[Zope-Checkins] CVS: Zope3/lib/python/Zope/Server/Logger - FileLogger.py:1.1.4.1 ILogger.py:1.1.4.1 MultiLogger.py:1.1.4.1 ResolvingLogger.py:1.1.4.1 RotatingFileLogger.py:1.1.4.1 SocketLogger.py:1.1.4.1 SyslogLogger.py:1.1.4.1 TailLogger.py:1.1.4.1 UnresolvingLogger.py:1.1.4.1 __init__.py:1.1.4.1 m_syslog.py:1.1.4.1

Shane Hathaway shane@cvs.zope.org
Fri, 12 Apr 2002 17:31:00 -0400


Update of /cvs-repository/Zope3/lib/python/Zope/Server/Logger
In directory cvs.zope.org:/tmp/cvs-serv20835/lib/python/Zope/Server/Logger

Added Files:
      Tag: Zope-3x-branch
	FileLogger.py ILogger.py MultiLogger.py ResolvingLogger.py 
	RotatingFileLogger.py SocketLogger.py SyslogLogger.py 
	TailLogger.py UnresolvingLogger.py __init__.py m_syslog.py 
Log Message:
Merged Zope3-Server-Branch.


=== Added File Zope3/lib/python/Zope/Server/Logger/FileLogger.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: FileLogger.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""
from types import StringType

from ILogger import ILogger


class FileLogger:
    """Simple File Logger
    """

    __implements__ = ILogger


    def __init__ (self, file, flush=1, mode='a'):
        """pass this either a path or a file object."""
        if type(file) is StringType:
            if (file == '-'):
                import sys
                self.file = sys.stdout
            else:
                self.file = open (file, mode)
        else:
            self.file = file
        self.do_flush = flush


    def __repr__ (self):
        return '<file logger: %s>' % self.file


    def write (self, data):
        self.file.write (data)
        self.maybe_flush()


    def writeline (self, line):
        self.file.writeline (line)
        self.maybe_flush()


    def writelines (self, lines):
        self.file.writelines (lines)
        self.maybe_flush()


    def maybe_flush (self):
        if self.do_flush:
            self.file.flush()


    def flush (self):
        self.file.flush()


    def softspace (self, *args):
        pass


    ############################################################
    # Implementation methods for interface
    # Zope.Server.Logger.ILogger

    def log(self, message):
        'See Zope.Server.Logger.ILogger.ILogger'
        if message[-1] not in ('\r', '\n'):
            self.write (message + '\n')
        else:
            self.write (message)

    #
    ############################################################


=== Added File Zope3/lib/python/Zope/Server/Logger/ILogger.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: ILogger.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""

from Interface import Interface


class ILogger(Interface):
    """This interface describes the methods any Logging object has to
       implement.
    """

    def log(message):
        """Logs the passed message at the appropriate place."""


=== Added File Zope3/lib/python/Zope/Server/Logger/MultiLogger.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: MultiLogger.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""

import asynchat
import socket
import time         # these three are for the rotating logger
import os           # |
import stat         # v

from types import StringType


class MultiLogger:
    """Log to multiple places."""

    def __init__ (self, loggers):
        self.loggers = loggers

    def __repr__ (self):
        return '<multi logger: %s>' % (repr(self.loggers))

    def log (self, message):
        for logger in self.loggers:
            logger.log (message)



class ResolvingLogger:
    """Feed (ip, message) combinations into this logger to get a
    resolved hostname in front of the message.  The message will not
    be logged until the PTR request finishes (or fails)."""

    def __init__ (self, resolver, logger):
        self.resolver = resolver
        self.logger = logger


    class logger_thunk:
        def __init__ (self, message, logger):
            self.message = message
            self.logger = logger

        def __call__ (self, host, ttl, answer):
            if not answer:
                answer = host
            self.logger.log ('%s%s' % (answer, self.message))


    def log (self, ip, message):
        self.resolver.resolve_ptr (
                ip,
                self.logger_thunk (
                        message,
                        self.logger
                        )
                )



class UnresolvingLogger:
    """Just in case you don't want to resolve"""
    def __init__ (self, logger):
        self.logger = logger

    def log (self, ip, message):
        self.logger.log ('%s%s' % (ip, message))


def strip_eol (line):
    while line and line[-1] in '\r\n':
        line = line[:-1]
    return line


class TailLogger:
    """Keep track of the last <size> log messages"""
    def __init__ (self, logger, size=500):
        self.size = size
        self.logger = logger
        self.messages = []

    def log (self, message):
        self.messages.append (strip_eol (message))
        if len (self.messages) > self.size:
            del self.messages[0]
        self.logger.log (message)


=== Added File Zope3/lib/python/Zope/Server/Logger/ResolvingLogger.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: ResolvingLogger.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""
from ILogger import ILogger


class ResolvingLogger:
    """Feed (ip, message) combinations into this logger to get a
    resolved hostname in front of the message.  The message will not
    be logged until the PTR request finishes (or fails)."""

    __implements__ = ILogger

    def __init__ (self, resolver, logger):
        self.resolver = resolver
        self.logger = logger


    class logger_thunk:
        def __init__ (self, message, logger):
            self.message = message
            self.logger = logger

        def __call__ (self, host, ttl, answer):
            if not answer:
                answer = host
            self.logger.log ('%s: %s' % (answer, self.message))


    ############################################################
    # Implementation methods for interface
    # Zope.Server.Logger.ILogger

    def log(self, ip, message):
        'See Zope.Server.Logger.ILogger.ILogger'
        self.resolver.resolve_ptr (
                ip,
                self.logger_thunk (
                        message,
                        self.logger
                        )
                )
    #
    ############################################################


=== Added File Zope3/lib/python/Zope/Server/Logger/RotatingFileLogger.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: RotatingFileLogger.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""

import time
import os
import stat

from FileLogger import FileLogger

class RotatingFileLogger(FileLogger):
    """ If freq is non-None we back up 'daily', 'weekly', or
        'monthly'.  Else if maxsize is non-None we back up whenever
        the log gets to big.  If both are None we never back up.

        Like a FileLogger, but it must be attached to a filename.
        When the log gets too full, or a certain time has passed, it
        backs up the log and starts a new one.  Note that backing up
        the log is done via 'mv' because anything else (cp, gzip)
        would take time, during which medusa would do nothing else.
    """

    __implements__ = FileLogger.__implements__


    def __init__ (self, file, freq=None, maxsize=None, flush=1, mode='a'):
        self.filename = file
        self.mode = mode
        self.file = open (file, mode)
        self.freq = freq
        self.maxsize = maxsize
        self.rotate_when = self.next_backup(self.freq)
        self.do_flush = flush


    def __repr__ (self):
        return '<rotating-file logger: %s>' % self.file


    # We back up at midnight every 1) day, 2) monday, or 3) 1st of month
    def next_backup (self, freq):
        (yr, mo, day, hr, min, sec, wd, jday, dst) = \
             time.localtime(time.time())
        if freq == 'daily':
            return time.mktime((yr,mo,day+1, 0,0,0, 0,0,-1))
        elif freq == 'weekly':
            # wd(monday)==0
            return time.mktime((yr,mo,day-wd+7, 0,0,0, 0,0,-1))
        elif freq == 'monthly':
            return time.mktime((yr,mo+1,1, 0,0,0, 0,0,-1))
        else:
            return None                  # not a date-based backup


    def maybe_flush (self):              # rotate first if necessary
        self.maybe_rotate()
        if self.do_flush:                # from file_logger()
            self.file.flush()


    def maybe_rotate (self):
        if self.freq and time.time() > self.rotate_when:
            self.rotate()
            self.rotate_when = self.next_backup(self.freq)
        elif self.maxsize:               # rotate when we get too big
            try:
                if os.stat(self.filename)[stat.ST_SIZE] > self.maxsize:
                    self.rotate()
            except os.error:             # file not found, probably
                self.rotate()            # will create a new file


    def rotate (self):
        (yr, mo, day, hr, min, sec, wd, jday, dst) = \
             time.localtime(time.time())
        try:
            self.file.close()
            newname = '%s.ends%04d%02d%02d' % (self.filename, yr, mo, day)
            try:
                open(newname, "r").close()      # check if file exists
                newname = newname + "-%02d%02d%02d" % (hr, min, sec)
            except:                             # YEARMODY is unique
                pass
            os.rename(self.filename, newname)
            self.file = open(self.filename, self.mode)
        except:
            pass


=== Added File Zope3/lib/python/Zope/Server/Logger/SocketLogger.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: SocketLogger.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""

import asynchat
import socket

from ILogger import ILogger


class SocketLogger (asynchat.async_chat):
    """Log to a stream socket, asynchronously."""

    __implements__ = ILogger

    def __init__ (self, address):

        if type(address) == type(''):
            self.create_socket (socket.AF_UNIX, socket.SOCK_STREAM)
        else:
            self.create_socket (socket.AF_INET, socket.SOCK_STREAM)

        self.connect (address)
        self.address = address


    def __repr__ (self):
        return '<socket logger: address=%s>' % (self.address)


    ############################################################
    # Implementation methods for interface
    # Zope.Server.Logger.ILogger

    def log(self, message):
        'See Zope.Server.Logger.ILogger.ILogger'
        if message[-2:] != '\r\n':
            self.socket.push (message + '\r\n')
        else:
            self.socket.push (message)

    #
    ############################################################


=== Added File Zope3/lib/python/Zope/Server/Logger/SyslogLogger.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: SyslogLogger.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""

import os
import m_syslog

from ILogger import ILogger


class SyslogLogger(m_syslog.syslog_client):
    """syslog is a line-oriented log protocol - this class would be
       appropriate for FTP or HTTP logs, but not for dumping stderr
       to.

       XXX: a simple safety wrapper that will ensure that the line
       sent to syslog is reasonable.

       XXX: async version of syslog_client: now, log entries use
       blocking send()
    """

    __implements__ = ILogger

    svc_name = 'zope'
    pid_str  = str(os.getpid())

    def __init__ (self, address, facility='user'):
        m_syslog.syslog_client.__init__ (self, address)
        self.facility = m_syslog.facility_names[facility]
        self.address=address


    def __repr__ (self):
        return '<syslog logger address=%s>' % (repr(self.address))


    ############################################################
    # Implementation methods for interface
    # Zope.Server.Logger.ILogger

    def log(self, message):
        'See Zope.Server.Logger.ILogger.ILogger'
        m_syslog.syslog_client.log (
            self,
            '%s[%s]: %s' % (self.svc_name, self.pid_str, message),
            facility=self.facility,
            priority=m_syslog.LOG_INFO
            )

    #
    ############################################################


=== Added File Zope3/lib/python/Zope/Server/Logger/TailLogger.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: TailLogger.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""

from ILogger import ILogger


class TailLogger:
    """Keep track of the last <size> log messages"""

    __implements__ = ILogger

    def __init__ (self, logger, size=500):
        self.size = size
        self.logger = logger
        self.messages = []


    ############################################################
    # Implementation methods for interface
    # Zope.Server.Logger.ILogger

    def log(self, message):
        'See Zope.Server.Logger.ILogger.ILogger'
        self.messages.append (strip_eol (message))
        if len (self.messages) > self.size:
            del self.messages[0]
        self.logger.log (message)

    #
    ############################################################


def strip_eol (line):
    while line and line[-1] in '\r\n':
        line = line[:-1]
    return line


=== Added File Zope3/lib/python/Zope/Server/Logger/UnresolvingLogger.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: UnresolvingLogger.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""
from ILogger import ILogger


class UnresolvingLogger:
    """Just in case you don't want to resolve"""

    __implements__ = ILogger

    def __init__ (self, logger):
        self.logger = logger


    ############################################################
    # Implementation methods for interface
    # Zope.Server.Logger.ILogger

    def log(self, ip, message):
        'See Zope.Server.Logger.ILogger.ILogger'
        self.logger.log ('%s: %s' % (ip, message))

    #
    ############################################################


=== Added File Zope3/lib/python/Zope/Server/Logger/__init__.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""

$Id: __init__.py,v 1.1.4.1 2002/04/12 21:30:58 shane Exp $
"""


=== Added File Zope3/lib/python/Zope/Server/Logger/m_syslog.py ===
# -*- Mode: Python; tab-width: 4 -*-

# ======================================================================
# Copyright 1997 by Sam Rushing
#
#                         All Rights Reserved
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose and without fee is hereby
# granted, provided that the above copyright notice appear in all
# copies and that both that copyright notice and this permission
# notice appear in supporting documentation, and that the name of Sam
# Rushing not be used in advertising or publicity pertaining to
# distribution of the software without specific, written prior
# permission.
#
# SAM RUSHING DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
# INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
# NO EVENT SHALL SAM RUSHING BE LIABLE FOR ANY SPECIAL, INDIRECT OR
# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
# ======================================================================

"""socket interface to unix syslog.
On Unix, there are usually two ways of getting to syslog: via a
local unix-domain socket, or via the TCP service.

Usually "/dev/log" is the unix domain socket.  This may be different
for other systems.

>>> my_client = syslog_client ('/dev/log')

Otherwise, just use the UDP version, port 514.

>>> my_client = syslog_client (('my_log_host', 514))

On win32, you will have to use the UDP version.  Note that
you can use this to log to other hosts (and indeed, multiple
hosts).

This module is not a drop-in replacement for the python
<syslog> extension module - the interface is different.

Usage:

>>> c = syslog_client()
>>> c = syslog_client ('/strange/non_standard_log_location')
>>> c = syslog_client (('other_host.com', 514))
>>> c.log ('testing', facility='local0', priority='debug')

"""

# TODO: support named-pipe syslog.
# [see ftp://sunsite.unc.edu/pub/Linux/system/Daemons/syslog-fifo.tar.z]

# from <linux/sys/syslog.h>:
# ===========================================================================
# priorities/facilities are encoded into a single 32-bit quantity, where the
# bottom 3 bits are the priority (0-7) and the top 28 bits are the facility
# (0-big number).  Both the priorities and the facilities map roughly
# one-to-one to strings in the syslogd(8) source code.  This mapping is
# included in this file.
#
# priorities (these are ordered)

LOG_EMERG                = 0                #  system is unusable
LOG_ALERT                = 1                #  action must be taken immediately
LOG_CRIT                = 2                #  critical conditions
LOG_ERR                        = 3                #  error conditions
LOG_WARNING                = 4                #  warning conditions
LOG_NOTICE                = 5                #  normal but significant condition
LOG_INFO                = 6                #  informational
LOG_DEBUG                = 7                #  debug-level messages

#  facility codes
LOG_KERN                = 0                #  kernel messages
LOG_USER                = 1                #  random user-level messages
LOG_MAIL                = 2                #  mail system
LOG_DAEMON                = 3                #  system daemons
LOG_AUTH                = 4                #  security/authorization messages
LOG_SYSLOG                = 5                #  messages generated internally by syslogd
LOG_LPR                        = 6                #  line printer subsystem
LOG_NEWS                = 7                #  network news subsystem
LOG_UUCP                = 8                #  UUCP subsystem
LOG_CRON                = 9                #  clock daemon
LOG_AUTHPRIV        = 10        #  security/authorization messages (private)

#  other codes through 15 reserved for system use
LOG_LOCAL0                = 16                #  reserved for local use
LOG_LOCAL1                = 17                #  reserved for local use
LOG_LOCAL2                = 18                #  reserved for local use
LOG_LOCAL3                = 19                #  reserved for local use
LOG_LOCAL4                = 20                #  reserved for local use
LOG_LOCAL5                = 21                #  reserved for local use
LOG_LOCAL6                = 22                #  reserved for local use
LOG_LOCAL7                = 23                #  reserved for local use

priority_names = {
        "alert":        LOG_ALERT,
        "crit":                LOG_CRIT,
        "debug":        LOG_DEBUG,
        "emerg":        LOG_EMERG,
        "err":                LOG_ERR,
        "error":        LOG_ERR,                #  DEPRECATED
        "info":                LOG_INFO,
        "notice":        LOG_NOTICE,
        "panic":         LOG_EMERG,                #  DEPRECATED
        "warn":                LOG_WARNING,                #  DEPRECATED
        "warning":        LOG_WARNING,
        }

facility_names = {
        "auth":                LOG_AUTH,
        "authpriv":        LOG_AUTHPRIV,
        "cron":         LOG_CRON,
        "daemon":        LOG_DAEMON,
        "kern":                LOG_KERN,
        "lpr":                LOG_LPR,
        "mail":                LOG_MAIL,
        "news":                LOG_NEWS,
        "security":        LOG_AUTH,                #  DEPRECATED
        "syslog":        LOG_SYSLOG,
        "user":                LOG_USER,
        "uucp":                LOG_UUCP,
        "local0":        LOG_LOCAL0,
        "local1":        LOG_LOCAL1,
        "local2":        LOG_LOCAL2,
        "local3":        LOG_LOCAL3,
        "local4":        LOG_LOCAL4,
        "local5":        LOG_LOCAL5,
        "local6":        LOG_LOCAL6,
        "local7":        LOG_LOCAL7,
        }

import socket

class syslog_client:

    def __init__ (self, address='/dev/log'):
        self.address = address
        if type (address) == type(''):
            try: # APUE 13.4.2 specifes /dev/log as datagram socket
                self.socket = socket.socket( socket.AF_UNIX
                                                       , socket.SOCK_DGRAM)
                self.socket.connect (address)
            except: # older linux may create as stream socket
                self.socket = socket.socket( socket.AF_UNIX
                                                       , socket.SOCK_STREAM)
                self.socket.connect (address)
            self.unix = 1
        else:
            self.socket = socket.socket( socket.AF_INET
                                                   , socket.SOCK_DGRAM)
            self.unix = 0


    log_format_string = '<%d>%s\000'

    def log (self, message, facility=LOG_USER, priority=LOG_INFO):
        message = self.log_format_string % (
                self.encode_priority (facility, priority),
                message
                )
        if self.unix:
            self.socket.send (message)
        else:
            self.socket.sendto (message, self.address)

    def encode_priority (self, facility, priority):
        if type(facility) == type(''):
            facility = facility_names[facility]
        if type(priority) == type(''):
            priority = priority_names[priority]
        return (facility<<3) | priority

    def close (self):
        if self.unix:
            self.socket.close()