const golang.org/x/sys/unix.ECHO

2 uses

	golang.org/x/sys/unix (current package)
		zerrors_darwin_arm64.go#L427: 	ECHO                              = 0x8

	src.elv.sh/pkg/sys
		termios.go#L58: 	setFlag(&term.Lflag, unix.ECHO, v)