1 files changed, 12 insertions, 1 deletions

diff --git a/inc/rrdtool.class.php b/inc/rrdtool.class.php
index 7dcbc2a..f7907ec 100644
--- a/inc/rrdtool.class.php
+++ b/inc/rrdtool.class.php
@@ -1,9 +1,20 @@
 <?php
 
 class RRDTool {
+        var $rrdtool = '/usr/bin/rrdtool';
+
+        function __construct($rrdtool) {
+                if (file_exists($rrdtool)) {
+                        $this->rrdtool = $rrdtool;
+                } else {
+                        printf('<p class="warn">Error: RRDTool (<em>%s</em>) is not executable. Please install RRDTool it and configure <em>$CONFIG[\'rrdtool\'].</em></p>', $rrdtool);
+                        die();
+                }
+        }
+
         function rrd_info($rrdfile) {
                 if (file_exists($rrdfile)) {
-                        $raw_info = shell_exec('/usr/bin/rrdtool info '.$rrdfile);
+                        $raw_info = shell_exec($this->rrdtool.' info '.$rrdfile);
                         $raw_array = explode("\n", $raw_info);
                         foreach ($raw_array as $key => $info) {
                                 if ($info != "") {