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<a name="fcloseall_002d_002d_002dclose-all-files"></a>
<h3 class="section">4.5 <code>fcloseall</code>&mdash;close all files</h3>
<a name="index-fcloseall"></a>
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<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;stdio.h&gt;
int fcloseall(void);
int _fcloseall_r (struct _reent *<var>ptr</var>);

</pre></div>
<p><strong>Description</strong><br>
<code>fcloseall</code> closes all files in the current reentrancy struct&rsquo;s domain.
The function <code>_fcloseall_r</code> is the same function, except the reentrancy
struct is passed in as the <var>ptr</var> argument.
</p>
<p>This function is not recommended as it closes all streams, including
the std streams.
</p>
<br>
<p><strong>Returns</strong><br>
<code>fclose</code> returns <code>0</code> if all closes are successful.  Otherwise,
EOF is returned.
</p>
<br>
<p><strong>Portability</strong><br>
<code>fcloseall</code> is a glibc extension.
</p>
<p>Required OS subroutines: <code>close</code>, <code>fstat</code>, <code>isatty</code>, <code>lseek</code>,
<code>read</code>, <code>sbrk</code>, <code>write</code>.
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