On 14 October 2004 13:06, Benedict Kavanagh wrote:

Writing some system code. Want to do it in Haskell. As a head start boost does anybody have any code that

uses forkprocess to fork, creates a pipe between parent/child and dups child's end to be standard out for the child and then have the parent do something based on something the child says.

I'll just go ahead and write it but I was wondering how integrated IO() stuff is with low level file calls. An example would help.

Anyone got any code that I could look at? Is there any code in any library or other code that does this kind of stuff?

The new System.Process library does the setting up of pipes and forking business for you, all behind a portable API. It'll be in GHC 6.4, but there's a version here which might work for you with GHC 6.2.2: http://www.haskell.org/~simonmar/process/process.tar.gz Cheers, Simon