Use 'taint' mode by doing #!/usr/bin/perl -wT

That's almost good advice. Adding Taint Checking can't be done on the shebang line because it is already too late. You need to invoke Perl as perl -T from the command line - see perldoc perlsec. I would argue that you should enable Taint Checking even if you are the only one using the code because things change over time and we are all forgetful without our daily dose of caffeine. I would also say that it is pointless to turn on Taint Checking if you aren't going to take the time to perform "good" untainting regexes and just allow everything through anyway.

Cheers - L~R

Update: Ok, and what I said is almost right. As a a kind monk pointed out to me in a /msg, it does do the "right thing" if it is a CGI or as ./scrip.pl, just not from perl script.pl.

In reply to Re^3: Using a regex pattern from STDIN by Limbic~Region
in thread Using a regex pattern from STDIN by Anonymous Monk

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.