Jake Writer 8f9ff07b48 fix(virtdisplay): atomically claim X11 display via Xvfb -displayfd (#597) ...

Replace the userspace lock-file scan + random-jitter retry loop with
Xvfb's own -displayfd mechanism. Xvfb scans up from :0 and atomically
binds the first free X11 socket (kernel-mediated, no userspace race),
then writes the chosen display number back through an inherited pipe.

This eliminates the duplicate-display race that occurred when many
camoufox processes started concurrently and all observed the same set
of free display numbers before any of them bound.

Adds a 10s read timeout on the displayfd pipe so a hung Xvfb fails
fast instead of blocking forever, and adds tests covering single
launch, idempotent get(), 50 concurrent reservations with uniqueness,
and post-kill display reuse.

2026-05-08 19:12:09 -04:00

..

test_virtdisplay.py

fix(virtdisplay): atomically claim X11 display via Xvfb -displayfd (#597)

2026-05-08 19:12:09 -04:00