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    <p>It is designed to set your module search path. Specifically, it sets the default location (first location checked) the user's local <code>perl/</code> directory. It not only adds that directory but makes it a new root for <code>@INC</code>. <strong>It does this for every entry in @INC.</strong> In a limited access environment such as those that use CPanel this insures you scripts (general cgi) user your modules over any other.</p> <p>BEGIN means it occurs before any code not in the block.</p> <p>The first line determines if <code>/home/root/perl</code> exists and is a directory. If both are true it assigns that to <code>$base_module_dir</code>, otherwise it assigns <code>&lt;user home&gt;/perl/</code> to the variable. Remember, in perl you can index a function call directly if it returns a list.</p> <p>It finds the user's home directory with <code>getpwuid($&gt;)</code>. <code>getpwuid()</code> gets user account information for a given user (generally from passwd on a Unix system) and returns it as a list. <code>$&gt;</code> is the effective user id of the script. The reason for the index of 7 is that is the location of the home directory in the list (and it is the 8th field in passwd if memory serves).</p> <p>It then prepends ALL entries in <code>@INC</code> with <code>$base_module_dir</code> and inserts those modified entries at the front of <code>@INC</code>. So it's not just adding <code>$base_module_dir</code> as a directory but is adding that as a new root for all entries in <code>@INC</code>. That's why it uses <code>map</code> instead of just adding a single entry.</p>
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    1. POWhat does this Perl code do?
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    1. COAh, right. I've deleted my response since I missed the effects of the map. Thanks for pointing that out. +1 to HerbN
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    2. COwhat about this piece? "( getpwuid($>) )[7]" I don't understand the $> and the array ref (?) to [7]
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