In local.glasgow-haskell-bugs, you wrote:
> I've stripped down my program to produce an example. In the process, the
> problem disappeard a few times. I hope it shows up on your machine. The
> attached files reproduce it on my machine, but the exact results vary
> from run to run.
There's no bug in the libraries:
The data is read lazily by 'getContents', then you invoke 'forkProcess'.
>From this moment on, you should have two (heavy-weight) processes competing
for input from the same source (stdin).
Further proof might be that in making 'getContents' strict by inserting
a 'print' statement to force evaluation now returns correct results:
..
qinh <- getContents
let pfade = zeilen qinh
print pfade -- FORCE EVALUATION
mapM_ (\pfad -> run "/bin/echo" [pfad]) pfade
..
Notice that a 'hSetBuffering stdin NoBuffering' before 'getContents'
doesn't seem to be sufficient, either.
Regards,
Volker
--
Wonderful \hbox (0.80312pt too nice) in paragraph at lines 16--18
Volker Stolz * [EMAIL PROTECTED]
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