#!/bin/sh
dd_bs=1
dd_ct=512
dd_if=/dev/urandom
devswp=/dev/sda5
dm=/dev/mapper/cswp
mapdev="cswp"
cs_opton="-q -c aes -d - create"
cs_optoff="remove"

case "$1" in
        start)
            dd if=/dev/urandom bs=1 count=512 | cryptsetup -q -c aes -d - create $mapdev $devswp
            mkswap $dm
            swapon $dm
            if [ "$?" == 0 ]; then
                echo "Started temporary swap device successfully."
            else
                echo "Failed to create temporary swap device."
            fi
            ;;
        stop)
            swapoff $dm
            cryptsetup $cs_optoff $mapdev
            if [ "$?" == 0 ]; then
                echo "Removed temporary swap device successfully."
            else
                echo "Failed to remove temporary swap device."
            fi
            ;;
        *)
            echo "Usage: /etc/init.d/mkcswap {start|stop}"
            exit 1
            ;;
esac

exit 0