static/freebsd/man4/null.4 4.html


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<table class="head">
  <tr>
    <td class="head-ltitle">NULL(4)</td>
    <td class="head-vol">Device Drivers Manual</td>
    <td class="head-rtitle">NULL(4)</td>
  </tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">null</code> &#x2014; <span class="Nd">the null
    device</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">The <code class="Nm">null</code> device accepts and reads data as
    any ordinary (and willing) file - but throws it away. The length of the
    <code class="Nm">null</code> device is always zero.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h1>
<dl class="Bl-tag">
  <dt><span class="Pa">/dev/null</span></dt>
  <dd style="width: auto;">&#x00A0;</dd>
</dl>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
  ALSO</a></h1>
<p class="Pp"><a class="Xr">full(4)</a>, <a class="Xr">zero(4)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<p class="Pp">A <code class="Nm">null</code> device appeared in
    <span class="Ux">Version&#x00A0;4 AT&amp;T UNIX</span>.</p>
</section>
</div>
<table class="foot">
  <tr>
    <td class="foot-date">August 30, 2019</td>
    <td class="foot-os">FreeBSD 15.0</td>
  </tr>
</table>