Changing and resetting stty settings

test_stty.go

package main

import (
	"bytes"
	"fmt"
	"log"
	"os/exec"
	"os"
	"strings"
)

func setSttyState(f *os.File, state string) {
	outputbuf := new(bytes.Buffer)
	cmd := exec.Command("stty", state)
	cmd.Stdin = f
	cmd.Stdout = outputbuf
	cmd.Stderr = os.Stderr
	cmd.Run()
}

func getSttyState(f *os.File) (state string) {
	outputbuf := new(bytes.Buffer)
	cmd := exec.Command("stty", "-g")
	cmd.Stdin = f
	cmd.Stdout = outputbuf
	cmd.Run()
	return strings.TrimSuffix(outputbuf.String(), "\n")
}

func main() {
	fh, err := os.OpenFile("/dev/tty", os.O_RDWR, 0666)
	if err != nil {
		log.Fatal(err)
	}
	before := getSttyState(fh)
	fmt.Printf("before:\t\t%s\n", before)

	// set new state: -echo (do not echo back typed in characters)
	setSttyState(fh, "-echo")

	fmt.Printf("new:\t\t%s\n", getSttyState(fh))

	setSttyState(fh, before)
	fmt.Printf("reset:\t\t%s\n", getSttyState(fh))
}

test_stty.sh

#!/usr/bin/env bash

old_state=$(stty -g < /dev/tty)
printf "before:\t %s\n" $old_state
stty -echo < /dev/tty
printf "new:\t %s\n" $(stty -g < /dev/tty)
stty $old_state < /dev/tty
printf "reset:\t %s\n" $(stty -g </dev/tty)