📄 posix_spawn_file_actions_init.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta name="generator" content="HTML Tidy, see www.w3.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 --><!-- Copyright (c) 2001-2003 The Open Group, All Rights Reserved --><title>posix_spawn_file_actions_destroy</title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="posix_spawn_file_actions_destroy"></a> <a name="tag_03_431"></a> <!-- posix_spawn_file_actions_destroy --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2003 Edition<br>Copyright © 2001-2003 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_03_431_01"></a>NAME</h4><blockquote>posix_spawn_file_actions_destroy, posix_spawn_file_actions_init - destroy and initialize spawn file actions object(<b>ADVANCED REALTIME</b>)</blockquote><h4><a name="tag_03_431_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><div class="box"><code><tt><sup>[<a href="javascript:open_code('SPN')">SPN</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> #include <<a href="../basedefs/spawn.h.html">spawn.h</a>><br><br> int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *<br> </tt> <i>file_actions</i><tt>);<br> int posix_spawn_file_actions_init(posix_spawn_file_actions_t *<br> </tt> <i>file_actions</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div><tt><br></tt></blockquote><h4><a name="tag_03_431_03"></a>DESCRIPTION</h4><blockquote><p>The <i>posix_spawn_file_actions_destroy</i>() function shall destroy the object referenced by <i>file_actions</i>; the objectbecomes, in effect, uninitialized. An implementation may cause <i>posix_spawn_file_actions_destroy</i>() to set the objectreferenced by <i>file_actions</i> to an invalid value. A destroyed spawn file actions object can be reinitialized using<i>posix_spawn_file_actions_init</i>(); the results of otherwise referencing the object after it has been destroyed areundefined.</p><p>The <i>posix_spawn_file_actions_init</i>() function shall initialize the object referenced by <i>file_actions</i> to contain nofile actions for <a href="../functions/posix_spawn.html"><i>posix_spawn</i>()</a> or <a href="../functions/posix_spawnp.html"><i>posix_spawnp</i>()</a> to perform.</p><p>A spawn file actions object is as defined in <a href="posix_spawn_file_actions_addclose.html"><i>posix_spawn_file_actions_addclose</i>()</a> .</p><p>The effect of initializing an already initialized spawn file actions object is undefined.</p></blockquote><h4><a name="tag_03_431_04"></a>RETURN VALUE</h4><blockquote><p>Upon successful completion, these functions shall return zero; otherwise, an error number shall be returned to indicate theerror.</p></blockquote><h4><a name="tag_03_431_05"></a>ERRORS</h4><blockquote><p>The <i>posix_spawn_file_actions_init</i>() function shall fail if:</p><dl compact><dt>[ENOMEM]</dt><dd>Insufficient memory exists to initialize the spawn file actions object.</dd></dl><p>The <i>posix_spawn_file_actions_destroy</i>() function may fail if:</p><dl compact><dt>[EINVAL]</dt><dd>The value specified by <i>file_actions</i> is invalid.</dd></dl></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_03_431_06"></a>EXAMPLES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_431_07"></a>APPLICATION USAGE</h4><blockquote><p>These functions are part of the Spawn option and need not be provided on all implementations.</p></blockquote><h4><a name="tag_03_431_08"></a>RATIONALE</h4><blockquote><p>Refer to the RATIONALE in <a href="posix_spawn_file_actions_addclose.html"><i>posix_spawn_file_actions_addclose</i>()</a> .</p></blockquote><h4><a name="tag_03_431_09"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_431_10"></a>SEE ALSO</h4><blockquote><p><a href="posix_spawn.html"><i>posix_spawn</i>()</a> , <a href="posix_spawnp.html"><i>posix_spawnp</i>()</a> , the BaseDefinitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/spawn.h.html"><i><spawn.h></i></a></p></blockquote><h4><a name="tag_03_431_11"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 6. Derived from IEEE Std 1003.1d-1999.</p><p>In the SYNOPSIS, the inclusion of <a href="../basedefs/sys/types.h.html"><i><sys/types.h></i></a> is no longerrequired.</p></blockquote><div class="box"><em>End of informative text.</em></div><hr><hr size="2" noshade><center><font size="2"><!--footer start-->UNIX ® is a registered Trademark of The Open Group.<br>POSIX ® is a registered Trademark of The IEEE.<br>[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href="../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>]</font></center><!--footer end--><hr size="2" noshade></body></html>⌨️ 快捷键说明
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