7 Jan
2010
7 Jan
'10
2:44 p.m.
On Thu, Jan 7, 2010 at 5:18 PM, Bulat Ziganshin
Hello Bas,
Thursday, January 7, 2010, 6:25:34 PM, you wrote:
So now I'm confused... are these standard file handles always open on program startup or are there abnormal situations when they are closed?
afaik, parent process may close them before executing your program, it's used in particular for running daemons
Thanks Bulat for explaining. Then I think the standard handles should have a type that at least encodes that they may be closed as in: stdin ∷ MonadCatchIO pr ⇒ RegionT s pr (Maybe (RegionalFileHandle R (RegionT s pr))) where Nothing means that the standard handle is closed. However this still leaves open problem 1, 2 and 3. Thanks, Bas