1 files changed, 16 insertions, 13 deletions
diff --git a/xmake/core/base/os.lua b/xmake/core/base/os.lua
index 02d96ad7e..ea6d3a9b0 100644
--- a/xmake/core/base/os.lua
+++ b/xmake/core/base/os.lua
@@ -34,6 +34,7 @@ local string    = require("base/string")
 
 -- save original interfaces
 os._uid         = os._uid or os.uid
+os._gid         = os._gid or os.gid
 os._mkdir       = os._mkdir or os.mkdir
 os._rmdir       = os._rmdir or os.rmdir
 os._tmpdir      = os._tmpdir or os.tmpdir
@@ -627,30 +628,32 @@ function os.nuldev()
 end
 
 -- get uid
-function os.uid()
-
-    -- get it from cache first
-    if os._UID then
-        return os._UID
-    end
-
+function os.uid(...)
     -- get uid
     os._UID = {}
     if os._uid then
-        os._UID = os._uid() or {}
+        os._UID = os._uid(...) or {}
     end
 
     -- ok?
     return os._UID
 end
 
+-- get gid
+function os.gid(...)
+    -- get gid
+    os._GID = {}
+    if os._gid then
+        os._GID = os._gid(...) or {}
+    end
+
+    -- ok?
+    return os._GID
+end
+
 -- check run command as root
 function os.isroot()
-
-    -- get it from cache
-    if os._ISROOT ~= nil then
-        return os._ISROOT
-    end
+    os._ISROOT = nil
 
     -- check it
     if os.uid().euid == 0 then