From a263ef283e422fc25e7ecff2e9c272eab1a336a6 Mon Sep 17 00:00:00 2001
From: Davanum Srinivas <dims@linux.vnet.ibm.com>
Date: Mon, 28 Jan 2013 21:56:02 -0500
Subject: [PATCH] Pick just the first route when looking for the host interface

The current code will fail miserably if multiple default routes are
present (perfectly normal if they have different metrics). Fixing
the code to pick the first/top entry

Fixes LP# 1084470

Change-Id: Ieda16b575685071ff831c92e6b2a29737d6f849b
---
 stack.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stack.sh b/stack.sh
index 005d88e7b6..27096670f9 100755
--- a/stack.sh
+++ b/stack.sh
@@ -253,7 +253,7 @@ FIXED_NETWORK_SIZE=${FIXED_NETWORK_SIZE:-256}
 NETWORK_GATEWAY=${NETWORK_GATEWAY:-10.0.0.1}
 
 # Find the interface used for the default route
-HOST_IP_IFACE=${HOST_IP_IFACE:-$(ip route | sed -n '/^default/{ s/.*dev \(\w\+\)\s\+.*/\1/; p; }')}
+HOST_IP_IFACE=${HOST_IP_IFACE:-$(ip route | sed -n '/^default/{ s/.*dev \(\w\+\)\s\+.*/\1/; p; }' | head -1)}
 # Search for an IP unless an explicit is set by ``HOST_IP`` environment variable
 if [ -z "$HOST_IP" -o "$HOST_IP" == "dhcp" ]; then
     HOST_IP=""