#!/bin/bash 

#
# Control script for ACPI lid state and AC adapter state
#

getXuser() {
        user=`finger| grep -m1 ":$displaynum " | awk '{print $1}'`
        if [ x"$user" = x"" ]; then
                user=`finger| grep -m1 ":$displaynum" | awk '{print $1}'`
        fi
        if [ x"$user" != x"" ]; then
                userhome=`getent passwd $user | cut -d: -f6`
                export XAUTHORITY=$userhome/.Xauthority
        else
                export XAUTHORITY=""
        fi
}


grep -q closed /proc/acpi/button/lid/*/state
if [ $? = 0 ]; then
 lid_closed=1
 echo "Lid Closed"
else
 lid_closed=0
 echo "Lid Open"
fi

grep -q off-line /proc/acpi/ac_adapter/*/state 

if [ $? = 0 ]; then
   echo "On DC"
   on_dc=1
else
   echo "On AC"
   on_dc=0
fi



if [ ${lid_closed} -eq 1 -o ${on_dc} -eq 1 ]; then
    echo "Low power"
    for x in /tmp/.X11-unix/*; do
	displaynum=`echo $x | sed s#/tmp/.X11-unix/X##`
	getXuser;
	if [ x"$XAUTHORITY" != x"" ]; then
	    export DISPLAY=":$displaynum"	    
	    su $user -c "/usr/bin/aticonfig --set-powerstate=1 "
	fi
    done
else
    echo "high power"
    for x in /tmp/.X11-unix/*; do
	displaynum=`echo $x | sed s#/tmp/.X11-unix/X##`
	getXuser;
	if [ x"$XAUTHORITY" != x"" ]; then
	    export DISPLAY=":$displaynum"
	    newlevel=$(aticonfig --lsp | grep ":" | tail -1 | cut -d':' -f 1 | sed -e "s/\*//g" -e "s/ *//g")
	    [ -z "$newlevel" ] && newlevel=3
	    su $user -c "/usr/bin/aticonfig --set-powerstate=$newlevel "
	fi
    done
fi