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Editing: calc_tickadj.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ --> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>calc_tickadj User’s Manual</title> <meta name="description" content="calc_tickadj User’s Manual"> <meta name="keywords" content="calc_tickadj User’s Manual"> <meta name="resource-type" content="document"> <meta name="distribution" content="global"> <meta name="Generator" content="makeinfo"> <link href="#Top" rel="start" title="Top"> <link href="dir.html#Top" rel="up" title="(dir)"> <style type="text/css"> <!-- a.summary-letter {text-decoration: none} blockquote.indentedblock {margin-right: 0em} blockquote.smallindentedblock {margin-right: 0em; font-size: smaller} blockquote.smallquotation {font-size: smaller} div.display {margin-left: 3.2em} div.example {margin-left: 3.2em} div.lisp {margin-left: 3.2em} div.smalldisplay {margin-left: 3.2em} div.smallexample {margin-left: 3.2em} div.smalllisp {margin-left: 3.2em} kbd {font-style: oblique} pre.display {font-family: inherit} pre.format {font-family: inherit} pre.menu-comment {font-family: serif} pre.menu-preformatted {font-family: serif} pre.smalldisplay {font-family: inherit; font-size: smaller} pre.smallexample {font-size: smaller} pre.smallformat {font-family: inherit; font-size: smaller} pre.smalllisp {font-size: smaller} span.nolinebreak {white-space: nowrap} span.roman {font-family: initial; font-weight: normal} span.sansserif {font-family: sans-serif; font-weight: normal} ul.no-bullet {list-style: none} --> </style> </head> <body lang="en"> <h1 class="settitle" align="center">calc_tickadj User’s Manual</h1> <a name="Top"></a> <div class="header"> <p> Previous: <a href="dir.html#Top" accesskey="p" rel="prev">(dir)</a>, Up: <a href="dir.html#Top" accesskey="u" rel="up">(dir)</a> </p> </div> <a name="calc_005ftickadj-User_0027s-Manual"></a> <h1 class="top">calc_tickadj User’s Manual</h1> <p>This document describes the use of the NTP Project’s <code>calc_tickadj</code> program. This document applies to version 4.2.8p15 of <code>calc_tickadj</code>. </p> <a name="SEC_Overview"></a> <h2 class="shortcontents-heading">Short Table of Contents</h2> <div class="shortcontents"> <ul class="no-bullet"> <li><a name="stoc-Invoking-calc_005ftickadj" href="#toc-Invoking-calc_005ftickadj">1 Invoking calc_tickadj</a></li> </ul> </div> <table class="menu" border="0" cellspacing="0"> <tr><td align="left" valign="top">• calc_tickadj Description:</td><td> </td><td align="left" valign="top">Description </td></tr> <tr><td align="left" valign="top">• <a href="#calc_005ftickadj-Invocation" accesskey="2">calc_tickadj Invocation</a>:</td><td> </td><td align="left" valign="top">Invoking calc_tickadj </td></tr> </table> <hr> <a name="calc_005ftickadj-Invocation"></a> <div class="header"> <p> Up: <a href="#Top" accesskey="u" rel="up">Top</a> </p> </div> <a name="Invoking-calc_005ftickadj"></a> <h2 class="chapter">1 Invoking calc_tickadj</h2> <a name="index-calc_005ftickadj"></a> <a name="index-Calculates-_0022optimal_0022-value-for-tick-given-ntp-drift-file_002e"></a> <p>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> <p>The example output of </p><div class="example"> <pre class="example">$ ./calc_tickadj 81.699 (drift) 9999 usec; 9999779 nsec $ cat /etc/ntp/drift -23.159 </pre></div> <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> <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> <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> <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. </p> <table class="menu" border="0" cellspacing="0"> <tr><td align="left" valign="top">• <a href="#calc_005ftickadj-usage" accesskey="1">calc_tickadj usage</a>:</td><td> </td><td align="left" valign="top">calc_tickadj help/usage (<samp>--help</samp>) </td></tr> <tr><td align="left" valign="top">• <a href="#calc_005ftickadj-drift_002dfile" accesskey="2">calc_tickadj drift-file</a>:</td><td> </td><td align="left" valign="top">drift-file option (-d) </td></tr> <tr><td align="left" valign="top">• <a href="#calc_005ftickadj-tick" accesskey="3">calc_tickadj tick</a>:</td><td> </td><td align="left" valign="top">tick option (-t) </td></tr> <tr><td align="left" valign="top">• <a href="#calc_005ftickadj-exit-status" accesskey="4">calc_tickadj exit status</a>:</td><td> </td><td align="left" valign="top">exit status </td></tr> </table> <hr> <a name="calc_005ftickadj-usage"></a> <div class="header"> <p> Next: <a href="#calc_005ftickadj-drift_002dfile" accesskey="n" rel="next">calc_tickadj drift-file</a>, Up: <a href="#calc_005ftickadj-Invocation" accesskey="u" rel="up">calc_tickadj Invocation</a> </p> </div> <a name="calc_005ftickadj-help_002fusage-_0028_002d_002dhelp_0029"></a> <h3 class="section">1.1 calc_tickadj help/usage (<samp>--help</samp>)</h3> <a name="index-calc_005ftickadj-help"></a> <p>This is the automatically generated usage text for calc_tickadj. </p> <p>The text printed is the same whether selected with the <code>help</code> option (<samp>--help</samp>) or the <code>more-help</code> option (<samp>--more-help</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>more</samp>. Both will exit with a status code of 0. </p> <div class="example"> <pre class="example">calc_tickadj - Calculates "optimal" value for tick given ntp drift file. - Ver. 4.2.8p13 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> <table class="menu" border="0" cellspacing="0"> <tr><td align="left" valign="top">• <a href="#calc_005ftickadj-drift_002dfile" accesskey="1">calc_tickadj drift-file</a>:</td><td> </td><td align="left" valign="top"> </td></tr> <tr><td align="left" valign="top">• <a href="#calc_005ftickadj-tick" accesskey="2">calc_tickadj tick</a>:</td><td> </td><td align="left" valign="top"> </td></tr> <tr><td align="left" valign="top">• <a href="#calc_005ftickadj-exit-status" accesskey="3">calc_tickadj exit status</a>:</td><td> </td><td align="left" valign="top"> </td></tr> </table> <hr> <a name="calc_005ftickadj-drift_002dfile"></a> <div class="header"> <p> Next: <a href="#calc_005ftickadj-tick" accesskey="n" rel="next">calc_tickadj tick</a>, Previous: <a href="#calc_005ftickadj-usage" accesskey="p" rel="prev">calc_tickadj usage</a>, Up: <a href="#calc_005ftickadj-usage" accesskey="u" rel="up">calc_tickadj usage</a> </p> </div> <a name="drift_002dfile-option-_0028_002dd_0029"></a> <h4 class="subsection">1.1.1 drift-file option (-d)</h4> <a name="index-calc_005ftickadj_002ddrift_002dfile"></a> <p>This is the “ntp drift file to use” option. This option takes a string argument. Use the specified drift file for calculations </p><hr> <a name="calc_005ftickadj-tick"></a> <div class="header"> <p> Next: <a href="#calc_005ftickadj-exit-status" accesskey="n" rel="next">calc_tickadj exit status</a>, Previous: <a href="#calc_005ftickadj-drift_002dfile" accesskey="p" rel="prev">calc_tickadj drift-file</a>, Up: <a href="#calc_005ftickadj-usage" accesskey="u" rel="up">calc_tickadj usage</a> </p> </div> <a name="tick-option-_0028_002dt_0029"></a> <h4 class="subsection">1.1.2 tick option (-t)</h4> <a name="index-calc_005ftickadj_002dtick"></a> <p>This is the “tick value of this host” option. This option takes a number argument. The current tick which to adjustment will be calculated </p><hr> <a name="calc_005ftickadj-exit-status"></a> <div class="header"> <p> Previous: <a href="#calc_005ftickadj-tick" accesskey="p" rel="prev">calc_tickadj tick</a>, Up: <a href="#calc_005ftickadj-usage" accesskey="u" rel="up">calc_tickadj usage</a> </p> </div> <a name="calc_005ftickadj-exit-status-1"></a> <h4 class="subsection">1.1.3 calc_tickadj exit status</h4> <p>One of the following exit values will be returned: </p><dl compact="compact"> <dt>‘<samp>0 (EXIT_SUCCESS)</samp>’</dt> <dd><p>Successful program execution. </p></dd> <dt>‘<samp>1 (EXIT_FAILURE)</samp>’</dt> <dd><p>The operation failed or the command syntax was not valid. </p></dd> </dl> <hr> </body> </html>
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