- /* Write the resources (streams and metadata resources) from each SWM
- * part */
- swms[0]->write_metadata = true;
- for (i = 0; i < num_swms; i++) {
- swms[i]->fp = fopen(swms[i]->filename, "rb");
- if (!swms[i]->fp) {
- ERROR_WITH_ERRNO("Failed to reopen `%s'",
- swms[i]->filename);
- return WIMLIB_ERR_OPEN;
- }
- swms[i]->out_fp = joined_wim->out_fp;
- swms[i]->hdr.part_number = 1;
- ret = for_lookup_table_entry(swms[i]->lookup_table,
- copy_resource, swms[i]);
- swms[i]->out_fp = NULL;
- fclose(swms[i]->fp);
- swms[i]->fp = NULL;
-
- if (ret != 0)
- return ret;
-
- if (progress_func) {
- progress.join.completed_bytes += swm_part_sizes[i];
- progress.join.completed_parts++;
- progress_func(WIMLIB_PROGRESS_MSG_JOIN_STREAMS, &progress);
+ /* Keep track of the compression type, chunk size, and GUID to make sure
+ * they are the same for all the WIMs. */
+ ctype = wim->compression_type;
+ chunk_size = wim->chunk_size;
+ guid = wim->hdr.guid;
+
+ {
+ /* parts_to_swms is not allocated at function scope because it
+ * should only be allocated after num_additional_swms was
+ * checked to be the same as wim->hdr.total_parts. Otherwise, it
+ * could be unexpectedly high and cause a stack overflow. */
+ WIMStruct *parts_to_swms[num_additional_swms];
+ ZERO_ARRAY(parts_to_swms);
+ for (unsigned i = 0; i < num_additional_swms; i++) {
+
+ WIMStruct *swm = additional_swms[i];
+
+ if (swm->compression_type != ctype) {
+ ERROR("The split WIMs do not all have the same "
+ "compression type");
+ return WIMLIB_ERR_SPLIT_INVALID;
+ }
+ if (swm->chunk_size != chunk_size &&
+ ctype != WIMLIB_COMPRESSION_TYPE_NONE) {
+ ERROR("The split WIMs do not all have the same "
+ "chunk size");
+ return WIMLIB_ERR_SPLIT_INVALID;
+ }
+ if (memcmp(guid, swm->hdr.guid, WIM_GUID_LEN) != 0) {
+ ERROR("The split WIMs do not all have the same "
+ "GUID");
+ return WIMLIB_ERR_SPLIT_INVALID;
+ }
+ if (swm->hdr.part_number == 1) {
+ ERROR("WIMs `%"TS"' and `%"TS"' both are marked "
+ "as the first WIM in the spanned set",
+ wim->filename, swm->filename);
+ return WIMLIB_ERR_SPLIT_INVALID;
+ }
+ if (swm->hdr.part_number == 0 ||
+ swm->hdr.part_number > total_parts)
+ {
+ ERROR("WIM `%"TS"' says it is part %u in the "
+ "spanned set, but the part number must "
+ "be in the range [1, %u]",
+ swm->filename, swm->hdr.part_number, total_parts);
+ return WIMLIB_ERR_SPLIT_INVALID;
+ }
+ if (parts_to_swms[swm->hdr.part_number - 2])
+ {
+ ERROR("`%"TS"' and `%"TS"' are both marked as "
+ "part %u of %u in the spanned set",
+ parts_to_swms[swm->hdr.part_number - 2]->filename,
+ swm->filename,
+ swm->hdr.part_number,
+ total_parts);
+ return WIMLIB_ERR_SPLIT_INVALID;
+ } else {
+ parts_to_swms[swm->hdr.part_number - 2] = swm;
+ }