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general OS X user-space GET_DESCRIPTOR device request?

Subject: general OS X user-space GET_DESCRIPTOR device request?
From: hotblack <email@hidden>
Date: Fri, 15 Mar 2002 21:26:57 +0000

The string is stored in the device. It is retrieved by a GET_DESCRIPTOR device request, see chapter 9 of the USB spec. The string is in Unicode format.

How you'd do anything about this in X I don't know yet.

Hi, IOUSBLib has nice friendly calls such as GetDevice<whatever> but what about more generalised usage of bRequest fields for obtaining other info. Using the example of USBGetManufacturerStringIndex, how can you, in the user-space, issue a GET_DESCRIPTOR call to retrieve the relevant info, specifying the bRequest, wValue, wIndex fields etc. I guess you'd use something along the lines of kUSBRqGetDescriptor (or kUSBRqGetStatus or whatever) I'm just not entirely sure how to do this, or if ot's possible to, from the user-space in OS X. Cheers,

ben
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