#!/bin/sh
#
# Control script grant/revoke access to X for the ATI External Events Daemon
#
# Distro maintainers may modify this reference script as necessary to conform
# to their distribution policies.
#
# Copyright (c) 2006, ATI Technologies Inc. All rights reserved.
#
#
# Parameters:
# $1 is a keyword, either "grant" or "revoke"
# $2 is the display name
# $3 is the X authorization file to be authorized
#
# Returns:
# 0 if authorization was successfully granted/revoked
# nonzero on failure
#
# Note:
# The third parameter only makes sense if xauth is being used. If another
# mechanism such as xhost is being used it can be ignored. For setups that
# do not do any form of authentication(!) this script can be trimmed down
# to just "exit 0" and the daemon will assume that it is always authorized.
#
GetServerAuthFile()
{
# Determine where the authorization key may be hiding. The location will
# vary depending upon whether X was started via xdm/kdm, gdm or startx, so
# check each one in turn.
# Check xorg 7
XDM_AUTH_MASK=/var/run/xauth/A$1*
XDM_AUTH_FILE=`ls -t $XDM_AUTH_MASK 2>/dev/null | head -n 1` # Choose the newest file
if [ -n "$XDM_AUTH_FILE" ]; then
SERVER_AUTH_FILE=$XDM_AUTH_FILE
DISP_SEARCH_STRING="#ffff#"
return 0
fi
# Check xdm/kdm
XDM_AUTH_MASK=/var/lib/xdm/authdir/authfiles/A$1*
XDM_AUTH_FILE=`ls -t $XDM_AUTH_MASK 2>/dev/null | head -n 1` # Choose the newest file
if [ -n "$XDM_AUTH_FILE" ]; then
SERVER_AUTH_FILE=$XDM_AUTH_FILE
DISP_SEARCH_STRING="#ffff#"
return 0
fi
# Check gdm
GDM_AUTH_FILE=/var/lib/gdm/$1.Xauth
if [ -e $GDM_AUTH_FILE ]; then
SERVER_AUTH_FILE=$GDM_AUTH_FILE
DISP_SEARCH_STRING="$1"
return 0
fi
# Finally, check for startx
for XPID in `pidof X`; do
TRIAL_XAUTH_FILE=`tr '\0' '\n' < /proc/$XPID/environ | grep -e "^XAUTHORITY=" | cut -d= -f2`
TRIAL_XAUTH_KEY=`xauth -f $TRIAL_XAUTH_FILE list | grep "unix$1"`
if [ -n "$TRIAL_XAUTH_KEY" ]; then
SERVER_AUTH_FILE=$TRIAL_XAUTH_FILE
DISP_SEARCH_STRING="unix$1"
return 0
fi
done
# Couldn't find the key
return -1
}
# Main part of script
#
# Since the daemon is usually started during init time before X comes up,
# $PATH may not yet contain the paths to the X binaries, particularly xauth.
# Add the usual location for where xauth may live and fail out if we still
# can't find it.
#
PATH=$PATH:/usr/bin:/usr/X11R6/bin
which xauth > /dev/null || exit -1
case "$1" in
grant)
GetServerAuthFile $2 || exit -1
DISP_AUTH_KEY=`xauth -f $SERVER_AUTH_FILE list | grep $DISP_SEARCH_STRING | awk '{ print $3 }'`
if [ -n "$DISP_AUTH_KEY" ]; then
xauth -f $3 add $2 . $DISP_AUTH_KEY || exit -1
else
exit -1
fi
;;
revoke)
xauth -f $3 remove $2 || exit -1
;;
*)
exit -1
;;
esac
exit 0