Forcing Python process to exit with parent

exit_with_parent.py

import ctypes
import sys

def parent_death_pact(signal=signal.SIGINT):
    """Commit to kill current process when parent process dies.
    Each time you spawn a new process, run this to set signal
    handler appropriately (e.g put it at the beginning of each
    script, and in multiprocessing startup code)."""
    assert sys.platform == 'linux', \
        "this fn only works on Linux right now"
    libc = ctypes.CDLL("libc.so.6")
    # see include/uapi/linux/prctl.h in kernel
    PR_SET_PDEATHSIG = 1
    # last three args are unused for PR_SET_PDEATHSIG
    retcode = libc.prctl(PR_SET_PDEATHSIG, signal, 0, 0, 0)
    if retcode != 0:
        raise Exception("prctl() returned nonzero retcode %d" % retcode)