Ruby script to return Exim Queue IDs of messages with a given SMTP Auth value

exim-queue-auth

#!/usr/bin/env ruby

INPUT_DIR = '/var/spool/exim/input/'
AUTH_ID   = '-auth_id '

auth_id = ARGV[0]

if auth_id.nil? || auth_id == ""
  puts "Usage: #{$0} auth_id"
  exit
end

needle = "#{AUTH_ID}#{auth_id}"
length = AUTH_ID.length

Dir.foreach(INPUT_DIR) do |file|
  next if file == '.' || file == '..'
  next unless file =~ /\-H$/

  path = File.join(INPUT_DIR, file)
  data = File.read(path)

  data.lines.each do |line|
    if AUTH_ID == line[0,length]  # Find -auth_id line
      if needle == line.strip     # Compare with needle
        puts file[0..-3]          # Emit message ID
      end
      
      break                       # Leave loop whether we've found needle or not
    end
  end
end