diff --git a/pym/cl_utils.py b/pym/cl_utils.py
index 3251ea4..1ffc955 100644
--- a/pym/cl_utils.py
+++ b/pym/cl_utils.py
@@ -151,35 +151,44 @@ class scanDirectory:
 class process:
     """Execute system command by Popen
     
-    Example:
-    #execute program and get result
+    Examples:
+    
+    execute program and get result:
     if process("/bin/gzip","/boot/somefile").success():
         print "Gzip success"
 
-    #unzip and process unzip data by cpio (list files)
+    unzip and process unzip data by cpio (list files):
     processGzip = process("/bin/gzip","-dc","/boot/initrd")
     processCpio = process("/bin/cpio","-tf",stdin=processGzip)
     filelist = processCpio.readlines()
 
-    #execute command and send data
+    execute command and send data:
     processGrub = process("/sbin/grub")
     processGrub.write("root (hd0,0)\n")
     processGrub.write("setup (hd0)\n")
     processGrub.write("quit\n")
     isok = processGrub.success()
 
-    #union stdout and stderr
+    union stdout and stderr:
     process("/bin/ls","/",stderr=STDOUT)
+    
+    result to stdout:
+    process("/bin/ls",stdout=None)
+
+    get data from keyboard:
+    process("/bin/cat",stdin=None)
     """
     def __init__(self,command,*params,**kwarg):
         if not "stdin" in kwarg:
             stdin=self._defaultStdin
         else:
-            stdin=kwarg["stdin"].getStdout
-        if not "stdout" in kwarg:
-            self.stdout=PIPE
-        else:
-            self.stdout=kwarg["stdout"]
+            if kwarg["stdin"] == None:
+                stdin = self._keyboardStdin
+            else:
+                stdin=kwarg["stdin"].getStdout
+        self.stdout = kwarg.get("stdout",PIPE)
+        self.envdict = kwarg.get("envdict",None)
+
         self.stderr = kwarg.get("stderr",PIPE)
         self.command = [command] + list(params)
         self.stdin = stdin
@@ -194,12 +203,17 @@ class process:
             self.pipe = Popen(self.command,
                               stdout=self.stdout,
                               stdin=self.stdin(),
-                              stderr=self.stderr)
+                              stderr=self.stderr,
+                              env=self.envdict)
 
     def _defaultStdin(self):
         """Return default stdin"""
         return PIPE
 
+    def _keyboardStdin(self):
+        """Return keyboard stdin"""
+        return None
+
     def getStdout(self):
         """Get current stdout"""
         self.close()