minherit man page on OpenBSD

minherit man page on OpenBSD

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MINHERIT(2)		  OpenBSD Programmer's Manual		   MINHERIT(2)

NAME
     minherit - control the inheritance of pages

SYNOPSIS
     #include <sys/types.h>
     #include <sys/mman.h>

     int
     minherit(void *addr, size_t len, int inherit);

DESCRIPTION
     The minherit() system call changes the specified pages to have the
     inheritance characteristic inherit, which can be set to MAP_INHERIT_NONE,
     MAP_INHERIT_COPY, or MAP_INHERIT_SHARE.  Not all implementations will
     guarantee that the inheritance characteristic can be set on a page basis;
     the granularity of changes may be as large as an entire region.

RETURN VALUES
     The minherit() function returns the value 0 if successful; otherwise the
     value -1 is returned and the global variable errno is set to indicate the
     error.

ERRORS
     The minherit() system call will fail if:

     [EINVAL]	   The virtual address range specified by the addr and len
		   arguments is not valid.

     [EACCES]	   The flags specified by the inherit argument were not valid
		   for the pages specified by the addr and len arguments.

SEE ALSO
     madvise(2), mincore(2), mprotect(2), msync(2), munmap(2)

HISTORY
     The minherit() function first appeared in OpenBSD 2.0.

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9

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