2009-09-19 18:01:32 +00:00
|
|
|
.\" Copyright (c) 2009 Alan L. Cox <alc@cs.rice.edu>
|
|
|
|
|
.\" 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.
|
|
|
|
|
.\"
|
|
|
|
|
.\" $FreeBSD$
|
|
|
|
|
.\"
|
2009-09-21 18:02:02 +00:00
|
|
|
.Dd September 21, 2009
|
2009-09-19 18:01:32 +00:00
|
|
|
.Dt GETPAGESIZES 3
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm getpagesizes
|
|
|
|
|
.Nd "get system page sizes"
|
|
|
|
|
.Sh LIBRARY
|
|
|
|
|
.Lb libc
|
|
|
|
|
.Sh SYNOPSIS
|
|
|
|
|
.In sys/mman.h
|
|
|
|
|
.Ft int
|
|
|
|
|
.Fn getpagesizes "size_t pagesize[]" "int nelem"
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.Fn getpagesizes
|
|
|
|
|
function retrieves page size information from the system.
|
|
|
|
|
When it is called with
|
|
|
|
|
.Fa pagesize
|
|
|
|
|
specified as
|
|
|
|
|
.Dv NULL
|
|
|
|
|
and
|
|
|
|
|
.Fa nelem
|
|
|
|
|
specified as 0, it returns the number of distinct page sizes that are
|
|
|
|
|
supported by the system.
|
|
|
|
|
Otherwise, it assigns up to
|
|
|
|
|
.Fa nelem
|
|
|
|
|
of the system-supported page sizes to consecutive elements of the
|
|
|
|
|
array referenced by
|
|
|
|
|
.Fa pagesize .
|
|
|
|
|
These page sizes are expressed in bytes.
|
|
|
|
|
In this case,
|
|
|
|
|
.Fn getpagesizes
|
2012-03-29 05:02:12 +00:00
|
|
|
returns the number of such page sizes that it assigned to the array.
|
2009-09-19 18:01:32 +00:00
|
|
|
.Sh RETURN VALUES
|
|
|
|
|
If successful, the
|
|
|
|
|
.Fn getpagesizes
|
|
|
|
|
function returns either the number of page sizes that are supported by
|
|
|
|
|
the system or the number of supported page sizes that it assigned to
|
|
|
|
|
the array referenced by
|
|
|
|
|
.Fa pagesize .
|
|
|
|
|
Otherwise, it returns the value\~\-1 and sets
|
|
|
|
|
.Va errno
|
|
|
|
|
to indicate the error.
|
|
|
|
|
.Sh ERRORS
|
|
|
|
|
The
|
|
|
|
|
.Fn getpagesizes
|
|
|
|
|
function will succeed unless:
|
|
|
|
|
.Bl -tag -width Er
|
|
|
|
|
.It Bq Er EINVAL
|
|
|
|
|
The
|
|
|
|
|
.Fa pagesize
|
|
|
|
|
argument is
|
|
|
|
|
.Dv NULL
|
|
|
|
|
and the
|
|
|
|
|
.Fa nelem
|
|
|
|
|
argument is non-zero.
|
|
|
|
|
.It Bq Er EINVAL
|
|
|
|
|
The
|
|
|
|
|
.Fa nelem
|
|
|
|
|
argument is less than zero.
|
|
|
|
|
.El
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr getpagesize 3
|
|
|
|
|
.Sh HISTORY
|
|
|
|
|
The
|
|
|
|
|
.Fn getpagesizes
|
|
|
|
|
function first appeared in Solaris 9.
|
|
|
|
|
This manual page was written in conjunction with a new but compatible
|
|
|
|
|
implementation that was first released in
|
|
|
|
|
.Fx 7.3 .
|
2009-09-21 18:02:02 +00:00
|
|
|
.Sh AUTHORS
|
|
|
|
|
This manual page was written by
|
|
|
|
|
.An Alan L. Cox Aq alc@cs.rice.edu .
|
