4.4BSD/usr/share/man/cat3/getpagesize.0

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GETPAGESIZE(3)              BSD Programmer's Manual             GETPAGESIZE(3)

NNAAMMEE
     ggeettppaaggeessiizzee - get system page size

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<uunniissttdd..hh>>

     _i_n_t
     ggeettppaaggeessiizzee(_v_o_i_d);

DDEESSCCRRIIPPTTIIOONN
     GGeettppaaggeessiizzee() returns the number of bytes in a page.  Page granularity is
     the granularity of many of the memory management calls.

     The page size is a system page size and may not be the same as the under-
     lying hardware page size.

SSEEEE AALLSSOO
     sbrk(2),  pagesize(1)

HHIISSTTOORRYY
     The ggeettppaaggeessiizzee function call appeared in 4.2BSD.

4.2 Berkeley Distribution        June 4, 1993                                1