xref: /freebsd/libexec/fingerd/fingerd.8 (revision 6990ffd8a95caaba6858ad44ff1b3157d1efba8f)
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32.\"     @(#)fingerd.8	8.1 (Berkeley) 6/4/93
33.\" $FreeBSD$
34.\"
35.Dd June 4, 1993
36.Dt FINGERD 8
37.Os
38.Sh NAME
39.Nm fingerd
40.Nd remote user information server
41.Sh SYNOPSIS
42.Nm
43.Op Fl s
44.Op Fl l
45.Op Fl p Ar filename
46.Sh DESCRIPTION
47.Nm Fingerd
48is a simple protocol based on
49.%T RFC1196
50that provides an interface to the
51Name and Finger programs at several network sites.
52The program is supposed to return a friendly,
53human-oriented status report on either the system at the moment
54or a particular person in depth.
55There is no required format and the
56protocol consists mostly of specifying a single
57.Dq command line .
58.Pp
59.Nm Fingerd
60is started by
61.Xr inetd 8 ,
62which listens for
63.Tn TCP
64requests at port 79.
65Once connected it reads a single command line
66terminated by a
67.Aq Tn CRLF
68which is passed to
69.Xr finger 1 .
70.Nm Fingerd
71closes its connections as soon as the output is finished.
72.Pp
73If the line is null (i.e. just a
74.Aq Tn CRLF
75is sent) then
76.Xr finger
77returns a
78.Dq default
79report that lists all people logged into
80the system at that moment.
81.Pp
82If a user name is specified (e.g.\&
83.Pf eric Aq Tn CRLF )
84then the
85response lists more extended information for only that particular user,
86whether logged in or not.
87Allowable
88.Dq names
89in the command line include both
90.Dq login names
91and
92.Dq user names .
93If a name is ambiguous, all possible derivations are returned.
94.Pp
95The following options may be passed to
96.Nm
97as server program arguments in
98.Pa /etc/inetd.conf :
99.Bl -tag -width indent
100.It Fl s
101Enable secure mode.
102Queries without a user name are rejected and
103forwarding of queries to other remote hosts is denied.
104.It Fl l
105Enable logging.
106The name of the host originating the query is reported via
107.Xr syslog 3
108at LOG_NOTICE priority.
109.It Fl p
110Use an alternate program as the local information provider.
111The default local program
112executed by
113.Nm
114is
115.Xr finger 1 .
116By specifying a customized local server,
117this option allows a system manager
118to have more control over what information is
119provided to remote sites.
120.El
121.Sh SEE ALSO
122.Xr finger 1 ,
123.Xr inetd 8
124.Sh BUGS
125Connecting directly to the server from a
126.Tn TIP
127or an equally narrow-minded
128.Tn TELNET Ns \-protocol
129user program can result
130in meaningless attempts at option negotiation being sent to the
131server, which will foul up the command line interpretation.
132.Nm Fingerd
133should be taught to filter out
134.Tn IAC Ns \'s
135and perhaps even respond
136negatively
137.Pq Tn IAC WON'T
138to all option commands received.
139.Sh HISTORY
140The
141.Nm
142command appeared in
143.Bx 4.3 .
144