Okay, I admit this is from udev 73 so maybe Someone With A Clue™ suddenly appeared before the udev people.
Anyway, why on earth do they do this:
MEDIA=`cat $x`

Why? Why? WHY?
Maybe because they are all superior or oblivious to people trying to keep their initrd small and thus removing cat from it? Nooo, they would never not think of us, now would they?
Hint:
read MEDIA < $x



EOF