AvengerMoJo's Blog

Expect SSH

When you need to automate some interactive console action, expect and autoexpect are the tools you need. Here is an example how to generate a ssh login test and run some simple command.

#!/usr/bin/expect --

# TestSSH.exp



set USER guest

set HOST localhost

set LOOP 10

set COMMAND "echo "test">>/tmp/testme

"





while {$LOOP > 0} {

        if [fork]!=0  {

                eval spawn ssh $USER@$HOST

                set pid $spawn_id



                expect {

                   "(yes/no)?" { send "yes

"; exp_continue}

                   "^Password" { send "guest

"; exp_continue }

                   "*>*" { send $COMMAND }

                }



                expect "*>*"

                exit

        } else {

                set LOOP [expr $LOOP-1]

        }

}



exit

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