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    <p>It's probably not working since you're not replacing things like <code>$ZIP_DEBUG</code> with their equivalent <em>real</em> values. Within Perl, they will be replaced with the values of the variables <em>before</em> being passed to the <code>system</code> call.</p> <p>If you print out those Perl variables (or even the entire command) before you execute that <code>system</code> call, you'll find out those real values that you need to use. You can use the following transcript to guide you:</p> <pre><code>$ perl -e ' &gt; $ZIP_DEBUG = "xyzzy"; &gt; $include = "inc_files"; &gt; $exclude = "exc_files"; &gt; print "zip $ZIP_DEBUG -r -9 itvlib.zip $include $exclude"; &gt; ' zip xyzzy -r -9 itvlib.zip inc_files exc_files </code></pre> <p>For details on how <code>system</code> works, see <a href="http://perldoc.perl.org/functions/system.html" rel="nofollow">here</a>. For details on what <code>zip</code> needs to function, you should just be able to run:</p> <pre><code>man zip </code></pre> <p>from a command line shell (assuming you're on Linux or its brethren). If, instead, you're on a different operating system (like Windows), you'll have to figure out how to get the zip options out. This <em>may</em> well be as simple as <code>zip -?</code> of <code>zip -h</code> but there's no guarantee that will work.</p> <p>If it's the same as the Info-ZIP <code>zip</code> under Linux (and it may be if you have the <code>-9</code> and <code>-r</code> options and your <code>exclude</code> variable starts with <code>-x</code>), then <code>zip -h</code> will get you basic help and <code>zip -h2</code> will give you a lot more.</p>
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    1. POHow is this zip command being used in perl?
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    1. COexactly sir, zip -? or zip -h doesn't work. I just wish to see the gory details of this zip command which has been used here, i am looking where i can find it.
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    2. CO@drunkMonk, that depends entirely on who made it. If `zip -?` (or other variants) don't work, try `zip` without any arguments. The default may be to offer help, or at least show how you can get help. Failing that, find the documentation for your particular `zip` program. I'm pretty certain it doesn't come standard with Windows so you must have gotten it from somewhere else.
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    3. COyou are right .. its using third party zip exe. :)
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