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<h3 class="section">4.4 <code>fclose</code>&mdash;close a file</h3>
<a name="index-fclose"></a>
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<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;stdio.h&gt;
int fclose(FILE *<var>fp</var>);
int _fclose_r(struct _reent *<var>reent</var>, FILE *<var>fp</var>);

</pre></div>
<p><strong>Description</strong><br>
If the file or stream identified by <var>fp</var> is open, <code>fclose</code> closes
it, after first ensuring that any pending data is written (by calling
<code>fflush(<var>fp</var>)</code>).
</p>
<p>The alternate function <code>_fclose_r</code> is a reentrant version.
The extra argument <var>reent</var> is a pointer to a reentrancy structure.
</p>
<br>
<p><strong>Returns</strong><br>
<code>fclose</code> returns <code>0</code> if successful (including when <var>fp</var> is
<code>NULL</code> or not an open file); otherwise, it returns <code>EOF</code>.
</p>
<br>
<p><strong>Portability</strong><br>
<code>fclose</code> is required by ANSI C.
</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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