?? getfree.html
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<title>FatFs - f_getfree</title>
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<div class="para">
<h2>f_getfree</h2>
<p>The f_getfree gets number of the free clusters.</p>
<pre>
FRESULT f_getfree (
DWORD* <em>Clusters</em> // Pointer to the variable to store number of free clusters.
);
</pre>
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<div class="para">
<h4>Parameters</h4>
<dl class="par">
<dt>Clusters</dt>
<dd>Pointer to the DWORD variable to store number of free clusters.</dd>
</dl>
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<div class="para">
<h4>Return Values</h4>
<dl class="ret">
<dt>FR_OK (0)</dt>
<dd>The function succeeded. The <tt><em>*Clusters</em></tt> havs number of free clusters.</dd>
<dt>FR_NOT_READY</dt>
<dd>The disk drive cannot work due to no medium in the drive or any other reason.</dd>
<dt>FR_RW_ERROR</dt>
<dd>Any error occured in low level disk I/O.</dd>
<dt>FR_INCORRECT_DISK_CHANGE</dt>
<dd>Incorrect disk removal, such as a medium change during any file is opend, has been occured.</dd>
<dt>FR_NOT_ENABLED</dt>
<dd>FatFs module has not been enabled.</dd>
<dt>FR_NO_FILESYSTEM</dt>
<dd>There is no valid FAT partition on the disk.</dd>
</dl>
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<div class="para">
<h4>Descriptions</h4>
<p>The f_getfree gets number of free clusters on the drive. The <tt>FatFs.sects_clust</tt> is indicating number of sectors per cluster, so that the free space in unit of byte can be calcurated with this. This function is not supported in minimum configuration.</p>
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<div class="para">
<h4>Samples Code</h4>
<pre>
DWORD clust;
// Get free clusters
res = f_getfree(&clust);
if (res) die(res);
// Get free bytes
printf("%lu bytes available on the disk.\n", clust * FatFs->sects_clust * 512);
</pre>
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<div class="para">
<h4>References</h4>
<p><tt><a href="sfatfs.html">FATFS</a></tt></p>
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<p class="foot"><a href="../00index_e.html">Return</a></p>
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