From: Magnus Jacobsson <Magnus.Jacobsson@berotec.se>
Date: Tue, 20 Oct 2020 06:30:27 +0000 (+0200)
Subject: Fix dijkstra -? to actually print usage instead of error on macOS
X-Git-Tag: 2.46.0~20^2^2~15^2~16
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=424b6c648aa2012a63792b6296c254c8cdb13b40;p=graphviz

Fix dijkstra -? to actually print usage instead of error on macOS

Towards https://gitlab.com/graphviz/graphviz/-/issues/1852.
---

diff --git a/cmd/tools/dijkstra.c b/cmd/tools/dijkstra.c
index ddf5704e8..2b3819380 100644
--- a/cmd/tools/dijkstra.c
+++ b/cmd/tools/dijkstra.c
@@ -261,7 +261,7 @@ static void init(int argc, char *argv[])
 	    doPath = 1;
 	    break;
 	case '?':
-	    if (optopt == '\0')
+	    if (optopt == '\0' || optopt == '?')
 		usage(0);
 	    else {
 		fprintf(stderr, "%s: option -%c unrecognized\n",