[Qemu-devel] [PATCH] qemu: jaso-parser: Output the content of invalid keyword

[Amos Kong <akong@redhat.com>]

When input some invialid word 'unknowcmd' through QMP port, qemu outputs this
error message:
"parse error: invalid keyword `%s'"
This patch makes qemu output the content of invalid keyword, like:
"parse error: invalid keyword `unknowcmd'"

Signed-off-by: Amos Kong <akong@redhat.com>
---
 json-parser.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/json-parser.c b/json-parser.c
index 579928f..b55d763 100644
--- a/json-parser.c
+++ b/json-parser.c
@@ -12,6 +12,7 @@
  */
 
 #include <stdbool.h>
+#include <stdarg.h>
 
 #include "qemu-common.h"
 #include "qstring.h"
@@ -93,7 +94,12 @@ static int token_is_escape(QObject *obj, const char *value)
  */
 static void parse_error(JSONParserContext *ctxt, QObject *token, const char *msg, ...)
 {
-    fprintf(stderr, "parse error: %s\n", msg);
+    va_list ap;
+    va_start(ap, msg);
+    fprintf(stderr, "parse error: ");
+    vfprintf(stderr, msg, ap);
+    fprintf(stderr, "\n");
+    va_end(ap);
 }
 
 /**
-- 
1.6.3.3