main: still use sys.exit

src/otaclient/main.py

@@ -23,6 +23,7 @@
 import multiprocessing.shared_memory as mp_shm
 import secrets
 import signal
+import sys
 import threading
 import time
 from functools import partial
@@ -44,7 +45,7 @@
 _shm: mp_shm.SharedMemory | None = None
 
 
-def _on_shutdown():
+def _on_shutdown(sys_exit: bool = False):
     global _ota_core_p, _grpc_server_p, _shm
     if _ota_core_p:
         _ota_core_p.terminate()
@@ -61,10 +62,13 @@ def _on_shutdown():
         _shm.unlink()
         _shm = None
 
+    if sys_exit:
+        sys.exit(1)
+
 
 def _signal_handler(signal_value, _) -> None:
     print(f"otaclient receives {signal_value=}, shutting down ...")
-    _on_shutdown()
+    _on_shutdown(sys_exit=True)
 
 
 def main() -> None:
@@ -157,11 +161,11 @@ def main() -> None:
                 f"otaclient will exit in {SHUTDOWN_AFTER_CORE_EXIT}seconds ..."
             )
             time.sleep(SHUTDOWN_AFTER_CORE_EXIT)
-            _on_shutdown()
+            return _on_shutdown()
 
         if not _grpc_server_p.is_alive():
             logger.error(
                 f"ota API server is dead, whole otaclient will exit in {SHUTDOWN_AFTER_API_SERVER_EXIT}seconds ..."
             )
             time.sleep(SHUTDOWN_AFTER_API_SERVER_EXIT)
-            _on_shutdown()
+            return _on_shutdown()