topic Script with different user in Operating System - Linux

Script with different user

simon_164 — Sat, 05 Aug 2006 12:05:11 GMT

I am searching for a script that will run a command under a different user. which means i want the script to do an su - prdadm and then to run the script /usr/.../stopsap and then to exit. how to do this? does it exist, by the way i want to use it for a sap system with data protector.

Re: Script with different user

Ivan Ferreira — Sat, 05 Aug 2006 12:25:57 GMT

You can install and use SUDO. Once you installed, you can enable users to run commands in behalf other users. For exammple:

# visudo

dpuser ALL = (prdadm) NOPASSWD: /usr/../stopsap

Then, dpuser can run:

sudo -u prdadm -H /usr/../stopsap. In this way, the dpuser will run the script as prdadm

Re: Script with different user

KapilRaj — Sat, 05 Aug 2006 13:02:36 GMT

su - -c "/path/to/the/script/script>"

Re: Script with different user

DCE — Sat, 05 Aug 2006 14:22:15 GMT

If you are doing it from the root id:
su - prdadm -c "/usr/.../stopsap

If you want to do it from another id, the you will have to use sudo

Re: Script with different user

simon_164 — Sat, 05 Aug 2006 14:53:07 GMT

This is not what i am looking for, since i want to log in to the user prdadm because of the paths and variables, i tried the
su - prdadm -c '...' but it always hangs before the user logs in and i need to press enter so that it will enter and do its job.

Re: Script with different user

A. Clay Stephenson — Sun, 06 Aug 2006 20:00:40 GMT

Your problem is the "su - prdadm -c ..." rather than simply "su prdadm -c ...". I know that you want to setup the environemt by sourcing prdadm's .profile but that very .profile has commands like tset, tput, tabs, ... that expect stdin to be a terminal-like device --- which it ain't in this case. There are 2 approaches:

1) Surround all of these commands in .profile with:
if [ -t 0 ]
then
tput ..
tabs ..
fi
2) better:
Create a file that sets and exports any needed environment variables e.g. /usr/local/bin/prdadm_env.sh
and let both your su'ed script AND prdadm's .profile source this file using the "." dot operator.

e.g. . /usr/local/bin/prdadm_env.sh

This sourced file should not contain any exit or return statement because this file becomes part of the foreground process rather than a child process.

Re: Script with different user

Dennis Handly — Mon, 07 Aug 2006 16:58:40 GMT

>I tried the su - prdadm -c '...' but it always hangs before the user logs in and I need to press enter

Can you redirect stdin to /dev/null so it won't bother reading?

Re: Script with different user

simon_164 — Tue, 08 Aug 2006 04:52:07 GMT

The problem was with the user login and i correct it.