validate_permissions

# File lib/rubygems/specification.rb, line 2995
  def validate_permissions
    return if Gem.win_platform?

    files.each do |file|
      next unless File.file?(file)
      next if File.stat(file).mode & 0444 == 0444
      warning "#{file} is not world-readable"
    end

    executables.each do |name|
      exec = File.join @bindir, name
      next unless File.file?(exec)
      next if File.stat(exec).executable?
      warning "#{exec} is not executable"
    end
  end