<html lang="en"> <head> <title>calc_tickadj User's Manual</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="calc_tickadj User's Manual"> <meta name="generator" content="makeinfo 4.13"> <link title="Top" rel="top" href="#Top"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family:serif; font-weight:normal; } span.sansserif { font-family:sans-serif; font-weight:normal; } --></style> </head> <body> <h1 class="settitle">calc_tickadj User's Manual</h1> <div class="node"> <a name="Top"></a> <p><hr> Next: <a rel="next" accesskey="n" href="#calc_005ftickadj-Description">calc_tickadj Description</a>, Previous: <a rel="previous" accesskey="p" href="#dir">(dir)</a>, Up: <a rel="up" accesskey="u" href="#dir">(dir)</a> </div> <h2 class="unnumbered">calc_tickadj User's Manual</h2> <p>This document describes the use of the NTP Project's <code>calc_tickadj</code> program. This document applies to version 4.2.8p8 of <code>calc_tickadj</code>. <div class="shortcontents"> <h2>Short Contents</h2> <ul> <a href="#Top">calc_tickadj User's Manual</a> </ul> </div> <ul class="menu"> <li><a accesskey="1" href="#calc_005ftickadj-Description">calc_tickadj Description</a>: Description <li><a accesskey="2" href="#calc_005ftickadj-Invocation">calc_tickadj Invocation</a>: Invoking calc_tickadj </ul> <div class="node"> <a name="calc_tickadj-Invocation"></a> <a name="calc_005ftickadj-Invocation"></a> <p><hr> Previous: <a rel="previous" accesskey="p" href="#calc_005ftickadj-Description">calc_tickadj Description</a>, Up: <a rel="up" accesskey="u" href="#Top">Top</a> </div> <h3 class="section">Invoking calc_tickadj</h3> <p><a name="index-calc_005ftickadj-1"></a><a name="index-Calculates-_0022optimal_0022-value-for-tick-given-ntp-drift-file_002e-2"></a> The <code>calc_tickadj</code> script uses provided ntp drift file to generate optimal tick value. Generally, ntpd can do better job if the drift value is the smallest possible number. <p>The example output of <pre class="example"> $ ./calc_tickadj 81.699 (drift) 9999 usec; 9999779 nsec $ cat /etc/ntp/drift -23.159 </pre> <p>means the following. If tick on that box is 10,000, by making the value 9999 we'll shift the box from its current drift of -23.159 to a drift of 81.699, and in doing so we'll speed the clock up a little every second instead of slowing the clock down a little. <p>If 'tick' on that box is 10,000,000 then by setting it to 9999779 the drift value will be somewhere around 0.0. <p><code>calc_tickadj</code> tries to determine the the tick value by using <code>tickadj</code> program from ntp package. If this doesn't work you can specify current tick manually on command line. <p>This section was generated by <strong>AutoGen</strong>, using the <code>agtexi-cmd</code> template and the option descriptions for the <code>calc_tickadj</code> program. <ul class="menu"> <li><a accesskey="1" href="#calc_005ftickadj-usage">calc_tickadj usage</a>: calc_tickadj help/usage (<samp><span class="option">--help</span></samp>) <li><a accesskey="2" href="#calc_005ftickadj-drift_002dfile">calc_tickadj drift-file</a>: drift-file option (-d) <li><a accesskey="3" href="#calc_005ftickadj-tick">calc_tickadj tick</a>: tick option (-t) <li><a accesskey="4" href="#calc_005ftickadj-exit-status">calc_tickadj exit status</a>: exit status </ul> <div class="node"> <a name="calc_tickadj-usage"></a> <a name="calc_005ftickadj-usage"></a> <p><hr> Next: <a rel="next" accesskey="n" href="#calc_005ftickadj-drift_002dfile">calc_tickadj drift-file</a>, Up: <a rel="up" accesskey="u" href="#calc_005ftickadj-Invocation">calc_tickadj Invocation</a> </div> <h4 class="subsection">calc_tickadj help/usage (<samp><span class="option">--help</span></samp>)</h4> <p><a name="index-calc_005ftickadj-help-3"></a> This is the automatically generated usage text for calc_tickadj. <p>The text printed is the same whether selected with the <code>help</code> option (<samp><span class="option">--help</span></samp>) or the <code>more-help</code> option (<samp><span class="option">--more-help</span></samp>). <code>more-help</code> will print the usage text by passing it through a pager program. <code>more-help</code> is disabled on platforms without a working <code>fork(2)</code> function. The <code>PAGER</code> environment variable is used to select the program, defaulting to <samp><span class="file">more</span></samp>. Both will exit with a status code of 0. <pre class="example">calc_tickadj - Calculates "optimal" value for tick given ntp drift file. - Ver. 4.2.7p467 USAGE: calc_tickadj [ -<flag> [<val>] | --<name>[{=| }<val>] ]... -d, --drift-file=str Ntp drift file to use -t, --tick=num Tick value of this host -?, --help Display usage information and exit --more-help Pass the extended usage text through a pager Options are specified by doubled hyphens and their name or by a single hyphen and the flag character. </pre> <div class="node"> <a name="calc_tickadj-drift-file"></a> <a name="calc_005ftickadj-drift_002dfile"></a> <p><hr> Next: <a rel="next" accesskey="n" href="#calc_005ftickadj-tick">calc_tickadj tick</a>, Previous: <a rel="previous" accesskey="p" href="#calc_005ftickadj-usage">calc_tickadj usage</a>, Up: <a rel="up" accesskey="u" href="#calc_005ftickadj-Invocation">calc_tickadj Invocation</a> </div> <h4 class="subsection">drift-file option (-d)</h4> <p><a name="index-calc_005ftickadj_002ddrift_002dfile-4"></a> This is the “ntp drift file to use” option. This option takes a string argument. Use the specified drift file for calculations <div class="node"> <a name="calc_tickadj-tick"></a> <a name="calc_005ftickadj-tick"></a> <p><hr> Next: <a rel="next" accesskey="n" href="#calc_005ftickadj-exit-status">calc_tickadj exit status</a>, Previous: <a rel="previous" accesskey="p" href="#calc_005ftickadj-drift_002dfile">calc_tickadj drift-file</a>, Up: <a rel="up" accesskey="u" href="#calc_005ftickadj-Invocation">calc_tickadj Invocation</a> </div> <h4 class="subsection">tick option (-t)</h4> <p><a name="index-calc_005ftickadj_002dtick-5"></a> This is the “tick value of this host” option. This option takes a number argument. The current tick which to adjustment will be calculated <div class="node"> <a name="calc_tickadj-exit-status"></a> <a name="calc_005ftickadj-exit-status"></a> <p><hr> Previous: <a rel="previous" accesskey="p" href="#calc_005ftickadj-tick">calc_tickadj tick</a>, Up: <a rel="up" accesskey="u" href="#calc_005ftickadj-Invocation">calc_tickadj Invocation</a> </div> <h4 class="subsection">calc_tickadj exit status</h4> <p>One of the following exit values will be returned: <dl> <dt>‘<samp><span class="samp">0 (EXIT_SUCCESS)</span></samp>’<dd>Successful program execution. <br><dt>‘<samp><span class="samp">1 (EXIT_FAILURE)</span></samp>’<dd>The operation failed or the command syntax was not valid. </dl> </body></html>