Derived from ALT's xscreensaver-5.05-alt2.patch

diff -pruN xscreensaver-5.05.orig/driver/exec.c xscreensaver-5.05/driver/exec.c
--- xscreensaver-5.05.orig/driver/exec.c	2006-02-04 00:36:33.000000000 -0700
+++ xscreensaver-5.05/driver/exec.c	2008-05-23 08:23:04.000000000 -0600
@@ -85,6 +85,7 @@ static void nice_process (int nice_level
 
 
 #ifndef VMS
+extern int __libc_enable_secure = 0;
 
 static void
 exec_simple_command (const char *command)
@@ -99,6 +100,9 @@ exec_simple_command (const char *command
     }
   av[ac] = 0;
 
+  setgid(getgid());
+  setuid(getuid());
+  __libc_enable_secure = 0;
   execvp (av[0], av);	/* shouldn't return. */
 }
 
diff -pruN xscreensaver-5.05.orig/driver/setuid.c xscreensaver-5.05/driver/setuid.c
--- xscreensaver-5.05.orig/driver/setuid.c	2006-02-08 19:33:29.000000000 -0700
+++ xscreensaver-5.05/driver/setuid.c	2008-05-23 08:23:46.000000000 -0600
@@ -140,9 +140,11 @@ set_ids_by_number (uid_t uid, gid_t gid,
       setgroups (1, &gid) < 0)
     sgs_errno = errno ? errno : -1;
 
+#if 0
   errno = 0;
   if (setgid (gid) != 0)
     gid_errno = errno ? errno : -1;
+#endif
 
   errno = 0;
   if (setuid (uid) != 0)
@@ -260,7 +262,7 @@ hack_uid (saver_info *si)
 
     si->orig_uid = strdup (uid_gid_string (euid, egid));
 
-    if (uid != euid || gid != egid)
+    if (euid == (uid_t) 0 && (uid != euid || gid != egid))
       if (set_ids_by_number (uid, gid, &si->uid_message) != 0)
 	saver_exit (si, 1, 0);
   }