lib/std/Io.zig                            |  1 +
 lib/std/Io/Threaded.zig                   | 74 ++++++++++++++++++++++++--
 lib/std/os/windows.zig                    | 34 ------------
 lib/std/posix.zig                         | 21 ++------
 lib/std/process.zig                       | 25 +++++++++
 lib/std/testing.zig                       |  1 +
 test/standalone/posix/cwd.zig             | 72 ++++++++++++++++++++-----
 test/standalone/posix/relpaths.zig        | 91 ++++++++++++++++++++------------
 test/standalone/windows_bat_args/fuzz.zig |  4 +-
 test/standalone/windows_bat_args/test.zig |  4 +-
 test/standalone/windows_spawn/main.zig    |  6 +--
 tools/fetch_them_macos_headers.zig        | 12 ++---
 12 files changed, 229 insertions(+), 116 deletions(-)