On Thu, February 14, 2019 11:10 am, Alan Stern wrote:

>> The 'HUB descriptor' is not contained within the 'descriptors' file
>> from the '/sys' interface, although I suspect that it can be accessed
>> via _another_ file within '/sys'.... hopefully someone can point me at
>> it.
>
> No, there is no sysfs file containing the content of the hub
> descriptor.

:-(

>
> On the other hand, it's not too hard to write a program to retrieve the
> hub descriptor from a hub via usbfs or using libusb.  Or you can just copy
> the code in lsusb.

I will attempt coding something, or take some other approach in my
investigations.

Thank you both so much for your replies,
Simon

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