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<title>s6-portable-utils: the s6-head program</title>
<meta name="Description" content="s6-portable-utils: the s6-head program" />
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<p>
<a href="index.html">s6-portable-utils</a><br />
<a href="http://skarnet.org/software/">Software</a><br />
<a href="http://skarnet.org/">skarnet.org</a>
</p>
<h1> The <tt>s6-head</tt> program </h1>
<p>
s6-head prints the first lines of its input files.
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<h2> Interface </h2>
<pre>
s6-head [ -S ] [ -1..9 | -n <em>lines</em> | -c <em>chars</em> ] <em>file...</em>
</pre>
<p>
s6-head acts as the generic
<a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/head.html">head</a> utility.
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<h2> Extra options </h2>
<ul>
<li> <tt>-S</tt> : safe mode. s6-head stops reading its input files <em>right after</em>
getting all the lines it needs. The rest of the stream can then be handled by other
utilities without any data loss. </li>
<li> <tt>-1..9</tt> : equivalent to <tt>-n 1</tt> .. <tt>-n 9</tt>. </li>
<li> <tt>-c</tt> <em>chars</em> : cuts after <em>chars</em> characters instead
of <em>lines</em> lines. </li>
</ul>
<h2> Posixness </h2>
<p>
s6-head <strong>is</strong> suitable as a Single Unix
<a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/head.html">head</a>
program.
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