Is there an easy way to detect, from Lua and perhaps via $updates, whether the machine has awoken?

[LinuxOnTheDesktop]

I have Lua scripts that in elaborate fashion that determine whether the machine has awoken recently. (I have a shell script that runs on wake and then a Lua script that reads the timestamp of that file.) It occurred to me though that perhaps the value returned by conky_parse("${updates}") might reset after wake. Now, admittedly, I should test this myself . .

[LinuxOnTheDesktop]

I have tested and I find that $updates does not reset after sleep.