Echo keyboard input (useful to print out escape codes)

echochars.lua

os.execute("/usr/bin/env stty raw -echo 2> /dev/null")

local term = require "term"

local function loop()
    local char
    repeat
        term.cursor.save()
        char = io.stdin:read(1)

        print("- " .. char:byte(1) .. ": " .. char)

        term.cursor.restore()
        term.cleareol()
    until char == "\r"
end

pcall(loop)

os.execute("/usr/bin/env stty sane")