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|
//! `rustix` provides efficient memory-safe and [I/O-safe] wrappers to
//! POSIX-like, Unix-like, Linux, and Winsock2 syscall-like APIs, with
//! configurable backends.
//!
//! With rustix, you can write code like this:
//!
//! ```rust
//! # #[cfg(feature = "net")]
//! # fn read(sock: std::net::TcpStream, buf: &mut [u8]) -> std::io::Result<()> {
//! # use rustix::net::RecvFlags;
//! let nread: usize = rustix::net::recv(&sock, buf, RecvFlags::PEEK)?;
//! # let _ = nread;
//! # Ok(())
//! # }
//! ```
//!
//! instead of like this:
//!
//! ```rust
//! # #[cfg(feature = "net")]
//! # fn read(sock: std::net::TcpStream, buf: &mut [u8]) -> std::io::Result<()> {
//! # use std::convert::TryInto;
//! # #[cfg(unix)]
//! # use std::os::unix::io::AsRawFd;
//! # #[cfg(target_os = "wasi")]
//! # use std::os::wasi::io::AsRawFd;
//! # #[cfg(windows)]
//! # use windows_sys::Win32::Networking::WinSock as libc;
//! # #[cfg(windows)]
//! # use std::os::windows::io::AsRawSocket;
//! # const MSG_PEEK: i32 = libc::MSG_PEEK;
//! let nread: usize = unsafe {
//! #[cfg(any(unix, target_os = "wasi"))]
//! let raw = sock.as_raw_fd();
//! #[cfg(windows)]
//! let raw = sock.as_raw_socket();
//! match libc::recv(
//! raw as _,
//! buf.as_mut_ptr().cast(),
//! buf.len().try_into().unwrap_or(i32::MAX as _),
//! MSG_PEEK,
//! ) {
//! -1 => return Err(std::io::Error::last_os_error()),
//! nread => nread as usize,
//! }
//! };
//! # let _ = nread;
//! # Ok(())
//! # }
//! ```
//!
//! rustix's APIs perform the following tasks:
//! - Error values are translated to [`Result`]s.
//! - Buffers are passed as Rust slices.
//! - Out-parameters are presented as return values.
//! - Path arguments use [`Arg`], so they accept any string type.
//! - File descriptors are passed and returned via [`AsFd`] and [`OwnedFd`]
//! instead of bare integers, ensuring I/O safety.
//! - Constants use `enum`s and [`bitflags`] types.
//! - Multiplexed functions (eg. `fcntl`, `ioctl`, etc.) are de-multiplexed.
//! - Variadic functions (eg. `openat`, etc.) are presented as non-variadic.
//! - Functions and types which need `l` prefixes or `64` suffixes to enable
//! large-file support are used automatically, and file sizes and offsets
//! are presented as `u64` and `i64`.
//! - Behaviors that depend on the sizes of C types like `long` are hidden.
//! - In some places, more human-friendly and less historical-accident names
//! are used (and documentation aliases are used so that the original names
//! can still be searched for).
//! - Provide y2038 compatibility, on platforms which support this.
//! - Correct selected platform bugs, such as behavioral differences when
//! running under seccomp.
//!
//! Things they don't do include:
//! - Detecting whether functions are supported at runtime.
//! - Hiding significant differences between platforms.
//! - Restricting ambient authorities.
//! - Imposing sandboxing features such as filesystem path or network address
//! sandboxing.
//!
//! See [`cap-std`], [`system-interface`], and [`io-streams`] for libraries
//! which do hide significant differences between platforms, and [`cap-std`]
//! which does perform sandboxing and restricts ambient authorities.
//!
//! [`cap-std`]: https://crates.io/crates/cap-std
//! [`system-interface`]: https://crates.io/crates/system-interface
//! [`io-streams`]: https://crates.io/crates/io-streams
//! [`getrandom`]: https://crates.io/crates/getrandom
//! [`bitflags`]: https://crates.io/crates/bitflags
//! [`AsFd`]: https://doc.rust-lang.org/stable/std/os/unix/io/trait.AsFd.html
//! [`OwnedFd`]: https://docs.rs/io-lifetimes/latest/io_lifetimes/struct.OwnedFd.html
//! [io-lifetimes crate]: https://crates.io/crates/io-lifetimes
//! [I/O-safe]: https://github.com/rust-lang/rfcs/blob/master/text/3128-io-safety.md
//! [`Result`]: https://docs.rs/rustix/latest/rustix/io/type.Result.html
//! [`Arg`]: https://docs.rs/rustix/latest/rustix/path/trait.Arg.html
#![deny(missing_docs)]
#![allow(stable_features)]
#![cfg_attr(linux_raw, deny(unsafe_code))]
#![cfg_attr(rustc_attrs, feature(rustc_attrs))]
#![cfg_attr(doc_cfg, feature(doc_cfg))]
#![cfg_attr(all(target_os = "wasi", feature = "std"), feature(wasi_ext))]
#![cfg_attr(
all(linux_raw, naked_functions, target_arch = "x86"),
feature(naked_functions)
)]
#![cfg_attr(io_lifetimes_use_std, feature(io_safety))]
#![cfg_attr(core_ffi_c, feature(core_ffi_c))]
#![cfg_attr(core_c_str, feature(core_c_str))]
#![cfg_attr(alloc_c_string, feature(alloc_ffi))]
#![cfg_attr(alloc_c_string, feature(alloc_c_string))]
#![cfg_attr(not(feature = "std"), no_std)]
#![cfg_attr(feature = "rustc-dep-of-std", feature(core_intrinsics))]
#![cfg_attr(feature = "rustc-dep-of-std", feature(ip))]
#![cfg_attr(
all(not(feature = "rustc-dep-of-std"), core_intrinsics),
feature(core_intrinsics)
)]
#![cfg_attr(asm_experimental_arch, feature(asm_experimental_arch))]
#![cfg_attr(not(feature = "all-apis"), allow(dead_code))]
#[cfg(not(feature = "rustc-dep-of-std"))]
extern crate alloc;
// Internal utilities.
#[cfg(not(windows))]
#[macro_use]
pub(crate) mod cstr;
#[macro_use]
pub(crate) mod const_assert;
pub(crate) mod utils;
// Pick the backend implementation to use.
#[cfg_attr(libc, path = "imp/libc/mod.rs")]
#[cfg_attr(linux_raw, path = "imp/linux_raw/mod.rs")]
#[cfg_attr(wasi, path = "imp/wasi/mod.rs")]
mod imp;
/// Export the `*Fd` types and traits that are used in rustix's public API.
///
/// Users can use this to avoid needing to import anything else to use the same
/// versions of these types and traits.
///
/// Rustix APIs that use `OwnedFd` use [`rustix::io::OwnedFd`] instead, which
/// allows rustix to implement `close` for them.
///
/// [`rustix::io::OwnedFd`]: crate::io::OwnedFd
pub mod fd {
use super::imp;
pub use imp::fd::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, OwnedFd, RawFd};
#[cfg(windows)]
pub use imp::fd::{AsSocket, FromSocket, IntoSocket};
#[cfg(feature = "std")]
pub use imp::fd::{FromFd, IntoFd};
}
// The public API modules.
#[cfg(not(windows))]
pub mod ffi;
#[cfg(not(windows))]
#[cfg(feature = "fs")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "fs")))]
pub mod fs;
pub mod io;
#[cfg(any(target_os = "android", target_os = "linux"))]
#[cfg(feature = "io_uring")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "io_uring")))]
pub mod io_uring;
#[cfg(not(any(windows, target_os = "wasi")))]
#[cfg(feature = "mm")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "mm")))]
pub mod mm;
#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
#[cfg(feature = "net")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "net")))]
pub mod net;
#[cfg(not(windows))]
#[cfg(feature = "param")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "param")))]
pub mod param;
#[cfg(not(windows))]
#[cfg(any(feature = "fs", feature = "net"))]
#[cfg_attr(doc_cfg, doc(cfg(any(feature = "fs", feature = "net"))))]
pub mod path;
#[cfg(not(windows))]
#[cfg(feature = "process")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "process")))]
pub mod process;
#[cfg(not(windows))]
#[cfg(feature = "rand")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "rand")))]
pub mod rand;
#[cfg(not(any(windows, target_os = "wasi")))]
#[cfg(feature = "termios")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "termios")))]
pub mod termios;
#[cfg(not(windows))]
#[cfg(feature = "thread")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "thread")))]
pub mod thread;
#[cfg(not(windows))]
#[cfg(feature = "time")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "time")))]
pub mod time;
// "runtime" is also a public API module, but it's only for libc-like users.
#[cfg(not(windows))]
#[cfg(feature = "runtime")]
#[doc(hidden)]
#[cfg_attr(doc_cfg, doc(cfg(feature = "runtime")))]
pub mod runtime;
// We have some internal interdependencies in the API features, so for now,
// for API features that aren't enabled, declare them as `pub(crate)` so
// that they're not public, but still available for internal use.
#[cfg(not(windows))]
#[cfg(not(feature = "fs"))]
pub(crate) mod fs;
#[cfg(not(windows))]
#[cfg(all(
not(feature = "param"),
any(feature = "runtime", feature = "time", target_arch = "x86"),
))]
pub(crate) mod param;
#[cfg(not(windows))]
#[cfg(not(any(feature = "fs", feature = "net")))]
pub(crate) mod path;
#[cfg(not(windows))]
#[cfg(not(feature = "process"))]
pub(crate) mod process;
|
