Class: RubyDNS::System::Hosts

Inherits:
Object
  • Object
show all
Defined in:
lib/rubydns/system.rb

Overview

This code is very experimental

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Hosts

Returns a new instance of Hosts.



43
44
45
46
 
# File 'lib/rubydns/system.rb', line 43

def initialize
  @addresses = {}
  @names = {}
end

Instance Attribute Details

#addresses ⇒ Object (readonly)

Returns the value of attribute addresses.



48
49
50
 
# File 'lib/rubydns/system.rb', line 48

def addresses
  @addresses
end

#names ⇒ Object (readonly)

Returns the value of attribute names.



49
50
51
 
# File 'lib/rubydns/system.rb', line 49

def names
  @names
end

Class Method Details

.local ⇒ Object 



87
88
89
90
91
92
93
94
95
96
97
98
99
 
# File 'lib/rubydns/system.rb', line 87

def self.local
  hosts = self.new

  path = System::hosts_path

  if path and File.exist?(path)
    File.open(path) do |file|
      hosts.parse_hosts(file)
    end
  end

  return hosts
end

Instance Method Details

#add(address, names) ⇒ Object 



68
69
70
71
72
73
74
75
76
 
# File 'lib/rubydns/system.rb', line 68

def add(address, names)
  @addresses[address] ||= []
  @addresses[address] += names

  names.each do |name|
    @names[name] ||= []
    @names[name] << address
  end
end

#call(name) ⇒ Object

This is used to match names against the list of known hosts:



52
53
54
 
# File 'lib/rubydns/system.rb', line 52

def call(name)
  @names.include?(name)
end

#lookup(name) ⇒ Object Also known as: [] 



56
57
58
59
60
61
62
63
64
 
# File 'lib/rubydns/system.rb', line 56

def lookup(name)
  addresses = @names[name]

  if addresses
    addresses.last
  else
    nil
  end
end

#parse_hosts(io) ⇒ Object 



78
79
80
81
82
83
84
85
 
# File 'lib/rubydns/system.rb', line 78

def parse_hosts(io)
  io.each do |line|
    line.sub!(/#.*/, '')
    address, hostname, *aliases = line.split(/\s+/)

    add(address, [hostname] + aliases)
  end
end