On Fri, Jan 13, 2012 at 04:34:37PM +0100, Chadda?? Fouch?? wrote:

On Thu, Jan 12, 2012 at 7:53 PM, Serge D. Mechveliani wrote:

...

[..] I need to organize a  string interface  for a Haskell function Main.axiom  and a C program                            fifoFromA.c

via a pair of  named pipes  (in Linux, UNIX). The pipes are created before running, by the commands   > mkfifo toA                                                        > mkfifo fromA

Main.axiom  outputs a  string  to  toA  and inputs the respond string                                            from  fromA  as the result. fifoFromA  inputs a string from  toA,           converts it to the string  resStr,  outputs resStr to  fromA.

Now that seems interesting, but just to be clear : did you choose this solution (and why won't you use the FFI instead) or is this just to see how to work it out ?

I am trying to interface my large DoCon program for algebra to (a much larger algebra program) Axiom (the FriCAS license allows this). And for many reasons, there is no real way for this except the string interface. Further, the first candidate for the string interface is Unix named pipes. If the GHC IO cannot sufficiently work with named pipes, I would return to the attempt with the Foreign Function Interface and C <-> C exchange. Sergei. mechvel@botik.ru