--- /dev/null
+##############################################################################
+# $URL: http://perlcritic.tigris.org/svn/perlcritic/trunk/Perl-Critic/lib/Perl/Critic/Policy/InputOutput/RequireCheckedOpen.pm $
+# $Date: 2008-07-03 10:19:10 -0500 (Thu, 03 Jul 2008) $
+# $Author: clonezone $
+# $Revision: 2489 $
+##############################################################################
+
+package Perl::Critic::Policy::InputOutput::RequireCheckedOpen;
+
+use 5.006001;
+use strict;
+use warnings;
+use Readonly;
+
+use Perl::Critic::Utils qw{ :severities :classification };
+use base 'Perl::Critic::Policy';
+
+our $VERSION = '1.088';
+
+#-----------------------------------------------------------------------------
+
+Readonly::Scalar my $DESC => q{Return value of "open" ignored};
+Readonly::Scalar my $EXPL => q{Check the return value of "open" for success};
+
+#-----------------------------------------------------------------------------
+
+sub supported_parameters { return () }
+sub default_severity { return $SEVERITY_MEDIUM }
+sub default_themes { return qw( core maintenance ) }
+sub applies_to { return 'PPI::Token::Word' }
+
+#-----------------------------------------------------------------------------
+
+sub violates {
+ my ( $self, $elem, undef ) = @_;
+
+ return if $elem ne 'open';
+ return if ! is_unchecked_call( $elem );
+
+ return $self->violation( $DESC, $EXPL, $elem );
+
+}
+
+
+1;
+
+__END__
+
+#-----------------------------------------------------------------------------
+
+=pod
+
+=head1 NAME
+
+Perl::Critic::Policy::InputOutput::RequireCheckedOpen - Write C<< my $error = open $fh, $mode, $filename; >> instead of C<< open $fh, $mode, $filename; >>.
+
+=head1 AFFILIATION
+
+This Policy is part of the core L<Perl::Critic> distribution.
+
+
+=head1 DESCRIPTION
+
+The perl builtin I/O function C<open> returns a false value on failure. That
+value should always be checked to ensure that the open was successful.
+
+
+ my $error = open( $filehandle, $mode, $filename ); # ok
+ open( $filehandle, $mode, $filename ) or die "unable to open: $!"; # ok
+ open( $filehandle, $mode, $filename ); # not ok
+
+
+=head1 CONFIGURATION
+
+This Policy is not configurable except for the standard options.
+
+
+=head1 AUTHOR
+
+Andrew Moore <amoore@mooresystems.com>
+
+=head1 ACKNOWLEDGMENTS
+
+This policy module is based heavily on policies written by Jeffrey Ryan
+Thalhammer <thaljef@cpan.org>.
+
+=head1 COPYRIGHT
+
+Copyright (c) 2007-2008 Andrew Moore. All rights reserved.
+
+This program is free software; you can redistribute it and/or modify
+it under the same terms as Perl itself. The full text of this license
+can be found in the LICENSE file included with this module.
+
+=cut
+
+##############################################################################
+# Local Variables:
+# mode: cperl
+# cperl-indent-level: 4
+# fill-column: 78
+# indent-tabs-mode: nil
+# c-indentation-style: bsd
+# End:
+# ex: set ts=8 sts=4 sw=4 tw=78 ft=perl expandtab shiftround :