Created
March 14, 2024 08:27
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Python script to force timedatectl NTP time sync
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import socket | |
import struct | |
import subprocess | |
import time | |
REF_TIME_1970 = 2208988800 # Reference time | |
def get_ntp_time(addr="0.de.pool.ntp.org") -> int | None: | |
client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) | |
try: | |
client.settimeout(5) | |
data = b"\x1b" + 47 * b"\0" | |
client.sendto(data, (addr, 123)) | |
data, _ = client.recvfrom(1024) | |
if data: | |
t = struct.unpack("!12I", data)[10] | |
t -= REF_TIME_1970 | |
return t | |
finally: | |
client.close() | |
return None | |
if __name__ == "__main__": | |
subprocess.run(["timedatectl", "set-ntp", "false"], capture_output=True) | |
t = get_ntp_time() | |
if t: | |
time.clock_settime(time.CLOCK_REALTIME, float(t)) | |
subprocess.run(["hwclock", "--systohc"], capture_output=True) | |
subprocess.run(["timedatectl", "set-ntp", "true"], capture_output=True) |
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