A Unix Domain Socket Client

#!/usr/bin/env ruby

if ARGV.size != 1
  STDERR.puts("Arguments: <filename>")
  exit(1)
end  

require "socket" 

UNIXSocket.open(ARGV[0]) do |socket|
  while input = STDIN.gets
    socket.write(input)
    socket.flush

    output = socket.gets
    STDOUT.write(output)
  end
end

Please note that this script operates on a line by line basis.

Alternatives

`netcat`

nc -U filename

`socat`

socat - UNIX-CONNECT:filename