Game bring-up: RuneScape Launcher (PPSA99225): past sendmsg with #7090; first-start Wine prefix setup stops

[milescoviello]

Status: on main, it aborts in sendmsg: control data is not supported, like Forever Launcher (#7090). With #7090, its private wineserver starts, and Wine runs and shuts down in order. It then stops on its own first-start prefix setup ("Setting up the Windows files did not finish"), and Wine exits with 0.

Setup (p3n1cillin's run, reported in #7090)

• Title: RuneScape Launcher (PPSA99225 01.000.021)
• Ubuntu on WSL2, GCC 15.2.0, Release, llvmpipe on Xvfb, 120 s without input

Not possible on Windows: Wine needs 0x7ffe0000, which the host process already owns there.

Pull requests from this title

• feat(libkernel): pass descriptors in SCM_RIGHTS messages on Unix sockets #7090: SCM_RIGHTS control messages pass descriptors on guest Unix-domain sockets.

Open

• The first-start prefix setup after the sendmsg stop, not investigated yet.

AI-assisted: yes (Claude Code)