OpenRC LUKS Automount

#!/sbin/openrc-run
# Decrypt and mount /home

DEV=/dev/sda6
DEV_NAME=home
DEV_MAPPED=/dev/mapper/$DEV_NAME
MOUNTPOINT=/home

depend() {
	need localmount
	#need device_mapper
	need dmcrypt
}

start () {
	ebegin "Opening encrypted $DEV"
	if [ ! -e $DEV_MAPPED ]; then
		cat /etc/luks | cryptsetup luksOpen $DEV $DEV_NAME || \
			eerror $? "Error opening device $DEV"
	else
		eerror "Error: device $DEV_MAPPED already mapped"
		return 1
	fi
	if ! grep -qw $DEV_MAPPED /proc/mounts && \
		! grep -qw $MOUNTPOINT /proc/mounts; then
			mount $DEV_MAPPED $MOUNTPOINT || \
				eerror $? "Error mounting mapped device $DEV_MAPPED"
	else
		eerror "Error: mapped device $DEV_MAPPED already mounted or mountpoint $MOUNTPOINT busy"
		return 2
	fi
	eend ${?}
}

stop() {
	ebegin "Closing encrypted $DEV"
	if egrep -qw "$DEV_MAPPED * $MOUNTPOINT" /proc/mounts; then
		#sync $MOUNTPOINT || \
		#	eerror $? "Error syncing mountpoint $MOUNTPOINT"
		umount $MOUNTPOINT || \
			eerror $? "Warning: unmounting $DEV_MAPPED from $MOUNTPOINT"
	else
		echo "Warning: device $DEV_MAPPED not mounted at $MOUNTPOINT"
		echo "Continue stopping? Yes/No"
		read CONTINUE;
		if [[ x$CONTINUE != xYes ]]; then
			eerror "Exiting"
			return 5
		fi
	fi
	if [ -e $DEV_MAPPED ]; then
		cryptsetup luksClose $DEV_NAME || \
			echo $? "Error closing mapped device $DEV_MAPPED ($DEV_NAME)"
	else
		eerror "Error: mapped device $DEV doesn\'t exist"
		return 4
	fi
	eend ${?}
}