#!/bin/sh
[ -z "$1" ] && (echo "Error: missing argument (what to remain)" && exit)
for oldname in "$@"
do
	newname=`echo "$oldname" | tr '[:upper:]' '[:lower:]' | sed 's/\ /_/g; s/Ö/oe/g; s/Ä/ae/g; s/Ü/ue/g; s/ö/oe/g; s/ä/ae/g; s/ü/ue/g; s/ß/ss/g'`;
	if [[ "$oldname" != "$newname" ]]; then
		mv "$oldname" "$newname";
	fi
done