#! /bin/sh
renice 20 -p $$
for file in "$@";do
	if [ "$file" = "${file%.qcow2}" ];then
		echo >&2 "Invalid: <$file>"
		exit 1
	fi
done
for file in "$@";do
	ls -l "$file"
	du -sh "$file"
	set -xe
	mv -i "$file" "$file"-src
	rm -f "$file"-dest
	time qemu-img convert -c -f qcow2 "$file"-src -O qcow2 "$file"-dest
	mv -i "$file"-dest "$file"
	rm -f "$file"-src
	set +xe
	ls -l "$file"
	du -sh "$file"
done
echo done