- <function>sd_session_get_service()</function> and
- <function>sd_session_get_seat()</function> return 0 or
+ <function>sd_session_get_seat()</function>,
+ <function>sd_session_get_service()</function>,
+ <function>sd_session_get_type()</function>,
+ <function>sd_session_get_class()</function> and
+ <function>sd_session_get_display()</function> return 0 or