hallo guys,

I've got one short question to you.

My task is to run a shell script with temporarily given user rights of the owner. Normally I thought of just setting the s-bit by chmod, but apparently this does not work as I thought it did.
I neither do have reading or writing access to any file apart from those where the rights have been set for other users.

Any ideas how to make them readable?

You could use sudo to either user or, if access given, wheel group to perform actions.
Ofcourse this would be a hassle with 10+ users, plus sudo is strict on what to access.
Else you could (have admin) put a script into their crontab or in a system users one with sufficient access. Ofcourse the users' crontab would only run when they're in. A system users crontab would call for a separate user with access to /home/users or wherever them users is at and is IMO the best option, but maybe you could elaborate a bit on what you're tryin to do? Thatll clear things up on what's possible or not.