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e6bfd18d21
Fixes two small bugs including one regression. MFC after: 3 days Merge commit 'ab1f1aa8333369a83ff284848fc3fc2e52d5f29f'
103 lines
3.5 KiB
Plaintext
103 lines
3.5 KiB
Plaintext
@node calc_tickadj Invocation
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@section Invoking calc_tickadj
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@pindex calc_tickadj
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@cindex Calculates "optimal" value for tick given ntp drift file.
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@ignore
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#
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# EDIT THIS FILE WITH CAUTION (invoke-calc_tickadj.texi)
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#
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# It has been AutoGen-ed June 6, 2023 at 04:39:13 AM by AutoGen 5.18.16
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# From the definitions calc_tickadj-opts.def
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# and the template file agtexi-cmd.tpl
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@end ignore
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The @code{calc_tickadj} script uses provided ntp drift file to generate optimal
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tick value. Generally, ntpd can do better job if the drift value is the
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smallest possible number.
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The example output of
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@example
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$ ./calc_tickadj
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81.699 (drift)
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9999 usec; 9999779 nsec
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$ cat /etc/ntp/drift
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-23.159
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@end example
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means the following. If tick on that box is 10,000, by making the value 9999
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we'll shift the box from its current drift of -23.159 to a drift of 81.699, and
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in doing so we'll speed the clock up a little every second instead of slowing
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the clock down a little.
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If 'tick' on that box is 10,000,000 then by setting it to 9999779 the drift
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value will be somewhere around 0.0.
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@code{calc_tickadj} tries to determine the the tick value by using
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@code{tickadj} program from ntp package. If this doesn't work you can specify
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current tick manually on command line.
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This section was generated by @strong{AutoGen},
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using the @code{agtexi-cmd} template and the option descriptions for the @code{calc_tickadj} program.
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@menu
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* calc_tickadj usage:: calc_tickadj help/usage (@option{--help})
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* calc_tickadj drift-file:: drift-file option (-d)
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* calc_tickadj tick:: tick option (-t)
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* calc_tickadj exit status:: exit status
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@end menu
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@node calc_tickadj usage
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@subsection calc_tickadj help/usage (@option{--help})
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@cindex calc_tickadj help
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This is the automatically generated usage text for calc_tickadj.
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The text printed is the same whether selected with the @code{help} option
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(@option{--help}) or the @code{more-help} option (@option{--more-help}). @code{more-help} will print
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the usage text by passing it through a pager program.
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@code{more-help} is disabled on platforms without a working
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@code{fork(2)} function. The @code{PAGER} environment variable is
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used to select the program, defaulting to @file{more}. Both will exit
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with a status code of 0.
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@exampleindent 0
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@example
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calc_tickadj - Calculates "optimal" value for tick given ntp drift file. - Ver. 4.2.8p15
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USAGE: calc_tickadj [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]...
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-d, --drift-file=str Ntp drift file to use
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-t, --tick=num Tick value of this host
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-?, --help Display usage information and exit
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--more-help Pass the extended usage text through a pager
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Options are specified by doubled hyphens and their name or by a single
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hyphen and the flag character.
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@end example
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@exampleindent 4
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@node calc_tickadj drift-file
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@subsection drift-file option (-d)
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@cindex calc_tickadj-drift-file
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This is the ``ntp drift file to use'' option.
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This option takes a string argument.
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Use the specified drift file for calculations
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@node calc_tickadj tick
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@subsection tick option (-t)
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@cindex calc_tickadj-tick
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This is the ``tick value of this host'' option.
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This option takes a number argument.
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The current tick which to adjustment will be calculated
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@node calc_tickadj exit status
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@subsection calc_tickadj exit status
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One of the following exit values will be returned:
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@table @samp
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@item 0 (EXIT_SUCCESS)
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Successful program execution.
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@item 1 (EXIT_FAILURE)
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The operation failed or the command syntax was not valid.
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@end table
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