Applying this to the 2.1.1 branch:

Fix SF bug #433904 (Alex Martelli) - all s_* methods return None only.

Lib/rexec.py

diff --git a/Lib/rexec.py b/Lib/rexec.py
index 6a7c207..cb397ce 100644
--- a/Lib/rexec.py
+++ b/Lib/rexec.py
@@ -332,24 +332,25 @@
                 r = apply(func, args)
         finally:
             self.restore_files()
+        return r
 
     def s_exec(self, *args):
-        self.s_apply(self.r_exec, args)
+        return self.s_apply(self.r_exec, args)
 
     def s_eval(self, *args):
-        self.s_apply(self.r_eval, args)
+        return self.s_apply(self.r_eval, args)
 
     def s_execfile(self, *args):
-        self.s_apply(self.r_execfile, args)
+        return self.s_apply(self.r_execfile, args)
 
     def s_import(self, *args):
-        self.s_apply(self.r_import, args)
+        return self.s_apply(self.r_import, args)
 
     def s_reload(self, *args):
-        self.s_apply(self.r_reload, args)
+        return self.s_apply(self.r_reload, args)
 
     def s_unload(self, *args):
-        self.s_apply(self.r_unload, args)
+        return self.s_apply(self.r_unload, args)
 
     # Restricted open(...)