1<html lang="en"> 2<head> 3<title>fclose - Untitled</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Untitled"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Stdio.html#Stdio" title="Stdio"> 9<link rel="prev" href="dprintf.html#dprintf" title="dprintf"> 10<link rel="next" href="fcloseall.html#fcloseall" title="fcloseall"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<meta http-equiv="Content-Style-Type" content="text/css"> 13<style type="text/css"><!-- 14 pre.display { font-family:inherit } 15 pre.format { font-family:inherit } 16 pre.smalldisplay { font-family:inherit; font-size:smaller } 17 pre.smallformat { font-family:inherit; font-size:smaller } 18 pre.smallexample { font-size:smaller } 19 pre.smalllisp { font-size:smaller } 20 span.sc { font-variant:small-caps } 21 span.roman { font-family:serif; font-weight:normal; } 22 span.sansserif { font-family:sans-serif; font-weight:normal; } 23--></style> 24<link rel="stylesheet" type="text/css" href="../cs.css"> 25</head> 26<body> 27<div class="node"> 28<a name="fclose"></a> 29<p> 30Next: <a rel="next" accesskey="n" href="fcloseall.html#fcloseall">fcloseall</a>, 31Previous: <a rel="previous" accesskey="p" href="dprintf.html#dprintf">dprintf</a>, 32Up: <a rel="up" accesskey="u" href="Stdio.html#Stdio">Stdio</a> 33<hr> 34</div> 35 36<h3 class="section">4.4 <code>fclose</code>—close a file</h3> 37 38<p><a name="index-fclose-154"></a><a name="index-g_t_005ffclose_005fr-155"></a><strong>Synopsis</strong> 39<pre class="example"> #include <stdio.h> 40 int fclose(FILE *<var>fp</var>); 41 int _fclose_r(struct _reent *<var>reent</var>, FILE *<var>fp</var>); 42 43</pre> 44 <p><strong>Description</strong><br> 45If the file or stream identified by <var>fp</var> is open, <code>fclose</code> closes 46it, after first ensuring that any pending data is written (by calling 47<code>fflush(</code><var>fp</var><code>)</code>). 48 49 <p>The alternate function <code>_fclose_r</code> is a reentrant version. 50The extra argument <var>reent</var> is a pointer to a reentrancy structure. 51 52 <p><br> 53<strong>Returns</strong><br> 54<code>fclose</code> returns <code>0</code> if successful (including when <var>fp</var> is 55<code>NULL</code> or not an open file); otherwise, it returns <code>EOF</code>. 56 57 <p><br> 58<strong>Portability</strong><br> 59<code>fclose</code> is required by ANSI C. 60 61 <p>Required OS subroutines: <code>close</code>, <code>fstat</code>, <code>isatty</code>, <code>lseek</code>, 62<code>read</code>, <code>sbrk</code>, <code>write</code>. 63 64 <p><br> 65 66 </body></html> 67 68