/usr/share/pyshared/ovs/vlog.py is in python-openvswitch 1.4.2+git20120612-9.1~deb7u1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | # Copyright (c) 2011 Nicira Networks
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import datetime
import logging
import logging.handlers
import socket
import sys
import ovs.dirs
import ovs.util
FACILITIES = {"console": "info", "file": "info", "syslog": "info"}
LEVELS = {
"dbg": logging.DEBUG,
"info": logging.INFO,
"warn": logging.WARNING,
"err": logging.ERROR,
"emer": logging.CRITICAL,
"off": logging.CRITICAL
}
def get_level(level_str):
return LEVELS.get(level_str.lower())
class Vlog:
__inited = False
__msg_num = 0
__mfl = {} # Module -> facility -> level
def __init__(self, name):
"""Creates a new Vlog object representing a module called 'name'. The
created Vlog object will do nothing until the Vlog.init() static method
is called. Once called, no more Vlog objects may be created."""
assert not Vlog.__inited
self.name = name.lower()
if name not in Vlog.__mfl:
Vlog.__mfl[self.name] = FACILITIES.copy()
def __log(self, level, message, **kwargs):
if not Vlog.__inited:
return
now = datetime.datetime.now().strftime("%b %d %H:%M:%S")
message = ("%s|%s|%s|%s|%s"
% (now, Vlog.__msg_num, self.name, level, message))
level = LEVELS.get(level.lower(), logging.DEBUG)
Vlog.__msg_num += 1
for f, f_level in Vlog.__mfl[self.name].iteritems():
f_level = LEVELS.get(f_level, logging.CRITICAL)
if level >= f_level:
logging.getLogger(f).log(level, message, **kwargs)
def emer(self, message, **kwargs):
self.__log("EMER", message, **kwargs)
def err(self, message, **kwargs):
self.__log("ERR", message, **kwargs)
def warn(self, message, **kwargs):
self.__log("WARN", message, **kwargs)
def info(self, message, **kwargs):
self.__log("INFO", message, **kwargs)
def dbg(self, message, **kwargs):
self.__log("DBG", message, **kwargs)
def exception(self, message):
"""Logs 'message' at ERR log level. Includes a backtrace when in
exception context."""
self.err(message, exc_info=True)
@staticmethod
def init(log_file=None):
"""Intializes the Vlog module. Causes Vlog to write to 'log_file' if
not None. Should be called after all Vlog objects have been created.
No logging will occur until this function is called."""
if Vlog.__inited:
return
Vlog.__inited = True
logging.raiseExceptions = False
for f in FACILITIES:
logger = logging.getLogger(f)
logger.setLevel(logging.DEBUG)
try:
if f == "console":
logger.addHandler(logging.StreamHandler(sys.stderr))
elif f == "syslog":
logger.addHandler(logging.handlers.SysLogHandler(
address="/dev/log",
facility=logging.handlers.SysLogHandler.LOG_DAEMON))
elif f == "file" and log_file:
logger.addHandler(logging.FileHandler(log_file))
except (IOError, socket.error):
logger.setLevel(logging.CRITICAL)
@staticmethod
def set_level(module, facility, level):
""" Sets the log level of the 'module'-'facility' tuple to 'level'.
All three arguments are strings which are interpreted the same as
arguments to the --verbose flag. Should be called after all Vlog
objects have already been created."""
module = module.lower()
facility = facility.lower()
level = level.lower()
if facility != "any" and facility not in FACILITIES:
return
if module != "any" and module not in Vlog.__mfl:
return
if level not in LEVELS:
return
if module == "any":
modules = Vlog.__mfl.keys()
else:
modules = [module]
if facility == "any":
facilities = FACILITIES.keys()
else:
facilities = [facility]
for m in modules:
for f in facilities:
Vlog.__mfl[m][f] = level
def add_args(parser):
"""Adds vlog related options to 'parser', an ArgumentParser object. The
resulting arguments parsed by 'parser' should be passed to handle_args."""
group = parser.add_argument_group(title="Logging Options")
group.add_argument("--log-file", nargs="?", const="default",
help="Enables logging to a file. Default log file"
" is used if LOG_FILE is omitted.")
group.add_argument("-v", "--verbose", nargs="*",
help="Sets logging levels, see ovs-vswitchd(8)."
" Defaults to ANY:ANY:dbg.")
def handle_args(args):
""" Handles command line arguments ('args') parsed by an ArgumentParser.
The ArgumentParser should have been primed by add_args(). Also takes care
of initializing the Vlog module."""
log_file = args.log_file
if log_file == "default":
log_file = "%s/%s.log" % (ovs.dirs.LOGDIR, ovs.util.PROGRAM_NAME)
if args.verbose is None:
args.verbose = []
elif args.verbose == []:
args.verbose = ["any:any:dbg"]
for verbose in args.verbose:
args = verbose.split(':')
if len(args) >= 3:
level = args[2]
else:
level = "dbg"
if len(args) >= 2:
facility = args[1]
else:
facility = "any"
if len(args) >= 1:
module = args[0]
else:
module = "any"
Vlog.set_level(module, facility, level)
Vlog.init(log_file)
|