1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)setruid.3 8.1 (Berkeley) 6/2/93 33.\" $FreeBSD: src/lib/libc/compat-43/setruid.3,v 1.5.2.5 2001/12/14 18:33:49 ru Exp $ 34.\" $DragonFly: src/lib/libc/compat-43/setruid.3,v 1.3 2006/02/17 19:35:06 swildner Exp $ 35.\" 36.Dd June 2, 1993 37.Dt SETRUID 3 38.Os 39.Sh NAME 40.Nm setruid , 41.Nm setrgid 42.Nd set user and group ID 43.Sh LIBRARY 44.Lb libc 45.Sh SYNOPSIS 46.In unistd.h 47.Ft int 48.Fn setruid "uid_t ruid" 49.Ft int 50.Fn setrgid "gid_t rgid" 51.Sh DESCRIPTION 52The 53.Fn setruid 54function 55.Pq Fn setrgid 56sets the real user ID (group ID) of the 57current process. 58.Sh RETURN VALUES 59.Rv -std 60.Sh COMPATIBILITY 61The use of these calls is not portable. 62Their use is discouraged; they will be removed in the future. 63.Sh ERRORS 64The functions fail if: 65.Bl -tag -width Er 66.It Bq Er EPERM 67The user is not the super user and the ID 68specified is not the real or effective ID. 69.El 70.Sh SEE ALSO 71.Xr getgid 2 , 72.Xr getuid 2 , 73.Xr setegid 2 , 74.Xr seteuid 2 , 75.Xr setgid 2 , 76.Xr setuid 2 77.Sh HISTORY 78The 79.Fn setruid 80and 81.Fn setrgid 82syscalls appeared in 83.Bx 4.2 84and were dropped in 85.Bx 4.4 . 86