Re: usbfs, claiming entire usb devices

[Kay Sievers]

On Fri, May 8, 2009 at 00:47, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:

>> Or is that a specific requirement where things would go wrong when the
>> kernel binds to a device first?
>
> You've got it. ÂSometimes devices are in a very precarious state (such
> as during a firmware update) and they need to go into a particular
> configuration. ÂLetting the kernel install some random configuration at
> such times doesn't work.

I see.

You mentioned earlier, that you would need to match the holder of the
"lock" and the one that accesses the device?

Wouldn't it be sufficient already, if you can take a "lock" at the
specific port, that prevents the kernel to access the device when it
shows up?

You thought of supporting a number of different users, with different
uids, or would that be a root-only action?

Thanks,
Kay
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