-- public domain 20080407 lua@ztact.com


require 'luashell'
luashell.setfenv ()    -- magically create functions from $PATH


do

  local foo=bar

          -- echo is a builtin function
          -- note that environment and local variables can be accessed via $
  echo 'local variable foo is $foo'
  echo 'PATH is $PATH'

  cd '$HOME'    -- cd is also a builtin function

          -- the ls function is dynamically created when called
	  -- the ls function will fork and exec /bin/ls
  ls ()
  ls '-la --sort=size'
  ls ('-la', '--sort=size')

          -- similarly, any non-existent function that matches a program
	  -- in $PATH will also be magically created when called
  tar '--help'
  end