# 关于 Weston 的一些配置

Error running systemd as user - Failed to connect to bus: $DBUS_SESSION_BUS_ADDRESS and $XDG_RUNTIME_DIR not defined

```md
The quick solution

Assuming someuser uses bash as their login shell, add the following exports to ~someuser/.profile [1]:

export XDG_RUNTIME_DIR="/run/user/$UID"
export DBUS_SESSION_BUS_ADDRESS="unix:path=${XDG_RUNTIME_DIR}/bus"

Then, a user with root/sudo privileges can interact with someuser's systemd by wrapping the command with runuser:

sudo runuser someuser -l -c "systemctl --user enable ipfs"
sudo runuser someuser -l -c "systemctl --user start ipfs"

runuser someuser -l -c "printenv" can help to troubleshoot these and other exported environment variables.
```

```bash
apt install weston
/etc/xdg/weston/weston.ini
```

```bash
[core]
xwayland=true
backend=drm-backend.so

[keyboard]
keymap_layout=gb

[output]
name=DSI-1
mode=1024x600

[launcher]
icon=/usr/share/icons/locolor/32x32/apps/gvim.png
path=/usr/bin/weston-terminal

[autolaunch]
path=/usr/bin/weston-terminal
```

```weston.ini
backend=headless-backend.so
    overrides defaults backend. Available backend modules in the /usr/lib/x86_64-linux-
    gnu/weston directory are:
        drm-backend.so
        fbdev-backend.so
        headless-backend.so
        rdp-backend.so
        rpi-backend.so
        wayland-backend.so
        x11-backend.so
```

output name 对应 /sys/class/drm 下的视频输出节点。

```bash
sudo -E XDG_RUNTIME_DIR="/run/user/1000" weston-launch --tty=/dev/tty2 --user=cat

usermod -aG video user123
usermod -a -G weston-launch user-name

gst-play-1.0 Big_Buck_Bunny_720_10s_30MB.mp4 --videosink=waylandsink0

apt-get install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgstreamer-plugins-bad1.0-dev gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools gstreamer1.0-x gstreamer1.0-alsa gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-qt5 gstreamer1.0-pulseaudio
```

<https://wayland.pages.freedesktop.org/weston/toc/running-weston.html#running-weston-on-a-different-seat-on-a-stand-alone-back-end>