userid - UNIX for Advanced & Expert Users

sundaresh · #1 08-17-2007

I would like to know the difference between the real user-id and the
effective user-id. If user-A runs a program owned by user-B then
which is the real user-id and which is the effective user-id ?

Perderabo · #2 08-17-2007

If user-A runs a program that has the suid bit set, owned by user-B, the process will start with a real uid of user-A and an effective uid of user B.

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