su pass password to script

Question

I am trying to write a script that will run the following commands:

sudo su
runmqsc_result=`su -c \"runmqsc QMGR < /home/rob/query_queue.txt\" -m \"mqm\"`         


        

Answer 1

From man sudo:

-S    The -S (stdin) option causes sudo to read the password from the standard
      input instead of the terminal device.  The password must be followed by a
      newline character.

So, while it defies all security principles, echo 'password' | sudo -S su [...] should work.

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Alternatively, you could make your script writeable only by root and add the following to /etc/sudoers to allow the user johndoe to run it with root priviledges without having to enter his password:

johndoe ALL = NOPASSWD: /full/path/to/your/script

The part writeable only by root is important to prevent johndoe from modifying the script and executing arbitrary commands as root.