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BBC / File-Policy-1.005 / lib / File / Slurp / WithinPolicy.pm 

            

              
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###############################################################################
# Purpose : Hide site-dependent FS policies beneath a well-known interface
# Author  : John Alden
# Created : March 2005
# CVS     : $Id: WithinPolicy.pm,v 1.4 2005/06/15 10:40:21 simonf Exp $
###############################################################################
package File::Slurp::WithinPolicy;
use strict;
use Carp;
use Exporter;
use Fcntl ':flock';
use File::Slurp();
use File::Policy;
use vars qw($VERSION @EXPORT_OK %EXPORT_TAGS @ISA);
@ISA = qw(Exporter);
@EXPORT_OK = qw(read_file write_file append_file overwrite_file read_dir);
%EXPORT_TAGS = ('all' => \@EXPORT_OK);
$VERSION = sprintf"%d.%03d", q$Revision: 1.4 $ =~ /: (\d+)\.(\d+)/;
sub read_file { 
        File::Policy::check_safe( $_[0], 'r' );
        goto &File::Slurp::read_file;
}
sub write_file {        
        File::Policy::check_safe( $_[0], 'w' );
        goto &File::Slurp::write_file;
}
sub append_file {       
        File::Policy::check_safe( $_[0], 'w' );
        goto &File::Slurp::append_file;
}
sub overwrite_file {    
        File::Policy::check_safe( $_[0], 'w' );
        goto &File::Slurp::overwrite_file;
}
sub read_dir {  
        File::Policy::check_safe( $_[0], 'r' );
        goto &File::Slurp::read_dir;
}
1;
=head1 NAME
File::Slurp::WithinPolicy - Applies filesystem policies to File::Slurp
=head1 SYNOPSIS
  use File::Slurp::WithinPolicy qw(:all);
  my $text = read_file( 'filename' );
  my @lines = read_file( 'filename' );
  write_file( 'filename', $text );
  append_file( 'filename', $more_text );
  overwrite_file( 'filename', $text );
  my @files = read_dir( '/path/to/dir' );
=head1 DESCRIPTION
This provides the File::Slurp interface within a policy defined by File::Policy.
By default, File::Policy is a no-op and this behaves identically to File::Slurp.
System administrators may want to override the default File::Policy implementation to enforce a local filesystem policy
(see L<File::Policy>).
=head1 FUNCTIONS
=head2 read_dir
See L<File::Slurp/read_dir>
=head2 read_file
See L<File::Slurp/read_file>
=head2 write_file
See L<File::Slurp/write_file>
=head2 append_file
See L<File::Slurp/append_file>
=head2 overwrite_file
See L<File::Slurp/overwrite_file>
=head1 EXPORTS
By default, nothing is exported.
The C<:all> tag can be used to export everything.
Individual methods can also be exported.
=head1 SEE ALSO
L<File::Slurp>, L<File::Policy>
=head1 VERSION
$Revision: 1.4 $ on $Date: 2005/06/15 10:40:21 $ by $Author: simonf $
=head1 AUTHOR
John Alden <cpan _at_ bbc _dot_ co _dot_ uk>
=head1 COPYRIGHT
(c) BBC 2005. This program is free software; you can redistribute it and/or modify it under the GNU GPL.
See the file COPYING in this distribution, or http://www.gnu.org/licenses/gpl.txt 
=cut