1.\" $OpenBSD: getpagesize.3,v 1.11 2013/06/05 03:39:22 tedu Exp $ 2.\" 3.\" Copyright (c) 1983, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.Dd $Mdocdate: June 5 2013 $ 31.Dt GETPAGESIZE 3 32.Os 33.Sh NAME 34.Nm getpagesize 35.Nd get system page size 36.Sh SYNOPSIS 37.In unistd.h 38.Ft int 39.Fn getpagesize void 40.Sh DESCRIPTION 41.Bf -symbolic 42This interface is obsoleted by 43.Xr sysconf 3 . 44Use 45.Fn sysconf _SC_PAGESIZE . 46.Ef 47.Pp 48The 49.Fn getpagesize 50function returns the number of bytes in a page. 51Page granularity is the granularity of many of the memory 52management calls. 53.Pp 54The page size is a system 55page size and may not be the same as the underlying 56hardware page size. 57.Sh SEE ALSO 58.Xr pagesize 1 , 59.Xr sbrk 2 , 60.Xr sysconf 3 61.Sh HISTORY 62The 63.Fn getpagesize 64function call appeared in 65.Bx 4.2 . 66