how to simulte keyboard input from a bash script

jmling · 10-24-2007, 03:18 PM

Hi,

I was writing a bash script which will sudo a normal user to a super user. I donot want to manually enter the password, instead, I want to pass passwork within bash script itself. I've tried to search a lot, but still failed, could some one here to help me out? Thanks a lot in advance!

My scripting is as below:
******************************
#!/bin/bash
echo 'about to sue dough'
sudo su - ebba
< "password"
echo 'this did it'
********************************

Thanks,
Junmin

larkl · 10-24-2007, 06:34 PM

You might look at Expect http://expect.nist.gov/. I got it to work in a bash script where I needed to embed a password.

custangro · 10-24-2007, 06:48 PM

This is how I did it...assumeing my UID is 500...

First edit the /etc/sudoers file and add the following:

Code:

username        ALL=(ALL)       NOPASSWD: ALL

Where username is the username of the user you want to have sudo access

Then the script would look something like this...

Code:

#!/bin/bash
#
# Only username can use this script
if [ $(id -u) -ne 500 ] ; then
  echo "You are not allowed to use this command"
  exit
fi
# Now sudo into root with out password...
sudo su -
eixt

Replace the 500 with whatever the users uid is...

-Custangro

jmling · 10-24-2007, 07:17 PM

Thanks, Custangro!

I think you solution will definitely work, but unfortunately, I donot have permission to modify /etc/sudoers file. You have any other suggestions to embed password within script itself?

-Junmin