1.\" Copyright (c) 1980, 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. All advertising materials mentioning features or use of this software
13.\" must display the following acknowledgement:
14.\" This product includes software developed by the University of
15.\" California, Berkeley and its contributors.
16.\" 4. Neither the name of the University nor the names of its contributors
17.\" may be used to endorse or promote products derived from this software
18.\" without specific prior written permission.
19.\"
20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\" @(#)fingerd.8 8.1 (Berkeley) 6/4/93
| 1.\" Copyright (c) 1980, 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. All advertising materials mentioning features or use of this software
13.\" must display the following acknowledgement:
14.\" This product includes software developed by the University of
15.\" California, Berkeley and its contributors.
16.\" 4. Neither the name of the University nor the names of its contributors
17.\" may be used to endorse or promote products derived from this software
18.\" without specific prior written permission.
19.\"
20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\" @(#)fingerd.8 8.1 (Berkeley) 6/4/93
|
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
| 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
|
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 .
| 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 .
|