#!/bin/sh

pref='com.apple.finder AppleShowAllFiles'

function evalpref {
	defaults read $pref
	return;
	}

case $(evalpref) in
	FALSE)
		echo "Hidden Files Visible"
		defaults write $pref TRUE;;
	TRUE)
		echo "Hidden Files Invisible"
		defaults write $pref FALSE;;
	!FALSE | !TRUE)
		echo "Error: Current value of $pref: $(evalpref)";;
esac

killall "Finder"