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<TITLE>ntptime - read kernel time variables
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<H3>
<TT>ntptime</TT> - read kernel time variables</H3>
<HR>
<H4>
Synopsis</H4>
<TT>ntptime [ -chr ] [ -e <I>est_error</I> ] [ -f <I>frequency</I> ] [
-m <I>max_error</I> ] [ -o <I>offset</I> ] [ -s <I>status</I> ] [ -t <I>time_constant</I>
]</TT>
<H4>
Description</H4>
This program is useful only with special kernels described in the <A HREF="kern.htm">A
Kernel Model for Precision Timekeeping </A>page. It reads and displays
time-related kernel variables using the <TT>ntp_gettime()</TT> system call.
A similar display can be obtained using the <TT>ntpdc</TT> program and
<TT>kerninfo</TT> command.
<H4>
Options</H4>
<DL>
<DT>
<TT>-c</TT></DT>
<DD>
Display the execution time of <TT>ntptime</TT> itself.</DD>
<DT>
<TT>-e <I>est_error</I></TT></DT>
<DD>
Specify estimated error, in microseconds.</DD>
<DT>
<TT>-f <I>frequency</I></TT></DT>
<DD>
Specify frequency offset, in parts per million.</DD>
<DT>
<TT>-h</TT></DT>
<DD>
Display times in Unix timeval format. Default is NTP format.</DD>
<DT>
<TT>-l</TT></DT>
<DD>
Specify the leap bits as a code from 0 to 3.</DD>
<DT>
<TT>-m <I>max_error</I></TT></DT>
<DD>
Display help information.</DD>
<DT>
<TT>-o <I>offset</I></TT></DT>
<DD>
Specify clock offset, in microseconds.</DD>
<DT>
<TT>-r</TT></DT>
<DD>
Display Unix and NTP times in raw format.</DD>
<DT>
<TT>-s <I>status</I></TT></DT>
<DD>
Specify clock status. Better know what you are doing.</DD>
<DT>
<TT>-t <I>time_constant</I></TT></DT>
<DD>
Specify time constant, an integer in the range 0-4.</DD>
</DL>
<HR>
<ADDRESS>
David L. Mills (mills@udel.edu)</ADDRESS>
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