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FINGERD.8
Upload User: jnzhq888
Upload Date: 2007-01-18
Package Size: 51694k
Code Size: 2k
Category:
OS Develop
Development Platform:
WINDOWS
- ." Copyright (c) 1980 Regents of the University of California.
- ." All rights reserved. The Berkeley software License Agreement
- ." specifies the terms and conditions for redistribution.
- ."
- ." @(#)fingerd.8c 6.1 (Berkeley) 5/23/86
- ."
- .TH FINGERD 8 "May 23, 1986"
- .UC 6
- .SH NAME
- fingerd, in.fingerd - remote user information server
- .SH SYNOPSIS
- .B "finger stream tcp nowait nobody /usr/sbin/in.fingerd in.fingerd"
- .br
- .B "tcpd finger /usr/sbin/in.fingerd in.fingerd"
- .SH DESCRIPTION
- .B Fingerd
- is a simple protocol based on RFC742 that provides an interface to the
- Name and Finger programs at several network sites.
- The program is supposed to return a friendly,
- human-oriented status report on either the system at the moment
- or a particular person in depth.
- There is no required format and the
- protocol consists mostly of specifying a single ``command line''.
- .PP
- .B Fingerd
- listens for TCP requests at port 79.
- Once connected it reads a single command line
- terminated by a <CRLF> which is passed to
- .BR finger (1).
- .B Fingerd
- closes its connections as soon as the output is finished.
- .PP
- If the line is null (i.e. just a <CRLF> is sent) then
- .B finger
- returns a ``default'' report that lists all people logged into
- the system at that moment.
- .PP
- If a user name is specified (e.g. eric<CRLF>) then the
- response lists more extended information for only that particular user,
- whether logged in or not.
- Allowable ``names'' in the command line include both ``login names''
- and ``user names''.
- If a name is ambiguous, all possible derivations are returned.
- .SH SEE ALSO
- .BR finger (1).
- .SH BUGS
- Connecting directly to the server from a TIP
- or an equally narrow-minded TELNET-protocol user program can result
- in meaningless attempts at option negotiation being sent to the
- server, which will foul up the command line interpretation.
- .B Fingerd
- should be taught to filter out IAC's and perhaps even respond
- negatively (IAC WON'T) to all option commands received.