From cd494f4cefb36faa9e4fa343050a30201d4bdebd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20Lindstr=C3=B6m?= <jan.lindstrom@mariadb.com>
Date: Wed, 5 Apr 2017 08:54:20 +0300
Subject: fix warning "ignoring return value" of fwrite.

Merge pull request https://github.com/MariaDB/server/pull/343

contributed by Eric Herman.
---
 sql/wsrep_binlog.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'sql/wsrep_binlog.cc')

diff --git a/sql/wsrep_binlog.cc b/sql/wsrep_binlog.cc
index d3f59cee5f2..b6aee3a74ab 100644
--- a/sql/wsrep_binlog.cc
+++ b/sql/wsrep_binlog.cc
@@ -329,9 +329,13 @@ void wsrep_dump_rbr_buf(THD *thd, const void* rbr_buf, size_t buf_len)
   }
 
   FILE *of= fopen(filename, "wb");
+
   if (of)
   {
-    fwrite (rbr_buf, buf_len, 1, of);
+    if (fwrite(rbr_buf, buf_len, 1, of) == 0)
+       WSREP_ERROR("Failed to write buffer of length %llu to '%s'",
+                   (unsigned long long)buf_len, filename);
+
     fclose(of);
   }
   else
-- 
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