LXR qemu/util/dbus.c

   1/*
   2 * Helpers for using D-Bus
   3 *
   4 * Copyright (C) 2019 Red Hat, Inc.
   5 *
   6 * This work is licensed under the terms of the GNU GPL, version 2.  See
   7 * the COPYING file in the top-level directory.
   8 */
   9
  10#include "qemu/osdep.h"
  11#include "qemu/dbus.h"
  12#include "qemu/error-report.h"
  13#include "qapi/error.h"
  14
  15/*
  16 * qemu_dbus_get_queued_owners() - return the list of queued unique names
  17 * @connection: A GDBusConnection
  18 * @name: a service name
  19 *
  20 * Return: a GStrv of unique names, or NULL on failure.
  21 */
  22GStrv
  23qemu_dbus_get_queued_owners(GDBusConnection *connection, const char *name,
  24                            Error **errp)
  25{
  26    g_autoptr(GDBusProxy) proxy = NULL;
  27    g_autoptr(GVariant) result = NULL;
  28    g_autoptr(GVariant) child = NULL;
  29    g_autoptr(GError) err = NULL;
  30
  31    proxy = g_dbus_proxy_new_sync(connection, G_DBUS_PROXY_FLAGS_NONE, NULL,
  32                                  "org.freedesktop.DBus",
  33                                  "/org/freedesktop/DBus",
  34                                  "org.freedesktop.DBus",
  35                                  NULL, &err);
  36    if (!proxy) {
  37        error_setg(errp, "Failed to create DBus proxy: %s", err->message);
  38        return NULL;
  39    }
  40
  41    result = g_dbus_proxy_call_sync(proxy, "ListQueuedOwners",
  42                                    g_variant_new("(s)", name),
  43                                    G_DBUS_CALL_FLAGS_NO_AUTO_START,
  44                                    -1, NULL, &err);
  45    if (!result) {
  46        if (g_error_matches(err,
  47                            G_DBUS_ERROR,
  48                            G_DBUS_ERROR_NAME_HAS_NO_OWNER)) {
  49            return g_new0(char *, 1);
  50        }
  51        error_setg(errp, "Failed to call ListQueuedOwners: %s", err->message);
  52        return NULL;
  53    }
  54
  55    child = g_variant_get_child_value(result, 0);
  56    return g_variant_dup_strv(child, NULL);
  57}
  58