1.\" Copyright (c) 2009 Alan L. Cox <alc@cs.rice.edu> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd September 21, 2009 28.Dt GETPAGESIZES 3 29.Os 30.Sh NAME 31.Nm getpagesizes 32.Nd "get system page sizes" 33.Sh LIBRARY 34.Lb libc 35.Sh SYNOPSIS 36.In sys/mman.h 37.Ft int 38.Fn getpagesizes "size_t pagesize[]" "int nelem" 39.Sh DESCRIPTION 40The 41.Fn getpagesizes 42function retrieves page size information from the system. 43When it is called with 44.Fa pagesize 45specified as 46.Dv NULL 47and 48.Fa nelem 49specified as 0, it returns the number of distinct page sizes that are 50supported by the system. 51Otherwise, it assigns up to 52.Fa nelem 53of the system-supported page sizes to consecutive elements of the 54array referenced by 55.Fa pagesize . 56These page sizes are expressed in bytes. 57In this case, 58.Fn getpagesizes 59returns the number of such page sizes that it assigned to the array. 60.Sh RETURN VALUES 61If successful, the 62.Fn getpagesizes 63function returns either the number of page sizes that are supported by 64the system or the number of supported page sizes that it assigned to 65the array referenced by 66.Fa pagesize . 67Otherwise, it returns the value\~\-1 and sets 68.Va errno 69to indicate the error. 70.Sh ERRORS 71The 72.Fn getpagesizes 73function will succeed unless: 74.Bl -tag -width Er 75.It Bq Er EINVAL 76The 77.Fa pagesize 78argument is 79.Dv NULL 80and the 81.Fa nelem 82argument is non-zero. 83.It Bq Er EINVAL 84The 85.Fa nelem 86argument is less than zero. 87.El 88.Sh SEE ALSO 89.Xr getpagesize 3 90.Sh HISTORY 91The 92.Fn getpagesizes 93function first appeared in Solaris 9. 94This manual page was written in conjunction with a new but compatible 95implementation that was first released in 96.Fx 7.3 . 97.Sh AUTHORS 98This manual page was written by 99.An Alan L. Cox Aq alc@cs.rice.edu . 100