#!/usr/bin/expect -f
 
set timeout 20
 
# router user name
set name "admin"
 
# router password
set pass "12345"
 
# router IP address
set routerip "192.168.1.1"
 
# Read command as arg to this script
set routercmd [lindex $argv 0]
 
# start telnet
spawn telnet $routerip
 
# send username & password
expect "Login:"
send -- "$name\r"
expect "Password:"
send -- "$pass\r"
 
# get out of ISP's  Stupid menu program, go to shell
expect " -> "
send --  "sh\r"
 
# execute command
expect "# "
send -- "$routercmd\r"
# exit
send -- "^D"