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.Dd September 21, 2009 26.Dt GETPAGESIZES 3 27.Os 28.Sh NAME 29.Nm getpagesizes 30.Nd "get system page sizes" 31.Sh LIBRARY 32.Lb libc 33.Sh SYNOPSIS 34.In sys/mman.h 35.Ft int 36.Fn getpagesizes "size_t pagesize[]" "int nelem" 37.Sh DESCRIPTION 38The 39.Fn getpagesizes 40function retrieves page size information from the system. 41When it is called with 42.Fa pagesize 43specified as 44.Dv NULL 45and 46.Fa nelem 47specified as 0, it returns the number of distinct page sizes that are 48supported by the system. 49Otherwise, it assigns up to 50.Fa nelem 51of the system-supported page sizes to consecutive elements of the 52array referenced by 53.Fa pagesize . 54These page sizes are expressed in bytes. 55In this case, 56.Fn getpagesizes 57returns the number of such page sizes that it assigned to the array. 58.Sh RETURN VALUES 59If successful, the 60.Fn getpagesizes 61function returns either the number of page sizes that are supported by 62the system or the number of supported page sizes that it assigned to 63the array referenced by 64.Fa pagesize . 65Otherwise, it returns the value\~\-1 and sets 66.Va errno 67to indicate the error. 68.Sh ERRORS 69The 70.Fn getpagesizes 71function will succeed unless: 72.Bl -tag -width Er 73.It Bq Er EINVAL 74The 75.Fa pagesize 76argument is 77.Dv NULL 78and the 79.Fa nelem 80argument is non-zero. 81.It Bq Er EINVAL 82The 83.Fa nelem 84argument is less than zero. 85.El 86.Sh SEE ALSO 87.Xr getpagesize 3 88.Sh HISTORY 89The 90.Fn getpagesizes 91function first appeared in Solaris 9. 92This manual page was written in conjunction with a new but compatible 93implementation that was first released in 94.Fx 7.3 . 95.Sh AUTHORS 96This manual page was written by 97.An Alan L. Cox Aq Mt alc@cs.rice.edu . 98