Ensuring subprocesses are dead on exiting Python program

Question

Is there a way to ensure all created subprocess are dead at exit time of a Python program? By subprocess I mean those created with subprocess.Popen().

If not, should

Answer 1

Find out a solution for linux (without installing prctl):

def _set_pdeathsig(sig=signal.SIGTERM):
    """help function to ensure once parent process exits, its childrent processes will automatically die
    """
    def callable():
        libc = ctypes.CDLL("libc.so.6")
        return libc.prctl(1, sig)
    return callable


subprocess.Popen(your_command, preexec_fn=_set_pdeathsig(signal.SIGTERM))