1e6865dcdSopenharmony_ci<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 2e6865dcdSopenharmony_ci<html lang="en"> 3e6865dcdSopenharmony_ci<head> 4e6865dcdSopenharmony_ci<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5e6865dcdSopenharmony_ci<meta http-equiv="Content-Style-Type" content="text/css"> 6e6865dcdSopenharmony_ci<link rel="up" title="FatFs" href="../00index_e.html"> 7e6865dcdSopenharmony_ci<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/chdir.html"> 8e6865dcdSopenharmony_ci<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default"> 9e6865dcdSopenharmony_ci<title>FatFs - f_chdir</title> 10e6865dcdSopenharmony_ci</head> 11e6865dcdSopenharmony_ci 12e6865dcdSopenharmony_ci<body> 13e6865dcdSopenharmony_ci 14e6865dcdSopenharmony_ci<div class="para func"> 15e6865dcdSopenharmony_ci<h2>f_chdir</h2> 16e6865dcdSopenharmony_ci<p>The <tt>f_chdir</tt> function changes the current directory of the logical drive.</p> 17e6865dcdSopenharmony_ci<pre> 18e6865dcdSopenharmony_ciFRESULT f_chdir ( 19e6865dcdSopenharmony_ci const TCHAR* <span class="arg">path</span> <span class="c">/* [IN] Path name */</span> 20e6865dcdSopenharmony_ci); 21e6865dcdSopenharmony_ci</pre> 22e6865dcdSopenharmony_ci</div> 23e6865dcdSopenharmony_ci 24e6865dcdSopenharmony_ci<div class="para arg"> 25e6865dcdSopenharmony_ci<h4>Parameters</h4> 26e6865dcdSopenharmony_ci<dl class="par"> 27e6865dcdSopenharmony_ci<dt>path</dt> 28e6865dcdSopenharmony_ci<dd>Pointer to the null-terminated string that specifies the <a href="filename.html">directory</a> to be set as current directory.</dd> 29e6865dcdSopenharmony_ci</dl> 30e6865dcdSopenharmony_ci</div> 31e6865dcdSopenharmony_ci 32e6865dcdSopenharmony_ci 33e6865dcdSopenharmony_ci<div class="para ret"> 34e6865dcdSopenharmony_ci<h4>Return Values</h4> 35e6865dcdSopenharmony_ci<p> 36e6865dcdSopenharmony_ci<a href="rc.html#ok">FR_OK</a>, 37e6865dcdSopenharmony_ci<a href="rc.html#de">FR_DISK_ERR</a>, 38e6865dcdSopenharmony_ci<a href="rc.html#ie">FR_INT_ERR</a>, 39e6865dcdSopenharmony_ci<a href="rc.html#nr">FR_NOT_READY</a>, 40e6865dcdSopenharmony_ci<a href="rc.html#np">FR_NO_PATH</a>, 41e6865dcdSopenharmony_ci<a href="rc.html#in">FR_INVALID_NAME</a>, 42e6865dcdSopenharmony_ci<a href="rc.html#id">FR_INVALID_DRIVE</a>, 43e6865dcdSopenharmony_ci<a href="rc.html#ne">FR_NOT_ENABLED</a>, 44e6865dcdSopenharmony_ci<a href="rc.html#ns">FR_NO_FILESYSTEM</a>, 45e6865dcdSopenharmony_ci<a href="rc.html#tm">FR_TIMEOUT</a>, 46e6865dcdSopenharmony_ci<a href="rc.html#nc">FR_NOT_ENOUGH_CORE</a> 47e6865dcdSopenharmony_ci</p> 48e6865dcdSopenharmony_ci</div> 49e6865dcdSopenharmony_ci 50e6865dcdSopenharmony_ci 51e6865dcdSopenharmony_ci<div class="para desc"> 52e6865dcdSopenharmony_ci<h4>Description</h4> 53e6865dcdSopenharmony_ci<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> 54e6865dcdSopenharmony_ci<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> 55e6865dcdSopenharmony_ci</div> 56e6865dcdSopenharmony_ci 57e6865dcdSopenharmony_ci 58e6865dcdSopenharmony_ci<div class="para comp"> 59e6865dcdSopenharmony_ci<h4>QuickInfo</h4> 60e6865dcdSopenharmony_ci<p>Available when <tt><a href="config.html#fs_rpath">FF_FS_RPATH</a> >= 1</tt>.</p> 61e6865dcdSopenharmony_ci</div> 62e6865dcdSopenharmony_ci 63e6865dcdSopenharmony_ci 64e6865dcdSopenharmony_ci<div class="para use"> 65e6865dcdSopenharmony_ci<h4>Example</h4> 66e6865dcdSopenharmony_ci<pre> 67e6865dcdSopenharmony_ci <span class="c">/* Change current direcoty of the current drive ("dir1" under root directory) */</span> 68e6865dcdSopenharmony_ci <em>f_chdir</em>("/dir1"); 69e6865dcdSopenharmony_ci 70e6865dcdSopenharmony_ci <span class="c">/* Change current direcoty of current drive (parent directory of drive 2) */</span> 71e6865dcdSopenharmony_ci <em>f_chdir</em>("2:.."); 72e6865dcdSopenharmony_ci 73e6865dcdSopenharmony_ci <span class="c">/* Change current direcoty of the drive "sdcard" (at DOS/Windows style volume ID) */</span> 74e6865dcdSopenharmony_ci <em>f_chdir</em>("sdcard:/dir1"); 75e6865dcdSopenharmony_ci 76e6865dcdSopenharmony_ci <span class="c">/* Change current direcoty of the drive "flash" and set it as current drive (at Unix style volume ID) */</span> 77e6865dcdSopenharmony_ci <em>f_chdir</em>("/flash/dir1"); 78e6865dcdSopenharmony_ci</pre> 79e6865dcdSopenharmony_ci</div> 80e6865dcdSopenharmony_ci 81e6865dcdSopenharmony_ci<div class="para ref"> 82e6865dcdSopenharmony_ci<h4>See Also</h4> 83e6865dcdSopenharmony_ci<p><tt><a href="chdrive.html">f_chdrive</a>, <a href="getcwd.html">f_getcwd</a></tt></p> 84e6865dcdSopenharmony_ci</div> 85e6865dcdSopenharmony_ci 86e6865dcdSopenharmony_ci<p class="foot"><a href="../00index_e.html">Return</a></p> 87e6865dcdSopenharmony_ci</body> 88e6865dcdSopenharmony_ci</html> 89