savelij13
47e601681a
- Fixed a complie error when FF_FS_LOCK != 0. - Fixed a potential issue when work FatFs concurrency with FF_FS_REENTRANT, FF_VOLUMES >= 2 and FF_FS_LOCK > 0. - Made f_setlabel() accept a volume label in Unix style volume ID when FF_STR_VOLUME_ID == 2. - Made FatFs update PercInUse field in exFAT VBR. (A preceding f_getfree() is needed for the accuracy)
88 lines
2.9 KiB
HTML
88 lines
2.9 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_chdir</title>
|
|
</head>
|
|
|
|
<body>
|
|
|
|
<div class="para func">
|
|
<h2>f_chdir</h2>
|
|
<p>The <tt>f_chdir</tt> function changes the current directory of the logical drive.</p>
|
|
<pre>
|
|
FRESULT f_chdir (
|
|
const TCHAR* <span class="arg">path</span> <span class="c">/* [IN] Path name */</span>
|
|
);
|
|
</pre>
|
|
</div>
|
|
|
|
<div class="para arg">
|
|
<h4>Parameters</h4>
|
|
<dl class="par">
|
|
<dt>path</dt>
|
|
<dd>Pointer to the null-terminated string that specifies the <a href="filename.html">directory</a> to be set as current directory.</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#nr">FR_NOT_READY</a>,
|
|
<a href="rc.html#np">FR_NO_PATH</a>,
|
|
<a href="rc.html#in">FR_INVALID_NAME</a>,
|
|
<a href="rc.html#id">FR_INVALID_DRIVE</a>,
|
|
<a href="rc.html#ne">FR_NOT_ENABLED</a>,
|
|
<a href="rc.html#ns">FR_NO_FILESYSTEM</a>,
|
|
<a href="rc.html#tm">FR_TIMEOUT</a>,
|
|
<a href="rc.html#nc">FR_NOT_ENOUGH_CORE</a>
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="para desc">
|
|
<h4>Description</h4>
|
|
<p>The <tt>f_chdir</tt> function changes the current directory of the logical drive. Also the current drive will be changed when in Unix style drive prefix, <tt><a href="config.html#str_volume_id">FF_STR_VOLUME_ID</a> == 2</tt>. The current directory of each logical drive is initialized to the root directory on mount.</p>
|
|
<p>Note that the current directory is retained in the each file system object and the current drive is retained in a static variable, so that it also affects other tasks that use the file functions.</p>
|
|
</div>
|
|
|
|
|
|
<div class="para comp">
|
|
<h4>QuickInfo</h4>
|
|
<p>Available when <tt><a href="config.html#fs_rpath">FF_FS_RPATH</a> >= 1</tt>.</p>
|
|
</div>
|
|
|
|
|
|
<div class="para use">
|
|
<h4>Example</h4>
|
|
<pre>
|
|
<span class="c">/* Change current direcoty of the current drive ("dir1" under root directory) */</span>
|
|
<em>f_chdir</em>("/dir1");
|
|
|
|
<span class="c">/* Change current direcoty of current drive (parent directory of drive 2) */</span>
|
|
<em>f_chdir</em>("2:..");
|
|
|
|
<span class="c">/* Change current direcoty of the drive "sdcard" (at DOS/Windows style volume ID) */</span>
|
|
<em>f_chdir</em>("sdcard:/dir1");
|
|
|
|
<span class="c">/* Change current direcoty of the drive "flash" and set it as current drive (at Unix style volume ID) */</span>
|
|
<em>f_chdir</em>("/flash/dir1");
|
|
</pre>
|
|
</div>
|
|
|
|
<div class="para ref">
|
|
<h4>See Also</h4>
|
|
<p><tt><a href="chdrive.html">f_chdrive</a>, <a href="getcwd.html">f_getcwd</a></tt></p>
|
|
</div>
|
|
|
|
|
|
<p class="foot"><a href="../00index_e.html">Return</a></p>
|
|
</body>
|
|
</html>
|