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=item * offset

This determines the offset in the file that is mapped. Default is C<0>.

=item * flags

Extra flags that are used when opening the shared memory object (e.g. C<O_EXCL>).

=back

It returns a filehandle that can be used to with L<stat>, L<chmod>, L<chown>. For portability you should not assume you can read or write directly from it.

=head2 shared_unlink $name

Remove the shared memory object $name from the namespace. Note that while the shared memory object can't be opened anymore after this, it doesn't remove the contents until all processes have closed it.

=head1 SEE ALSO

=over 4

=item * SysV::SharedMem