Re: [Libusb-devel] Information in /proc/bus/usb/BB/ddd

[Johannes E. <joh...@er...>]

On Wed, Apr 02, 2003, Manish Madan <mm...@no...> wrote:
>        I am planning to write routines to detect particulars of all
> existing USB devices on a Linux system. This information is available in
> /proc/bus/usb/devices file. And also /proc/bus/usb/BB/ddd files (where
> BB are bus numbers and ddd are device numbers). I realise that it would
> be more efficient to read and interpret the binary data in the ddd files
> than write parsing routines for the usb/devices file. The only problem
> is, I do not know how information is dumped into the binary "ddd" files.
> For example, which two bytes hold the vendor id ? I couldn't find
> documentation for this. Could anyone help please...

Why don't you use libusb? It does this all for you. I assume that's why
you're posting on this list.

However, if you really want to know what the data is, look at the USB
spec. It's the device descriptor.

JE