lib/std/Build/Step.zig     |  47 +++++++++----
 lib/std/Io.zig             |  36 +++++++++-
 lib/std/Io/File.zig        |   8 ++-
 lib/std/Io/File/Reader.zig |   4 +-
 lib/std/Io/Reader.zig      |  21 ++++++
 lib/std/Io/Threaded.zig    |  87 ++++++++++++++++++++++-
 lib/std/process.zig        |  23 +++++--
 lib/std/process/Child.zig  | 118 +++++++++++++++++++-------------
 8 files changed, 272 insertions(+), 72 deletions(-)