82 lines
2.5 KiB
Groff
82 lines
2.5 KiB
Groff
.\"
|
|
.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd July 19, 2003
|
|
.Dt vm_map_inherit 9
|
|
.Sh NAME
|
|
.Nm vm_map_inherit
|
|
.Nd set fork inheritance flags for a range within a map
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In vm/vm.h
|
|
.In vm/vm_map.h
|
|
.Ft int
|
|
.Fn vm_map_inherit "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "vm_inherit_t new_inheritance"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn vm_map_inherit
|
|
function sets the inheritance flags for the range
|
|
.Fa start
|
|
to
|
|
.Fa end
|
|
within the target
|
|
.Fa map
|
|
to the value
|
|
.Fa new_inheritance .
|
|
.Pp
|
|
The
|
|
.Fa new_inheritance
|
|
flag must have one of the values
|
|
.Dv VM_INHERIT_NONE ,
|
|
.Dv VM_INHERIT_COPY ,
|
|
or
|
|
.Dv VM_INHERIT_SHARE .
|
|
This affects how the map will be shared with child maps when the
|
|
associated process forks.
|
|
.Sh IMPLEMENTATION NOTES
|
|
The
|
|
.Fn
|
|
function obtains a lock on the
|
|
.Fa map
|
|
using
|
|
.Xr vm_map_lock 9
|
|
for the duration of the function.
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn vm_map_inherit
|
|
function returns
|
|
.Dv KERN_SUCCESS
|
|
if the inheritance flags could be set.
|
|
Otherwise, if the provided flags were invalid,
|
|
.Dv KERN_INVALID_ARGUMENT
|
|
will be returned.
|
|
.Sh SEE ALSO
|
|
.Xr fork 2
|
|
.Sh AUTHORS
|
|
This man page was written by
|
|
.An Bruce M Simpson Aq bms@spc.org .
|