[Regicide]

I'm running Koppix 3.4 (2.4.x kernel) on my laptop. Is there a way to have a script run only under a certain user? I'm trying to have a simple script execute the command: "pump -i ath0" only under a certain user. How would I go about doing this; if possible?

[tsunam]

the simpilist would be to change the permissions of the file to 700. That will make it so only the owner will be able to run it, others can't even read the file.

#chmod 700 (file)

edit: at least this should work, not sure about it working with the root account...not being able to run it though. It probably still can since root is just that powerful.

[Regicide]

Thanks for the info. Now, two more questions: how would I go about making a script run for every user except for one? Also, where should I put the script to have it run?

[Squashman]

Create a group with the users you want to run the script.
Create a folder and chown the folder with that group name. Put the script in their.

Now I am not sure if you can run the script based on what group they are in. You could try adding some checks in /etc/profile to see what group they are in and then run the script if they are. Otherwise you could just edit each users .bash_profile if that is what shell you are using.

[Regicide]

Ok, I'll try that later, thanks a lot!

[codejockey]

You might also consider using the id command in your script to identify the user attempting to run the script, and then either allow or deny execution. For example:

USERID=`id -ru`
if [ "$USERID" -eq 501 ]                        # allow only user with ID 501 to run script
then
    echo allowed to run script
else
    echo cannot run script
fi

if [ "$USERID" -ne 501 ]                        # allow any user other than 501
then
    echo allowed to run script
else
    echo cannot run script
fi

This has the advantage that you can change it easily (without creating/modifying groups and file permissions) and will also detect attempts to run the script with an effective ID that is different from the real ID.

Hope this helps.

[Squashman]

Another lesson learned from CodeJockey! Thanks.

[codejockey]

Subject line says it all. Glad I could contribute -- and for the record, I've gotten plenty of good advice/info from lots of folks here, including LwdSquashman ()

[tsunam]

have to admit codejockey has helped me out with coding stuff more then he knows.

I think my next project will be to create a screenshot program that uses a secure ftp/encrypted something.

Since the one I made now has the pass and user just in the script....course someone would have to steal my laptop and know my logins to find it but still...