From 663a92b8ba330a1be301601655772532f663f69f Mon Sep 17 00:00:00 2001
From: Magnus Jacobsson <magnus.jacobsson@berotec.se>
Date: Sat, 3 Oct 2020 16:04:44 +0200
Subject: [PATCH] Show usage and exit non-zero for unsupported option in
 lib/pack/ptest.c

Towards https://gitlab.com/graphviz/graphviz/-/issues/1843.
---
 lib/pack/ptest.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/pack/ptest.c b/lib/pack/ptest.c
index fb3deddf4..83d9a3d07 100644
--- a/lib/pack/ptest.c
+++ b/lib/pack/ptest.c
@@ -86,9 +86,11 @@ static void init(int argc, char *argv[])
 	case '?':
 	    if (optopt == '?')
 		usage(0);
-	    else
+	    else {
 		fprintf(stderr,
-			"ptest: option -%c unrecognized - ignored\n", c);
+			"ptest: option -%c unrecognized\n", c);
+		usage(1);
+	    }
 	    break;
 	}
     }
-- 
2.40.0