rrdfetch: Print a usage summary if not enough parameters have been given. -- Sebastia...

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@1926 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/src/rrd_fetch.c b/src/rrd_fetch.c
index 2c30a98..b60ea15 100644 (file)
--- a/src/rrd_fetch.c
+++ b/src/rrd_fetch.c
@@ -163,7 +163,7 @@ int rrd_fetch(
     *step = step_tmp;
 
     if (optind + 1 >= argc) {
-        rrd_set_error("not enough arguments");
+        rrd_set_error("Usage: rrdtool %s <file> <CF> [options]", argv[0]);
         return -1;
     }