man: clarify the order of seats in sd_get_seats() is undefined

[elogind.git] / man / sd_get_seats.xml

diff --git a/man/sd_get_seats.xml b/man/sd_get_seats.xml
index bbc396a09b3601d7ae0aa636149cd81d5d2cec9c..17adcef745295dbcd7f92f5382cdf465bebac0fb 100644 (file)
--- a/man/sd_get_seats.xml
+++ b/man/sd_get_seats.xml
@@ -8,16 +8,16 @@
   Copyright 2010 Lennart Poettering
 
   systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU General Public License as published by
-  the Free Software Foundation; either version 2 of the License, or
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.
 
   systemd is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  General Public License for more details.
+  Lesser General Public License for more details.
 
-  You should have received a copy of the GNU General Public License
+  You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 -->
 
@@ -76,17 +76,21 @@
 
                 <para><function>sd_get_seats()</function> may be used
                 to determine all currently available local
-                seats. Returns an array of seat identifiers. The
-                returned array and all strings it references need to
-                be freed with the libc
+                seats. Returns a NULL terminated array of seat
+                identifiers. The returned array and all strings it
+                references need to be freed with the libc
                 <citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
-                call after use.</para>
+                call after use. Note that instead of an empty array
+                NULL may be returned and should be considered
+                equivalent to an empty array.</para>
 
                 <para>Similar, <function>sd_get_sessions()</function> may
                 be used to determine all current login sessions.</para>
 
                 <para>Similar, <function>sd_get_uids()</function> may
                 be used to determine all Unix users who currently have login sessions.</para>
+
+                <para>Note that the returned lists are not sorted and in an undefined order.</para>
         </refsect1>
 
         <refsect1>
@@ -117,8 +121,8 @@
 
                 <para>
                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
-                        <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
-                        <citerefentry><refentrytitle>sd_session_get_seat</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>sd_session_get_seat</refentrytitle><manvolnum>3</manvolnum></citerefentry>
                 </para>
         </refsect1>