1.\" $OpenBSD: setgroups.2,v 1.7 2000/04/15 11:46:04 aaron Exp $ 2.\" $NetBSD: setgroups.2,v 1.7 1995/02/27 12:36:49 cgd Exp $ 3.\" 4.\" Copyright (c) 1983, 1991, 1993, 1994 5.\" The Regents of the University of California. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by the University of 18.\" California, Berkeley and its contributors. 19.\" 4. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)setgroups.2 8.2 (Berkeley) 4/16/94 36.\" 37.Dd April 16, 1994 38.Dt SETGROUPS 2 39.Os 40.Sh NAME 41.Nm setgroups 42.Nd set group access list 43.Sh SYNOPSIS 44.Fd #include <sys/types.h> 45.Fd #include <unistd.h> 46.Ft int 47.Fn setgroups "int ngroups" "const gid_t *gidset" 48.Sh DESCRIPTION 49.Fn setgroups 50sets the group access list of the current user process 51according to the array 52.Fa gidset . 53The parameter 54.Fa ngroups 55indicates the number of entries in the array and must be no 56more than 57.Dv {NGROUPS_MAX} . 58.Pp 59Only the superuser may set new groups. 60.Sh RETURN VALUES 61A 0 value is returned on success, \-1 on error, with 62an error code stored in 63.Va errno . 64.Sh ERRORS 65The 66.Fn setgroups 67call will fail if: 68.Bl -tag -width Er 69.It Bq Er EINVAL 70The value of 71.Fa ngroups 72is greater than 73.Dv {NGROUPS_MAX} . 74.It Bq Er EPERM 75The caller is not the superuser. 76.It Bq Er EFAULT 77The address specified for 78.Fa gidset 79is outside the process 80address space. 81.El 82.Sh SEE ALSO 83.Xr getgroups 2 , 84.Xr initgroups 3 85.Sh HISTORY 86The 87.Fn setgroups 88function call appeared in 89.Bx 4.2 . 90