savelij13
ddc7b41474
- Limited number of recursive calls in f_findnext(). - Fixed old floppy disks formatted with MS-DOS 2.x and 3.x cannot be mounted. - Fixed some compiler warnings.
91 lines
2.9 KiB
HTML
91 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="up" title="FatFs" href="../00index_e.html">
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<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/getlabel.html">
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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_getlabel</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_getlabel</h2>
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<p>The f_getlabel function returns volume label and volume serial number of a volume.</p>
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<pre>
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FRESULT f_getlabel (
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const TCHAR* <span class="arg">path</span>, <span class="c">/* [IN] Drive number */</span>
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TCHAR* <span class="arg">label</span>, <span class="c">/* [OUT] Volume label */</span>
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DWORD* <span class="arg">vsn</span> <span class="c">/* [OUT] Volume serial number */</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">logical drive</a>. Null-string specifies the default drive.</dd>
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<dt>label</dt>
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<dd>Pointer to the buffer to store the volume label. If the volume has no label, a null-string will be returned. Set null pointer if this information is not needed. The buffer size should be shown below at least to avoid buffer overflow.<br>
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<table class="lst2">
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<tr><td>Configuration</td><td>FF_FS_EXFAT == 0</td><td>FF_FS_EXFAT == 1</td></tr>
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<tr><td>FF_USE_LFN == 0</td><td>12 items</td><td>-</td></tr>
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<tr><td>FF_LFN_UNICODE == 0</td><td>12 items</td><td>23 items</td></tr>
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<tr><td>FF_LFN_UNICODE == 1,3</td><td>12 items</td><td>12 items</td></tr>
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<tr><td>FF_LFN_UNICODE == 2</td><td>34 items</td><td>34 items</td></tr>
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</table>
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</dd>
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<dt>vsn</dt>
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<dd>Pointer to the <tt>DWORD</tt> variable to store the volume serial number. Set null pointer if this information is not needed.</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#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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</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#use_label">FF_USE_LABEL</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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char str[12];
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<span class="c">/* Get volume label of the default drive */</span>
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<em>f_getlabel</em>("", str, 0);
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<span class="c">/* Get volume label of the drive 2 */</span>
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<em>f_getlabel</em>("2:", str, 0);
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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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<tt><a href="setlabel.html">f_setlabel</a></tt>
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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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