Use SIGHUP to unblock sleep syscall

from logging import StreamHandler, getLogger, Formatter, DEBUG, INFO

from os import chdir, environ, getcwd, mkdir

from os.path import exists, join

from signal import signal, SIGHUP

from subprocess import Popen, check_call, DEVNULL, PIPE

from systemd.daemon import notify

from tarfile import open as tar

		hdlr.setFormatter(ABFormatter())

		getLogger().addHandler(hdlr)

		getLogger().setLevel(DEBUG if "AURBOT_DEBUG" in environ else INFO)

		# use sighup to unblock sleep syscall

		signal(SIGHUP, lambda signum, frame: info("SIGHUP received"))

		# parse command line

		args = parse_argv()

		# tell to systemd we are ready