runcommand.rb

require 'open3'

#basic shell command
def run_command(current_command)
  Open3.popen2e(current_command) {|stdin, stdout, wait_thr|
    pid = wait_thr.pid # pid of the started process.
    puts pid

    stdout.each do |line| log line end

    exit_status = wait_thr.value # Process::Status object returned.
    puts "exit status '#{exit_status}'"
    return exit_status
  }
end