There has been a lot of talk about people of nefarious nature hiding information in otherwise normal looking images. After hearing about this prospect, I wondered if it was possible to make an image containing runnable perl code. For several days I had trouble getting around the image headers, as they all cause syntax errors. Eventually, Joost showed me the light of the -x switch.
As of now, my user image ktross's user image is a JAPH script, and a picture of a camel.
Steps to run:
- Download ktross's user image, also availible at my home node ktross
- Run perl with the -x switch : perl -x perlmonks.gif
- Enjoy :)
The code contained in the image is a re-run of System Independant Rand-JAPH, but I thought the concept was interesting.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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