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#
# initial_setup_log.py: Support for logging to syslog during the
# Initial Setup run
#
# Copyright (C) 2014 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): Martin Kolman <mkolman@redhat.com>
import logging
from logging.handlers import SysLogHandler, SYSLOG_UDP_PORT
LOG_LEVEL_MAP = {"warning": logging.WARNING,
"info": logging.INFO,
"debug": logging.DEBUG
}
class InitialSetupSyslogHandler(SysLogHandler):
"""A SysLogHandler subclass that makes sure the Initial Setup
messages are easy to identify in the syslog/Journal
"""
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
# this is needed to properly show the "initial-setup" prefix
# for log messages in syslog/Journal
record.msg = '%s: %s' % (self.tag, original_msg)
SysLogHandler.emit(self, record)
record.msg = original_msg
def parse_log_level(log_level_name):
"""Covert a string to log level constant.
We only support "warning", "info" and "critical".
:param str log_level_name: lowercase log level name
:returns: log level constants, logging.DEBUG if log level name is unknown
"""
return LOG_LEVEL_MAP.get(log_level_name, logging.DEBUG)
def init(stdout_log, stdout_log_level):
"""Initialize the Initial Setup logging system.
:param bool stdout_log: if stdout log should be initialized
:param str stdout_log_level: log level name for the stdout log
"""
log = logging.getLogger("initial-setup")
log.setLevel(logging.DEBUG)
syslogHandler = InitialSetupSyslogHandler('/dev/log', SysLogHandler.LOG_LOCAL1, "initial-setup")
syslogHandler.setLevel(logging.DEBUG)
log.addHandler(syslogHandler)
if stdout_log:
# also log to stdout because someone is apparently running Initial Setup manually,
# probably for debugging purposes
stdoutHandler = logging.StreamHandler()
stdoutHandler.setLevel(parse_log_level(stdout_log_level))
stdoutHandler.setFormatter(logging.Formatter('%(levelname)s %(name)s: %(message)s'))
log.addHandler(stdoutHandler)