Passing File Descriptors Over The X Protocol Socket
Written by Michael Larabel in X.Org on 6 October 2012 at 04:25 AM EDT. 4 Comments
Keith Packard has been working on support for passing file descriptors over the X protocol socket as part of the work of DRI-Next, a.k.a. the "DRI3" undertaking.

Passing of file descriptors over the X protocol socket is needed if using the DMA-BUF interfaces for passing DRI objects between the client and server, which is one of the main features of DRI-Next/DRI3. The DRI3 implementation details are outlined in this article.

Keith Packard has outlined his FD passing adventures on his blog. Next on his agenda for updating the Direct Rendering Infrastructure is creating a simple FD passing extension that works for passing descriptors back and forth to the X Server. Once that is done, the rest of "DRI-Next" should come together in a straightforward manner.

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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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