Add licence document and per-file headers
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
diff --git a/util.c b/util.c
index 11f6090..d6e037a 100644
--- a/util.c
+++ b/util.c
@@ -1,4 +1,18 @@
-
+/**
+ * Copyright © 2016 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
#include <err.h>
#include <unistd.h>