From: Ralf Canis <rc@...>
Date: 2001-07-24T23:10:52+09:00
Subject: [ruby-talk:18430] nonblocking socket error under windows?

Hi,

those few lines crash with 

  No buffer space available; the socket cannot be connected -
  "recvfrom(2)" (Errno::ENOBUFS)

under Windows (1.6.4 install-shield version) but work fine with the Linux
version. 

Looks like a call to recv on a nonblocking socket WITHOUT any data to read
causes this "bug".

- Anybody can confirm this?
- Does a method exist to check if there is anything in the
  input queue without calling recv? (ok, I can catch this exception but
  there has to be a better solution)

---snip---
require 'fcntl'
require 'net/telnet'
tn = Net::Telnet.new('Host' => 'hostname goes here')
tn.fcntl(Fcntl::F_SETFL, Fcntl::O_NONBLOCK)
tn.print("login string\n")
loop do
  data = tn.recv(1024)
  break if data.empty?
  puts data
end
---snip---

Regards
  Ralf