Cisco Config Extract with Expect. From: http://pandaeatsbamboo.blogspot.com/2009/12/script-to-backup-cisco-device-config.html

Cisco Config Extract

#!/usr/bin/expect

set timeout 5 
log_user 1

# Include your hosts in the hostlist 
set hostlist "rt01 rt02 sw01 sw02" 
foreach host $hostlist { 
set prompt [append $host "#"] 
spawn telnet $host 
expect $prompt 
send "term len 0\r" 
expect $prompt 
set time [exec date \+\%y\%m\%dT\%H\%MJ] 
set filename [append host "-" $time]

# The config file storage location 
log_file /home/pandaeatsbamboo/cfgbackup/$filename 
send "show run\r" 
expect $prompt 
send "exit\r" 
log_file 
}