udp-to-syslog

#!/usr/bin/env ruby
require 'socket'
require 'logger'
require 'syslog'
require 'optparse'

options = {
	:ident => 'udp-to-syslog',
	:port  => 6666
}

parser = OptionParser.new do |opts|
	nl = "\n" + ' ' * 37
	opts.banner = "Usage: udp-to-syslog [options]"
	opts.separator "Forwards UDP messages to syslog."
	opts.separator ""
	
	opts.separator "Options:"
	opts.on("-i", "--ident NAME",
	        "Use the given syslog ident. Default: udp-to-syslog") do |value|
		options[:ident] = value
	end
	opts.on("-p", "--port PORT",
	        "Listen on the given port. Default: 6666") do |value|
		options[:port] = value
	end
end
begin
	parser.parse!
rescue OptionParser::ParseError => e
	STDERR.puts e
	STDERR.puts
	STDERR.puts "Please see '--help' for valid options."
	exit 1
end

include Syslog::Constants

Syslog.open(options[:ident], 0, LOG_USER)
logger = Logger.new(STDERR)

sock = UDPSocket.new
sock.bind('0.0.0.0', options[:port])
begin
	while true
		msg, addr = sock.recvfrom(1024 * 128)
		Syslog.log(LOG_CRIT, "#{addr[2]}: #{msg}")
		logger.warn("#{addr[2]}: #{msg}")
	end
rescue Interrupt
rescue SignalException => e
	raise if e.signo != Signal.list['TERM']
end