Lua Protect

-- Simple API to protect your program from being terminated by pressing and holding CTRL + T

local terminated = false
local useColor = term.isColor ~= nil and term.isColor()
local terminateEvent

local function runLocal(parallelFunc, password, func)
  local function pullEvent(...)
    local result = {os.pullEventRaw(...)}

    while result[1] == "terminate" do
      terminateEvent = true

      result = {os.pullEventRaw(...)}
    end

    return unpack(result)
  end

  local function warnTerminate()
    local x, y

    repeat
      x, y = term.getCursorPos()
      term.setCursorPos(1, 2)
      term.write("                                ")
      term.setCursorPos(1, 3)
      term.write("                      ")
      term.setCursorPos(x, y)

      repeat
        sleep(0.1)
      until terminateEvent or terminated

      if terminated then break end

      terminateEvent = false

      if useColor then
        term.setTextColor(colors.red)
      end

      x, y = term.getCursorPos()
      term.setCursorPos(1, 2)
      term.write("Terminate (CTRL + T) is blocked!")
      term.setCursorPos(1, 3)
      term.write("Please Enter Password!")
      term.setCursorPos(x, y)

      if useColor then
        term.setTextColor(colors.white)
      end

      sleep(2)
    until terminated
  end

  local function passwordCheck()
    local warnWrongPass = false

    repeat
      if warnWrongPass then
        term.clear()
        term.setCursorPos(1, 1)

        if useColor then
          term.setTextColor(colors.red)
        end

        term.write("Wrong Password!")

        sleep(2)

        if useColor then
          term.setTextColor(colors.white)
        end
      else
        warnWrongPass = true
      end

      term.clear()
      term.setCursorPos(1, 1)
      term.write("Enter passwort to terminate: ")
    until read("*") == password

    if useColor then
      term.setTextColor(colors.lime)
    end

    terminated = true

    term.write("Passwort correct!")
    term.setCursorPos(1, 3)
    term.write("Terminating...")
    term.setCursorPos(1, 4)

    if useColor then
      term.setTextColor(colors.white)
    end
  end

  local oldPullEvent = os.pullEvent
  terminateEvent = false
  terminated = false

  os.pullEvent = pullEvent

  parallelFunc(passwordCheck, warnTerminate, func)

  os.pullEvent = oldPullEvent
end

function run(password, func)
  runLocal(parallel.waitForAny, password, func)
end

function runNotify(password, func)
  runLocal(parallel.waitForAll, password, func)
end

function safeRun(func, ...)
  if func == nil then
    error("attempt to call nil", 2)
  end

  local ans

  repeat
    ans = {pcall(func, ...)}
  until ans[1]

  table.remove(ans, 1)
  return unpack(ans)
end

function isTerminated()
  return terminated
end