From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Mon, 6 Apr 2009 14:08:16 +0000 (+0000)
Subject: lets have an error message when creating the graph fails
X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=commitdiff_plain;h=b1deabf87933e51ec589619aefcfb4ab34aeea32

lets have an error message when creating the graph fails


git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@1768 a5681a0c-68f1-0310-ab6d-d61299d08faa
---

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index eb90952..549e08c 100644
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -3844,8 +3844,11 @@ int rrd_graph(
             (*prdata)[prlines] = NULL;
             strcpy((*prdata)[prlines - 1], walker->value.u_str);
         } else if (strcmp(walker->key, "image") == 0) {
-            fwrite(walker->value.u_blo.ptr, walker->value.u_blo.size, 1,
-                   (stream ? stream : stdout));
+            if ( fwrite(walker->value.u_blo.ptr, walker->value.u_blo.size, 1,
+                   (stream ? stream : stdout)) == 0 && ferror(stream ? stream : stdout)){
+                rrd_set_error("writing image");
+                return 0;
+            }
         }
         /* skip anything else */
         walker = walker->next;