appropriate use of XDG_RUNTIME_DIR=/run/user/1000?

[0nobody0]

have been trying to replicate the configuration for the wayvnc service on a raspberry pi 5, when running wayvnc directly - Linux pi5 6.6.31+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.31-1+rpt1 (2024-05-29) aarch64 GNU/Linux

the idea was to have the wayvnc service run as normal on startup. then after isolating the LAN to a network namespace (per https://www.wireguard.com/netns/) stopping the service and starting a new wayvnc process in the LAN namespace.

using the following script, modeled on /usr/sbin/wayvnc-run.sh was causing issues like ERROR: Failed to execute command: attach: Failed to connect to WAYLAND_DISPLAY="wayland-1" (even without namespaces):

export XDG_RUNTIME_DIR=/tmp/wayvnc
mkdir -p "$XDG_RUNTIME_DIR"

export XKB_DEFAULT_MODEL="$XKBMODEL"
export XKB_DEFAULT_LAYOUT="$XKBLAYOUT"

wayvnc --render-cursor \
--detached \
--config /etc/wayvnc/config \
--socket /tmp/wayvnc/wayvncctl.sock

running wayvnc --render-cursor 0.0.0.0 worked fine as the default user, however trying to run as root or in a script returned the same issue mentioned above. eventually isolated the issue to XDG_RUNTIME_DIR and now have this working:

mkdir -p /tmp/wayvnc
export XDG_RUNTIME_DIR=/run/user/1000
WAYLAND_DISPLAY=wayland-1 wayvnc --render-cursor --config=/etc/wayvnc/config --socket /tmp/wayvnc/wayvncctl.sock

does this seem like an acceptable solution? also curious how the service finds WAYLAND_DISPLAY with XDG_RUNTIME_DIR=/tmp/wayvnc set? possibly related to https://github.com/any1/rpi-wayvnc-control?

thanks for your work