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17<title>Debugging with GDB: Editing</title>
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64<a name="Editing"></a>
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66<p>
67Next: <a href="Command-History.html#Command-History" accesskey="n" rel="next">Command History</a>, Previous: <a href="Prompt.html#Prompt" accesskey="p" rel="previous">Prompt</a>, Up: <a href="Controlling-GDB.html#Controlling-GDB" accesskey="u" rel="up">Controlling GDB</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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70<a name="Command-Editing"></a>
71<h3 class="section">22.2 Command Editing</h3>
72<a name="index-readline"></a>
73<a name="index-command-line-editing"></a>
74
75<p><small>GDB</small> reads its input commands via the <em>Readline</em> interface.  This
76<small>GNU</small> library provides consistent behavior for programs which provide a
77command line interface to the user.  Advantages are <small>GNU</small> Emacs-style
78or <em>vi</em>-style inline editing of commands, <code>csh</code>-like history
79substitution, and a storage and recall of command history across
80debugging sessions.
81</p>
82<p>You may control the behavior of command line editing in <small>GDB</small> with the
83command <code>set</code>.
84</p>
85<dl compact="compact">
86<dd><a name="index-set-editing"></a>
87<a name="index-editing"></a>
88</dd>
89<dt><code>set editing</code></dt>
90<dt><code>set editing on</code></dt>
91<dd><p>Enable command line editing (enabled by default).
92</p>
93</dd>
94<dt><code>set editing off</code></dt>
95<dd><p>Disable command line editing.
96</p>
97<a name="index-show-editing"></a>
98</dd>
99<dt><code>show editing</code></dt>
100<dd><p>Show whether command line editing is enabled.
101</p></dd>
102</dl>
103
104<p>See <a href="Command-Line-Editing.html#Command-Line-Editing">Command Line Editing</a>,
105for more details about the Readline
106interface.  Users unfamiliar with <small>GNU</small> Emacs or <code>vi</code> are
107encouraged to read that chapter.
108</p>
109<a name="index-Readline-application-name"></a>
110<p><small>GDB</small> sets the Readline application name to &lsquo;<samp>gdb</samp>&rsquo;.  This
111is useful for conditions in <samp>.inputrc</samp>.
112</p>
113<a name="index-operate_002dand_002dget_002dnext"></a>
114<p><small>GDB</small> defines a bindable Readline command,
115<code>operate-and-get-next</code>.  This is bound to <kbd>C-o</kbd> by default.
116This command accepts the current line for execution and fetches the
117next line relative to the current line from the history for editing.
118Any argument is ignored.
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