On Wed, 21 Oct 2009 21:26:38 -0400 (EDT), Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > I can do it, if it's okay with you. Of course. As a lazy programmer, I abhor work. :-) > Another possibility is to return an initial segment of the data, up to > the first non-addressable buffer. Would that work? I don't know if > usbmon can handle storing a partial (> 0 but < transfer_buffer_length) > data block. I see your point. In most cases people only ever see first 32 bytes anyway, so... As far as I can tell from a quick look to refresh my memory, struct mon_bin_hdr is ready for it. It has two lenghts: len_urb and len_cap, exactly so you can capture partials. It cannot represent a list of segments with holes, but a short capture is ok. So with your proposal old applications can continue working (remember that in theory the buffer is visible through mmap). For the text, it always returned less than was transferred and in any case its internal structures are not visible to applications. The only consideration, then, is how painful it is for you to code this. -- Pete -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
