Bryan Blackburn 0x62_0x6c_0x62 at
Thu Sep 25 18:56:36 PDT 2008

On Fri, Sep 26, 2008 at 01:46:20AM +0100, Mark Hattam said:
> Is there something amiss with my MacPorts system?
> I did a
> sudo port install arpwatch
> and it installed arpwatch into /opt/local/sbin ... just the 
> executable, no directory.
> and without making a default (empty) arp.dat and without the ethercodes.dat

When did you last run a 'sudo port selfupdate'?  On my system, arpwatch is
version 2.1a15 and installs more than just the arpwatch binary itself:


> It also didn't seem to complain about not installing libpcap which 
> seems to be a pre-requisite according to all the online documentation 
> about arpwatch. But arpwatch does seem to work regardless.

It's apparently simply linking against the OS-installed libpcap in /usr/lib.
In theory it should probably be linking against the libpcap port.

> It would also be helpful to put in how to generate a up-to-date 
> ethercodes.dat file, not least as I had to work out how to achieve 
> this
> sh massagevendor /opt/local/sbin/oui.txt >/opt/local/sbin/ethercodes.dat
> having downloaded the oui.txt from

I'd say file a ticket against this bit as it could probably install more
files (eg, that massagevendor script at least, perhaps others).


> (or even generate an up to date ethercodes.dat file as part of the 
> port install)
> Mark Hattam

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