On 2007-10-16, Jules Bean <[EMAIL PROTECTED]> wrote:
> John Goerzen wrote:
>> Many systems will just try to close *all* FDs except the ones they need
>> after a fork(). Another approach would be to maintain a global list of
>> FDs that the Haskell thread is using, and close all of them except the
>> pipe ends in the child.
>
>> Does this make sense to everyone? If so, I'll submit the bug on GHC.
>
> Yes, it does make sense.
>
> On POSIX systems it should suffice to just have haskell set
> CLOSE_ON_EXEC on all its fds except std{in,out,err} and special pipe
> fds, shouldn't it?
Do you mean FD_CLOEXEC, which can be set with fcntl()? If so, it's not
defined in POSIX according to the Linux manpage. I couldn't find
CLOSE_ON_EXEC in either open(2) or fcntl(2).
If FD_CLOEXEC is set in the Haskell process atomically, before anything
has a chance to fork off and use it, this would be an ideal solution on
platforms that support it.
-- John
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