path: lxsession_0.5.6-3/lxlock/lxlock
if pidof light-locker >/dev/null; then
    light-locker-command -l >/dev/null 2>&1
elif pidof xscreensaver >/dev/null; then
    xscreensaver-command -lock >/dev/null 2>&1
elif pidof gnome-screensaver >/dev/null; then