mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
104 lines
3.3 KiB
Groff
104 lines
3.3 KiB
Groff
.\" Copyright (c) 1995
|
|
.\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by Bill Paul.
|
|
.\" 4. Neither the name of the author nor the names of any co-contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 12, 1995
|
|
.Dt ETHERS 5
|
|
.Os
|
|
.Sh NAME
|
|
.Nm ethers
|
|
.Nd ethernet address database
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
database contains information regarding known 48-bit ethernet addresses
|
|
of hosts on an Internetwork.
|
|
The data is stored in a file called
|
|
.Pa /etc/ethers
|
|
in the following format:
|
|
.Bd -unfilled -offset indent
|
|
.Pa ethernet-address fully-qualified-host-name
|
|
.Ed
|
|
.Pp
|
|
Items are separated by any number of blanks and/or
|
|
tab characters.
|
|
A ``#'' at the start of a line indicates the
|
|
beginning of a comment that extends to the end of the line.
|
|
A ``+'' at
|
|
the start of a line will cause the
|
|
.Xr ethers 3
|
|
library functions to use data stored in the
|
|
.Xr NIS 4
|
|
.Pa ethers.byname
|
|
and
|
|
.Pa ethers.byaddr
|
|
maps in addition to the data in the
|
|
.Pa /etc/ethers
|
|
file.
|
|
.Pp
|
|
An ethernet address is expressed in
|
|
.Tn ASCII
|
|
form as "x:x:x:x:x:x" where
|
|
.Ar x
|
|
is a hexadecimal value between 0x00 and 0xFF.
|
|
The address values
|
|
should be in network order.
|
|
Hostnames specified in the
|
|
.Pa /etc/ethers
|
|
database should correspond to entries in the
|
|
.Xr hosts 5
|
|
file.
|
|
.Pp
|
|
The
|
|
.Fn ether_line
|
|
function in the standard C library can be used to break individual
|
|
lines in the
|
|
.Pa /etc/ethers
|
|
database into their individual components: a binary Ethernet address
|
|
stored as an
|
|
.Pa ether_addr
|
|
structure, and a hostname stored as a character string.
|
|
.Sh FILES
|
|
.Bl -tag -width /etc/services -compact
|
|
.It Pa /etc/ethers
|
|
The
|
|
.Nm
|
|
file resides in
|
|
.Pa /etc .
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr ethers 3 ,
|
|
.Xr yp 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
format is based on the format used in SunOS 4.1.x.
|