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17d66e5603
...with the same approach as rcxml.c - `If` actions now works for menus - `name` argument no longer have to be the first argument of <action> - `label` argument no longer have to be the first argument of <item>
148 lines
4.9 KiB
Markdown
148 lines
4.9 KiB
Markdown
labwc(1)
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# NAME
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labwc - a Wayland stacking compositor
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# SYNOPSIS
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*labwc* [options...]
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# DESCRIPTION
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Labwc is a wlroots-based stacking compositor for wayland.
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It is light-weight and independent with a focus on simply stacking windows
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well and rendering some window decorations. Where practicable it uses clients
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for wall-paper, panels, screenshots and so on.
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# SIGNALS
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The compositor will exit or reload its configuration upon receiving SIGTERM
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and SIGHUP respectively. For example:
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```
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kill -s <signal> $LABWC_PID
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killall -s <signal> labwc
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```
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Each running instance of labwc sets the environment variable `LABWC_PID` to
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its PID. This is useful for sending signals to a specific instance and is what
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the `--exit` and `--reconfigure` options use.
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# OPTIONS
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*-c, --config* <config-file>
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Specify a config file with path
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*-C, --config-dir* <config-directory>
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Specify a config directory
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*-d, --debug*
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Enable full logging, including debug information. See *ENVIRONMENT
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VARIABLES* section below for further options.
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*-e, --exit*
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Exit the compositor by sending SIGTERM to `$LABWC_PID`
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*-h, --help*
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Show help message and quit
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*-m, --merge-config*
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Merge user config/theme files in all XDG Base Directories
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*-r, --reconfigure*
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Reload the compositor configuration by sending SIGHUP to `$LABWC_PID`
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*-s, --startup* <command>
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Run command on startup
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*-S, --session* <command>
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Run command on startup and terminate compositor on exit. This is useful
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for session management as it allows the session client to terminate
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labwc by exiting itself. This is a Wayland specific use-case because
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under X, xinit starts the server and keeps it alive for as long as the
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session client. Thus either the session client starts the Window
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Manager, or the Window Manager can be launched independently first. On
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Wayland, the Compositor is both Display Server and Window Manager, so
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the described session management mechanisms do not work because the
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Compositor needs to be running before the session can function. As some
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session clients support both X11 and Wayland, this command line option
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avoids re-writes and fragmentation.
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*-v, --version*
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Show the version number and quit
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*-V, --verbose*
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Enable more verbose logging
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# SESSION MANAGEMENT
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To enable the use of graphical clients launched via D-Bus or systemd service
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activation, labwc can update both activation environments on launch. Provided
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that labwc is aware of an active D-Bus user session (*i.e.*, the environment
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variable `DBUS_SESSION_BUS_ADDRESS` is defined), the compositor will invoke the
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commands
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```
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dbus-update-activation-environment
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systemctl --user import-environment
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```
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(when available) to notify D-Bus and systemd with the values of the following
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environment variables:
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```
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WAYLAND_DISPLAY
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DISPLAY
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XDG_CURRENT_DESKTOP
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XDG_SESSION_TYPE
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XCURSOR_SIZE
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XCURSOR_THEME
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LABWC_PID
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```
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This behavior is enabled by default whenever labwc uses the "DRM" wlroots
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backend (which implies that labwc is the primary compositor on the console).
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When other backends are employed (for example, when labwc runs nested in another
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Wayland compositor or an X11 server), updates to the activation environment are
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disabled by default. Updates to the activation environment can be forced by
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setting the environment variable `LABWC_UPDATE_ACTIVATION_ENV` to one of the
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truthy values `1`, `true`, `yes` or `on`; or suppressed by setting the variable
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to one of the falsy values `0`, `false`, `no` or `off`.
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Whenever labwc updates the activation environment on launch, it will also
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attempt to clear the activation environment on exit. For D-Bus, which does not
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provide a means for properly un-setting variables in the activation environment,
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this is accomplished by setting the session variables to empty strings. For
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systemd, the command `systemctl --user unset-environment` will be invoked to
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actually remove the variables from the activation environment.
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# ENVIRONMENT VARIABLES
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Set the environment variables listed below to enable specific debug options.
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This can be done in either the *environment* file or on the command line, for
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example: *LABWC_DEBUG_FOO=1 labwc*.
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*LABWC_DEBUG_LIBSFDO*
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Enable debug and info logging for libsfdo, for example for parsing of
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.desktop files and searching for icons. Note that libsfdo error logging
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is always enabled regardless of this environment variable but will only
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be shown with the *-V|--version* option.
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*LABWC_DEBUG_DIR_CONFIG_AND_THEME*
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Increase logging of paths for config files (for example rc.xml,
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autostart, environment and menu.xml) as well as titlebar buttons.
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*LABWC_DEBUG_CONFIG_NODENAMES*
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Enable logging of all nodenames (for example *policy.placement: Cascade*
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for *<placement><policy>Cascade</policy></placement>*) for config and
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menu files respectively.
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*LABWC_DEBUG_KEY_STATE*
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Enable logging of press and release events for bound keys (generally
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key-combinations like *Ctrl-Alt-t*)
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# SEE ALSO
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labwc-actions(5), labwc-config(5), labwc-menu(5), labwc-theme(5)
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