luajit -v (return code: 0)
LuaJIT 2.0.4 -- Copyright (C) 2005-2015 Mike Pall. http://luajit.org/
luajit --help (return code: 1)
usage: luajit [options]... [script [args]...].
Available options are:
-e chunk Execute string 'chunk'.
-l name Require library 'name'.
-b ... Save or list bytecode.
-j cmd Perform LuaJIT control command.
-O[opt] Control LuaJIT optimizations.
-i Enter interactive mode after executing 'script'.
-v Show version information.
-E Ignore environment variables.
-- Stop handling options.
- Execute stdin and stop handling options.