posix_geteuid Return the effective user ID of the current process &reftitle.description; intposix_geteuid Return the numeric effective user ID of the current process. See also posix_getpwuid for information on how to convert this into a useable username. &reftitle.returnvalues; Returns the user id, as an integer &reftitle.examples; This example will show the current user id then set the effective user id to a separate id using posix_seteuid, then show the difference between the real id and the effective id. ]]> &reftitle.seealso; posix_getpwuid posix_getuid posix_setuid POSIX man page GETEUID(2)