main.py: setpgrp() to prevent suddent termination

CHANGELOG.md

@@ -1,6 +1,8 @@
 # OpenCore Legacy Patcher changelog
 
 ## 0.6.7
+- Backend changes:
+  - Call `setpgrp()` to prevent app from being killed if parent process is killed (ie. LaunchAgents)
 
 ## 0.6.6
 - Implement option to disable ColorSync downgrade on HD 3000 Macs

resources/main.py

@@ -1,5 +1,6 @@
 # Copyright (C) 2020-2022, Dhinak G, Mykola Grymalyuk
 
+import os
 import sys
 import time
 import logging
@@ -46,6 +47,9 @@ class OpenCoreLegacyPatcher:
 
         self.constants.wxpython_variant: bool = True
 
+        # Ensure we live after parent process dies (ie. LaunchAgent)
+        os.setpgrp()
+
         # Generate OS data
         os_data = os_probe.OSProbe()
         self.constants.detected_os = os_data.detect_kernel_major()