4.3BSD - /usr/man/cat2/geteuid.0

GETUID(2)                                                            GETUID(2)


NAME
       getuid, geteuid - get user identity

SYNOPSIS
       #include <sys/types.h>

       uid = getuid()
       uid_t uid;

       euid = geteuid()
       uid_t euid;

DESCRIPTION
       Getuid  returns  the  real  user ID of the current process, geteuid the
       effective user ID.

       The real user ID identifies the person who is logged in.  The effective
       user  ID  gives  the process additional permissions during execution of
       “set-user-ID” mode processes, which use getuid to determine  the  real-
       user-id of the process that invoked them.

SEE ALSO
       getgid(2), setreuid(2)


4th Berkeley Distribution       January 7, 1986                      GETUID(2)