Re:Wayland vs. X – Overview
by hedora on Wednesday December 20, 2023 @10:19AM
(#38709599)
You certainly can build sandboxing atop X11. If you're reading using a web browser on a Linux desktop (or in a VM on a Linux desktop), then you're literally staring at an existence proof.
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I guess the point is it can't be sandboxed by directly exposing X protocol messages to the sandboxed app. Although your sibling comment by gpderetta makes an excellent point. I guess they're saying no one wants to sandbox the X protocol, and breaking compatibility, proponents would claim, lets you design a sandbox friendly protocol from scratch.