Well, good call. I shouldn't have jumped to conclusions. Both my C++ and C#
examples still fail:
$ echo `./HelloCPP` ; echo `./HelloCS`
JamesJ@JTJDEVTOOLS /cygdrive/c/Users/JamesJ/Desktop
$
I guess maybe it is a different bug. I can provide binaries for these files if
desired, but realistically I think anyone can compile it in MinGW, Visual C++,
etc. using the C source code I posted earlier, for example. This was using an
up-to-date Cygwin, and I replaced the C:\cygwin\bin\cygwin1.dll with the one
from the development snapshot from 3/10/2012.
Here is the source code for HelloCS program, compiled with Visual C# 2008 SP1:
class Program { static void Main(string[] args) {
System.Console.Write("Hello"); } }
And again, here's the source code for HelloCPP program, compiled with Visual
C++ 2008 SP1:
#include <windows.h>
int main()
{
char * test = "AB";
DWORD written;
// Get standard output file handle
HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE);
// Do a null write. This breaks Cygwin when output is redirected.
WriteFile(h, test, 0, &written, NULL);
// Print an "A" and a "B" in two write operations
WriteFile(h, test, 1, &written, NULL);
WriteFile(h, test+1, 1, &written, NULL);
return 0;
}
Obviously, neither of these binaries were linked against any Cygwin
libraries... they are just straight 100% Win32 programs... The benefit of the
C version is that it removes the rest of .NET from the test...
Best regards,
James Johnston
-----Original Message-----
Sent: Monday, March 12, 2012 14:19
Subject: Re: Can't reliably redirect standard output from C# program in recent
Cygwin
On Mar 12 14:05, James Johnston wrote:
> You're partially correct, depending on how you look at it... As I
> wrote earlier, I reproduced it with a straight Win32 program, too - by
> doing a null write that every C# program would do. So I guess it's
> not specific to C#, since C++ programs can cause it too. But every C#
> program would normally do this activity since the runtime always does
> the null write - so in that sense, I guess it is somewhat specific to C#.
>
> Thanks all, good to know it should be fixed. :)
Better test it. Please try the latest developer snapshot from
http://cygwin.com/snapshots/
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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