#! /bin/sh

if [[ `uname -s` = 'Darwin' ]] ; then
	/System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine
	exit
fi

KDE_LOCK='kdesktop_lock --forcelock || krunner_lock --forcelock || /usr/libexec/kde4/krunner_lock --forcelock || /usr/lib/kde4/libexec/krunner_lock --forcelock'
GNOME_LOCK='gnome-screensaver-command --lock'
XSCREEN_LOCK='xscreensaver-command -lock || xlock'

if ( ps -e | grep gdm >/dev/null 2>/dev/null ) ; then
	# looks like Gnome. They probably want gnome-screensaver.
	# start gnome-screensaver to ensure it's running
	gnome-screensaver >/dev/null 2>/dev/null
	eval $GNOME_LOCK 2>/dev/null && exit
elif ( ps -e | grep kdm >/dev/null 2>/dev/null ) ; then
	# looks like some version of KDE. They probably want kde's screensaver.
	eval $KDE_LOCK 2>/dev/null && exit
elif ( ps -e | grep xdm >/dev/null 2>/dev/null ) ; then
	xscreensaver & >/dev/null 2>/dev/null
	eval $XSCREEN_LOCK 2>/dev/null && exit
fi

echo Could not decide what desktop manager you are using.
echo Trying fallback locking.
eval $KDE_LOCK 2>/dev/null && exit
gnome-screensaver >/dev/null 2>/dev/null
eval $GNOME_LOCK 2>/dev/null
xscreensaver & >/dev/null 2>/dev/null
eval $XSCREEN_LOCK 2>/dev/null && exit

echo Could not lock your screen.
exit 1