xref: /freebsd/usr.sbin/ntp/doc/ntptime.8 (revision f42dadce1ef84a955f9788c49c96a2045a6c50e4)
16d8a85ebSSheldon Hearn.\"
26d8a85ebSSheldon Hearn.\" $FreeBSD$
36d8a85ebSSheldon Hearn.\"
46d8a85ebSSheldon Hearn.Dd January 7, 2000
56d8a85ebSSheldon Hearn.Dt NTPTIME 8
66d8a85ebSSheldon Hearn.Os
76d8a85ebSSheldon Hearn.Sh NAME
86d8a85ebSSheldon Hearn.Nm ntptime
96d8a85ebSSheldon Hearn.Nd read kernel time variables
106d8a85ebSSheldon Hearn.Sh SYNOPSIS
11e97407b4SRuslan Ermilov.Nm
126d8a85ebSSheldon Hearn.Op Fl chr
136d8a85ebSSheldon Hearn.Op Fl e Ar est_error
146d8a85ebSSheldon Hearn.Op Fl f Ar frequency
156d8a85ebSSheldon Hearn.Op Fl m Ar max_error
166d8a85ebSSheldon Hearn.Op Fl o Ar offset
176d8a85ebSSheldon Hearn.Op Fl s Ar status
186d8a85ebSSheldon Hearn.Op Fl t Ar time_constant
196d8a85ebSSheldon Hearn.Sh DESCRIPTION
206d8a85ebSSheldon HearnThis program is useful only with special kernels
216d8a85ebSSheldon Hearndescribed in the
226d8a85ebSSheldon Hearn.Qo
236d8a85ebSSheldon HearnA Kernel Model for Precision Timekeeping
246d8a85ebSSheldon Hearn.Qc
256d8a85ebSSheldon Hearnpage
266d8a85ebSSheldon Hearn(available as part of the HTML documentation
276d8a85ebSSheldon Hearnprovided in
286d8a85ebSSheldon Hearn.Pa /usr/share/doc/ntp ) .
296d8a85ebSSheldon HearnIt reads and displays time-related kernel variables
306d8a85ebSSheldon Hearnusing the
31f42dadceSSheldon Hearn.Fn gettime
326d8a85ebSSheldon Hearnand
33f42dadceSSheldon Hearn.Xr adjtime 2
346d8a85ebSSheldon Hearnsystem calls if available.
356d8a85ebSSheldon HearnA similar display can be obtained using the
366d8a85ebSSheldon Hearn.Xr ntpdc 8
376d8a85ebSSheldon Hearnprogram's
386d8a85ebSSheldon Hearn.Ic kerninfo
396d8a85ebSSheldon Hearncommand.
40f42dadceSSheldon Hearn.Pp
416d8a85ebSSheldon HearnThe following options are available:
426d8a85ebSSheldon Hearn.Bl -tag -width indent
436d8a85ebSSheldon Hearn.It Fl c
446d8a85ebSSheldon HearnDisplay the execution time of
456d8a85ebSSheldon Hearn.Nm
466d8a85ebSSheldon Hearnitself.
476d8a85ebSSheldon Hearn.It Fl e Ar est_error
486d8a85ebSSheldon HearnSpecify estimated error, in microseconds.
496d8a85ebSSheldon Hearn.It Fl f Ar frequency
506d8a85ebSSheldon HearnSpecify frequency offset, in parts per million.
516d8a85ebSSheldon Hearn.It Fl h
52f42dadceSSheldon HearnDisplay help information.
536d8a85ebSSheldon Hearn.It Fl l
546d8a85ebSSheldon HearnSpecify the leap bits as a code from 0 to 3.
556d8a85ebSSheldon Hearn.It Fl m Ar max_error
56f42dadceSSheldon HearnSpecify max possible errors, in microseconds.
576d8a85ebSSheldon Hearn.It Fl o Ar offset
586d8a85ebSSheldon HearnSpecify clock offset, in microseconds.
596d8a85ebSSheldon Hearn.It Fl r
606d8a85ebSSheldon HearnDisplay Unix and NTP times in raw format.
616d8a85ebSSheldon Hearn.It Fl s Ar status
626d8a85ebSSheldon Hearn.It Fl t Ar time_constant
636d8a85ebSSheldon HearnSpecify time constant, an integer in the range 0-4.
646d8a85ebSSheldon Hearn.El
656d8a85ebSSheldon Hearn.Sh SEE ALSO
66f42dadceSSheldon Hearn.Xr adjtime 2 ,
676d8a85ebSSheldon Hearn.Xr ntpdc 8
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