16d8a85ebSSheldon Hearn.\" 26d8a85ebSSheldon Hearn.\" $FreeBSD$ 36d8a85ebSSheldon Hearn.\" 4*b09403abSJason Helfman.Dd April 27, 2015 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 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 68