1.\" $NetBSD: netgroup.5,v 1.6 1999/01/16 14:16:42 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 ``netgroups'', which are sets of 49.Sy (host, user, domain) 50tuples that are to be given similar network access. 51.Pp 52Each line in the file 53consists of a netgroup name followed by a list of the members of the 54netgroup. 55Each member can be either the name of another netgroup or a specification 56of a tuple as follows: 57.Bd -literal -offset indent 58(host, user, domain) 59.Ed 60.Pp 61where the 62.Sy host , 63.Sy user , 64and 65.Sy domain 66are character string names for the corresponding component. 67Any of the comma separated fields may be empty to specify a ``wildcard'' value 68or may consist of the string ``-'' to specify ``no valid value''. 69The members of the list may be separated by whitespace; 70the ``\e'' character may be used at the end of a line to specify 71line continuation. 72The functions specified in 73.Xr getnetgrent 3 74should normally be used to access the 75.Nm netgroup 76database. 77.Pp 78If 79.Sq files 80is specified for the 81.Sq netgroup 82database in 83.Xr nsswitch.conf 5 , 84(or no 85.Sq netgroup 86entry is specified), then these functions operate on the 87.Xr db 3 88version of the 89.Nm netgroup 90.Nm (netgroup.db) 91file which can be generated using 92.Xr netgroup_mkdb 8 . 93If 94.Sq nis 95is specified then the 96.Tn NIS 97maps 98.Sq netgroup , 99.Sq netgroup.byhost , 100and 101.Sq netgroup.byuser 102are used. 103.Pp 104Lines that begin with a # are treated as comments. 105.Sh FILES 106.Bl -tag -width /etc/netgroup.db -compact 107.It Pa /etc/netgroup.db 108the netgroup database. 109.El 110.Sh SEE ALSO 111.Xr getnetgrent 3 , 112.Xr exports 5 , 113.Xr nsswitch.conf 5 , 114.Xr netgroup_mkdb 8 115.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 BUGS 119The interpretation of access restrictions based on the member tuples of a 120netgroup is left up to the various network applications. 121