[Qemu-devel] [PATCH v4 03/22] tests/libqtest: Clean up how we read the QMP greeting

[Eric Blake <eblake@redhat.com>]

From: Markus Armbruster <armbru@redhat.com>

qtest_init() still uses the qtest_qmp_discard_response(s, "") hack to
receive the greeting, even though we have qtest_qmp_receive() since
commit 66e0c7b.  Put it to use.

Bonus: gets rid of an empty format string.  A step towards
compile-time format string checking without triggering
-Wformat-zero-length.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1500645206-13559-9-git-send-email-armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>

---
v4: hoist earlier in series
---
 tests/libqtest.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/libqtest.c b/tests/libqtest.c
index 4a5492a603..7e5425d704 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -230,9 +230,11 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
 QTestState *qtest_init(const char *extra_args)
 {
     QTestState *s = qtest_init_without_qmp_handshake(extra_args);
+    QDict *greeting;

     /* Read the QMP greeting and then do the handshake */
-    qtest_qmp_discard_response(s, "");
+    greeting = qtest_qmp_receive(s);
+    QDECREF(greeting);
     qtest_qmp_discard_response(s, "{ 'execute': 'qmp_capabilities' }");

     return s;
-- 
2.13.3