monitor.rb

#!/usr/bin/env ruby

puts "#{"PID".ljust(7)} PROCESS"

lines = %x(ps auxfwww|grep " simplefl[o]w ").lines.map do |line|
  stats, command = line.split("|", 2)
  tokens = stats.split
  { pid: tokens[1], command: command }
end

exit if lines == []

while lines.all?{|l| l[:command] && l[:command].match(/^(\|| )/) }
  lines = lines.inject([]) do |memo, line|
    memo << { pid: line[:pid], command: line[:command].sub(/^./, "") }
    memo
  end
end

lines.each do |line|
  puts "#{line[:pid].ljust(7)} #{line[:command].sub(/^\|/, " ")}"
end