lib/std/fs.zig              | 177 +++++++++++++++++++---
 lib/std/fs/test.zig         |  70 +++++++++
 lib/std/os.zig              |  61 ++++----
 lib/std/os/test.zig         |  45 +++++-
 lib/std/os/windows.zig      | 258 ++++++++++++++++++++++++++++++--
 lib/std/os/windows/bits.zig |  33 +++-
 lib/std/zig/system.zig      |   6 +
 7 files changed, 581 insertions(+), 69 deletions(-)