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. 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.\" @(#)setgroups.2 8.2 (Berkeley) 4/16/94 33.\" $FreeBSD$ 34.\" 35.Dd April 16, 1994 36.Dt SETGROUPS 2 37.Os 38.Sh NAME 39.Nm setgroups 40.Nd set group access list 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In sys/param.h 45.In unistd.h 46.Ft int 47.Fn setgroups "int ngroups" "const gid_t *gidset" 48.Sh DESCRIPTION 49The 50.Fn setgroups 51system call 52sets the group access list of the current user process 53according to the array 54.Fa gidset . 55The 56.Fa ngroups 57argument 58indicates the number of entries in the array and must be no 59more than 60.Dv NGROUPS , 61as defined in 62.In sys/param.h . 63.Pp 64Only the super-user may set new groups. 65.Sh RETURN VALUES 66.Rv -std setgroups 67.Sh ERRORS 68The 69.Fn setgroups 70system call will fail if: 71.Bl -tag -width Er 72.It Bq Er EPERM 73The caller is not the super-user. 74.It Bq Er EINVAL 75The number specified in the 76.Fa ngroups 77argument is larger than the 78.Dv NGROUPS 79limit. 80.It Bq Er EFAULT 81The address specified for 82.Fa gidset 83is outside the process 84address space. 85.El 86.Sh SEE ALSO 87.Xr getgroups 2 , 88.Xr initgroups 3 89.Sh HISTORY 90The 91.Fn setgroups 92system call appeared in 93.Bx 4.2 . 94