main () {
    #include <stdio.h>
    #include <unistd.h>
    setuid( 0 );
    //printf( "C Program\n" );
    system ( "/var/www/lock/lock.sh" );
}


lock.sh:
#/usr/kde/3.5/bin/dcop --user emmelin kdesktop KScreensaverIface lock
XAUTHORITY="/home/emmelin/.Xauthority" DISPLAY=":0" /usr/bin/qdbus org.kde.screensaver /ScreenSaver Lock
XAUTHORITY="/home/emmelin/.Xauthority" DISPLAY=":0" /usr/bin/xset dpms force off