Posix library ,Concurrent Haskell and Haskell IO sub-system

[Volker Stolz]

In local.glasgow-haskell-users, you wrote:
> I use the Posix library since I have to communicate via a pipe with
> another UNIX process.
> 
> Therefore I have to use
> fdRead :: Fd -> ByteCount -> IO (String,ByteCount)

Why do you "have to" use an Fd? A regular handle should be sufficient.
Where do you get the Fd from? Did you consider lifting the Fd back
to a Handle? If you really need to read exactly ByteCount bytes, you could
go the hard way and set the handle to unbuffered IO and call hGetChar
n times.
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rage against the finite state machine