.\" Copyright (c) 1980 The Regents of the University of California. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms are permitted provided .\" that: (1) source distributions retain this entire copyright notice and .\" comment, and (2) distributions including binaries display the following .\" acknowledgement: ``This product includes software developed by the .\" University of California, Berkeley and its contributors'' in the .\" documentation or other materials provided with the distribution and in .\" all advertising materials mentioning features or use of this software. .\" Neither the name of the University nor the names of its contributors may .\" be used to endorse or promote products derived from this software without .\" specific prior written permission. .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. .\" .\" @(#)setreuid.2 6.3 (Berkeley) 6/23/90 .\" .TH SETREUID 2 "June 23, 1990" .UC 4 .SH NAME setreuid \- set real and effective user ID's .SH SYNOPSIS .ft B .nf setreuid(ruid, euid) int ruid, euid; .fi .ft R .SH DESCRIPTION The real and effective user ID's of the current process are set according to the arguments. If .I ruid or .I euid is \-1, the current uid is filled in by the system. Unprivileged users may change the real user ID to the effective user ID and vice-versa; only the super-user may make other changes. .SH "RETURN VALUE Upon successful completion, a value of 0 is returned. Otherwise, a value of \-1 is returned and \fIerrno\fP is set to indicate the error. .SH "ERRORS .TP 15 [EPERM] The current process is not the super-user and a change other than changing the effective user-id to the real user-id was specified. .SH "SEE ALSO" getuid(2), setregid(2), setuid(3)