From: Rob Biedenharn <Rob@...>
Date: 2007-07-04T05:20:49+09:00
Subject: Re: mac addr determination [current winner]

On Jul 3, 2007, at 3:46 PM, ara.t.howard wrote:
> On Jul 3, 2007, at 1:36 PM, Jeff Barczewski wrote:
>> yes, that's a winner.
>>
>> works on win xp
>> works on gentoo linux
>
>     def mac_address
>       return @mac_address if defined? @mac_address
>       re = %r/[^:\-](?:[0-9A-Za-z][0-9A-Za-z][:\-]){5}[0-9A-Za-z] 
> [0-9A-Za-z][^:\-]/o
>       cmds = '/sbin/ifconfig', '/bin/ifconfig', 'ifconfig',  
> 'ipconfig /all'
>
>       null = test(?e, '/dev/null') ? '/dev/null' : 'NUL'
>
>       lines = nil
>       cmds.each do |cmd|
>         stdout = IO.popen("#{ cmd } 2> #{ null }"){|fd|  
> fd.readlines} rescue next
>         next unless stdout and stdout.size > 0
>         lines = stdout and break
>       end
>       raise "all of #{ cmds.join ' ' } failed" unless lines
>
>       candidates = lines.select{|line| line =~ re}
>       raise 'no mac address candidates' unless candidates.first
>
>       maddr = candidates.first[re]
>       raise 'no mac address found' unless maddr
>       @mac_address = maddr.strip
>     end
>
> -a
> --
> we can deny everything, except that we have the possibility of  
> being better. simply reflect on that.
> h.h. the 14th dalai lama

Well, it works on Mac OS X 10.4.10 except that it tells me the mac of  
the en0 (which isn't being used, nothing's plugged in!) rather than  
the en1 of the wireless adapter (which is active).

Is that what you're expecting?

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com