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SETEUID(P)			    POSIX Programmer's Manual			       SETEUID(P)

NAME
       seteuid - set effective user ID

SYNOPSIS
       #include <unistd.h>

       int seteuid(uid_t uid);

DESCRIPTION
       If uid is equal to the real user ID or the saved set-user-ID, or if the process has appro-
       priate privileges, seteuid() shall set the effective user ID of	the  calling  process  to
       uid; the real user ID and saved set-user-ID shall remain unchanged.

       The seteuid() function shall not affect the supplementary group list in any way.

RETURN VALUE
       Upon successful completion, 0 shall be returned; otherwise, -1 shall be returned and errno
       set to indicate the error.

ERRORS
       The seteuid() function shall fail if:

       EINVAL The value of the uid argument is invalid and is not supported  by  the  implementa-
	      tion.

       EPERM  The  process  does  not have appropriate privileges and uid does not match the real
	      group ID or the saved set-group-ID.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       Refer to the RATIONALE section in setuid() .

FUTURE DIRECTIONS
       None.

SEE ALSO
       exec() , getegid() , geteuid() , getgid() , getuid() , setegid() , 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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				       SETEUID(P)
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