xref: /freebsd/usr.sbin/ntp/doc/ntptime.8 (revision 490d5836b5ab0c76675986696b1637fff97dfae2)
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
20490d5836SPhilippe CharnierThe
21490d5836SPhilippe Charnier.Nm
22490d5836SPhilippe Charnierutility is useful only with special kernels
236d8a85ebSSheldon Hearndescribed in the
246d8a85ebSSheldon Hearn.Qo
256d8a85ebSSheldon HearnA Kernel Model for Precision Timekeeping
266d8a85ebSSheldon Hearn.Qc
276d8a85ebSSheldon Hearnpage
286d8a85ebSSheldon Hearn(available as part of the HTML documentation
296d8a85ebSSheldon Hearnprovided in
306d8a85ebSSheldon Hearn.Pa /usr/share/doc/ntp ) .
316d8a85ebSSheldon HearnIt reads and displays time-related kernel variables
326d8a85ebSSheldon Hearnusing the
33f42dadceSSheldon Hearn.Fn gettime
346d8a85ebSSheldon Hearnand
35f42dadceSSheldon Hearn.Xr adjtime 2
366d8a85ebSSheldon Hearnsystem calls if available.
376d8a85ebSSheldon HearnA similar display can be obtained using the
386d8a85ebSSheldon Hearn.Xr ntpdc 8
396d8a85ebSSheldon Hearnprogram's
406d8a85ebSSheldon Hearn.Ic kerninfo
416d8a85ebSSheldon Hearncommand.
42f42dadceSSheldon Hearn.Pp
436d8a85ebSSheldon HearnThe following options are available:
446d8a85ebSSheldon Hearn.Bl -tag -width indent
456d8a85ebSSheldon Hearn.It Fl c
466d8a85ebSSheldon HearnDisplay the execution time of
476d8a85ebSSheldon Hearn.Nm
486d8a85ebSSheldon Hearnitself.
496d8a85ebSSheldon Hearn.It Fl e Ar est_error
506d8a85ebSSheldon HearnSpecify estimated error, in microseconds.
516d8a85ebSSheldon Hearn.It Fl f Ar frequency
526d8a85ebSSheldon HearnSpecify frequency offset, in parts per million.
536d8a85ebSSheldon Hearn.It Fl h
54f42dadceSSheldon HearnDisplay help information.
556d8a85ebSSheldon Hearn.It Fl l
566d8a85ebSSheldon HearnSpecify the leap bits as a code from 0 to 3.
576d8a85ebSSheldon Hearn.It Fl m Ar max_error
58f42dadceSSheldon HearnSpecify max possible errors, in microseconds.
596d8a85ebSSheldon Hearn.It Fl o Ar offset
606d8a85ebSSheldon HearnSpecify clock offset, in microseconds.
616d8a85ebSSheldon Hearn.It Fl r
626d8a85ebSSheldon HearnDisplay Unix and NTP times in raw format.
636d8a85ebSSheldon Hearn.It Fl s Ar status
646d8a85ebSSheldon Hearn.It Fl t Ar time_constant
656d8a85ebSSheldon HearnSpecify time constant, an integer in the range 0-4.
666d8a85ebSSheldon Hearn.El
676d8a85ebSSheldon Hearn.Sh SEE ALSO
68f42dadceSSheldon Hearn.Xr adjtime 2 ,
696d8a85ebSSheldon Hearn.Xr ntpdc 8
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