From 312a2ba0eb8ab19646517aeaa785475d3fbcfd51 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Thu, 6 Dec 2012 14:32:55 +0100
Subject: [PATCH] blkdebug: Allow usage without config file
As soon as new rules can be set during runtime, as introduced by the
next patch, blkdebug makes sense even without a config file.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/blkdebug.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/block/blkdebug.c b/block/blkdebug.c
index d61ece86a9..c9041ec3d2 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -240,6 +240,11 @@ static int read_config(BDRVBlkdebugState *s, const char *filename)
int ret;
struct add_rule_data d;
+ /* Allow usage without config file */
+ if (!*filename) {
+ return 0;
+ }
+
f = fopen(filename, "r");
if (f == NULL) {
return -errno;