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, 4 insertions, 13 deletions

diff --git a/src/core/job.h b/src/core/job.h
index be9d278b0c..60bb87d75a 100644
--- a/src/core/job.h
+++ b/src/core/job.h
@@ -27,7 +27,6 @@
 
 typedef struct Job Job;
 typedef struct JobDependency JobDependency;
-typedef struct JobBusClient JobBusClient;
 typedef enum JobType JobType;
 typedef enum JobState JobState;
 typedef enum JobMode JobMode;
@@ -102,6 +101,7 @@ enum JobResult {
         _JOB_RESULT_INVALID = -1
 };
 
+#include "sd-event.h"
 #include "manager.h"
 #include "unit.h"
 #include "hashmap.h"
@@ -120,13 +120,6 @@ struct JobDependency {
         bool conflicts;
 };
 
-struct JobBusClient {
-        LIST_FIELDS(JobBusClient, client);
-        /* Note that this bus object is not ref counted here. */
-        DBusConnection *bus;
-        char name[0];
-};
-
 struct Job {
         Manager *manager;
         Unit *unit;
@@ -147,10 +140,11 @@ struct Job {
         JobType type;
         JobState state;
 
-        Watch timer_watch;
+        sd_event_source *timer_event_source;
+        usec_t begin_usec;
 
         /* There can be more than one client, because of job merging. */
-        LIST_HEAD(JobBusClient, bus_client_list);
+        Set *subscribed;
 
         JobResult result;
 
@@ -165,8 +159,6 @@ struct Job {
         bool irreversible:1;
 };
 
-JobBusClient* job_bus_client_new(DBusConnection *connection, const char *name);
-
 Job* job_new(Unit *unit, JobType type);
 Job* job_new_raw(Unit *unit);
 void job_free(Job *job);
@@ -210,7 +202,6 @@ void job_add_to_run_queue(Job *j);
 void job_add_to_dbus_queue(Job *j);
 
 int job_start_timer(Job *j);
-void job_timer_event(Job *j, uint64_t n_elapsed, Watch *w);
 
 int job_run_and_invalidate(Job *j);
 int job_finish_and_invalidate(Job *j, JobResult result, bool recursive);