 return WIMLIB_ERR_NOMEM;
57 list_add_tail(&dest_lte->export_stream_list,
66 inode_move_ltes_to_table(struct wim_inode *inode,
67 struct wim_lookup_table *src_lookup_table,
68 struct wim_lookup_table *dest_lookup_table,
69 struct list_head *lte_list_head)
71 struct wim_lookup_table_entry *src_lte, *dest_lte;
74 for (i = 0; i <= inode->i_num_ads; i++) {
75 src_lte = inode_stream_lte_unresolved(inode, i, src_lookup_table);
77 dest_lte = inode_stream_lte_unresolved(inode, i,
80 struct list_head *next;
82 wimlib_assert(!list_empty(lte_list_head));
83 next = lte_list_head->next;
85 dest_lte = container_of(next,
86 struct wim_lookup_table_entry,
88 dest_lte->part_number = 1;
90 wimlib_assert(hashes_equal(dest_lte->hash, src_lte->hash));
91 lookup_table_insert(dest_lookup_table, dest_lte);
93 dest_lte->refcnt += inode->i_nlink;
98 /* API function documented in wimlib.h */
100 wimlib_export_image(WIMStruct *src_wim,
103 const tchar *dest_name,
104 const tchar *dest_description,
106 WIMStruct **additional_swms,
107 unsigned num_additional_swms,
108 wimlib_progress_func_t progress_func)
111 struct wim_image_metadata *src_imd;
112 struct list_head lte_list_head;
113 struct wim_inode *inode;
115 ret = can_modify_wim(dest_wim);
119 if (src_image == WIMLIB_ALL_IMAGES) {
120 if (src_wim->hdr.image_count > 1) {
122 /* multi-image export. */
124 if ((export_flags & WIMLIB_EXPORT_FLAG_BOOT) &&
125 (src_wim->hdr.boot_idx == 0))
127 /* Specifying the boot flag on a multi-image
128 * source WIM makes the boot index default to
129 * the bootable image in the source WIM. It is
130 * an error if there is no such bootable image.
132 ERROR("Cannot specify `boot' flag when "
133 "exporting multiple images from a WIM "
134 "with no bootable images");
135 return WIMLIB_ERR_INVALID_PARAM;
137 if (dest_name || dest_description) {
138 ERROR("Image name or image description was "
139 "specified, but we are exporting "
141 return WIMLIB_ERR_INVALID_PARAM;
143 for (int i = 1; i <= src_wim->hdr.image_count; i++) {
144 int new_flags = export_flags;
146 if (i != src_wim->hdr.boot_idx)
147 new_flags &= ~WIMLIB_EXPORT_FLAG_BOOT;
149 ret = wimlib_export_image(src_wim, i, dest_wim,
159 } else if (src_wim->hdr.image_count == 1) {
167 dest_name = wimlib_get_image_name(src_wim, src_image);
168 DEBUG("Using name `%"TS"' for source image %d",
169 dest_name, src_image);
172 if (!dest_description) {
173 dest_description = wimlib_get_image_description(src_wim,
175 DEBUG("Using description `%"TS"' for source image %d",
176 dest_description, src_image);
179 DEBUG("Exporting image %d from `%"TS"'", src_image, src_wim->filename);
181 if (wimlib_image_name_in_use(dest_wim, dest_name)) {
182 ERROR("There is already an image named `%"TS"' in the "
183 "destination WIM", dest_name);
184 return WIMLIB_ERR_IMAGE_NAME_COLLISION;
187 ret = verify_swm_set(src_wim, additional_swms, num_additional_swms);
191 ret = wim_checksum_unhashed_streams(src_wim);
194 ret = wim_checksum_unhashed_streams(dest_wim);
198 if (num_additional_swms)
199 merge_lookup_tables(src_wim, additional_swms, num_additional_swms);
201 ret = select_wim_image(src_wim, src_image);
203 ERROR("Could not select image %d from the WIM `%"TS"' "
204 "to export it", src_image, src_wim->filename);
208 /* Pre-allocate the new lookup table entries that will be needed. This
209 * way, it's not possible to run out of memory part-way through
210 * modifying the lookup table of the destination WIM. */
211 for_lookup_table_entry(src_wim->lookup_table, lte_zero_out_refcnt, NULL);
212 src_imd = wim_get_current_image_metadata(src_wim);
213 INIT_LIST_HEAD(<e_list_head);
214 image_for_each_inode(inode, src_imd) {
215 ret = inode_allocate_needed_ltes(inode,
216 src_wim->lookup_table,
217 dest_wim->lookup_table,
223 ret = xml_export_image(src_wim->wim_info, src_image,
224 &dest_wim->wim_info, dest_name,
229 ret = append_image_metadata(dest_wim, src_imd);
231 goto out_xml_delete_image;
233 /* The `struct image_metadata' is now referenced by both the @src_wim
234 * and the @dest_wim. */
236 src_imd->modified = 1;
238 /* All memory allocations have been taken care of, so it's no longer
239 * possible for this function to fail. Go ahead and update the lookup
240 * table of the destination WIM and the boot index, if needed. */
241 image_for_each_inode(inode, src_imd) {
242 inode_move_ltes_to_table(inode,
243 src_wim->lookup_table,
244 dest_wim->lookup_table,
248 if (export_flags & WIMLIB_EXPORT_FLAG_BOOT)
249 dest_wim->hdr.boot_idx = dest_wim->hdr.image_count;
250 if (src_wim->hdr.flags & WIM_HDR_FLAG_RP_FIX)
252 /* Set the reparse point fixup flag on the destination WIM if
253 * the flag is set on the source WIM. */
254 dest_wim->hdr.flags |= WIM_HDR_FLAG_RP_FIX;
256 DEBUG("Successfully exported image.");
259 out_xml_delete_image:
260 xml_delete_image(&dest_wim->wim_info, dest_wim->hdr.image_count + 1);
263 struct wim_lookup_table_entry *lte, *tmp;
264 list_for_each_entry_safe(lte, tmp, <e_list_head, export_stream_list)
265 free_lookup_table_entry(lte);
268 if (num_additional_swms)
269 unmerge_lookup_table(src_wim);