[29/43] blkdebug: Allow usage without config file

Submitted by Kevin Wolf on Dec. 13, 2012, 3:10 p.m.

Details

Message ID 1355411450-12761-30-git-send-email-kwolf@redhat.com
State New
Headers show

Commit Message

Kevin Wolf Dec. 13, 2012, 3:10 p.m.
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 files changed, 5 insertions(+), 0 deletions(-)

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diff --git a/block/blkdebug.c b/block/blkdebug.c
index d61ece8..c9041ec 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;