posix_seteuid Set the effective UID of the current process &reftitle.description; boolposix_seteuid intuid Set the real user ID of the current process. This is a privileged function and needs appropriate privileges (usually root) on the system to be able to perform this function. &reftitle.parameters; uid The user id. &reftitle.returnvalues; &return.success; &reftitle.seealso; posix_setgid