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incremental backup (most backup programs now instead use the 
last-modified-time of the file for this purpose). By setting certain
attributes of the file and specifying directives as in the SYNOPSIS,
particularly the C<Includes> option, 
C<XBitHack> can be emulated in the following ways.

=head2 XBitHack Off

With this directive, no server-side parsing of the file
will be performed.

=head2 XBitHack On

This directive emulates setting the user-execute bit. With this
directive, a file will parsed by mod_include if the C<archive> 
attribute is B<unset>, which you can do by

   C:\> attrib -a file_name

Note that when a user's file is first created or when it is edited 
the C<archive> attribute will normally be set (and all others unset),
so you must intentionally unset the C<archive> attribute to enable 
server-parsing of the file.

=head2 XBitHack Full

This directive emulates the action of also setting the group-execute 
bit. With this directive, as with C<XBitHack On>, a file will be 
parsed by mod_include if the C<archive> attribute is unset. As well, 
a Last-modified header will be sent, equal to the last-modified time 
of the file, I<unless> the C<read-only> attribute of the file is B<set>, 
which you can do by

   C:\> attrib +r file_name

=head1 SEE ALSO

L<mod_perl>

The description of the C<XBitHack> directive in the Apache
manual (http://httpd.apache.org/docs/mod/directives.html).

=head1 AUTHORS

Randy Kobes <randy@modperlcookbook.org>

Geoffrey Young <geoff@modperlcookbook.org>

Paul Lindner <paul@modperlcookbook.org>

=head1 COPYRIGHT

Copyright (c) 2001, Geoffrey Young, Paul Lindner, Randy Kobes.  
All rights reserved.

This module is free software.  It may be used, redistributed
and/or modified under the same terms as Perl itself.

=head1 HISTORY

This code is derived from the I<Cookbook::WinBitHack> module,
available as part of "The mod_perl Developer's Cookbook".

For more information, visit http://www.modperlcookbook.org/

=cut