>On 2012-04-19 16:14, Christopher Faylor wrote: >> On Thu, Apr 19, 2012 at 12:56:33PM +0100, somebody wrote: >>> 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. >> >> Sorry but I'm not going to set up a .NET development environment to >> figure out a problem. If someone else wants to provide a clue as >> to what's going on, I'd appreciate it. > > I'll bite, and it WJFFM... > > $ ./consoleout hello world | ./readin > hello > world > $ uname -a > CYGWIN_NT-6.1-WOW64 PEDA-PC 1.7.13(0.260/5/3) 2012-04-05 12:43 i686 Cygwin> > > To stress it a tiny bit more: > $ ./consoleout hello world | ./readin | ./readin | ./readin | ./readin > hello > world > $ ./consoleout hello world | ./readin | ./readin | grep rl | ./readin | > ./readin > world > > Question for the OP: Does the pipe work from a cmd prompt? > > Cheers, > Peter
Strange, I am using mintty and tcsh. It also fails for me in cmd/bash, cmd/tcsh, mintty/bash. It does work with straight forward cmd prompt, no cygwin shells. I am using 32bit windows 7 though, not sure if that helps. $ uname -a CYGWIN_NT-6.1 F1N6LQ1 1.7.13(0.260/5/3) 2012-04-05 12:43 i686 Cygwin Perhaps a little bit more about development environment? Using VS2010 C# 4.0 (VS2008 fails to work as well using C# 3.0 and C# 2.0) OK, while writing this I did test this on a 64bit windows and I get the same result, no output from readin. My original post has the cygcheck output, is there any major difference between your configuration and mine there? I am more than happy to try out various options that might fix or even help work out what is going on. Alan -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
