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/libsystemd-bus/bus-internal.h b/src/libsystemd-bus/bus-internal.h
index faed183990..a1d60b1133 100644
--- a/src/libsystemd-bus/bus-internal.h
+++ b/src/libsystemd-bus/bus-internal.h
@@ -119,11 +119,12 @@ enum bus_state {
         BUS_AUTHENTICATING,
         BUS_HELLO,
         BUS_RUNNING,
+        BUS_CLOSING,
         BUS_CLOSED
 };
 
 static inline bool BUS_IS_OPEN(enum bus_state state) {
-        return state > BUS_UNSET && state < BUS_CLOSED;
+        return state > BUS_UNSET && state < BUS_CLOSING;
 }
 
 enum bus_auth {
@@ -155,7 +156,6 @@ struct sd_bus {
         bool anonymous_auth:1;
         bool prefer_readv:1;
         bool prefer_writev:1;
-        bool processing:1;
         bool match_callbacks_modified:1;
         bool filter_callbacks_modified:1;
         bool nodes_modified:1;