sd-bus: introduce new sd_bus_flush_close_unref() call

sd_bus_flush_close_unref() is a call that simply combines sd_bus_flush()
(which writes all unwritten messages out) + sd_bus_close() (which
terminates the connection, releasing all unread messages) +
sd_bus_unref() (which frees the connection).

The combination of this call is used pretty frequently in systemd tools
right before exiting, and should also be relevant for most external
clients, and is hence useful to cover in a call of its own.

Previously the combination of the three calls was already done in the
_cleanup_bus_close_unref_ macro, but this was only available internally.

Also see #327

1 files changed, 11 insertions, 0 deletions

diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
index 5dd6468707..0ca225c617 100644
--- a/src/libsystemd/sd-bus/sd-bus.c
+++ b/src/libsystemd/sd-bus/sd-bus.c
@@ -1428,6 +1428,17 @@ _public_ void sd_bus_close(sd_bus *bus) {
          * ioctl on the fd when they are freed. */
 }
 
+_public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) {
+
+        if (!bus)
+                return NULL;
+
+        sd_bus_flush(bus);
+        sd_bus_close(bus);
+
+        return sd_bus_unref(bus);
+}
+
 static void bus_enter_closing(sd_bus *bus) {
         assert(bus);