1.\" $NetBSD: setgroups.2,v 1.12 2002/02/08 01:28:22 ross Exp $ 2.\" 3.\" Copyright (c) 1983, 1991, 1993, 1994 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)setgroups.2 8.2 (Berkeley) 4/16/94 35.\" 36.Dd April 16, 1994 37.Dt SETGROUPS 2 38.Os 39.Sh NAME 40.Nm setgroups 41.Nd set group access list 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.Fd #include \*[Lt]sys/param.h\*[Gt] 46.Fd #include \*[Lt]unistd.h\*[Gt] 47.Ft int 48.Fn setgroups "int ngroups" "const gid_t *gidset" 49.Sh DESCRIPTION 50.Fn setgroups 51sets the group access list of the current user process 52according to the array 53.Fa gidset . 54The parameter 55.Fa ngroups 56indicates the number of entries in the array and must be no 57more than 58.Dv {NGROUPS_MAX} . 59.Pp 60Only the super-user may set new groups. 61.Sh RETURN VALUES 62A 0 value is returned on success, -1 on error, with 63an error code stored in 64.Va errno . 65.Sh ERRORS 66The 67.Fn setgroups 68call will fail if: 69.Bl -tag -width Er 70.It Bq Er EINVAL 71The value of 72.Fa ngroups 73is greater than 74.Dv {NGROUPS_MAX} . 75.It Bq Er EPERM 76The caller is not the super-user. 77.It Bq Er EFAULT 78The address specified for 79.Fa gidset 80is outside the process 81address space. 82.El 83.Sh SEE ALSO 84.Xr getgroups 2 , 85.Xr initgroups 3 86.Sh HISTORY 87The 88.Fn setgroups 89function call appeared in 90.Bx 4.2 . 91