[LTP] [PATCH] testscripts/networkstress.sh: update for two interfaces support

[Hangbin Liu <liuhangbin@gmail.com>]

As some networking tests need two interfaces at the same time. Use grep -P to
get two interfaces' mac addresses.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
 testscripts/networkstress.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/testscripts/networkstress.sh b/testscripts/networkstress.sh
index b40af72..499b40c 100755
--- a/testscripts/networkstress.sh
+++ b/testscripts/networkstress.sh
@@ -15,6 +15,8 @@ fi
 export TMPDIR=/tmp/netst-$$
 mkdir $TMPDIR
 VERBOSE="no"
+# Default interface is "eth0".
+# For some test cases that need two interfaces, give parameter like "eth0|eth1"
 INTERFACE="eth0"
 
 #===========================================================================
@@ -71,6 +73,7 @@ usage () {
     echo " -W|w: Run whole network stress tests"
     echo " -D|d: Test duration (default ${NS_DURATION} sec)"
     echo " -N|n: Select the network interface (default: $INTERFACE)"
+    echo "       Two interfaces' format: \"eth0|eth1\""
     echo " -V|v: Enable verbose"
     echo " -H|h: This Usage"
     echo ""
@@ -102,7 +105,7 @@ if [ -z ${TEST_CASE} ]; then
 	usage
 fi
 
-export LHOST_HWADDRS=`ifconfig | grep ${INTERFACE} | grep HWaddr |awk '{print $5}'`
+export LHOST_HWADDRS=`ifconfig | grep -P ${INTERFACE} | grep HWaddr |awk '{print $5}'`
 
 if [ -z ${RHOST} ]; then
 	## Just a silly check
-- 
1.8.1.4


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