+/*
+ * join.c
+ *
+ * Join split WIMs (sometimes named as .swm files) together into one WIM.
+ *
+ * Copyright (C) 2010 Carl Thijssen
+ * Copyright (C) 2012 Eric Biggers
+ *
+ * wimlib - Library for working with WIM files
+ *
+ * This library is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the Free
+ * Software Foundation; either version 2.1 of the License, or (at your option) any
+ * later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this library; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "wimlib.h"
+#include "lookup_table.h"
+#include "xml.h"
+
+static int join_resource(struct lookup_table_entry *lte, void *split_wim)
+{
+ FILE *split_wim_fp = ((WIMStruct*)split_wim)->fp;
+ FILE *joined_wim_fp = ((WIMStruct*)split_wim)->out_fp;
+ int ret;
+
+ u64 size = lte->resource_entry.size;
+ u64 offset = lte->resource_entry.offset;
+ off_t new_offset = ftello(joined_wim_fp);
+
+ if (new_offset == -1)
+ return WIMLIB_ERR_WRITE;
+
+ ret = copy_between_files(split_wim_fp, offset, joined_wim_fp, size);
+ if (ret != 0)
+ return ret;
+
+ memcpy(<e->output_resource_entry, <e->resource_entry,
+ sizeof(struct resource_entry));
+
+ lte->output_resource_entry.offset = new_offset;
+ lte->out_refcnt = lte->refcnt;
+ lte->part_number = 1;
+ return 0;
+}
+
+static int join_wims(WIMStruct **swms, uint num_swms, WIMStruct *joined_wim,
+ int write_flags)
+{
+ uint i;
+ int ret;
+ FILE *out_fp = joined_wim->out_fp;
+ u64 total_bytes = wim_info_get_total_bytes(swms[0]->wim_info);
+
+ /* The following loop writes both file resources and metadata resources
+ * because it loops over the lookup table entries rather than the dentry
+ * tree for the images */
+ for (i = 0; i < num_swms; i++) {
+ if (write_flags & WIMLIB_WRITE_FLAG_SHOW_PROGRESS) {
+ off_t cur_offset = ftello(out_fp);
+ printf("Writing resources from part %u of %u "
+ "(%"PRIu64" of %"PRIu64" bytes, %.2f%% done)\n",
+ i + 1, num_swms,
+ cur_offset, total_bytes,
+ (double)cur_offset / total_bytes * 100.0);
+ }
+ swms[i]->out_fp = out_fp;
+ ret = for_lookup_table_entry(swms[i]->lookup_table,
+ join_resource, swms[i]);
+ if (ret != 0)
+ return ret;
+ }
+
+ off_t lookup_table_offset = ftello(out_fp);
+
+ if (write_flags & WIMLIB_WRITE_FLAG_SHOW_PROGRESS)
+ printf("Writing lookup tables, XML data, and header\n");
+ /* Now write the lookup table for the joined wim. Since the lookup
+ * table has no header, we can just concatenate the lookup tables of all
+ * the SWM parts. */
+ for (i = 0; i < num_swms; i++) {
+ ret = write_lookup_table(swms[i]->lookup_table, out_fp);
+ if (ret != 0)
+ return ret;
+ }
+ off_t xml_data_offset = ftello(out_fp);
+
+ if (lookup_table_offset == -1 || xml_data_offset == -1) {
+ ERROR("Failed to get file offset: %m\n");
+ return WIMLIB_ERR_WRITE;
+ }
+ swms[0]->hdr.lookup_table_res_entry.offset = lookup_table_offset;
+ swms[0]->hdr.lookup_table_res_entry.size =
+ xml_data_offset - lookup_table_offset;
+
+ swms[0]->hdr.flags &= ~WIM_HDR_FLAG_SPANNED;
+
+ /* finish_write is called on the first swm, not the joined_wim, because
+ * the first swm is the one that has the image metadata and XML data
+ * attached to it. */
+ return finish_write(swms[0], WIM_ALL_IMAGES, write_flags, 0);
+}
+
+
+WIMLIBAPI int wimlib_join(const char **swm_names, int num_swms,
+ const char *output_path, int flags)
+{
+ int i;
+ int ret;
+ int part_idx;
+ int write_flags = 0;
+ WIMStruct *w;
+ WIMStruct *joined_wim = NULL;
+ WIMStruct *swms[num_swms];
+
+ /* keep track of ctype and guid just to make sure they are the same for
+ * all the WIMs. */
+ int ctype;
+ u8 *guid;
+
+ ZERO_ARRAY(swms);
+ for (i = 0; i < num_swms; i++) {
+ ret = wimlib_open_wim(swm_names[i],
+ flags | WIMLIB_OPEN_FLAG_SPLIT_OK, &w);
+ if (ret != 0)
+ goto err;
+
+ if (i == 0) {
+ ctype = wimlib_get_compression_type(w);
+ guid = w->hdr.guid;
+ } else {
+ if (wimlib_get_compression_type(w) != ctype) {
+ ERROR("The split WIMs do not all have the same "
+ "compression type!\n");
+ ret = WIMLIB_ERR_SPLIT_INVALID;
+ goto err;
+ }
+ if (memcmp(guid, w->hdr.guid, WIM_GID_LEN) != 0) {
+ ERROR("The split WIMs do not all have the "
+ "same GUID!\n");
+ ret = WIMLIB_ERR_SPLIT_INVALID;
+ goto err;
+ }
+ }
+ if (w->hdr.total_parts != num_swms) {
+ ERROR("`%s' (part %d) says there are %d total parts,\n"
+ "but %d parts were specified!\n",
+ swm_names[i], w->hdr.part_number,
+ w->hdr.total_parts, num_swms);
+ ret = WIMLIB_ERR_SPLIT_INVALID;
+ goto err;
+ }
+ if (w->hdr.part_number == 0 || w->hdr.part_number > num_swms) {
+ ERROR("`%s' says it is part %d, but expected a number\n"
+ "between 1 and %d!\n",
+ swm_names[i], w->hdr.part_number, num_swms);
+ ret = WIMLIB_ERR_SPLIT_INVALID;
+ goto err;
+ }
+ part_idx = w->hdr.part_number - 1;
+ if (swms[part_idx] != NULL) {
+ ERROR("`%s' and `%s' both say they are part %d of %d!\n",
+ swm_names[i], swms[part_idx]->filename,
+ w->hdr.part_number, num_swms);
+ ret = WIMLIB_ERR_SPLIT_INVALID;
+ goto err;
+ }
+ swms[part_idx] = w;
+
+ }
+ joined_wim = new_wim_struct();
+ if (!joined_wim) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto err;
+ }
+
+ if (flags & WIMLIB_OPEN_FLAG_CHECK_INTEGRITY)
+ write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
+ if (flags & WIMLIB_OPEN_FLAG_SHOW_PROGRESS)
+ write_flags |= WIMLIB_WRITE_FLAG_SHOW_PROGRESS;
+
+ ret = begin_write(joined_wim, output_path, write_flags);
+ if (ret != 0)
+ goto err;
+ ret = join_wims(swms, num_swms, joined_wim, write_flags);
+err:
+ for (i = 0; i < num_swms; i++) {
+ /* out_fp is the same in all the swms and joined_wim; only close
+ * it one time, when freeing joined_wim. */
+ swms[i]->out_fp = NULL;
+ wimlib_free(swms[i]);
+ }
+ wimlib_free(joined_wim);
+ return ret;
+}
git://wimlib.net / wimlib / commitdiff