1<html lang="en"> 2<head> 3<title>Signaling - 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="Altering.html#Altering" title="Altering"> 9<link rel="prev" href="Jumping.html#Jumping" title="Jumping"> 10<link rel="next" href="Returning.html#Returning" title="Returning"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<!-- 13Copyright (C) 1988-2013 Free Software Foundation, Inc. 14 15Permission is granted to copy, distribute and/or modify this document 16under the terms of the GNU Free Documentation License, Version 1.3 or 17any later version published by the Free Software Foundation; with the 18Invariant Sections being ``Free Software'' and ``Free Software Needs 19Free Documentation'', with the Front-Cover Texts being ``A GNU Manual,'' 20and with the Back-Cover Texts as in (a) below. 21 22(a) The FSF's Back-Cover Text is: ``You are free to copy and modify 23this GNU Manual. Buying copies from GNU Press supports the FSF in 24developing GNU and promoting software freedom.'' 25--> 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="Signaling"></a> 43<p> 44Next: <a rel="next" accesskey="n" href="Returning.html#Returning">Returning</a>, 45Previous: <a rel="previous" accesskey="p" href="Jumping.html#Jumping">Jumping</a>, 46Up: <a rel="up" accesskey="u" href="Altering.html#Altering">Altering</a> 47<hr> 48</div> 49 50<h3 class="section">17.3 Giving your Program a Signal</h3> 51 52<p><a name="index-deliver-a-signal-to-a-program-1037"></a> 53 54<a name="index-signal-1038"></a> 55<dl><dt><code>signal </code><var>signal</var><dd>Resume execution where your program stopped, but immediately give it the 56signal <var>signal</var>. <var>signal</var> can be the name or the number of a 57signal. For example, on many systems <code>signal 2</code> and <code>signal 58SIGINT</code> are both ways of sending an interrupt signal. 59 60 <p>Alternatively, if <var>signal</var> is zero, continue execution without 61giving a signal. This is useful when your program stopped on account of 62a signal and would ordinarily see the signal when resumed with the 63<code>continue</code> command; ‘<samp><span class="samp">signal 0</span></samp>’ causes it to resume without a 64signal. 65 66 <p><code>signal</code> does not repeat when you press <RET> a second time 67after executing the command. 68</dl> 69 <!-- @end group --> 70 71 <p>Invoking the <code>signal</code> command is not the same as invoking the 72<code>kill</code> utility from the shell. Sending a signal with <code>kill</code> 73causes <span class="sc">gdb</span> to decide what to do with the signal depending on 74the signal handling tables (see <a href="Signals.html#Signals">Signals</a>). The <code>signal</code> command 75passes the signal directly to your program. 76 77 </body></html> 78 79