Food processor, blender, sure they work... You will need to smallish batches of grain and pulse the machine to get the desired chop...not ideal, but certainly will work...cheers!
I've heard that you can mill about 1/2 lb at a time in a food processor/blender. It's going to take you a long time, and it's going to produce inconsistent results at best.
Where did you buy the grain? Any halfway decent online store or homebrew shop will mill the grain for you, just ask next time.