1.\" $NetBSD: fingerd.8,v 1.22 2016/12/24 05:40:49 abhinav Exp $ 2.\" 3.\" Copyright (c) 1980, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" from: @(#)fingerd.8 8.1 (Berkeley) 6/4/93 31.\" 32.Dd September 12, 2002 33.Dt FINGERD 8 34.Os 35.Sh NAME 36.Nm fingerd 37.Nd remote user information server 38.Sh SYNOPSIS 39.Nm 40.Op Fl 8ghlmpSsu 41.Op Fl P Ar filename 42.Sh DESCRIPTION 43.Nm 44is a simple protocol based on RFC 1288 45that provides an interface to the 46.Xr finger 1 47program at several network sites. 48The program is supposed to return a friendly, 49human-oriented status report on either the system at the moment 50or a particular person in depth. 51There is no required format and the 52protocol consists mostly of specifying a single 53.Dq command line . 54.Pp 55.Nm 56is started by 57.Xr inetd 8 , 58which listens for 59.Tn TCP 60requests at port 79. 61Once handed a connection, 62.Nm 63reads a single command line 64terminated by a 65.Aq Tn CRLF 66which it then passes to 67.Xr finger 1 . 68.Nm 69closes its connections as soon as the output is finished. 70.Pp 71If the line is null (i.e., just a 72.Aq Tn CRLF 73is sent) then 74.Xr finger 1 75returns a 76.Dq default 77report that lists all people logged into 78the system at that moment. 79.Pp 80If a user name is specified (e.g., 81.Pf eric Aq Tn CRLF ) 82then the 83response lists more extended information for only that particular user, 84whether logged in or not. 85Allowable 86.Dq names 87in the command line include both 88.Dq login names 89and 90.Dq user names . 91If a name is ambiguous, all possible derivations are returned. 92.Pp 93The following options may be passed to 94.Nm 95as server program arguments in 96.Pa /etc/inetd.conf : 97.Bl -tag -width XPXfilenameX 98.It Fl 8 99Enable 8-bit output. 100.It Fl g 101Do not show any gecos information besides the users' real names. 102.It Fl h 103Display the name of the remote host in short mode, 104instead of the office location and office phone. 105.It Fl l 106Enable logging. 107The name of the host originating the query, and the actual request 108is reported via 109.Xr syslog 3 110at LOG_NOTICE priority. 111A request of the form 112.Sq /W 113or 114.Sq /w 115will return long output. 116Empty requests will return all currently logged in users. 117All other requests look for specific users. 118See RFC 1288 for details. 119.It Fl m 120Prevent matching of 121.Ar user 122names. 123.Ar User 124is usually a login name; however, matching will also be done on the 125users' real names, unless the 126.Fl m 127option is supplied. 128.It Fl P Ar filename 129Use an alternate program as the local information provider. 130The default local program executed by 131.Nm 132is 133.Xr finger 1 . 134By specifying a customized local server, this option allows a system manager 135to have more control over what information is provided to remote sites. 136.It Fl p 137Prevents 138.Xr finger 1 139from displaying the contents of the 140.Dq Pa .plan 141and 142.Dq Pa .project 143files. 144.It Fl S 145Prints user information in short mode, one line per user. 146This overrides the 147.Dq Pa Whois switch 148that may be passed in from the remote client. 149.It Fl s 150Disable forwarding of queries to other remote hosts. 151.It Fl u 152Queries without a user name are rejected. 153.El 154.Sh SEE ALSO 155.Xr finger 1 , 156.Xr inetd 8 157.Sh HISTORY 158The 159.Nm 160command appeared in 161.Bx 4.3 . 162.Sh BUGS 163Connecting directly to the server from a 164.Tn TIP 165or an equally narrow-minded 166.Tn TELNET Ns -protocol 167user program can result 168in meaningless attempts at option negotiation being sent to the 169server, which will foul up the command line interpretation. 170.Nm 171should be taught to filter out 172.Tn IAC Ns 's 173and perhaps even respond 174negatively 175.Pq Tn IAC WON'T 176to all option commands received. 177