From the Website:

popenhs is a popen-like library for Haskell. It provides a convenient way of
sending string input to a subprocess and reading output from it lazily. It
requires the Posix module and has been tested under ghc5 so far.

WWW: http://www.haskell.org/~petersen/haskell/popenhs/

- Oliver Braun
obraun@informatik.unibw-muenchen.de