ignore errors during setting up signal handlers

Windows has limited support for signals so might fail there.
This change just makes the failure silent and then only depend on atexit handlers for cleanup

Author: lutzfischer

dirlock/__init__.py

@@ -68,10 +68,17 @@ def handle_sigterm_cleanup(signum, frame):
 # normal exit clean up
 atexit.register(_clean_locks)
 
-# ctrl+c cleanup
-signal.signal(signal.SIGINT, handle_sigint_cleanup)
-# sigterm cleanup
-signal.signal(signal.SIGTERM, handle_sigterm_cleanup)
+try:
+    # ctrl+c cleanup
+    signal.signal(signal.SIGINT, handle_sigint_cleanup)
+except Exception:
+    pass
+
+try:
+    # sigterm cleanup
+    signal.signal(signal.SIGTERM, handle_sigterm_cleanup)
+except Exception:
+    pass
 
 
 class DirLock: