return nil, &OpError{Op: "file", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
	}
	return
}

// ListenTCP acts like [Listen] for TCP networks.
//
// The network must be a TCP network name; see func Dial for details.
//
// If the IP field of laddr is nil or an unspecified IP address,
// ListenTCP listens on all available unicast and anycast IP addresses
// of the local system.

	return ln.fd.Close()
}

func (ln *TCPListener) file() (*os.File, error) {
	f, err := ln.fd.dup()
	if err != nil {
		return nil, err
	}
	return f, nil
}

func (sl *sysListener) listenTCP(ctx context.Context, laddr *TCPAddr) (*TCPListener, error) {
	return sl.listenTCPProto(ctx, laddr, 0)
}

func (sl *sysListener) listenTCPProto(ctx context.Context, laddr *TCPAddr, proto int) (*TCPListener, error) {

// client to connect to it. It returns a recordingConn that wraps the resulting
// connection.
func (test *serverTest) connFromCommand() (conn *recordingConn, child *exec.Cmd, err error) {
	l, err := net.ListenTCP("tcp", &net.TCPAddr{
		IP:   net.IPv4(127, 0, 0, 1),
		Port: 0,
	})
	if err != nil {
		return nil, nil, err
	}
	defer l.Close()

	port := l.Addr().(*net.TCPAddr).Port

	var command []string

String id=118
	data="syscall.Bind"
String id=119
	data="net.(*netFD).listenStream"
String id=120
	data="net.(*sysListener).listenTCPProto"
String id=121
	data="net.(*sysListener).listenTCP"
String id=122
	data="net.(*ListenConfig).Listen"
String id=123
	data="net.Listen"
String id=124
	data="runtime.(*scavengerState).park"
String id=125