On Sat, Mar 19, 2016 at 08:45:59AM +0000, Michael van Elst wrote: > That's a can of worms. You don't even know what a particular ugen* > device is until you opened and queried it. Here is my original suggestion: http://mail-index.netbsd.org/tech-userlevel/2015/10/25/msg009389.html Martin