[Qemu-devel] [PATCH 8/9] vl: add -query-capabilities

[Anthony Liguori <aliguori@us.ibm.com>]

This dumps the results of query-version, query-commands, and
query-config-capabilities into a single JSON object on stdout.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 qemu-options.hx |    4 ++++
 vl.c            |   27 +++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/qemu-options.hx b/qemu-options.hx
index 584dc76..4d760d8 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -2710,6 +2710,10 @@ the @var{simple} tracing backend.
 @end table
 ETEXI
 
+DEF("query-capabilities", 0, QEMU_OPTION_query_capabilities,
+    "-query-capabilities  print QEMU capabilities and exit\n",
+    QEMU_ARCH_ALL)
+
 HXCOMM This is the last statement. Insert new options before this line!
 STEXI
 @end table
diff --git a/vl.c b/vl.c
index 5337e58..88626aa 100644
--- a/vl.c
+++ b/vl.c
@@ -2265,6 +2265,29 @@ int qemu_init_main_loop(void)
     return main_loop_init();
 }
 
+static void qemu_print_capabilities(void)
+{
+    QObject *version, *commands, *config;
+    QDict *dict;
+    QString *json;
+
+    qmp_marshal_input_query_version(NULL, NULL, &version);
+    qmp_marshal_input_query_commands(NULL, NULL, &commands);
+    qmp_marshal_input_query_config_capabilities(NULL, NULL, &config);
+
+    dict = qdict_new();
+    qdict_put_obj(dict, "version", version);
+    qdict_put_obj(dict, "commands", commands);
+    qdict_put_obj(dict, "config", config);
+
+    json = qobject_to_json_pretty(QOBJECT(dict));
+
+    printf("%s\n", qstring_get_str(json));
+
+    QDECREF(json);
+    QDECREF(dict);
+}
+
 typedef struct QemuOptions
 {
     QEMUMachine *machine;
@@ -3123,6 +3146,10 @@ static void qemu_parse_option(int index, const char *optarg, QemuOptions *option
             fclose(fp);
             break;
         }
+    case QEMU_OPTION_query_capabilities:
+        qemu_print_capabilities();
+        exit(0);
+        break;
     default:
         os_parse_cmd_args(index, optarg);
     }
-- 
1.7.5.4