trap 'kill `cat ovs-openflowd.pid`' 0
AT_CAPTURE_FILE([ovs-openflowd.log])
AT_CHECK(
- [ovs-openflowd --detach --pidfile --enable-dummy --log-file dummy@br0 none --datapath-id=fedcba9876543210 $1],
+ [ovs-openflowd --detach --pidfile --enable-dummy --log-file --fail=closed dummy@br0 none --datapath-id=fedcba9876543210 $1],
[0], [], [stderr])
AT_CHECK([[sed < stderr '
/vlog|INFO|opened log file/d