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8 <title>FatFs - f_truncate
</title>
15 <p>The f_truncate function truncates the file size.
</p>
18 FIL*
<em>FileObject
</em> /* Pointer to the file object */
27 <dd>Pointer to the open file object to be truncated.
</dd>
33 <h4>Return Values
</h4>
36 <dd>The function succeeded.
</dd>
38 <dd>The file has been opened in read-only mode.
</dd>
40 <dd>The function failed due to an error in the disk function.
</dd>
42 <dd>The function failed due to a wrong FAT structure or an internal error.
</dd>
44 <dd>The disk drive cannot work due to no medium in the drive or any other reason.
</dd>
45 <dt>FR_INVALID_OBJECT
</dt>
46 <dd>The file object is invalid.
</dd>
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.
</p>
59 <p>Available when
<tt>_FS_READONLY ==
0</tt> and
<tt>_FS_MINIMIZE ==
0</tt>.
</p>
65 <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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