From c5e1ff25cedc953a8a4a81b6304d6f949e916662 Mon Sep 17 00:00:00 2001
From: Aleksey Morarash <aleksey.morarash@gmail.com>
Date: Tue, 15 Oct 2013 15:43:16 +0300
Subject: [PATCH] set target user groups before setuid'ing

---
 daemon/daemon.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/daemon/daemon.py b/daemon/daemon.py
index f8be1dc..e762ea0 100644
--- a/daemon/daemon.py
+++ b/daemon/daemon.py
@@ -25,6 +25,8 @@
 import signal
 import socket
 import atexit
+import pwd
+import grp
 
 
 class DaemonError(Exception):
@@ -514,6 +516,12 @@ def change_process_owner(uid, gid):
 
         """
     try:
+        user_struct = pwd.getpwuid(uid)
+        groups = [group_struct.gr_gid
+                  for group_struct in grp.getgrall()
+                  if user_struct.pw_name in group_struct.gr_mem]
+        groups.append(user_struct.pw_gid)
+        os.setgroups(groups)
         os.setgid(gid)
         os.setuid(uid)
     except Exception, exc: