- check for 'chattr' command, and use 'chflags' (FreeBSD) if not found, fixes #339

- add license-header to function.storeDefaultIndex.php

lib/functions/filedir/function.fileImmutable.php

@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * This file is part of the Froxlor project.
+ * Copyright (c) 2010 the Froxlor Team (see authors).
+ *
+ * For the full copyright and license information, please view the COPYING
+ * file that was distributed with this source code. You can also view the
+ * COPYING file online at http://files.froxlor.org/misc/COPYING.txt
+ *
+ * @copyright  (c) the authors
+ * @author     Froxlor team <team@froxlor.org> (2010-)
+ * @license    GPLv2 http://files.froxlor.org/misc/COPYING.txt
+ * @package    Functions
+ * @version    $Id$
+ */
+
+/**
+ * set the immutable flag for a file
+ * 
+ * @param string $filename the file to set the flag for
+ * 
+ * @return boolean
+ */
+function setImmutable($filename = null)
+{
+	safe_exec(_getImmutableFunction(false).escapeshellarg($filename));
+}
+
+/**
+ * removes the immutable flag for a file
+ * 
+ * @param string $filename the file to set the flag for
+ * 
+ * @return boolean
+ */
+function removeImmutable($filename = null)
+{
+	safe_exec(_getImmutableFunction(true).escapeshellarg($filename));
+}
+
+/**
+ * internal function to check whether
+ * to use chattr (Linux) or chflags (FreeBSD)
+ * 
+ * @param boolean $remove whether to use +i|schg (false) or -i|noschg (true)
+ * 
+ * @return string functionname + parameter (not the file)
+ */
+function _getImmutableFunction($remove = false)
+{
+	$output = array();
+	$return_var = 0;
+	exec('which chattr 2>&1', $output, $return_var);
+
+	if((int)$return_var != 0)
+	{
+		// FreeBSD style
+		return 'chflags '.($remove === true) ? 'noschg ' : 'schg ';  
+	}
+	else
+	{
+		// Linux style
+		return 'chattr '.($remove === true) ? '-i ' : '+i ';
+	}
+}