#! /bin/sh

set -e

win=no

## xscreensaver
if xscreensaver-command -version >/dev/null 2>&1; then
  xscreensaver-command -lock
  win=yes
fi

## gnome-screensaver
if gnome-screensaver-command --query >/dev/null 2>&1; then
  gnome-screensaver-command --lock
  win=yes
fi

## Make sure we did something useful.
case $win in
  no)
    echo >&2 "$0: no screensaver found"
    exit 1
    ;;
esac