.\" Copyright (c) 1983, 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" %sccs.include.redist.man%
.\"
.\"     @(#)getpagesize.3	6.5 (Berkeley) 04/04/93
.\"
.Dd 
.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
.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 sbrk 2 ,
.Xr pagesize 1
.Sh HISTORY
The
.Nm
function call appeared in
.Bx 4.2 .