On Thu, Jun 9, 2011 at 16:40, Donn Cave <d...@avvanta.com> wrote: > Quoth Erik Hesselink <hessel...@gmail.com>, >> On Thu, Jun 9, 2011 at 13:40, Neil Davies <semanticphilosop...@gmail.com> >> wrote: >>> Anyone out there got an elegant solution to being able to fork a haskell >>> thread and replace its 'stdin' ? >> >> If you don't mind being tied to GHC you can use hDuplicateTo from >> GHC.IO.Handle [1]. You can also use dupTo from the unix package [2], >> but that ties you to unix-like platforms instead. > > From reading about it, I would expect hDuplicate to to close and > replace the input file descriptor for _all_ threads. > > Processes are of course the elegant way to separate effects like this.
Ah yes, you are right. I've done this before, but that was after a double fork using 'forkProcess'. Erik _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
