It should redirect stdout to /dev/null first, then redirect stderr to whatever stdout currently points at.
Signed-off-by: Wei Jiangang <weijg.f...@cn.fujitsu.com> --- tests/qemu-iotests/083 | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tests/qemu-iotests/083 b/tests/qemu-iotests/083 index aa99278..7d368b5 100755 --- a/tests/qemu-iotests/083 +++ b/tests/qemu-iotests/083 @@ -44,7 +44,7 @@ choose_tcp_port() { wait_for_tcp_port() { while ! (netstat --tcp --listening --numeric | \ - grep "$1.*0\\.0\\.0\\.0:\\*.*LISTEN") 2>&1 >/dev/null; do + grep "$1.*0\\.0\\.0\\.0:\\*.*LISTEN") >/dev/null 2>&1; do sleep 0.1 done } @@ -71,7 +71,7 @@ EOF nbd_url="nbd:127.0.0.1:$port:exportname=foo" fi - $PYTHON nbd-fault-injector.py $extra_args "127.0.0.1:$port" "$TEST_DIR/nbd-fault-injector.conf" 2>&1 >/dev/null & + $PYTHON nbd-fault-injector.py $extra_args "127.0.0.1:$port" "$TEST_DIR/nbd-fault-injector.conf" >/dev/null 2>&1 & wait_for_tcp_port "127\\.0\\.0\\.1:$port" $QEMU_IO -c "read 0 512" "$nbd_url" 2>&1 | _filter_qemu_io | _filter_nbd -- 1.9.3