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<title>Debugging with GDB: Prompting</title>
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<a name="Prompting"></a>
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<p>
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Next: <a href="Errors.html#Errors" accesskey="n" rel="next">Errors</a>, Previous: <a href="Server-Prefix.html#Server-Prefix" accesskey="p" rel="previous">Server Prefix</a>, Up: <a href="Annotations.html#Annotations" accesskey="u" rel="up">Annotations</a> [<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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<a name="Annotation-for-GDB-Input"></a>
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<h3 class="section">28.3 Annotation for <small>GDB</small> Input</h3>
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<a name="index-annotations-for-prompts"></a>
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<p>When <small>GDB</small> prompts for input, it annotates this fact so it is possible
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to know when to send output, when the output from a given command is
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over, etc.
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</p>
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<p>Different kinds of input each have a different <em>input type</em>. Each
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input type has three annotations: a <code>pre-</code> annotation, which
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denotes the beginning of any prompt which is being output, a plain
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annotation, which denotes the end of the prompt, and then a <code>post-</code>
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annotation which denotes the end of any echo which may (or may not) be
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associated with the input. For example, the <code>prompt</code> input type
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features the following annotations:
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</p>
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<div class="smallexample">
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<pre class="smallexample">^Z^Zpre-prompt
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^Z^Zprompt
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^Z^Zpost-prompt
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</pre></div>
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<p>The input types are
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</p>
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<dl compact="compact">
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<dd><a name="index-pre_002dprompt-annotation"></a>
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<a name="index-prompt-annotation"></a>
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<a name="index-post_002dprompt-annotation"></a>
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</dd>
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<dt><code>prompt</code></dt>
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<dd><p>When <small>GDB</small> is prompting for a command (the main <small>GDB</small> prompt).
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</p>
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<a name="index-pre_002dcommands-annotation"></a>
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<a name="index-commands-annotation"></a>
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<a name="index-post_002dcommands-annotation"></a>
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</dd>
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<dt><code>commands</code></dt>
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<dd><p>When <small>GDB</small> prompts for a set of commands, like in the <code>commands</code>
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command. The annotations are repeated for each command which is input.
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</p>
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<a name="index-pre_002doverload_002dchoice-annotation"></a>
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<a name="index-overload_002dchoice-annotation"></a>
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<a name="index-post_002doverload_002dchoice-annotation"></a>
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</dd>
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<dt><code>overload-choice</code></dt>
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<dd><p>When <small>GDB</small> wants the user to select between various overloaded functions.
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</p>
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<a name="index-pre_002dquery-annotation"></a>
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<a name="index-query-annotation"></a>
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<a name="index-post_002dquery-annotation"></a>
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</dd>
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<dt><code>query</code></dt>
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<dd><p>When <small>GDB</small> wants the user to confirm a potentially dangerous operation.
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</p>
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<a name="index-pre_002dprompt_002dfor_002dcontinue-annotation"></a>
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<a name="index-prompt_002dfor_002dcontinue-annotation"></a>
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<a name="index-post_002dprompt_002dfor_002dcontinue-annotation"></a>
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</dd>
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<dt><code>prompt-for-continue</code></dt>
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<dd><p>When <small>GDB</small> is asking the user to press return to continue. Note: Don’t
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expect this to work well; instead use <code>set height 0</code> to disable
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prompting. This is because the counting of lines is buggy in the
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presence of annotations.
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</p></dd>
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