[Qemu-block] [PULL 4/9] iotests: Use qemu-nbd's --pid-file

[Eric Blake]

From: Max Reitz <mre...@redhat.com>

Signed-off-by: Max Reitz <mre...@redhat.com>
Message-Id: <20190508211820.17851-5-mre...@redhat.com>
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
 tests/qemu-iotests/common.rc | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index 93f87389b60e..5502c3da2f87 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -105,10 +105,8 @@ _qemu_io_wrapper()

 _qemu_nbd_wrapper()
 {
-    (
-        echo $BASHPID > "${QEMU_TEST_DIR}/qemu-nbd.pid"
-        exec "$QEMU_NBD_PROG" $QEMU_NBD_OPTIONS "$@"
-    )
+    "$QEMU_NBD_PROG" --pid-file="${QEMU_TEST_DIR}/qemu-nbd.pid" \
+                     $QEMU_NBD_OPTIONS "$@"
 }

 _qemu_vxhs_wrapper()
-- 
2.20.1