in reply to Re^4: use re 'taint' with s/// operator
in thread use re 'taint' with s/// operator

"Untainting" variables just means assigning an untainted value to it.
Hint. It's the value that tainted, not the variable.
Hint. If I write untainted value, I know.

Hint: Look back. You'll see that you were the first & only one to mention "Untainting" variables.

As for your "Really? In Perl land, there isn't such a thing as "untainting"., I guess you'd best re-read perlsec:

The lesson is that when untainting, you must be exceedingly careful with your patterns. Laundering data using regular expression is the only mechanism for untainting dirty data, ...
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
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In the absence of evidence, opinion is indistinguishable from prejudice.
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  • Comment on Re^5: use re 'taint' with s/// operator

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Re^6: use re 'taint' with s/// operator
by JavaFan (Canon) on Nov 19, 2010 at 21:29 UTC
    perlsec is wrong.
[reply]

      I look forward to the publication of the JavaFan authorised revision :)

[reply]
        $ perl -TMScalar::Util=tainted -wE '$x = $0; say tainted $x; ($x) = ke
+ys %{{$x => 1}}; say tainted $x'
1
0
$ perl -TMScalar::Util=tainted -wE '$x = $0; say tainted $x; $x = join
+ "", map {chr ord substr $x, $_, 1} 0 .. length($x) - 1; say tainted 
+$x'
1
0
$ perl -TMScalar::Util=tainted -wE '$x = $0; say tainted $x; $x = lc $
+x; say tainted $x'  # May change the case of $x
1
0
$ perl -TMScalar::Util=tainted -wE '$x = $0; say tainted $x; $x = eval
+ qq["${\quotemeta $x}"] or die; say tainted $x'
1
0

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        HTH, HAND, BrowserUk.
[reply]
[d/l]

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