v7 man page for getpagesize

getpagesize(3C) 					   Standard C Library Functions 					   getpagesize(3C)

NAME
       getpagesize - get system page size

SYNOPSIS
       #include <unistd.h>

       int getpagesize(void);

DESCRIPTION
       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 need not be the same as the underlying hardware page size.

       The getpagesize() function is equivalent to sysconf(_SC_PAGE_SIZE) and sysconf(_SC_PAGESIZE). See sysconf(3C).

RETURN VALUES
       The getpagesize() function returns the current page size.

ERRORS
       No errors are defined.

USAGE
       The value returned by getpagesize() need not be the minimum value that malloc(3C) can allocate.	Moreover, the  application  cannot  assume
       that an object of this size can be allocated with malloc().

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       pagesize(1), brk(2), getrlimit(2), mmap(2), mprotect(2), munmap(2), malloc(3C), msync(3C), sysconf(3C), attributes(5)

SunOS 5.10							    27 Jun 2000 						   getpagesize(3C)