PERSISTENT_AUTH_SOCK=$VARDIR/ssh/persistent-ssh-auth.sock

if [ ! -S "$PERSISTENT_AUTH_SOCK" ] && [ -S "$SSH_AUTH_SOCK" ]; then
  ln -sf "$SSH_AUTH_SOCK" "$PERSISTENT_AUTH_SOCK"
fi

if [ -n "${DISPLAY:-}" ]; then
  read proto cookie
  if [ "${DISPLAY%%:*}" = localhost ]; then
    # X11UseLocalhost=yes
    echo add unix:$(echo $DISPLAY | cut -c11-) $proto $cookie
  else
    # X11UseLocalhost=no
    echo add $DISPLAY $proto $cookie
  fi | xauth -q -
fi