log.py

"""
Module for logging, part of virt-who

Copyright (C) 2011 Radek Novacek <rnovacek@redhat.com>

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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
"""


import logging
import logging.handlers
import os
import sys

def getLogger(debug):
    logger = logging.getLogger("rhsm-app")
    logger.setLevel(logging.DEBUG)

    path = '/var/log/rhsm/rhsm.log'
    try:
        if not os.path.isdir("/var/log/rhsm"):
            os.mkdir("/var/log/rhsm")
    except:
        pass

    # Try to write to /var/log, fallback on console logging:
    try:
        fileHandler = logging.handlers.RotatingFileHandler(path, maxBytes=0x100000, backupCount=5)
        fileHandler.setFormatter(logging.Formatter('%(asctime)s [%(levelname)s]  @%(filename)s:%(lineno)d - %(message)s'))
        if debug:
            fileHandler.setLevel(logging.DEBUG)
        else:
            fileHandler.setLevel(logging.INFO)
        logger.addHandler(fileHandler)
    except Exception, e:
        sys.stderr.write("Unable to log to %s: %s\n" % (path, e))

    streamHandler = logging.StreamHandler()
    streamHandler.setFormatter(logging.Formatter('%(levelname)s: %(message)s'))
    if debug:
        streamHandler.setLevel(logging.DEBUG)
    else:
        streamHandler.setLevel(logging.INFO)

        # Don't print exceptions to stdout in non-debug mode
        f = logging.Filter()
        f.filter = lambda record: record.exc_info is None
        streamHandler.addFilter(f)

    logger.addHandler(streamHandler)

    return logger