Create lock file if service is running

1 files changed, 16 insertions, 0 deletions

diff --git a/service.py b/service.py
index 5e32f65..090cf6b 100755
--- a/service.py
+++ b/service.py
@@ -2,7 +2,9 @@
 import argparse
 import json
 import logging
+import os
 import signal
+import tempfile
 import time
 from threading import Thread
 from typing import Union
@@ -231,6 +233,17 @@ def str2bool(v: Union[str, bool, int]) -> bool:
 
 
 if __name__ == "__main__":
+    lock_file_path = os.path.join(tempfile.gettempdir(), "rwa-session-service.lock")
+
+    # Check for lock file
+    if os.path.exists(lock_file_path):
+        logging.error("The service is already running.")
+        exit(1)
+
+    # Create lock file
+    with open(lock_file_path, "w") as f:
+        f.write("lock")
+
     parser = argparse.ArgumentParser(description="D-Bus Session Service for RWA")
     parser.add_argument(
         "-m",
@@ -272,3 +285,6 @@ if __name__ == "__main__":
     signal.signal(signal.SIGINT, signal_handler)
 
     loop.run()
+
+    logging.info("Remove lock file ...")
+    os.remove(lock_file_path)
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