get start time of a process

smilejay · smilejay · commit 7ccfe40ca3bf · 2018-01-20T20:58:47.000+08:00
diff --git a/py2018/proc_start_time.py b/py2018/proc_start_time.py
@@ -0,0 +1,23 @@
+'''
+get the start time of a process
+e.g. python proc_start_time.py -p 12345
+'''
+import argparse
+import psutil
+import os
+import time
+
+
+def get_start_time(pid):
+    ''' return the start time in human readable string '''
+    p = psutil.Process(int(pid))
+    return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(p.create_time()))
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-p", "--pid", help="PID of a process")
+    args = parser.parse_args()
+    if not args.pid:
+        args.pid = os.getpid()
+    print get_start_time(args.pid)
