SBUS: Add an async request to retrieve the caller ID

Adds an async request sbus_get_sender_id_{send,recv} that allows
retrieval of UID based on "sender" as returned by
dbus_message_get_sender().

The UID is an int64_t to be able to use "-1" to as a fallback value for
uknown or error cases.

The unit test is added as a standalone one, not part of the sbus_tests
because the request, and by extension the unit test relies on being
connected to the system bus, which is very unlikely to work in a build
system.

Reviewed-by: Pavel Březina <pbrezina@redhat.com>
Reviewed-by: Stef Walter <stefw@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/sbus/sssd_dbus.h b/src/sbus/sssd_dbus.h
index 8ba108ee3..15ca52118 100644
--- a/src/sbus/sssd_dbus.h
+++ b/src/sbus/sssd_dbus.h
@@ -27,6 +27,7 @@ struct sbus_interface;
 struct sbus_request;
 
 #include <dbus/dbus.h>
+#include <sys/types.h>
 #include "util/util.h"
 
 typedef int (*sbus_msg_handler_fn)(struct sbus_request *dbus_req,
@@ -187,6 +188,7 @@ void sbus_conn_send_reply(struct sbus_connection *conn,
  * or sbus_request_fail() functions.
  */
 struct sbus_request {
+    int64_t client;
     struct sbus_connection *conn;
     DBusMessage *message;
     struct sbus_interface *intf;