/usr/lib/python2.7/dist-packages/framework/subsystems/otimed/otimed.py is in fso-frameworkd 0.10.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# -*- coding: UTF-8 -*-
"""
The Time Daemon - Python Implementation
(C) 2008 Guillaume 'Charlie' Chereau
(C) 2008 Jan 'Shoragan' Lübbe <jluebbe@lasnet.de>
(C) 2008 Openmoko, Inc.
GPLv2 or later
Package: otimed
Module: otimed
"""
__version__ = "0.2.2.1"
MODULE_NAME = "otimed"
import clock
from framework.config import config
from framework.patterns import dbuscache
from datetime import datetime, timedelta
from math import sqrt
import os
import shutil
import socket
import struct
import time
# All the dbus modules
import dbus
import dbus.service
import dbus.mainloop.glib
import gobject
import logging
logger = logging.getLogger( MODULE_NAME )
def getOutput(cmd):
from subprocess import Popen, PIPE
return Popen(cmd, shell=True, stdout=PIPE).communicate()[0]
def toSeconds( delta ):
return delta.days*24*60*60+delta.seconds+delta.microseconds*0.000001
def drop_dbus_result( *args ):
if args:
logger.warning( "unhandled dbus result: %s", args )
def log_dbus_error( desc ):
def dbus_error( e, desc = desc ):
logger.error( "%s (%s %s: %s)" % ( desc, e.__class__.__name__, e.get_dbus_name(), e.get_dbus_message() ) )
return dbus_error
#============================================================================#
class TimeSource( object ):
#============================================================================#
def __init__( self, bus ):
self.offset = None
self.bus = bus
#============================================================================#
class GPSTimeSource( TimeSource ):
#============================================================================#
def __init__( self, bus ):
TimeSource.__init__( self, bus )
self.invalidTimeout = None
self.bus.add_signal_receiver(
self._handleTimeChanged,
"TimeChanged",
"org.freedesktop.Gypsy.Time",
None,
None
)
def _handleTimeChanged( self, t ):
if t:
self.offset = datetime.utcfromtimestamp( t ) - datetime.utcnow()
logger.debug( "GPS: offset=%f", toSeconds( self.offset ) )
else:
self.offset = None
logger.debug( "GPS: time invalid" )
if not self.invalidTimeout is None:
gobject.source_remove( self.invalidTimeout )
self.invalidTimeout = gobject.timeout_add_seconds( 300, self._handleInvalidTimeout )
def _handleInvalidTimeout( self ):
self.offset = None
self.invalidTimeout = None
logger.debug( "GPS: timeout" )
return False
def __repr__( self ):
return "<%s>" % ( self.__class__.__name__, )
#============================================================================#
class NTPTimeSource( TimeSource ):
#============================================================================#
def __init__( self, bus, server, interval = 600 ):
TimeSource.__init__( self, bus )
self.server = server
self.interval = interval
self.socket = socket.socket( socket.AF_INET, socket.SOCK_DGRAM )
self.socket.bind( ('', 123) )
self.socket.setblocking( False )
self.updateTimeout = gobject.timeout_add_seconds( self.interval, self._handleUpdateTimeout )
self.dataWatch = gobject.io_add_watch( self.socket.makefile(), gobject.IO_IN, self._handleData )
self._handleUpdateTimeout()
def _handleUpdateTimeout( self ):
logger.debug( "NTP: requesting timestamp" )
self.offset = None
# FIXME do everything async
data = '\x1b' + 47 * '\0'
try:
self.socket.sendto( data, ( self.server, 123 ))
except:
logger.debug( "NTP: failed to request timestamp" )
# reenable timeout
return True
def _handleData( self, source, condition ):
epoch = 2208988800L
data, address = self.socket.recvfrom( 1024 )
if data:
s, f = struct.unpack( '!12I', data )[10:12]
s -= epoch
t = s + f/(2.0**32)
self.offset = datetime.utcfromtimestamp( t ) - datetime.utcnow()
logger.debug( "NTP: offset=%f", toSeconds( self.offset ) )
else:
self.offset = None
logger.warning( "NTP: no timestamp received" )
def __repr__( self ):
return "<%s checking %s every %s seconds>" % ( self.__class__.__name__, self.server, self.interval )
#============================================================================#
class GSMZoneSource( object ):
#============================================================================#
TIMEOUT = 24*60*60
def __init__( self, bus ):
self.zonetab = []
self.zone = None
self.mccmnc = None
self.mccmnc_ts = 0.0
self.isocode = None
self.offset = None
self.offset_ts = 0.0
self.bus = bus
self.bus.add_signal_receiver(
self._handleNetworkStatusChanged,
"Status",
"org.freesmartphone.GSM.Network",
None,
None
)
self.bus.add_signal_receiver(
self._handleTimeZoneReport,
"TimeZoneReport",
"org.freesmartphone.GSM.Network",
None,
None
)
self.gsmdata = dbuscache.dbusInterfaceForObjectWithInterface(
"org.freesmartphone.ogsmd",
"/org/freesmartphone/GSM/Server",
"org.freesmartphone.GSM.Data" )
def _handleTimeZoneReport( self, report ):
# CTZV is offset * 4
offset = report / 4.0
self.offset_ts = time.time()
if self.offset == offset:
return
self.offset = offset
logger.debug( "GSM: Offset=%i", offset )
self.update()
def _handleNetworkStatusChanged( self, status ):
self.mccmnc = None
self.mccmnc_ts = 0.0
self.isocode = None
if not "code" in status:
logger.debug( "GSM: no network code" )
return
code = status["code"]
self.mccmnc_ts = time.time()
if self.mccmnc == code:
return
self.mccmnc = code
mcc = code[:3]
mnc = code[3:]
logger.debug( "GSM: MCC=%s MNC=%s", mcc, mnc )
self.gsmdata.GetNetworkInfo(
mcc, mnc,
reply_handler=self._handleNetworkInfoReply,
error_handler=log_dbus_error( "error while calling org.freesmartphone.GSM.Data.GetNetworkInfo" )
)
def _handleNetworkInfoReply( self, info ):
self.isocode = None
if not "iso" in info:
logger.debug( "GSM: no ISO-Code for this network" )
return
if self.isocode == info["iso"]:
return
self.isocode = info["iso"]
logger.debug( "GSM: ISO-Code %s", info["iso"] )
self.update()
def update( self ):
if not self.zonetab:
logger.debug( "GSM: loading zone.tab" )
for line in open( "/usr/share/zoneinfo/zone.tab", "r" ):
if line:
self.zonetab.append( line.rstrip().split( "\t" ) )
self.zone = None
now = time.time()
if now - self.mccmnc_ts > self.TIMEOUT:
self.mccmnc = None
self.isocode = None
if now - self.offset_ts > self.TIMEOUT:
self.offset = None
logger.debug( "GSM: determining time zone (isocode=%s offset=%s)", self.isocode, self.offset )
zones = []
if not self.isocode is None:
for zone in self.zonetab:
if zone[0] == self.isocode:
logger.debug( "GSM: found zone %s", zone )
zones.append( zone[2] )
if not self.offset is None:
if not len( zones ) == 1:
if round(self.offset) == 0.0:
zone = "Etc/GMT"
else:
# CTZV needs to be inverted to get the TZ used in zoneinfo
# and we don't have fractional offsets :/
zone = "Etc/GMT%+i" % round(self.offset*-1)
zones = [ zone ]
if not zones:
logger.info( "GSM: no zone found" )
return
if len(zones) > 1:
logger.info( "GSM: multiple zones found" )
return
if self.zone == zones[0]:
return
self.zone = zones[0]
logger.info( "GSM: timezone '%s'", self.zone )
try:
try:
os.remove( "/etc/localtime" )
except:
pass
shutil.copyfile( "/usr/share/zoneinfo/"+self.zone, "/etc/localtime" )
except:
logger.warning( "failed to install time zone file to /etc/localtime" )
return True
def __repr__( self ):
return "<%s>" % ( self.__class__.__name__, )
#============================================================================#
class Time( dbus.service.Object ):
#============================================================================#
def __init__( self, bus ):
self.path = "/org/freesmartphone/Time"
super( Time, self ).__init__( bus, self.path )
self.interface = "org.freesmartphone.Time"
self.bus = bus
timesources = [x.strip().upper() for x in config.getValue( "otimed", "timesources", "GPS,NTP").split( ',' )]
zonesources = [x.strip().upper() for x in config.getValue( "otimed", "zonesources", "GSM").split( ',' )]
ntpserver = config.getValue( "otimed", "ntpserver", "134.169.172.1").strip()
self.timesources = []
if 'GPS' in timesources:
self.timesources.append( GPSTimeSource( self.bus ) )
if 'NTP' in timesources:
self.timesources.append( NTPTimeSource( self.bus, ntpserver ) )
logger.info( "loaded timesources %s", self.timesources )
self.zonesources = []
if 'GSM' in zonesources:
self.zonesources.append( GSMZoneSource( self.bus ) )
logger.info( "loaded zonesources %s", self.zonesources )
self.interval = 90
self.updateTimeout = gobject.timeout_add_seconds( self.interval, self._handleUpdateTimeout )
def _handleUpdateTimeout( self ):
logger.debug( "checking time sources" )
offsets = []
for source in self.timesources:
if not source.offset is None:
offsets.append( toSeconds( source.offset ) )
if not offsets:
logger.debug( "no working time source" )
return True
n = len( offsets )
mean = sum( offsets ) / n
sd = sqrt( sum( (x-mean)**2 for x in offsets ) / n )
logger.info( "offsets: n=%i mean=%f sd=%f", n, mean, sd )
if sd < 15.0 < abs( mean ):
logger.info( "adjusting clock by %f seconds" % mean )
d = timedelta( seconds=mean )
for source in self.timesources:
if not source.offset is None:
source.offset = source.offset - d
clock.adjust( mean )
getOutput( "hwclock --systohc --utc" )
# reenable timeout
return True
#============================================================================#
def factory( prefix, controller ):
#============================================================================#
"""This is the magic function that will be called by the framework module manager"""
time_service = Time( controller.bus )
return [time_service]
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