Sonar(1)Sonar(1)NAMEsonar - display a sonar scope
SYNOPSISsonar [-ping hosts-or-subnets] [-background color]
[-sweep-color color] [-low-color color] [-scope-color
color] [-grid-color color] [-text-color color] [-ttl inte_
ger] [-font font] [-ping-timeout int] [-team-a-name
string] [-team-b-name string] [-team-a-count int] [-team-
b-count int] [-debug]
DESCRIPTION
The sonar program displays a sonar scope on the computer's
screen. This scope polls a sensor as the sweep goes
around the scope and displays what it finds as bogies on
the screen. The program is designed to support different
modes representing different types of sensors. Currently
the only implemented sensors are a simulator, and a net
work ping function that pings hosts and plots the results
on the scope.
OPTIONSsonar understands the following options:
-background Color
The background Color of the screen not covered by
the scope.
-sweep-color Color
The color of the brightest part of the sweep.
-scope-color Color
The color of the circular part of the scope.
-grid-color Color
The color to the grid lines overlaying the scope.
-text-color Color
The color of the text identifying bogies on the
scope.
-ttl integer
"Time to live": visible time of a Bogie. Try val
ues between 10 (very short) and 100.
-font font
The font used to display text on the scope.
Default "fixed".
-ping-timeout int
The amount of time in milliseconds the program
will wait for an answer to a ping.
-ping hosts-or-subnets
The list of things to ping, separated by commas or
spaces. Elements of this list may be:
simulation to run in simulation mode, instead of
pinging real hosts (this is the
default if the program is not
installed setuid);
hostname to ping the given host;
A.B.C.D to ping the given IP address;
subnet to ping the local class C subnet (the
nearest 255 addresses);
subnet/NN to ping a different-sized local sub
net: e.g., subnet/28 would ping a
4-bit subnet (the nearest 15
addresses);
A.B.C.D/NN to ping an arbitrary other subnet: the
IP address specifies the base address,
and the part after the slash is how
wide the subnet is. Typical values
are /24 (for 255 addresses) and /28
(for 15 addresses.)
filename to ping the hosts listed in the given
file. This file can be in the format
used by /etc/hosts, or it can be any
file that has host names as the first
element on each line. If you use ssh,
try this:
sonar-ping $HOME/.ssh/known_hosts
-team-a-name string
In simulation mode, the name of team A.
-team-b-name string
In simulation mode, the name of team B.
-team-a-count int
In simulation mode, the number of bogies on team
A.
-team-b-count int
In simulation mode, the number of bogies on team
B.
RESOURCES
Configuration of the targets to ping is best done by set
ting X Resources.
background (Color)
See option -background, above; default value is
black.
sweepColor (Color)
See option -sweep-color, above; default value is
#00ff00.
scopeColor (Color)
See option -scope-color, above; default value is
#003300.
gridColor (Color)
See option -grid-color, above; default value is
#00aa00.
textColor (Color)
See option -text-color, above; default value is
#ffff00.
ttl (integer)
See option -ttl, above; default value is 90 or one
sweep.
ping (string)
See option -ping, above. If set to default, it
will ping the contents of /etc/hosts if possible,
otherwise, will run in simulation-mode.
font (font)
See option -font, above; default value is fixed.
pingTimeout (Integer)
See option -pingtimeout, above; default value is
3000.
teamAName string
See option -team-a-name, above. Default value is
F18.
teamBName string
See option -teamBName, above. Default value is
MIG.
teamACount int
See option -teamACount, above. Default value is
4.
teamBCount int
See option -teamBCount, above. Default value is
4.
NOTES
In order to use the ping sensor, this program must be
installed as setuid root, so that it can create an ICMP
socket. Root privileges are disavowed shortly after
startup (just after connecting to the X server and reading
the resource database) so this is believed to be a safe
thing to do, but it is usually recommended that you have
as few setuid programs around as possible, on general
principles.
chown root.root sonar
chmod u+s sonarSEE ALSOX(1), xscreensaver(1), ping(8)COPYRIGHT
Copyright 1998 by Stephen Martin. (smartin@canada.com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby
granted without fee, provided that the above copyright
notice appear in all copies and that both that copyright
notice and this permission notice appear in supporting
documentation. No representations are made about the
suitability of this software for any purpose. It is pro
vided "as is" without express or implied warranty.
AUTHORS
Stephen Martin <smartin@canada.com>, 3-nov-98.
Thanks to Tom Kelly for suggesting a modular approach to
the sensor amoung other things.
Thomas Bahls <thommy@cs.tu-berlin.de> hacked the "ttl"
option, 12-jul-98.
Better subnet support and command-line processing by Jamie
Zawinski, 17-Jul-00.
X Version 11 3-Nov-98 Sonar(1)
