1.\" $NetBSD: netgroup.5,v 1.7 2000/11/17 10:14:18 lukem Exp $ 2.\" 3.\" Copyright (c) 1992, 1993 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.\" @(#)netgroup.5 8.2 (Berkeley) 12/11/93 35.\" 36.Dd January 16, 1999 37.Dt NETGROUP 5 38.Os 39.Sh NAME 40.Nm netgroup 41.Nd defines network groups 42.Sh SYNOPSIS 43.Nm netgroup 44.Sh DESCRIPTION 45The 46.Nm netgroup 47file 48specifies 49.Dq netgroups , 50which are sets of 51.Sy (host, user, domain) 52tuples that are to be given similar network access. 53.Pp 54Each line in the file 55consists of a netgroup name followed by a list of the members of the 56netgroup. 57Each member can be either the name of another netgroup or a specification 58of a tuple as follows: 59.Bd -literal -offset indent 60(host, user, domain) 61.Ed 62.Pp 63where the 64.Sy host , 65.Sy user , 66and 67.Sy domain 68are character string names for the corresponding component. 69Any of the comma separated fields may be empty to specify a 70.Dq wildcard 71value 72or may consist of the string 73.Dq Li - 74to specify 75.Dq no valid value . 76The members of the list may be separated by whitespace; 77the 78.Dq \e 79character may be used at the end of a line to specify 80line continuation. 81The functions specified in 82.Xr getnetgrent 3 83should normally be used to access the 84.Nm netgroup 85database. 86.Pp 87If 88.Sq files 89is specified for the 90.Sq netgroup 91database in 92.Xr nsswitch.conf 5 , 93(or no 94.Sq netgroup 95entry is specified), then these functions operate on the 96.Xr db 3 97version of the 98.Nm netgroup 99.Nm (netgroup.db) 100file which can be generated using 101.Xr netgroup_mkdb 8 . 102If 103.Sq nis 104is specified then the 105.Tn NIS 106maps 107.Sq netgroup , 108.Sq netgroup.byhost , 109and 110.Sq netgroup.byuser 111are used. 112.Pp 113Lines that begin with a # are treated as comments. 114.Sh FILES 115.Bl -tag -width /etc/netgroup.db -compact 116.It Pa /etc/netgroup.db 117the netgroup database. 118.El 119.Sh SEE ALSO 120.Xr getnetgrent 3 , 121.Xr exports 5 , 122.Xr nsswitch.conf 5 , 123.Xr netgroup_mkdb 8 124.Sh COMPATIBILITY 125The file format is compatible with that of various vendors, however it 126appears that not all vendors use an identical format. 127.Sh BUGS 128The interpretation of access restrictions based on the member tuples of a 129netgroup is left up to the various network applications. 130