savelij13
bf4615c01f
- Removed a long-pending limitation that f_getcwd and double-dot .. in the path name did not work on the exFAT volume. - Fixed f_readdir cannot detect end of directory and it leads the application process into infinite loop. (appeared at R0.15b) - Fixed dot names with terminating separator or duplicated separator are rejected when LFN is not enabled.
65 lines
1.8 KiB
HTML
65 lines
1.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
|
|
<html lang="en">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
|
|
<title>FatFs - f_truncate</title>
|
|
</head>
|
|
|
|
<body>
|
|
|
|
<div class="para func">
|
|
<h2>f_truncate</h2>
|
|
<p>The f_truncate function truncates the file size.</p>
|
|
<pre>
|
|
FRESULT f_truncate (
|
|
FIL* <span class="arg">fp</span> <span class="c">/* [IN] File object */</span>
|
|
);
|
|
</pre>
|
|
</div>
|
|
|
|
<div class="para arg">
|
|
<h4>Parameter</h4>
|
|
<dl class="par">
|
|
<dt>fp</dt>
|
|
<dd>Pointer to the open file object to be truncated. If a null pointer is given, the function fails with <tt>FR_INVALID_OBJECT</tt>.</dd>
|
|
</dl>
|
|
</div>
|
|
|
|
|
|
<div class="para ret">
|
|
<h4>Return Values</h4>
|
|
<p>
|
|
<a href="rc.html#ok">FR_OK</a>,
|
|
<a href="rc.html#de">FR_DISK_ERR</a>,
|
|
<a href="rc.html#ie">FR_INT_ERR</a>,
|
|
<a href="rc.html#dn">FR_DENIED</a>,
|
|
<a href="rc.html#io">FR_INVALID_OBJECT</a>,
|
|
<a href="rc.html#tm">FR_TIMEOUT</a>
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="para desc">
|
|
<h4>Description</h4>
|
|
<p>The <tt>f_truncate</tt> function truncates the file size to the current file read/write pointer. This function has no effect if the file read/write pointer is already pointing end of the file.</p>
|
|
</div>
|
|
|
|
|
|
<div class="para comp">
|
|
<h4>QuickInfo</h4>
|
|
<p>Available when <tt><a href="config.html#fs_readonly">FF_FS_READONLY</a> == 0</tt> and <tt><a href="config.html#fs_minimize">FF_FS_MINIMIZE</a> == 0</tt>.</p>
|
|
</div>
|
|
|
|
|
|
<div class="para ref">
|
|
<h4>See Also</h4>
|
|
<p><tt><a href="open.html">f_open</a>, <a href="lseek.html">f_lseek</a>, <a href="sfile.html">FIL</a></tt></p>
|
|
</div>
|
|
|
|
|
|
<p class="foot"><a href="../index.html">Return</a></p>
|
|
</body>
|
|
</html>
|