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">
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta http-equiv="Content-Style-Type" content="text/css">
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<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
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<title>FatFs - f_chdir</title>
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</head>
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<body>
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<div class="para func">
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<h2>f_chdir</h2>
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<p>The <tt>f_chdir</tt> function changes the current directory of the logical drive.</p>
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<pre>
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FRESULT f_chdir (
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const TCHAR* <span class="arg">path</span> <span class="c">/* [IN] Path name */</span>
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);
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</pre>
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</div>
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<div class="para arg">
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<h4>Parameters</h4>
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<dl class="par">
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<dt>path</dt>
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<dd>Pointer to the null-terminated string that specifies the <a href="filename.html">directory</a> to be set as current directory.</dd>
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</dl>
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</div>
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<div class="para ret">
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<h4>Return Values</h4>
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<p>
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<a href="rc.html#ok">FR_OK</a>,
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<a href="rc.html#de">FR_DISK_ERR</a>,
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<a href="rc.html#ie">FR_INT_ERR</a>,
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<a href="rc.html#nr">FR_NOT_READY</a>,
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<a href="rc.html#np">FR_NO_PATH</a>,
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<a href="rc.html#in">FR_INVALID_NAME</a>,
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<a href="rc.html#id">FR_INVALID_DRIVE</a>,
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<a href="rc.html#ne">FR_NOT_ENABLED</a>,
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<a href="rc.html#ns">FR_NO_FILESYSTEM</a>,
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<a href="rc.html#tm">FR_TIMEOUT</a>,
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<a href="rc.html#nc">FR_NOT_ENOUGH_CORE</a>
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</p>
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</div>
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<div class="para desc">
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<h4>Description</h4>
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<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>
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<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>
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</div>
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<div class="para comp">
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<h4>QuickInfo</h4>
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<p>Available when <tt><a href="config.html#fs_rpath">FF_FS_RPATH</a> >= 1</tt>.</p>
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</div>
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<div class="para use">
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<h4>Example</h4>
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<pre>
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<span class="c">/* Change current direcoty of the current drive ("dir1" under root directory) */</span>
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<em>f_chdir</em>("/dir1");
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<span class="c">/* Change current direcoty of current drive (parent directory of drive 2) */</span>
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<em>f_chdir</em>("2:..");
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<span class="c">/* Change current direcoty of the drive "sdcard" (at DOS/Windows style volume ID) */</span>
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<em>f_chdir</em>("sdcard:/dir1");
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<span class="c">/* Change current direcoty of the drive "flash" and set it as current drive (at Unix style volume ID) */</span>
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<em>f_chdir</em>("/flash/dir1");
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</pre>
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</div>
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<div class="para ref">
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<h4>See Also</h4>
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<p><tt><a href="chdrive.html">f_chdrive</a>, <a href="getcwd.html">f_getcwd</a></tt></p>
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</div>
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<p class="foot"><a href="../00index_e.html">Return</a></p>
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</body>
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</html>
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