[src/trunk]: src/lib/libc/sys Document MAP_INHERIT_ZERO.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ca193b0b59d0
branches:  trunk
changeset: 797456:ca193b0b59d0
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Jul 18 12:39:17 2014 +0000

description:
Document MAP_INHERIT_ZERO.

diffstat:

 lib/libc/sys/minherit.2 |  11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diffs (40 lines):

diff -r 040ea23e51c2 -r ca193b0b59d0 lib/libc/sys/minherit.2
--- a/lib/libc/sys/minherit.2   Fri Jul 18 12:36:57 2014 +0000
+++ b/lib/libc/sys/minherit.2   Fri Jul 18 12:39:17 2014 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: minherit.2,v 1.18 2006/10/13 20:52:57 wiz Exp $
+.\"    $NetBSD: minherit.2,v 1.19 2014/07/18 12:39:17 christos Exp $
 .\"
 .\" Copyright (c) 1991, 1993
 .\"    The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"    @(#)minherit.2  8.1 (Berkeley) 6/9/93
 .\"
-.Dd October 7, 2006
+.Dd July 18, 2014
 .Dt MINHERIT 2
 .Os
 .Sh NAME
@@ -51,8 +51,9 @@
 which can be set to
 .Dv MAP_INHERIT_NONE ,
 .Dv MAP_INHERIT_COPY ,
+.Dv MAP_INHERIT_SHARE ,
 or
-.Dv MAP_INHERIT_SHARE .
+.Dv MAP_INHERIT_ZERO .
 Also possible is
 .Dv MAP_INHERIT_DEFAULT ,
 which defaults to
@@ -71,6 +72,10 @@
 are shared between the address spaces, while pages or regions marked
 .Dv MAP_INHERIT_NONE
 will be unmapped in the child.
+Finally pages or regions marked
+.Dv MAP_INHERIT_ZERO
+will still be present at the child, but will be initialized to
+.Dv 0 .
 .Sh RETURN VALUES
 .Rv -std minherit
 .Sh ERRORS