NAME

Perl::Critic::Policy::Community::OpenArgs - Always use the three-argument form of open

DESCRIPTION

The open() function may be called in a two-argument form where the filename is parsed to determine the mode of opening, which may include piping input or output. (In the one-argument form, this filename is retrieved from a global variable, but the same magic is used.) This can lead to vulnerabilities if the filename is retrieved from user input or could begin or end with a special character. The three-argument form specifies the open mode as the second argument, so it is always distinct from the filename.

open FILE;                   # not ok
open my $fh, "<$filename";   # not ok
open my $fh, '<', $filename; # ok

This policy is similar to the core policy Perl::Critic::Policy::InputOutput::ProhibitTwoArgOpen, but additionally prohibits one-argument opens.

AFFILIATION

This policy is part of Perl::Critic::Community.

CONFIGURATION

This policy is not configurable except for the standard options.

AUTHOR

Dan Book, dbook@cpan.org

COPYRIGHT AND LICENSE

Copyright 2015, Dan Book.

This library is free software; you may redistribute it and/or modify it under the terms of the Artistic License version 2.0.

SEE ALSO

Perl::Critic