Some improvements for terminal mode

main.go

@@ -32,9 +32,21 @@ func main() {
 	if res.column > 1 {
 		unix.Write(1, []byte("🚫\n")) // U+1F6AB
 	}
+
+	term, _ := unix.IoctlGetTermios(1, unix.TCGETS)
+	if term != nil {
+		term.Lflag = term.Lflag &^ unix.ECHO
+		unix.IoctlSetTermios(1, unix.TCSETS, term)
+	}
+
 	for _, b := range res.extraBytes {
 		unix.Syscall(unix.SYS_IOCTL, 0, unix.TIOCSTI, uintptr(unsafe.Pointer(&b)))
 	}
+
+	if term != nil {
+		term.Lflag = term.Lflag | unix.ECHO
+		unix.IoctlSetTermios(1, unix.TCSETS, term)
+	}
 }
 
 func awaitDSR() <-chan dsrResult {