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+<title>Debugging with GDB: Arguments</title>
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+<a name="Arguments"></a>
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+<p>
+Next: <a href="Environment.html#Environment" accesskey="n" rel="next">Environment</a>, Previous: <a href="Starting.html#Starting" accesskey="p" rel="previous">Starting</a>, Up: <a href="Running.html#Running" accesskey="u" rel="up">Running</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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+<hr>
+<a name="Your-Program_0027s-Arguments"></a>
+<h3 class="section">4.3 Your Program&rsquo;s Arguments</h3>
+
+<a name="index-arguments-_0028to-your-program_0029"></a>
+<p>The arguments to your program can be specified by the arguments of the
+<code>run</code> command.
+They are passed to a shell, which expands wildcard characters and
+performs redirection of I/O, and thence to your program. Your
+<code>SHELL</code> environment variable (if it exists) specifies what shell
+<small>GDB</small> uses. If you do not define <code>SHELL</code>, <small>GDB</small> uses
+the default shell (<samp>/bin/sh</samp> on Unix).
+</p>
+<p>On non-Unix systems, the program is usually invoked directly by
+<small>GDB</small>, which emulates I/O redirection via the appropriate system
+calls, and the wildcard characters are expanded by the startup code of
+the program, not by the shell.
+</p>
+<p><code>run</code> with no arguments uses the same arguments used by the previous
+<code>run</code>, or those set by the <code>set args</code> command.
+</p>
+<dl compact="compact">
+<dd><a name="index-set-args"></a>
+</dd>
+<dt><code>set args</code></dt>
+<dd><p>Specify the arguments to be used the next time your program is run. If
+<code>set args</code> has no arguments, <code>run</code> executes your program
+with no arguments. Once you have run your program with arguments,
+using <code>set args</code> before the next <code>run</code> is the only way to run
+it again without arguments.
+</p>
+<a name="index-show-args"></a>
+</dd>
+<dt><code>show args</code></dt>
+<dd><p>Show the arguments to give your program when it is started.
+</p></dd>
+</dl>
+
+
+
+
+</body>
+</html>