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qotd.rb
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qotd.rb
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require 'socket'
require 'thread'
class MissingQuoteFile < StandardError; end
class QOTDServer
def self.root_user?
ENV["USER"] == "root"
end
attr_accessor :quotes
def initialize(path="quotes.txt",is_daemon = false)
is_root_or_abort
@quotes = File.open(path,"r").readlines.map{|q| q.chomp }
@is_daemon = is_daemon
rescue Errno::ENOENT
raise MissingQuoteFile, "You must initialize with a quotes file!"
end
def random_quote
@quotes[rand(@quotes.length)]
end
def run!
@server = TCPServer.new 17 # Server bind to port 2000
if @is_daemon
do_thing
else
Thread.new { do_thing }
end
end
private
def do_thing
loop do
@client = @server.accept # Wait for a client to connect
@client.puts random_quote
@client.close
end
end
def is_root_or_abort
if !QOTDServer.root_user?
abort "You must run QOTD as root, since it needs to bind to port 17 as RFC865 defines!"
end
end
end
if __FILE__ == $0
puts "Running for file #{ARGV[0]} as a daemon...try `nc localhost 17`"
QOTDServer.new(ARGV[0], true).run!
end