.\"	$OpenBSD: getpagesize.3,v 1.3 1998/06/02 05:28:59 deraadt Exp $
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.Dd June 4, 1993
.Dt GETPAGESIZE 3
.Os BSD 4.2
.Sh NAME
.Nm getpagesize
.Nd get system page size
.Sh SYNOPSIS
.Fd #include <unistd.h>
.Ft int
.Fn getpagesize void
.Sh DESCRIPTION
.Bf -symbolic
This interface is obsoleted by
.Xr sysconf 3 .
Use
.Fn sysconf _SC_PAGESIZE .
.Ef 
.Pp 
.Fn Getpagesize
returns the number of bytes in a page.
Page granularity is the granularity of many of the memory
management calls.
.Pp
The page size is a 
.Xr system
page size and may not be the same as the underlying
hardware page size.
.Sh SEE ALSO
.Xr sysconf 3 ,
.Xr sbrk 2 ,
.Xr pagesize 1
.Sh HISTORY
The
.Nm
function call appeared in
.Bx 4.2 .