perl::critic::policy::inputoutput::requirecheckedopen(3) [centos man page]

Perl::Critic::Policy::InputOutput::RequireCheckedOpen(3)User Contributed Perl DocumentatioPerl::Critic::Policy::InputOutput::RequireCheckedOpen(3)

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

       This Policy is not configurable except for the standard options.

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 v5.16.3							    2014-06-09		  Perl::Critic::Policy::InputOutput::RequireCheckedOpen(3)

Perl::Critic::Policy::InputOutput::RequireCheckedSyscallUser Contributed Perl DocumentPerl::Critic::Policy::InputOutput::RequireCheckedSyscalls(3)

NAME

       Perl::Critic::Policy::InputOutput::RequireCheckedSyscalls - Return value of flagged function ignored.

AFFILIATION

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

DESCRIPTION

       This performs identically to InputOutput::RequireCheckedOpen/Close except that this is configurable to apply to any function, whether core
       or user-defined.

       If your module uses Fatal, Fatal::Exception, or autodie then any functions wrapped by those modules will not trigger this policy.  For
       example:

	   use Fatal qw(open);
	   open my $fh, $filename;  # no violation
	   close $fh;		    # yes violation

	   use autodie;
	   open $filehandle, $mode, $filename;	 # no violation

       Currently, autodie is not properly treated as a pragma; its lexical effects aren't taken into account.

CONFIGURATION

       This policy watches for a configurable list of function names.  By default, it applies to "open", "print", "say" and "close".  You can
       override this to set it to a different list of functions with the "functions" and "exclude_functions" settings.	To do this, put entries in
       a .perlcriticrc file like this:

	   [InputOutput::RequireCheckedSyscalls]
	   functions = open opendir read readline readdir close closedir

       We have defined a few shortcuts for creating this list

	   [InputOutput::RequireCheckedSyscalls]
	   functions = :defaults opendir readdir closedir

	   [InputOutput::RequireCheckedSyscalls]
	   functions = :builtins

	   [InputOutput::RequireCheckedSyscalls]
	   functions = :all

       The ":builtins" shortcut above represents all of the builtin functions that have error conditions (about 65 of them, many of them rather
       obscure).

       You can require checking all builtins except "print" by combining the "functions" and "exclude_functions":

	   [InputOutput::RequireCheckedSyscalls]
	   functions = :builtins
	   exclude_functions = print

       This is a lot easier to read than the alternative.

       The ":all" is the insane case: you must check the return value of EVERY function call, even "return" and "exit".  Yes, this "feature" is
       overkill and is wasting CPU cycles on your computer by just existing.  Nyah nyah.  I shouldn't code after midnight.

CREDITS

       Initial development of this policy was supported by a grant from the Perl Foundation.

       This policy module is based heavily on policies written by Andrew Moore <amoore@mooresystems.com>.

AUTHOR

       Chris Dolan <cdolan@cpan.org>

COPYRIGHT

       Copyright (c) 2007-2011 Chris Dolan.  Many 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 v5.16.3							    2014-06-09	      Perl::Critic::Policy::InputOutput::RequireCheckedSyscalls(3)