104 lines
3.3 KiB
Groff
104 lines
3.3 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)services.5 8.1 (Berkeley) 6/5/93
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.\" $FreeBSD$
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.\"
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.Dd April 4, 2010
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.Dt SERVICES 5
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.Os
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.Sh NAME
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.Nm services
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.Nd service name data base
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.Sh DESCRIPTION
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The
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.Nm
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file contains information regarding
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the known services available in the
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Internet.
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For each service a single line should be present
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with the following information:
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.Bd -unfilled -offset indent
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official service name
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port number
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protocol name
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aliases
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.Ed
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.Pp
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Items are separated by any number of blanks and/or tab characters.
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The port number and protocol name are considered a single
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.Em item ;
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a ``/'' is used to
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separate the port and protocol (e.g.\& ``512/tcp'').
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A ``#'' indicates the beginning of
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a comment; subsequent characters up to the end of the line are
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not interpreted by the routines which search the file.
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.Pp
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Service names may contain any printable
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character other than a field delimiter, newline,
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or comment character.
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.Pp
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If
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.Dq db
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is specified as source in the
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.Xr nsswitch.conf 5 ,
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.Pa /var/db/services.db
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is searched.
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The database in
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.Pa /var/db/services.db
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needs to be updated with
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.Xr services_mkdb 8
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after changes to the services file have been applied.
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.Sh NIS INTERACTION
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Access to the NIS
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.Pa services.byname
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map can be enabled by adding a single ``+'' on a line by itself
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in the
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.Pa /etc/services
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file.
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This causes the contents of the NIS services map to be inserted
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at the location where the ``+'' appears.
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.Sh FILES
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.Bl -tag -width /etc/services -compact
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.It Pa /etc/services
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The
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.Nm
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file resides in
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.Pa /etc .
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.El
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.Sh SEE ALSO
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.Xr getservent 3 ,
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.Xr nsswitch.conf 5 ,
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.Xr services_mkdb 8
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.Sh HISTORY
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The
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.Nm
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file format appeared in
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.Bx 4.2 .
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.Sh BUGS
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A name server should be used instead of a static file.
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