From a83602e84aa317e98db3bc1684438d120fe2d650 Mon Sep 17 00:00:00 2001
From: Renato Botelho <renato@netgate.com>
Date: Mon, 6 Jul 2015 13:51:45 -0300
Subject: [PATCH] Make sure temporary config file is safe on disk before
 rename, ticket #4803

---
 etc/inc/config.lib.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/etc/inc/config.lib.inc b/etc/inc/config.lib.inc
index dedb3accb2..ad9300e900 100644
--- a/etc/inc/config.lib.inc
+++ b/etc/inc/config.lib.inc
@@ -486,7 +486,7 @@ function safe_write_file($file, $content, $force_binary) {
 	fflush($fd);
 	fclose($fd);
 
-	if (!rename($tmp_file, $file)) {
+	if (!pfSense_fsync($tmp_file) || !rename($tmp_file, $file)) {
 		// Unable to move temporary file to original
 		@unlink($tmp_file);
 		return false;