Manually echo output

gilo.go

@@ -7,6 +7,22 @@ import (
 	"os"
 )
 
+func isAscii(char rune) bool {
+	ord := int(char)
+
+	return ord < 0x80
+}
+
+func isCtrl(char rune) bool {
+	if ! isAscii(char) {
+		return false
+	}
+
+	ord:= int(char)
+
+	return ord == 0x7f || ord < 0x20
+}
+
 func goRaw() (*term.State, error) {
 	state, err := term.MakeRaw(int(os.Stdin.Fd()))
 
@@ -14,11 +30,13 @@ func goRaw() (*term.State, error) {
 }
 
 func main() {
+	// Go to proper raw mode
 	oldState, err := goRaw()
 	if err != nil {
 		panic(err)
 	}
 
+	// Restore canonical mode at exit
 	defer term.Restore(int(os.Stdin.Fd()), oldState)
 
 	reader := bufio.NewReader(os.Stdin)
@@ -33,6 +51,12 @@ func main() {
 		case char == 'q':
 			fmt.Println("bye!\r")
 			return
-		}
+		case isCtrl(char):
+			fmt.Printf("%d\n", char)
+		default:
+			fmt.Printf("%d ('%c')\n", char, char)
+		}
+
+		_ = os.Stdout.Sync()
 	}
 }