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+.\" Copyright (c) 1983, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)setruid.3	8.1 (Berkeley) 6/2/93
+.\" $FreeBSD$
+.\"
+.Dd June 2, 1993
+.Dt SETRUID 3
+.Os
+.Sh NAME
+.Nm setruid ,
+.Nm setrgid
+.Nd set user and group ID
+.Sh LIBRARY
+.Lb libc
+.Sh SYNOPSIS
+.In unistd.h
+.Ft int
+.Fn setruid "uid_t ruid"
+.Ft int
+.Fn setrgid "gid_t rgid"
+.Sh DESCRIPTION
+The
+.Fn setruid
+function
+.Pq Fn setrgid
+sets the real user ID (group ID) of the
+current process.
+.Sh RETURN VALUES
+.Rv -std
+.Sh COMPATIBILITY
+The use of these calls is not portable.
+Their use is discouraged; they will be removed in the future.
+.Sh ERRORS
+The functions fail if:
+.Bl -tag -width Er
+.It Bq Er EPERM
+The user is not the super user and the ID
+specified is not the real or effective ID.
+.El
+.Sh SEE ALSO
+.Xr getgid 2 ,
+.Xr getuid 2 ,
+.Xr setegid 2 ,
+.Xr seteuid 2 ,
+.Xr setgid 2 ,
+.Xr setuid 2
+.Sh HISTORY
+The
+.Fn setruid
+and
+.Fn setrgid
+syscalls appeared in
+.Bx 4.2
+and were dropped in
+.Bx 4.4 .