SFLWLD
Section: User Commands (1)
Updated: 12 APR 1998
Index
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NAME
sflwld - Speak Freely Look Who's Listening server
SYNOPSIS
sflwld
[
-duv
]
[
-fserver,...
]
[
-hpath
]
[
-iinterval
]
[
-mmsgfile
]
[
-pport
]
[
-rinterval
]
[
-zpath
]
DESCRIPTION
sflwld
is a server daemon which maintains a list of users running Speak
Freely who identify themselves to the site running the server.
sflwld
responds to requests and supplies contact information to allow users
to find one another's Internet addresses.
sflwld
allows users to find one another and establish Speak Freely conversations
even if one or both have dial-up Internet connections where the host name
and Internet address vary from session to session.
Servers can forward information to one another,
allowing a user who queries one server in a
mutually-forwarding group to find users connected to any
server in the group.
OPTIONS
- -d
-
Enables debug output.
- -fserver,...
-
Information received from users directly connected to this
server will be forwarded to all servers listed. Server names
can be either numeric IP addresses or host names, and may
specify a port number appended to the server address or name, separated
by a colon. Multiple servers can be specified, separated by commas, up
to a maximum of 5.
- -hpath
-
An HTML file is written to the given
path
name (a fully qualified file name, less the
.html
suffix), listing all users currently registered with this server.
Publishing this HTML file as a World-Wide Web document on the server
allows easy access to a list of all active users who have sent
their information there.
- -iinterval
-
The HTML files written by the
-h
and
-z
options will be updated every
interval
seconds if a change has occurred during that period. If
interval
is set to zero, the files are updated at the moment of any change.
- -mmsgfile
-
The contents of the text file
msgfile
are loaded and used as the ``server welcome message''. This
message usually identifies the server and points to the
HTML file containing the list of active sites.
- -pport
-
Causes
sflwld
to listen on the specified port number instead of the default
port specified by ``INTERNET_PORT''+2 in the
Makefile.
Specifying a nonstandard port number will cause Speak Freely clients
that haven't been similarly reconfigured to fail to contact the server;
the main reason for using a nonstandard port number is to permit
testing an experimental server on a machine which is running a
production server.
- -rinterval
-
The HTML written by the
-h
and
-z
options will contain a client-pull request which causes the user's
Web browser (if it supports client-pull) to automatically
refresh the document every
interval
seconds. If no
-r
option is specified or
interval
is set to 0, no client-pull updating will occur. Note the
distinction between the
-i
and
-r
options;
-i
specifies how frequently
sflwld
updates the HTML file on the server, while the
-r
option determines the interval between automatic downloads
of this file to users displaying it in their Web browsers.
It doesn't make sense to set the
-r
option to a shorter
interval
than the
-i
option, but to reduce network traffic it may be eminently reasonable
to update the HTML file every 30 seconds or so, but only have users
refresh their browser display every two to five minutes.
- -u
-
Prints how-to-call information.
- -v
-
Causes
sflwld
to log all connections, disconnections, and timeouts to standard
output.
- -zpath
-
An HTML file is written to the given
path
name (a fully qualified file name, less the
.html
suffix), listing all users currently registered with this server,
regardless of whether they requested public disclosure of their
identity by wildcard match or not. This option allows the
system administrator to see all users communicating with the
server without making this information publicly available.
There's nothing to prevent a rogue site manager from publishing
the complete user list, but since a user can easily determine
whether a request for "exact match only" has been complied with,
circumspect users will shun sites which ignore their request for
discretion.
FILES
The
-h
and
-z
options create HTML files with the given base name and an
extension of
.new,
then swap the new files for any previously-existing files with
an extension of
.html.
The file update process avoids the risk of transferring a file
in the process of being written.
BUGS
The number of matching items returned is limited to what will
fit in a single 512 byte packet. This is deliberate; users who wish
to browse active sites should consult the HTML file published with
the
-h
option rather than tie up the server running
sflwld
with individual wild-card requests.
SEE ALSO
sflwl(1),
sfmike(1),
sfspeaker(1)
AUTHOR
-
John Walker
WWW: http://www.fourmilab.ch/
This program is in the public domain.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- FILES
-
- BUGS
-
- SEE ALSO
-
- AUTHOR
-
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Time: 12:37:46 GMT, July 10, 2022