# Merge xauth cookies into home stash.
if [ -n "$XAUTHORITY" ]; then
  if [ -r "$XAUTHORITY" ]; then
    # If we are root the old file may have been chowned.
    [ -n "$SUDO_UID" -a -O "$XAUTHORITY" ] && chown "$SUDO_UID" "$XAUTHORITY"
    [ -n "$SUDO_GID" -a -G "$XAUTHORITY" ] && chgrp "$SUDO_GID" "$XAUTHORITY"

    # Merge and unset.
    exec 3<&0 < "$XAUTHORITY"
    unset XAUTHORITY
    xauth merge - 2>/dev/null
    exec <&3 3<&-
  else
    # We can't read the file so just unset.
    unset XAUTHORITY
  fi
fi