从 网络time.windows.com time.apple.com 校正时间

网络时间.py

from socket import *
import datetime,os,struct,time,sys
# Script to set Linux hardware clock (/usr/sbin/hwclock) from an NTP
# time server.   Run as "setclock.py" to simply print the time from
# the NTP server.  Run as "setclock.py --set" to set the Linux
# hardware clock (as the super user, of course).

# Based on Simon Foster's simple SNTP client from ASPN Python cookbook.
# Adapted by Paul Rubin; this script lives at:
#    http://www.nightsong.com/phr/python/setclock.py

# time.apple.com is a stratum 2 time server.  (123 is the SNTP port number).
# More servers info can be found at
#
#   http://www.eecis.udel.edu/~mills/ntp/servers.htm
#
# Note it's considered antisocial to use a stratum 1 server (like NIST)
# for purposes like this which don't need extreme accuracy (i.e. syncing
# your own big NTP network).  See www.ntp.org for more info.
#
# You could also use time.windows.com (Microsoft server) which syncs
# all Windows XP machines everywhere, so it can presumably handle lots
# of clients.

# number of seconds between NTP epoch (1900) and Unix epoch (1970).









time_server = ('time.windows.com', 123)
TIME1970 = 2208988800L
def getdatetime():
    client = socket( AF_INET, SOCK_DGRAM )
    data = '\x1b' + 47 * '\0'
    client.sendto(data.encode(), 0, time_server)
    data, address = client.recvfrom(1024)


    if data:
        t = struct.unpack( '!12I', data )[10]
        if t == 0:
            raise 'invalid response'
        ct = time.ctime(t - TIME1970)
        print 'Current time = %s\n' % ct
        #os.system("/usr/sbin/hwclock --set '--date=%s'"% ct)

        now = datetime.datetime
        now = now.fromtimestamp(t - TIME1970)
        return now
    else:
        raise 'no data returned'
now = getdatetime()
print(now)
time_server = ('time.apple.com', 123)
now = getdatetime()
print(now)
if len(sys.argv) > 1 and sys.argv[1] == "-set":
    os.system('date ' + now.strftime('%Y-%m-%d'))
    os.system('time ' + now.strftime('%H:%M:%S'))