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<a name="Editing"></a>
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<hr>
<a name="Command-Editing"></a>
<h3 class="section">22.2 Command Editing</h3>
<a name="index-readline"></a>
<a name="index-command-line-editing"></a>

<p><small>GDB</small> reads its input commands via the <em>Readline</em> interface.  This
<small>GNU</small> library provides consistent behavior for programs which provide a
command line interface to the user.  Advantages are <small>GNU</small> Emacs-style
or <em>vi</em>-style inline editing of commands, <code>csh</code>-like history
substitution, and a storage and recall of command history across
debugging sessions.
</p>
<p>You may control the behavior of command line editing in <small>GDB</small> with the
command <code>set</code>.
</p>
<dl compact="compact">
<dd><a name="index-set-editing"></a>
<a name="index-editing"></a>
</dd>
<dt><code>set editing</code></dt>
<dt><code>set editing on</code></dt>
<dd><p>Enable command line editing (enabled by default).
</p>
</dd>
<dt><code>set editing off</code></dt>
<dd><p>Disable command line editing.
</p>
<a name="index-show-editing"></a>
</dd>
<dt><code>show editing</code></dt>
<dd><p>Show whether command line editing is enabled.
</p></dd>
</dl>

<p>See <a href="Command-Line-Editing.html#Command-Line-Editing">Command Line Editing</a>,
for more details about the Readline
interface.  Users unfamiliar with <small>GNU</small> Emacs or <code>vi</code> are
encouraged to read that chapter.
</p>
<a name="index-Readline-application-name"></a>
<p><small>GDB</small> sets the Readline application name to &lsquo;<samp>gdb</samp>&rsquo;.  This
is useful for conditions in <samp>.inputrc</samp>.
</p>
<a name="index-operate_002dand_002dget_002dnext"></a>
<p><small>GDB</small> defines a bindable Readline command,
<code>operate-and-get-next</code>.  This is bound to <kbd>C-o</kbd> by default.
This command accepts the current line for execution and fetches the
next line relative to the current line from the history for editing.
Any argument is ignored.
</p>


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