JoinDomain.exp

#!/usr/bin/expect

set timeout 10

set domain [lindex $argv 0]

set username [lindex $argv 1]

set password [lindex $argv 2] 

if {[llength $argv] == 0} {
  send_user "Usage: JoinDomain.exp 'domain' 'username' 'password'\n"
  exit 1
} 

spawn realm join --user=$username@$domain $domain

expect {
  timeout { send_user "\nFailed to get the password prompt\n"; exit 1}
  eof { send_user "\nFailed to join to the domain $domain with username $username and password $password\n"}
  "*assword" { send "$password\r"}
}

expect {
  timeout { send_user "Didn't get a response within the timeout period after putting in the password"; exit 1}
  "Couldn't join realm" { send_user "Failed to join to the domain\n"; exit 1}
}

send_user "Successfully joined to the domain\n"