ENOENT while creating a UNIX socket in Ruby

Question

I'm trying to create a socket in Ruby using

require "socket"
w = UNIXSocket.new("socket")

and I keep running into

No such file or directory - socket (Errno::ENOENT)

This looks completely backwards to me, because new() is supposed to create that missing file. What am I missing?

permission problem? Or in a directory that doesn't exist yet? — Chuck Vose
– Chuck Vose, Commented Sep 30, 2010 at 2:32
@Chuck Vose: Definitely neither of those...that's why it's so perplexing. — Vlad the Impala
– Vlad the Impala, Commented Sep 30, 2010 at 2:38
Still trying to find an example of how to do it right. I'm seeing the same problem on my system — Chuck Vose
– Chuck Vose, Commented Sep 30, 2010 at 2:44
Dunno, maybe we're both cracked. I can't find examples that are more complicated than this. — Chuck Vose
– Chuck Vose, Commented Sep 30, 2010 at 2:49

Chuck Vose · Accepted Answer · 2015-10-17 01:12:02Z

7

This is super old. Please don't try to use it verbatim anymore.

http://blog.antarestrader.com/posts/153

#!/ruby
file = 'path/to/my/socket'
File.unlink if File.exists(file) && File.socket?(file)
server = UNIXServer.new(file)
# return a UNIXSocket once a connection is made 
socket = server.accept
# socket is now ready to communicate.

UnixServer makes the socket, UnixSocket only connects to an existing socket.

edited Oct 17, 2015 at 1:12

answered Sep 30, 2010 at 2:51

Chuck Vose

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4 Comments

Vlad the Impala Over a year ago

Wow, thank you. It's crazy that this information isn't more easily accessible. Every example I found showed new as creating a new socket.

Ryan Bigg Over a year ago

This code does not work on Ruby 2.0.0 for me. First: File.unlink takes a path. Second, I get the same no such file or directory error as the OP.

radiospiel Over a year ago

This should probably be "File.unlink(file)" in the code

James Over a year ago

What is the modern way to do this?

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This is super old. Please don't try to use it verbatim anymore.

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This is super old. Please don't try to use it verbatim anymore.

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