From 3821789421bd165d6c8fee1274502f5d07a3972c Mon Sep 17 00:00:00 2001
From: millert <millert@openbsd.org>
Date: Wed, 5 Apr 2017 18:15:43 +0000
Subject: [PATCH] Not all devices support mmap, document EINVAL in this case
 too. OK deraadt@

---
 lib/libc/sys/mmap.2 | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/libc/sys/mmap.2 b/lib/libc/sys/mmap.2
index b37f99d7cc0..51094a46967 100644
--- a/lib/libc/sys/mmap.2
+++ b/lib/libc/sys/mmap.2
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: mmap.2,v 1.54 2017/03/11 22:58:46 jmc Exp $
+.\"	$OpenBSD: mmap.2,v 1.55 2017/04/05 18:15:43 millert Exp $
 .\"	$NetBSD: mmap.2,v 1.5 1995/06/24 10:48:59 cgd Exp $
 .\"
 .\" Copyright (c) 1991, 1993
@@ -30,7 +30,7 @@
 .\"
 .\"	@(#)mmap.2	8.1 (Berkeley) 6/4/93
 .\"
-.Dd $Mdocdate: March 11 2017 $
+.Dd $Mdocdate: April 5 2017 $
 .Dt MMAP 2
 .Os
 .Sh NAME
@@ -263,6 +263,10 @@ specified a region that would extend beyond the end of the address space.
 .Fa fd
 did not specify a regular, character special, or block special file.
 .It Bq Er EINVAL
+.Fa fd
+specified a character special or block special file and the underlying
+device does not support memory mapping.
+.It Bq Er EINVAL
 The allocation
 .Fa len
 was 0.
-- 
2.20.1