610                     # it's not a zombie/defunct. This is especially relevant for

   610                     # it's not a zombie/defunct. This is especially relevant for

   611                     # chg since the parent process won't die anytime soon.

   611                     # chg since the parent process won't die anytime soon.

   612                     # We use a thread to make the overhead tiny.

   612                     # We use a thread to make the overhead tiny.

   613                     def _do_wait():

   613                     def _do_wait():

   614                         os.waitpid(pid, 0)

   614                         os.waitpid(pid, 0)

   615                     threading.Thread(target=_do_wait, daemon=True).start()

   616                     threading.Thread(target=_do_wait, daemon=True).start()

   616                     return

   617                     return

   617                 # Parent process

   618                 # Parent process

   618                 (_pid, status) = os.waitpid(pid, 0)

   619                 (_pid, status) = os.waitpid(pid, 0)

   619                 if os.WIFEXITED(status):

   620                 if os.WIFEXITED(status):