event: rework sd-event exit logic

With this change a failing event source handler will not cause the
entire event loop to fail. Instead, we just disable the specific event
source, log a message at debug level and go on.

This also introduces a new concept of "exit code" which can be stored in
the event loop and is returned by sd_event_loop(). We also rename "quit"
to "exit" everywhere else.

Altogether this should make things more robus and keep errors local
while still providing a way to return event loop errors in a clear way.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/libsystemd-bus/libsystemd-bus.sym b/src/libsystemd-bus/libsystemd-bus.sym
index 4a849b382a..f3dbb760ce 100644
--- a/src/libsystemd-bus/libsystemd-bus.sym
+++ b/src/libsystemd-bus/libsystemd-bus.sym
@@ -227,15 +227,15 @@ global:
         sd_event_add_signal;
         sd_event_add_child;
         sd_event_add_defer;
-        sd_event_add_quit;
+        sd_event_add_exit;
 
         sd_event_run;
         sd_event_loop;
+        sd_event_exit;
 
         sd_event_get_state;
         sd_event_get_tid;
-        sd_event_get_quit;
-        sd_event_request_quit;
+        sd_event_get_exit_code;
         sd_event_get_now_realtime;
         sd_event_get_now_monotonic;
         sd_event_set_watchdog;