Hi,

> Hi Mads,
> 
> thanks a lot for your reply. I wasn't subscribed to wxhaskell-develop 
> yet so I only today realized you answered my posting.
> 
> I applied your supposal on my Windows machine with the following 
> results: wxExecProcess now indeed yields output on stderr, but output on 
> both stdout and stderr are somewhat incomplete (with no change when 
> setting output buffering in processtest.exe to NoBuffering):
> 
> display on stdout frame:
> 
> Stdout: 100: Info
> 98: Info
> 96: Info
> 94: Info
> 92: Info
> 90: Info
> 88: Info
> 86: Info
> 84: Info
> 82: Info
> Stdout:
> 80: Info
> 78: Info
> ...
> 
> and on stderr frame:
> 
> Stderr: 99: Error
> 97: Error
> 95: Error
> 93: Error
> 91: Error
> 89: Error
> 87: Error
> 85: ErroStderr: r
> 83: Error
> ...
> 
> That is, the first 8 bytes (Stdout: / Stderr: ) are most of the time 
> vanished. Whereas processExecAsyncTimed yields the correct output (of 
> course only on stdout):
> 
> Stdout: 100: Info
> Stdout: 98: Info
> Stdout: 96: Info
> Stdout: 94: Info
> ...
> 
> Do you have any idea? (Before starting to delve deep into the process 
> management myself...)

Nope, I have no idea why it do not work for you - sorry :(

/Mads Lindstrøm

> 
> Thanks again,
> Bernd
> 
> > Hi Bernd
> > 
> > Bernd Holzmüller wrote:
> >> Hi all,
> >>
> >> I am developing a test management GUI where processes are started and
> >> their output (on stdout and stderr) are shown on corresponding console
> >> windows. The process management worked quite OK with version 0.9.4 but
> >> does no longer work in version 0.10.3 (using ghc 6.8.3 on Windows XP).
> >>
> >> The attached small example application shows what happens: with
> >> processExecAsync only garbage is shown on both the stdout and the stderr
> >> console window, with processExecAsyncTimed the stdout console works
> >> fine, but the stderr console shows nothing. Main.hs is the wxHaskell GUI
> >> with two buttons, both calling the application compiled from
> >> Testproc.hs, one using processExecAsync, one using the Timed variant.
> >> The attached makefile builds everything.
> >>
> >> If someone with understanding of the internals of wxHaskell could have a
> >> look on this topic, I would be very grateful. Perhaps the (soon?) coming
> >> new wxHaskell version 0.11 will do correctly?
> >>
> >> Thanks,
> >> Bernd
> >>
> > 
> > Your processExecAsyncTimed example works on Linux. But of cause that do
> > not help you much. The processExecAsync example do not work on Linux
> > either.
> > 
> > A while ago I got tired of the hard-to-get-to-work nature of
> > processExecAsyncTimed and therefore wrote my own process executor. I
> > have attached my own process executor and an adapted version of your
> > code, which works for me (on Linux). You will have to adapt it a little
> > bit to work on windows (properly just changing "./testproc.exe" to
> > "testproc" should do).
> > 
> > I would love to hear if it works on your machine.
> > 
> > 
> > Greetings,
> > 
> > Mads Lindstrøm
> 
> 
> 
> 
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