lua50 -version (return code: 0)
Lua 5.0.3 Copyright (C) 1994-2006 Tecgraf, PUC-Rio
lua50 --help (return code: 1)
usage: lua50 [options] [script [args]].
Available options are:
- execute stdin as a file
-e stat execute string `stat'
-i enter interactive mode after executing `script'
-l name load and run library `name'
-v show version information
-P suppress the setting of LUA_PATH. If not specified
very early, this setting may not take effect.
-- stop handling options