From: Magnus Jacobsson <magnus.jacobsson@berotec.se>
Date: Fri, 2 Oct 2020 13:17:21 +0000 (+0200)
Subject: Show usage and exit non-zero for unsupported option in mingle
X-Git-Tag: 2.46.0~20^2^2~47^2~29
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1395a1f5f972924a1b072d1a2150c5b9c9518040;p=graphviz

Show usage and exit non-zero for unsupported option in mingle

Towards https://gitlab.com/graphviz/graphviz/-/issues/1843.
---

diff --git a/cmd/mingle/minglemain.c b/cmd/mingle/minglemain.c
index ab8fd739c..c2403dd21 100644
--- a/cmd/mingle/minglemain.c
+++ b/cmd/mingle/minglemain.c
@@ -207,8 +207,10 @@ static void init(int argc, char *argv[], opts_t* opts)
 		case '?':
 			if (optopt == '?')
 				usage(0);
-			else
-				fprintf(stderr, "%s: option -%c unrecognized - ignored\n", cmd, optopt);
+			else {
+				fprintf(stderr, "%s: option -%c unrecognized\n", cmd, optopt);
+				usage(1);
+			}
 			break;
 		default:
 			break;