sd-bus: optionally, exit process or event loop on disconnect

Old libdbus has a feature that the process is terminated whenever the the bus
connection receives a disconnect. This is pretty useful on desktop apps (where
a disconnect indicates session termination), as well as on command line apps
(where we really shouldn't stay hanging in most cases if dbus daemon goes
down).

Add a similar feature to sd-bus, but make it opt-in rather than opt-out, like
it is on libdbus. Also, if the bus is attached to an event loop just exit the
event loop rather than the the whole process.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/libsystemd/sd-bus/bus-internal.h b/src/libsystemd/sd-bus/bus-internal.h
index 13357075bf..2608f5469c 100644
--- a/src/libsystemd/sd-bus/bus-internal.h
+++ b/src/libsystemd/sd-bus/bus-internal.h
@@ -209,6 +209,9 @@ struct sd_bus {
         bool is_system:1;
         bool is_user:1;
         bool allow_interactive_authorization:1;
+        bool exit_on_disconnect:1;
+        bool exited:1;
+        bool exit_triggered:1;
 
         int use_memfd;