Class: Host

Inherits:
Object
  • Object
show all
Defined in:
lib/ghost/mac-host.rb,
lib/ghost/linux-host.rb

Constant Summary collapse

ListCmd = 
"dscl localhost -list /Local/Default/Hosts 2>&1"
ReadCmd = 
"dscl localhost -read /Local/Default/Hosts/%s 2>&1"
CreateCmd = 
"sudo dscl localhost -create /Local/Default/Hosts/%s IPAddress %s 2>&1"
DeleteCmd = 
"sudo dscl localhost -delete /Local/Default/Hosts/%s 2>&1"
@@hosts_file = 
'/etc/hosts'
@@permanent_hosts = 
[Host.new("localhost",      "127.0.0.1"),
Host.new(`hostname`.chomp, "127.0.0.1")]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(host, ip) ⇒ Host

Returns a new instance of Host.



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# File 'lib/ghost/mac-host.rb', line 94

def initialize(host, ip=nil)
  @host = host
  @ip = ip
end

Instance Attribute Details

#ip ⇒ Object (readonly)

Returns the value of attribute ip.



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# File 'lib/ghost/mac-host.rb', line 106

def ip
  @ip ||= self.class.send(:parse_ip, dump)
end

Class Method Details

.add(host, ip = "127.0.0.1", force = false) ⇒ Object 



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# File 'lib/ghost/mac-host.rb', line 18

def add(host, ip = "127.0.0.1", force = false)
  if find_by_host(host).nil? || force
    unless ip[/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})?$/]
      ip = Socket.gethostbyname(ip)[3].bytes.to_a.join('.')
    end
    
    `#{CreateCmd % [host, ip]}`
    flush!
    find_by_host(host)
  else
    raise "Can not overwrite existing record"
  end      
end

.delete(name) ⇒ Object 



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# File 'lib/ghost/mac-host.rb', line 57

def delete(host)
  `#{DeleteCmd % host.to_s}`
  flush!
end

.delete_matching(pattern) ⇒ Object 



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# File 'lib/ghost/mac-host.rb', line 62

def delete_matching(pattern)
  pattern = Regexp.escape(pattern)
  hosts = list.select { |h| h.to_s.match(/#{pattern}/) }
  hosts.each do |h|
    delete(h)
  end
  flush! unless hosts.empty?
  hosts
end

.empty! ⇒ Object 



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# File 'lib/ghost/mac-host.rb', line 52

def empty!
  list.each { |h| delete(h) }
  nil
end

.find_by_host(hostname) ⇒ Object 



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# File 'lib/ghost/mac-host.rb', line 32

def find_by_host(host)
  @hosts ||= {}
  @hosts[host] ||= begin
    output = `#{ReadCmd % host}`
  
    if output =~ /eDSRecordNotFound/
      nil
    else
      host = parse_host(output)
      ip = parse_ip(output)
    
      Host.new(host, ip)
    end
  end
end

.find_by_ip(ip) ⇒ Object 



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# File 'lib/ghost/mac-host.rb', line 48

def find_by_ip(ip)
  nil
end

.flush! ⇒ Object

Flushes the DNS Cache



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# File 'lib/ghost/mac-host.rb', line 73

def flush!
  `dscacheutil -flushcache`
  @hosts = {}
  true
end

.list ⇒ Object 



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# File 'lib/ghost/mac-host.rb', line 12

def list
  list = `#{ListCmd}`
  list = list.split("\n")
  list.collect { |host| Host.new(host.chomp) }
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/ghost/linux-host.rb', line 9

def ==(other)
  @host == other.host && @ip = other.ip
end