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diff --git a/ruby_1_8_5/sample/drb/drbs.rb b/ruby_1_8_5/sample/drb/drbs.rb
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+=begin
+ distributed Ruby --- dRuby Sample Server
+ 	Copyright (c) 1999-2000,2002 Masatoshi SEKI 
+=end
+
+=begin
+ How to play.
+
+ Terminal 1
+ | % ruby drbs.rb 
+ | druby://yourhost:7640
+
+ Terminal 2
+ | % ruby drbc.rb druby://yourhost:7640
+ | "hello"
+ | ....
+
+=end
+
+require 'drb/drb'
+
+class DRbEx
+  include DRbUndumped
+
+  def initialize
+    @hello = 'hello'
+  end
+
+  def hello
+    cntxt = Thread.current['DRb']
+    if cntxt
+      p cntxt['server'].uri
+      p cntxt['client'].peeraddr
+    end
+    Foo::Unknown.new
+  end
+
+  def err
+    raise FooError
+  end
+
+  def sample(a, b, c)
+    a.to_i + b.to_i + c.to_i
+  end
+end
+
+class Foo
+  class Unknown
+  end
+end
+
+class FooError < RuntimeError
+end
+
+if __FILE__ == $0
+  DRb.start_service(ARGV.shift || 'druby://:7640', DRbEx.new)
+  puts DRb.uri
+  Thread.new do
+    sleep 10
+    DRb.stop_service
+  end
+  DRb.thread.join
+end
+