NAME

       getuid - get a real user ID

SYNOPSIS

       #include <unistd.h>

       uid_t getuid(void);

DESCRIPTION

       The getuid() function shall return the real user ID of the calling process.

RETURN VALUE

       The  getuid()  function  shall  always  be  successful  and no return value is reserved to
       indicate the error.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

   Setting the Effective User ID to the Real User ID
       The following example sets the effective user ID and the  real  user  ID  of  the  current
       process to the real user ID of the caller.

              #include <unistd.h>
              #include <sys/types.h>
              ...
              setreuid(getuid(), getuid());
              ...

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       getegid()  ,  geteuid()  ,  getgid()  ,  setegid()  ,  seteuid() , setgid() , setregid() ,
       setreuid()  ,  setuid()  ,  the   Base   Definitions   volume   of   IEEE Std 1003.1-2001,
       <sys/types.h>, <unistd.h>

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .