import sys

import datetime

 

time_tuple = ( 2012, # Year

                  9, # Month

                  6, # Day

                  0, # Hour

                 38, # Minute

                  0, # Second

                  0, # Millisecond

              )

 

def _win_set_time(time_tuple):

    import pywin32

    # http://timgolden.me.uk/pywin32-docs/win32api__SetSystemTime_meth.html

    # pywin32.SetSystemTime(year, month , dayOfWeek , day , hour , minute , second , millseconds )

    dayOfWeek = datetime.datetime(time_tuple).isocalendar()[2]

    pywin32.SetSystemTime( time_tuple[:2] + (dayOfWeek,) + time_tuple[2:])

 

 

def _linux_set_time(time_tuple):

    import ctypes

    import ctypes.util

    import time

 

    # /usr/include/linux/time.h:

    #

    # define CLOCK_REALTIME                     0

    CLOCK_REALTIME = 0

 

    # /usr/include/time.h

    #

    # struct timespec

    #  {

    #    __time_t tv_sec;            /* Seconds.  */

    #    long int tv_nsec;           /* Nanoseconds.  */

    #  };

    class timespec(ctypes.Structure):

        _fields_ = [("tv_sec", ctypes.c_long),

                    ("tv_nsec", ctypes.c_long)]

 

    librt = ctypes.CDLL(ctypes.util.find_library("rt"))

 

    ts = timespec()

    ts.tv_sec = int( time.mktime( datetime.datetime( *time_tuple[:6]).timetuple() ) )

    ts.tv_nsec = time_tuple[6] * 1000000 # Millisecond to nanosecond

 

    # http://linux.die.net/man/3/clock_settime

    librt.clock_settime(CLOCK_REALTIME, ctypes.byref(ts))

 

 

if sys.platform=='linux2':

    _linux_set_time(time_tuple)

 

elif  sys.platform=='win32':

    _win_set_time(time_tuple)