run_hook ()
{
     if grep -qw arch-addons /proc/cmdline; then
     	ARCH_ADDON="optical storage floppy disk"
     	### exclude kernel ntfs it seems broken!
     	echo "Disabling kernel NTFS module for mounting, due to known issues!"
     	mv /lib/modules/$(uname -r)/kernel/fs/ntfs/ntfs.ko /lib/modules/$(uname -r)/kernel/fs/ntfs/ntfs.ko.old
     	echo " Waiting 10 seconds for usb/fw devices to come ready ..."
     	sleep 10
     	for i in $ARCH_ADDON; do
		echo "Checking $i devices for addons ..."
			for k in $(find /dev -maxdepth 1 -group "$i"); do
     				if mount $k /addons > /dev/null 2>&1; then
					echo "Looking for new config files on $k, checking /config directory ..."
					if [ -d "/addons/config" ]; then
						echo "Copying new config files to /etc install environment ..."
						cp -r /addons/config/* /etc/
						echo "Finished."
						RETRIGGER_UDEV="1"
					else
						echo "No files found to copy in /config directory on media $i."
					fi
					echo "Looking for new packages to install on $k, checking /packages directory ..."
					if [ -d "/addons/packages" ]; then
						mkdir /tmp/packages/
						echo "Copying new packages to /tmp/packages/ install environment ..."
						cp /addons/packages/*.pkg.tar.gz /tmp/packages/
						echo "Installing new packages to install environment ..."
						pacman -A /tmp/packages/* || echo "Dependency resolution failed!"
						RETRIGGER_UDEV="1"
					else
						echo "No new files found to copy and install in /packages directory on media $k."
					fi
					umount /addons
					sleep 2
				fi
			done
     	done
    	mv /lib/modules/$(uname -r)/kernel/fs/ntfs/ntfs.ko.old /lib/modules/$(uname -r)/kernel/fs/ntfs/ntfs.ko
    	if [ "$RETRIGGER_UDEV" = "1" ]; then
     		echo "Retrigger udev uevents ..."
     		/etc/start_udev uevents
    	fi
    else
	echo "ARCH_ADDONS USAGE:"
	echo "------------------"
	echo "By default loading is disabled!"
    	echo "In order to load external addon packages or configs" 
	echo "into install environment, please append arch-addons to boot prompt."
    	echo "Place external addon packages in /packages directory."
	echo "Place external configs in /config directory."
	echo "------------------"
	echo "Message is displayed 10 seconds ..."
	echo ""
    	sleep 10
    fi
}