File sleep_button of Package acpid

#!/bin/bash
#
# Sleep button suspend script, adapted from 
# /usr/lib/acpid/power_button
#
# Copyright (C) 2008 Holger Macht <hmacht@suse.de>
#
# This file is released under the GPLv2.
#

EXEC=/usr/sbin/pm-suspend

# iterate over all sessions. If a active X session is found, do nothing
while read A; do
    SESSION=`echo $A | sed 's/\(Session[0-9]*\)://g'`
    [ -z "$SESSION" ] || continue

    SESSION=`echo $A | sed 's/\(Session[0-9]*\):/\1/g'`
    IS_X=`dbus-send --system --print-reply --dest=org.freedesktop.ConsoleKit \
	/org/freedesktop/ConsoleKit/$SESSION \
	org.freedesktop.ConsoleKit.Session.GetX11Display`

    # check if this is a X session, if not, go on
    DISP=`echo $IS_X | sed -e 's/^.* string "\(.*\)"/\1/'`
    [ -n "$DISP" ] || continue

    IS_ACTIVE=`dbus-send --system --print-reply --dest=org.freedesktop.ConsoleKit \
        /org/freedesktop/ConsoleKit/$SESSION \
        org.freedesktop.ConsoleKit.Session.IsActive`
    IS_ACTIVE=`echo $IS_ACTIVE | sed -e 's/^.* boolean \(.*\)$/\1/'`

    if [ "$IS_ACTIVE" = "true" -a -n "$DISP" ]; then
	# additional check, if none of these two apps are running, go on
	if [ -n "`pidof kpowersave`" -o -n "`pidof gnome-power-manager`" -o -n "`pidof kded4`" -o -n "`pidof dalston-power-applet`" -o -n "`pidof gnome-settings-daemon`" ]; then
	    echo doing nothing...
	    exit 0
	fi
    fi
done < <(ck-list-sessions)   

logger -s "Sleep Button event received, running $EXEC."
$EXEC