fingerd - remote user information server
fingerd [-lMmpSsu] [-P filename]
fingerd is a simple protocol based on RFC 1288 that provides
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
fingerd is started by inetd(8), which listens for TCP requests at port
79. Once connected it reads a single command line terminated by a <CRLF>
which is passed to finger(1). fingerd closes its connections as soon as
the output is finished.
If the line is null (i.e., just a <CRLF> is sent) then finger(1) returns
a ``default'' report that lists all people logged into the
system at that
If a user name is specified (e.g., eric<CRLF>) then the response lists
more extended information for only that particular user,
in or not. Allowable ``names'' in the command line include
names'' and ``user names''. If a name is ambiguous, all
The following options may be passed to fingerd as server
-l Enable logging. The name of the host originating
the query and
the actual request is reported via syslog(3) at
A request of the form `/W' or `/w' will return
Empty requests will return all currently logged in
other requests look for specific users. See RFC
1288 for details.
-M Enables matching of user names. This is disabled by
the system is running YP.
-m Prevent matching of user names. User is usually a
however, matching will also be done on the users'
real names, unless
the -m option is supplied.
Use an alternate program as the local information
default local program executed by fingerd is finger(1). By specifying
a customized local server, this option allows
manager to have more control over what information
is provided to
-p Prevents finger(1) from displaying the contents of
and ``.project'' files.
-S Prints user information in short mode, one line per
overrides the ``Whois switch'' that may be passed in
from the remote
-s Enable secure mode. Forwarding of queries to other
-u Queries without a user name are rejected.
The fingerd command appeared in 4.3BSD.
Connecting directly to the server from a TIP or an equally
TELNET-protocol user program can result in meaningless attempts at option
negotiation being sent to the server, which will foul up the
interpretation. fingerd should be taught to filter out
IAC's and perhaps
even respond negatively (IAC WON'T) to all option commands
OpenBSD 3.6 June 4, 1993
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