accept_nonblock

Accepts an incoming connection using accept(2) after O_NONBLOCK is set for the underlying file descriptor. It returns an accepted UNIXSocket for the incoming connection.

Example

require 'socket'
serv = UNIXServer.new("/tmp/sock")
begin # emulate blocking accept
  sock = serv.accept_nonblock
rescue IO::WaitReadable, Errno::EINTR
  IO.select([serv])
  retry
end
# sock is an accepted socket.

Refer to Socket#accept for the exceptions that may be thrown if the call to #accept_nonblock fails.

#accept_nonblock may raise any error corresponding to accept(2) failure, including Errno::EWOULDBLOCK.

If the exception is Errno::EWOULDBLOCK, Errno::AGAIN, Errno::ECONNABORTED or Errno::EPROTO, it is extended by IO::WaitReadable. So IO::WaitReadable can be used to rescue the exceptions for retrying accept_nonblock.

See

• #accept

• Socket#accept