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, 1 insertions, 1 deletions

diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c
index 0f67fb8d57..3f8b95dee0 100644
--- a/src/journal/journald-server.c
+++ b/src/journal/journald-server.c
@@ -1243,7 +1243,7 @@ static int dispatch_sigterm(sd_event_source *es, const struct signalfd_siginfo *
 
         log_info("Received SIG%s", signal_to_string(si->ssi_signo));
 
-        sd_event_request_quit(s->event);
+        sd_event_exit(s->event, 0);
         return 0;
 }