diff -Naur --exclude '*~' partimage-0.6.7/src/shared/privs.cpp partimage-0.6.7-set-effective-gid/src/shared/privs.cpp
--- partimage-0.6.7/src/shared/privs.cpp	2008-02-03 22:57:55.000000000 +0100
+++ partimage-0.6.7-set-effective-gid/src/shared/privs.cpp	2008-05-07 11:06:51.000000000 +0200
@@ -52,8 +52,10 @@
         {
           switched = true;
           user = password -> pw_uid;
+          group = password -> pw_gid;
           setuid(0);
           seteuid(user);              // we're now _user
+          setegid(group);              // we're now _user
         }
       else
         {
diff -Naur --exclude '*~' partimage-0.6.7/src/shared/privs.h partimage-0.6.7-set-effective-gid/src/shared/privs.h
--- partimage-0.6.7/src/shared/privs.h	2008-02-03 22:57:55.000000000 +0100
+++ partimage-0.6.7-set-effective-gid/src/shared/privs.h	2008-05-07 11:07:10.000000000 +0200
@@ -30,6 +30,7 @@
   bool AsSwitched() { return switched; }
 private:
   uid_t user;
+  gid_t group;
   bool switched;
 };