You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
4.2 KiB
HTML
104 lines
4.2 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<title>setbuffer (The Red Hat newlib C Library)</title>
|
|
|
|
<meta name="description" content="setbuffer (The Red Hat newlib C Library)">
|
|
<meta name="keywords" content="setbuffer (The Red Hat newlib C Library)">
|
|
<meta name="resource-type" content="document">
|
|
<meta name="distribution" content="global">
|
|
<meta name="Generator" content="makeinfo">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<link href="index.html#Top" rel="start" title="Top">
|
|
<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
|
|
<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
|
<link href="Stdio.html#Stdio" rel="up" title="Stdio">
|
|
<link href="setlinebuf.html#setlinebuf" rel="next" title="setlinebuf">
|
|
<link href="setbuf.html#setbuf" rel="prev" title="setbuf">
|
|
<style type="text/css">
|
|
<!--
|
|
a.summary-letter {text-decoration: none}
|
|
blockquote.indentedblock {margin-right: 0em}
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
|
blockquote.smallquotation {font-size: smaller}
|
|
div.display {margin-left: 3.2em}
|
|
div.example {margin-left: 3.2em}
|
|
div.lisp {margin-left: 3.2em}
|
|
div.smalldisplay {margin-left: 3.2em}
|
|
div.smallexample {margin-left: 3.2em}
|
|
div.smalllisp {margin-left: 3.2em}
|
|
kbd {font-style: oblique}
|
|
pre.display {font-family: inherit}
|
|
pre.format {font-family: inherit}
|
|
pre.menu-comment {font-family: serif}
|
|
pre.menu-preformatted {font-family: serif}
|
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
|
pre.smallexample {font-size: smaller}
|
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
|
pre.smalllisp {font-size: smaller}
|
|
span.nolinebreak {white-space: nowrap}
|
|
span.roman {font-family: initial; font-weight: normal}
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
|
ul.no-bullet {list-style: none}
|
|
-->
|
|
</style>
|
|
|
|
|
|
</head>
|
|
|
|
<body lang="en">
|
|
<a name="setbuffer"></a>
|
|
<div class="header">
|
|
<p>
|
|
Next: <a href="setlinebuf.html#setlinebuf" accesskey="n" rel="next">setlinebuf</a>, Previous: <a href="setbuf.html#setbuf" accesskey="p" rel="prev">setbuf</a>, Up: <a href="Stdio.html#Stdio" accesskey="u" rel="up">Stdio</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
|
|
</div>
|
|
<hr>
|
|
<a name="setbuffer_002d_002d_002dspecify-full-buffering-for-a-file-or-stream-with-size"></a>
|
|
<h3 class="section">4.56 <code>setbuffer</code>—specify full buffering for a file or stream with size</h3>
|
|
<a name="index-setbuffer"></a>
|
|
<p><strong>Synopsis</strong>
|
|
</p><div class="example">
|
|
<pre class="example">#include <stdio.h>
|
|
void setbuffer(FILE *<var>fp</var>, char *<var>buf</var>, int <var>size</var>);
|
|
|
|
</pre></div>
|
|
<p><strong>Description</strong><br>
|
|
<code>setbuffer</code> specifies that output to the file or stream identified by
|
|
<var>fp</var> should be fully buffered. All output for this file will go to a
|
|
buffer (of size <var>size</var>). Output will be passed on to the host system
|
|
only when the buffer is full, or when an input operation intervenes.
|
|
</p>
|
|
<p>You may, if you wish, supply your own buffer by passing a pointer to
|
|
it as the argument <var>buf</var>. It must have size <var>size</var>. You can
|
|
also use <code>NULL</code> as the value of <var>buf</var>, to signal that the
|
|
<code>setbuffer</code> function is to allocate the buffer.
|
|
</p>
|
|
<br>
|
|
<p><strong>Warnings</strong><br>
|
|
You may only use <code>setbuffer</code> before performing any file operation
|
|
other than opening the file.
|
|
</p>
|
|
<p>If you supply a non-null <var>buf</var>, you must ensure that the associated
|
|
storage continues to be available until you close the stream
|
|
identified by <var>fp</var>.
|
|
</p>
|
|
<br>
|
|
<p><strong>Returns</strong><br>
|
|
<code>setbuffer</code> does not return a result.
|
|
</p>
|
|
<br>
|
|
<p><strong>Portability</strong><br>
|
|
This function comes from BSD not ANSI or POSIX.
|
|
</p>
|
|
<p>Supporting OS subroutines required: <code>close</code>, <code>fstat</code>, <code>isatty</code>,
|
|
<code>lseek</code>, <code>read</code>, <code>sbrk</code>, <code>write</code>.
|
|
</p>
|
|
<br>
|
|
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|