#!/bin/bash## usage: sudo who.sh## Requires root permissions to both query who has the device open,# and to read the mappings of likely root-owned processes#for i in`lsof -t /dev/dri/card0`;do
who=`readlink /proc/$i/exe`
count=`grep /dev/dri/card0 /proc/$i/maps | wc -l | cut -f1 -d\ `echo"$who[$i]:$count"done