no lib q{.}; # mitigate the ". in @INC" security threat vector
             # when using optional dependencies

[download]

Well,if you talk security, you should use -T anyways. See perlrun and perlsec for "Taint mode", which implies "." not being included in @INC.

As a (weaker) alternative, you could localize @INC in your eval block: 

@ARGV = Win32::CommandLine::argv() if eval {
    local @INC = grep !/^\.$/, @INC; # LHS is localized, RHS gets glob
+al @INC
    require Win32::CommandLine;
};

[download]

This localized restriction then applies to all modules loaded by Win32::CommandLine as well, but not to subsequent code in your script-foo.pl.

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In reply to Re: Mitigating ". in @INC" for optional dependencies by shmem
in thread Mitigating ". in @INC" for optional dependencies by Wyrdweaver

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.