Perl::Critic::Policy::InputOutput::RequireCheckedOpen - Write my $error = open $fh, $mode, $filename; instead of open $fh, $mode, $filename;.
my $error = open $fh, $mode, $filename;
open $fh, $mode, $filename;
This Policy is part of the core Perl::Critic distribution.
The perl builtin I/O function 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
open $filehandle, $mode, $filename; # ok
You can use autodie, Fatal, or Fatal::Exception to get around this. Currently, autodie is not properly treated as a pragma; its lexical effects aren't taken into account.
If you create a module that exports autodie you can tell this policy about it with the autodie_modules setting:
autodie_modules = My::Thing
Andrew Moore <email@example.com>
This policy module is based heavily on policies written by Jeffrey Ryan Thalhammer <firstname.lastname@example.org>.
Copyright (c) 2007-2011 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.
To install Perl::Critic, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell
For more information on module installation, please visit the detailed CPAN module installation guide.