GETPAGESIZE(3) BSD Programmer's Manual GETPAGESIZE(3)
getpagesize - get system page size
#include <unistd.h> int getpagesize(void);
This interface is obsoleted by sysconf(3). Use sysconf(_SC_PAGESIZE). The getpagesize() function 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.
pagesize(1), sbrk(2), sysconf(3)
The getpagesize() function call appeared in 4.2BSD. MirBSD #10-current June 4, 1993 1