[PATCH 1/3] dbus: Default empty signature for method return messages
by Andrew Zaborowski
Allow Dbus method or setter handlers to return the result of a
l_dbus_message_new_method_return call directly without calling
l_dbus_message_set_arguments on the result. This will result in an
empty signature message being built inside l_dbus_send.
Note l_dbus_send now modifies the message being passed to it.
Instead of checking if the signature returned by
l_dbus_message_get_signature is NULL we could also just call
l_dbus_message_builder_new and write an empty message.
l_dbus_message_builder_new would return NULL if message->sealed was
true.
---
ell/dbus.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/ell/dbus.c b/ell/dbus.c
index 5318794..ddc51aa 100644
--- a/ell/dbus.c
+++ b/ell/dbus.c
@@ -324,6 +324,11 @@ static uint32_t send_message(struct l_dbus *dbus, bool priority,
return 0;
}
+ /* Default empty signature for method return messages */
+ if (type == DBUS_MESSAGE_TYPE_METHOD_RETURN &&
+ !l_dbus_message_get_signature(message))
+ l_dbus_message_set_arguments(message, "");
+
callback = l_new(struct message_callback, 1);
callback->serial = dbus->next_serial++;
--
2.9.3
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