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up vote 3 down vote favorite

I have this script:

cd /usr/local/src/
wget http://www.no-ip.com/client/linux/noip-duc-linux.tar.gz
tar xf noip-duc-linux.tar.gz
cd noip-2.1.9-1/
make install <<END_SCRIPT
Username
password
30
N
END_SCRIPT

According to this guide it should install Noip DUC (I'm using Ubuntu 14.04, go to the section for Ubuntu 12.04 LTS). When it gets to make install part, I tried to configure it so it would automatically enter all need information ("username", "password", "update interval", and "do you wish to run something after install (Y/N)?").

The install goes fine until I get to the configuration part. This is the last line of the output:

Enter-username Enter-password-for-Username _

(underscore is the cursor)

The program then just hangs ther and accepts no input.

This is how it looks like when you do it manually (more or less, I didn't copy preset printed strings to the letter):

Enter-username Username
Enter-password-for-Username password
Enter-interval 30
Question(Y/N)? N

Install done

Now, I know the Username was entered properly because it prints it out when requesting password. However, when it comes to the password part, it just hangs there. Any ideas?

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You can try to do this using expect - I think it will be easier. ref.: oreilly.com/catalog/expect/chapter/ch03.html –  alacerda Sep 8 '14 at 19:15

1 Answer 1

up vote 2 down vote accepted

The expect program is designed exactly for this situation. To use it with the noip client, adjust your script like:

#!/usr/bin/bash

cd /usr/local/src
wget http://www.no-ip.com/client/linux/noip-duc-linux.tar.gz
tar xf noip-duc-linux.tar.gz
cd noip-2.1.9-1/

/usr/bin/expect <<END_SCRIPT
spawn make install
expect "Please enter the login/email*" { send "Username\r" }
expect "Please enter the password for user*" { send "password\r" }
expect "Please enter an update interval*" { send "30\r" }
expect "Do you wish to run something at successful update*" {send "N\r" }
END_SCRIPT
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