# File lib/childprocess.rb, line 64 def os @os ||= ( require "rbconfig" host_os = RbConfig::CONFIG['host_os'] case host_os when /mswin|msys|mingw32|cygwin/ :windows when /darwin|mac os/ :macosx when /linux/ :linux when /solaris|bsd/ :unix else raise Error, "unknown os: #{host_os.inspect}" end ) end