[Mageia-dev] dropping /proc/bus/sub (Re: [changelog] [RPM] cauldron core/release systemd-189-2.mga3)

[Thierry Vignaud]

On 29 August 2012 16:06, Thierry Vignaud <thierry.vignaud at gmail.com> wrote:
>>> Is there any migration to do in drakx and ldetect because of this?
>>
>> Oh yeah I meant to send a message to the list about this.
>>
>> Yeah because we're now on kernel 3.5 we can no longer do certain things
>> relating to this mount point.
>>
>> IIRC some ldetect stuff used it and some of the 3G and/or
>> printer/scanner stuff might also depend on it and need to be migrated
>> too. I don't know that code very well, but I know some folks complained
>> when we stopped mounting it by default, so I've no doubt that it's use
>> is lurking somewhere!
>>
>> I would guess that in some cases /dev/bus/usb/ might be sufficient for
>> what is needed.
>
> Humm...
> I've still around a patch making ldetect using libusb.
> Sadly, we're missing some data...
> Basically we would miss the kernel driver name binded with each usb device.
>
> We cannot workaround it since libusb misses with the ability to either
> query the sysfs device path or to got the Port number
> ("Port" in /proc/bus/usb/devices).
> (I miss the Port number in order to compute the
> /sys/bus/devices/usb/foobar path)
>
> W/o that I cannot retrieve the modalias which would help me to get the kernel
> driver name.
>
> I guess I'll have to resurect that work and try harder to find some
> workaround...

I'd also a minimal module reusing code from usbutils.
If I remember, upstream author wasn't opposed to have some libusbutils library.