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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [FileSystem/] [FatFs-0.7e/] [doc/] [en/] [truncate.html] - Rev 637
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<!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="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default"> <title>FatFs - f_truncate</title> </head> <body> <div class="para"> <h2>f_truncate</h2> <p>The f_truncate function truncates the file size.</p> <pre> FRESULT f_truncate ( FIL* <em>FileObject</em> /* Pointer to the file object */ ); </pre> </div> <div class="para"> <h4>Parameter</h4> <dl class="par"> <dt>FileObject</dt> <dd>Pointer to the open file object to be truncated.</dd> </dl> </div> <div class="para"> <h4>Return Values</h4> <dl class="ret"> <dt>FR_OK (0)</dt> <dd>The function succeeded.</dd> <dt>FR_DENIED</dt> <dd>The file has been opened in read-only mode.</dd> <dt>FR_DISK_ERR</dt> <dd>The function failed due to an error in the disk function.</dd> <dt>FR_INT_ERR</dt> <dd>The function failed due to a wrong FAT structure or an internal error.</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_INVALID_OBJECT</dt> <dd>The file object is invalid.</dd> </dl> </div> <div class="para"> <h4>Description</h4> <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> </div> <div class="para"> <h4>QuickInfo</h4> <p>Available when <tt>_FS_READONLY == 0</tt> and <tt>_FS_MINIMIZE == 0</tt>.</p> </div> <div class="para"> <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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