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# logging.py
# DNF Logging Subsystem.
#
# Copyright (C) 2013-2016 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties 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. Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
from __future__ import absolute_import
from __future__ import unicode_literals
import dnf.exceptions
import dnf.const
import dnf.lock
import dnf.util
import libdnf.repo
import logging
import logging.handlers
import os
import sys
import time
import warnings
import gzip
# :api loggers are: 'dnf', 'dnf.plugin', 'dnf.rpm'
SUPERCRITICAL = 100 # do not use this for logging
CRITICAL = logging.CRITICAL
ERROR = logging.ERROR
WARNING = logging.WARNING
INFO = logging.INFO
DEBUG = logging.DEBUG
DDEBUG = 8 # used by anaconda (pyanaconda/payload/dnfpayload.py)
SUBDEBUG = 6
TRACE = 4
ALL = 2
def only_once(func):
"""Method decorator turning the method into noop on second or later calls."""
def noop(*_args, **_kwargs):
pass
def swan_song(self, *args, **kwargs):
func(self, *args, **kwargs)
setattr(self, func.__name__, noop)
return swan_song
class _MaxLevelFilter(object):
def __init__(self, max_level):
self.max_level = max_level
def filter(self, record):
if record.levelno >= self.max_level:
return 0
return 1
_VERBOSE_VAL_MAPPING = {
0 : SUPERCRITICAL,
1 : logging.INFO,
2 : logging.INFO, # the default
3 : logging.DEBUG,
4 : logging.DEBUG,
5 : logging.DEBUG,
6 : logging.DEBUG, # verbose value
7 : DDEBUG,
8 : SUBDEBUG,
9 : TRACE,
10: ALL, # more verbous librepo and hawkey
}
def _cfg_verbose_val2level(cfg_errval):
assert 0 <= cfg_errval <= 10
return _VERBOSE_VAL_MAPPING.get(cfg_errval, TRACE)
# Both the DNF default and the verbose default are WARNING. Note that ERROR has
# no specific level.
_ERR_VAL_MAPPING = {
0: SUPERCRITICAL,
1: logging.CRITICAL,
2: logging.ERROR
}
def _cfg_err_val2level(cfg_errval):
assert 0 <= cfg_errval <= 10
return _ERR_VAL_MAPPING.get(cfg_errval, logging.WARNING)
def compression_namer(name):
return name + ".gz"
CHUNK_SIZE = 128 * 1024 # 128 KB
def compression_rotator(source, dest):
with open(source, "rb") as sf:
with gzip.open(dest, 'wb') as wf:
while True:
data = sf.read(CHUNK_SIZE)
if not data:
break
wf.write(data)
os.remove(source)
class MultiprocessRotatingFileHandler(logging.handlers.RotatingFileHandler):
def __init__(self, filename, mode='a', maxBytes=0, backupCount=0, encoding=None, delay=False):
super(MultiprocessRotatingFileHandler, self).__init__(
filename, mode, maxBytes, backupCount, encoding, delay)
self.rotate_lock = dnf.lock.build_log_lock("/var/log/", True)
def emit(self, record):
while True:
try:
if self.shouldRollover(record):
with self.rotate_lock:
# Do rollover while preserving the mode of the new log file
mode = os.stat(self.baseFilename).st_mode
self.doRollover()
os.chmod(self.baseFilename, mode)
logging.FileHandler.emit(self, record)
return
except (dnf.exceptions.ProcessLockError, dnf.exceptions.ThreadLockError):
time.sleep(0.01)
except Exception:
self.handleError(record)
return
def _create_filehandler(logfile, log_size, log_rotate, log_compress):
if not os.path.exists(logfile):
dnf.util.ensure_dir(os.path.dirname(logfile))
dnf.util.touch(logfile)
handler = MultiprocessRotatingFileHandler(logfile, maxBytes=log_size, backupCount=log_rotate)
formatter = logging.Formatter("%(asctime)s %(levelname)s %(message)s",
"%Y-%m-%dT%H:%M:%S%z")
formatter.converter = time.localtime
handler.setFormatter(formatter)
if log_compress:
handler.rotator = compression_rotator
handler.namer = compression_namer
return handler
def _paint_mark(logger):
logger.log(INFO, dnf.const.LOG_MARKER)
class Logging(object):
def __init__(self):
self.stdout_handler = self.stderr_handler = None
logging.addLevelName(DDEBUG, "DDEBUG")
logging.addLevelName(SUBDEBUG, "SUBDEBUG")
logging.addLevelName(TRACE, "TRACE")
logging.addLevelName(ALL, "ALL")
logging.captureWarnings(True)
logging.raiseExceptions = False
@only_once
def _presetup(self):
logger_dnf = logging.getLogger("dnf")
logger_dnf.setLevel(TRACE)
# setup stdout
stdout = logging.StreamHandler(sys.stdout)
stdout.setLevel(INFO)
stdout.addFilter(_MaxLevelFilter(logging.WARNING))
logger_dnf.addHandler(stdout)
self.stdout_handler = stdout
# setup stderr
stderr = logging.StreamHandler(sys.stderr)
stderr.setLevel(WARNING)
logger_dnf.addHandler(stderr)
self.stderr_handler = stderr
@only_once
def _setup_file_loggers(self, logfile_level, logdir, log_size, log_rotate, log_compress):
logger_dnf = logging.getLogger("dnf")
logger_dnf.setLevel(TRACE)
# setup file logger
logfile = os.path.join(logdir, dnf.const.LOG)
handler = _create_filehandler(logfile, log_size, log_rotate, log_compress)
handler.setLevel(logfile_level)
logger_dnf.addHandler(handler)
# setup Python warnings
logger_warnings = logging.getLogger("py.warnings")
logger_warnings.addHandler(handler)
logger_librepo = logging.getLogger("librepo")
logger_librepo.setLevel(TRACE)
logfile = os.path.join(logdir, dnf.const.LOG_LIBREPO)
handler = _create_filehandler(logfile, log_size, log_rotate, log_compress)
logger_librepo.addHandler(handler)
libdnf.repo.LibrepoLog.addHandler(logfile, logfile_level <= ALL)
# setup RPM callbacks logger
logger_rpm = logging.getLogger("dnf.rpm")
logger_rpm.propagate = False
logger_rpm.setLevel(SUBDEBUG)
logfile = os.path.join(logdir, dnf.const.LOG_RPM)
handler = _create_filehandler(logfile, log_size, log_rotate, log_compress)
logger_rpm.addHandler(handler)
@only_once
def _setup(self, verbose_level, error_level, logfile_level, logdir, log_size, log_rotate, log_compress):
self._presetup()
self._setup_file_loggers(logfile_level, logdir, log_size, log_rotate, log_compress)
logger_warnings = logging.getLogger("py.warnings")
logger_warnings.addHandler(self.stderr_handler)
# setup RPM callbacks logger
logger_rpm = logging.getLogger("dnf.rpm")
logger_rpm.addHandler(self.stdout_handler)
logger_rpm.addHandler(self.stderr_handler)
logger_dnf = logging.getLogger("dnf")
# temporarily turn off stdout/stderr handlers:
self.stdout_handler.setLevel(WARNING)
self.stderr_handler.setLevel(WARNING)
_paint_mark(logger_dnf)
_paint_mark(logger_rpm)
# bring std handlers to the preferred level
self.stdout_handler.setLevel(verbose_level)
self.stderr_handler.setLevel(error_level)
def _setup_from_dnf_conf(self, conf, file_loggers_only=False):
verbose_level_r = _cfg_verbose_val2level(conf.debuglevel)
error_level_r = _cfg_err_val2level(conf.errorlevel)
logfile_level_r = _cfg_verbose_val2level(conf.logfilelevel)
logdir = conf.logdir
log_size = conf.log_size
log_rotate = conf.log_rotate
log_compress = conf.log_compress
if file_loggers_only:
return self._setup_file_loggers(logfile_level_r, logdir, log_size, log_rotate, log_compress)
else:
return self._setup(
verbose_level_r, error_level_r, logfile_level_r, logdir, log_size, log_rotate, log_compress)
class Timer(object):
def __init__(self, what):
self.what = what
self.start = time.time()
def __call__(self):
diff = time.time() - self.start
msg = 'timer: %s: %d ms' % (self.what, diff * 1000)
logging.getLogger("dnf").log(DDEBUG, msg)
_LIBDNF_TO_DNF_LOGLEVEL_MAPPING = {
libdnf.utils.Logger.Level_CRITICAL: CRITICAL,
libdnf.utils.Logger.Level_ERROR: ERROR,
libdnf.utils.Logger.Level_WARNING: WARNING,
libdnf.utils.Logger.Level_NOTICE: INFO,
libdnf.utils.Logger.Level_INFO: INFO,
libdnf.utils.Logger.Level_DEBUG: DEBUG,
libdnf.utils.Logger.Level_TRACE: TRACE
}
class LibdnfLoggerCB(libdnf.utils.Logger):
def __init__(self):
super(LibdnfLoggerCB, self).__init__()
self._dnf_logger = logging.getLogger("dnf")
self._librepo_logger = logging.getLogger("librepo")
def write(self, source, *args):
"""Log message.
source -- integer, defines origin (libdnf, librepo, ...) of message, 0 - unknown
"""
if len(args) == 2:
level, message = args
elif len(args) == 4:
time, pid, level, message = args
if source == libdnf.utils.Logger.LOG_SOURCE_LIBREPO:
self._librepo_logger.log(_LIBDNF_TO_DNF_LOGLEVEL_MAPPING[level], message)
else:
self._dnf_logger.log(_LIBDNF_TO_DNF_LOGLEVEL_MAPPING[level], message)
libdnfLoggerCB = LibdnfLoggerCB()
libdnf.utils.Log.setLogger(libdnfLoggerCB)