| 1 | .\" Copyright (c) 1980 Regents of the University of California.
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| 2 | .\" All rights reserved. The Berkeley software License Agreement
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| 3 | .\" specifies the terms and conditions for redistribution.
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| 4 | .\"
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| 5 | .\" @(#)fingerd.8c 6.1 (Berkeley) 5/23/86
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| 6 | .\"
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| 7 | .TH FINGERD 8 "May 23, 1986"
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| 8 | .UC 6
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| 9 | .SH NAME
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| 10 | fingerd, in.fingerd \- remote user information server
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| 11 | .SH SYNOPSIS
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| 12 | .B "finger stream tcp nowait nobody /usr/sbin/in.fingerd in.fingerd"
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| 13 | .br
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| 14 | .B "tcpd finger /usr/sbin/in.fingerd in.fingerd"
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| 15 | .SH DESCRIPTION
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| 16 | .B Fingerd
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| 17 | is a simple protocol based on RFC742 that provides an interface to the
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| 18 | Name and Finger programs at several network sites.
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| 19 | The program is supposed to return a friendly,
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| 20 | human-oriented status report on either the system at the moment
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| 21 | or a particular person in depth.
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| 22 | There is no required format and the
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| 23 | protocol consists mostly of specifying a single ``command line''.
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| 24 | .PP
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| 25 | .B Fingerd
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| 26 | listens for TCP requests at port 79.
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| 27 | Once connected it reads a single command line
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| 28 | terminated by a <CRLF> which is passed to
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| 29 | .BR finger (1).
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| 30 | .B Fingerd
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| 31 | closes its connections as soon as the output is finished.
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| 32 | .PP
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| 33 | If the line is null (i.e. just a <CRLF> is sent) then
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| 34 | .B finger
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| 35 | returns a ``default'' report that lists all people logged into
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| 36 | the system at that moment.
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| 37 | .PP
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| 38 | If a user name is specified (e.g. eric<CRLF>) then the
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| 39 | response lists more extended information for only that particular user,
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| 40 | whether logged in or not.
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| 41 | Allowable ``names'' in the command line include both ``login names''
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| 42 | and ``user names''.
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| 43 | If a name is ambiguous, all possible derivations are returned.
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| 44 | .SH SEE ALSO
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| 45 | .BR finger (1).
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| 46 | .SH BUGS
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| 47 | Connecting directly to the server from a TIP
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| 48 | or an equally narrow-minded TELNET-protocol user program can result
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| 49 | in meaningless attempts at option negotiation being sent to the
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| 50 | server, which will foul up the command line interpretation.
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| 51 | .B Fingerd
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| 52 | should be taught to filter out IAC's and perhaps even respond
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| 53 | negatively (IAC WON'T) to all option commands received.
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