bpo-26434: Fix multiprocessing grandchilds in a Windows service (GH-1167)
Patch by Davin with help from Marc.
diff --git a/Lib/multiprocessing/forking.py b/Lib/multiprocessing/forking.py
index d393817..9412eb1 100644
--- a/Lib/multiprocessing/forking.py
+++ b/Lib/multiprocessing/forking.py
@@ -405,7 +405,8 @@
if _logger is not None:
d['log_level'] = _logger.getEffectiveLevel()
- if not WINEXE and not WINSERVICE:
+ if not WINEXE and not WINSERVICE and \
+ not d['sys_argv'][0].lower().endswith('pythonservice.exe'):
main_path = getattr(sys.modules['__main__'], '__file__', None)
if not main_path and sys.argv[0] not in ('', '-c'):
main_path = sys.argv[0]