From bd24602a42658bfb2647213743aa4497293e7242 Mon Sep 17 00:00:00 2001
From: Ralf Becker <RalfBecker@outdoor-training.de>
Date: Fri, 12 Aug 2016 09:29:40 +0200
Subject: [PATCH] * Filemanager: fix not working changing owner or group of a
 file/directory (as root!)

---
 api/src/Vfs.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/api/src/Vfs.php b/api/src/Vfs.php
index 36a7ee2be1..8b74d41ea0 100644
--- a/api/src/Vfs.php
+++ b/api/src/Vfs.php
@@ -2352,7 +2352,7 @@ class Vfs
 	 */
 	static function chown($path,$owner)
 	{
-		return $path[0] == '/' && chown(self::PREFIX.$path, $owner);
+		return $path[0] == '/' && chown(self::PREFIX.$path, is_numeric($owner) ? abs($owner) : $owner);
 	}
 
 	/**
@@ -2366,7 +2366,7 @@ class Vfs
 	 */
 	static function chgrp($path,$group)
 	{
-		return $path[0] == '/' && chgrp(self::PREFIX.$path, $group);
+		return $path[0] == '/' && chgrp(self::PREFIX.$path, is_numeric($group) ? abs($group) : $group);
 	}
 
 	/**