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.\"     @(#)getpagesize.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD: head/lib/libc/gen/getpagesize.3 165903 2007-01-09 00:28:16Z imp $
.\"
.Dd June 4, 1993
.Dt GETPAGESIZE 3
.Os
.Sh NAME
.Nm getpagesize
.Nd get system page size
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In unistd.h
.Ft int
.Fn getpagesize void
.Sh DESCRIPTION
The
.Fn getpagesize
function
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 system
page size and may not be the same as the underlying
hardware page size.
.Sh SEE ALSO
.Xr pagesize 1 ,
.Xr sbrk 2
.Sh HISTORY
The
.Fn getpagesize
function appeared in
.Bx 4.2 .