Perl::Critic::Policy::InputOutput::RequireCheckedOpen − Write "my $error = open $fh, $mode, $filename;" instead of "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 use autodie; 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.
This Policy is not configurable except for the standard options.
Andrew Moore <amoore AT mooresystems DOT com>
This policy module is based heavily on policies written by Jeffrey Ryan Thalhammer <jeff@imaginative−software.com>.
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.