[lnst] PacketCapture: Suppress tcpdump's error output

[Jiří Pírko]

commit c5ede57453548b0ec39d233ebc76e671185ea3d0
Author: Radek Pazdera <rpazdera(a)redhat.com&gt;
Date:   Fri Nov 23 16:03:35 2012 +0100

    PacketCapture: Suppress tcpdump's error output
    
    Signed-off-by: Radek Pazdera <rpazdera(a)redhat.com&gt;

 lnst/Common/PacketCapture.py |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/lnst/Common/PacketCapture.py b/lnst/Common/PacketCapture.py
index 8cfad17..69ad5cb 100644
--- a/lnst/Common/PacketCapture.py
+++ b/lnst/Common/PacketCapture.py
@@ -50,8 +50,8 @@ class PacketCapture:
         output_file = self._file
         pcap_filter = self._filter
 
-        self._cmd = "tcpdump -p -i %s -w %s \"%s\"" % (interface,
output_file,
-                                                        pcap_filter)
+        self._cmd = "tcpdump -p -i %s -w %s \"%s\" 2>/dev/null" %
\
+                            (interface, output_file, pcap_filter)
 
     def _execute_tcpdump(self):
         """ Start tcpdump in the background """