+ identifier. The returned string needs to be
+ freed with the libc
+ <citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ call after use.</para>
+
+ <para><function>sd_session_get_tty()</function>
+ may be used to determine the TTY device of the
+ session identified by the specified session
+ identifier. The returned string needs to be