GETUID(2)                        System Calls                        GETUID(2)

NAME

       getuid, geteuid - get user identification

SYNOPSIS

       #include <sys/types.h>
       #include <unistd.h>

       uid_t getuid(void);
       uid_t geteuid(void);

DESCRIPTION

       The  getuid  function  returns the real user ID of the calling process.
       The geteuid function returns the  effective  user  ID  of  the  calling
       process.

       The  real  user ID is that of the user who has invoked the program.  As
       the effective user ID gives the process additional  permissions  during
       execution  of  set-user-ID  mode processes, getuid is used to determine
       the real-user-id of the calling process.

ERRORS

       The getuid and geteuid functions are always successful, and  no  return
       value is reserved to indicate an error.

SEE ALSO

       getgid(2), setreuid(2)

STANDARDS

       Geteuid and getuid conform to IEEE Std 1003.1-1988 (POSIX).



GNO                             16 January 1997                      GETUID(2)