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/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c
index 060dcc1436..a4709a109b 100644
--- a/src/libsystemd-bus/sd-bus.c
+++ b/src/libsystemd-bus/sd-bus.c
@@ -2646,7 +2646,7 @@ _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) {
         if (r < 0)
                 goto fail;
 
-        r = sd_event_add_quit(bus->event, quit_callback, bus, &bus->quit_event_source);
+        r = sd_event_add_exit(bus->event, quit_callback, bus, &bus->quit_event_source);
         if (r < 0)
                 goto fail;