create_config.exp

#!/usr/bin/expect

# An expect script to automate the creation of the config file for noip2.

if {$argc != 4} {
  send_error "\nERROR: Pass arguments <email> <password> <domains or group> <interval>.\n"
  exit 1
}

set email [lindex $argv 0]
set password [lindex $argv 1]
# This can be a single domain name, a comma-delimited list, or a group name
set domains [split [lindex $argv 2] ","]
set interval [lindex $argv 3]

set config_file "/config/no-ip2.generated.conf"

spawn /files/noip2-x86_64 -C -c $config_file

expect "Please enter the login/email string for no-ip.com"
send "$email\r"

expect "Please enter the password for user"
send "$password\r"

set number_updated 0

expect {
  timeout { send_user "\nERROR: Timed out looking for host information\n"; exit 1 }

  eof { send_user "\nERROR: Hit EOF looking for host information\n"; exit 1 }

  # The case where there are no registered domains
  "No hosts are available for this user" {
      send_error "\nERROR: No domains registered to the account ($domains).\n"
      send_error "Please visit the No-Ip website and create one.\n"
      exit 2
  }

  # If there is only one group or host, verify that it's the one we want to update
  -re "Only one (.*) \\\[(.*)\\\] is registered to this account" {
    if {[llength $domains] != 1} {
      send_error "\nThere is only one registered host or group, but more than one was provided to be updated.\n"
      exit 2
    } elseif {$expect_out(2,string) != [lindex $domains 0]} {
      send_error "\nERROR: $expect_out(1,string) registered to the account ($expect_out(2,string)) does not match expected value ($domains).\n"
      send_error "Check your local config file and No-Ip website config.\n"
      send_error "If $domains is a host name, then remove the group in the No-Ip website, or change to use the group here.\n"
      exit 1
    } else {
      send_user "\nThere is only one registered $expect_out(1,string), and it is the expected one\n"
      incr number_updated
    }
  }

  # If there are multiple hosts and groups, then we need to loop over them
  "Do you wish to have them all updated?" {
    send "n"

    # Start looking for a matching host or group
    expect {
      timeout { send_user "\nERROR: Timed out processing registered hosts and groups one-by-one\n"; exit 1 }

      eof { send_user "\nERROR: Hit EOF processing hosts and groups one-by-one\n"; exit 1 }

      -re "Do you wish to have .* \\\[(.*)\\\] updated" {
        # Matching group found, so answer "y"
        if {[lsearch $domains $expect_out(1,string)] != -1} {
          send "y"
          incr number_updated
          exp_continue
        # Not a match, so answer "n"
        } else {
          send "n"
          exp_continue
        }
      }

      # If we don't find a match, exit. Check for errors afterward
      "Nothing selected" { }

      # If we do find a match, the noip2 will prompt for the update interval
      "Please enter an update interval" { }
    }
  }
}

if {[llength $domains] != $number_updated} {
  send_error "\n[llength $domains] hosts or groups were supposed to be updated, but only $number_updated were found\n"
  exit 2
}

send "$interval\r"

expect "Do you wish to run something at successful update"
send "n"

send_user "\nFinished creating config file\n"

close