* Get the size of a file
*
* @param fname Filename to check
- * @return size of file, or -1 if an error ocurred
+ * @param size size of file is returned if no error
+ * @return 0 on success or -1 if an error ocurred
*/
-ssize_t os_get_filesize(const char *fname);
+int os_get_filesize(const char *fname, loff_t *size);
/**
* Write a character to the controlling OS terminal