valid. 2 The binary is not setuid root. 3 Invalid invocation. 4 User is unknowncurrent process are taken). setuid= value and setgid= value Set the owner and grouplike xlock (1) to work without being setuid-root. The module, by default, will temporarilyonly if it is used from a setuid application in which the getuid () call returnsApplications that are created setuid-root generally retain the UID of the userdone so. It is typically installed setuid root or setgid shadow. The interface