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/.
24 #include "wimlib_internal.h"
26 #include "lookup_table.h"
30 inode_allocate_needed_ltes(struct wim_inode *inode,
31 struct wim_lookup_table *src_lookup_table,
32 struct wim_lookup_table *dest_lookup_table,
33 struct list_head *lte_list_head)
35 struct wim_lookup_table_entry *src_lte, *dest_lte;
38 inode_unresolve_ltes(inode);
39 for (i = 0; i <= inode->i_num_ads; i++) {
40 src_lte = inode_stream_lte_unresolved(inode, i,
42 if (src_lte && src_lte->out_refcnt == 0) {
43 src_lte->out_refcnt = 1;
44 dest_lte = inode_stream_lte_unresolved(inode, i,
47 dest_lte = clone_lookup_table_entry(src_lte);
49 return WIMLIB_ERR_NOMEM;
50 list_add_tail(&dest_lte->new_stream_list,
59 inode_move_ltes_to_table(struct wim_inode *inode,
60 struct wim_lookup_table *src_lookup_table,
61 struct wim_lookup_table *dest_lookup_table,
62 struct list_head *lte_list_head)
64 struct wim_lookup_table_entry *src_lte, *dest_lte;
67 for (i = 0; i <= inode->i_num_ads; i++) {
68 src_lte = inode_stream_lte_unresolved(inode, i, src_lookup_table);
70 dest_lte = inode_stream_lte_unresolved(inode, i,
73 struct list_head *next;
75 wimlib_assert(!list_empty(lte_list_head));
76 next = lte_list_head->next;
78 dest_lte = container_of(next,
79 struct wim_lookup_table_entry,
81 dest_lte->part_number = 1;
83 wimlib_assert(hashes_equal(dest_lte->hash, src_lte->hash));
84 lookup_table_insert(dest_lookup_table, dest_lte);
86 dest_lte->refcnt += inode->i_nlink;
92 * Exports an image, or all the images, from a WIM file, into another WIM file.
95 wimlib_export_image(WIMStruct *src_wim,
98 const tchar *dest_name,
99 const tchar *dest_description,
101 WIMStruct **additional_swms,
102 unsigned num_additional_swms,
103 wimlib_progress_func_t progress_func)
106 struct wim_lookup_table *joined_tab, *src_wim_tab_save;
107 struct wim_image_metadata *src_imd;
108 struct list_head lte_list_head;
109 struct wim_inode *inode;
111 if (dest_wim->hdr.total_parts != 1) {
112 ERROR("Exporting an image to a split WIM is "
114 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
117 if (src_image == WIMLIB_ALL_IMAGES) {
118 if (src_wim->hdr.image_count > 1) {
120 /* multi-image export. */
122 if ((export_flags & WIMLIB_EXPORT_FLAG_BOOT) &&
123 (src_wim->hdr.boot_idx == 0))
125 /* Specifying the boot flag on a multi-image
126 * source WIM makes the boot index default to
127 * the bootable image in the source WIM. It is
128 * an error if there is no such bootable image.
130 ERROR("Cannot specify `boot' flag when "
131 "exporting multiple images from a WIM "
132 "with no bootable images");
133 return WIMLIB_ERR_INVALID_PARAM;
135 if (dest_name || dest_description) {
136 ERROR("Image name or image description was "
137 "specified, but we are exporting "
139 return WIMLIB_ERR_INVALID_PARAM;
141 for (int i = 1; i <= src_wim->hdr.image_count; i++) {
142 int new_flags = export_flags;
144 if (i != src_wim->hdr.boot_idx)
145 new_flags &= ~WIMLIB_EXPORT_FLAG_BOOT;
147 ret = wimlib_export_image(src_wim, i, dest_wim,
157 } else if (src_wim->hdr.image_count == 1) {
165 dest_name = wimlib_get_image_name(src_wim, src_image);
166 DEBUG("Using name `%"TS"' for source image %d",
167 dest_name, src_image);
170 if (!dest_description) {
171 dest_description = wimlib_get_image_description(src_wim,
173 DEBUG("Using description `%"TS"' for source image %d",
174 dest_description, src_image);
177 DEBUG("Exporting image %d from `%"TS"'", src_image, src_wim->filename);
179 if (wimlib_image_name_in_use(dest_wim, dest_name)) {
180 ERROR("There is already an image named `%"TS"' in the "
181 "destination WIM", dest_name);
182 return WIMLIB_ERR_IMAGE_NAME_COLLISION;
185 ret = verify_swm_set(src_wim, additional_swms, num_additional_swms);
189 if (num_additional_swms) {
190 ret = new_joined_lookup_table(src_wim, additional_swms,
195 src_wim_tab_save = src_wim->lookup_table;
196 src_wim->lookup_table = joined_tab;
199 ret = select_wim_image(src_wim, src_image);
201 ERROR("Could not select image %d from the WIM `%"TS"' "
202 "to export it", src_image, src_wim->filename);
206 /* Pre-allocate the new lookup table entries that will be needed. This
207 * way, it's not possible to run out of memory part-way through
208 * modifying the lookup table of the destination WIM. */
209 for_lookup_table_entry(src_wim->lookup_table, lte_zero_out_refcnt, NULL);
210 src_imd = wim_get_current_image_metadata(src_wim);
211 INIT_LIST_HEAD(<e_list_head);
212 image_for_each_inode(inode, src_imd) {
213 ret = inode_allocate_needed_ltes(inode,
214 src_wim->lookup_table,
215 dest_wim->lookup_table,
221 ret = xml_export_image(src_wim->wim_info, src_image,
222 &dest_wim->wim_info, dest_name,
227 ret = append_image_metadata(dest_wim, src_imd);
229 goto out_xml_delete_image;
231 /* The `struct image_metadata' is now referenced by both the @src_wim
232 * and the @dest_wim. */
235 /* All memory allocations have been taken care of, so it's no longer
236 * possible for this function to fail. Go ahead and update the lookup
237 * table of the destination WIM and the boot index, if needed. */
238 image_for_each_inode(inode, src_imd) {
239 inode_move_ltes_to_table(inode,
240 src_wim->lookup_table,
241 dest_wim->lookup_table,
245 if (export_flags & WIMLIB_EXPORT_FLAG_BOOT)
246 dest_wim->hdr.boot_idx = dest_wim->hdr.image_count;
249 out_xml_delete_image:
250 xml_delete_image(&dest_wim->wim_info, dest_wim->hdr.image_count + 1);
253 struct wim_lookup_table_entry *lte, *tmp;
254 list_for_each_entry_safe(lte, tmp, <e_list_head, new_stream_list)
255 free_lookup_table_entry(lte);
258 if (num_additional_swms) {
259 free_lookup_table(src_wim->lookup_table);
260 src_wim->lookup_table = src_wim_tab_save;