post_install()
{

	getent group ms-usb >/dev/null || /usr/sbin/groupadd -g 880 ms-usb

}


post_upgrade()
{
	getent group ms-usb >/dev/null || /usr/sbin/groupadd -g 880 ms-usb
}

post_remove()
{
        /usr/sbin/groupdel ms-usb > /dev/null 2>&1
}


op=$1
shift
$op $*