| <html lang="en"> |
| <head> |
| <title>Signal Actions - The GNU C Library</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="The GNU C Library"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="Signal-Handling.html#Signal-Handling" title="Signal Handling"> |
| <link rel="prev" href="Standard-Signals.html#Standard-Signals" title="Standard Signals"> |
| <link rel="next" href="Defining-Handlers.html#Defining-Handlers" title="Defining Handlers"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| This file documents the GNU C library. |
| |
| This is Edition 0.12, last updated 2007-10-27, |
| of `The GNU C Library Reference Manual', for version |
| 2.8 (Sourcery G++ Lite 2011.03-41). |
| |
| Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, |
| 2003, 2007, 2008, 2010 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 or |
| any later version published by the Free Software Foundation; with the |
| Invariant Sections being ``Free Software Needs Free Documentation'' |
| and ``GNU Lesser General Public License'', the Front-Cover texts being |
| ``A GNU Manual'', and with the Back-Cover Texts as in (a) below. A |
| copy of the license is included in the section entitled "GNU Free |
| Documentation License". |
| |
| (a) The FSF's Back-Cover Text is: ``You have the freedom to |
| copy and modify this GNU manual. Buying copies from the FSF |
| supports it in developing GNU and promoting software freedom.''--> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| <link rel="stylesheet" type="text/css" href="../cs.css"> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="Signal-Actions"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="Defining-Handlers.html#Defining-Handlers">Defining Handlers</a>, |
| Previous: <a rel="previous" accesskey="p" href="Standard-Signals.html#Standard-Signals">Standard Signals</a>, |
| Up: <a rel="up" accesskey="u" href="Signal-Handling.html#Signal-Handling">Signal Handling</a> |
| <hr> |
| </div> |
| |
| <h3 class="section">24.3 Specifying Signal Actions</h3> |
| |
| <p><a name="index-signal-actions-2905"></a><a name="index-establishing-a-handler-2906"></a> |
| The simplest way to change the action for a signal is to use the |
| <code>signal</code> function. You can specify a built-in action (such as to |
| ignore the signal), or you can <dfn>establish a handler</dfn>. |
| |
| <p>The GNU library also implements the more versatile <code>sigaction</code> |
| facility. This section describes both facilities and gives suggestions |
| on which to use when. |
| |
| <ul class="menu"> |
| <li><a accesskey="1" href="Basic-Signal-Handling.html#Basic-Signal-Handling">Basic Signal Handling</a>: The simple <code>signal</code> function. |
| <li><a accesskey="2" href="Advanced-Signal-Handling.html#Advanced-Signal-Handling">Advanced Signal Handling</a>: The more powerful <code>sigaction</code> function. |
| <li><a accesskey="3" href="Signal-and-Sigaction.html#Signal-and-Sigaction">Signal and Sigaction</a>: How those two functions interact. |
| <li><a accesskey="4" href="Sigaction-Function-Example.html#Sigaction-Function-Example">Sigaction Function Example</a>: An example of using the sigaction function. |
| <li><a accesskey="5" href="Flags-for-Sigaction.html#Flags-for-Sigaction">Flags for Sigaction</a>: Specifying options for signal handling. |
| <li><a accesskey="6" href="Initial-Signal-Actions.html#Initial-Signal-Actions">Initial Signal Actions</a>: How programs inherit signal actions. |
| </ul> |
| |
| </body></html> |
| |
