def killdaemons(pidfile, tryhard=True, remove=False, logfn=None):

    if not logfn:

        logfn = lambda s: s

    # Kill off any leftover daemon processes

    try:

        fp = open(pidfile)

        for line in fp:

            try:

                pid = int(line)

            except ValueError:

                continue

            try:

                logfn('# Killing daemon process %d' % pid)

                os.kill(pid, signal.SIGTERM)

                if tryhard:

                    for i in range(10):

                        time.sleep(0.05)

                        os.kill(pid, 0)

                else:

                    time.sleep(0.1)

                    os.kill(pid, 0)

                logfn('# Daemon process %d is stuck - really killing it' % pid)

                os.kill(pid, signal.SIGKILL)

            except OSError, err:

                if err.errno != errno.ESRCH:

                    raise

        fp.close()

        if remove:

            os.unlink(pidfile)

    except IOError:

        pass

if __name__ == '__main__':

    killdaemons(os.environ['DAEMON_PIDS'])