Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
MAINTAINERS | 2 ++
include/qemu/dbus.h | 18 +++++++++++++++
util/Makefile.objs | 3 +++
util/dbus.c | 55 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 78 insertions(+)
create mode 100644 include/qemu/dbus.h
create mode 100644 util/dbus.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 219a76f0a1..dccea79d48 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2160,6 +2160,8 @@ F: qapi/migration.json
D-Bus
M: Marc-André Lureau <marcandre.lur...@redhat.com>
S: Maintained
+F: util/dbus.c
+F: include/qemu/dbus.h
F: docs/interop/dbus.rst
Seccomp
diff --git a/include/qemu/dbus.h b/include/qemu/dbus.h
new file mode 100644
index 0000000000..efd74bef96
--- /dev/null
+++ b/include/qemu/dbus.h
@@ -0,0 +1,18 @@
+/*
+ * Helpers for using D-Bus
+ *
+ * Copyright (C) 2019 Red Hat, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ */
+
+#ifndef DBUS_H
+#define DBUS_H
+
+#include <gio/gio.h>
+
+GStrv qemu_dbus_get_queued_owners(GDBusConnection *connection,
+ const char *name);
+
+#endif /* DBUS_H */
diff --git a/util/Makefile.objs b/util/Makefile.objs
index 41bf59d127..f435cfbd64 100644
--- a/util/Makefile.objs
+++ b/util/Makefile.objs
@@ -54,5 +54,8 @@ util-obj-$(CONFIG_INOTIFY1) += filemonitor-inotify.o
util-obj-$(CONFIG_LINUX) += vfio-helpers.o
util-obj-$(CONFIG_POSIX) += drm.o
util-obj-y += guest-random.o
+util-obj-$(CONFIG_GIO) += dbus.o
+dbus.o-cflags = $(GIO_CFLAGS)
+dbus.o-libs = $(GIO_LIBS)
stub-obj-y += filemonitor-stub.o
diff --git a/util/dbus.c b/util/dbus.c
new file mode 100644
index 0000000000..bb51870e54
--- /dev/null
+++ b/util/dbus.c
@@ -0,0 +1,55 @@
+/*
+ * Helpers for using D-Bus
+ *
+ * Copyright (C) 2019 Red Hat, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/dbus.h"
+#include "qemu/error-report.h"
+
+/*
+ * qemu_dbus_get_queued_owners() - return the list of queued unique names
+ * @connection: A GDBusConnection
+ * @name: a service name
+ *
+ * Return: a GStrv of unique names, or NULL on failure.
+ */
+GStrv
+qemu_dbus_get_queued_owners(GDBusConnection *connection, const char *name)
+{
+ g_autoptr(GDBusProxy) proxy = NULL;
+ g_autoptr(GVariant) result = NULL;
+ g_autoptr(GVariant) child = NULL;
+ g_autoptr(GError) err = NULL;
+
+ proxy = g_dbus_proxy_new_sync(connection, G_DBUS_PROXY_FLAGS_NONE, NULL,
+ "org.freedesktop.DBus",
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ NULL, &err);
+ if (!proxy) {
+ error_report("Failed to create DBus proxy: %s", err->message);
+ return NULL;
+ }
+
+ result = g_dbus_proxy_call_sync(proxy, "ListQueuedOwners",
+ g_variant_new("(s)", name),
+ G_DBUS_CALL_FLAGS_NO_AUTO_START,
+ -1, NULL, &err);
+ if (!result) {
+ if (g_error_matches(err,
+ G_DBUS_ERROR,
+ G_DBUS_ERROR_NAME_HAS_NO_OWNER)) {
+ return g_new0(char *, 1);
+ }
+ error_report("Failed to call ListQueuedOwners: %s", err->message);
+ return NULL;
+ }
+
+ child = g_variant_get_child_value(result, 0);
+ return g_variant_dup_strv(child, NULL);
+}
--
2.23.0
