1<html lang="en"> 2<head> 3<title>fdopen - 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="fcloseall.html#fcloseall" title="fcloseall"> 10<link rel="next" href="feof.html#feof" title="feof"> 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="fdopen"></a> 29<p> 30Next: <a rel="next" accesskey="n" href="feof.html#feof">feof</a>, 31Previous: <a rel="previous" accesskey="p" href="fcloseall.html#fcloseall">fcloseall</a>, 32Up: <a rel="up" accesskey="u" href="Stdio.html#Stdio">Stdio</a> 33<hr> 34</div> 35 36<h3 class="section">4.6 <code>fdopen</code>—turn open file into a stream</h3> 37 38<p><a name="index-fdopen-158"></a><a name="index-g_t_005ffdopen_005fr-159"></a><strong>Synopsis</strong> 39<pre class="example"> #include <stdio.h> 40 FILE *fdopen(int <var>fd</var>, const char *<var>mode</var>); 41 FILE *_fdopen_r(struct _reent *<var>reent</var>, 42 int <var>fd</var>, const char *<var>mode</var>); 43 44</pre> 45 <p><strong>Description</strong><br> 46<code>fdopen</code> produces a file descriptor of type <code>FILE *</code>, from a 47descriptor for an already-open file (returned, for example, by the 48system subroutine <code>open</code> rather than by <code>fopen</code>). 49The <var>mode</var> argument has the same meanings as in <code>fopen</code>. 50 51 <p><br> 52<strong>Returns</strong><br> 53File pointer or <code>NULL</code>, as for <code>fopen</code>. 54 55 <p><br> 56<strong>Portability</strong><br> 57<code>fdopen</code> is ANSI. 58 59 <p><br> 60 61 </body></html> 62 63