system-interface

system-interface adds extensions to the Rust standard library, seeking to stay within the style of [std], while exposing additional functionality:

• [fs::FileIoExt] - Extra support for working with files, including all the features of [std::io::Read], [std::io::Write], [std::io::Seek], and [std::os::unix::fs::FileExt], but with both POSIX-ish and Windows support, and with additional features, including read and write with all combinations of _vectored, _at, and _exact/_all. If you've ever wanted something like [read_exact_vectored_at], [write_all_vectored_at], or any other combination, or even [read_to_end_at] or [read_to_string_at], they're all here, and they work on Windows too!
• [io::IsTerminal] - Test whether a given I/O handle refers to a terminal (aka a tty).
• [io::ReadReady] - Query the number of bytes ready to be read immediately from an I/O handle.
• [io::Peek] - Read from an I/O handle without consuming the data.

Everything in this crate is portable across popular POSIX-ish platforms and Windows.

Many of system-interface's features correspond to features in [WASI], and are designed to work with [cap-std], however it's not specific to WASI and can be used with regular [std] too. To separate concerns, all sandboxing and capability-oriented APIs are left to cap-std, so this crate's features are usable independently.

Support for async-std and socket2 is temporarily disabled until those crates contain the needed implementations of the I/O safety traits.