From 084b46ac51e36bfa6491008ca78c857f297f70fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mattias=20Andr=C3=A9e?= <maandree@kth.se>
Date: Fri, 6 Jul 2018 23:19:30 +0200
Subject: [PATCH] dirname: support --
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

POSIX-2017 clarifies that -- and normal option parsing must be supported.
See EXAMPLES in basename(1p)

Signed-off-by: Mattias Andrée <maandree@kth.se>
---
 dirname.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dirname.c b/dirname.c
index 8392bc0..45e1a7e 100644
--- a/dirname.c
+++ b/dirname.c
@@ -13,7 +13,10 @@ usage(void)
 int
 main(int argc, char *argv[])
 {
-	argv0 = *argv, argv0 ? (argc--, argv++) : (void *)0;
+	ARGBEGIN {
+	default:
+		usage();
+	} ARGEND
 
 	if (argc != 1)
 		usage();