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543 lines
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<!DOCTYPE html>
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<title>syslog - The Go Programming Language</title>
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<div class="top-heading" id="heading-wide"><a href="http://localhost:6060/">The Go Programming Language</a></div>
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<div id="page" class="wide">
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<div class="container">
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<h1>Package syslog</h1>
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<div id="nav"></div>
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<!--
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Copyright 2009 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file.
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-->
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<!--
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Note: Static (i.e., not template-generated) href and id
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attributes start with "pkg-" to make it impossible for
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them to conflict with generated attributes (some of which
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correspond to Go identifiers).
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-->
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<script type='text/javascript'>
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document.ANALYSIS_DATA = null;
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document.CALLGRAPH = null;
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</script>
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<div id="short-nav">
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<dl>
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<dd><code>import "log/syslog"</code></dd>
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</dl>
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<dl>
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<dd><a href="index.html#pkg-overview" class="overviewLink">Overview</a></dd>
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<dd><a href="index.html#pkg-index" class="indexLink">Index</a></dd>
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</dl>
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</div>
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<!-- The package's Name is printed as title by the top-level template -->
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<div id="pkg-overview" class="toggleVisible">
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<div class="collapsed">
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<h2 class="toggleButton" title="Click to show Overview section">Overview ▹</h2>
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</div>
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<div class="expanded">
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<h2 class="toggleButton" title="Click to hide Overview section">Overview ▾</h2>
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<p>
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Package syslog provides a simple interface to the system log
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service. It can send messages to the syslog daemon using UNIX
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domain sockets, UDP or TCP.
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</p>
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<p>
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Only one call to Dial is necessary. On write failures,
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the syslog client will attempt to reconnect to the server
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and write again.
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</p>
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<p>
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The syslog package is frozen and not accepting new features.
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Some external packages provide more functionality. See:
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</p>
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<pre><a href="https://godoc.org/?q=syslog">https://godoc.org/?q=syslog</a>
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</pre>
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</div>
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</div>
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<div id="pkg-index" class="toggleVisible">
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<h2 class="toggleButton" title="Click to show Index section">Index ▹</h2>
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<h2 class="toggleButton" title="Click to hide Index section">Index ▾</h2>
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<!-- Table of contents for API; must be named manual-nav to turn off auto nav. -->
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<div id="manual-nav">
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<dl>
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<dd><a href="index.html#NewLogger">func NewLogger(p Priority, logFlag int) (*log.Logger, error)</a></dd>
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<dd><a href="index.html#Priority">type Priority</a></dd>
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<dd><a href="index.html#Writer">type Writer</a></dd>
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<dd> <a href="index.html#Dial">func Dial(network, raddr string, priority Priority, tag string) (*Writer, error)</a></dd>
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<dd> <a href="index.html#New">func New(priority Priority, tag string) (w *Writer, err error)</a></dd>
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<dd> <a href="index.html#Writer.Alert">func (w *Writer) Alert(m string) (err error)</a></dd>
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<dd> <a href="index.html#Writer.Close">func (w *Writer) Close() error</a></dd>
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<dd> <a href="index.html#Writer.Crit">func (w *Writer) Crit(m string) (err error)</a></dd>
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<dd> <a href="index.html#Writer.Debug">func (w *Writer) Debug(m string) (err error)</a></dd>
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<dd> <a href="index.html#Writer.Emerg">func (w *Writer) Emerg(m string) (err error)</a></dd>
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<dd> <a href="index.html#Writer.Err">func (w *Writer) Err(m string) (err error)</a></dd>
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<dd> <a href="index.html#Writer.Info">func (w *Writer) Info(m string) (err error)</a></dd>
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<dd> <a href="index.html#Writer.Notice">func (w *Writer) Notice(m string) (err error)</a></dd>
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<dd> <a href="index.html#Writer.Warning">func (w *Writer) Warning(m string) (err error)</a></dd>
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<dd> <a href="index.html#Writer.Write">func (w *Writer) Write(b []byte) (int, error)</a></dd>
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<dd><a href="index.html#pkg-note-BUG">Bugs</a></dd>
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</dl>
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</div><!-- #manual-nav -->
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<h4>Package files</h4>
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<p>
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<span style="font-size:90%">
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<a href="http://localhost:6060/src/log/syslog/doc.go">doc.go</a>
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<a href="http://localhost:6060/src/log/syslog/syslog.go">syslog.go</a>
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<a href="http://localhost:6060/src/log/syslog/syslog_unix.go">syslog_unix.go</a>
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</span>
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</p>
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</div><!-- .expanded -->
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</div><!-- #pkg-index -->
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<div id="pkg-callgraph" class="toggle" style="display: none">
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<div class="collapsed">
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<h2 class="toggleButton" title="Click to show Internal Call Graph section">Internal call graph ▹</h2>
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</div> <!-- .expanded -->
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<div class="expanded">
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<h2 class="toggleButton" title="Click to hide Internal Call Graph section">Internal call graph ▾</h2>
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<p>
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In the call graph viewer below, each node
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is a function belonging to this package
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and its children are the functions it
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calls—perhaps dynamically.
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</p>
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<p>
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The root nodes are the entry points of the
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package: functions that may be called from
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outside the package.
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There may be non-exported or anonymous
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functions among them if they are called
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dynamically from another package.
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</p>
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<p>
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Click a node to visit that function's source code.
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From there you can visit its callers by
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clicking its declaring <code>func</code>
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token.
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</p>
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<p>
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Functions may be omitted if they were
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determined to be unreachable in the
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particular programs or tests that were
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analyzed.
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</p>
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<!-- Zero means show all package entry points. -->
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<ul style="margin-left: 0.5in" id="callgraph-0" class="treeview"></ul>
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</div>
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</div> <!-- #pkg-callgraph -->
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<h2 id="NewLogger">func <a href="http://localhost:6060/src/log/syslog/syslog.go?s=7160:7220#L296">NewLogger</a></h2>
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<pre>func NewLogger(p <a href="index.html#Priority">Priority</a>, logFlag <a href="../../builtin/index.html#int">int</a>) (*<a href="../index.html">log</a>.<a href="../index.html#Logger">Logger</a>, <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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NewLogger creates a log.Logger whose output is written to
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the system log service with the specified priority. The logFlag
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argument is the flag set passed through to log.New to create
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the Logger.
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</p>
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<h2 id="Priority">type <a href="http://localhost:6060/src/log/syslog/syslog.go?s=521:538#L14">Priority</a></h2>
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<pre>type Priority <a href="../../builtin/index.html#int">int</a></pre>
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<p>
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The Priority is a combination of the syslog facility and
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severity. For example, LOG_ALERT | LOG_FTP sends an alert severity
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message from the FTP facility. The default severity is LOG_EMERG;
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the default facility is LOG_KERN.
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</p>
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<pre>const (
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<span class="comment">// From /usr/include/sys/syslog.h.</span>
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<span class="comment">// These are the same on Linux, BSD, and OS X.</span>
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<span id="LOG_EMERG">LOG_EMERG</span> <a href="index.html#Priority">Priority</a> = <a href="../../builtin/index.html#iota">iota</a>
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<span id="LOG_ALERT">LOG_ALERT</span>
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<span id="LOG_CRIT">LOG_CRIT</span>
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<span id="LOG_ERR">LOG_ERR</span>
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<span id="LOG_WARNING">LOG_WARNING</span>
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<span id="LOG_NOTICE">LOG_NOTICE</span>
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<span id="LOG_INFO">LOG_INFO</span>
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<span id="LOG_DEBUG">LOG_DEBUG</span>
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)</pre>
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<pre>const (
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<span class="comment">// From /usr/include/sys/syslog.h.</span>
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<span class="comment">// These are the same up to LOG_FTP on Linux, BSD, and OS X.</span>
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<span id="LOG_KERN">LOG_KERN</span> <a href="index.html#Priority">Priority</a> = <a href="../../builtin/index.html#iota">iota</a> << 3
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<span id="LOG_USER">LOG_USER</span>
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<span id="LOG_MAIL">LOG_MAIL</span>
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<span id="LOG_DAEMON">LOG_DAEMON</span>
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<span id="LOG_AUTH">LOG_AUTH</span>
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<span id="LOG_SYSLOG">LOG_SYSLOG</span>
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<span id="LOG_LPR">LOG_LPR</span>
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<span id="LOG_NEWS">LOG_NEWS</span>
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<span id="LOG_UUCP">LOG_UUCP</span>
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<span id="LOG_CRON">LOG_CRON</span>
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<span id="LOG_AUTHPRIV">LOG_AUTHPRIV</span>
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<span id="LOG_FTP">LOG_FTP</span>
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<span id="LOG_LOCAL0">LOG_LOCAL0</span>
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<span id="LOG_LOCAL1">LOG_LOCAL1</span>
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<span id="LOG_LOCAL2">LOG_LOCAL2</span>
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<span id="LOG_LOCAL3">LOG_LOCAL3</span>
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<span id="LOG_LOCAL4">LOG_LOCAL4</span>
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<span id="LOG_LOCAL5">LOG_LOCAL5</span>
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<span id="LOG_LOCAL6">LOG_LOCAL6</span>
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<span id="LOG_LOCAL7">LOG_LOCAL7</span>
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)</pre>
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<h2 id="Writer">type <a href="http://localhost:6060/src/log/syslog/syslog.go?s=1273:1432#L66">Writer</a></h2>
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<pre>type Writer struct {
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<span class="comment">// contains filtered or unexported fields</span>
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}</pre>
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<p>
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A Writer is a connection to a syslog server.
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</p>
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<h3 id="Dial">func <a href="http://localhost:6060/src/log/syslog/syslog.go?s=2506:2586#L105">Dial</a></h3>
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<pre>func Dial(network, raddr <a href="../../builtin/index.html#string">string</a>, priority <a href="index.html#Priority">Priority</a>, tag <a href="../../builtin/index.html#string">string</a>) (*<a href="index.html#Writer">Writer</a>, <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Dial establishes a connection to a log daemon by connecting to
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address raddr on the specified network. Each write to the returned
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writer sends a log message with the given facility, severity and
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tag.
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If network is empty, Dial will connect to the local syslog server.
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</p>
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<h3 id="New">func <a href="http://localhost:6060/src/log/syslog/syslog.go?s=2119:2181#L96">New</a></h3>
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<pre>func New(priority <a href="index.html#Priority">Priority</a>, tag <a href="../../builtin/index.html#string">string</a>) (w *<a href="index.html#Writer">Writer</a>, err <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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New establishes a new connection to the system log daemon. Each
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write to the returned writer sends a log message with the given
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priority and prefix.
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</p>
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<h3 id="Writer.Alert">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=4200:4244#L187">Alert</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Alert(m <a href="../../builtin/index.html#string">string</a>) (err <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Alert logs a message with severity LOG_ALERT, ignoring the severity
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passed to New.
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</p>
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<h3 id="Writer.Close">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=3762:3792#L166">Close</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Close() <a href="../../builtin/index.html#error">error</a></pre>
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<p>
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Close closes a connection to the syslog daemon.
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</p>
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<h3 id="Writer.Crit">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=4389:4432#L194">Crit</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Crit(m <a href="../../builtin/index.html#string">string</a>) (err <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Crit logs a message with severity LOG_CRIT, ignoring the severity
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passed to New.
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</p>
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<h3 id="Writer.Debug">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=5342:5386#L229">Debug</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Debug(m <a href="../../builtin/index.html#string">string</a>) (err <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Debug logs a message with severity LOG_DEBUG, ignoring the severity
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passed to New.
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</p>
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<h3 id="Writer.Emerg">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=4009:4053#L180">Emerg</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Emerg(m <a href="../../builtin/index.html#string">string</a>) (err <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Emerg logs a message with severity LOG_EMERG, ignoring the severity
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passed to New.
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</p>
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<h3 id="Writer.Err">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=4574:4616#L201">Err</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Err(m <a href="../../builtin/index.html#string">string</a>) (err <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Err logs a message with severity LOG_ERR, ignoring the severity
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passed to New.
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</p>
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<h3 id="Writer.Info">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=5153:5196#L222">Info</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Info(m <a href="../../builtin/index.html#string">string</a>) (err <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Info logs a message with severity LOG_INFO, ignoring the severity
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passed to New.
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</p>
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<h3 id="Writer.Notice">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=4962:5007#L215">Notice</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Notice(m <a href="../../builtin/index.html#string">string</a>) (err <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Notice logs a message with severity LOG_NOTICE, ignoring the
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severity passed to New.
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</p>
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<h3 id="Writer.Warning">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=4765:4811#L208">Warning</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Warning(m <a href="../../builtin/index.html#string">string</a>) (err <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Warning logs a message with severity LOG_WARNING, ignoring the
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severity passed to New.
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</p>
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<h3 id="Writer.Write">func (*Writer) <a href="http://localhost:6060/src/log/syslog/syslog.go?s=3613:3658#L161">Write</a></h3>
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<pre>func (w *<a href="index.html#Writer">Writer</a>) Write(b []<a href="../../builtin/index.html#byte">byte</a>) (<a href="../../builtin/index.html#int">int</a>, <a href="../../builtin/index.html#error">error</a>)</pre>
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<p>
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Write sends a log message to the syslog daemon.
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</p>
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<h2 id="pkg-note-BUG">Bugs</h2>
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<ul style="list-style: none; padding: 0;">
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<li><a href="http://localhost:6060/src/log/syslog/doc.go?s=640:873#L9">☞</a> This package is not implemented on Windows. As the
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syslog package is frozen, Windows users are encouraged to
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use a package outside of the standard library. For background,
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see https://golang.org/issue/1108.
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</li>
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<li><a href="http://localhost:6060/src/log/syslog/doc.go?s=875:933#L14">☞</a> This package is not implemented on Plan 9.
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</li>
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<li><a href="http://localhost:6060/src/log/syslog/doc.go?s=935:1006#L16">☞</a> This package is not implemented on NaCl (Native Client).
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</li>
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</ul>
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<div id="footer">
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Build version go1.6.<br>
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Except as <a href="https://developers.google.com/site-policies#restrictions">noted</a>,
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the content of this page is licensed under the
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Creative Commons Attribution 3.0 License,
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and code is licensed under a <a href="http://localhost:6060/LICENSE">BSD license</a>.<br>
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