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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
+.TH "SETEUID" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" seteuid
+.SH NAME
+seteuid \- set effective user ID
+.SH SYNOPSIS
+.LP
+\fB#include <unistd.h>
+.br
+.sp
+int seteuid(uid_t\fP \fIuid\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+If \fIuid\fP is equal to the real user ID or the saved set-user-ID,
+or if the process has appropriate privileges,
+\fIseteuid\fP() shall set the effective user ID of the calling process
+to \fIuid\fP; the real user ID and saved set-user-ID shall
+remain unchanged.
+.LP
+The \fIseteuid\fP() function shall not affect the supplementary group
+list in any way.
+.SH RETURN VALUE
+.LP
+Upon successful completion, 0 shall be returned; otherwise, -1 shall
+be returned and \fIerrno\fP set to indicate the error.
+.SH ERRORS
+.LP
+The \fIseteuid\fP() function shall fail if:
+.TP 7
+.B EINVAL
+The value of the \fIuid\fP argument is invalid and is not supported
+by the implementation.
+.TP 7
+.B EPERM
+The process does not have appropriate privileges and \fIuid\fP does
+not match the real group ID or the saved
+set-group-ID.
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+None.
+.SH RATIONALE
+.LP
+Refer to the RATIONALE section in \fIsetuid\fP() .
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIexec\fP() , \fIgetegid\fP() , \fIgeteuid\fP() , \fIgetgid\fP()
+, \fIgetuid\fP() ,
+\fIsetegid\fP() , \fIsetgid\fP() , \fIsetregid\fP() , \fIsetreuid\fP()
+, \fIsetuid\fP() ,
+the Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<sys/types.h>\fP,
+\fI<unistd.h>\fP
+.SH 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 .