Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 vl.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/vl.c b/vl.c
index 5ba06adf78..8a5fd0c81f 100644
--- a/vl.c
+++ b/vl.c
@@ -2731,6 +2731,19 @@ static int machine_set_property(void *opaque,
  */
 static bool object_create_initial(const char *type)
 {
+    if (is_help_option(type)) {
+        GSList *l, *list;
+
+        error_printf("List of user creatable objects:\n");
+        list = object_class_get_list_sorted(TYPE_USER_CREATABLE, false);
+        for (l = list; l != NULL; l = l->next) {
+            ObjectClass *oc = OBJECT_CLASS(l->data);
+            error_printf("%s\n", object_class_get_name(oc));
+        }
+        g_slist_free(list);
+        exit(0);
+    }
+
     if (g_str_equal(type, "rng-egd") ||
         g_str_has_prefix(type, "pr-manager-")) {
         return false;
-- 
2.19.0.rc1

On 09/06/2018 10:12 AM, Marc-André Lureau wrote:

In the subject, s/\?/help/

> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>   vl.c | 13 +++++++++++++
>   1 file changed, 13 insertions(+)
> 
> diff --git a/vl.c b/vl.c
> index 5ba06adf78..8a5fd0c81f 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2731,6 +2731,19 @@ static int machine_set_property(void *opaque,
>    */
>   static bool object_create_initial(const char *type)
>   {
> +    if (is_help_option(type)) {
> +        GSList *l, *list;
> +
> +        error_printf("List of user creatable objects:\n");
> +        list = object_class_get_list_sorted(TYPE_USER_CREATABLE, false);
> +        for (l = list; l != NULL; l = l->next) {
> +            ObjectClass *oc = OBJECT_CLASS(l->data);
> +            error_printf("%s\n", object_class_get_name(oc));

This prints to stderr,

> +        }
> +        g_slist_free(list);
> +        exit(0);

then exits with status 0.  I'd much rather successful help text be 
printed to stdout.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
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