1.\" Copyright (c) 1983, 1991, 1993, 1994 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. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)setgroups.2 8.2 (Berkeley) 4/16/94 29.\" $FreeBSD: src/lib/libc/sys/setgroups.2,v 1.4.2.4 2001/12/14 18:34:01 ru Exp $ 30.\" $DragonFly: src/lib/libc/sys/setgroups.2,v 1.3 2006/05/26 19:39:37 swildner Exp $ 31.\" 32.Dd April 16, 1994 33.Dt SETGROUPS 2 34.Os 35.Sh NAME 36.Nm setgroups 37.Nd set group access list 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In sys/param.h 42.In unistd.h 43.Ft int 44.Fn setgroups "int ngroups" "const gid_t *gidset" 45.Sh DESCRIPTION 46.Fn Setgroups 47sets the group access list of the current user process 48according to the array 49.Fa gidset . 50The parameter 51.Fa ngroups 52indicates the number of entries in the array and must be no 53more than 54.Dv NGROUPS , 55as defined in 56.In sys/param.h . 57.Pp 58Only the super-user may set new groups. 59.Sh RETURN VALUES 60.Rv -std setgroups 61.Sh ERRORS 62The 63.Fn setgroups 64call will fail if: 65.Bl -tag -width Er 66.It Bq Er EPERM 67The caller is not the super-user. 68.It Bq Er EFAULT 69The address specified for 70.Fa gidset 71is outside the process 72address space. 73.El 74.Sh SEE ALSO 75.Xr getgroups 2 , 76.Xr initgroups 3 77.Sh HISTORY 78The 79.Fn setgroups 80function call appeared in 81.Bx 4.2 . 82