Changing buffering of stdout in Lua

[Steve Heller <steve@...>]

Apparently there is a problem with running C programs
that use stdout under Emacs: stdout is attached to a
pipe, which is a block device, rather than the
console, which is a character device. Thus, you don't
get your output until the program terminates or there
is enough data to fill the block buffer. Is there an
easy way to fix this for the Lua debugger (or other
program, of course)?

Thanks.