version 4 showing authors affecting page license.
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perry |
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Sonar |
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!!!Sonar |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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OPTIONS |
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RESOURCES |
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NOTES |
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SEE ALSO |
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COPYRIGHT |
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AUTHORS |
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---- |
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!!NAME |
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sonar - display a sonar scope |
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!!SYNOPSIS |
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__sonar__ [[-ping ''hosts-or-subnets''] [[-background |
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''color''] [[-sweep-color ''color''] [[-low-color |
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''color''] [[-scope-color ''color''] [[-grid-color |
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''color''] [[-text-color ''color''] [[-ttl |
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''integer''] [[-font ''font''] [[-ping-timeout |
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''int''] [[-team-a-name ''string''] [[-team-b-name |
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''string''] [[-team-a-count ''int''] [[-team-b-count |
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''int''] [[-debug] |
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!!DESCRIPTION |
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The ''sonar'' program displays a sonar scope on the |
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computer's screen. This scope polls a sensor as the sweep |
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goes around the scope and displays what it finds as bogies |
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on the screen. The program is designed to support different |
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modes representing different types of sensors. Currently the |
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only implemented sensors are a simulator, and a network ping |
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function that pings hosts and plots the results on the |
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scope. |
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!!OPTIONS |
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''sonar'' understands the following options: |
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__-background__ ''Color'' |
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The background Color of the screen not covered by the |
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scope. |
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__-sweep-color__ ''Color'' |
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The color of the brightest part of the sweep. |
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__-scope-color__ ''Color'' |
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The color of the circular part of the scope. |
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__-grid-color__ ''Color'' |
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The color to the grid lines overlaying the |
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scope. |
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__-text-color__ ''Color'' |
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The color of the text identifying bogies on the |
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scope. |
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__-ttl__ ''integer'' |
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__-font__ ''font'' |
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The font used to display text on the scope. Default |
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__-ping-timeout__ ''int'' |
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The amount of time in milliseconds the program will wait for |
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an answer to a ping. |
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__-ping__ ''hosts-or-subnets'' |
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The list of things to ping, separated by commas or spaces. |
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Elements of this list may be: |
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__simulation__ |
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to run in simulation mode, instead of pinging real hosts |
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(this is the default if the program is not installed |
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setuid); |
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''hostname'' |
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to ping the given host; |
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''A.B.C.D'' |
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to ping the given IP address; |
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__subnet__ |
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to ping the local class C subnet (the nearest 255 |
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addresses); |
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__subnet/__''NN'' |
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to ping a different-sized local subnet: e.g., |
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__subnet/28__ would ping a 4-bit subnet (the nearest 15 |
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addresses); |
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''A.B.C.D/NN'' |
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to ping an arbitrary other subnet: the IP address specifies |
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the base address, and the part after the slash is how wide |
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the subnet is. Typical values are /24 (for 255 addresses) |
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and /28 (for 15 addresses.) |
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''filename'' |
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to ping the hosts listed in the given file. This file can be |
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in the format used by ''/etc/hosts'', or it can be any |
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file that has host names as the first element on each line. |
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If you use ssh, try this: |
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sonar -ping $HOME/.ssh/known_hosts |
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__-team-a-name__ ''string'' |
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In simulation mode, the name of team A. |
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__-team-b-name__ ''string'' |
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In simulation mode, the name of team B. |
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__-team-a-count__ ''int'' |
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In simulation mode, the number of bogies on team |
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A. |
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__-team-b-count__ ''int'' |
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In simulation mode, the number of bogies on team |
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B. |
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!!RESOURCES |
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Configuration of the targets to ping is best done by setting |
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X Resources. |
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__background__ ''(Color)'' |
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See option -background, above; default value is |
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''black''. |
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__sweepColor__ ''(Color)'' |
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See option -sweep-color, above; default value is |
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''#00ff00''. |
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__scopeColor__ ''(Color)'' |
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See option -scope-color, above; default value is |
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''#003300''. |
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__gridColor__ ''(Color)'' |
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See option -grid-color, above; default value is |
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''#00aa00''. |
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__textColor__ ''(Color)'' |
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See option -text-color, above; default value is |
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''#ffff00''. |
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__ttl__ ''(integer)'' |
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See option -ttl, above; default value is ''90'' or one |
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sweep. |
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__ping__ ''(string)'' |
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See option -ping, above. If set to __default__, it will |
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ping the contents of /etc/hosts if possible, otherwise, will |
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run in simulation-mode. |
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__font__ ''(font)'' |
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See option -font, above; default value is |
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''fixed''. |
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__pingTimeout__ ''(Integer)'' |
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See option -pingtimeout, above; default value is |
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3000. |
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__teamAName__ ''string'' |
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See option -team-a-name, above. Default value is |
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__F18__. |
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__teamBName__ ''string'' |
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See option -teamBName, above. Default value is |
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__MIG__. |
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__teamACount__ ''int'' |
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See option -teamACount, above. Default value is |
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4. |
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__teamBCount__ ''int'' |
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See option -teamBCount, above. Default value is |
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4. |
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!!NOTES |
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In order to use the ping sensor, this program must be |
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installed as setuid root, so that it can create an ICMP |
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socket. Root privileges are disavowed shortly after startup |
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(just after connecting to the X server and reading the |
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resource database) so this is ''believed'' to be a safe |
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thing to do, but it is usually recommended that you have as |
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few setuid programs around as possible, on general |
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principles. |
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chown root.root sonar |
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chmod u+s sonar |
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!!SEE ALSO |
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X(1), xscreensaver(1), |
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ping(8) |
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!!COPYRIGHT |
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Copyright 1998 by Stephen Martin. |
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(smartin@canada.com) |
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Permission to use, copy, modify, distribute, and sell this |
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software and its documentation for any purpose is hereby |
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granted without fee, provided that the above copyright |
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notice appear in all copies and that both that copyright |
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notice and this permission notice appear in supporting |
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documentation. No representations are made about the |
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suitability of this software for any purpose. It is provided |
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!!AUTHORS |
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Stephen Martin |
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Thanks to Tom Kelly for suggesting a modular approach to the |
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sensor amoung other things. |
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Thomas Bahls |
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Better subnet support and command-line processing by Jamie |
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Zawinski, 17-Jul-00. |
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---- |