How to obtain the "ugen" that corresponds to an "ums", "uep" or "uhid"?

[Vitaly Magerya]

On 2014-09-15 15:07, Hans Petter Selasky wrote:
>> Hi, folks. Is there a way to obtain the name of an ugen device that
>> corresponds to a particular ums/uep/uhid device?
>
> Have you tried:
>
> usbconfig show_ifdrv

I haven't. It does look like a good solution though. Thank you.

>> It seems that we have the correct <address> number in the "devaddr"
>> variable, but the correct <unit> number is nowhere to be found.
>
> That might be a bug. We can easily add a unit=%d argument to the devd
> events, if not already there.

That would be great as well (although I won't be able to use this until 
the EoL of all FreeBSD versions without this feature, but it will 
simplify things afterwards).