Proposal: add createPipe to base

Michael Snoyman michael at snoyman.com
Mon Mar 10 12:32:06 UTC 2014


On Mon, Mar 10, 2014 at 2:30 PM, Johan Tibell <johan.tibell at gmail.com>wrote:

> I've written a cross-platform* implementation of the pipe() syscall,
> currently for use within Cabal:
>
> createPipe :: IO (Handle, Handle)
>
> https://github.com/haskell/cabal/blob/master/Cabal/tests/Distribution/Compat/CreatePipe.hsc
>
> It's a bit of a shame to leave it in Cabal as it's generally useful.
>
> I propose we add it to System.IO. Note that we'd have to copy the 5 lines
> in System.Posix.IO.createPipe into base as the above implementation would
> otherwise depend on the unix package.
>
> Discussion period: 3 weeks.
>
> * Only tested on OS X, Windows, and Linux.
>
>
+1. I've needed this in the past when working with process, and ended up
writing POSIX-only code as a result.
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