GETPAGESIZE(3) Library Functions Manual GETPAGESIZE(3)

getpagesize — get system page size

#include <unistd.h>

int
getpagesize(void);

This interface is obsoleted by sysconf(3). Use (_SC_PAGESIZE).

The () 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 underlying hardware page size.

pagesize(1), sbrk(2), sysconf(3)

The getpagesize() function call appeared in 4.1cBSD.

OpenBSD 7.8 February 5, 2023 GETPAGESIZE(3)