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#!/usr/bin/env ruby

PASSENGER_STATUS = ENV['passenger_status'] || '/usr/local/bin/passenger-status'

def output_config
  puts <<-END
graph_category Passenger
graph_title passenger status
graph_vlabel count

sessions.label sessions
max.label max processes
running.label running processes
active.label active processes
inactive.label inactive processes
END
  exit 0
end

def output_values
  status = `#{PASSENGER_STATUS}`
  unless $?.success?
    $stderr.puts "failed executing passenger-status"
    exit 1
  end
  status =~ /max\s+=\s+(\d+)/
  puts "max.value #{$1}"

  status =~ /count\s+=\s+(\d+)/
  puts "running.value #{$1}"

  status =~ /active\s+=\s+(\d+)/
  puts "active.value #{$1}"

  status =~ /inactive\s+=\s+(\d+)/
  puts "inactive.value #{$1}"

  total_sessions = 0
  status.scan(/Sessions: (\d+)/).flatten.each { |count| total_sessions += count.to_i }
  puts "sessions.value #{total_sessions}"
end

if ARGV[0] == "config"
  output_config
else
  output_values
end