mincore(2)							   System Calls 							mincore(2)

NAME

       mincore - determine residency of memory pages

SYNOPSIS

       #include <sys/types.h>

       int mincore(caddr_t addr, size_t len, char *vec);

DESCRIPTION

       The  mincore()  function  determines  the residency of the memory pages in the address space covered by mappings in the range [addr, addr +
       len]. The status is returned as a character-per-page in the character array referenced by *vec (which the system assumes to be large enough
       to  encompass  all the pages in the address range). The least significant bit of each character is set to 1 to indicate that the referenced
       page is in primary memory, and to 0 to indicate that it is not. The settings of other bits in each character are undefined and may  contain
       other information in future implementations.

       Because	the  status of a page can change between the time mincore() checks and returns the information, returned information might be out-
       dated. Only locked pages are guaranteed to remain in memory; see mlock(3C).

RETURN VALUES

       Upon successful completion, mincore() returns 0.  Otherwise, -1 is returned and errno is set to indicate the error.

ERRORS

       The mincore() function will fail if:

       EFAULT	       The vec argument points to an illegal address.

       EINVAL	       The addr argument is not a multiple of the page size as returned by sysconf(3C), or the	len argument has a value less than
		       or equal to 0.

       ENOMEM	       Addresses in the range [addr, addr + len] are invalid for the address space of a process or specify one or more pages which
		       are not mapped.

SEE ALSO

       mmap(2), mlock(3C), sysconf(3C)

SunOS 5.10							    12 Aug 1990 							mincore(2)