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mention services_mkdb; from Thilo Jeremias

.\"	$NetBSD: services.5,v 1.9 2007/06/19 19:26:10 christos Exp $
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.\"     @(#)services.5	8.1 (Berkeley) 6/5/93
.\"
.Dd June 19, 2007
.Dt SERVICES 5
.Os
.Sh NAME
.Nm services
.Nd service name data base
.Sh DESCRIPTION
The
.Nm services
file contains information regarding
the known services available in the
.Tn DARPA
Internet.
For each service a single line should be present
with the following information:
.Bd -unfilled -offset indent
official service name
port number
protocol name
aliases
.Ed
.Pp
Items are separated by any number of blanks and/or
tab characters.  The port number and protocol name
are considered a single
.Em item ;
a slash
.Pq Dq /
is used to separate the port and protocol (e.g.
.Dq 512/tcp ) .
A hash
.Pq Dq \&#
indicates the beginning of
a comment; subsequent characters up to the end of the line are
not interpreted by the routines which search the file.
.Pp
Service names may contain any printable
character other than a field delimiter, newline,
or comment character.
.Pp
The database in /var/db/services.db 
needs to be updated with 
.Xr services_mkdb 8
after changes to the services file have been applied.
.Sh FILES
.Bl -tag -width /etc/services -compact
.It Pa /etc/services
The
.Nm services
file resides in
.Pa /etc .
.El
.Sh SEE ALSO
.Xr getservent 3
.Xr services_mkdb 8
.Sh HISTORY
The
.Nm
file format appeared in
.Bx 4.2 .
.Sh BUGS
A name server should be used instead of a static file.