Hello!
A few months ago, I started a discussion about how to extract the file
descriptor of a handle, without the side effect of closing the handle. Bas van
Dijk kindly provided the following function:
unsafeWithHandleFd :: Handle - (Fd - IO a) - IO a
(The action in the second argument is
Hi
This is an addition to my previous post.
This modified version of main seems to work:
main = do
fd - unsafeWithHandleFd stdin return
putStrLn (stdin: fd = ++ show fd)
fd - unsafeWithHandleFd stdout return
putStrLn (stdout: fd = ++ show fd)
The way I understand it,
Can you use 'dup' to copy the file descriptor and return that version?
That will keep a reference to the file even if haskell closes the
original descriptor.
John
On Sat, Mar 10, 2012 at 5:31 PM, Volker Wysk p...@volker-wysk.de wrote:
Hi
This is an addition to my previous post.
This
