#!/usr/bin/env ruby

require 'expect'
require 'open3'

Open3.popen3("/bin/bash") do
    | input, output, error, wait_thr |
    input.sync = true
    output.sync = true

    input.puts "ls /tmp"
    puts output.expect("\n", 5)

    input.puts "ls /etc"
    puts output.expect("\n", 5)
end