Perl::Critic::Policy::InputOutput::ProhibitBacktickOperators
Backticks are super-convenient, especially for CGI programs, but I find that they make a lot of noise by filling up STDERR with messages when they fail. I think its better to use IPC::Open3 to trap all the output and let the application decide what to do with it.
use IPC::Open3 'open3'; $SIG{CHLD} = 'IGNORE'; @output = `some_command`; #not ok my ($writer, $reader, $err); open3($writer, $reader, $err, 'some_command'); #ok; @output = <$reader>; #Output here @errors = <$err>; #Errors here, instead of the console
This policy also prohibits the generalized form of backticks seen as qx{}.
qx{}
See perlipc for more discussion on using wait() instead of $SIG{CHLD} = 'IGNORE'.
wait()
$SIG{CHLD} = 'IGNORE'
Jeffrey Ryan Thalhammer <thaljef@cpan.org>
Copyright (c) 2005-2006 Jeffrey Ryan Thalhammer. 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.
cpanm
cpanm Perl::Critic
CPAN shell
perl -MCPAN -e shell install Perl::Critic
For more information on module installation, please visit the detailed CPAN module installation guide.