What is the proper way to get FQDN of current host?-CodePudding

For some time I was using code:

hostname = Socket.gethostbyname(Socket.gethostname).first

taken from here.

But, as the comment said - it's deprecated, and now both rubocop and ruby itself are complaining:

=$ ./z.rb 
./z.rb:5: warning: Socket.gethostbyname is deprecated; use Addrinfo.getaddrinfo instead.

=$ rubocop z.rb
...
z.rb:5:13: W: Lint/DeprecatedClassMethods: Socket.gethostbyname is deprecated in favor of Addrinfo#getaddrinfo.
puts Socket.gethostbyname(Socket.gethostname).first
            ^^^^^^^^^^^^^

The problem is that I don't know how to use getaddrinfo to get the same information. Anyone could show an example?

For now, I figured I'll just use:

`hostname --fqdn`

which works, as I only run it on Linux, but it's not really nice approach.

CodePudding user response：

Got help in some other way, but figured others might benefit too.

Current way to do it is:

Addrinfo.getaddrinfo(Socket.gethostname, nil).first.getnameinfo.first