xref: /freebsd/share/man/man5/services.5 (revision 7aa383846770374466b1dcb2cefd71bde9acf463)
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32.\"     @(#)services.5	8.1 (Berkeley) 6/5/93
33.\" $FreeBSD$
34.\"
35.Dd April 4, 2010
36.Dt SERVICES 5
37.Os
38.Sh NAME
39.Nm services
40.Nd service name data base
41.Sh DESCRIPTION
42The
43.Nm
44file contains information regarding
45the known services available in the
46Internet.
47For each service a single line should be present
48with the following information:
49.Bd -unfilled -offset indent
50official service name
51port number
52protocol name
53aliases
54.Ed
55.Pp
56Items are separated by any number of blanks and/or tab characters.
57The port number and protocol name are considered a single
58.Em item ;
59a ``/'' is used to
60separate the port and protocol (e.g.\& ``512/tcp'').
61A ``#'' indicates the beginning of
62a comment; subsequent characters up to the end of the line are
63not interpreted by the routines which search the file.
64.Pp
65Service names may contain any printable
66character other than a field delimiter, newline,
67or comment character.
68.Pp
69If
70.Dq db
71is specified as source in the
72.Xr nsswitch.conf 5 ,
73.Pa /var/db/services.db
74is searched.
75The database in
76.Pa /var/db/services.db
77needs to be updated with
78.Xr services_mkdb 8
79after changes to the services file have been applied.
80.Sh NIS INTERACTION
81Access to the NIS
82.Pa services.byname
83map can be enabled by adding a single ``+'' on a line by itself
84in the
85.Pa /etc/services
86file.
87This causes the contents of the NIS services map to be inserted
88at the location where the ``+'' appears.
89.Sh FILES
90.Bl -tag -width /etc/services -compact
91.It Pa /etc/services
92The
93.Nm
94file resides in
95.Pa /etc .
96.El
97.Sh SEE ALSO
98.Xr getservent 3
99.Xr nsswitch.conf 5
100.Xr services_mkdb 8
101.Sh HISTORY
102The
103.Nm
104file format appeared in
105.Bx 4.2 .
106.Sh BUGS
107A name server should be used instead of a static file.
108