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Linux - How Do I Determine NTP Stratum Level

Posted on 2009-04-22
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Last Modified: 2013-12-15


I'm running CentOs 5.2, in a local closed network with several other NTP
servers running (each with a different stratum level).
My main processor is set up as a local time server (127.127.1.0),
and ntpd seems to be running OK. In my C application, I need to know
the stratum level of the time server currently in use - this is because
this legacy application relies on the unique statum level to determine
the server's ID.

So - is there an easy way to determine the stratum level at runtime - or
should I adopt another method to determine the server ID?

Thanks
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Question by:dbCnc
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Expert Comment

by:WizRd-Linux
ID: 24210179
ntpq -p

The third column is the stratum level of the servers you are connecting to.
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Author Comment

by:dbCnc
ID: 24214610

WizRd-Linux,

Yes I've been able to determine the stratum level interactively from the command line using ntpq-p as you mentioned.
What I'm trying to do is to determine the stratum from within my C application at runtime.
Is there an easy way to do this, or do I have to code up an NTP client to receive the data from the server?

Thanks
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LVL 13

Accepted Solution

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WizRd-Linux earned 2000 total points
ID: 24220096
You are able to do this, but all you will be doing is re-writing ntpq.  If you have a desire to do this you will need to download the source of ntpd and review the source code for ntpq, specifically when the -p flag is called.  This will give you the code to extract the stratum and use in your application.

Unfortunately there isn't a method to achieve the results you are after.
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Author Closing Comment

by:dbCnc
ID: 31573288
Thanks...
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