First of all, please, you should never ask a question about computers
without
stating what your platform is, O/S and version, CPU, and memory size. When
asking a question about NTPD, you should state what version you are using.
Second, people can help more if you tell them what you are trying to do,
what your goal is.
Third, it would help if you would identify yourself, name and organization,
or at least organization type. I, for one, am opposed to giving advice to
terrorists.
All that being said, I used the ntpq program, which is in the ntp/bin
directory,
for something similar to what you want. The documentation for ntpq is in
ntp/doc/HTML/ntpq.html. I was working in Java, so I used the ProcessBuilder
class to start ntpq and pipe its output back to my program. I issued the
host command to ntpq to set the IP address of the queried computer. Then
I repeatedly issued the peers command and parsed the output, which is:
ntpq> peers
remote refid st t when poll reach delay offset
jitter
============================================================================
==
FreeNAS 192.168.1.100 3 u 14 16 7 0.257 -0.353
0.310
+209.51.161.238 .CDMA. 1 u 13 16 7 16.499 1.689
0.480
-time-c.nist.gov .ACTS. 1 u 13 16 5 87.567 34.167
0.714
-time-d.nist.gov .ACTS. 1 u 13 16 5 86.541 34.231
0.596
-bonehed.lcs.mit .CDMA. 1 u 9 16 7 24.862 1.969
1.437
-timelord.w1nr.n 200.98.196.212 2 u 9 16 7 13.593 -0.543
2.816
+ntp1.conectiv.c .IRIG. 1 u 13 16 7 22.165 -0.793
0.598
-lookingglass.ed 74.104.167.114 2 u 7 16 7 16.441 -1.988
0.996
*time.falk.us .GPS. 1 u 8 16 7 24.969 -0.128
0.698
The first column is the tally code. The '*' is the server synced to, '+'
are sync
candidates, and '-' means discarded by the cluster algorithm. Space ' '
means designated no select, in my case.
An easier way, according to the documentation, is to issue the rv 0 command
to ntpq,
where 0 stands for system variables, and rv means readvar or read variables.
A
typical return is:
ntpq> rv 0
associd=0 status=0615 leap_none, sync_ntp, 1 event, clock_sync,
version="ntpd 4.2.8p8@1.3265-o Jun 18 15:51:19.34 (UTC+01:00) 2016 (1)",
processor="x86-SSE2", system="Windows", leap=00, stratum=2,
precision=-22, rootdelay=12.119, rootdisp=2.987, refid=209.51.161.238,
reftime=db8be1e9.5be1a5a3 Tue, Sep 20 2016 12:27:21.358,
clock=db8be1eb.c0fab301 Tue, Sep 20 2016 12:27:23.753, peer=37206, tc=5,
mintc=3, offset=0.132622, frequency=-15.726, sys_jitter=0.382788,
clk_jitter=0.754, clk_wander=0.021, tai=36, leapsec=201507010000,
expire=201612280000
According to the documentation "clock_sync" means the system is synchronized
and "refid" is the peer synced to, but I have never personally used these
for this purpose. The status word is described in decode.html and
might possibly be useful to you.
Charles Elliott
-----Original Message-----
From: questions
[mailto:questions-bounces+elliott.ch=comcast....@lists.ntp.org] On Behalf Of
sneha b
Sent: Tuesday, September 20, 2016 6:49 AM
To: questions@lists.ntp.org
Subject: [ntp:questions] Query NTP status on windows7
Hi,
Is there a way to find out whether the sync was successful or not.
In vxworks we have ipsntp_query_time, is there something similar to this so
that I can use it programmatically and return success/failure.
Thanks
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