time

local fs = require("filesystem")

function os.dateRL(format)
  if not fs.get("/").isReadOnly() then
    local time = io.open("/tmp/.time", "w")
      time:write()
        time:close()
        os.sleep(0.01)
      return os.date(format, fs.lastModified("/tmp/.time") / 1002.7)
  else
    return os.date(format)
  end
end

print(os.dateRL("%x %X"))