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    <p>ban, I don't think what you are trying to do will work. The <code>/dev/fd/0</code> handle is different for each process (when you open it you basically make a copy/dup of the <code>fh</code> inherited by the parent process), so the file handle you open in perl will NOT be the same as for your bash.</p> <p>I believe you have (at least) two options here, though:</p> <ol> <li>Read your commands with the <code>while( &lt;STDIN&gt; )</code> approach, then store them to your file AND pass them to <code>system()</code>or <code>$qx()</code> to be executed by a shell, however, since this starts a shell for every command this only works for simple applications. You could work around this by opening a shell in a sub-child and connecting its STDIN/STDOUT filehandles with perl file handles you pipe new commands on and read out their input, though. See <code>perldoc perlopentut</code> (section Pipe Opens) and/or <code>IPC::Open2</code> (<a href="http://search.cpan.org/~rjbs/perl-5.18.0/ext/IPC-Open3/lib/IPC/Open2.pm" rel="nofollow">http://search.cpan.org/~rjbs/perl-5.18.0/ext/IPC-Open3/lib/IPC/Open2.pm</a>) for details. Combined with <code>Term::ReadLine</code> you can emulate the full input method of a shell and won't notice much of a difference, while logging all commands.</li> <li>Is there any reason why you don't just use <strong>bash's history feature</strong> (see for instance here: <a href="http://www.talug.org/events/20030709/cmdline_history.html" rel="nofollow">http://www.talug.org/events/20030709/cmdline_history.html</a>). By default every command you execute in an interactive session should be recorded in <code>~/.bash_history</code>, and you can access it with `history.</li> </ol> <p>If your application is security related, and you are trying to log everything that for instance <code>root</code> does on a system, then you might want to look into <code>sudo</code>, also.</p> <p>Hope this helps you, Christian</p>
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    1. COHello Christian, thanks for the reply. The application is not security related but what I am doing is to keep reading all the files which get executed and then when a certain line is found, I want to execute something else before it.
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