upload android base code part6

android/system/timezone/tzdatautil.py

@@ -0,0 +1,33 @@
+# Copyright 2017 The Android Open Source Project
+#
+# 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.
+
+import os
+import sys
+
+"""Shared functions for use in tzdata scripts."""
+
+def GetIanaTarFile(dir_name):
+  matching_files = []
+  for filename in os.listdir(dir_name):
+    if filename.startswith('tzdata20') and filename.endswith('.tar.gz'):
+      matching_files.append(filename);
+
+  if len(matching_files) == 0:
+    return None
+  elif len(matching_files) == 1:
+    return '%s/%s' % (dir_name, matching_files[0])
+  else:
+    print 'Multiple tzdata files found unexpectedly %s' % matching_files
+    sys.exit(1)
+