freebsd man page for getpagesizes

GETPAGESIZES(3) 					   BSD Library Functions Manual 					   GETPAGESIZES(3)

NAME
     getpagesizes -- get system page sizes

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/mman.h>

     int
     getpagesizes(size_t pagesize[], int nelem);

DESCRIPTION
     The getpagesizes() function retrieves page size information from the system.  When it is called with pagesize specified as NULL and nelem
     specified as 0, it returns the number of distinct page sizes that are supported by the system.  Otherwise, it assigns up to nelem of the sys-
     tem-supported page sizes to consecutive elements of the array referenced by pagesize.  These page sizes are expressed in bytes.  In this
     case, getpagesizes() returns the number of such page sizes that it assigned to the array.

RETURN VALUES
     If successful, the getpagesizes() function returns either the number of page sizes that are supported by the system or the number of sup-
     ported page sizes that it assigned to the array referenced by pagesize.  Otherwise, it returns the value -1 and sets errno to indicate the
     error.

ERRORS
     The getpagesizes() function will succeed unless:

     [EINVAL]		The pagesize argument is NULL and the nelem argument is non-zero.

     [EINVAL]		The nelem argument is less than zero.

SEE ALSO
     getpagesize(3)

HISTORY
     The getpagesizes() function first appeared in Solaris 9.  This manual page was written in conjunction with a new but compatible implementa-
     tion that was first released in FreeBSD 7.3.

AUTHORS
     This manual page was written by Alan L. Cox <alc@cs.rice.edu>.

BSD
								September 21, 2009							       BSD