# File shell.rb, line 223
  def Shell.alias_command(ali, command, *opts, &block)
    CommandProcessor.alias_command(ali, command, *opts, &block)
  end

# File shell.rb, line 48
    def cd(path)
      sh = new
      sh.cd path
      sh
    end

# File shell.rb, line 43
    def debug=(val)
      @debug = val
      @verbose = val if val
    end

# File shell.rb, line 215
  def Shell.def_system_command(command, path = command)
    CommandProcessor.def_system_command(command, path)
  end

# File shell.rb, line 66
    def default_record_separator
      if @default_record_separator
        @default_record_separator
      else
        $/
      end
    end

# File shell.rb, line 74
    def default_record_separator=(rs)
      @default_record_separator = rs
    end

# File shell.rb, line 54
    def default_system_path
      if @default_system_path
        @default_system_path
      else
        ENV["PATH"].split(":")
      end
    end

# File shell.rb, line 62
    def default_system_path=(path)
      @default_system_path = path
    end

# File shell.rb, line 231
  def Shell.install_system_commands(pre = "sys_")
    CommandProcessor.install_system_commands(pre)
  end

# File shell.rb, line 79
  def initialize
    @cwd = Dir.pwd
    @dir_stack = []
    @umask = nil

    @system_path = Shell.default_system_path
    @record_separator = Shell.default_record_separator

    @command_processor = CommandProcessor.new(self)
    @process_controller = ProcessController.new(self)

    @verbose = Shell.verbose
    @debug = Shell.debug
  end

# File shell.rb, line 244
  def self.notify(*opts, &block)
    Thread.exclusive do
    if opts[-1].kind_of?(String)
      yorn = verbose?
    else
      yorn = opts.pop
    end
    return unless yorn

    _head = true
    print opts.collect{|mes|
      mes = mes.dup
      yield mes if iterator?
      if _head
        _head = false
        "shell: " + mes
      else
        "       " + mes
      end
    }.join("\n")+"\n"
    end
  end

# File shell.rb, line 227
  def Shell.unalias_command(ali)
    CommandProcessor.unalias_command(ali)
  end

# File shell.rb, line 219
  def Shell.undef_system_command(command)
    CommandProcessor.undef_system_command(command)
  end

# File shell.rb, line 144
  def chdir(path = nil)
    if iterator?
      cwd_old = @cwd
      begin
        chdir(path)
        yield
      ensure
        chdir(cwd_old)
      end
    else
      path = "~" unless path
      @cwd = expand_path(path)
      notify "current dir: #{@cwd}"
      rehash
      self
    end
  end

# File shell.rb, line 107
  def debug=(val)
    @debug = val
    @verbose = val if val
  end

# File shell.rb, line 118
  def expand_path(path)
    File.expand_path(path, @cwd)
  end

# File shell.rb, line 236
  def inspect
    if debug.kind_of?(Integer) && debug > 2
      super
    else
      to_s
    end
  end

# File shell.rb, line 204
  def jobs
    @process_controller.jobs
  end

# File shell.rb, line 208
  def kill(sig, command)
    @process_controller.kill_job(sig, command)
  end

# File shell.rb, line 189
  def popdir
    if pop = @dir_stack.pop
      chdir pop
      notify "dir stack: [#{@dir_stack.join ', '}]"
      self
    else
      Shell.Fail DirStackEmpty
    end
  end

# File shell.rb, line 163
  def pushdir(path = nil)
    if iterator?
      pushdir(path)
      begin
        yield
      ensure
        popdir
      end
    elsif path
      @dir_stack.push @cwd
      chdir path
      notify "dir stack: [#{@dir_stack.join ', '}]"
      self
    else
      if pop = @dir_stack.pop
        @dir_stack.push @cwd
        chdir pop
        notify "dir stack: [#{@dir_stack.join ', '}]"
        self
      else
        Shell.Fail DirStackEmpty
      end
    end
  end

# File shell.rb, line 96
  def system_path=(path)
    @system_path = path
    rehash
  end