1.\" Copyright (c) 1983, 1991, 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. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.Dd April 4, 2010 29.Dt SERVICES 5 30.Os 31.Sh NAME 32.Nm services 33.Nd service name data base 34.Sh DESCRIPTION 35The 36.Nm 37file contains information regarding 38the known services available in the 39Internet. 40For each service a single line should be present 41with the following information: 42.Bd -unfilled -offset indent 43official service name 44port number 45protocol name 46aliases 47.Ed 48.Pp 49Items are separated by any number of blanks and/or tab characters. 50The port number and protocol name are considered a single 51.Em item ; 52a ``/'' is used to 53separate the port and protocol (e.g.\& ``512/tcp''). 54A ``#'' indicates the beginning of 55a comment; subsequent characters up to the end of the line are 56not interpreted by the routines which search the file. 57.Pp 58Service names may contain any printable 59character other than a field delimiter, newline, 60or comment character. 61.Pp 62If 63.Dq db 64is specified as source in the 65.Xr nsswitch.conf 5 , 66.Pa /var/db/services.db 67is searched. 68The database in 69.Pa /var/db/services.db 70needs to be updated with 71.Xr services_mkdb 8 72after changes to the services file have been applied. 73.Sh NIS INTERACTION 74Access to the NIS 75.Pa services.byname 76map can be enabled by adding a single ``+'' on a line by itself 77in the 78.Pa /etc/services 79file. 80This causes the contents of the NIS services map to be inserted 81at the location where the ``+'' appears. 82.Sh FILES 83.Bl -tag -width /etc/services -compact 84.It Pa /etc/services 85The 86.Nm 87file resides in 88.Pa /etc . 89.El 90.Sh SEE ALSO 91.Xr getservent 3 , 92.Xr nsswitch.conf 5 , 93.Xr services_mkdb 8 94.Sh HISTORY 95The 96.Nm 97file format appeared in 98.Bx 4.2 . 99.Sh BUGS 100A name server should be used instead of a static file. 101