class Resolv::Hosts

Resolv::Hosts is a hostname resolver that uses the system hosts file.

Constants

DefaultFileName

Public Class Methods

new (filename = DefaultFileName)

Creates a new Resolv::Hosts, using filename for its data source.

# File lib/resolv.rb, line 183
def initialize(filename = DefaultFileName)
  @filename = filename
  @mutex = Thread::Mutex.new
  @initialized = nil
end

Public Instance Methods

each_address (name, &proc)

Iterates over all IP addresses for name retrieved from the hosts file.

# File lib/resolv.rb, line 230
def each_address(name, &proc)
  lazy_initialize
  @name2addr[name]&.each(&proc)
end

each_name (address, &proc)

Iterates over all hostnames for address retrieved from the hosts file.

# File lib/resolv.rb, line 255
def each_name(address, &proc)
  lazy_initialize
  @addr2name[address]&.each(&proc)
end

getaddress (name)

Gets the IP address of name from the hosts file.

# File lib/resolv.rb, line 213
def getaddress(name)
  each_address(name) {|address| return address}
  raise ResolvError.new("#{@filename} has no name: #{name}")
end

getaddresses (name)

Gets all IP addresses for name from the hosts file.

# File lib/resolv.rb, line 221
def getaddresses(name)
  ret = []
  each_address(name) {|address| ret << address}
  return ret
end

getname (address)

Gets the hostname of address from the hosts file.

# File lib/resolv.rb, line 238
def getname(address)
  each_name(address) {|name| return name}
  raise ResolvError.new("#{@filename} has no address: #{address}")
end

getnames (address)

Gets all hostnames for address from the hosts file.

# File lib/resolv.rb, line 246
def getnames(address)
  ret = []
  each_name(address) {|name| ret << name}
  return ret
end