AMBARI-852. Improve REST API functionality regarding query and partial response (John Speidel via mahadev)

git-svn-id: https://svn.apache.org/repos/asf/incubator/ambari/branches/AMBARI-666@1398662 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 38 insertions, 0 deletions

diff --git a/ambari-agent/src/main/python/ambari_agent/ProcUtil.py b/ambari-agent/src/main/python/ambari_agent/ProcUtil.py
new file mode 100644
index 0000000000..d02b331ca6
--- /dev/null
+++ b/ambari-agent/src/main/python/ambari_agent/ProcUtil.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python2.6
+
+'''
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you 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 sys
+import os
+
+def get_proc_status(pid):
+  pid = int(pid)
+  path = ("/proc/%d/status" % pid)
+  if not os.path.exists(path):
+    return None
+  status_file = open(path)
+  lines = status_file.readlines()
+  for line in lines:
+    if line.startswith("State:"):
+      return line.split(":",1)[1].strip().split(' ')[0].split(" ",1)[0]
+  return None
+    
+if __name__ == '__main__':
+  state = get_proc_status(sys.argv[1])
+  print state