Module: RubyDNS::System
- Defined in:
- lib/rubydns/system.rb
Overview
This module encapsulates system dependent name lookup functionality.
Defined Under Namespace
Classes: Hosts
Constant Summary collapse
- RESOLV_CONF =
"/etc/resolv.conf"
- HOSTS =
"/etc/hosts"
Class Method Summary collapse
- .hosts_path ⇒ Object
-
.nameservers ⇒ Object
Get a list of standard nameserver connections which can be used for querying any standard servers that the system has been configured with.
- .parse_resolv_configuration(path) ⇒ Object
- .standard_connections(nameservers) ⇒ Object
Class Method Details
.hosts_path ⇒ Object
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# File 'lib/rubydns/system.rb', line 33 def self.hosts_path if RUBY_PLATFORM =~ /mswin32|mingw|bccwin/ Win32::Resolv.get_hosts_path else HOSTS end end |
.nameservers ⇒ Object
Get a list of standard nameserver connections which can be used for querying any standard servers that the system has been configured with. There is no equivalent facility to use the hosts
file at present.
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# File 'lib/rubydns/system.rb', line 134 def self.nameservers nameservers = [] if File.exist? RESOLV_CONF nameservers = parse_resolv_configuration(RESOLV_CONF) elsif defined?(Win32::Resolv) and RUBY_PLATFORM =~ /mswin32|cygwin|mingw|bccwin/ search, nameservers = Win32::Resolv.get_resolv_info end return standard_connections(nameservers) end |
.parse_resolv_configuration(path) ⇒ Object
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# File 'lib/rubydns/system.rb', line 102 def self.parse_resolv_configuration(path) nameservers = [] File.open(path) do |file| file.each do |line| # Remove any comments: line.sub!(/[#;].*/, '') # Extract resolv.conf command: keyword, *args = line.split(/\s+/) case keyword when 'nameserver' nameservers += args end end end return nameservers end |
.standard_connections(nameservers) ⇒ Object
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# File 'lib/rubydns/system.rb', line 122 def self.standard_connections(nameservers) connections = [] nameservers.each do |host| connections << [:udp, host, 53] connections << [:tcp, host, 53] end return connections end |