#!/bin/bash
# ConsoleKit script to grant/revoke access to particular devices.
# Author: Jim Carter <jimc@math.ucla.edu>, UCLA-Mathnet

# The devices currently giving us trouble are the nVidia and ATI direct
# rendering interfaces.  These fail to create any sysfs data, and hence
# HAL does not recognize them as video devices for which the console user
# should get permission.  

# Warning, this script contains bash-isms.  Debian rules require that scripts
# run on any shell.  

if [ "$CK_SESSION_X11_DISPLAY" != ":0" ] ; then exit 0 ; fi
reason="$1"

case "$reason" in
    session_added )	luser=$CK_SESSION_USER_UID ; ;;
    session_removed )	luser=root ; ;;
    * )			exit 0 ; ;;
esac
if [ -z "$luser" ] ; then 
    logger -p daemon.error "$0: CK_SESSION_USER_UID env variable was not set"
    exit 4
fi

shopt -s nullglob
devs=`echo /dev/nvidia* /dev/dri/*`
if [ -z "$devs" ] ; then exit 0 ; fi

logger -p daemon.error "$0: chown $luser $devs"
chown $luser $devs