1.\" Copyright (c) 1992, 1993 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.\" @(#)netgroup.5 8.2 (Berkeley) 12/11/93 33.\" 34.Dd December 11, 1993 35.Dt NETGROUP 5 36.Os 37.Sh NAME 38.Nm netgroup 39.Nd defines network groups 40.Sh SYNOPSIS 41.Nm netgroup 42.Sh DESCRIPTION 43The 44.Nm netgroup 45file 46specifies ``netgroups'', which 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 58where the 59.Sy host , 60.Sy user , 61and 62.Sy domain 63are character string names for the corresponding component. 64Any of the comma separated fields may be empty to specify a ``wildcard'' value 65or may consist of the string ``-'' to specify ``no valid value''. 66The members of the list may be separated by whitespace and/or commas; 67the ``\e'' character may be used at the end of a line to specify 68line continuation. 69The functions specified in 70.Xr getnetgrent 3 71should normally be used to access the 72.Nm netgroup 73database. 74.Pp 75Lines that begin with a # are treated as comments. 76.Sh FILES 77.Bl -tag -width /etc/netgroup -compact 78.It Pa /etc/netgroup 79the netgroup database. 80.El 81.Sh SEE ALSO 82.Xr getnetgrent 3 , 83.Xr exports 5 84.Sh COMPATIBILITY 85The file format is compatible with that of various vendors, however it 86appears that not all vendors use an identical format. 87.Sh BUGS 88The interpretation of access restrictions based on the member tuples of a 89netgroup is left up to the various network applications. 90Also, it is not obvious how the domain specification 91applies to the BSD environment. 92