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6 <link rel="up" title="FatFs" href="../00index_e.html">
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8 <title>FatFs - f_truncate</title>
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15 <p>The f_truncate function truncates the file size.</p>
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17 FRESULT f_truncate (
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18 FIL* <em>FileObject</em> /* Pointer to the file object */
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27 <dd>Pointer to the open file object to be truncated.</dd>
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33 <h4>Return Values</h4>
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36 <dd>The function succeeded.</dd>
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38 <dd>The file has been opened in read-only mode.</dd>
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39 <dt>FR_DISK_ERR</dt>
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40 <dd>The function failed due to an error in the disk function.</dd>
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42 <dd>The function failed due to a wrong FAT structure or an internal error.</dd>
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43 <dt>FR_NOT_READY</dt>
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44 <dd>The disk drive cannot work due to no medium in the drive or any other reason.</dd>
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45 <dt>FR_INVALID_OBJECT</dt>
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46 <dd>The file object is invalid.</dd>
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52 <h4>Description</h4>
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53 <p>The f_truncate function truncates the file size to the current file R/W point. When the file R/W pointer is already pointing end of the file, this function has no effect. This function is not available in read-only configuration or minimization level of >=1.</p>
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59 <p><tt><a href="open.html">f_open</a>, <a href="lseek.html">f_lseek</a>, <a href="sfile.html">FIL</a></tt></p>
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63 <p class="foot"><a href="../00index_e.html">Return</a></p>
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