b22750720f
.Sh "SEE ALSO" to: .Sh SEE ALSO The doc macros check for the latter (actually just for 'SEE' as the first argument to .Sh) to set the section header SEE ALSO flag, which modifies some behaviour (e.g. references done with .Rs/.Re).
87 lines
2.9 KiB
Groff
87 lines
2.9 KiB
Groff
.\" $NetBSD: munmap.2,v 1.12 1999/04/06 04:54:20 cgd Exp $
|
|
.\"
|
|
.\" Copyright (c) 1991, 1993
|
|
.\" The Regents of the University of California. 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.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
.\"
|
|
.\" @(#)munmap.2 8.3 (Berkeley) 5/27/94
|
|
.\"
|
|
.Dd May 27, 1994
|
|
.Dt MUNMAP 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm munmap
|
|
.Nd remove a mapping
|
|
.Sh SYNOPSIS
|
|
.Fd #include <sys/types.h>
|
|
.Fd #include <sys/mman.h>
|
|
.Ft int
|
|
.Fn munmap "void *addr" "size_t len"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn munmap
|
|
system call
|
|
deletes the mappings for the specified address range,
|
|
and causes further references to addresses within the range
|
|
to generate invalid memory references.
|
|
.Sh RETURN VALUES
|
|
Upon successful completion,
|
|
.Nm munmap
|
|
returns zero.
|
|
Otherwise, a value of -1 is returned and
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ERRORS
|
|
.Fn munmap
|
|
will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
The
|
|
.Fa addr
|
|
parameter was not page aligned, the
|
|
.Fa len
|
|
parameter was negative, or
|
|
some part of the region being unmapped is outside the
|
|
valid address range for a process.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr madvise 2 ,
|
|
.Xr mincore 2 ,
|
|
.Xr mlock 2 ,
|
|
.Xr mmap 2 ,
|
|
.Xr mprotect 2 ,
|
|
.Xr msync 2 ,
|
|
.Xr getpagesize 3
|
|
.Sh HISTORY
|
|
The
|
|
.Fn munmap
|
|
function first appeared in
|
|
.Bx 4.4 .
|