[zxcrypt] Isolate tests from system device manager

To improve testability, zxcrypt's FdioVolume now requires the injection
of an FD representing the root of the devfs tree.  This is needed to be
able to interact with the multiple device drivers that comprise the
zxcrypt system in an isolated devmgr instance.

Since some of the zxcrypt tests also exercise FVM, it was necessary to
add similar devfs-root-relative API to FVM.  I shied away from
converting all of FVM to using only devfs-root-relative paths myself.
It's possible to do, but winds up needing fairly broad changes across
everything that interacts with filesystems and lots of changes to other
tests that currently rely on using the systemwide /dev.

ZX-3430 #done
FLK-226 #done
FLK-235 #done

Change-Id: I0c18dbf3f8c324cbdaf61e7aeedeef027129f4cf
12 files changed
tree: f256fa7f33d244178955ba0773d50b11f23df68f
  1. boards/
  2. build/
  3. buildtools/
  4. bundles/
  5. docs/
  6. examples/
  7. garnet/
  8. infra/
  9. peridot/
  10. products/
  11. scripts/
  12. sdk/
  13. src/
  14. third_party/
  15. tools/
  16. zircon/
  17. .clang-format
  18. .clang-tidy
  19. .dir-locals.el
  20. .gitattributes
  21. .gitignore
  22. .gn
  23. AUTHORS
  24. BUILD.gn
  25. CODE_OF_CONDUCT.md
  26. CONTRIBUTING.md
  27. LICENSE
  28. OWNERS
  29. PATENTS
  30. README.md
  31. rustfmt.toml
README.md

Fuchsia

Pink + Purple == Fuchsia (a new operating system)

What is Fuchsia?

Fuchsia is a modular, capability-based operating system. Fuchsia runs on modern 64-bit Intel and ARM processors.

Fuchsia is an open source project with a code of conduct that we expect everyone who interacts with the project to respect.

How can I build and run Fuchsia?

See Getting Started.

Where can I learn more about Fuchsia?

See the documentation.