80 lines
3.6 KiB
HTML
80 lines
3.6 KiB
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<title>Arguments - Debugging with GDB</title>
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<div class="node">
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<a name="Arguments"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Environment.html#Environment">Environment</a>,
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Previous: <a rel="previous" accesskey="p" href="Starting.html#Starting">Starting</a>,
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Up: <a rel="up" accesskey="u" href="Running.html#Running">Running</a>
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<hr>
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</div>
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<h3 class="section">4.3 Your Program's Arguments</h3>
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<p><a name="index-arguments-_0028to-your-program_0029-126"></a>The arguments to your program can be specified by the arguments of the
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<code>run</code> command.
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They are passed to a shell, which expands wildcard characters and
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performs redirection of I/O, and thence to your program. Your
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<code>SHELL</code> environment variable (if it exists) specifies what shell
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<span class="sc">gdb</span> uses. If you do not define <code>SHELL</code>, <span class="sc">gdb</span> uses
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the default shell (<samp><span class="file">/bin/sh</span></samp> on Unix).
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<p>On non-Unix systems, the program is usually invoked directly by
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<span class="sc">gdb</span>, which emulates I/O redirection via the appropriate system
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calls, and the wildcard characters are expanded by the startup code of
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the program, not by the shell.
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<p><code>run</code> with no arguments uses the same arguments used by the previous
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<code>run</code>, or those set by the <code>set args</code> command.
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<a name="index-set-args-127"></a>
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<dl><dt><code>set args</code><dd>Specify the arguments to be used the next time your program is run. If
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<code>set args</code> has no arguments, <code>run</code> executes your program
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with no arguments. Once you have run your program with arguments,
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using <code>set args</code> before the next <code>run</code> is the only way to run
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it again without arguments.
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<p><a name="index-show-args-128"></a><br><dt><code>show args</code><dd>Show the arguments to give your program when it is started.
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</dl>
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</body></html>
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