1<html lang="en"> 2<head> 3<title>Event Designators - Debugging with GDB</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Debugging with GDB"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="History-Interaction.html#History-Interaction" title="History Interaction"> 9<link rel="next" href="Word-Designators.html#Word-Designators" title="Word Designators"> 10<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 11<!-- 12Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 131998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 14Free Software Foundation, Inc. 15 16Permission is granted to copy, distribute and/or modify this document 17under the terms of the GNU Free Documentation License, Version 1.3 or 18any later version published by the Free Software Foundation; with the 19Invariant Sections being ``Free Software'' and ``Free Software Needs 20Free Documentation'', with the Front-Cover Texts being ``A GNU Manual,'' 21and with the Back-Cover Texts as in (a) below. 22 23(a) The FSF's Back-Cover Text is: ``You are free to copy and modify 24this GNU Manual. Buying copies from GNU Press supports the FSF in 25developing GNU and promoting software freedom.''--> 26<meta http-equiv="Content-Style-Type" content="text/css"> 27<style type="text/css"><!-- 28 pre.display { font-family:inherit } 29 pre.format { font-family:inherit } 30 pre.smalldisplay { font-family:inherit; font-size:smaller } 31 pre.smallformat { font-family:inherit; font-size:smaller } 32 pre.smallexample { font-size:smaller } 33 pre.smalllisp { font-size:smaller } 34 span.sc { font-variant:small-caps } 35 span.roman { font-family:serif; font-weight:normal; } 36 span.sansserif { font-family:sans-serif; font-weight:normal; } 37--></style> 38<link rel="stylesheet" type="text/css" href="../cs.css"> 39</head> 40<body> 41<div class="node"> 42<a name="Event-Designators"></a> 43<p> 44Next: <a rel="next" accesskey="n" href="Word-Designators.html#Word-Designators">Word Designators</a>, 45Up: <a rel="up" accesskey="u" href="History-Interaction.html#History-Interaction">History Interaction</a> 46<hr> 47</div> 48 49<h4 class="subsection">32.1.1 Event Designators</h4> 50 51<p><a name="index-event-designators-2290"></a> 52An event designator is a reference to a command line entry in the 53history list. 54<a name="index-history-events-2291"></a> 55 <dl> 56<dt><code>!</code><dd>Start a history substitution, except when followed by a space, tab, 57the end of the line, or ‘<samp><span class="samp">=</span></samp>’. 58 59 <br><dt><code>!</code><var>n</var><dd>Refer to command line <var>n</var>. 60 61 <br><dt><code>!-</code><var>n</var><dd>Refer to the command <var>n</var> lines back. 62 63 <br><dt><code>!!</code><dd>Refer to the previous command. This is a synonym for ‘<samp><span class="samp">!-1</span></samp>’. 64 65 <br><dt><code>!</code><var>string</var><dd>Refer to the most recent command starting with <var>string</var>. 66 67 <br><dt><code>!?</code><var>string</var><code>[?]</code><dd>Refer to the most recent command containing <var>string</var>. The trailing 68‘<samp><span class="samp">?</span></samp>’ may be omitted if the <var>string</var> is followed immediately by 69a newline. 70 71 <br><dt><code>^</code><var>string1</var><code>^</code><var>string2</var><code>^</code><dd>Quick Substitution. Repeat the last command, replacing <var>string1</var> 72with <var>string2</var>. Equivalent to 73<code>!!:s/</code><var>string1</var><code>/</code><var>string2</var><code>/</code>. 74 75 <br><dt><code>!#</code><dd>The entire command line typed so far. 76 77 </dl> 78 79 </body></html> 80 81