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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_spawnattr_getpgroup</title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="posix_spawnattr_getpgroup"></a> <a name="tag_03_434"></a><!-- posix_spawnattr_getpgroup --> <!--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_434_01"></a>NAME</h4><blockquote>posix_spawnattr_getpgroup, posix_spawnattr_setpgroup - get and set the spawn-pgroup attribute of a spawn attributesobject (<b>ADVANCED REALTIME</b>)</blockquote><h4><a name="tag_03_434_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_spawnattr_getpgroup(const posix_spawnattr_t *restrict</tt> <i>attr</i><tt>,<br> pid_t *restrict</tt> <i>pgroup</i><tt>);<br> int posix_spawnattr_setpgroup(posix_spawnattr_t *</tt><i>attr</i><tt>, pid_t</tt> <i>pgroup</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_434_03"></a>DESCRIPTION</h4><blockquote><p>The <i>posix_spawnattr_getpgroup</i>() function shall obtain the value of the <i>spawn-pgroup</i> attribute from the attributesobject referenced by <i>attr</i>.</p><p>The <i>posix_spawnattr_setpgroup</i>() function shall set the <i>spawn-pgroup</i> attribute in an initialized attributes objectreferenced by <i>attr</i>.</p><p>The <i>spawn-pgroup</i> attribute represents the process group to be joined by the new process image in a spawn operation (ifPOSIX_SPAWN_SETPGROUP is set in the <i>spawn-flags</i> attribute). The default value of this attribute shall be zero.</p></blockquote><h4><a name="tag_03_434_04"></a>RETURN VALUE</h4><blockquote><p>Upon successful completion, <i>posix_spawnattr_getpgroup</i>() shall return zero and store the value of the <i>spawn-pgroup</i>attribute of <i>attr</i> into the object referenced by the <i>pgroup</i> parameter; otherwise, an error number shall be returned toindicate the error.</p><p>Upon successful completion, <i>posix_spawnattr_setpgroup</i>() shall return zero; otherwise, an error number shall be returnedto indicate the error.</p></blockquote><h4><a name="tag_03_434_05"></a>ERRORS</h4><blockquote><p>These functions may fail if:</p><dl compact><dt>[EINVAL]</dt><dd>The value specified by <i>attr</i> is invalid.</dd></dl><p>The <i>posix_spawnattr_setpgroup</i>() function may fail if:</p><dl compact><dt>[EINVAL]</dt><dd>The value of the attribute being set is not valid.</dd></dl></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_03_434_06"></a>EXAMPLES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_434_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_434_08"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_434_09"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_434_10"></a>SEE ALSO</h4><blockquote><p><a href="posix_spawn.html"><i>posix_spawn</i>()</a> , <a href="posix_spawnattr_destroy.html"><i>posix_spawnattr_destroy</i>()</a> , <a href="posix_spawnattr_init.html"><i>posix_spawnattr_init</i>()</a> , <a href="posix_spawnattr_getsigdefault.html"><i>posix_spawnattr_getsigdefault</i>()</a> , <a href="posix_spawnattr_getflags.html"><i>posix_spawnattr_getflags</i>()</a> , <a href="posix_spawnattr_getschedparam.html"><i>posix_spawnattr_getschedparam</i>()</a> , <a href="posix_spawnattr_getschedpolicy.html"><i>posix_spawnattr_getschedpolicy</i>()</a> , <a href="posix_spawnattr_getsigmask.html"><i>posix_spawnattr_getsigmask</i>()</a> , <a href="posix_spawnattr_setsigdefault.html"><i>posix_spawnattr_setsigdefault</i>()</a> , <a href="posix_spawnattr_setflags.html"><i>posix_spawnattr_setflags</i>()</a> , <a href="posix_spawnattr_setschedparam.html"><i>posix_spawnattr_setschedparam</i>()</a> , <a href="posix_spawnattr_setschedpolicy.html"><i>posix_spawnattr_setschedpolicy</i>()</a> , <a href="posix_spawnattr_setsigmask.html"><i>posix_spawnattr_setsigmask</i>()</a> , <a href="posix_spawnp.html"><i>posix_spawnp</i>()</a> ,the Base Definitions 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_434_11"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 6. Derived from IEEE Std 1003.1d-1999.</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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