main: add extra log info to output the exit status

Signed-off-by: Julien Fortin <julien@cumulusnetworks.com>

ifupdown2/__main__.py

@@ -103,6 +103,7 @@ def stand_alone():
             NetlinkListenerWithCache.get_instance().cleanup()
         except NetlinkListenerWithCacheErrorNotInitialized:
             status = Status.Client.STATUS_NLERROR
+    LogManager.get_instance().write("exit status %s" % status)
     return status
 
 

ifupdown2/lib/log.py

@@ -222,3 +222,6 @@ class LogManager:
             self.disable_console()
 
         self.set_daemon_logging_level(args)
+
+    def write(self, msg):
+        root_logger.info(msg)