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<h3 class="section">22.2 Command Editing</h3>
<p><a name="index-readline-1655"></a><a name="index-command-line-editing-1656"></a>
<span class="sc">gdb</span> reads its input commands via the <dfn>Readline</dfn> interface. This
<span class="sc">gnu</span> library provides consistent behavior for programs which provide a
command line interface to the user. Advantages are <span class="sc">gnu</span> Emacs-style
or <dfn>vi</dfn>-style inline editing of commands, <code>csh</code>-like history
substitution, and a storage and recall of command history across
debugging sessions.
<p>You may control the behavior of command line editing in <span class="sc">gdb</span> with the
command <code>set</code>.
<a name="index-set-editing-1657"></a>
<a name="index-editing-1658"></a>
<dl><dt><code>set editing</code><dt><code>set editing on</code><dd>Enable command line editing (enabled by default).
<br><dt><code>set editing off</code><dd>Disable command line editing.
<p><a name="index-show-editing-1659"></a><br><dt><code>show editing</code><dd>Show whether command line editing is enabled.
</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 <span class="sc">gnu</span> Emacs or <code>vi</code> are
encouraged to read that chapter.
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