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Hi all, This started in 1.7.10 and I thought this may be fixed in 1.7.12 due to emails in the mailing list: http://sourceware.org/ml/cygwin/2012-03/msg00666.html But there still seems to be a problem piping from a .net console application to a visual c++ console application. Using the following simple C# program complied using "csc /optimize /target:exe /out:./consoleout.exe Program.cs" >>>> Begin Program.cs namespace consoleout { using System; internal static class Program { private static void Main(string[] args) { foreach (var arg in args) { Console.Out.WriteLine(arg); } } } } <<<< End Program.cs I can use this to output to cygwin exes OK $ ./consoleout.exe Hello There | cat Hello There $ ./consoleout.exe Hello There | grep ll 1:Hello $ I also created a visual c++ executable like the simple one below compiled with "cl /EHs readin.cxx /link" >>>> Begin readin.cxx #include <string> #include <iostream> int main(int argc, char** argv) { static_cast<void>(argc); static_cast<void>(argv); std::string buf; buf.reserve(1024); while (std::getline(std::cin, buf, '\n')) { std::cout << buf << '\n'; } return EXIT_SUCCESS; } <<<< End readin.cxx I can use this to output anything read in $ echo Hello | ./readin.exe Hello $ cat 'readin.cxx' | ./readin.exe #include <string> #include <iostream> int main(int argc, char** argv) { static_cast<void>(argc); static_cast<void>(argv); std::string buf; buf.reserve(1024); while (std::getline(std::cin, buf, '\n')) { std::cout << buf << '\n'; } return EXIT_SUCCESS; } $ But when combining the two, nothing happens. $ ./consoleout.exe Hello There | ./readin.exe $ It "seems" as though the console out from the .net is not being correctly piped through to a vc++ program. I know that is a strange defect given all the other combinations work. The reverse works i.e. output from a visual c++ console application is piped correctly to a .net console application. This worked prior to 1.7.10 (1.7.9 and before). I am sorry that I cannot point to an area in the Cygwin code or suggest a fix, but I am hoping this is enough of a description to help someone find out what the issue is. Thanks for your time, Alan
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