In https://www.cons.org/cracauer/sigint.html it explains that the correct way to handle a termination signal is: > void sigint_handler(int sig) > { > [do some cleanup] > signal(SIGINT, SIG_DFL); > kill(getpid(), SIGINT); > } However, the above approach would prevent python context manager __exit__ routines from being called because SIG_DFL causes the interpreter to exit immediately. Therefore, something like this should be used instead: > class TermSig(Exception): > def __init__(self, signum, *args, **kwargs): > super(TermSig, self).__init__(*args, **kwargs) > self.signum = signum > > > def sig_handler(signum, frame): > raise TermSig(signum) > > > def main(): > return os.EX_OK > > > if __name__ = '__main__': > signal.signal(signal.SIGINT, sig_handler) > signal.signal(signal.SIGTERM, sig_handler) > signal.signal(signal.SIGHUP, sig_handler) > try: > sys.exit(main()) > except TermSig as e: > signal.signal(signum, signal.SIG_DFL) > os.kill(os.getpid(), e.signum)
