From: Jeff Barczewski <jeff.barczewski@...>
Date: 2007-07-04T04:27:18+09:00
Subject: Re: mac addr determination

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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
      lines = nil
      cmds = '/sbin/ifconfig', '/bin/ifconfig', 'ifconfig',
'ipconfig /all'

      cmds.each do |cmd|
        begin
          stdout = IO.popen(cmd){|fd| fd.readlines}
        rescue
          stdout = nil
        end
        next unless stdout and stdout.size > 0
        lines = stdout and break
      end
      raise "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

 puts mac_address


Note: I needed to wrap with begin rescue to get it to work on windows

- works on gentoo linux
- works on windows



-- 
Jeff Barczewski, MasterView core team
Inspired Horizons Ruby on Rails Training and Consultancy
http://inspiredhorizons.com/

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