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/Ruby 4.0

class Resolv::Hosts

Parent:: Object

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

Constants

DefaultFileName: The default file name for host names

Public Class Methods

# File lib/resolv.rb, line 195
def initialize(filename = DefaultFileName)
  @filename = filename
  @mutex = Thread::Mutex.new
  @initialized = nil
end

new (filename = DefaultFileName) Show source

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

Public Instance Methods

# File lib/resolv.rb, line 242
def each_address(name, &proc)
  lazy_initialize
  @name2addr[name]&.each(&proc)
end

each_address (name, &proc) Show source

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

# File lib/resolv.rb, line 267
def each_name(address, &proc)
  lazy_initialize
  @addr2name[address]&.each(&proc)
end

each_name (address, &proc) Show source

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

# File lib/resolv.rb, line 225
def getaddress(name)
  each_address(name) {|address| return address}
  raise ResolvError.new("#{@filename} has no name: #{name}")
end

getaddress (name) Show source

Gets the IP address of name from the hosts file.

# File lib/resolv.rb, line 233
def getaddresses(name)
  ret = []
  each_address(name) {|address| ret << address}
  return ret
end

getaddresses (name) Show source

Gets all IP addresses for name from the hosts file.

# File lib/resolv.rb, line 250
def getname(address)
  each_name(address) {|name| return name}
  raise ResolvError.new("#{@filename} has no address: #{address}")
end

getname (address) Show source

Gets the hostname of address from the hosts file.

# File lib/resolv.rb, line 258
def getnames(address)
  ret = []
  each_name(address) {|name| ret << name}
  return ret
end

getnames (address) Show source

Gets all hostnames for address from the hosts file.

Ruby Core © 1993–2025 Yukihiro Matsumoto
Licensed under the Ruby License.
Ruby Standard Library © contributors
Licensed under their own licenses.