NAME    [Toc]    [Back]

     minherit - control the inheritance of pages

SYNOPSIS    [Toc]    [Back]

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

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

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

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

HISTORY    [Toc]    [Back]

     The minherit() function first appeared in OpenBSD 2.0.

OpenBSD      3.6                           June      9,      1993