[Qemu-devel] [PATCH 1/2] net: truncate output file when using dump backend

["Hervé Poussineau" <hpoussin@reactos.org>]

This prevents data of a previous run to be seen in the new dump file.

Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
---
 net/dump.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/dump.c b/net/dump.c
index 0d0cbb2..8132411 100644
--- a/net/dump.c
+++ b/net/dump.c
@@ -106,7 +106,7 @@ static int net_dump_init(VLANState *vlan, const char *device,
     DumpState *s;
     int fd;
 
-    fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
+    fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY | O_BINARY, 0644);
     if (fd < 0) {
         error_report("-net dump: can't open %s", filename);
         return -1;
-- 
1.7.6.3