DNS should use search domains by default?

[ioquatix]

Following from celluloid/celluloid-io#146 (comment)

• If an instance of Celluloid::DNS::Resolver is created, do we consult resolve.conf for every request?
• If a user specifies a search prefix, do we consult resolve.conf at all?
• How does resolv.conf work on Mac OS X and is it compatible with Linux? What about Windows?
• Does it make sense to use a native implementation of DNS for system-level DNS resolution, i.e. should we simply have Celluloid::DNS::Resolver defer to the OS supplied implementation?

[Asmod4n]

Ruby has a class which deals which nameserver, search etc from resolv.conf and the Windows Registry: https://github.com/ruby/ruby/blob/v2_2_3/lib/resolv.rb#L959

[Asmod4n]

On OS X you also have to look inside the /etc/resolver directory: https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man5/resolver.5.html

[ioquatix]

Yes, I was thinking that on Mac OS X, the resolv.rb code wouldn't work correctly.