[Haskell-beginners] Named Pipes Et Cetera

Magnus Therning magnus at therning.org
Tue Nov 23 09:14:41 EST 2010

On Tue, Nov 23, 2010 at 12:55, matthew coolbeth <mac01021 at engr.uconn.edu> wrote:
> Hello, all.
> Three questions:
> 1> What, if anything, can I do in a Haskell program to do blocking
> reads from a Linux FIFO?  For the curious, there is a small program
> below that doesn't block, but immediately terminates because of an EOF
> 2> How could I have found the answer to this question on my own? (The
> documentation that Google found for me was not completely adequate)
> 3> Is this sort of question generally regarded as too unixy or not
> haskelly enough to be appropriate for this mailing list?

The behaviour is as expected from reading the documentation on
hGetLine (http://hackage.haskell.org/packages/archive/haskell98/latest/doc/html/IO.html#v:hGetLine).
 The same seems to be true for all functions in IO, so I suspect
you'll have to go down to a lower level where you have more control
over this behaviour, e.g. by using th fd* functions in


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