[Qemu-devel] [PATCH 16/20] migration-test: Make wait_command() cope with '%'

[Markus Armbruster <armbru@redhat.com>]

wait_command() passes its argument @command to qtest_qmp_send().
Falls apart if @command contain '%'.  Two ways to disarm this trap:
suppress interpretation of '%' by passing @command as argument to
format string "%s", or fix it by having wait_command() take the
variable arguments to go with @command.  Do the latter.

This is another step towards compile-time format string checking
without triggering -Wformat-nonliteral.

Cc: Juan Quintela <quintela@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 tests/migration-test.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tests/migration-test.c b/tests/migration-test.c
index 267342fd3e..55f9d006ec 100644
--- a/tests/migration-test.c
+++ b/tests/migration-test.c
@@ -156,9 +156,15 @@ static void stop_cb(void *opaque, const char *name, QDict *data)
 /*
  * Events can get in the way of responses we are actually waiting for.
  */
-static QDict *wait_command(QTestState *who, const char *command)
+GCC_FMT_ATTR(2, 3)
+static QDict *wait_command(QTestState *who, const char *command, ...)
 {
-    qtest_qmp_send(who, command);
+    va_list ap;
+
+    va_start(ap, command);
+    qtest_qmp_vsend(who, command, ap);
+    va_end(ap);
+
     return qtest_qmp_receive_success(who, stop_cb, NULL);
 }
 
-- 
2.17.1