Giving input to background processes

Question

Is there any way to give input to background processes or which run as daemon processes?

I was coding some Puppet configuration files and I had to push them to some remote machine. For that purpose I used git.

So I created a bare repository on that remote machine and used a git hook which would update the file after each push. So to update in /etc/puppet of the server machine I need to authenticate as root of that machine... But git essentially does this transfer through SSH (in the background ).

I tried to use /bin/expect to provide username and password for root of the remote machine but it didn't work.

Answer 1

Although this doesn't exactly answer the question you asked, you presented us with an XY Problem.

The answer to your real problem is to set up SSH keys.

• On the client side run ssh-keygen as the user who will be performing the operation.
• Copy the contents of id_rsa.pub to ~/.ssh/authorized_keys on the server.
• Make sure ~/.ssh/ is mode 0700 on the server.

You will no longer need to enter a password to connect.