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<title>s6: the s6-fdholder-delete program</title>
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<p>
<a href="index.html">s6</a><br />
<a href="//skarnet.org/software/">Software</a><br />
<a href="//skarnet.org/">skarnet.org</a>
</p>
<h1> The <tt>s6-fdholder-delete</tt> program </h1>
<p>
<tt>s6-fdholder-delete</tt> connects to a
<a href="s6-fdholderd.html">fd-holding daemon</a> listening on a
Unix domain socket, and deletes a file descriptor from the
daemon storage.
</p>
<h2> Interface </h2>
<pre>
s6-fdholder-delete [ -t <em>timeout</em> ] <em>path</em> <em>id</em>
</pre>
<ul>
<li> <tt>s6-fdholder-delete</tt> connects to a
<a href="s6-fdholderd.html">s6-fdholderd</a> server process listening on
<em>path</em>. </li>
<li> It tells the server to close the file descriptor that has been
stored with identifier <em>id</em>. </li>
</ul>
<h2> Options </h2>
<ul>
<li> <tt>-t <em>timeout</em></tt> : if the operation cannot be
processed in <em>timeout</em> milliseconds, then fail with an error message.
Communications with the server should be near-instant, so this option is
only here to protect users against programming errors (connecting to the
wrong socket, for instance). </li>
</ul>
<h2> Exit codes </h2>
<ul>
<li> 0: success. </li>
<li> 1: the server denied the operation. The meaning of the error messages
is explained <a href="s6-fdholder-errorcodes.html">here</a>. </li>
<li> 100: wrong usage. </li>
<li> 111: system call failed - that includes attempting to connect to a
nonexistent socket, or one where no <a href="s6-fdholderd.html">s6-fdholderd</a>
daemon is listening. </li>
</ul>
<h2> Usage example </h2>
<pre>
s6-fdholder-delete /service/fdholderd/s MYSOCKET
</pre>
<p>
will tell a s6-fdholderd daemon listening on the
<tt>/service/fdholderd/s</tt> socket to close the file descriptor
dentified as MYSOCKET.
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