How to find out a window's process ID?

Josep Febrer jfebrer at
Mon Dec 8 17:24:16 GMT 2003

A Divendres 28 Novembre 2003 07:47, TK va escriure:
> There are tools to do it on other platforms, but I don't how to do it in
> KDE, or should I say in XFree86?

To know the PID from the active window you can try something like this:

window=`xprop -root | grep '_NET_ACTIVE_WINDOW(WINDOW)' | awk '{print $5;}'`
pid=`xprop -id $window | grep NET_WM_PID | awk '{print $3;}'`

Ara bien; y cogerás trigo. 

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