Try a shell script such as:
#!/usr/bin/expect -f
spawn openvpn client.warriors.conf.open
match_max 100000
expect "*?assword:*"
send -- "mypassword"
send -- "\r"
expect eof
You'll need to chmod +x this, you can also set it as an environment variable so you don't have to type out the directory.
Looks like they got this script to work: https://unix.stackexchange.com/questions/9055/establish-openvpn-tunnel-in-bash-script
