a816218637
Waybar SEGVs in Glib::DispatchNotifier::pipe_io_handler when the MPRIS module is enabled. The crash is intermittent because it requires a race between signal emission and object destruction: a playerctl GLib signal callback (e.g. onPlayerPlay) calls dp.emit(), which writes a pointer to the Dispatcher into an internal pipe. If the Mpris object is destroyed before the GLib main loop reads that pipe entry, pipe_io_handler dereferences a dangling pointer. This typically occurs when a media player appears or vanishes on D-Bus (browser closing, player quitting) or during waybar shutdown/config reload. The root cause is that ~Mpris() calls g_object_unref() on the manager and player GObjects without first disconnecting the signal handlers that hold raw `this` pointers. If playerctl holds additional references to these GObjects, they survive the unref and can still fire signals targeting the already-destroyed Mpris instance. Adopt the same cleanup pattern used by the Wireplumber module: call g_signal_handlers_disconnect_by_data() to sever all signal connections referencing `this` before releasing the GObjects with g_clear_object(). This guarantees no callbacks can enqueue stale Dispatcher notifications after teardown begins. Additionally: - Clean up old player in onPlayerNameAppeared before replacing it, fixing a GObject leak and accumulation of dangling signal connections - Remove duplicate onPlayerStop signal registration (copy-paste bug)
Waybar 
Highly customizable Wayland bar for Sway and Wlroots based compositors.
Available in all major distributions
Waybar examples
Current features
- Sway (Workspaces, Binding mode, Focused window name)
- River (Mapping mode, Tags, Focused window name)
- Hyprland (Window Icons, Workspaces, Focused window name)
- Niri (Workspaces, Focused window name, Language)
- DWL (Tags, Focused window name) requires dwl ipc patch
- Tray #21
- Local time
- Battery
- UPower
- Power profiles daemon
- Network
- Bluetooth
- Pulseaudio
- Privacy Info
- Wireplumber
- Disk
- Memory
- Cpu load average
- Temperature
- MPD
- Custom scripts
- Custom image
- Multiple output configuration
- And many more customizations
Configuration and Styling
See the wiki for more details.
Installation
Waybar is available from a number of Linux distributions:
An Ubuntu PPA with more recent versions is available here.
Building from source
$ git clone https://github.com/Alexays/Waybar
$ cd Waybar
$ meson setup build
$ ninja -C build
$ ./build/waybar
# If you want to install it
$ ninja -C build install
$ waybar
Dependencies
gtkmm3
jsoncpp
libsigc++
fmt
wayland
chrono-date
spdlog
libgtk-3-dev [gtk-layer-shell]
gobject-introspection [gtk-layer-shell]
libgirepository1.0-dev [gtk-layer-shell]
libpulse [Pulseaudio module]
libnl [Network module]
libappindicator-gtk3 [Tray module]
libdbusmenu-gtk3 [Tray module]
libmpdclient [MPD module]
libsndio [sndio module]
libevdev [KeyboardState module]
xkbregistry
upower [UPower battery module]
Build dependencies
cmake
meson
scdoc
wayland-protocols
On Ubuntu, you can install all the relevant dependencies using this command (tested with 19.10 and 20.04):
sudo apt install \
clang-tidy \
gobject-introspection \
libdbusmenu-gtk3-dev \
libevdev-dev \
libfmt-dev \
libgirepository1.0-dev \
libgtk-3-dev \
libgtkmm-3.0-dev \
libinput-dev \
libjsoncpp-dev \
libmpdclient-dev \
libnl-3-dev \
libnl-genl-3-dev \
libpulse-dev \
libsigc++-2.0-dev \
libspdlog-dev \
libwayland-dev \
scdoc \
upower \
libxkbregistry-dev
On Arch, you can use this command:
pacman -S --asdeps \
gtkmm3 \
jsoncpp \
libsigc++ \
fmt \
wayland \
chrono-date \
spdlog \
gtk3 \
gobject-introspection \
libgirepository \
libpulse \
libnl \
libappindicator-gtk3 \
libdbusmenu-gtk3 \
libmpdclient \
sndio \
libevdev \
libxkbcommon \
upower \
meson \
cmake \
scdoc \
wayland-protocols \
glib2-devel
Contributions welcome!
Have fun :)
The style guidelines are Google's
Caution
Distributions of Waybar are only released on the official GitHub page.
Waybar does not have an official website. Do not trust any sites that claim to be official.
License
Waybar is licensed under the MIT license. See LICENSE for more information.