Need help retrieving dbus interface info from GDBusInterface object

["Sills, Daniel Joseph" <sillsd@xxxxxxxxxxxxxxxxxxxx>]

Hi,

I instantiated a GDBusObjectManager that gets information from a dbus service, particularly the "org.bluez" service. I can retrieve the objects using g_dbus_object_manager_get_objects() and I can retrieve the interfaces using g_dbus_object_get_interfaces(), but using g_dbus_interface_get_info() always returns NULL and my program segfaults when trying to retrieve the name. I think I am missing something or doing something wrong.

I attached my source code in this email. The problem occurs at line 24.

Any help and feedback is appreciated.

Thanks,

-Daniel J. Sills

#include <gio/gio.h>
#include <stdio.h>
#include <stdlib.h>

static void
print_objects(GDBusObjectManager *manager)
{
    GList *objects;
    GList *l;

    g_print("Object manager at %s\n", g_dbus_object_manager_get_object_path(manager));
    objects = g_dbus_object_manager_get_objects(manager);
    for (l = objects; l != NULL; l = l->next)
    {
        GDBusObject *object = l->data;
        GList *interfaces;
        GList *ll;
        g_print(" - Object at %s\n", g_dbus_object_get_object_path(G_DBUS_OBJECT(object)));

        interfaces = g_dbus_object_get_interfaces(G_DBUS_OBJECT(object));
        for (ll = interfaces; ll != NULL; ll = ll->next)
        {
            GDBusInterface *interface = G_DBUS_INTERFACE(ll->data);
            g_print("   - Interface %s\n", g_dbus_interface_get_info(interface)->name); // <--- NULL POINTER EXCEPTION HERE
        }
        g_list_free_full(interfaces, g_object_unref);
    }
    g_list_free_full(objects, g_object_unref);
}

int main(int argc, char** argv)
{   
    GDBusObjectManager *manager;
    GError *error;
    gchar *name_owner;

    manager = NULL;
    error = NULL;
    name_owner = NULL;

    manager = g_dbus_object_manager_client_new_for_bus_sync(G_BUS_TYPE_SYSTEM, G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_NONE, "org.bluez", "/", NULL, NULL, NULL, NULL, &error);

    if (manager == NULL)
    {
        g_printerr("Error getting object manager client: %s", error->message);
        g_error_free(error);
        return (EXIT_FAILURE);
    }

    name_owner = g_dbus_object_manager_client_get_name_owner(G_DBUS_OBJECT_MANAGER_CLIENT(manager));
    g_print("name-owner: %s\n", name_owner);
    g_free(name_owner);

    print_objects(manager);

    g_object_unref(manager);

    return (EXIT_SUCCESS);
}

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