Module: Mac

Defined in:
lib/macaddr.rb

Constant Summary collapse

VERSION = 
'1.6.1'
RE = 
%r/(?:[^:\-]|\A)(?:[0-9A-F][0-9A-F][:\-]){5}[0-9A-F][0-9A-F](?:[^:\-]|\Z)/io

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.mac_address ⇒ Object

Accessor for the system’s first MAC address, requires a call to #address first



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# File 'lib/macaddr.rb', line 45

def mac_address
  @mac_address
end

Class Method Details

.address ⇒ Object Also known as: addr

Discovers and returns the system’s MAC addresses. Returns the first MAC address, and includes an accessor #list for the remaining addresses:

Mac.addr # => first address
Mac.addr.list # => all addresses



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# File 'lib/macaddr.rb', line 54

def address
  return @mac_address if defined? @mac_address and @mac_address
  re = %r/[^:\-](?:[0-9A-F][0-9A-F][:\-]){5}[0-9A-F][0-9A-F][^:\-]/io
  cmds = '/sbin/ifconfig', '/bin/ifconfig', 'ifconfig', 'ipconfig /all', 'cat /sys/class/net/*/address'

  null = test(?e, '/dev/null') ? '/dev/null' : 'NUL'

  output = nil
  cmds.each do |cmd|
    status, stdout, stderr = systemu(cmd) rescue next
    next unless stdout and stdout.size > 0
    output = stdout and break
  end
  raise "all of #{ cmds.join ' ' } failed" unless output

  @mac_address = parse(output)
end

.dependencies ⇒ Object 



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# File 'lib/macaddr.rb', line 32

def Mac.dependencies
  {
    'systemu' => [ 'systemu' , '~> 2.5.0' ]
  }
end

.parse(output) ⇒ Object 



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# File 'lib/macaddr.rb', line 72

def parse(output)
  lines = output.split(/\n/)

  candidates = lines.select{|line| line =~ RE}
  raise 'no mac address candidates' unless candidates.first
  candidates.map!{|c| c[RE].strip}

  maddr = candidates.first
  raise 'no mac address found' unless maddr

  maddr.strip!
  maddr.instance_eval{ @list = candidates; def list() @list end }
  maddr
end

.version ⇒ Object 



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# File 'lib/macaddr.rb', line 28

def Mac.version
  ::Mac::VERSION
end