How to use the pproxy.sysproxy.setup function in pproxy

server, protocol = loop.run_until_complete(option.start_udp_server(vars(args)))
            servers.append(server)
        except Exception as ex:
            print('Start server failed.\n\t==>', ex)
    for option in args.rserver:
        if option.backward:
            print('Serving on', option.bind, 'backward by', ",".join(i.name for i in option.protos) + ('(SSL)' if option.sslclient else ''), '({}{})'.format(option.cipher.name, ' '+','.join(i.name() for i in option.cipher.plugins) if option.cipher and option.cipher.plugins else '') if option.cipher else '')
            try:
                server = loop.run_until_complete(option.backward.client_run())
                servers.append(server)
            except Exception as ex:
                print('Start server failed.\n\t==>', ex)
    if servers:
        if args.sys:
            from . import sysproxy
            args.sys = sysproxy.setup(args)
        if args.alived > 0 and args.rserver:
            asyncio.ensure_future(check_server_alive(args.alived, args.rserver, args.verbose if args.v else DUMMY))
        try:
            loop.run_forever()
        except KeyboardInterrupt:
            print('exit')
        if args.sys:
            args.sys.clear()
    for task in asyncio.Task.all_tasks():
        task.cancel()
    for server in servers:
        server.close()
    for server in servers:
        if hasattr(server, 'wait_closed'):
            loop.run_until_complete(server.wait_closed())
    loop.run_until_complete(loop.shutdown_asyncgens())