| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><meta http-equiv="Content-Style-Type" content="text/css"><link rel="up" title="FatFs" href="../00index_e.html"><link rel="alternate" hreflang="ja" title="Japanese" href="../ja/truncate.html"><link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default"><title>FatFs - f_truncate</title></head><body><div class="para func"><h2>f_truncate</h2><p>The f_truncate function truncates the file size.</p><pre>FRESULT f_truncate (  FIL* <span class="arg">fp</span>     <span class="c">/* [IN] File object */</span>);</pre></div><div class="para arg"><h4>Parameter</h4><dl class="par"><dt>fp</dt><dd>Pointer to the open file object to be truncated.</dd></dl></div><div class="para ret"><h4>Return Values</h4><p><a href="rc.html#ok">FR_OK</a>,<a href="rc.html#de">FR_DISK_ERR</a>,<a href="rc.html#ie">FR_INT_ERR</a>,<a href="rc.html#dn">FR_DENIED</a>,<a href="rc.html#io">FR_INVALID_OBJECT</a>,<a href="rc.html#tm">FR_TIMEOUT</a></p></div><div class="para desc"><h4>Description</h4><p>The <tt>f_truncate</tt> function truncates the file size to the current file read/write pointer. This function has no effect if the file read/write pointer is already pointing end of the file.</p></div><div class="para comp"><h4>QuickInfo</h4><p>Available when <tt>_FS_READONLY == 0</tt> and <tt>_FS_MINIMIZE == 0</tt>.</p></div><div class="para ref"><h4>See Also</h4><p><tt><a href="open.html">f_open</a>, <a href="lseek.html">f_lseek</a>, <a href="sfile.html">FIL</a></tt></p></div><p class="foot"><a href="../00index_e.html">Return</a></p></body></html>
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