On Fri, Aug 31, 2007 at 11:31:38AM +0200, Andrea Rossato wrote:
Thanks for your kind attention, but I don't think it's a matter of buffering (I indeed tried playing with hSetBuffering with no results).
That is because you need to change output buffering on both ends. I don't know about haskell, but stdio says that handles to tty's are line-buffered, stderr is not buffered and all other handles are fully buffered. Of course you can flush the handles instead.
Basically I'd like to write the equivalent of "expect", which talks to interactive programs (with the difference the mine is supposed to talk to a program I wrote, so I don't need to embed a domain specific language in it).
AFAIR expect uses pseudo-ttys (ptys) because in general one can't force a program to change it's output buffering mode, so forcing it to talk to a pair of terminals instead of fifos is used as a workaround. Have a look at pty(7). Cheers, -- Krzysztof Kościuszkiewicz Skype: dr.vee, Gadu: 111851, Jabber: kokr@jabberpl.org Mobile IRL: +353851383329, Mobile PL: +48783303040 "Simplicity is the ultimate sophistication" -- Leonardo da Vinci