Which stream does gRPC log to?

[Paulin Todev]

Hi,

I've been trying to save the gRPC output to a log file when using GRPC_TRACE and GRPC_VERBOSITY, but I'm not sure how to pick it up. I use C++ on Windows:

• When I run my application from cmd, I see the gRPC output
• When I start it from the Visual Studio debugger I don't see it in the console output. I also don't see it in the Output tab in Visual Studio.

So I was just wondering if someone could clarify to which output stream the gRPC log goes please? It doesn't seem to be normal cout; is it a cerr or a clog?

Regards,

Paulin

[yas...@google.com]

This is how logging is implemented for windows - https://github.com/grpc/grpc/blob/8c142a1d8c66a25598151bf154655da9288ffa5a/src/core/lib/gpr/log_windows.cc#L95

[Paulin Todev]

Thank you, that was helpful.

In case anyone reading this in the future has the same problem - I solved mine by using gpr_set_log_function() in the log.h file:
https://grpc.github.io/grpc/cpp/impl_2codegen_2log_8h.html#ae437062e3540eeebb4c95f119fe56be5