-# -*- Mode: python; indent-tabs-mode: nil -*- */
+# -*- Mode: python; coding:utf-8; indent-tabs-mode: nil -*- */
#
# This file is part of systemd.
#
-# Copyright 2012 David Strauss
+# Copyright 2012 David Strauss <david@davidstrauss.net>
+# Copyright 2012 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
+# Copyright 2012 Marti Raudsepp <marti@juffo.org>
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# You should have received a copy of the GNU Lesser General Public License
# along with systemd; If not, see <http://www.gnu.org/licenses/>.
+import sys as _sys
+import datetime as _datetime
+import functools as _functools
+import uuid as _uuid
import traceback as _traceback
import os as _os
+from os import SEEK_SET, SEEK_CUR, SEEK_END
import logging as _logging
+if _sys.version_info >= (3,):
+ from collections import ChainMap
from syslog import (LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR,
LOG_WARNING, LOG_NOTICE, LOG_INFO, LOG_DEBUG)
from ._journal import sendv, stream_fd
+from ._reader import (_Journal, NOP, APPEND, INVALIDATE,
+ LOCAL_ONLY, RUNTIME_ONLY, SYSTEM_ONLY)
+from . import id128 as _id128
+
+_MONOTONIC_CONVERTER = lambda x: _datetime.timedelta(microseconds=float(x))
+_REALTIME_CONVERTER = lambda x: _datetime.datetime.fromtimestamp(float(x)/1E6)
+DEFAULT_CONVERTERS = {
+ 'MESSAGE_ID': _uuid.UUID,
+ '_MACHINE_ID': _uuid.UUID,
+ '_BOOT_ID': _uuid.UUID,
+ 'PRIORITY': int,
+ 'LEADER': int,
+ 'SESSION_ID': int,
+ 'USERSPACE_USEC': int,
+ 'INITRD_USEC': int,
+ 'KERNEL_USEC': int,
+ '_UID': int,
+ '_GID': int,
+ '_PID': int,
+ 'SYSLOG_FACILITY': int,
+ 'SYSLOG_PID': int,
+ '_AUDIT_SESSION': int,
+ '_AUDIT_LOGINUID': int,
+ '_SYSTEMD_SESSION': int,
+ '_SYSTEMD_OWNER_UID': int,
+ 'CODE_LINE': int,
+ 'ERRNO': int,
+ 'EXIT_STATUS': int,
+ '_SOURCE_REALTIME_TIMESTAMP': _REALTIME_CONVERTER,
+ '__REALTIME_TIMESTAMP': _REALTIME_CONVERTER,
+ '_SOURCE_MONOTONIC_TIMESTAMP': _MONOTONIC_CONVERTER,
+ '__MONOTONIC_TIMESTAMP': _MONOTONIC_CONVERTER,
+ 'COREDUMP': bytes,
+ 'COREDUMP_PID': int,
+ 'COREDUMP_UID': int,
+ 'COREDUMP_GID': int,
+ 'COREDUMP_SESSION': int,
+ 'COREDUMP_SIGNAL': int,
+ 'COREDUMP_TIMESTAMP': _REALTIME_CONVERTER,
+}
+
+if _sys.version_info >= (3,):
+ _convert_unicode = _functools.partial(str, encoding='utf-8')
+else:
+ _convert_unicode = _functools.partial(unicode, encoding='utf-8')
+
+class Journal(_Journal):
+ def __init__(self, converters=None, flags=LOCAL_ONLY, path=None):
+ """Creates instance of Journal, which allows filtering and
+ return of journal entries.
+ Argument `converters` is a dictionary which updates the
+ DEFAULT_CONVERTERS to convert journal field values.
+ Argument `flags` sets open flags of the journal, which can be one
+ of, or ORed combination of constants: LOCAL_ONLY (default) opens
+ journal on local machine only; RUNTIME_ONLY opens only
+ volatile journal files; and SYSTEM_ONLY opens only
+ journal files of system services and the kernel.
+ Argument `path` is the directory of journal files. Note that
+ currently flags are ignored when `path` is present as they are
+ currently not relevant.
+ """
+ super(Journal, self).__init__(flags, path)
+ if _sys.version_info >= (3,3):
+ self.converters = ChainMap()
+ if converters is not None:
+ self.converters.maps.append(converters)
+ self.converters.maps.append(DEFAULT_CONVERTERS)
+ else:
+ self.converters = DEFAULT_CONVERTERS.copy()
+ if converters is not None:
+ self.converters.update(converters)
+
+ def _convert_field(self, key, value):
+ """ Convert value based on callable from self.converters
+ based of field/key"""
+ try:
+ result = self.converters[key](value)
+ except:
+ # Default conversion in unicode
+ try:
+ result = _convert_unicode(value)
+ except:
+ # Leave in default bytes
+ result = value
+ return result
+
+ def _convert_entry(self, entry):
+ """ Convert entire journal entry utilising _covert_field"""
+ result = {}
+ for key, value in entry.items():
+ if isinstance(value, list):
+ result[key] = [self._convert_field(key, val) for val in value]
+ else:
+ result[key] = self._convert_field(key, value)
+ return result
+
+ def add_match(self, *args, **kwargs):
+ """Add one or more matches to the filter journal log entries.
+ All matches of different field are combined in a logical AND,
+ and matches of the smae field are automatically combined in a
+ logical OR.
+ Matches can be passed as strings of form "field=value", or
+ keyword arguments field="value"."""
+ args = list(args)
+ args.extend(_make_line(key, val) for key, val in kwargs.items())
+ for arg in args:
+ super(Journal, self).add_match(arg)
+
+ def get_next(self, skip=1):
+ """Return dictionary of the next log entry. Optional skip value
+ will return the `skip`th log entry.
+ Returned will be journal entry dictionary processed with
+ converters."""
+ return self._convert_entry(
+ super(Journal, self).get_next(skip))
+
+ def query_unique(self, field):
+ """Returns a set of unique values in journal for given `field`,
+ processed with converters.
+ Note this does not respect any journal matches."""
+ return set(self._convert_field(field, value)
+ for value in super(Journal, self).query_unique(field))
+
+ def seek_realtime(self, realtime):
+ """Seek to nearest matching journal entry to `realtime`.
+ Argument `realtime` can must be either an integer unix timestamp
+ or datetime.datetime instance."""
+ if isinstance(realtime, _datetime.datetime):
+ realtime = float(realtime.strftime("%s.%f"))
+ return super(Journal, self).seek_realtime(realtime)
+
+ def seek_monotonic(self, monotonic, bootid=None):
+ """Seek to nearest matching journal entry to `monotonic`.
+ Argument `monotonic` is a timestamp from boot in either seconds
+ or a datetime.timedelta instance.
+ Argument `bootid` is a string or UUID representing which boot the
+ monotonic time is reference to. Defaults to current bootid."""
+ if isinstance(monotonic, _datetime.timedelta):
+ monotonic = monotonic.totalseconds()
+ if isinstance(bootid, _uuid.UUID):
+ bootid = bootid.get_hex()
+ return super(Journal, self).seek_monotonic(monotonic, bootid)
+
+ def log_level(self, level):
+ """Sets maximum log `level` by setting matches for PRIORITY."""
+ if 0 <= level <= 7:
+ for i in range(level+1):
+ self.add_match(PRIORITY="%s" % i)
+ else:
+ raise ValueError("Log level must be 0 <= level <= 7")
+
+ def this_boot(self, bootid=None):
+ """Add match for _BOOT_ID equal to current boot ID or the specified boot ID.
+
+ If specified, bootid should be either a UUID or a 32 digit hex number.
+
+ Equivalent to add_match(_BOOT_ID='bootid').
+ """
+ if bootid is None:
+ bootid = _id128.get_boot().hex
+ else:
+ bootid = getattr(bootid, 'hex', bootid)
+ self.add_match(_BOOT_ID=bootid)
+
+ def this_machine(self, machineid=None):
+ """Add match for _MACHINE_ID equal to the ID of this machine.
+
+ If specified, machineid should be either a UUID or a 32 digit hex number.
+
+ Equivalent to add_match(_MACHINE_ID='machineid').
+ """
+ if machineid is None:
+ machineid = _id128.get_machine().hex
+ else:
+ machineid = getattr(machineid, 'hex', machineid)
+ self.add_match(_MACHINE_ID=machineid)
+
def _make_line(field, value):
if isinstance(value, bytes):
def send(MESSAGE, MESSAGE_ID=None,
CODE_FILE=None, CODE_LINE=None, CODE_FUNC=None,
**kwargs):
- r"""Send a message to journald.
+ r"""Send a message to the journal.
>>> journal.send('Hello world')
>>> journal.send('Hello, again, world', FIELD2='Greetings!')
>>> journal.send('Binary message', BINARY=b'\xde\xad\xbe\xef')
Value of the MESSAGE argument will be used for the MESSAGE=
- field.
+ field. MESSAGE must be a string and will be sent as UTF-8 to
+ the journal.
MESSAGE_ID can be given to uniquely identify the type of
- message.
-
- Other parts of the message can be specified as keyword
- arguments.
-
- Both MESSAGE and MESSAGE_ID, if present, must be strings, and
- will be sent as UTF-8 to journal. Other arguments can be
- bytes, in which case they will be sent as-is to journal.
+ message. It must be a string or a uuid.UUID object.
CODE_LINE, CODE_FILE, and CODE_FUNC can be specified to
identify the caller. Unless at least on of the three is given,
send(). CODE_FILE and CODE_FUNC must be strings, CODE_LINE
must be an integer.
+ Additional fields for the journal entry can only be specified
+ as keyword arguments. The payload can be either a string or
+ bytes. A string will be sent as UTF-8, and bytes will be sent
+ as-is to the journal.
+
Other useful fields include PRIORITY, SYSLOG_FACILITY,
SYSLOG_IDENTIFIER, SYSLOG_PID.
"""
args = ['MESSAGE=' + MESSAGE]
if MESSAGE_ID is not None:
- args.append('MESSAGE_ID=' + MESSAGE_ID)
+ id = getattr(MESSAGE_ID, 'hex', MESSAGE_ID)
+ args.append('MESSAGE_ID=' + id)
if CODE_LINE == CODE_FILE == CODE_FUNC == None:
CODE_FILE, CODE_LINE, CODE_FUNC = \
<open file '<fdopen>', mode 'w' at 0x...>
>>> stream.write('message...\n')
- will produce the following message in the journal:
+ will produce the following message in the journal::
- PRIORITY=7
- SYSLOG_IDENTIFIER=myapp
- MESSAGE=message...
+ PRIORITY=7
+ SYSLOG_IDENTIFIER=myapp
+ MESSAGE=message...
Using the interface with print might be more convinient:
>>> from __future__ import print_function
>>> print('message...', file=stream)
- priority is the syslog priority, one of LOG_EMERG, LOG_ALERT,
- LOG_CRIT, LOG_ERR, LOG_WARNING, LOG_NOTICE, LOG_INFO, LOG_DEBUG.
+ priority is the syslog priority, one of `LOG_EMERG`,
+ `LOG_ALERT`, `LOG_CRIT`, `LOG_ERR`, `LOG_WARNING`,
+ `LOG_NOTICE`, `LOG_INFO`, `LOG_DEBUG`.
level_prefix is a boolean. If true, kernel-style log priority
level prefixes (such as '<1>') are interpreted. See
"""Journal handler class for the Python logging framework.
Please see the Python logging module documentation for an
- overview: http://docs.python.org/library/logging.html
+ overview: http://docs.python.org/library/logging.html.
To create a custom logger whose messages go only to journal:
>>> log.addHandler(journal.JournalHandler())
>>> log.warn("Some message: %s", detail)
- Note that by default, message levels INFO and DEBUG are ignored
- by the logging framework. To enable those log levels:
+ Note that by default, message levels `INFO` and `DEBUG` are
+ ignored by the logging framework. To enable those log levels:
>>> log.setLevel(logging.DEBUG)
To attach journal MESSAGE_ID, an extra field is supported:
- >>> log.warn("Message with ID",
- >>> extra={'MESSAGE_ID': '22bb01335f724c959ac4799627d1cb61'})
+ >>> import uuid
+ >>> mid = uuid.UUID('0123456789ABCDEF0123456789ABCDEF')
+ >>> log.warn("Message with ID", extra={'MESSAGE_ID': mid})
To redirect all logging messages to journal regardless of where
they come from, attach it to the root logger:
>>> logging.root.addHandler(journal.JournalHandler())
- For more complex configurations when using dictConfig or
- fileConfig, specify 'systemd.journal.JournalHandler' as the
+ For more complex configurations when using `dictConfig` or
+ `fileConfig`, specify `systemd.journal.JournalHandler` as the
handler class. Only standard handler configuration options
- are supported: level, formatter, filters.
+ are supported: `level`, `formatter`, `filters`.
The following journal fields will be sent:
-
- MESSAGE, PRIORITY, THREAD_NAME, CODE_FILE, CODE_LINE,
- CODE_FUNC, LOGGER (name as supplied to getLogger call),
- MESSAGE_ID (optional, see above).
+ `MESSAGE`, `PRIORITY`, `THREAD_NAME`, `CODE_FILE`, `CODE_LINE`,
+ `CODE_FUNC`, `LOGGER` (name as supplied to getLogger call),
+ `MESSAGE_ID` (optional, see above).
"""
def emit(self, record):
~ianmdlvl / elogind.git / blobdiff