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Date:      Sun, 03 Aug 1997 02:12:04 -0700
From:      David Greenman <dg@root.com>
To:        j@uriah.heep.sax.de (J Wunsch)
Cc:        freebsd-bugs@hub.freebsd.org
Subject:   Re: bin/4218: change in ping behavior: -c now counts _received_ packets 
Message-ID:  <199708030912.CAA22377@implode.root.com>
In-Reply-To: Your message of "Sun, 03 Aug 1997 01:00:02 PDT." <199708030800.BAA12082@hub.freebsd.org> 

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> I agree that this behaviour is not what one would usually expect from
> -c, but it seems to be this way in all ping -c versions i've seen so
> far.
> 
> What makes you think this has been changed recently?  You can easily
> verify in CVS that it has been this way all the time for FreeBSD, at
> least.  So, while you're constantly speaking about `reverting'
> something, there isn't really something to revert.  Implementing it as
> a count of _sent_ packets would be a plain paradigm change, so it
> should probably be done with a different option.

   Hmmm. FreeBSD 2.1.x and 2.2.x both do something a bit more complicated
than just wait for the <n> packets to be received. ping will transmit up
to <n> packets and wait for these to be received; it will wait for the
first received packet for up to 10 seconds, and a variable amount of time
(twice the maximum round trip time) if one or more have already been
received.

So:

ping -c 1 198.1.1.1		# a host that doesn't exist

   ...will wait for 10 seconds and then exit.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project



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