commit 347af3ca2f11f5a23a2b81f270bdbf65f435c946
from: Martijn van Duren <martijn@openbsd.org>
date: Mon Sep 25 19:08:46 2017 UTC

Allow vias to do config file checking without specifying a file.

commit - 13ffdf3b3762b05ed567c284e926cef7d912a76f
commit + 347af3ca2f11f5a23a2b81f270bdbf65f435c946
blob - aa6866e4b6ac5538312e8c5eb9d39107ee620a1b
blob + 696fee6f035af443405c30f413cbc8e487fb166c
--- vias.c
+++ vias.c
@@ -385,7 +385,7 @@ main(int argc, char **argv)
 	argv += optind;
 	argc -= optind;
 
-	if (argc == 0)
+	if (argc == 0 && confpath == NULL)
 		usage();
 	file = argv[0];
 	argv++;