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diff --git a/jni/ruby/lib/shellwords.rb b/jni/ruby/lib/shellwords.rb
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+##
+# == Manipulates strings like the UNIX Bourne shell
+#
+# This module manipulates strings according to the word parsing rules
+# of the UNIX Bourne shell.
+#
+# The shellwords() function was originally a port of shellwords.pl,
+# but modified to conform to POSIX / SUSv3 (IEEE Std 1003.1-2001 [1]).
+#
+# === Usage
+#
+# You can use Shellwords to parse a string into a Bourne shell friendly Array.
+#
+#   require 'shellwords'
+#
+#   argv = Shellwords.split('three blind "mice"')
+#   argv #=> ["three", "blind", "mice"]
+#
+# Once you've required Shellwords, you can use the #split alias
+# String#shellsplit.
+#
+#   argv = "see how they run".shellsplit
+#   argv #=> ["see", "how", "they", "run"]
+#
+# Be careful you don't leave a quote unmatched.
+#
+#   argv = "they all ran after the farmer's wife".shellsplit
+#        #=> ArgumentError: Unmatched double quote: ...
+#
+# In this case, you might want to use Shellwords.escape, or its alias
+# String#shellescape.
+#
+# This method will escape the String for you to safely use with a Bourne shell.
+#
+#   argv = Shellwords.escape("special's.txt")
+#   argv #=> "special\\'s.txt"
+#   system("cat " + argv)
+#
+# Shellwords also comes with a core extension for Array, Array#shelljoin.
+#
+#   argv = %w{ls -lta lib}
+#   system(argv.shelljoin)
+#
+# You can use this method to create an escaped string out of an array of tokens
+# separated by a space. In this example we used the literal shortcut for
+# Array.new.
+#
+# === Authors
+# * Wakou Aoyama
+# * Akinori MUSHA <knu@iDaemons.org>
+#
+# === Contact
+# * Akinori MUSHA <knu@iDaemons.org> (current maintainer)
+#
+# === Resources
+#
+# 1: {IEEE Std 1003.1-2004}[http://pubs.opengroup.org/onlinepubs/009695399/toc.htm]
+
+module Shellwords
+  # Splits a string into an array of tokens in the same way the UNIX
+  # Bourne shell does.
+  #
+  #   argv = Shellwords.split('here are "two words"')
+  #   argv #=> ["here", "are", "two words"]
+  #
+  # String#shellsplit is a shortcut for this function.
+  #
+  #   argv = 'here are "two words"'.shellsplit
+  #   argv #=> ["here", "are", "two words"]
+  def shellsplit(line)
+    words = []
+    field = ''
+    line.scan(/\G\s*(?>([^\s\\\'\"]+)|'([^\']*)'|"((?:[^\"\\]|\\.)*)"|(\\.?)|(\S))(\s|\z)?/m) do
+      |word, sq, dq, esc, garbage, sep|
+      raise ArgumentError, "Unmatched double quote: #{line.inspect}" if garbage
+      field << (word || sq || (dq || esc).gsub(/\\(.)/, '\\1'))
+      if sep
+        words << field
+        field = ''
+      end
+    end
+    words
+  end
+
+  alias shellwords shellsplit
+
+  module_function :shellsplit, :shellwords
+
+  class << self
+    alias split shellsplit
+  end
+
+  # Escapes a string so that it can be safely used in a Bourne shell
+  # command line.  +str+ can be a non-string object that responds to
+  # +to_s+.
+  #
+  # Note that a resulted string should be used unquoted and is not
+  # intended for use in double quotes nor in single quotes.
+  #
+  #   argv = Shellwords.escape("It's better to give than to receive")
+  #   argv #=> "It\\'s\\ better\\ to\\ give\\ than\\ to\\ receive"
+  #
+  # String#shellescape is a shorthand for this function.
+  #
+  #   argv = "It's better to give than to receive".shellescape
+  #   argv #=> "It\\'s\\ better\\ to\\ give\\ than\\ to\\ receive"
+  #
+  #   # Search files in lib for method definitions
+  #   pattern = "^[ \t]*def "
+  #   open("| grep -Ern #{pattern.shellescape} lib") { |grep|
+  #     grep.each_line { |line|
+  #       file, lineno, matched_line = line.split(':', 3)
+  #       # ...
+  #     }
+  #   }
+  #
+  # It is the caller's responsibility to encode the string in the right
+  # encoding for the shell environment where this string is used.
+  #
+  # Multibyte characters are treated as multibyte characters, not as bytes.
+  #
+  # Returns an empty quoted String if +str+ has a length of zero.
+  def shellescape(str)
+    str = str.to_s
+
+    # An empty argument will be skipped, so return empty quotes.
+    return "''" if str.empty?
+
+    str = str.dup
+
+    # Treat multibyte characters as is.  It is the caller's responsibility
+    # to encode the string in the right encoding for the shell
+    # environment.
+    str.gsub!(/([^A-Za-z0-9_\-.,:\/@\n])/, "\\\\\\1")
+
+    # A LF cannot be escaped with a backslash because a backslash + LF
+    # combo is regarded as a line continuation and simply ignored.
+    str.gsub!(/\n/, "'\n'")
+
+    return str
+  end
+
+  module_function :shellescape
+
+  class << self
+    alias escape shellescape
+  end
+
+  # Builds a command line string from an argument list, +array+.
+  #
+  # All elements are joined into a single string with fields separated by a
+  # space, where each element is escaped for the Bourne shell and stringified
+  # using +to_s+.
+  #
+  #   ary = ["There's", "a", "time", "and", "place", "for", "everything"]
+  #   argv = Shellwords.join(ary)
+  #   argv #=> "There\\'s a time and place for everything"
+  #
+  # Array#shelljoin is a shortcut for this function.
+  #
+  #   ary = ["Don't", "rock", "the", "boat"]
+  #   argv = ary.shelljoin
+  #   argv #=> "Don\\'t rock the boat"
+  #
+  # You can also mix non-string objects in the elements as allowed in Array#join.
+  #
+  #   output = `#{['ps', '-p', $$].shelljoin}`
+  #
+  def shelljoin(array)
+    array.map { |arg| shellescape(arg) }.join(' ')
+  end
+
+  module_function :shelljoin
+
+  class << self
+    alias join shelljoin
+  end
+end
+
+class String
+  # call-seq:
+  #   str.shellsplit => array
+  #
+  # Splits +str+ into an array of tokens in the same way the UNIX
+  # Bourne shell does.
+  #
+  # See Shellwords.shellsplit for details.
+  def shellsplit
+    Shellwords.split(self)
+  end
+
+  # call-seq:
+  #   str.shellescape => string
+  #
+  # Escapes +str+ so that it can be safely used in a Bourne shell
+  # command line.
+  #
+  # See Shellwords.shellescape for details.
+  def shellescape
+    Shellwords.escape(self)
+  end
+end
+
+class Array
+  # call-seq:
+  #   array.shelljoin => string
+  #
+  # Builds a command line string from an argument list +array+ joining
+  # all elements escaped for the Bourne shell and separated by a space.
+  #
+  # See Shellwords.shelljoin for details.
+  def shelljoin
+    Shellwords.join(self)
+  end
+end