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Go ConPTY

This library exposes the (Windows ConPTY API)[https://blogs.msdn.microsoft.com/commandline/2018/08/02/windows-command-line-introducing-the-windows-pseudo-console-conpty/] to golang. It was written by CircleCI.

Status

This library is not complete - there are two show-stopper bugs in it:

  1. On one test machine, the sample project successfully executes with a PTY less than 50% of the time. The failure is due to the process created with CreateProcessW launching, and immediately failing with exit code 0xc0000142.
  2. On another test machine, calls to CreatePseudoConsole returns ERROR_INSUFFICIENT_BUFFER on ever call.

To help debug these issues, there are many calls to printf and spew.

Architecture

This project is split into two library packages, and some sample commands:

  • pkg/pty: A golang package that exposes the ConPTY API.
  • pkg/system: A low level wrapper over the ConPTY Win32 API.
  • cmd/echocon.go: A port of the EchoCon.cpp sample to go, using this library.