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Expect hangs!!!

Posted by naveenpn (naveenpn), 11 January 2009
Hi,
  I have script which is based on TCL and expect. It is written to test my code. It usually runs fine for a while and hangs after sometime.


  Code snippet

       set l_temp_timeout $timeout
       OUTPUT_LOG2 2 >>>$expect_out(buffer)<<<
       OUTPUT_LOG2 2 "Expecting...$my_prompt"
       set timeout 3
       
       expect  {
           $my_prompt { set l 1 }
           timeout  { OUTPUT_LOG2 2 $expect_out(buffer) }
       }
       OUTPUT_LOG2 2 "...Out of Expect $my_prompt"



  My log  for this code normally  looks like

Retrying...
>>>^M^M
238114.0^M
^Mswitch(config-if-hsrp)#<<<
Expecting...#
...Out of Expect #



  But once this hangs it looks like


Retrying...
>>>^M^M
704802.0^M
^Mswitch(config-if-hsrp)#<<<
Expecting...#

   
    Screen shot for this

^Mswitch(config-if-hsrp)# echo 704802.0^M
704802.0
^Mswitch(config-if-hsrp)# sh ip route vrf all^M
sh ip route vrf all

IP Route Table for VRF "default"
:
:
:
:
IP Route Table for VRF "cisco3"
'*' denotes best ucast next-hop       '**' denotes best mcast next-hop
'[x/y]' denotes [preference/metric]

0.0.0.0/32, 1 ucast next-hops, 0 mcast next-hops
  *via Null0, [220/0], 00:25:03, local, discard
255.255.255.255/32, 1 ucast next-hops, 0 mcast next-hops
  *via sup-eth1, [0/0], 00:25:03, local



 Even I noticed that the prompt did not come back. Not sure whats the problem. Even if the prompt which is "#" did not show up, at least it should have timed out.

 Why is it hanging ?


 Thanks
Naveen





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