1.\" Copyright (c) 1980, 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" %sccs.include.redist.man% 5.\" 6.\" @(#)fingerd.8 6.4 (Berkeley) 03/16/91 7.\" 8.Dd 9.Dt FINGERD 8 10.Os BSD 4.3 11.Sh NAME 12.Nm fingerd 13.Nd remote user information server 14.Sh SYNOPSIS 15.Nm fingerd 16.Sh DESCRIPTION 17.Nm Fingerd 18is a simple protocol based on 19.%T RFC742 20that provides an interface to the 21Name and Finger programs at several network sites. 22The program is supposed to return a friendly, 23human-oriented status report on either the system at the moment 24or a particular person in depth. 25There is no required format and the 26protocol consists mostly of specifying a single 27.Dq command line . 28.Pp 29.Nm Fingerd 30listens for 31.Tn TCP 32requests at port 79. 33Once connected it reads a single command line 34terminated by a 35.Aq Tn CRLF 36which is passed to 37.Xr finger 1 . 38.Nm Fingerd 39closes its connections as soon as the output is finished. 40.Pp 41If the line is null (i.e. just a 42.Aq Tn CRLF 43is sent) then 44.Xr finger 45returns a 46.Dq default 47report that lists all people logged into 48the system at that moment. 49.Pp 50If a user name is specified (e.g. 51.Pf eric Aq Tn CRLF ) 52then the 53response lists more extended information for only that particular user, 54whether logged in or not. 55Allowable 56.Dq names 57in the command line include both 58.Dq login names 59and 60.Dq user names . 61If a name is ambiguous, all possible derivations are returned. 62.Sh SEE ALSO 63.Xr finger 1 64.Sh BUGS 65Connecting directly to the server from a 66.Tn TIP 67or an equally narrow-minded 68.Tn TELNET Ns \-protocol 69user program can result 70in meaningless attempts at option negotiation being sent to the 71server, which will foul up the command line interpretation. 72.Nm Fingerd 73should be taught to filter out 74.Tn IAC Ns \'s 75and perhaps even respond 76negatively 77.Pq Tn IAC WON'T 78to all option commands received. 79.Sh HISTORY 80The 81.Nm 82command appeared in 83.Bx 4.3 . 84