diff --git a/src/core/sat_main.py b/src/core/sat_main.py
index 88b664d1..0319e9ba 100644
--- a/src/core/sat_main.py
+++ b/src/core/sat_main.py
@@ -75,6 +75,13 @@ class SAT(service.Service):
 
     def get_const(self, name):
         """Return a constant"""
+        try:
+            _const = os.environ['SAT_CONST_%s' % name]
+            if _const:
+                debug(_("Constant %(name)s overrided with [%(value)s]") % {'name':name, 'value': _const})
+                return _const
+        except KeyError:
+            pass
         if not CONST.has_key(name):
             error(_('Trying to access an undefined constant'))
             raise Exception
diff --git a/src/sat.sh b/src/sat.sh
index 55d0f407..51601b9f 100755
--- a/src/sat.sh
+++ b/src/sat.sh
@@ -16,8 +16,14 @@ fi
 
 NAME='sat'
 
-PID_FILE="/tmp/$NAME.pid"
-LOG_FILE=~/".$NAME/$NAME.log"
+if [ -n "$SAT_CONST_local_dir" ];then
+	echo "Using overidded local dir: $SAT_CONST_local_dir"
+	PID_FILE="$SAT_CONST_local_dir/$NAME.pid"
+	LOG_FILE="$SAT_CONST_local_dir/$NAME.log"
+else
+	PID_FILE="/tmp/$NAME.pid"
+	LOG_FILE=~/".$NAME/$NAME.log"
+fi
 DAEMON="n"
 MAIN_OPTIONS="-${DAEMON}oy"
 TAP_PATH="./"