* lib/webrick/server.rb: use IO::NULL instead of '/dev/null'

* test/ruby/test_string.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51709 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Thu Aug 27 18:05:42 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* lib/webrick/server.rb: use IO::NULL instead of '/dev/null'
+	* test/ruby/test_string.rb: ditto.
+
 Thu Aug 27 15:24:57 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* compile.c (iseq_set_sequence): rename variable names

lib/webrick/server.rb

@@ -48,9 +48,9 @@ def Daemon.start
       exit!(0) if fork
       Dir::chdir("/")
       File::umask(0)
-      STDIN.reopen("/dev/null")
-      STDOUT.reopen("/dev/null", "w")
-      STDERR.reopen("/dev/null", "w")
+      STDIN.reopen(IO::NULL)
+      STDOUT.reopen(IO::NULL, "w")
+      STDERR.reopen(IO::NULL, "w")
       yield if block_given?
     end
   end

test/ruby/test_string.rb

@@ -464,8 +464,7 @@ def test_clone
       end
     end
 
-    null = File.exist?("/dev/null") ? "/dev/null" : "NUL" # maybe DOSISH
-    assert_equal("", File.read(null).clone, '[ruby-dev:32819] reported by Kazuhiro NISHIYAMA')
+    assert_equal("", File.read(IO::NULL).clone, '[ruby-dev:32819] reported by Kazuhiro NISHIYAMA')
   end
 
   def test_concat