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Could someone please point me to a place(PDF) where I can find the detail description about the Xserver(Xorg) e.g DIX Layer, OS Layer etc.
Specifically I am looking for how to get the complete list of all the active clients from inside the Xserver(Xorg). How does Xorg maintain this list? Whenever a new request arrives to Xorg, after accepting the connection where does it put information about that client?
Thanks
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Xorg provides an interface between your hardware and the graphical software you want to run. Besides that, Xorg is also fully network-aware, meaning you are able to run an application on one system while viewing it on a different one.
If you want to check whether x11 is installed, run dpkg -l | grep xorg . If you want to check if x11 is currently running (if logged in) then run echo $XDG_SESSION_TYPE .
10.1 Starting the X environment The first is to start X manually when you feel like using it. To do so, log in to one of the text consoles, and type startx . This will start X and switch you to its virtual console. The second (and recommended) way to use X is with xdm , or X Display Manager.
Run xlsclients.
http://cgit.freedesktop.org/xorg/app/xlsclients
Documentation about Xorg internals:
Still, reading the source code is usually the best way, since the documentation about Xserver internals is not updated regularly.
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