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 68