Check if another daemon is running

quiet-toggle-bar.py

@@ -1,9 +1,23 @@
 #!/usr/bin/env python3
 
+import os
+import sys
+import argparse
+import asyncio
 from subprocess import run, check_output
 from i3ipc.aio import Connection
 from i3ipc import Event
-import asyncio
+
+
+def check_daemon(kill=False):
+    name = os.path.basename(__file__)
+    pid = os.getpid()
+    pids = list(filter(lambda p: int(p) != pid, check_output(['pgrep', '-f', name]).split()))
+    if pids:
+        if kill:
+            run(['kill'] + pids)
+        else:
+            sys.exit('Another instance is running, kill it or run this command with the --kill option')
 
 async def main():
     def on_event(self, e):
@@ -20,4 +34,14 @@ def on_event(self, e):
     c.on(Event.WORKSPACE_FOCUS, on_event)
     await c.main()
 
-asyncio.get_event_loop().run_until_complete(main())
+parser = argparse.ArgumentParser(description='Toggle the statusbar on i3wm.')
+parser.add_argument('--kill', dest='kill', action='store_const',
+                    const=True, default=False,
+                    help='Kill any other running instance.')
+
+args = parser.parse_args()
+check_daemon(args.kill)
+try:
+    asyncio.get_event_loop().run_until_complete(main())
+except KeyboardInterrupt:
+    pass