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UNIX for Dummies Questions & Answers
Directory sizes
Post 40849 by Perderabo on Wednesday 24th of September 2003 09:24:12 AM
09-24-2003
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LEARN ABOUT PLAN9
getpagesizes
getpagesizes(3C) Standard C Library Functions getpagesizes(3C) NAME
getpagesizes - get system supported page sizes SYNOPSIS
#include <sys/mman.h> int getpagesizes(size_t pagesize[], int nelem); DESCRIPTION
The getpagesizes() function returns either the number of different page sizes supported by the system or the actual sizes themselves. When called with nelem as 0 and pagesize as NULL, getpagesizes() returns the number of supported page sizes. Otherwise, up to nelem page sizes are retrieved and assigned to successive elements of pagesize[]. The return value is the number of page sizes retrieved and set in page- size[]. RETURN VALUES
Upon successful completion, the number of pagesizes supported or actually retrieved is returned. Otherwise, -1 is returned and errno is set to indicate the error. ERRORS
The getpagesizes() function will fail if: EINVAL The nelem argument is less than 0 or pagesize is NULL but nelem is non-zero. USAGE
The getpagesizes() function returns all the page sizes for which the hardware and system software provide support for the memcntl(2) com- mand MC_HAT_ADVISE. Not all processors support all page sizes or combinations of page sizes with equal efficiency. Applications programmers should take this into consideration when using getpagesizes(). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
memcntl(2), mmap(2), getpagesize(3C), attributes(5) SunOS 5.10 14 May 2001 getpagesizes(3C)