Module: Mac

Defined in:
lib/macaddr.rb

Constant Summary collapse

VERSION = 
'1.7.0'
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



50
51
52
 
# File 'lib/macaddr.rb', line 50

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



59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
 
# File 'lib/macaddr.rb', line 59

def address
  return @mac_address if defined? @mac_address and @mac_address

  @mac_address = from_getifaddrs
  return @mac_address if @mac_address

  cmds = '/sbin/ifconfig', '/bin/ifconfig', 'ifconfig', 'ipconfig /all', 'cat /sys/class/net/*/address'

  output = nil
  cmds.each do |cmd|
    _, stdout, _ = 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 



33
34
35
36
37
 
# File 'lib/macaddr.rb', line 33

def Mac.dependencies
  {
    'systemu' => [ 'systemu' , '~> 2.6.2' ]
  }
end

.description ⇒ Object 



39
40
41
 
# File 'lib/macaddr.rb', line 39

def Mac.description
  'cross platform mac address determination for ruby'
end

.from_getifaddrs ⇒ Object 



78
79
80
81
82
83
84
85
86
87
88
89
90
91
 
# File 'lib/macaddr.rb', line 78

def from_getifaddrs
  return unless Socket.respond_to? :getifaddrs

  mac, =
    Socket.getifaddrs.select do |addr|
      addr.addr.pfamily == Socket::PF_LINK
    end.map do |addr|
      addr.addr.getnameinfo
    end.find do |m,|
      !m.empty?
    end

  @mac_address = mac if mac
end

.parse(output) ⇒ Object 



93
94
95
96
97
98
99
100
101
102
103
104
105
106
 
# File 'lib/macaddr.rb', line 93

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 



29
30
31
 
# File 'lib/macaddr.rb', line 29

def Mac.version
  ::Mac::VERSION
end