core-admin/qubes/log.py

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2014-11-17 16:25:14 +01:00
#!/usr/bin/python2 -O
# -*- coding: utf-8 -*-
'''Qubes logging routines
See also: :py:attr:`qubes.vm.qubesvm.QubesVM.logger`
'''
import logging
import os
import sys
FORMAT_CONSOLE = '%(message)s'
FORMAT_LOG = '%(asctime)s %(message)s'
FORMAT_DEBUG = '%(asctime)s [%(processName)s %(module)s.%(funcName)s:%(lineno)d] %(name)s: %(message)s'
LOGPATH = '/var/log/qubes'
LOGFILE = os.path.join(LOGPATH, 'qubes.log')
formatter_console = logging.Formatter(FORMAT_CONSOLE)
formatter_log = logging.Formatter(FORMAT_LOG)
formatter_debug = logging.Formatter(FORMAT_DEBUG)
def enable():
'''Enable global logging
Use :py:mod:`logging` module from standard library to log messages.
>>> import qubes.log
>>> qubes.log.enable() # doctest: +SKIP
>>> import logging
>>> logging.warning('Foobar') # doctest: +SKIP
'''
if logging.root.handlers:
return
handler_console = logging.StreamHandler(sys.stderr)
handler_console.setFormatter(formatter_console)
logging.root.addHandler(handler_console)
handler_log = logging.FileHandler('log', 'a', encoding='utf-8')
handler_log.setFormatter(formatter_log)
logging.root.addHandler(handler_log)
logging.root.setLevel(logging.INFO)
def enable_debug():
'''Enable debug logging
Enable more messages and additional info to message format.
'''
enable()
logging.root.setLevel(logging.DEBUG)
for handler in logging.root.handlers:
handler.setFormatter(formatter_debug)
def get_vm_logger(vmname):
'''Initialise logging for particular VM name
:param str vmname: VM's name
:rtype: :py:class:`logging.Logger`
'''
logger = logging.getLogger('vm.' + vmname)
handler = logging.FileHandler(os.path.join(LOGPATH, 'vm', vmname + '.log'))
handler.setFormatter(formatter_log)
logger.addHandler(handler)
return logger