exit codes for kojivmd

vm/kojivmd

@@ -252,6 +252,7 @@ def main(options, session):
         tm.restart_pending = True
     signal.signal(signal.SIGTERM, shutdown)
     signal.signal(signal.SIGUSR1, restart)
+    exit_code = 0
     taken = False
     tm.cleanupAllVMs()
     while True:
@@ -270,6 +271,11 @@ def main(options, session):
             raise
         except koji.AuthExpired:
             logger.error('Session expired')
+            exit_code = 1
+            break
+        except koji.AuthError:
+            logger.error('Authentication error')
+            exit_code = 1
             break
         except Exception:
             # XXX - this is a little extreme
@@ -287,7 +293,7 @@ def main(options, session):
     logger.warning("Shutting down, please wait...")
     tm.shutdown()
     session.logout()
-    sys.exit(0)
+    sys.exit(exit_code)
 
 
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