1.\" $NetBSD: netgroup.5,v 1.9 2014/09/19 16:02:58 wiz 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. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)netgroup.5 8.2 (Berkeley) 12/11/93 31.\" 32.Dd January 16, 1999 33.Dt NETGROUP 5 34.Os 35.Sh NAME 36.Nm netgroup 37.Nd defines network groups 38.Sh SYNOPSIS 39.Nm netgroup 40.Sh DESCRIPTION 41The 42.Nm netgroup 43file 44specifies 45.Dq netgroups , 46which are sets of 47.Sy (host, user, domain) 48tuples that are to be given similar network access. 49.Pp 50Each line in the file 51consists of a netgroup name followed by a list of the members of the 52netgroup. 53Each member can be either the name of another netgroup or a specification 54of a tuple as follows: 55.Bd -literal -offset indent 56(host, user, domain) 57.Ed 58.Pp 59where the 60.Sy host , 61.Sy user , 62and 63.Sy domain 64are character string names for the corresponding component. 65Any of the comma separated fields may be empty to specify a 66.Dq wildcard 67value 68or may consist of the string 69.Dq Li - 70to specify 71.Dq no valid value . 72The members of the list may be separated by whitespace; 73the 74.Dq \e 75character may be used at the end of a line to specify 76line continuation. 77The functions specified in 78.Xr getnetgrent 3 79should normally be used to access the 80.Nm netgroup 81database. 82.Pp 83If 84.Sq files 85is specified for the 86.Sq netgroup 87database in 88.Xr nsswitch.conf 5 , 89(or no 90.Sq netgroup 91entry is specified), then these functions operate on the 92.Xr db 3 93version of the 94.Nm netgroup 95.Nm (netgroup.db) 96file which can be generated using 97.Xr netgroup_mkdb 8 . 98If 99.Sq nis 100is specified then the 101.Tn NIS 102maps 103.Sq netgroup , 104.Sq netgroup.byhost , 105and 106.Sq netgroup.byuser 107are used. 108.Pp 109Lines that begin with a # are treated as comments. 110.Sh FILES 111.Bl -tag -width /etc/netgroup.db -compact 112.It Pa /etc/netgroup.db 113the netgroup database. 114.El 115.Sh COMPATIBILITY 116The file format is compatible with that of various vendors, however it 117appears that not all vendors use an identical format. 118.Sh SEE ALSO 119.Xr getnetgrent 3 , 120.Xr exports 5 , 121.Xr nsswitch.conf 5 , 122.Xr netgroup_mkdb 8 123.Sh BUGS 124The interpretation of access restrictions based on the member tuples of a 125netgroup is left up to the various network applications. 126