http://slackware.bholcomb.com/slackware/slackware-11.0/source/xap/xscreensaver/xscree...

[xscreensaver] / hacks / sonar.man

diff --git a/hacks/sonar.man b/hacks/sonar.man
index 1db5982abd20a6bf760a5f3e1a1f1214621119ce..5868acc0762e7c36f91af222d092dfd97b1697f0 100644 (file)
--- a/hacks/sonar.man
+++ b/hacks/sonar.man
@@ -30,6 +30,8 @@ sonar - display a sonar scope
 [\-team-b-name \fIstring\fP]
 [\-team-a-count \fIint\fP]
 [\-team-b-count \fIint\fP]
 [\-team-b-name \fIstring\fP]
 [\-team-a-count \fIint\fP]
 [\-team-b-count \fIint\fP]

+[\-no\-dns] 
+[\-no\-times] 

 [\-debug] 
 .SH DESCRIPTION
 The \fIsonar\fP program displays a sonar scope on the computer's screen.
 [\-debug] 
 .SH DESCRIPTION
 The \fIsonar\fP program displays a sonar scope on the computer's screen.


@@ -103,6 +105,12 @@ names as the first element on each line.  If you use ssh, try this:
   sonar -ping $HOME/.ssh/known_hosts
 .RE
 .TP 8
   sonar -ping $HOME/.ssh/known_hosts
 .RE
 .TP 8

+.B \-no\-dns
+Do not attempt to resolve IP addresses to hostnames.
+.TP 8
+.B \-no\-times
+Do not display ping times beneath the host names.
+.TP 8

 .B \-team-a-name \fIstring\fP
 In simulation mode, the name of team A.
 .TP 8
 .B \-team-a-name \fIstring\fP
 In simulation mode, the name of team A.
 .TP 8


@@ -159,14 +167,36 @@ See option \-teamACount, above.  Default value is 4.
 .B teamBCount \fIint\fP
 See option \-teamBCount, above.  Default value is 4.
 .SH NOTES
 .B teamBCount \fIint\fP
 See option \-teamBCount, above.  Default value is 4.
 .SH NOTES

-In order to use the ping sensor, this program must be installed as 
-setuid root, so that it can create an ICMP socket.
+In order to use the ping sensor on most systems, this program must be
+installed as setuid root, so that it can create an ICMP RAW socket.
+Root privileges are disavowed shortly after startup (just after
+connecting to the X server and reading the resource database) so this
+is \fIbelieved\fP 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.
+.EX
+chown root:root sonar
+chmod u+s sonar
+.EE
+It is not necessary to make it setuid on MacOS systems, because on
+those systems, unprivileged programs can ping by using ICMP DGRAM
+sockets instead of ICMP RAW.
+
+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.)

 .SH SEE ALSO
 .BR X (1),
 .BR xscreensaver (1),
 .BR ping (8)
 .SH COPYRIGHT
 .SH SEE ALSO
 .BR X (1),
 .BR xscreensaver (1),
 .BR ping (8)
 .SH COPYRIGHT

-Copyright \(co 1998 by Stephen Martin. (smartin@canada.com)
+Copyright \(co 1998 by Stephen Martin. <smartin@canada.com>
+Copyright \(co 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, provided that
 
 Permission to use, copy, modify, distribute, and sell this software and its
 documentation for any purpose is hereby granted without fee, provided that


@@ -180,7 +210,7 @@ implied warranty.
 Stephen Martin <smartin@canada.com>, 3-nov-98.
 
 Thanks to Tom Kelly for suggesting a modular approach to the sensor
 Stephen Martin <smartin@canada.com>, 3-nov-98.
 
 Thanks to Tom Kelly for suggesting a modular approach to the sensor

-amoung other things.
+among other things.

 
 Thomas Bahls <thommy@cs.tu-berlin.de> hacked the "ttl" option, 12-jul-98.
 
 
 Thomas Bahls <thommy@cs.tu-berlin.de> hacked the "ttl" option, 12-jul-98.