From: Daniel Mack <zonque@gmail.com>
Date: Fri, 15 Aug 2014 17:46:10 +0000 (+0200)
Subject: metadata: allow NULL pointers in kdbus_meta_append_data()
X-Git-Tag: upstream/0.20140911.160207utc~47
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5ce601fbfea4a2991ab9c50604e2e9b41fac07e2;p=platform%2Fcore%2Fsystem%2Fkdbus-bus.git

metadata: allow NULL pointers in kdbus_meta_append_data()

Allow NULL pointers to be passed as data argument to
kdbus_meta_append_data(), so users can use the function to only make space
in the metadata without actually copying any payload.
---

diff --git a/metadata.c b/metadata.c
index 267bb49..b2b27e6 100644
--- a/metadata.c
+++ b/metadata.c
@@ -162,7 +162,8 @@ int kdbus_meta_append_data(struct kdbus_meta *meta, u64 type,
 
 	item->type = type;
 	item->size = KDBUS_ITEM_HEADER_SIZE + len;
-	memcpy(item->data, data, len);
+	if (data)
+		memcpy(item->data, data, len);
 
 	return 0;
 }