cleanup after sigkill

app.py

@@ -3,12 +3,28 @@ import os
 import subprocess
 import signal
 from pathlib import Path
+import tempfile
 
+mpv_pidfile = Path(tempfile.gettempdir()).joinpath("laas_mpv.pidfile")
 music_path = Path(os.environ.get("MUSIC_PATH", "./music"))
 mpv_process: subprocess.Popen | None = None
 app = Flask(__name__)
 
 
+def cleanup_unclean():
+    if mpv_pidfile.is_file():
+        print("Unclean shutdown detected")
+        try:
+            mpv_pid = int(open(mpv_pidfile, "r").read().strip())
+            print(f"Killing mpv process with pid {mpv_pid}")
+            os.kill(mpv_pid, signal.SIGTERM)
+        except Exception:
+            pass
+
+        mpv_pidfile.unlink()
+    pass
+
+
 def shutdown(status: int = 0):
     playback_stop()
     os._exit(status)
@@ -28,8 +44,9 @@ def playback_start():
             "--shuffle",
             str(music_path),
             "--no-video",
-        ]
+        ],
     )
+    open(mpv_pidfile, 'w').write(str(mpv_process.pid))
 
 
 def playback_stop():
@@ -38,6 +55,8 @@ def playback_stop():
         mpv_process.terminate()
         mpv_process.wait()
         mpv_process = None
+        if mpv_pidfile.exists():
+            mpv_pidfile.unlink()
 
 
 def is_playing():
@@ -122,6 +141,7 @@ def api_status():
 
 signal.signal(signal.SIGTERM, sigh)
 signal.signal(signal.SIGINT, sigh)
+cleanup_unclean()
 
 if not music_path.exists():
     music_path.mkdir()