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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><utmpx.h></title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="<utmpx.h>"></a> <a name="tag_13_82"></a><!-- <utmpx.h> --> <!--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_13_82_01"></a>NAME</h4><blockquote>utmpx.h - user accounting database definitions</blockquote><h4><a name="tag_13_82_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><div class="box"><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> #include <utmpx.h> <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></div></blockquote><h4><a name="tag_13_82_03"></a>DESCRIPTION</h4><blockquote><p>The <i><utmpx.h></i> header shall define the <b>utmpx</b> structure that shall include at least the following members:</p><pre><tt>char ut_user[] </tt> User login name. <tt>char ut_id[] </tt> Unspecified initialization process identifier. <tt>char ut_line[] </tt> Device name. <tt>pid_t ut_pid </tt> Process ID. <tt>short ut_type </tt> Type of entry. <tt>struct timeval ut_tv </tt> Time entry was made. <tt></tt></pre><p>The <b>pid_t</b> type shall be defined through <b>typedef</b> as described in <a href="sys/types.h.html"><i><sys/types.h></i></a> .</p><p>The <b>timeval</b> structure shall be defined as described in <a href="sys/time.h.html"><i><sys/time.h></i></a> .</p><p>Inclusion of the <i><utmpx.h></i> header may also make visible all symbols from <a href="../basedefs/sys/time.h.html"><i><sys/time.h></i></a>.</p><p>The following symbolic constants shall be defined as possible values for the <i>ut_type</i> member of the <b>utmpx</b>structure:</p><dl compact><dt>EMPTY</dt><dd>No valid user accounting information.</dd><dt>BOOT_TIME</dt><dd>Identifies time of system boot.</dd><dt>OLD_TIME</dt><dd>Identifies time when system clock changed.</dd><dt>NEW_TIME</dt><dd>Identifies time after system clock changed.</dd><dt>USER_PROCESS</dt><dd>Identifies a process.</dd><dt>INIT_PROCESS</dt><dd>Identifies a process spawned by the init process.</dd><dt>LOGIN_PROCESS</dt><dd>Identifies the session leader of a logged-in user.</dd><dt>DEAD_PROCESS</dt><dd>Identifies a session leader who has exited.</dd></dl><p>The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.</p><pre><tt>void endutxent(void);struct utmpx *getutxent(void);struct utmpx *getutxid(const struct utmpx *);struct utmpx *getutxline(const struct utmpx *);struct utmpx *pututxline(const struct utmpx *);void setutxent(void);</tt></pre></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_13_82_04"></a>APPLICATION USAGE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_82_05"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_82_06"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_82_07"></a>SEE ALSO</h4><blockquote><p><a href="sys/time.h.html"><i><sys/time.h></i></a> , <a href="sys/types.h.html"><i><sys/types.h></i></a> , the SystemInterfaces volume of IEEE Std 1003.1-2001, <a href="../functions/endutxent.html"><i>endutxent</i>()</a></p></blockquote><h4><a name="tag_13_82_08"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 4, Version 2.</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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