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NAME

        sonar - display a sonar scope
 

SYNOPSIS

        sonar [-ping hosts-or-subnets] [-background color] [-sweep-color color]
        [-low-color   color]   [-scope-color   color]    [-grid-color    color]
        [-text-color  color]  [-ttl  integer]  [-font font] [-ping-timeout int]
        [-team-a-name string] [-team-b-name string] [-team-a-count int] [-team-
        b-count int] [-no-dns] [-no-times] [-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  dis‐
        plays  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 network
        ping function that pings hosts and plots the results on the scope.
 

OPTIONS

        sonar 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 values 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 subnet: e.g.,  sub     
                            net/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
 
        -no-dns Do not attempt to resolve IP addresses to hostnames.
 
        -no-times
                Do not display ping times beneath the host names.
 
        -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 setting 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 sim‐
                ulation-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 sonar
 
        In  ping-mode,  the  display is a logarithmic scale, calibrated so that
        the three rings represent ping times of approximately 2.5, 70 and 2,000
        milliseconds respectively.
 
        This  means  that  if  any the hosts you are pinging take longer than 2
        seconds to respond, they won’t show up; and if you are pinging  several
        hosts  with very fast response times, they will all appear close to the
        center of the screen (making their names hard to read.)
ping(8)
 

COPYRIGHT

        Copyright © 1998 by Stephen Martin.  <smartin@canada.com>  Copyright  ©
        2000-2004 by Jamie Zawinski <jwz@jwz.org>
 
        Permission to use, copy, modify, distribute, and sell this software and
        its documentation for any purpose is hereby granted without  fee,  pro‐
        vided  that  the  above  copyright notice appear in all copies and that
        both that copyright notice and this permission notice  appear  in  sup‐
        porting documentation.  No representations are made about the suitabil‐
        ity of this software for any purpose.  It is provided "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
        among 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.
 

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