1e6865dcdSopenharmony_ci<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 2e6865dcdSopenharmony_ci<html lang="en"> 3e6865dcdSopenharmony_ci<head> 4e6865dcdSopenharmony_ci<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5e6865dcdSopenharmony_ci<meta http-equiv="Content-Style-Type" content="text/css"> 6e6865dcdSopenharmony_ci<link rel="up" title="FatFs" href="../00index_e.html"> 7e6865dcdSopenharmony_ci<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/truncate.html"> 8e6865dcdSopenharmony_ci<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default"> 9e6865dcdSopenharmony_ci<title>FatFs - f_truncate</title> 10e6865dcdSopenharmony_ci</head> 11e6865dcdSopenharmony_ci 12e6865dcdSopenharmony_ci<body> 13e6865dcdSopenharmony_ci 14e6865dcdSopenharmony_ci<div class="para func"> 15e6865dcdSopenharmony_ci<h2>f_truncate</h2> 16e6865dcdSopenharmony_ci<p>The f_truncate function truncates the file size.</p> 17e6865dcdSopenharmony_ci<pre> 18e6865dcdSopenharmony_ciFRESULT f_truncate ( 19e6865dcdSopenharmony_ci FIL* <span class="arg">fp</span> <span class="c">/* [IN] File object */</span> 20e6865dcdSopenharmony_ci); 21e6865dcdSopenharmony_ci</pre> 22e6865dcdSopenharmony_ci</div> 23e6865dcdSopenharmony_ci 24e6865dcdSopenharmony_ci<div class="para arg"> 25e6865dcdSopenharmony_ci<h4>Parameter</h4> 26e6865dcdSopenharmony_ci<dl class="par"> 27e6865dcdSopenharmony_ci<dt>fp</dt> 28e6865dcdSopenharmony_ci<dd>Pointer to the open file object to be truncated.</dd> 29e6865dcdSopenharmony_ci</dl> 30e6865dcdSopenharmony_ci</div> 31e6865dcdSopenharmony_ci 32e6865dcdSopenharmony_ci 33e6865dcdSopenharmony_ci<div class="para ret"> 34e6865dcdSopenharmony_ci<h4>Return Values</h4> 35e6865dcdSopenharmony_ci<p> 36e6865dcdSopenharmony_ci<a href="rc.html#ok">FR_OK</a>, 37e6865dcdSopenharmony_ci<a href="rc.html#de">FR_DISK_ERR</a>, 38e6865dcdSopenharmony_ci<a href="rc.html#ie">FR_INT_ERR</a>, 39e6865dcdSopenharmony_ci<a href="rc.html#dn">FR_DENIED</a>, 40e6865dcdSopenharmony_ci<a href="rc.html#io">FR_INVALID_OBJECT</a>, 41e6865dcdSopenharmony_ci<a href="rc.html#tm">FR_TIMEOUT</a> 42e6865dcdSopenharmony_ci</p> 43e6865dcdSopenharmony_ci</div> 44e6865dcdSopenharmony_ci 45e6865dcdSopenharmony_ci 46e6865dcdSopenharmony_ci<div class="para desc"> 47e6865dcdSopenharmony_ci<h4>Description</h4> 48e6865dcdSopenharmony_ci<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> 49e6865dcdSopenharmony_ci</div> 50e6865dcdSopenharmony_ci 51e6865dcdSopenharmony_ci 52e6865dcdSopenharmony_ci<div class="para comp"> 53e6865dcdSopenharmony_ci<h4>QuickInfo</h4> 54e6865dcdSopenharmony_ci<p>Available when <tt><a href="config.html#fs_readonly">FF_FS_READONLY</a> == 0</tt> and <tt><a href="config.html#fs_minimize">FF_FS_MINIMIZE</a> == 0</tt>.</p> 55e6865dcdSopenharmony_ci</div> 56e6865dcdSopenharmony_ci 57e6865dcdSopenharmony_ci 58e6865dcdSopenharmony_ci<div class="para ref"> 59e6865dcdSopenharmony_ci<h4>See Also</h4> 60e6865dcdSopenharmony_ci<p><tt><a href="open.html">f_open</a>, <a href="lseek.html">f_lseek</a>, <a href="sfile.html">FIL</a></tt></p> 61e6865dcdSopenharmony_ci</div> 62e6865dcdSopenharmony_ci 63e6865dcdSopenharmony_ci 64e6865dcdSopenharmony_ci<p class="foot"><a href="../00index_e.html">Return</a></p> 65e6865dcdSopenharmony_ci</body> 66e6865dcdSopenharmony_ci</html> 67