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