From c59d7441e1d55e2065d63f280643aa4ca4f34323 Mon Sep 17 00:00:00 2001
From: djm <djm@openbsd.org>
Date: Sat, 23 Aug 2008 07:51:35 +0000
Subject: [PATCH] make mbstowcs(NULL, string, 0) correctly return the length of
 the wchar_t string needed to represent "string", which in our case is just
 strlen(string); feedback & "looks right" deraadt@

---
 lib/libc/locale/multibyte_sb.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/libc/locale/multibyte_sb.c b/lib/libc/locale/multibyte_sb.c
index 6f11625315d..4067b154b02 100644
--- a/lib/libc/locale/multibyte_sb.c
+++ b/lib/libc/locale/multibyte_sb.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: multibyte_sb.c,v 1.6 2005/12/10 02:01:51 deraadt Exp $	*/
+/*	$OpenBSD: multibyte_sb.c,v 1.7 2008/08/23 07:51:35 djm Exp $	*/
 /*	$NetBSD: multibyte_sb.c,v 1.4 2003/08/07 16:43:04 agc Exp $	*/
 
 /*
@@ -132,7 +132,8 @@ mbstowcs(wchar_t *pwcs, const char *s, size_t n)
 {
 
 	/* pwcs may be NULL */
-	/* s may be NULL */
+	if (pwcs == NULL)
+		return strlen(s);
 
 	return mbsrtowcs(pwcs, &s, n, NULL);
 }
-- 
2.20.1