I have written a code snippet in TCL expect to connect from Server 1 to Server 2 using ssh. Users already may have set passwordless communication between Server 1 and Server 2, or it may ask for a password. Code should handle all these three below possible scenarios:
- If passwordless login is enabled between Server 1 and Server 2
- No Passwordless login is enabled, Password: prompt is displayed
- If user enters incorrect Password, a second Password: prompt is expected where ctrl+c will be entered and will exit.
Please find below the code
#!/usr/bin/expect -f
lassign $argv 1 2
spawn ssh -o StrictHostKeyChecking=no $1@$2
expect {
"*]#" { send -- "sleep 0\n" } #Prompt when passwordless is active and user have logged in
"Password: " {send -- "$2\n" #Password prompt when no passwordless is active.
exp_continue }
"Password: " {send -- "^C" } # Second Password Prompt when the wrong password is entered
in previous step. From here code should exit with a message
}
expect "*]#" # After SSH is successful
I am not able to handle the second Password: prompt for an incorrect password where the code should exit with an appropriate message to the user. I am running the script ./testssh.exp username password.
