X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=doc%2Frrdlast.pod;h=ecec65a949df966f8b416259ec4bf0548249e0bc;hb=5bf8f29cfab14076fab38ac26a98fc4993a23b7e;hp=44492369110b8f7f29d9ac892e414157bfeebae0;hpb=d50afc217aaec57e418a55bbe2d20fe996c6e026;p=rrdtool.git

diff --git a/doc/rrdlast.pod b/doc/rrdlast.pod
index 4449236..ecec65a 100644
--- a/doc/rrdlast.pod
+++ b/doc/rrdlast.pod
@@ -2,16 +2,15 @@
 
 rrdlast - Return the date of the last data sample in an RRD
 
-=for html <div align="right"><a href="rrdlast.pdf">PDF</a> version.</div>
-
 =head1 SYNOPSIS
 
 B<rrdtool> B<last> I<filename>
+S<[B<--daemon> I<address>]>
 
 =head1 DESCRIPTION
 
-The B<last> function returns the UNIX timestamp when the RRD was last
-updated.
+The B<last> function returns the UNIX timestamp of the most recent
+update of the RRD.
 
 =over 8
 
@@ -19,6 +18,32 @@ updated.
 
 The name of the B<RRD> that contains the data.
 
+=item B<--daemon> I<address>
+
+Address of the L<rrdcached> daemon. If specified, a C<flush> command is sent
+to the server before reading the RRD files. This allows B<rrdtool> to return
+fresh data even if the daemon is configured to cache values for a long time. To
+specify a UNIX domain socket use the prefix C<unix:>, see example below. Other
+addresses are interpreted as normal network addresses, i.E<nbsp>e. IPv4 or IPv6
+addresses in most cases.
+
+ rrdtool last --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd
+
+=back
+
+=head1 ENVIRONMENT VARIABLES
+
+The following environment variables may be used to change the behavior of
+C<rrdtoolE<nbsp>last>:
+
+=over 4
+
+=item B<RRDCACHED_ADDRESS>
+
+If this environment variable is set it will have the same effect as specifying
+the C<--daemon> option on the command line. If both are present, the command
+line argument takes precedence.
+
 =back
 
 =head1 AUTHOR