screensaver

#!/bin/bash

xset s 300 5

have_command() {
  test -x "$(command -v "$1")"
}

maybe_xfce4_screensaver() {
  local init_command="xfce4-screensaver"
  local lock_command="xfce4-screensaver-command"
  have_command "$init_command" || return 1
  have_command "$lock_command" || return 1
  case $1 in
    init)
      (setsid "$init_command"&)
      # TODO: is this needed?
      (xss-lock -l -- "$lock_command" --lock&)
      ;;
    lock)
      exec "$lock_command" --lock
      ;;
  esac
}

maybe_xsecurelock() {
  local init_command="xsecurelock"
  local lock_command="xsecurelock"
  have_command "$init_command" || return 1
  if test -f "$HOME/.xsecurelockrc"; then
      . "$HOME/.xsecurelockrc"
  fi
  case $1 in
    init)
      (xss-lock -l -- "$init_command"&)
      ;;
    lock)
      exec "$lock_command"
      ;;
  esac
}

maybe_xscreensaver() {
  local init_command="xscreensaver"
  local lock_command="xscreensaver-command"
  have_command "$init_command" || return 1
  have_command "$lock_command" || return 1
  case $1 in
    init)
      (setsid "$init_command"&)
      (xss-lock -- "$lock_command" --lock&)
      ;;
    lock)
      exec "$lock_command" --lock
      ;;
  esac
}

maybe_xsecurelock "$@" || maybe_xscreensaver "$@" || maybe_xfce4_screensaver "$@" || exit 1