📄 syslog.h.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><syslog.h></title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="<syslog.h>"></a> <a name="tag_13_72"></a><!-- <syslog.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_72_01"></a>NAME</h4><blockquote>syslog.h - definitions for system error logging</blockquote><h4><a name="tag_13_72_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 <syslog.h> <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></div></blockquote><h4><a name="tag_13_72_03"></a>DESCRIPTION</h4><blockquote><p>The <i><syslog.h></i> header shall define the following symbolic constants, zero or more of which may be OR'ed together toform the <i>logopt</i> option of <a href="../functions/openlog.html"><i>openlog</i>()</a>:</p><dl compact><dt>LOG_PID</dt><dd>Log the process ID with each message.</dd><dt>LOG_CONS</dt><dd>Log to the system console on error.</dd><dt>LOG_NDELAY</dt><dd>Connect to syslog daemon immediately.</dd><dt>LOG_ODELAY</dt><dd>Delay open until <a href="../functions/syslog.html"><i>syslog</i>()</a> is called.</dd><dt>LOG_NOWAIT</dt><dd>Do not wait for child processes.</dd></dl><p>The following symbolic constants shall be defined as possible values of the <i>facility</i> argument to <a href="../functions/openlog.html"><i>openlog</i>()</a>:</p><dl compact><dt>LOG_KERN</dt><dd>Reserved for message generated by the system.</dd><dt>LOG_USER</dt><dd>Message generated by a process.</dd><dt>LOG_MAIL</dt><dd>Reserved for message generated by mail system.</dd><dt>LOG_NEWS</dt><dd>Reserved for message generated by news system.</dd><dt>LOG_UUCP</dt><dd>Reserved for message generated by UUCP system.</dd><dt>LOG_DAEMON</dt><dd>Reserved for message generated by system daemon.</dd><dt>LOG_AUTH</dt><dd>Reserved for message generated by authorization daemon.</dd><dt>LOG_CRON</dt><dd>Reserved for message generated by clock daemon.</dd><dt>LOG_LPR</dt><dd>Reserved for message generated by printer system.</dd><dt>LOG_LOCAL0</dt><dd>Reserved for local use.</dd><dt>LOG_LOCAL1</dt><dd>Reserved for local use.</dd><dt>LOG_LOCAL2</dt><dd>Reserved for local use.</dd><dt>LOG_LOCAL3</dt><dd>Reserved for local use.</dd><dt>LOG_LOCAL4</dt><dd>Reserved for local use.</dd><dt>LOG_LOCAL5</dt><dd>Reserved for local use.</dd><dt>LOG_LOCAL6</dt><dd>Reserved for local use.</dd><dt>LOG_LOCAL7</dt><dd>Reserved for local use.</dd></dl><p>The following shall be declared as macros for constructing the <i>maskpri</i> argument to <a href="../functions/setlogmask.html"><i>setlogmask</i>()</a>. The following macros expand to an expression of type <b>int</b> when theargument <i>pri</i> is an expression of type <b>int</b>:</p><dl compact><dt>LOG_MASK(<i>pri</i>)</dt><dd>A mask for priority <i>pri</i>.</dd></dl><p>The following constants shall be defined as possible values for the <i>priority</i> argument of <a href="../functions/syslog.html"><i>syslog</i>()</a>:</p><dl compact><dt>LOG_EMERG</dt><dd>A panic condition was reported to all processes.</dd><dt>LOG_ALERT</dt><dd>A condition that should be corrected immediately.</dd><dt>LOG_CRIT</dt><dd>A critical condition.</dd><dt>LOG_ERR</dt><dd>An error message.</dd><dt>LOG_WARNING</dt><dd>A warning message.</dd><dt>LOG_NOTICE</dt><dd>A condition requiring special handling.</dd><dt>LOG_INFO</dt><dd>A general information message.</dd><dt>LOG_DEBUG</dt><dd>A message useful for debugging programs.</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 closelog(void);void openlog(const char *, int, int);int setlogmask(int);void syslog(int, const char *, ...);</tt></pre></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_13_72_04"></a>APPLICATION USAGE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_72_05"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_72_06"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_72_07"></a>SEE ALSO</h4><blockquote><p>The System Interfaces volume of IEEE Std 1003.1-2001, <a href="../functions/closelog.html"><i>closelog</i>()</a></p></blockquote><h4><a name="tag_13_72_08"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 4, Version 2.</p></blockquote><h4><a name="tag_13_72_09"></a>Issue 5</h4><blockquote><p>Moved from X/Open UNIX to BASE.</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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