'G(S?P?L?M?)'::
Active flags of the focused node of a focused desktop.
-Configuration file
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-Its default path is '$XDG_CONFIG_HOME/bspwm/bspwmrc'.
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-An argument is passed to this script: the run level, a number which indicates whether it was launched after a restart (cf. 'wm -r') or not.
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Environment Variables
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