if [ -f /etc/crypttab ]; then
                # we need luks support!
                if ! /sbin/cryptsetup --help | grep -q luksFormat ; then
                        echo "Error: We need cryptsetup luks"
                else
                        # open luks devices
                        sed 's/#.*$//g' /etc/crypttab | tr '\t' ' ' | grep -v -e '^$' | while read DEVICE MAPPING
                        do
                                if [ -z "$DEVICE" ] || [ ! -e "$DEVICE" ] ; then
                                        echo "Unable to find \"$DEVICE\""
                                        continue
                                elif ! /sbin/cryptsetup isLuks "$DEVICE" ; then
                                        echo "\"$DEVICE\" doesn't seem to be a Luks encrypted volume"
                                        continue
                                fi

                                run_with_msg "Opening device $DEVICE:\n" "/sbin/cryptsetup luksOpen $DEVICE $MAPPING"

                        done
                fi
        fi