NAME

       ntptime - read and set kernel time variables

SYNOPSIS

       ntptime [-chr] [-e est_error] [-f frequency] [-j]
               [-m max_error] [-o offset] [-s status]
               [-t time_constant]

DESCRIPTION

       Checks the kernel configuration for the NTP user interface syscalls ntp_gettime() and
       ntp_adjtime(). If present, the current timekeeping data are displayed. If not, a
       disappointment is displayed. See the kernel page file in the HTML documentation in
       distribution for further details.

       A similar display can be obtained using the ntpq program and kerninfo command.

       This program is useful only with kernels featuring the ntp_adjtime(2) system call or local
       equivalent, as described in the A Kernel Model for Precision Timekeeping page,

OPTIONS

       -c
           Display the execution time of ntptime itself.

       -e est_error
           Specify estimated error, in microseconds.

       -f frequency
           Specify frequency offset, in parts per million.

       -h
           Display help information.

       -j
           Report in JSON rather than plain text.

       -m max_error
           Specify max possible errors, in microseconds.

       -o offset
           Specify clock offset, in microseconds.

       -r
           Display Unix and NTP times in raw format.

       -s status
           Specify clock status. Better know what you are doing.

       -t time_constant
           Specify time constant, an integer in the range 0-10.

BUGS

       The format for modes and status in the JSON report is less than ideal.

EXIT STATUS

       One of the following exit values will be returned:

       0 (EXIT_SUCCESS)
           Successful program execution.

       1 (EXIT_FAILURE)
           The operation failed or the command invocation was not valid.