A feature whereby a program automatically changes its access rights to assume new privileges.
A special file access mode that sets the effective UID of the user account executing a program to the UID of the program owner. The setuid permission has an absolute mode of 4000 and a symbolic mode of s.
A system call that can be used to set the UID of a process. Programs can be written using setuid such that they can assume the user ID of any process on the system. This is considered a possible security problem if a program is "setuid root."