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, 3 insertions, 1 deletions

diff --git a/src/libsystemd-bus/test-bus-introspect.c b/src/libsystemd-bus/test-bus-introspect.c
index ae41618647..b9865349ac 100644
--- a/src/libsystemd-bus/test-bus-introspect.c
+++ b/src/libsystemd-bus/test-bus-introspect.c
@@ -52,7 +52,9 @@ int main(int argc, char *argv[]) {
 
         assert_se(introspect_begin(&intro) >= 0);
 
-        assert_se(introspect_write_interface(&intro, "org.foo", vtable) >= 0);
+        fprintf(intro.f, " <interface name=\"org.foo\">\n");
+        assert_se(introspect_write_interface(&intro, vtable) >= 0);
+        fputs(" </interface>\n", intro.f);
 
         fflush(intro.f);
         fputs(intro.introspection, stdout);