Forces X11 programs that are preloaded with this library to include _NET_WM_PID
Run make to build the .so files, it will build a 32-bit version and a 64-bit version
Or run sudo make install to install them into /usr/lib32 and /usr/lib64 respectively
You can also uninstall them with sudo make uninstall
To use this, use LD_PRELOAD=/usr/lib32/forcepid32.so or LD_PRELOAD=/usr/lib64/forcepid.so depending on the program you wish to get a _NET_WM_PID for.
Original code found here: https://www.mail-archive.com/devel@xfree86.org/msg05806.html Found on: https://stackoverflow.com/questions/1131277/how-to-convert-a-x11-window-id-to-a-process-id