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

diff --git a/man/sd_get_seats.xml b/man/sd_get_seats.xml
index 28d06e9843ca34f8be07b3d8e50982df83b75f1d..17adcef745295dbcd7f92f5382cdf465bebac0fb 100644 (file)
--- a/man/sd_get_seats.xml
+++ b/man/sd_get_seats.xml
@@ -89,6 +89,8 @@
 
                 <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>