#!/bin/sh

set -e

case "$1" in
    start)
	loopdev=$(losetup --show -f /data/swapfile)
	swapon $loopdev
	;;
    stop)
	loopdev=$(losetup -j /data/swapfile | grep -o "/dev/loop[0-9]*")
	swapoff $loopdev
	losetup -d $loopdev
	;;
    restart)
	loopdev=$(losetup -j /data/swapfile | grep -o "/dev/loop[0-9]*")
	swapoff $loopdev
	swapon $loopdev
	;;
    *)
	echo "Usage: $0 { start | stop | restart }" >&2
	exit 1
	;;
esac