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<title>s6: the s6-tai64nlocal program</title>
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<meta name="Keywords" content="s6 command s6-tai64nlocal filter timestamp TAI64 TAI64N human-readable date time" />
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<a href="index.html">s6</a><br />
<a href="//skarnet.org/software/">Software</a><br />
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<h1> The s6-tai64nlocal program </h1>
<p>
s6-tai64nlocal acts as a filter, reading from stdin and writing to stdout.
For every line that begins with a
<a href="//skarnet.org/software/skalibs/libstddjb/tai.html#timestamp">TAI64N
timestamp</a>, it replaces this timestamp with a human-readable local date and
time.
</p>
<h2> Interface </h2>
<pre>
s6-tai64nlocal [ -g ]
</pre>
<ul>
<li> s6-tai64nlocal exits 0 when it sees the end of stdin. If there's an
unfinished line, s6-tai64nlocal processes it
and writes it before exiting. </li>
</ul>
<h2> Options </h2>
<ul>
<li> <tt>-g</tt> : print GMT time instead of local time. </li>
</ul>
<h2> Notes </h2>
<ul>
<li> The typical use case of s6-tai64nlocal is to read files that have
been filtered through <a href="s6-tai64n.html">s6-tai64n</a>, or log files
that have been produced by <a href="s6-log.html">s6-log</a> with the <tt>-t</tt>
option. For instance, to read the latest httpd logs with human-readable
timestamps, <tt>s6-tai64nlocal < /var/log/httpd/current | less</tt> is a
possible command. </li>
<li> s6-tai64nlocal does neither "line buffering" nor "block buffering". It does
<em>optimal buffering</em>, i.e. it flushes its output buffer every time
it risks blocking on input. </li>
</ul>
<h2> Troubleshooting </h2>
<p>
If s6-tai64nlocal does not appear to give the correct local time:
</p>
<ul>
<li> Check the compilation options that were used for the
<a href="//skarnet.org/software/skalibs/">skalibs</a> libraries
your s6-tai64nlocal program was linked against. In particular, check whether the
<tt>--enable-tai-clock</tt> or <tt>--enable-right-tz</tt> configure options
have been given. </li>
<li> Compare these flags and their meanings with your current timezone. In particular,
check <tt>/etc/localtime</tt>, <tt>/etc/timezone</tt>, <tt>/etc/TZ</tt>, and the TZ
environment variable. </li>
</ul>
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