X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fwrite.c;h=178a88acb89d0e7a08cde2a2b0c8c1c2372f7e12;hp=879a3102ddce6e246e46716eea37c9af2f9d37a0;hb=c48e2f84645abe34faec4994605d7a7b3b451672;hpb=8eb500e74f1508c4722df217fb60bdf4710fbff6

diff --git a/src/write.c b/src/write.c
index 879a3102..178a88ac 100644
--- a/src/write.c
+++ b/src/write.c
@@ -795,7 +795,7 @@ write_blob_uncompressed(struct blob_descriptor *blob, struct filedes *out_fd)
 	if (filedes_seek(out_fd, begin_offset) == -1)
 		return 0;
 
-	ret = extract_full_blob_to_fd(blob, out_fd);
+	ret = extract_blob_to_fd(blob, out_fd);
 	if (ret) {
 		/* Error reading the uncompressed data.  */
 		if (out_fd->offset == begin_offset &&
@@ -1615,13 +1615,11 @@ write_blob_list(struct list_head *blob_list,
 	/* Read the list of blobs needing to be compressed, using the specified
 	 * callbacks to execute processing of the data.  */
 
-	struct read_blob_list_callbacks cbs = {
-		.begin_blob		= write_blob_begin_read,
-		.begin_blob_ctx		= &ctx,
-		.consume_chunk		= write_blob_process_chunk,
-		.consume_chunk_ctx	= &ctx,
-		.end_blob		= write_blob_end_read,
-		.end_blob_ctx		= &ctx,
+	struct read_blob_callbacks cbs = {
+		.begin_blob	= write_blob_begin_read,
+		.consume_chunk	= write_blob_process_chunk,
+		.end_blob	= write_blob_end_read,
+		.ctx		= &ctx,
 	};
 
 	ret = read_blob_list(blob_list,
@@ -1689,16 +1687,6 @@ write_file_data_blobs(WIMStruct *wim,
 
 	write_resource_flags = write_flags_to_resource_flags(write_flags);
 
-	/* wimlib v1.7.0: create a solid WIM file by default if the WIM version
-	 * has been set to WIM_VERSION_SOLID and at least one blob in the WIM's
-	 * blob table is located in a solid resource (may be the same WIM, or a
-	 * different one in the case of export).  */
-	if (wim->out_hdr.wim_version == WIM_VERSION_SOLID &&
-	    wim_has_solid_resources(wim))
-	{
-		write_resource_flags |= WRITE_RESOURCE_FLAG_SOLID;
-	}
-
 	if (write_resource_flags & WRITE_RESOURCE_FLAG_SOLID) {
 		out_chunk_size = wim->out_solid_chunk_size;
 		out_ctype = wim->out_solid_compression_type;
@@ -1757,6 +1745,13 @@ write_wim_resource_from_buffer(const void *buf,
 	int ret;
 	struct blob_descriptor blob;
 
+	if (unlikely(buf_size == 0)) {
+		zero_reshdr(out_reshdr);
+		if (hash_ret)
+			copy_hash(hash_ret, zero_hash);
+		return 0;
+	}
+
 	blob_set_is_located_in_attached_buffer(&blob, (void *)buf, buf_size);
 	sha1_buffer(buf, buf_size, blob.hash);
 	blob.unhashed = 0;
@@ -2625,6 +2620,15 @@ write_pipable_wim(WIMStruct *wim, int image, int write_flags,
 	 * finish_write().  */
 }
 
+static bool
+should_default_to_solid_compression(WIMStruct *wim, int write_flags)
+{
+	return wim->out_hdr.wim_version == WIM_VERSION_SOLID &&
+		!(write_flags & (WIMLIB_WRITE_FLAG_SOLID |
+				 WIMLIB_WRITE_FLAG_PIPABLE)) &&
+		wim_has_solid_resources(wim);
+}
+
 /* Write a standalone WIM or split WIM (SWM) part to a new file or to a file
  * descriptor.  */
 int
@@ -2712,6 +2716,12 @@ write_wim_part(WIMStruct *wim,
 	else
 		wim->out_hdr.wim_version = WIM_VERSION_DEFAULT;
 
+	/* Default to solid compression if it is valid in the chosen WIM file
+	 * format and the WIMStruct references any solid resources.  This is
+	 * useful when exporting an image from a solid WIM.  */
+	if (should_default_to_solid_compression(wim, write_flags))
+		write_flags |= WIMLIB_WRITE_FLAG_SOLID;
+
 	/* Set the header flags.  */
 	wim->out_hdr.flags = (wim->hdr.flags & (WIM_HDR_FLAG_RP_FIX |
 						WIM_HDR_FLAG_READONLY));
@@ -2739,9 +2749,9 @@ write_wim_part(WIMStruct *wim,
 	if (write_flags & WIMLIB_WRITE_FLAG_RETAIN_GUID)
 		guid = wim->hdr.guid;
 	if (guid)
-		memcpy(wim->out_hdr.guid, guid, WIMLIB_GUID_LEN);
+		copy_guid(wim->out_hdr.guid, guid);
 	else
-		randomize_byte_array(wim->out_hdr.guid, WIMLIB_GUID_LEN);
+		generate_guid(wim->out_hdr.guid);
 
 	/* Set the part number and total parts.  */
 	wim->out_hdr.part_number = part_number;
@@ -2989,6 +2999,12 @@ overwrite_wim_inplace(WIMStruct *wim, int write_flags, unsigned num_threads)
 	if (write_flags & WIMLIB_WRITE_FLAG_SOLID)
 		wim->out_hdr.wim_version = WIM_VERSION_SOLID;
 
+	/* Default to solid compression if it is valid in the chosen WIM file
+	 * format and the WIMStruct references any solid resources.  This is
+	 * useful when updating a solid WIM.  */
+	if (should_default_to_solid_compression(wim, write_flags))
+		write_flags |= WIMLIB_WRITE_FLAG_SOLID;
+
 	/* Set additional flags for overwrite.  */
 	write_flags |= WIMLIB_WRITE_FLAG_OVERWRITE |
 		       WIMLIB_WRITE_FLAG_STREAMS_OK;