NAME

       Perl::Critic::Policy::InputOutput::RequireCheckedOpen - Write "my $error = open $fh,
       $mode, $filename;" instead of "open $fh, $mode, $filename;".

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       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.

CONFIGURATION

       If you create a module that exports "autodie" you can tell this policy about it with the
       "autodie_modules" setting:

           [InputOutput::RequireCheckedSyscalls]
           autodie_modules = My::Thing

AUTHOR

       Andrew Moore <amoore@mooresystems.com>

ACKNOWLEDGMENTS

       This policy module is based heavily on policies written by Jeffrey Ryan Thalhammer
       <jeff@imaginative-software.com>.

COPYRIGHT

       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.

perl v5.24.1                           Perl::Critic::Policy::InputOutput::RequireCheckedOpen(3pm)