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>
qemu · Dec 12, 2012 · 312a2ba · 312a2ba
1 parent b83c18e
commit 312a2ba
Showing 1 changed file with 5 additions and 0 deletions.
diff --git 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;