From: Magnus Jacobsson <magnus.jacobsson@berotec.se>
Date: Sat, 3 Oct 2020 14:03:50 +0000 (+0200)
Subject: Show usage and exit non-zero for unsupported option in mm2gv
X-Git-Tag: 2.46.0~20^2^2~47^2~21
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=41847dc697f2054ff0df093af1a3b36bd943a195;p=graphviz

Show usage and exit non-zero for unsupported option in mm2gv

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

diff --git a/cmd/tools/mm2gv.c b/cmd/tools/mm2gv.c
index 9ce50baff..0bf67c189 100644
--- a/cmd/tools/mm2gv.c
+++ b/cmd/tools/mm2gv.c
@@ -423,10 +423,12 @@ static void init(int argc, char **argv, parms_t * p)
  	case '?':
 	    if (optopt == '?')
 		usage(0);
-	    else
+	    else {
 		fprintf(stderr,
-			"%s: option -%c unrecognized - ignored\n", cmd,
+			"%s: option -%c unrecognized\n", cmd,
 			optopt);
+		usage(1);
+	    }
 	    break;
 	}
     }