--- /dev/null
+# Copyright (c) 2015 Samsung Electronics Co., Ltd All Rights Reserved
+#
+# 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.
+
+# This function takes up to two arguments:
+# 1. error message
+# 2. exit code (default: 1)
+#
+# Example: test -n "$VAR" || die "VAR is not set!" 5
+# If variable $VAR is not set, "VAR is not set!" will be printed on stderr
+# and script in which it was invoked will exit with exit code equal to 5.
+#
+# Author: Aleksander Mistewicz <a.mistewicz@samsung.com>
+
+die() {
+ printf >&2 -- '%s\n' "$1"
+ exit ${2:-1}
+}