X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fpython-systemd%2Fjournal.py;h=4f42928f697db025bd2d3d8acba867cf65ccb135;hp=8a688f978b569ad102eb62597b1f1ad814590e8f;hb=c71f26eba57a8263dc28c99f9f446e0a75307f34;hpb=3aa8f0861ca00572879bd32e4f352afd578e674c diff --git a/src/python-systemd/journal.py b/src/python-systemd/journal.py index 8a688f978..4f42928f6 100644 --- a/src/python-systemd/journal.py +++ b/src/python-systemd/journal.py @@ -19,23 +19,29 @@ # You should have received a copy of the GNU Lesser General Public License # along with systemd; If not, see . -import datetime -import functools -import sys -import uuid +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) +_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, + 'MESSAGE_ID': _uuid.UUID, + '_MACHINE_ID': _uuid.UUID, + '_BOOT_ID': _uuid.UUID, 'PRIORITY': int, 'LEADER': int, 'SESSION_ID': int, @@ -67,29 +73,43 @@ DEFAULT_CONVERTERS = { 'COREDUMP_TIMESTAMP': _REALTIME_CONVERTER, } -if sys.version_info >= (3,): - _convert_unicode = functools.partial(str, encoding='utf-8') +if _sys.version_info >= (3,): + _convert_unicode = _functools.partial(str, encoding='utf-8') else: - _convert_unicode = functools.partial(unicode, encoding='utf-8') + _convert_unicode = _functools.partial(unicode, encoding='utf-8') class Journal(_Journal): - def __init__(self, converters=None, *args, **kwargs): - super(Journal, self).__init__(*args, **kwargs) - if sys.version_info >= (3,3): + 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: - # suitable fallback, e.g. 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 KeyError: + except: # Default conversion in unicode try: result = _convert_unicode(value) @@ -99,21 +119,96 @@ class Journal(_Journal): return result def _convert_entry(self, entry): + """ Convert entire journal entry utilising _covert_field""" result = {} - for key, value in entry.iteritems(): + 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 get_next(self, *args, **kwargs): + 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(*args, **kwargs)) + 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 query_unique(self, key, *args, **kwargs): - return set(self._convert_field(key, value) - for value in super(Journal, self).query_unique(key, *args, **kwargs)) def _make_line(field, value): if isinstance(value, bytes):