Ruby PIDs

PNG_REGEX = Regexp.new(".*png")

path = File.expand_path("..")
print "PATH = #{path}\n"
d = Dir.new("#{path}/") #Open all png images

def is_png?(folder, filename)
  return PNG_REGEX.match?(filename)
end

print "Running processes: ", Process.groups.to_s

d.each { |file|
  if(is_png?(path, file))
    puts "Opening... #{file}"
    opened_process = IO.popen("open -g -n \"#{path}/#{file}\"")
    print "Parent is #{Process.pid}"
    print "Child is #{opened_process.pid}" #This changes after
    # calling "open"... Not sure how to get new pid

    in_str = gets #Simulate getting some input
    # Close opened file after gets finishes (How??)
    Process.kill("TERM", opened_process.pid)
  end
}