<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ -->
<title>src/System/Log/Handler/Syslog.hs</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-2"></a><span class='hs-comment'>{- arch-tag: Syslog handler
<a name="line-3"></a>Copyright (C) 2004-2006 John Goerzen <jgoerzen@complete.org>
<a name="line-4"></a>
<a name="line-5"></a>This program is free software; you can redistribute it and/or modify
<a name="line-6"></a>it under the terms of the GNU Lesser General Public License as published by
<a name="line-7"></a>the Free Software Foundation; either version 2.1 of the License, or
<a name="line-8"></a>(at your option) any later version.
<a name="line-9"></a>
<a name="line-10"></a>This program is distributed in the hope that it will be useful,
<a name="line-11"></a>but WITHOUT ANY WARRANTY; without even the implied warranty of
<a name="line-12"></a>MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<a name="line-13"></a>GNU Lesser General Public License for more details.
<a name="line-14"></a>
<a name="line-15"></a>You should have received a copy of the GNU Lesser General Public License
<a name="line-16"></a>along with this program; if not, write to the Free Software
<a name="line-17"></a>Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
<a name="line-18"></a>-}</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='hs-comment'>{- |
<a name="line-21"></a> Module : System.Log.Handler.Syslog
<a name="line-22"></a> Copyright : Copyright (C) 2004-2006 John Goerzen
<a name="line-23"></a> License : GNU LGPL, version 2.1 or above
<a name="line-24"></a>
<a name="line-25"></a> Maintainer : John Goerzen <jgoerzen@complete.org>
<a name="line-26"></a> Stability : provisional
<a name="line-27"></a> Portability: portable
<a name="line-28"></a>
<a name="line-29"></a>Syslog handler for the Haskell Logging Framework
<a name="line-30"></a>
<a name="line-31"></a>Written by John Goerzen, jgoerzen\@complete.org
<a name="line-32"></a>
<a name="line-33"></a>This module implements an interface to the Syslog service commonly
<a name="line-34"></a>found in Unix\/Linux systems. This interface is primarily of interest to
<a name="line-35"></a>developers of servers, as Syslog does not typically display messages in
<a name="line-36"></a>an interactive fashion.
<a name="line-37"></a>
<a name="line-38"></a>This module is written in pure Haskell and is capable of logging to a local
<a name="line-39"></a>or remote machine using the Syslog protocol.
<a name="line-40"></a>
<a name="line-41"></a>You can create a new Syslog 'LogHandler' by calling 'openlog'.
<a name="line-42"></a>
<a name="line-43"></a>More information on the Haskell Logging Framework can be found at
<a name="line-44"></a>"System.Log.Logger". This module can also be used outside
<a name="line-45"></a>of the rest of that framework for those interested in that.
<a name="line-46"></a>-}</span>
<a name="line-47"></a>
<a name="line-48"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Log</span><span class='hs-varop'>.</span><span class='hs-conid'>Handler</span><span class='hs-varop'>.</span><span class='hs-conid'>Syslog</span><span class='hs-layout'>(</span>
<a name="line-49"></a> <span class='hs-comment'>-- * Handler Initialization</span>
<a name="line-50"></a> <span class='hs-varid'>openlog</span><span class='hs-layout'>,</span>
<a name="line-51"></a> <span class='hs-comment'>-- * Advanced handler initialization</span>
<a name="line-52"></a><span class='hs-cpp'>#ifndef mingw32_HOST_OS</span>
<a name="line-53"></a> <span class='hs-varid'>openlog_local</span><span class='hs-layout'>,</span>
<a name="line-54"></a><span class='hs-cpp'>#endif</span>
<a name="line-55"></a> <span class='hs-varid'>openlog_remote</span><span class='hs-layout'>,</span>
<a name="line-56"></a> <span class='hs-varid'>openlog_generic</span><span class='hs-layout'>,</span>
<a name="line-57"></a> <span class='hs-comment'>-- * Data Types</span>
<a name="line-58"></a> <span class='hs-conid'>Facility</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-59"></a> <span class='hs-conid'>Option</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-60"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-61"></a>
<a name="line-62"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Log</span>
<a name="line-63"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Log</span><span class='hs-varop'>.</span><span class='hs-conid'>Formatter</span>
<a name="line-64"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Log</span><span class='hs-varop'>.</span><span class='hs-conid'>Handler</span>
<a name="line-65"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span>
<a name="line-66"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>Socket</span>
<a name="line-67"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Network</span><span class='hs-varop'>.</span><span class='hs-conid'>BSD</span>
<a name="line-68"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-69"></a><span class='hs-cpp'>#ifndef mingw32_HOST_OS</span>
<a name="line-70"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Process</span><span class='hs-layout'>(</span><span class='hs-varid'>getProcessID</span><span class='hs-layout'>)</span>
<a name="line-71"></a><span class='hs-cpp'>#endif</span>
<a name="line-72"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span>
<a name="line-73"></a>
<a name="line-74"></a><a name="code_of_pri"></a><span class='hs-definition'>code_of_pri</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Priority</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-75"></a><span class='hs-definition'>code_of_pri</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-76"></a> <span class='hs-conid'>EMERGENCY</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0</span>
<a name="line-77"></a> <span class='hs-conid'>ALERT</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>1</span>
<a name="line-78"></a> <span class='hs-conid'>CRITICAL</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>2</span>
<a name="line-79"></a> <span class='hs-conid'>ERROR</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>3</span>
<a name="line-80"></a> <span class='hs-conid'>WARNING</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>4</span>
<a name="line-81"></a> <span class='hs-conid'>NOTICE</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>5</span>
<a name="line-82"></a> <span class='hs-conid'>INFO</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>6</span>
<a name="line-83"></a> <span class='hs-conid'>DEBUG</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>7</span>
<a name="line-84"></a>
<a name="line-85"></a><span class='hs-comment'>{- | Facilities are used by the system to determine where messages
<a name="line-86"></a>are sent. -}</span>
<a name="line-87"></a>
<a name="line-88"></a><a name="Facility"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Facility</span> <span class='hs-keyglyph'>=</span>
<a name="line-89"></a> <span class='hs-conid'>KERN</span> <span class='hs-comment'>-- ^ Kernel messages; you should likely never use this in your programs</span>
<a name="line-90"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>USER</span> <span class='hs-comment'>-- ^ General userland messages. Use this if nothing else is appropriate</span>
<a name="line-91"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>MAIL</span> <span class='hs-comment'>-- ^ E-Mail system</span>
<a name="line-92"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>DAEMON</span> <span class='hs-comment'>-- ^ Daemon (server process) messages</span>
<a name="line-93"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>AUTH</span> <span class='hs-comment'>-- ^ Authentication or security messages</span>
<a name="line-94"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SYSLOG</span> <span class='hs-comment'>-- ^ Internal syslog messages; you should likely never use this in your programs</span>
<a name="line-95"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LPR</span> <span class='hs-comment'>-- ^ Printer messages</span>
<a name="line-96"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NEWS</span> <span class='hs-comment'>-- ^ Usenet news</span>
<a name="line-97"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UUCP</span> <span class='hs-comment'>-- ^ UUCP messages</span>
<a name="line-98"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>CRON</span> <span class='hs-comment'>-- ^ Cron messages</span>
<a name="line-99"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>AUTHPRIV</span> <span class='hs-comment'>-- ^ Private authentication messages</span>
<a name="line-100"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>FTP</span> <span class='hs-comment'>-- ^ FTP messages</span>
<a name="line-101"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LOCAL0</span> <span class='hs-comment'>-- ^ LOCAL0 through LOCAL7 are reserved for you to customize as you wish</span>
<a name="line-102"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LOCAL1</span>
<a name="line-103"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LOCAL2</span>
<a name="line-104"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LOCAL3</span>
<a name="line-105"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LOCAL4</span>
<a name="line-106"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LOCAL5</span>
<a name="line-107"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LOCAL6</span>
<a name="line-108"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LOCAL7</span>
<a name="line-109"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-110"></a>
<a name="line-111"></a><a name="code_of_fac"></a><span class='hs-definition'>code_of_fac</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Facility</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-112"></a><span class='hs-definition'>code_of_fac</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>of</span>
<a name="line-113"></a> <span class='hs-conid'>KERN</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0</span>
<a name="line-114"></a> <span class='hs-conid'>USER</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>1</span>
<a name="line-115"></a> <span class='hs-conid'>MAIL</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>2</span>
<a name="line-116"></a> <span class='hs-conid'>DAEMON</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>3</span>
<a name="line-117"></a> <span class='hs-conid'>AUTH</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>4</span>
<a name="line-118"></a> <span class='hs-conid'>SYSLOG</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>5</span>
<a name="line-119"></a> <span class='hs-conid'>LPR</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>6</span>
<a name="line-120"></a> <span class='hs-conid'>NEWS</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>7</span>
<a name="line-121"></a> <span class='hs-conid'>UUCP</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>8</span>
<a name="line-122"></a> <span class='hs-conid'>CRON</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>9</span>
<a name="line-123"></a> <span class='hs-conid'>AUTHPRIV</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>10</span>
<a name="line-124"></a> <span class='hs-conid'>FTP</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>11</span>
<a name="line-125"></a> <span class='hs-conid'>LOCAL0</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>16</span>
<a name="line-126"></a> <span class='hs-conid'>LOCAL1</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>17</span>
<a name="line-127"></a> <span class='hs-conid'>LOCAL2</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>18</span>
<a name="line-128"></a> <span class='hs-conid'>LOCAL3</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>19</span>
<a name="line-129"></a> <span class='hs-conid'>LOCAL4</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>20</span>
<a name="line-130"></a> <span class='hs-conid'>LOCAL5</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>21</span>
<a name="line-131"></a> <span class='hs-conid'>LOCAL6</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>22</span>
<a name="line-132"></a> <span class='hs-conid'>LOCAL7</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>23</span>
<a name="line-133"></a>
<a name="line-134"></a><a name="makeCode"></a><span class='hs-definition'>makeCode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Facility</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Priority</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-135"></a><span class='hs-definition'>makeCode</span> <span class='hs-varid'>fac</span> <span class='hs-varid'>pri</span> <span class='hs-keyglyph'>=</span>
<a name="line-136"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>faccode</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>code_of_fac</span> <span class='hs-varid'>fac</span>
<a name="line-137"></a> <span class='hs-varid'>pricode</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>code_of_pri</span> <span class='hs-varid'>pri</span> <span class='hs-keyword'>in</span>
<a name="line-138"></a> <span class='hs-layout'>(</span><span class='hs-varid'>faccode</span> <span class='hs-varop'>`shiftL`</span> <span class='hs-num'>3</span><span class='hs-layout'>)</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>pricode</span>
<a name="line-139"></a>
<a name="line-140"></a><span class='hs-comment'>{- | Options for 'openlog'. -}</span>
<a name="line-141"></a>
<a name="line-142"></a><a name="Option"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Option</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PID</span> <span class='hs-comment'>-- ^ Automatically log process ID (PID) with each message</span>
<a name="line-143"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PERROR</span> <span class='hs-comment'>-- ^ Send a copy of each message to stderr</span>
<a name="line-144"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span><span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-145"></a>
<a name="line-146"></a><a name="SyslogHandler"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>SyslogHandler</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>SyslogHandler</span> <span class='hs-layout'>{</span><span class='hs-varid'>options</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Option</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-147"></a> <span class='hs-varid'>facility</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Facility</span><span class='hs-layout'>,</span>
<a name="line-148"></a> <span class='hs-varid'>identity</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span>
<a name="line-149"></a> <span class='hs-varid'>logsocket</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Socket</span><span class='hs-layout'>,</span>
<a name="line-150"></a> <span class='hs-varid'>address</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SockAddr</span><span class='hs-layout'>,</span>
<a name="line-151"></a> <span class='hs-varid'>priority</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Priority</span><span class='hs-layout'>,</span>
<a name="line-152"></a> <span class='hs-varid'>formatter</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>LogFormatter</span> <span class='hs-conid'>SyslogHandler</span>
<a name="line-153"></a> <span class='hs-layout'>}</span>
<a name="line-154"></a>
<a name="line-155"></a><span class='hs-comment'>{- | Initialize the Syslog system using the local system's default interface,
<a name="line-156"></a>\/dev\/log. Will return a new 'System.Log.Handler.LogHandler'.
<a name="line-157"></a>
<a name="line-158"></a>On Windows, instead of using \/dev\/log, this will attempt to send
<a name="line-159"></a>UDP messages to something listening on the syslog port (514) on localhost.
<a name="line-160"></a>
<a name="line-161"></a>Use 'openlog_remote' if you need more control.
<a name="line-162"></a>-}</span>
<a name="line-163"></a>
<a name="line-164"></a><a name="openlog"></a><span class='hs-definition'>openlog</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ The name of this program -- will be prepended to every log message</span>
<a name="line-165"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Option</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ A list of 'Option's. The list [] is perfectly valid. ['PID'] is probably most common here.</span>
<a name="line-166"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Facility</span> <span class='hs-comment'>-- ^ The 'Facility' value to pass to the syslog system for every message logged</span>
<a name="line-167"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Priority</span> <span class='hs-comment'>-- ^ Messages logged below this priority will be ignored. To include every message, set this to 'DEBUG'.</span>
<a name="line-168"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>SyslogHandler</span> <span class='hs-comment'>-- ^ Returns the new handler</span>
<a name="line-169"></a>
<a name="line-170"></a><span class='hs-cpp'>#ifdef mingw32_HOST_OS</span>
<a name="line-171"></a><span class='hs-definition'>openlog</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>openlog_remote</span> <span class='hs-conid'>AF_INET</span> <span class='hs-str'>"localhost"</span> <span class='hs-num'>514</span>
<a name="line-172"></a><span class='hs-cpp'>#elif darwin_HOST_OS</span>
<a name="line-173"></a><span class='hs-definition'>openlog</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>openlog_local</span> <span class='hs-str'>"/var/run/syslog"</span>
<a name="line-174"></a><span class='hs-cpp'>#else</span>
<a name="line-175"></a><span class='hs-definition'>openlog</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>openlog_local</span> <span class='hs-str'>"/dev/log"</span>
<a name="line-176"></a><span class='hs-cpp'>#endif</span>
<a name="line-177"></a>
<a name="line-178"></a><span class='hs-comment'>{- | Initialize the Syslog system using an arbitrary Unix socket (FIFO).
<a name="line-179"></a>
<a name="line-180"></a>Not supported under Windows.
<a name="line-181"></a>-}</span>
<a name="line-182"></a>
<a name="line-183"></a><span class='hs-cpp'>#ifndef mingw32_HOST_OS</span>
<a name="line-184"></a><a name="openlog_local"></a><span class='hs-definition'>openlog_local</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Path to FIFO</span>
<a name="line-185"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Program name</span>
<a name="line-186"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Option</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ 'Option's</span>
<a name="line-187"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Facility</span> <span class='hs-comment'>-- ^ Facility value</span>
<a name="line-188"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Priority</span> <span class='hs-comment'>-- ^ Priority limit</span>
<a name="line-189"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>SyslogHandler</span>
<a name="line-190"></a><span class='hs-definition'>openlog_local</span> <span class='hs-varid'>fifopath</span> <span class='hs-varid'>ident</span> <span class='hs-varid'>options</span> <span class='hs-varid'>fac</span> <span class='hs-varid'>pri</span> <span class='hs-keyglyph'>=</span>
<a name="line-191"></a> <span class='hs-keyword'>do</span>
<a name="line-192"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>socket</span> <span class='hs-conid'>AF_UNIX</span> <span class='hs-conid'>Datagram</span> <span class='hs-num'>0</span>
<a name="line-193"></a> <span class='hs-varid'>openlog_generic</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>SockAddrUnix</span> <span class='hs-varid'>fifopath</span><span class='hs-layout'>)</span> <span class='hs-varid'>ident</span> <span class='hs-varid'>options</span> <span class='hs-varid'>fac</span> <span class='hs-varid'>pri</span>
<a name="line-194"></a><span class='hs-cpp'>#endif</span>
<a name="line-195"></a>
<a name="line-196"></a><a name="openlog_remote"></a><span class='hs-comment'>{- | Log to a remote server via UDP. -}</span>
<a name="line-197"></a><span class='hs-definition'>openlog_remote</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Family</span> <span class='hs-comment'>-- ^ Usually AF_INET or AF_INET6; see Network.Socket</span>
<a name="line-198"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>HostName</span> <span class='hs-comment'>-- ^ Remote hostname. Some use @localhost@</span>
<a name="line-199"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PortNumber</span> <span class='hs-comment'>-- ^ 514 is the default for syslog</span>
<a name="line-200"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Program name</span>
<a name="line-201"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Option</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ 'Option's</span>
<a name="line-202"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Facility</span> <span class='hs-comment'>-- ^ Facility value</span>
<a name="line-203"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Priority</span> <span class='hs-comment'>-- ^ Priority limit</span>
<a name="line-204"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>SyslogHandler</span>
<a name="line-205"></a><span class='hs-definition'>openlog_remote</span> <span class='hs-varid'>fam</span> <span class='hs-varid'>hostname</span> <span class='hs-varid'>port</span> <span class='hs-varid'>ident</span> <span class='hs-varid'>options</span> <span class='hs-varid'>fac</span> <span class='hs-varid'>pri</span> <span class='hs-keyglyph'>=</span>
<a name="line-206"></a> <span class='hs-keyword'>do</span>
<a name="line-207"></a> <span class='hs-varid'>he</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getHostByName</span> <span class='hs-varid'>hostname</span>
<a name="line-208"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>socket</span> <span class='hs-varid'>fam</span> <span class='hs-conid'>Datagram</span> <span class='hs-num'>0</span>
<a name="line-209"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>addr</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>SockAddrInet</span> <span class='hs-varid'>port</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-layout'>(</span><span class='hs-varid'>hostAddresses</span> <span class='hs-varid'>he</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-210"></a> <span class='hs-varid'>openlog_generic</span> <span class='hs-varid'>s</span> <span class='hs-varid'>addr</span> <span class='hs-varid'>ident</span> <span class='hs-varid'>options</span> <span class='hs-varid'>fac</span> <span class='hs-varid'>pri</span>
<a name="line-211"></a>
<a name="line-212"></a><a name="openlog_generic"></a><span class='hs-comment'>{- | The most powerful initialization mechanism. Takes an open datagram
<a name="line-213"></a>socket. -}</span>
<a name="line-214"></a><span class='hs-definition'>openlog_generic</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Socket</span> <span class='hs-comment'>-- ^ A datagram socket</span>
<a name="line-215"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SockAddr</span> <span class='hs-comment'>-- ^ Address for transmissions</span>
<a name="line-216"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Program name</span>
<a name="line-217"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Option</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ 'Option's</span>
<a name="line-218"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Facility</span> <span class='hs-comment'>-- ^ Facility value</span>
<a name="line-219"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Priority</span> <span class='hs-comment'>-- ^ Priority limit</span>
<a name="line-220"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>SyslogHandler</span>
<a name="line-221"></a><span class='hs-definition'>openlog_generic</span> <span class='hs-varid'>sock</span> <span class='hs-varid'>addr</span> <span class='hs-varid'>ident</span> <span class='hs-varid'>opt</span> <span class='hs-varid'>fac</span> <span class='hs-varid'>pri</span> <span class='hs-keyglyph'>=</span>
<a name="line-222"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>SyslogHandler</span> <span class='hs-layout'>{</span><span class='hs-varid'>options</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>opt</span><span class='hs-layout'>,</span>
<a name="line-223"></a> <span class='hs-varid'>facility</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fac</span><span class='hs-layout'>,</span>
<a name="line-224"></a> <span class='hs-varid'>identity</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ident</span><span class='hs-layout'>,</span>
<a name="line-225"></a> <span class='hs-varid'>logsocket</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sock</span><span class='hs-layout'>,</span>
<a name="line-226"></a> <span class='hs-varid'>address</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addr</span><span class='hs-layout'>,</span>
<a name="line-227"></a> <span class='hs-varid'>priority</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pri</span><span class='hs-layout'>,</span>
<a name="line-228"></a> <span class='hs-varid'>formatter</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>syslogFormatter</span>
<a name="line-229"></a> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-230"></a>
<a name="line-231"></a><a name="syslogFormatter"></a><span class='hs-definition'>syslogFormatter</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>LogFormatter</span> <span class='hs-conid'>SyslogHandler</span>
<a name="line-232"></a><span class='hs-definition'>syslogFormatter</span> <span class='hs-varid'>sh</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-layout'>,</span><span class='hs-varid'>msg</span><span class='hs-layout'>)</span> <span class='hs-varid'>logname</span> <span class='hs-keyglyph'>=</span>
<a name="line-233"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>code</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeCode</span> <span class='hs-layout'>(</span><span class='hs-varid'>facility</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span>
<a name="line-234"></a> <span class='hs-varid'>getpid</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<a name="line-235"></a> <span class='hs-varid'>getpid</span> <span class='hs-keyglyph'>=</span>
<a name="line-236"></a><span class='hs-cpp'>#ifndef mingw32_HOST_OS</span>
<a name="line-237"></a> <span class='hs-varid'>getProcessID</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>show</span>
<a name="line-238"></a><span class='hs-cpp'>#else</span>
<a name="line-239"></a> <span class='hs-varid'>return</span> <span class='hs-str'>"windows"</span>
<a name="line-240"></a><span class='hs-cpp'>#endif</span>
<a name="line-241"></a> <span class='hs-varid'>vars</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-str'>"code"</span><span class='hs-layout'>,</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>show</span> <span class='hs-varid'>code</span><span class='hs-layout'>)</span>
<a name="line-242"></a> <span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-str'>"identity"</span><span class='hs-layout'>,</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>identity</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span>
<a name="line-243"></a> <span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-str'>"pid"</span><span class='hs-layout'>,</span> <span class='hs-varid'>getpid</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-244"></a> <span class='hs-varid'>withPid</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>elem</span> <span class='hs-conid'>PID</span> <span class='hs-layout'>(</span><span class='hs-varid'>options</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-str'>"[$pid]"</span> <span class='hs-keyword'>else</span> <span class='hs-str'>""</span>
<a name="line-245"></a> <span class='hs-varid'>format</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"<$code>$identity"</span><span class='hs-varop'>++</span><span class='hs-varid'>withPid</span><span class='hs-varop'>++</span><span class='hs-str'>": [$loggername/$prio] $msg"</span>
<a name="line-246"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>varFormatter</span> <span class='hs-varid'>vars</span> <span class='hs-varid'>format</span> <span class='hs-varid'>sh</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-layout'>,</span><span class='hs-varid'>msg</span><span class='hs-layout'>)</span> <span class='hs-varid'>logname</span>
<a name="line-247"></a>
<a name="line-248"></a>
<a name="line-249"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LogHandler</span> <span class='hs-conid'>SyslogHandler</span> <span class='hs-keyword'>where</span>
<a name="line-250"></a> <span class='hs-varid'>setLevel</span> <span class='hs-varid'>sh</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sh</span><span class='hs-layout'>{</span><span class='hs-varid'>priority</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>p</span><span class='hs-layout'>}</span>
<a name="line-251"></a> <span class='hs-varid'>getLevel</span> <span class='hs-varid'>sh</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>priority</span> <span class='hs-varid'>sh</span>
<a name="line-252"></a> <span class='hs-varid'>setFormatter</span> <span class='hs-varid'>sh</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sh</span><span class='hs-layout'>{</span><span class='hs-varid'>formatter</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>}</span>
<a name="line-253"></a> <span class='hs-varid'>getFormatter</span> <span class='hs-varid'>sh</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>formatter</span> <span class='hs-varid'>sh</span>
<a name="line-254"></a> <span class='hs-varid'>emit</span> <span class='hs-varid'>sh</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>msg</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span>
<a name="line-255"></a> <span class='hs-keyword'>let</span>
<a name="line-256"></a> <span class='hs-varid'>sendstr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<a name="line-257"></a> <span class='hs-varid'>sendstr</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>[]</span>
<a name="line-258"></a> <span class='hs-varid'>sendstr</span> <span class='hs-varid'>omsg</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-259"></a> <span class='hs-varid'>sent</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>sendTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>logsocket</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span> <span class='hs-varid'>omsg</span> <span class='hs-layout'>(</span><span class='hs-varid'>address</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span>
<a name="line-260"></a> <span class='hs-varid'>sendstr</span> <span class='hs-layout'>(</span><span class='hs-varid'>genericDrop</span> <span class='hs-varid'>sent</span> <span class='hs-varid'>omsg</span><span class='hs-layout'>)</span>
<a name="line-261"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>do</span>
<a name="line-262"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>elem</span> <span class='hs-conid'>PERROR</span> <span class='hs-layout'>(</span><span class='hs-varid'>options</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-263"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>hPutStrLn</span> <span class='hs-varid'>stderr</span> <span class='hs-varid'>msg</span>
<a name="line-264"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-265"></a> <span class='hs-varid'>sendstr</span> <span class='hs-layout'>(</span><span class='hs-varid'>msg</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\0"</span><span class='hs-layout'>)</span>
<a name="line-266"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-267"></a> <span class='hs-varid'>close</span> <span class='hs-varid'>sh</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sClose</span> <span class='hs-layout'>(</span><span class='hs-varid'>logsocket</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span>
<a name="line-268"></a>
</pre></body>
</html>
