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, 1 insertions, 1 deletions

diff --git a/src/core/snapshot.h b/src/core/snapshot.h
index 2675b1b242..e6dc661060 100644
--- a/src/core/snapshot.h
+++ b/src/core/snapshot.h
@@ -42,7 +42,7 @@ struct Snapshot {
 
 extern const UnitVTable snapshot_vtable;
 
-int snapshot_create(Manager *m, const char *name, bool cleanup, DBusError *e, Snapshot **s);
+int snapshot_create(Manager *m, const char *name, bool cleanup, sd_bus_error *e, Snapshot **s);
 void snapshot_remove(Snapshot *s);
 
 const char* snapshot_state_to_string(SnapshotState i) _const_;