On 12/8/25 16:16, Alyssa Ross wrote:

Xwayland only accepts connections from the user it's running as. It is started by wayland-proxy-virtwl, which does not allow passing extra options, so we can't change its authentication method.

Therefore, the only way for X11 to work with the current software is to run wayland-proxy-virtwl as the same user as the application.

I expect that in the near future, we will use xwayland-satellite instead of the built-in Xwayland translation in wayland-proxy-virtwl. When that happens, we can run the stub compositor as its own user again.

Fixes: cb27e3a ("img/app: wayland-proxy-virtwl: run as non-root") Signed-off-by: Alyssa Ross <hi@alyssa.is> --- img/app/image/etc/group | 1 - img/app/image/etc/mdev.conf | 2 +- img/app/image/etc/passwd | 1 - img/app/image/etc/s6-rc/wayland-proxy-virtwl/run | 2 +- 4 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/img/app/image/etc/group b/img/app/image/etc/group index b2c3a2e..e84da60 100644 --- a/img/app/image/etc/group +++ b/img/app/image/etc/group @@ -1,4 +1,3 @@ -wayland:x:1:wayland wireplumber:x:2:wireplumber pipewire:x:3:pipewire user:x:1000:user diff --git a/img/app/image/etc/mdev.conf b/img/app/image/etc/mdev.conf index d4cd825..33a07d6 100644 --- a/img/app/image/etc/mdev.conf +++ b/img/app/image/etc/mdev.conf @@ -4,7 +4,7 @@ -$MODALIAS=.* 0:0 0 ! +importas -Siu MODALIAS modprobe -q $MODALIAS $INTERFACE=.* 0:0 0 ! +/etc/mdev/iface $MODALIAS=virtio:d0000001Av.* 0:0 0 ! +/etc/mdev/virtiofs -dri/card0 wayland:wayland 660 +background { /etc/mdev/listen card0 } +dri/card0 user:user 660 +background { /etc/mdev/listen card0 }

-SUBSYSTEM=sound;.* pipewire:pipewire 660 snd/controlC0 pipewire:pipewire 660 +background { /etc/mdev/listen controlC0 } diff --git a/img/app/image/etc/passwd b/img/app/image/etc/passwd index 08324b0..425908e 100644 --- a/img/app/image/etc/passwd +++ b/img/app/image/etc/passwd @@ -1,5 +1,4 @@ root:x:0:0:System administrator:/run/root:/bin/sh -wayland:x:1:1:wayland-proxy-virtwl service user:/:/usr/bin/nologin wireplumber:x:2:2:WirePlumber service user:/:/usr/bin/nologin pipewire:x:3:3:PipeWire service user:/:/usr/bin/nologin user:x:1000:1000:Spectrum application user:/home/user:/bin/sh diff --git a/img/app/image/etc/s6-rc/wayland-proxy-virtwl/run b/img/app/image/etc/s6-rc/wayland-proxy-virtwl/run index 86d7f63..5d06b7a 100755 --- a/img/app/image/etc/s6-rc/wayland-proxy-virtwl/run +++ b/img/app/image/etc/s6-rc/wayland-proxy-virtwl/run @@ -26,6 +26,6 @@ export LISTEN_FDS 2 export LISTEN_FDNAMES wayland:x11 getpid LISTEN_PID

-s6-setuidgid wayland +s6-setuidgid user

wayland-proxy-virtwl --virtio-gpu --x-display=0

base-commit: 5104fa720ce8b00612c5487fc47124fbf99e58c6

Might as well also make /tmp/.X11-unix and friends only accessible by "user". -- Sincerely, Demi Marie Obenour (she/her/hers)