[Haskell-cafe] executeFile failing on macosx

[David Powell]

Indeed System.Process does work for me.  I had avoided it because it is a
little more awkward to use it when you want the actual PIDs.  I don't
understand why System.Process.runProcess works for me, but executeFile does
not.  I did find this issue (for python)
http://bugs.python.org/issue6800which I think is the same thing I'm
hitting and they also claim it is fixed
in macosx 10.6.

Anyway, I'll work with System.Process for now.  Thanks for your help.

-- David

On Mon, May 17, 2010 at 9:41 AM, Thomas Schilling
<nominolo at googlemail.com>wrote:

> Works fine on 10.6.3.  If you run with +RTS -N2, though, you'll get
> "forking not supported with +RTS -N<n> greater than 1"
>
> The reason for this is that forking won't copy over the threads which
> means that the Haskell IO manager stops working (you'd have to somehow
> reinitialise the RTS while leaving heap and runtime stacks in tact --
> very tricky).
>
> I'm using http://hackage.haskell.org/package/process to run external
> processes.  I haven't had any problems with it.
>
> On 17 May 2010 00:06, David Powell <david at drp.id.au> wrote:
> >
> > On Mon, May 17, 2010 at 1:33 AM, Bulat Ziganshin <
> bulat.ziganshin at gmail.com>
> > wrote:
> >>
> >> Hello David,
> >>
> >> Sunday, May 16, 2010, 7:18:29 PM, you wrote:
> >>
> >> > "executeFile" is failing for me on Mac OS X 10.5.8, with ghc 6.12.1
> >> > when compiling with "-threaded".  Compiling without -threaded, or
> >> > running on linux is fine.
> >> >>  forkProcess $ executeFile "/bin/echo" False ["Ok"] Nothing
> >>
> >> afair, forkProcess and -threaded shouldn't work together on any Unix.
> >> can you try forkIO or forkOS instead?
> >>
> >
> > Hi Bulat,
> >
> > Both, forkIO and forkOS fail in the same way for me with -threaded.  I
> > believe this is because macosx requires the process to only have a single
> > thread when doing an execv(), which I thought was the purpose of
> > forkProcess?
> >
> > Cheers,
> >
> > -- David
> >
> > _______________________________________________
> > Haskell-Cafe mailing list
> > Haskell-Cafe at haskell.org
> > http://www.haskell.org/mailman/listinfo/haskell-cafe
> >
> >
>
>
>
> --
> Push the envelope.  Watch it bend.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.haskell.org/pipermail/haskell-cafe/attachments/20100516/00576458/attachment.html