Handling PID file from within init script

dataLogger.py

@@ -9,8 +9,6 @@ from pycomm_helper.alarm import AnalogAlarm, bitAlarm
 import traceback
 import json
 import requests
-import os
-import sys
 
 from requests.packages.urllib3.exceptions import InsecureRequestWarning
 from requests.packages.urllib3.exceptions import InsecurePlatformWarning
@@ -319,16 +317,4 @@ def main():
             print("Error during loop: {}".format(e))
             traceback.print_exc()
 if __name__ == '__main__':
-    pid = str(os.getpid())
-    pidfile = "/root/datalogger.pid"
-
-    if os.path.isfile(pidfile):
-        print "%s already exists, exiting" % pidfile
-        sys.exit()
-
-    try:
-        file(pidfile, 'w').write(pid)
-        main()
-    except IOError:
-        print("Unable to write the PID to {}. Running the datalogger anyway.".format(pidfile))
-        main()
+    main()

datalogger.sh

@@ -21,7 +21,7 @@ start() {
   fi
   echo 'Starting service…' >&2
   local CMD="$SCRIPT &> \"$LOGFILE\" & echo \$!"
-  su -c "$CMD" $RUNAS > /dev/null
+  su -c "$CMD" $RUNAS > "$PIDFILE"
   echo 'Service started' >&2
 }