STDIN JSON parser

jsongrep.rb

require 'rubygems'
require 'fcntl'
require 'json'
block = ""
# Set $stdin to be non-blocking
$stdin.fcntl(Fcntl::F_SETFL,Fcntl::O_NONBLOCK)
  begin
    $stdin.each_line { |line|
         block << line
    }
        json = JSON.parse(block)
        print json['data'].unpack("m")
  rescue Errno::EAGAIN
   # Remove this thread since we won't be reading from $stdin
  end