📄 atexit.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>atexit</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_001_233"> </a>NAME</h4><blockquote>atexit - register a function to run at process termination</blockquote><h4><a name = "tag_000_001_234"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="stdlib.h.html">stdlib.h</a>>int atexit(void (*<i>func</i>)(void));</code></pre></blockquote><h4><a name = "tag_000_001_235"> </a>DESCRIPTION</h4><blockquote>The<i>atexit()</i>function registers the function pointed to by<i>func</i>to be called without arguments. At normal process termination,functions registered by<i>atexit()</i>are called in the reverse order to that in which they were registered.Normal termination occurs either by a call to<i><a href="exit.html">exit()</a></i>or a return from<i>main()</i>.<p>At least 32 functions can be registered with<i>atexit()</i>.<p>After a successful call to any of the<i>exec</i>functions, anyfunctions previously registered by<i>atexit()</i>are no longer registered.</blockquote><h4><a name = "tag_000_001_236"> </a>RETURN VALUE</h4><blockquote>Upon successful completion,<i>atexit()</i>returns 0. Otherwise, it returns a non-zero value.</blockquote><h4><a name = "tag_000_001_237"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_001_238"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_001_239"> </a>APPLICATION USAGE</h4><blockquote>The functions registered by a call to<i>atexit()</i>must return to ensure that all registered functions are called.<p>The application should call<i><a href="sysconf.html">sysconf()</a></i>to obtain the value of {ATEXIT_MAX}, the number of functions that can beregistered. There is no way for an application to tell how many functionshave already been registered with<i>atexit()</i>.</blockquote><h4><a name = "tag_000_001_240"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_001_241"> </a>SEE ALSO</h4><blockquote><i><a href="exit.html">exit()</a></i>,<i><a href="sysconf.html">sysconf()</a></i>,<i><a href="stdlib.h.html"><stdlib.h></a></i>.</blockquote><h4>DERIVATION</h4><blockquote>Derived from the ANSI C standard.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -