Nonfunctional os.pullEvent and redstone code

Here is some code to create a hack-switch for any energy-net or redstone stuff, basically, place when there's redstone, break when there isn't. I just want to know why the broken code is, well, broken.
This works:

if redstone.getInput("back") then
  turtle.place()
  else
	turtle.dig()
end

while true do
  if os.pullEvent() then
	if redstone.getInput("back") then
	  turtle.place()
	  else
	  turtle.dig()
	end
  end
end

This doesn't work:

while true do
  local msg, p1, p2 = os.pullEvent()

	rsstate = rs.getInput("back")
	--debug: comment me out:
	print(rsstate)
	if rsstate == true then
	  turtle.place()
	  elseif rsstate == false then
		turtle.dig()
	  else
		error("MY REDSTONE STATE ISNT A BOOLEAN!!!1!!")
	end

end

What's the print outputting?

Lyqyd, on 03 July 2013 - 06:56 PM said:

What's the print outputting?

Supposedly if the redstone is on or off. AFAIK it worked.

No, not what it supposedly outputs, what it actually outputs when the code is run and the redstone state changed.