core: convert PID 1 to libsystemd-bus

This patch converts PID 1 to libsystemd-bus and thus drops the
dependency on libdbus. The only remaining code using libdbus is a test
case that validates our bus marshalling against libdbus' marshalling,
and this dependency can be turned off.

This patch also adds a couple of things to libsystem-bus, that are
necessary to make the port work:

- Synthesizing of "Disconnected" messages when bus connections are
  severed.

- Support for attaching multiple vtables for the same interface on the
  same path.

This patch also fixes the SetDefaultTarget() and GetDefaultTarget() bus
calls which used an inappropriate signature.

As a side effect we will now generate PropertiesChanged messages which
carry property contents, rather than just invalidation information.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/core/transaction.h b/src/core/transaction.h
index b6ee237ef8..d949b21b8d 100644
--- a/src/core/transaction.h
+++ b/src/core/transaction.h
@@ -48,7 +48,7 @@ int transaction_add_job_and_dependencies(
                 bool conflicts,
                 bool ignore_requirements,
                 bool ignore_order,
-                DBusError *e);
-int transaction_activate(Transaction *tr, Manager *m, JobMode mode, DBusError *e);
+                sd_bus_error *e);
+int transaction_activate(Transaction *tr, Manager *m, JobMode mode, sd_bus_error *e);
 int transaction_add_isolate_jobs(Transaction *tr, Manager *m);
 void transaction_abort(Transaction *tr);