[PATCH net-next 5/5] selftest: netdevsim: suppress socat warnings

["Íñigo Huguet" <ihuguet@riseup.net>]

When executing the peer.sh selftest, socat emits these 2 warnings:
  socat[116839] W address is opened in read-write mode but only supports read-only
  socat[116833] W exiting on signal 15

The first one is because socat tries to open in read-write mode by
default, but STDIN can only be opened in read mode. Fix it by adding the
-u option (unidirectional left-to-right).

The second is because 'kill' is used to terminate the first socat process.
Suppress this warning by redirecting its stderr to /dev/null

Signed-off-by: Íñigo Huguet <ihuguet@riseup.net>
---
 tools/testing/selftests/drivers/net/netdevsim/peer.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/drivers/net/netdevsim/peer.sh b/tools/testing/selftests/drivers/net/netdevsim/peer.sh
index ec96015bc9eb..183a130c6e4b 100755
--- a/tools/testing/selftests/drivers/net/netdevsim/peer.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/peer.sh
@@ -210,13 +210,13 @@ assert_carrier_up nscl "$NSIM_DEV_2_NAME"
 # send/recv packets
 
 tmp_file=$(mktemp)
-ip netns exec nssv socat TCP-LISTEN:1234,fork $tmp_file &
+ip netns exec nssv socat TCP-LISTEN:1234,fork $tmp_file 2>/dev/null &
 pid=$!
 res=0
 
 wait_local_port_listen nssv 1234 tcp
 
-echo "HI" | ip netns exec nscl socat STDIN TCP:192.168.1.1:1234
+echo "HI" | ip netns exec nscl socat -u STDIN TCP:192.168.1.1:1234
 
 count=$(cat $tmp_file | wc -c)
 if [[ $count -ne 3 ]]; then
-- 
2.53.0