From e37b0cbef8b7cc598fdb5f9e858856971f4d2985 Mon Sep 17 00:00:00 2001
From: deraadt <deraadt@openbsd.org>
Date: Sun, 17 May 2015 01:56:02 +0000
Subject: [PATCH] Of course, fcntl errno case returns -1, which must be
 converted to 0 with guenther

---
 lib/libc/gen/isatty.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/libc/gen/isatty.c b/lib/libc/gen/isatty.c
index 3b63f2575c4..c0b543698db 100644
--- a/lib/libc/gen/isatty.c
+++ b/lib/libc/gen/isatty.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isatty.c,v 1.9 2015/05/17 01:22:01 deraadt Exp $ */
+/*	$OpenBSD: isatty.c,v 1.10 2015/05/17 01:56:02 deraadt Exp $ */
 /*
  * Copyright (c) 1988, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -33,5 +33,5 @@
 int
 isatty(int fd)
 {
-	return (fcntl(fd, F_ISATTY));
+	return fcntl(fd, F_ISATTY) != -1;
 }
-- 
2.20.1