man: include lastlog file caveat (#313)

man/lastlog.8.xml: add another point to the caveats section regarding
the handling of the lastlog file by external tools.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=951564

diff --git a/man/lastlog.8.xml b/man/lastlog.8.xml
index fc096c8f912bee615e204a3ba527ffab06177296..7e68282fb6ef3c50bb6ea3466cb4145b6abd9619 100644 (file)
--- a/man/lastlog.8.xml
+++ b/man/lastlog.8.xml
@@ -233,5 +233,12 @@
       is no entries for users with UID between 170 and 800 lastlog will appear
       to hang as it processes entries with UIDs 171-799).
     </para>
+    <para>
+      Having high UIDs can create problems when handling the <term><filename>
+      /var/log/lastlog</filename></term> with external tools. Although the
+      actual file is sparse and does not use too much space, certain
+      applications are not designed to identify sparse files by default and may
+      require a specific option to handle them.
+    </para>
   </refsect1>
 </refentry>