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#
# anaconda_log.py: Support for logging to multiple destinations with log
# levels.
#
# Copyright (C) 2000, 2001, 2002, 2005 Red Hat, Inc. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Author(s): Chris Lumens <clumens@redhat.com>
# Matt Wilson <msw@redhat.com>
# Michael Fulbright <msf@redhat.com>
#
import os
import signal
import sys
import logging
from logging.handlers import SysLogHandler, SYSLOG_UDP_PORT
import types
import iutil
DEFAULT_TTY_LEVEL = logging.INFO
ENTRY_FORMAT = "%(asctime)s,%(msecs)03d %(levelname)s %(name)s: %(message)s"
TTY_FORMAT = "%(levelname)s %(name)s: %(message)s"
STDOUT_FORMAT = "%(asctime)s %(message)s"
DATE_FORMAT = "%H:%M:%S"
MAIN_LOG_FILE = "/tmp/anaconda.log"
MAIN_LOG_TTY = "/dev/tty3"
PROGRAM_LOG_FILE = "/tmp/program.log"
ANACONDA_SYSLOG_FACILITY = SysLogHandler.LOG_LOCAL1
logLevelMap = {"debug": logging.DEBUG, "info": logging.INFO,
"warning": logging.WARNING, "error": logging.ERROR,
"critical": logging.CRITICAL}
# sets autoSetLevel for the given handler
def autoSetLevel(handler, value):
handler.autoSetLevel = value
# all handlers of given logger with autoSetLevel == True are set to level
def setHandlersLevel(logger, level):
map(lambda hdlr: hdlr.setLevel(level),
filter (lambda hdlr: hasattr(hdlr, "autoSetLevel") and hdlr.autoSetLevel, logger.handlers))
class AnacondaSyslogHandler(SysLogHandler):
def __init__(self,
address=('localhost', SYSLOG_UDP_PORT),
facility=SysLogHandler.LOG_USER,
tag=''):
self.tag = tag
SysLogHandler.__init__(self, address, facility)
def emit(self, record):
original_msg = record.msg
record.msg = '%s: %s' %(self.tag, original_msg)
SysLogHandler.emit(self, record)
record.msg = original_msg
class AnacondaLog:
def __init__ (self):
self.tty_loglevel = DEFAULT_TTY_LEVEL
self.remote_syslog = None
# Create the base of the logger hierarcy.
logger = logging.getLogger("anaconda")
logger.setLevel(logging.DEBUG)
self.addFileHandler(MAIN_LOG_FILE, logger,
minLevel=logging.DEBUG)
self.forwardToSyslog(logger)
# Log to tty3.
if not iutil.isS390() and os.access(MAIN_LOG_TTY, os.W_OK):
self.addFileHandler(MAIN_LOG_TTY, logger,
fmtStr=TTY_FORMAT,
autoLevel=True)
# External program output log
program_logger = logging.getLogger("program")
program_logger.setLevel(logging.DEBUG)
self.addFileHandler(PROGRAM_LOG_FILE, program_logger,
minLevel=logging.DEBUG)
self.forwardToSyslog(program_logger)
# Create a second logger for just the stuff we want to dup on
# stdout. Anything written here will also get passed up to the
# parent loggers for processing and possibly be written to the
# log.
stdoutLogger = logging.getLogger("anaconda.stdout")
stdoutLogger.setLevel(logging.INFO)
# Add a handler for the duped stuff. No fancy formatting, thanks.
self.addFileHandler(sys.stdout, stdoutLogger,
fmtStr=STDOUT_FORMAT, minLevel=logging.INFO)
# Stderr logger
stderrLogger = logging.getLogger("anaconda.stderr")
stderrLogger.setLevel(logging.INFO)
self.addFileHandler(sys.stderr, stderrLogger,
fmtStr=STDOUT_FORMAT, minLevel=logging.INFO)
# Add a simple handler - file or stream, depending on what we're given.
def addFileHandler (self, file, addToLogger, minLevel=DEFAULT_TTY_LEVEL,
fmtStr=ENTRY_FORMAT,
autoLevel=False):
if isinstance(file, types.StringTypes):
logfileHandler = logging.FileHandler(file)
else:
logfileHandler = logging.StreamHandler(file)
logfileHandler.setLevel(minLevel)
logfileHandler.setFormatter(logging.Formatter(fmtStr, DATE_FORMAT))
autoSetLevel(logfileHandler, autoLevel)
addToLogger.addHandler(logfileHandler)
# Add another logger to the hierarchy. For best results, make sure
# name falls under anaconda in the tree.
def addLogger (self, name, minLevel=DEFAULT_TTY_LEVEL):
newLogger = logging.getLogger(name)
newLogger.setLevel(minLevel)
# Add a handler for remote syslogs.
def addSysLogHandler (self, logger, host, port=SYSLOG_UDP_PORT,
minLevel=DEFAULT_TTY_LEVEL):
fmt = logging.Formatter("%(levelname)-8s %(message)s")
syslogHandler = SysLogHandler((host, port))
syslogHandler.setLevel(minLevel)
syslogHandler.setFormatter(fmt)
logger.addHandler(syslogHandler)
def forwardToSyslog(self, logger):
"""Forward everything that goes in the logger to the syslog daemon.
"""
syslogHandler = AnacondaSyslogHandler(
'/dev/log',
ANACONDA_SYSLOG_FACILITY,
logger.name)
syslogHandler.setLevel(logging.DEBUG)
logger.addHandler(syslogHandler)
def updateRemote(self, remote_syslog):
"""Updates the location of remote rsyslogd to forward to.
Requires updating rsyslogd config and sending SIGHUP to the daemon.
"""
PIDFILE = "/var/run/syslogd.pid"
CFGFILE = "/etc/rsyslog.conf"
TEMPLATE = "*.* @@%s\n"
self.remote_syslog = remote_syslog
with open(CFGFILE, 'a') as cfgfile:
forward_line = TEMPLATE % remote_syslog
cfgfile.write(forward_line)
with open(PIDFILE, 'r') as pidfile:
pid = int(pidfile.read())
os.kill(pid, signal.SIGHUP)
logger = AnacondaLog()
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