diff -Narup kvm-autotest/client/tests/kvm/kvm_preprocessing.py kvm-autotest-new/client/tests/kvm/kvm_preprocessing.py
--- kvm-autotest/client/tests/kvm/kvm_preprocessing.py	2009-07-08 08:31:01.492284501 +0200
+++ kvm-autotest-new/client/tests/kvm/kvm_preprocessing.py	2009-07-10 13:18:35.407285172 +0200
@@ -229,7 +229,8 @@ def preprocess(test, params, env):
 
     #execute any pre_commands
     if params.get("pre_command"):
-        process_command(test, params, env, params.get("pre_command"),
+        process_command(test, params, env, 
+                        (params.get("pre_command") + " true"),
                         params.get("pre_command_timeout"),
                         params.get("pre_command_noncritical"))
 
@@ -287,7 +288,8 @@ def postprocess(test, params, env):
 
     #execute any post_commands
     if params.get("post_command"):
-        process_command(test, params, env, params.get("post_command"),
+        process_command(test, params, env,
+                        (params.get("post_command") + " true"),
                         params.get("post_command_timeout"),
                         params.get("post_command_noncritical"))