//go:build !windows

package cat

import "golang.org/x/sys/unix"

// setSocketReuse is the Unix half of the Windows SO_REUSEADDR above. Linux
// wants SO_REUSEPORT as well before two processes may share a bound UDP port;
// it is not defined on every Unix, so a refusal there is ignored.
func setSocketReuse(fd uintptr) error {
	if err := unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEADDR, 1); err != nil {
		return err
	}
	_ = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
	return nil
}