On 9/9/06, Eric Y. Kow <[EMAIL PROTECTED]> wrote:
On Sat, Sep 09, 2006 at 22:10:14 +0200, Tommy Pettersson wrote:
> Anyway, I had some difficulty reading the code (most of the code
> in Exec.lhs), so I tried to make it more readable, which (for me
> at least) means more simple. So I only kept one version of exec (the
> fancy one, but with the name exec), and used the redirection data type
> all the way. This is merely a suggestion, for now -- "easy to read" is
> very subjective.
I think this is an improvement. Thanks!
> I have changed the
> Windows code too, but have not tried to compile it since I don't
> have Windows.
I have a trick for that. I just set #define WIN32 (after recording
the patch so I can easily revert it)
Alright, so this patch is waiting for two things
1) Eric - find Juliusz's message re: stderr redirection
(I assume it's not the message where he accepted my patch)
I would be happy for stderr to NOT be redirected by
default, but just want to double-check the arguments,
just to be conservative and avoid changing behaviour
unless necessary.
2) A windows user - confirmation or denial
Windows automatically redirects stderr when stdout is redirected,
unless stderr is explicitly redirected somewhere.
(That sounds like a silly behaviour!)
I just used a program:
-----------------
import System.IO
main :: IO ()
main = do hPutStrLn stdout "writing to stdout..."
hFlush stdout
hPutStrLn stderr "writing to stderr..."
hFlush stderr
------------------
And generated the following:
H:\>main.exe
writing to stdout...
writing to stderr...
H:\>main.exe > out.txt
writing to stderr...
H:\>type out.txt
writing to stdout...
H:\>main.exe 2> out2.txt
writing to stdout...
H:\>type out2.txt
writing to stderr...
H:\>main.exe 2>>&1 > out3.txt
writing to stderr...
So from my 2 minute expirement I see it's possible to redirect them
separately but I don't understand how to redirect them at the same
time.
HTH,
Jason
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