--- a/contrib/check-config.py	Fri Feb 05 22:32:05 2016 +0900
+++ b/contrib/check-config.py	Fri Feb 05 22:32:05 2016 +0900
@@ -105,4 +105,7 @@
                 print "undocumented: %s (%s)%s" % (name, ctype, default)
 
 if __name__ == "__main__":
-    sys.exit(main(sys.argv[1:]))
+    if len(sys.argv) > 1:
+        sys.exit(main(sys.argv[1:]))
+    else:
+        sys.exit(main([l.rstrip() for l in sys.stdin]))