Windows, test wrapper: implement `tee` for HANDLEs

Implement a GNU coreutils tee(1)-inspired class
for HANDLEs. It copies data from an input HANDLE
to two output HANDLEs.

I will use this logic to redirect the stdout and
stderr of the test process to a log file and to
the test wrapper process' stdout. That is what
test-setup.sh also does.

See https://github.com/bazelbuild/bazel/issues/5508

Change-Id: I1882c1f0f4c1f5375e354849aef80acae73f28bb

Closes #6676.

Change-Id: I1882c1f0f4c1f5375e354849aef80acae73f28bb
PiperOrigin-RevId: 221584437
5 files changed
tree: da1209315f96328b8b231d35c6450e1175772ced
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. BUILD
  12. CHANGELOG.md
  13. CODEOWNERS
  14. combine_distfiles.py
  15. combine_distfiles_to_tar.sh
  16. compile.sh
  17. CONTRIBUTING.md
  18. CONTRIBUTORS
  19. distdir.bzl
  20. ISSUE_TEMPLATE.md
  21. LICENSE
  22. README.md
  23. WORKSPACE
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