diff --git a/htdocs/admin/perms.php b/htdocs/admin/perms.php
index e70fb39c3bd..ae5ffc02aea 100644
--- a/htdocs/admin/perms.php
+++ b/htdocs/admin/perms.php
@@ -26,6 +26,7 @@
 
 require("../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/core/lib/admin.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/functions2.lib.php");
 
 $langs->load("admin");
 $langs->load("users");
@@ -79,37 +80,13 @@ $db->begin();
 
 // Charge les modules soumis a permissions
 $modules = array();
-$modulesdir = array();
-
-foreach ($conf->file->dol_document_root as $type => $dirroot)
-{
-    $modulesdir[] = $dirroot . "/core/modules/";
-
-    if ($type == 'alt')
-    {
-        $handle=@opendir($dirroot);
-        if (is_resource($handle))
-        {
-            while (($file = readdir($handle))!==false)
-            {
-                if (is_dir($dirroot.'/'.$file) && substr($file, 0, 1) <> '.' && substr($file, 0, 3) <> 'CVS' && $file != 'includes')
-                {
-                    if (is_dir($dirroot . '/' . $file . '/core/modules/'))
-                    {
-                        $modulesdir[] = $dirroot . '/' . $file . '/core/modules/';
-                    }
-                }
-            }
-            closedir($handle);
-        }
-    }
-}
+$modulesdir = dolGetModulesDirs();
 
 foreach ($modulesdir as $dir)
 {
     // Load modules attributes in arrays (name, numero, orders) from dir directory
     //print $dir."\n<br>";
-    $handle=@opendir($dir);
+    $handle=@opendir(dol_osencode($dir));
     if (is_resource($handle))
     {
         while (($file = readdir($handle))!==false)
diff --git a/htdocs/core/lib/functions2.lib.php b/htdocs/core/lib/functions2.lib.php
index f44aea29ed8..5a1866dbc99 100644
--- a/htdocs/core/lib/functions2.lib.php
+++ b/htdocs/core/lib/functions2.lib.php
@@ -25,6 +25,44 @@
  */
 
 
+/**
+ * Return list of modules directories
+ *
+ * @param	string	$subdir		Sub directory (Example: '/mailings')
+ * @return	array				Array of directories that can contains module descriptors
+ */
+function dolGetModulesDirs($subdir='')
+{
+    global $conf;
+
+    $modulesdir=array();
+
+    foreach ($conf->file->dol_document_root as $type => $dirroot)
+    {
+        // Default core/modules dir
+        $modulesdir[$dirroot . '/core/modules'.$subdir.'/'] = $dirroot . '/core/modules'.$subdir.'/';
+
+        // Scan dir from external modules
+        $handle=@opendir($dirroot);
+        if (is_resource($handle))
+        {
+            while (($file = readdir($handle))!==false)
+            {
+                if (is_dir($dirroot.'/'.$file) && substr($file, 0, 1) <> '.' && substr($file, 0, 3) <> 'CVS' && $file != 'includes')
+                {
+                    if (is_dir($dirroot . '/' . $file . '/core/modules'.$subdir.'/'))
+                    {
+                        $modulesdir[$dirroot . '/' . $file . '/core/modules'.$subdir.'/'] = $dirroot . '/' . $file . '/core/modules'.$subdir.'/';
+                    }
+                }
+            }
+            closedir($handle);
+        }
+    }
+    return $modulesdir;
+}
+
+
 /**
  *  Try to guess default paper format according to language into $langs
  *
diff --git a/htdocs/user/group/perms.php b/htdocs/user/group/perms.php
index 391d8793462..59fd1b32cb0 100644
--- a/htdocs/user/group/perms.php
+++ b/htdocs/user/group/perms.php
@@ -27,6 +27,7 @@
 require("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT.'/user/class/usergroup.class.php');
 require_once(DOL_DOCUMENT_ROOT."/core/lib/usergroups.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/functions2.lib.php");
 
 $langs->load("users");
 $langs->load("admin");
@@ -91,42 +92,17 @@ if ($id)
     $title = $langs->trans("Group");
     dol_fiche_head($head, 'rights', $title, 0, 'group');
 
-
-    $db->begin();
-
     // Charge les modules soumis a permissions
     $modules = array();
-    $modulesdir = array();
+    $modulesdir = dolGetModulesDirs();
 
-	foreach ($conf->file->dol_document_root as $type => $dirroot)
-	{
-		$modulesdir[] = $dirroot . "/core/modules/";
-
-		if ($type == 'alt')
-		{
-			$handle=@opendir($dirroot);
-			if (is_resource($handle))
-			{
-				while (($file = readdir($handle))!==false)
-				{
-				    if (is_dir($dirroot.'/'.$file) && substr($file, 0, 1) <> '.' && substr($file, 0, 3) <> 'CVS' && $file != 'includes')
-				    {
-				    	if (is_dir($dirroot . '/' . $file . '/core/modules/'))
-				    	{
-				    		$modulesdir[] = $dirroot . '/' . $file . '/core/modules/';
-				    	}
-				    }
-				}
-				closedir($handle);
-			}
-		}
-	}
+    $db->begin();
 
     foreach ($modulesdir as $dir)
     {
         // Load modules attributes in arrays (name, numero, orders) from dir directory
         //print $dir."\n<br>";
-        $handle=@opendir($dir);
+        $handle=@opendir(dol_osencode($dir));
         if (is_resource($handle))
         {
             while (($file = readdir($handle))!==false)
@@ -134,7 +110,7 @@ if ($id)
                 if (is_readable($dir.$file) && substr($file, 0, 3) == 'mod'  && substr($file, dol_strlen($file) - 10) == '.class.php')
                 {
                     $modName = substr($file, 0, dol_strlen($file) - 10);
-                    
+
                     if ($modName)
                     {
                         include_once($dir."/".$file);
diff --git a/htdocs/user/perms.php b/htdocs/user/perms.php
index 538ab04d5e4..93eb28b4056 100644
--- a/htdocs/user/perms.php
+++ b/htdocs/user/perms.php
@@ -26,6 +26,7 @@
 
 require("../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/core/lib/usergroups.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/functions2.lib.php");
 
 $langs->load("users");
 $langs->load("admin");
@@ -122,35 +123,11 @@ $db->begin();
 
 // Search all modules with permission and reload permissions def.
 $modules = array();
-$modulesdir = array();
-
-foreach ($conf->file->dol_document_root as $type => $dirroot)
-{
-	$modulesdir[] = $dirroot . "/core/modules/";
-
-	if ($type == 'alt')
-	{
-		$handle=@opendir($dirroot);
-		if (is_resource($handle))
-		{
-			while (($file = readdir($handle))!==false)
-			{
-			    if (is_dir($dirroot.'/'.$file) && substr($file, 0, 1) <> '.' && substr($file, 0, 3) <> 'CVS' && $file != 'includes')
-			    {
-			    	if (is_dir($dirroot . '/' . $file . '/core/modules/'))
-			    	{
-			    		$modulesdir[] = $dirroot . '/' . $file . '/core/modules/';
-			    	}
-			    }
-			}
-			closedir($handle);
-		}
-	}
-}
+$modulesdir = dolGetModulesDirs();
 
 foreach($modulesdir as $dir)
 {
-	$handle=@opendir($dir);
+	$handle=@opendir(dol_osencode($dir));
     if (is_resource($handle))
     {
     	while (($file = readdir($handle))!==false)