Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 2413 insertions, 0 deletions

diff --git a/third_party/rust/wasi/src/lib.rs b/third_party/rust/wasi/src/lib.rs
new file mode 100644
index 0000000000..0df207b60e
--- /dev/null
+++ b/third_party/rust/wasi/src/lib.rs
@@ -0,0 +1,47 @@
+//! Raw API bindings to the WebAssembly System Interface (WASI)
+//!
+//! This crate provides Rust API bindings to WASI APIs. All WASI APIs are
+//! exported from this crate and provided with the appropriate type signatures.
+//! This crate is entirely procedurally generated from the `*.witx` files that
+//! describe the WASI API.
+//!
+//! # WASI API Version
+//!
+//! The WASI API is evolving over time. It is both gaining new features as well
+//! as tweaking the ABI of existing features. As a result it's important to
+//! understand what version of this crate you're using and how it relates to
+//! the WASI version of the spec.
+//!
+//! The WASI specification is organized into phases where there is a snapshot
+//! at any one point in time describing the current state of the specification.
+//! This crate implements a particular snapshot. You can find the snapshot
+//! version implemented in this crate in the build metadata of the crate
+//! version number. For example something like `0.9.0+wasi-snapshot-preview1`
+//! means that this crate's own personal version is 0.9.0 and it implements the
+//! `wasi-snapshot-preview1` snapshot. A major release of this crate (i.e.
+//! bumping the "0.9.0") is expected whenever the generated code changes
+//! or a new WASI snapshot is used.
+//!
+//! # Crate Features
+//!
+//! This crate supports one feature, `std`, which implements the standard
+//! `Error` trait for the exported [`Error`] type in this crate. This is
+//! enabled by default but can be disabled to make the library `no_std`
+//! compatible.
+
+#![no_std]
+
+mod lib_generated;
+pub use lib_generated::*;
+
+/// Special `Dircookie` value indicating the start of a directory.
+pub const DIRCOOKIE_START: Dircookie = 0;
+
+/// The "standard input" descriptor number.
+pub const FD_STDIN: Fd = 0;
+
+/// The "standard output" descriptor number.
+pub const FD_STDOUT: Fd = 1;
+
+/// The "standard error" descriptor number.
+pub const FD_STDERR: Fd = 2;
diff --git a/third_party/rust/wasi/src/lib_generated.rs b/third_party/rust/wasi/src/lib_generated.rs
new file mode 100644
index 0000000000..641528178f
--- /dev/null
+++ b/third_party/rust/wasi/src/lib_generated.rs
@@ -0,0 +1,2366 @@
+// This file is automatically generated, DO NOT EDIT
+//
+// To regenerate this file run the `crates/witx-bindgen` command
+
+use core::fmt;
+use core::mem::MaybeUninit;
+pub type Size = usize;
+pub type Filesize = u64;
+pub type Timestamp = u64;
+#[repr(transparent)]
+#[derive(Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub struct Clockid(u32);
+/// The clock measuring real time. Time value zero corresponds with
+/// 1970-01-01T00:00:00Z.
+pub const CLOCKID_REALTIME: Clockid = Clockid(0);
+/// The store-wide monotonic clock, which is defined as a clock measuring
+/// real time, whose value cannot be adjusted and which cannot have negative
+/// clock jumps. The epoch of this clock is undefined. The absolute time
+/// value of this clock therefore has no meaning.
+pub const CLOCKID_MONOTONIC: Clockid = Clockid(1);
+/// The CPU-time clock associated with the current process.
+pub const CLOCKID_PROCESS_CPUTIME_ID: Clockid = Clockid(2);
+/// The CPU-time clock associated with the current thread.
+pub const CLOCKID_THREAD_CPUTIME_ID: Clockid = Clockid(3);
+impl Clockid {
+    pub const fn raw(&self) -> u32 {
+        self.0
+    }
+
+    pub fn name(&self) -> &'static str {
+        match self.0 {
+            0 => "REALTIME",
+            1 => "MONOTONIC",
+            2 => "PROCESS_CPUTIME_ID",
+            3 => "THREAD_CPUTIME_ID",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+    pub fn message(&self) -> &'static str {
+        match self.0 {
+            0 => {
+                "The clock measuring real time. Time value zero corresponds with
+1970-01-01T00:00:00Z."
+            }
+            1 => {
+                "The store-wide monotonic clock, which is defined as a clock measuring
+real time, whose value cannot be adjusted and which cannot have negative
+clock jumps. The epoch of this clock is undefined. The absolute time
+value of this clock therefore has no meaning."
+            }
+            2 => "The CPU-time clock associated with the current process.",
+            3 => "The CPU-time clock associated with the current thread.",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+}
+impl fmt::Debug for Clockid {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Clockid")
+            .field("code", &self.0)
+            .field("name", &self.name())
+            .field("message", &self.message())
+            .finish()
+    }
+}
+
+#[repr(transparent)]
+#[derive(Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub struct Errno(u16);
+/// No error occurred. System call completed successfully.
+pub const ERRNO_SUCCESS: Errno = Errno(0);
+/// Argument list too long.
+pub const ERRNO_2BIG: Errno = Errno(1);
+/// Permission denied.
+pub const ERRNO_ACCES: Errno = Errno(2);
+/// Address in use.
+pub const ERRNO_ADDRINUSE: Errno = Errno(3);
+/// Address not available.
+pub const ERRNO_ADDRNOTAVAIL: Errno = Errno(4);
+/// Address family not supported.
+pub const ERRNO_AFNOSUPPORT: Errno = Errno(5);
+/// Resource unavailable, or operation would block.
+pub const ERRNO_AGAIN: Errno = Errno(6);
+/// Connection already in progress.
+pub const ERRNO_ALREADY: Errno = Errno(7);
+/// Bad file descriptor.
+pub const ERRNO_BADF: Errno = Errno(8);
+/// Bad message.
+pub const ERRNO_BADMSG: Errno = Errno(9);
+/// Device or resource busy.
+pub const ERRNO_BUSY: Errno = Errno(10);
+/// Operation canceled.
+pub const ERRNO_CANCELED: Errno = Errno(11);
+/// No child processes.
+pub const ERRNO_CHILD: Errno = Errno(12);
+/// Connection aborted.
+pub const ERRNO_CONNABORTED: Errno = Errno(13);
+/// Connection refused.
+pub const ERRNO_CONNREFUSED: Errno = Errno(14);
+/// Connection reset.
+pub const ERRNO_CONNRESET: Errno = Errno(15);
+/// Resource deadlock would occur.
+pub const ERRNO_DEADLK: Errno = Errno(16);
+/// Destination address required.
+pub const ERRNO_DESTADDRREQ: Errno = Errno(17);
+/// Mathematics argument out of domain of function.
+pub const ERRNO_DOM: Errno = Errno(18);
+/// Reserved.
+pub const ERRNO_DQUOT: Errno = Errno(19);
+/// File exists.
+pub const ERRNO_EXIST: Errno = Errno(20);
+/// Bad address.
+pub const ERRNO_FAULT: Errno = Errno(21);
+/// File too large.
+pub const ERRNO_FBIG: Errno = Errno(22);
+/// Host is unreachable.
+pub const ERRNO_HOSTUNREACH: Errno = Errno(23);
+/// Identifier removed.
+pub const ERRNO_IDRM: Errno = Errno(24);
+/// Illegal byte sequence.
+pub const ERRNO_ILSEQ: Errno = Errno(25);
+/// Operation in progress.
+pub const ERRNO_INPROGRESS: Errno = Errno(26);
+/// Interrupted function.
+pub const ERRNO_INTR: Errno = Errno(27);
+/// Invalid argument.
+pub const ERRNO_INVAL: Errno = Errno(28);
+/// I/O error.
+pub const ERRNO_IO: Errno = Errno(29);
+/// Socket is connected.
+pub const ERRNO_ISCONN: Errno = Errno(30);
+/// Is a directory.
+pub const ERRNO_ISDIR: Errno = Errno(31);
+/// Too many levels of symbolic links.
+pub const ERRNO_LOOP: Errno = Errno(32);
+/// File descriptor value too large.
+pub const ERRNO_MFILE: Errno = Errno(33);
+/// Too many links.
+pub const ERRNO_MLINK: Errno = Errno(34);
+/// Message too large.
+pub const ERRNO_MSGSIZE: Errno = Errno(35);
+/// Reserved.
+pub const ERRNO_MULTIHOP: Errno = Errno(36);
+/// Filename too long.
+pub const ERRNO_NAMETOOLONG: Errno = Errno(37);
+/// Network is down.
+pub const ERRNO_NETDOWN: Errno = Errno(38);
+/// Connection aborted by network.
+pub const ERRNO_NETRESET: Errno = Errno(39);
+/// Network unreachable.
+pub const ERRNO_NETUNREACH: Errno = Errno(40);
+/// Too many files open in system.
+pub const ERRNO_NFILE: Errno = Errno(41);
+/// No buffer space available.
+pub const ERRNO_NOBUFS: Errno = Errno(42);
+/// No such device.
+pub const ERRNO_NODEV: Errno = Errno(43);
+/// No such file or directory.
+pub const ERRNO_NOENT: Errno = Errno(44);
+/// Executable file format error.
+pub const ERRNO_NOEXEC: Errno = Errno(45);
+/// No locks available.
+pub const ERRNO_NOLCK: Errno = Errno(46);
+/// Reserved.
+pub const ERRNO_NOLINK: Errno = Errno(47);
+/// Not enough space.
+pub const ERRNO_NOMEM: Errno = Errno(48);
+/// No message of the desired type.
+pub const ERRNO_NOMSG: Errno = Errno(49);
+/// Protocol not available.
+pub const ERRNO_NOPROTOOPT: Errno = Errno(50);
+/// No space left on device.
+pub const ERRNO_NOSPC: Errno = Errno(51);
+/// Function not supported.
+pub const ERRNO_NOSYS: Errno = Errno(52);
+/// The socket is not connected.
+pub const ERRNO_NOTCONN: Errno = Errno(53);
+/// Not a directory or a symbolic link to a directory.
+pub const ERRNO_NOTDIR: Errno = Errno(54);
+/// Directory not empty.
+pub const ERRNO_NOTEMPTY: Errno = Errno(55);
+/// State not recoverable.
+pub const ERRNO_NOTRECOVERABLE: Errno = Errno(56);
+/// Not a socket.
+pub const ERRNO_NOTSOCK: Errno = Errno(57);
+/// Not supported, or operation not supported on socket.
+pub const ERRNO_NOTSUP: Errno = Errno(58);
+/// Inappropriate I/O control operation.
+pub const ERRNO_NOTTY: Errno = Errno(59);
+/// No such device or address.
+pub const ERRNO_NXIO: Errno = Errno(60);
+/// Value too large to be stored in data type.
+pub const ERRNO_OVERFLOW: Errno = Errno(61);
+/// Previous owner died.
+pub const ERRNO_OWNERDEAD: Errno = Errno(62);
+/// Operation not permitted.
+pub const ERRNO_PERM: Errno = Errno(63);
+/// Broken pipe.
+pub const ERRNO_PIPE: Errno = Errno(64);
+/// Protocol error.
+pub const ERRNO_PROTO: Errno = Errno(65);
+/// Protocol not supported.
+pub const ERRNO_PROTONOSUPPORT: Errno = Errno(66);
+/// Protocol wrong type for socket.
+pub const ERRNO_PROTOTYPE: Errno = Errno(67);
+/// Result too large.
+pub const ERRNO_RANGE: Errno = Errno(68);
+/// Read-only file system.
+pub const ERRNO_ROFS: Errno = Errno(69);
+/// Invalid seek.
+pub const ERRNO_SPIPE: Errno = Errno(70);
+/// No such process.
+pub const ERRNO_SRCH: Errno = Errno(71);
+/// Reserved.
+pub const ERRNO_STALE: Errno = Errno(72);
+/// Connection timed out.
+pub const ERRNO_TIMEDOUT: Errno = Errno(73);
+/// Text file busy.
+pub const ERRNO_TXTBSY: Errno = Errno(74);
+/// Cross-device link.
+pub const ERRNO_XDEV: Errno = Errno(75);
+/// Extension: Capabilities insufficient.
+pub const ERRNO_NOTCAPABLE: Errno = Errno(76);
+impl Errno {
+    pub const fn raw(&self) -> u16 {
+        self.0
+    }
+
+    pub fn name(&self) -> &'static str {
+        match self.0 {
+            0 => "SUCCESS",
+            1 => "2BIG",
+            2 => "ACCES",
+            3 => "ADDRINUSE",
+            4 => "ADDRNOTAVAIL",
+            5 => "AFNOSUPPORT",
+            6 => "AGAIN",
+            7 => "ALREADY",
+            8 => "BADF",
+            9 => "BADMSG",
+            10 => "BUSY",
+            11 => "CANCELED",
+            12 => "CHILD",
+            13 => "CONNABORTED",
+            14 => "CONNREFUSED",
+            15 => "CONNRESET",
+            16 => "DEADLK",
+            17 => "DESTADDRREQ",
+            18 => "DOM",
+            19 => "DQUOT",
+            20 => "EXIST",
+            21 => "FAULT",
+            22 => "FBIG",
+            23 => "HOSTUNREACH",
+            24 => "IDRM",
+            25 => "ILSEQ",
+            26 => "INPROGRESS",
+            27 => "INTR",
+            28 => "INVAL",
+            29 => "IO",
+            30 => "ISCONN",
+            31 => "ISDIR",
+            32 => "LOOP",
+            33 => "MFILE",
+            34 => "MLINK",
+            35 => "MSGSIZE",
+            36 => "MULTIHOP",
+            37 => "NAMETOOLONG",
+            38 => "NETDOWN",
+            39 => "NETRESET",
+            40 => "NETUNREACH",
+            41 => "NFILE",
+            42 => "NOBUFS",
+            43 => "NODEV",
+            44 => "NOENT",
+            45 => "NOEXEC",
+            46 => "NOLCK",
+            47 => "NOLINK",
+            48 => "NOMEM",
+            49 => "NOMSG",
+            50 => "NOPROTOOPT",
+            51 => "NOSPC",
+            52 => "NOSYS",
+            53 => "NOTCONN",
+            54 => "NOTDIR",
+            55 => "NOTEMPTY",
+            56 => "NOTRECOVERABLE",
+            57 => "NOTSOCK",
+            58 => "NOTSUP",
+            59 => "NOTTY",
+            60 => "NXIO",
+            61 => "OVERFLOW",
+            62 => "OWNERDEAD",
+            63 => "PERM",
+            64 => "PIPE",
+            65 => "PROTO",
+            66 => "PROTONOSUPPORT",
+            67 => "PROTOTYPE",
+            68 => "RANGE",
+            69 => "ROFS",
+            70 => "SPIPE",
+            71 => "SRCH",
+            72 => "STALE",
+            73 => "TIMEDOUT",
+            74 => "TXTBSY",
+            75 => "XDEV",
+            76 => "NOTCAPABLE",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+    pub fn message(&self) -> &'static str {
+        match self.0 {
+            0 => "No error occurred. System call completed successfully.",
+            1 => "Argument list too long.",
+            2 => "Permission denied.",
+            3 => "Address in use.",
+            4 => "Address not available.",
+            5 => "Address family not supported.",
+            6 => "Resource unavailable, or operation would block.",
+            7 => "Connection already in progress.",
+            8 => "Bad file descriptor.",
+            9 => "Bad message.",
+            10 => "Device or resource busy.",
+            11 => "Operation canceled.",
+            12 => "No child processes.",
+            13 => "Connection aborted.",
+            14 => "Connection refused.",
+            15 => "Connection reset.",
+            16 => "Resource deadlock would occur.",
+            17 => "Destination address required.",
+            18 => "Mathematics argument out of domain of function.",
+            19 => "Reserved.",
+            20 => "File exists.",
+            21 => "Bad address.",
+            22 => "File too large.",
+            23 => "Host is unreachable.",
+            24 => "Identifier removed.",
+            25 => "Illegal byte sequence.",
+            26 => "Operation in progress.",
+            27 => "Interrupted function.",
+            28 => "Invalid argument.",
+            29 => "I/O error.",
+            30 => "Socket is connected.",
+            31 => "Is a directory.",
+            32 => "Too many levels of symbolic links.",
+            33 => "File descriptor value too large.",
+            34 => "Too many links.",
+            35 => "Message too large.",
+            36 => "Reserved.",
+            37 => "Filename too long.",
+            38 => "Network is down.",
+            39 => "Connection aborted by network.",
+            40 => "Network unreachable.",
+            41 => "Too many files open in system.",
+            42 => "No buffer space available.",
+            43 => "No such device.",
+            44 => "No such file or directory.",
+            45 => "Executable file format error.",
+            46 => "No locks available.",
+            47 => "Reserved.",
+            48 => "Not enough space.",
+            49 => "No message of the desired type.",
+            50 => "Protocol not available.",
+            51 => "No space left on device.",
+            52 => "Function not supported.",
+            53 => "The socket is not connected.",
+            54 => "Not a directory or a symbolic link to a directory.",
+            55 => "Directory not empty.",
+            56 => "State not recoverable.",
+            57 => "Not a socket.",
+            58 => "Not supported, or operation not supported on socket.",
+            59 => "Inappropriate I/O control operation.",
+            60 => "No such device or address.",
+            61 => "Value too large to be stored in data type.",
+            62 => "Previous owner died.",
+            63 => "Operation not permitted.",
+            64 => "Broken pipe.",
+            65 => "Protocol error.",
+            66 => "Protocol not supported.",
+            67 => "Protocol wrong type for socket.",
+            68 => "Result too large.",
+            69 => "Read-only file system.",
+            70 => "Invalid seek.",
+            71 => "No such process.",
+            72 => "Reserved.",
+            73 => "Connection timed out.",
+            74 => "Text file busy.",
+            75 => "Cross-device link.",
+            76 => "Extension: Capabilities insufficient.",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+}
+impl fmt::Debug for Errno {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Errno")
+            .field("code", &self.0)
+            .field("name", &self.name())
+            .field("message", &self.message())
+            .finish()
+    }
+}
+impl fmt::Display for Errno {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{} (error {})", self.name(), self.0)
+    }
+}
+
+#[cfg(feature = "std")]
+extern crate std;
+#[cfg(feature = "std")]
+impl std::error::Error for Errno {}
+
+pub type Rights = u64;
+/// The right to invoke `fd_datasync`.
+/// If `path_open` is set, includes the right to invoke
+/// `path_open` with `fdflags::dsync`.
+pub const RIGHTS_FD_DATASYNC: Rights = 1 << 0;
+/// The right to invoke `fd_read` and `sock_recv`.
+/// If `rights::fd_seek` is set, includes the right to invoke `fd_pread`.
+pub const RIGHTS_FD_READ: Rights = 1 << 1;
+/// The right to invoke `fd_seek`. This flag implies `rights::fd_tell`.
+pub const RIGHTS_FD_SEEK: Rights = 1 << 2;
+/// The right to invoke `fd_fdstat_set_flags`.
+pub const RIGHTS_FD_FDSTAT_SET_FLAGS: Rights = 1 << 3;
+/// The right to invoke `fd_sync`.
+/// If `path_open` is set, includes the right to invoke
+/// `path_open` with `fdflags::rsync` and `fdflags::dsync`.
+pub const RIGHTS_FD_SYNC: Rights = 1 << 4;
+/// The right to invoke `fd_seek` in such a way that the file offset
+/// remains unaltered (i.e., `whence::cur` with offset zero), or to
+/// invoke `fd_tell`.
+pub const RIGHTS_FD_TELL: Rights = 1 << 5;
+/// The right to invoke `fd_write` and `sock_send`.
+/// If `rights::fd_seek` is set, includes the right to invoke `fd_pwrite`.
+pub const RIGHTS_FD_WRITE: Rights = 1 << 6;
+/// The right to invoke `fd_advise`.
+pub const RIGHTS_FD_ADVISE: Rights = 1 << 7;
+/// The right to invoke `fd_allocate`.
+pub const RIGHTS_FD_ALLOCATE: Rights = 1 << 8;
+/// The right to invoke `path_create_directory`.
+pub const RIGHTS_PATH_CREATE_DIRECTORY: Rights = 1 << 9;
+/// If `path_open` is set, the right to invoke `path_open` with `oflags::creat`.
+pub const RIGHTS_PATH_CREATE_FILE: Rights = 1 << 10;
+/// The right to invoke `path_link` with the file descriptor as the
+/// source directory.
+pub const RIGHTS_PATH_LINK_SOURCE: Rights = 1 << 11;
+/// The right to invoke `path_link` with the file descriptor as the
+/// target directory.
+pub const RIGHTS_PATH_LINK_TARGET: Rights = 1 << 12;
+/// The right to invoke `path_open`.
+pub const RIGHTS_PATH_OPEN: Rights = 1 << 13;
+/// The right to invoke `fd_readdir`.
+pub const RIGHTS_FD_READDIR: Rights = 1 << 14;
+/// The right to invoke `path_readlink`.
+pub const RIGHTS_PATH_READLINK: Rights = 1 << 15;
+/// The right to invoke `path_rename` with the file descriptor as the source directory.
+pub const RIGHTS_PATH_RENAME_SOURCE: Rights = 1 << 16;
+/// The right to invoke `path_rename` with the file descriptor as the target directory.
+pub const RIGHTS_PATH_RENAME_TARGET: Rights = 1 << 17;
+/// The right to invoke `path_filestat_get`.
+pub const RIGHTS_PATH_FILESTAT_GET: Rights = 1 << 18;
+/// The right to change a file's size (there is no `path_filestat_set_size`).
+/// If `path_open` is set, includes the right to invoke `path_open` with `oflags::trunc`.
+pub const RIGHTS_PATH_FILESTAT_SET_SIZE: Rights = 1 << 19;
+/// The right to invoke `path_filestat_set_times`.
+pub const RIGHTS_PATH_FILESTAT_SET_TIMES: Rights = 1 << 20;
+/// The right to invoke `fd_filestat_get`.
+pub const RIGHTS_FD_FILESTAT_GET: Rights = 1 << 21;
+/// The right to invoke `fd_filestat_set_size`.
+pub const RIGHTS_FD_FILESTAT_SET_SIZE: Rights = 1 << 22;
+/// The right to invoke `fd_filestat_set_times`.
+pub const RIGHTS_FD_FILESTAT_SET_TIMES: Rights = 1 << 23;
+/// The right to invoke `path_symlink`.
+pub const RIGHTS_PATH_SYMLINK: Rights = 1 << 24;
+/// The right to invoke `path_remove_directory`.
+pub const RIGHTS_PATH_REMOVE_DIRECTORY: Rights = 1 << 25;
+/// The right to invoke `path_unlink_file`.
+pub const RIGHTS_PATH_UNLINK_FILE: Rights = 1 << 26;
+/// If `rights::fd_read` is set, includes the right to invoke `poll_oneoff` to subscribe to `eventtype::fd_read`.
+/// If `rights::fd_write` is set, includes the right to invoke `poll_oneoff` to subscribe to `eventtype::fd_write`.
+pub const RIGHTS_POLL_FD_READWRITE: Rights = 1 << 27;
+/// The right to invoke `sock_shutdown`.
+pub const RIGHTS_SOCK_SHUTDOWN: Rights = 1 << 28;
+/// The right to invoke `sock_accept`.
+pub const RIGHTS_SOCK_ACCEPT: Rights = 1 << 29;
+
+pub type Fd = u32;
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct Iovec {
+    /// The address of the buffer to be filled.
+    pub buf: *mut u8,
+    /// The length of the buffer to be filled.
+    pub buf_len: Size,
+}
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct Ciovec {
+    /// The address of the buffer to be written.
+    pub buf: *const u8,
+    /// The length of the buffer to be written.
+    pub buf_len: Size,
+}
+pub type IovecArray<'a> = &'a [Iovec];
+pub type CiovecArray<'a> = &'a [Ciovec];
+pub type Filedelta = i64;
+#[repr(transparent)]
+#[derive(Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub struct Whence(u8);
+/// Seek relative to start-of-file.
+pub const WHENCE_SET: Whence = Whence(0);
+/// Seek relative to current position.
+pub const WHENCE_CUR: Whence = Whence(1);
+/// Seek relative to end-of-file.
+pub const WHENCE_END: Whence = Whence(2);
+impl Whence {
+    pub const fn raw(&self) -> u8 {
+        self.0
+    }
+
+    pub fn name(&self) -> &'static str {
+        match self.0 {
+            0 => "SET",
+            1 => "CUR",
+            2 => "END",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+    pub fn message(&self) -> &'static str {
+        match self.0 {
+            0 => "Seek relative to start-of-file.",
+            1 => "Seek relative to current position.",
+            2 => "Seek relative to end-of-file.",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+}
+impl fmt::Debug for Whence {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Whence")
+            .field("code", &self.0)
+            .field("name", &self.name())
+            .field("message", &self.message())
+            .finish()
+    }
+}
+
+pub type Dircookie = u64;
+pub type Dirnamlen = u32;
+pub type Inode = u64;
+#[repr(transparent)]
+#[derive(Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub struct Filetype(u8);
+/// The type of the file descriptor or file is unknown or is different from any of the other types specified.
+pub const FILETYPE_UNKNOWN: Filetype = Filetype(0);
+/// The file descriptor or file refers to a block device inode.
+pub const FILETYPE_BLOCK_DEVICE: Filetype = Filetype(1);
+/// The file descriptor or file refers to a character device inode.
+pub const FILETYPE_CHARACTER_DEVICE: Filetype = Filetype(2);
+/// The file descriptor or file refers to a directory inode.
+pub const FILETYPE_DIRECTORY: Filetype = Filetype(3);
+/// The file descriptor or file refers to a regular file inode.
+pub const FILETYPE_REGULAR_FILE: Filetype = Filetype(4);
+/// The file descriptor or file refers to a datagram socket.
+pub const FILETYPE_SOCKET_DGRAM: Filetype = Filetype(5);
+/// The file descriptor or file refers to a byte-stream socket.
+pub const FILETYPE_SOCKET_STREAM: Filetype = Filetype(6);
+/// The file refers to a symbolic link inode.
+pub const FILETYPE_SYMBOLIC_LINK: Filetype = Filetype(7);
+impl Filetype {
+    pub const fn raw(&self) -> u8 {
+        self.0
+    }
+
+    pub fn name(&self) -> &'static str {
+        match self.0 {
+            0 => "UNKNOWN",
+            1 => "BLOCK_DEVICE",
+            2 => "CHARACTER_DEVICE",
+            3 => "DIRECTORY",
+            4 => "REGULAR_FILE",
+            5 => "SOCKET_DGRAM",
+            6 => "SOCKET_STREAM",
+            7 => "SYMBOLIC_LINK",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+    pub fn message(&self) -> &'static str {
+        match self.0 {0 => "The type of the file descriptor or file is unknown or is different from any of the other types specified.",1 => "The file descriptor or file refers to a block device inode.",2 => "The file descriptor or file refers to a character device inode.",3 => "The file descriptor or file refers to a directory inode.",4 => "The file descriptor or file refers to a regular file inode.",5 => "The file descriptor or file refers to a datagram socket.",6 => "The file descriptor or file refers to a byte-stream socket.",7 => "The file refers to a symbolic link inode.",_ => unsafe { core::hint::unreachable_unchecked() },}
+    }
+}
+impl fmt::Debug for Filetype {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Filetype")
+            .field("code", &self.0)
+            .field("name", &self.name())
+            .field("message", &self.message())
+            .finish()
+    }
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct Dirent {
+    /// The offset of the next directory entry stored in this directory.
+    pub d_next: Dircookie,
+    /// The serial number of the file referred to by this directory entry.
+    pub d_ino: Inode,
+    /// The length of the name of the directory entry.
+    pub d_namlen: Dirnamlen,
+    /// The type of the file referred to by this directory entry.
+    pub d_type: Filetype,
+}
+#[repr(transparent)]
+#[derive(Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub struct Advice(u8);
+/// The application has no advice to give on its behavior with respect to the specified data.
+pub const ADVICE_NORMAL: Advice = Advice(0);
+/// The application expects to access the specified data sequentially from lower offsets to higher offsets.
+pub const ADVICE_SEQUENTIAL: Advice = Advice(1);
+/// The application expects to access the specified data in a random order.
+pub const ADVICE_RANDOM: Advice = Advice(2);
+/// The application expects to access the specified data in the near future.
+pub const ADVICE_WILLNEED: Advice = Advice(3);
+/// The application expects that it will not access the specified data in the near future.
+pub const ADVICE_DONTNEED: Advice = Advice(4);
+/// The application expects to access the specified data once and then not reuse it thereafter.
+pub const ADVICE_NOREUSE: Advice = Advice(5);
+impl Advice {
+    pub const fn raw(&self) -> u8 {
+        self.0
+    }
+
+    pub fn name(&self) -> &'static str {
+        match self.0 {
+            0 => "NORMAL",
+            1 => "SEQUENTIAL",
+            2 => "RANDOM",
+            3 => "WILLNEED",
+            4 => "DONTNEED",
+            5 => "NOREUSE",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+    pub fn message(&self) -> &'static str {
+        match self.0 {0 => "The application has no advice to give on its behavior with respect to the specified data.",1 => "The application expects to access the specified data sequentially from lower offsets to higher offsets.",2 => "The application expects to access the specified data in a random order.",3 => "The application expects to access the specified data in the near future.",4 => "The application expects that it will not access the specified data in the near future.",5 => "The application expects to access the specified data once and then not reuse it thereafter.",_ => unsafe { core::hint::unreachable_unchecked() },}
+    }
+}
+impl fmt::Debug for Advice {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Advice")
+            .field("code", &self.0)
+            .field("name", &self.name())
+            .field("message", &self.message())
+            .finish()
+    }
+}
+
+pub type Fdflags = u16;
+/// Append mode: Data written to the file is always appended to the file's end.
+pub const FDFLAGS_APPEND: Fdflags = 1 << 0;
+/// Write according to synchronized I/O data integrity completion. Only the data stored in the file is synchronized.
+pub const FDFLAGS_DSYNC: Fdflags = 1 << 1;
+/// Non-blocking mode.
+pub const FDFLAGS_NONBLOCK: Fdflags = 1 << 2;
+/// Synchronized read I/O operations.
+pub const FDFLAGS_RSYNC: Fdflags = 1 << 3;
+/// Write according to synchronized I/O file integrity completion. In
+/// addition to synchronizing the data stored in the file, the implementation
+/// may also synchronously update the file's metadata.
+pub const FDFLAGS_SYNC: Fdflags = 1 << 4;
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct Fdstat {
+    /// File type.
+    pub fs_filetype: Filetype,
+    /// File descriptor flags.
+    pub fs_flags: Fdflags,
+    /// Rights that apply to this file descriptor.
+    pub fs_rights_base: Rights,
+    /// Maximum set of rights that may be installed on new file descriptors that
+    /// are created through this file descriptor, e.g., through `path_open`.
+    pub fs_rights_inheriting: Rights,
+}
+pub type Device = u64;
+pub type Fstflags = u16;
+/// Adjust the last data access timestamp to the value stored in `filestat::atim`.
+pub const FSTFLAGS_ATIM: Fstflags = 1 << 0;
+/// Adjust the last data access timestamp to the time of clock `clockid::realtime`.
+pub const FSTFLAGS_ATIM_NOW: Fstflags = 1 << 1;
+/// Adjust the last data modification timestamp to the value stored in `filestat::mtim`.
+pub const FSTFLAGS_MTIM: Fstflags = 1 << 2;
+/// Adjust the last data modification timestamp to the time of clock `clockid::realtime`.
+pub const FSTFLAGS_MTIM_NOW: Fstflags = 1 << 3;
+
+pub type Lookupflags = u32;
+/// As long as the resolved path corresponds to a symbolic link, it is expanded.
+pub const LOOKUPFLAGS_SYMLINK_FOLLOW: Lookupflags = 1 << 0;
+
+pub type Oflags = u16;
+/// Create file if it does not exist.
+pub const OFLAGS_CREAT: Oflags = 1 << 0;
+/// Fail if not a directory.
+pub const OFLAGS_DIRECTORY: Oflags = 1 << 1;
+/// Fail if file already exists.
+pub const OFLAGS_EXCL: Oflags = 1 << 2;
+/// Truncate file to size 0.
+pub const OFLAGS_TRUNC: Oflags = 1 << 3;
+
+pub type Linkcount = u64;
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct Filestat {
+    /// Device ID of device containing the file.
+    pub dev: Device,
+    /// File serial number.
+    pub ino: Inode,
+    /// File type.
+    pub filetype: Filetype,
+    /// Number of hard links to the file.
+    pub nlink: Linkcount,
+    /// For regular files, the file size in bytes. For symbolic links, the length in bytes of the pathname contained in the symbolic link.
+    pub size: Filesize,
+    /// Last data access timestamp.
+    pub atim: Timestamp,
+    /// Last data modification timestamp.
+    pub mtim: Timestamp,
+    /// Last file status change timestamp.
+    pub ctim: Timestamp,
+}
+pub type Userdata = u64;
+#[repr(transparent)]
+#[derive(Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub struct Eventtype(u8);
+/// The time value of clock `subscription_clock::id` has
+/// reached timestamp `subscription_clock::timeout`.
+pub const EVENTTYPE_CLOCK: Eventtype = Eventtype(0);
+/// File descriptor `subscription_fd_readwrite::file_descriptor` has data
+/// available for reading. This event always triggers for regular files.
+pub const EVENTTYPE_FD_READ: Eventtype = Eventtype(1);
+/// File descriptor `subscription_fd_readwrite::file_descriptor` has capacity
+/// available for writing. This event always triggers for regular files.
+pub const EVENTTYPE_FD_WRITE: Eventtype = Eventtype(2);
+impl Eventtype {
+    pub const fn raw(&self) -> u8 {
+        self.0
+    }
+
+    pub fn name(&self) -> &'static str {
+        match self.0 {
+            0 => "CLOCK",
+            1 => "FD_READ",
+            2 => "FD_WRITE",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+    pub fn message(&self) -> &'static str {
+        match self.0 {
+            0 => {
+                "The time value of clock `subscription_clock::id` has
+reached timestamp `subscription_clock::timeout`."
+            }
+            1 => {
+                "File descriptor `subscription_fd_readwrite::file_descriptor` has data
+available for reading. This event always triggers for regular files."
+            }
+            2 => {
+                "File descriptor `subscription_fd_readwrite::file_descriptor` has capacity
+available for writing. This event always triggers for regular files."
+            }
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+}
+impl fmt::Debug for Eventtype {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Eventtype")
+            .field("code", &self.0)
+            .field("name", &self.name())
+            .field("message", &self.message())
+            .finish()
+    }
+}
+
+pub type Eventrwflags = u16;
+/// The peer of this socket has closed or disconnected.
+pub const EVENTRWFLAGS_FD_READWRITE_HANGUP: Eventrwflags = 1 << 0;
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct EventFdReadwrite {
+    /// The number of bytes available for reading or writing.
+    pub nbytes: Filesize,
+    /// The state of the file descriptor.
+    pub flags: Eventrwflags,
+}
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct Event {
+    /// User-provided value that got attached to `subscription::userdata`.
+    pub userdata: Userdata,
+    /// If non-zero, an error that occurred while processing the subscription request.
+    pub error: Errno,
+    /// The type of event that occured
+    pub type_: Eventtype,
+    /// The contents of the event, if it is an `eventtype::fd_read` or
+    /// `eventtype::fd_write`. `eventtype::clock` events ignore this field.
+    pub fd_readwrite: EventFdReadwrite,
+}
+pub type Subclockflags = u16;
+/// If set, treat the timestamp provided in
+/// `subscription_clock::timeout` as an absolute timestamp of clock
+/// `subscription_clock::id`. If clear, treat the timestamp
+/// provided in `subscription_clock::timeout` relative to the
+/// current time value of clock `subscription_clock::id`.
+pub const SUBCLOCKFLAGS_SUBSCRIPTION_CLOCK_ABSTIME: Subclockflags = 1 << 0;
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct SubscriptionClock {
+    /// The clock against which to compare the timestamp.
+    pub id: Clockid,
+    /// The absolute or relative timestamp.
+    pub timeout: Timestamp,
+    /// The amount of time that the implementation may wait additionally
+    /// to coalesce with other events.
+    pub precision: Timestamp,
+    /// Flags specifying whether the timeout is absolute or relative
+    pub flags: Subclockflags,
+}
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct SubscriptionFdReadwrite {
+    /// The file descriptor on which to wait for it to become ready for reading or writing.
+    pub file_descriptor: Fd,
+}
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub union SubscriptionUU {
+    pub clock: SubscriptionClock,
+    pub fd_read: SubscriptionFdReadwrite,
+    pub fd_write: SubscriptionFdReadwrite,
+}
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct SubscriptionU {
+    pub tag: u8,
+    pub u: SubscriptionUU,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct Subscription {
+    /// User-provided value that is attached to the subscription in the
+    /// implementation and returned through `event::userdata`.
+    pub userdata: Userdata,
+    /// The type of the event to which to subscribe, and its contents
+    pub u: SubscriptionU,
+}
+pub type Exitcode = u32;
+#[repr(transparent)]
+#[derive(Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub struct Signal(u8);
+/// No signal. Note that POSIX has special semantics for `kill(pid, 0)`,
+/// so this value is reserved.
+pub const SIGNAL_NONE: Signal = Signal(0);
+/// Hangup.
+/// Action: Terminates the process.
+pub const SIGNAL_HUP: Signal = Signal(1);
+/// Terminate interrupt signal.
+/// Action: Terminates the process.
+pub const SIGNAL_INT: Signal = Signal(2);
+/// Terminal quit signal.
+/// Action: Terminates the process.
+pub const SIGNAL_QUIT: Signal = Signal(3);
+/// Illegal instruction.
+/// Action: Terminates the process.
+pub const SIGNAL_ILL: Signal = Signal(4);
+/// Trace/breakpoint trap.
+/// Action: Terminates the process.
+pub const SIGNAL_TRAP: Signal = Signal(5);
+/// Process abort signal.
+/// Action: Terminates the process.
+pub const SIGNAL_ABRT: Signal = Signal(6);
+/// Access to an undefined portion of a memory object.
+/// Action: Terminates the process.
+pub const SIGNAL_BUS: Signal = Signal(7);
+/// Erroneous arithmetic operation.
+/// Action: Terminates the process.
+pub const SIGNAL_FPE: Signal = Signal(8);
+/// Kill.
+/// Action: Terminates the process.
+pub const SIGNAL_KILL: Signal = Signal(9);
+/// User-defined signal 1.
+/// Action: Terminates the process.
+pub const SIGNAL_USR1: Signal = Signal(10);
+/// Invalid memory reference.
+/// Action: Terminates the process.
+pub const SIGNAL_SEGV: Signal = Signal(11);
+/// User-defined signal 2.
+/// Action: Terminates the process.
+pub const SIGNAL_USR2: Signal = Signal(12);
+/// Write on a pipe with no one to read it.
+/// Action: Ignored.
+pub const SIGNAL_PIPE: Signal = Signal(13);
+/// Alarm clock.
+/// Action: Terminates the process.
+pub const SIGNAL_ALRM: Signal = Signal(14);
+/// Termination signal.
+/// Action: Terminates the process.
+pub const SIGNAL_TERM: Signal = Signal(15);
+/// Child process terminated, stopped, or continued.
+/// Action: Ignored.
+pub const SIGNAL_CHLD: Signal = Signal(16);
+/// Continue executing, if stopped.
+/// Action: Continues executing, if stopped.
+pub const SIGNAL_CONT: Signal = Signal(17);
+/// Stop executing.
+/// Action: Stops executing.
+pub const SIGNAL_STOP: Signal = Signal(18);
+/// Terminal stop signal.
+/// Action: Stops executing.
+pub const SIGNAL_TSTP: Signal = Signal(19);
+/// Background process attempting read.
+/// Action: Stops executing.
+pub const SIGNAL_TTIN: Signal = Signal(20);
+/// Background process attempting write.
+/// Action: Stops executing.
+pub const SIGNAL_TTOU: Signal = Signal(21);
+/// High bandwidth data is available at a socket.
+/// Action: Ignored.
+pub const SIGNAL_URG: Signal = Signal(22);
+/// CPU time limit exceeded.
+/// Action: Terminates the process.
+pub const SIGNAL_XCPU: Signal = Signal(23);
+/// File size limit exceeded.
+/// Action: Terminates the process.
+pub const SIGNAL_XFSZ: Signal = Signal(24);
+/// Virtual timer expired.
+/// Action: Terminates the process.
+pub const SIGNAL_VTALRM: Signal = Signal(25);
+/// Profiling timer expired.
+/// Action: Terminates the process.
+pub const SIGNAL_PROF: Signal = Signal(26);
+/// Window changed.
+/// Action: Ignored.
+pub const SIGNAL_WINCH: Signal = Signal(27);
+/// I/O possible.
+/// Action: Terminates the process.
+pub const SIGNAL_POLL: Signal = Signal(28);
+/// Power failure.
+/// Action: Terminates the process.
+pub const SIGNAL_PWR: Signal = Signal(29);
+/// Bad system call.
+/// Action: Terminates the process.
+pub const SIGNAL_SYS: Signal = Signal(30);
+impl Signal {
+    pub const fn raw(&self) -> u8 {
+        self.0
+    }
+
+    pub fn name(&self) -> &'static str {
+        match self.0 {
+            0 => "NONE",
+            1 => "HUP",
+            2 => "INT",
+            3 => "QUIT",
+            4 => "ILL",
+            5 => "TRAP",
+            6 => "ABRT",
+            7 => "BUS",
+            8 => "FPE",
+            9 => "KILL",
+            10 => "USR1",
+            11 => "SEGV",
+            12 => "USR2",
+            13 => "PIPE",
+            14 => "ALRM",
+            15 => "TERM",
+            16 => "CHLD",
+            17 => "CONT",
+            18 => "STOP",
+            19 => "TSTP",
+            20 => "TTIN",
+            21 => "TTOU",
+            22 => "URG",
+            23 => "XCPU",
+            24 => "XFSZ",
+            25 => "VTALRM",
+            26 => "PROF",
+            27 => "WINCH",
+            28 => "POLL",
+            29 => "PWR",
+            30 => "SYS",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+    pub fn message(&self) -> &'static str {
+        match self.0 {
+            0 => {
+                "No signal. Note that POSIX has special semantics for `kill(pid, 0)`,
+so this value is reserved."
+            }
+            1 => {
+                "Hangup.
+Action: Terminates the process."
+            }
+            2 => {
+                "Terminate interrupt signal.
+Action: Terminates the process."
+            }
+            3 => {
+                "Terminal quit signal.
+Action: Terminates the process."
+            }
+            4 => {
+                "Illegal instruction.
+Action: Terminates the process."
+            }
+            5 => {
+                "Trace/breakpoint trap.
+Action: Terminates the process."
+            }
+            6 => {
+                "Process abort signal.
+Action: Terminates the process."
+            }
+            7 => {
+                "Access to an undefined portion of a memory object.
+Action: Terminates the process."
+            }
+            8 => {
+                "Erroneous arithmetic operation.
+Action: Terminates the process."
+            }
+            9 => {
+                "Kill.
+Action: Terminates the process."
+            }
+            10 => {
+                "User-defined signal 1.
+Action: Terminates the process."
+            }
+            11 => {
+                "Invalid memory reference.
+Action: Terminates the process."
+            }
+            12 => {
+                "User-defined signal 2.
+Action: Terminates the process."
+            }
+            13 => {
+                "Write on a pipe with no one to read it.
+Action: Ignored."
+            }
+            14 => {
+                "Alarm clock.
+Action: Terminates the process."
+            }
+            15 => {
+                "Termination signal.
+Action: Terminates the process."
+            }
+            16 => {
+                "Child process terminated, stopped, or continued.
+Action: Ignored."
+            }
+            17 => {
+                "Continue executing, if stopped.
+Action: Continues executing, if stopped."
+            }
+            18 => {
+                "Stop executing.
+Action: Stops executing."
+            }
+            19 => {
+                "Terminal stop signal.
+Action: Stops executing."
+            }
+            20 => {
+                "Background process attempting read.
+Action: Stops executing."
+            }
+            21 => {
+                "Background process attempting write.
+Action: Stops executing."
+            }
+            22 => {
+                "High bandwidth data is available at a socket.
+Action: Ignored."
+            }
+            23 => {
+                "CPU time limit exceeded.
+Action: Terminates the process."
+            }
+            24 => {
+                "File size limit exceeded.
+Action: Terminates the process."
+            }
+            25 => {
+                "Virtual timer expired.
+Action: Terminates the process."
+            }
+            26 => {
+                "Profiling timer expired.
+Action: Terminates the process."
+            }
+            27 => {
+                "Window changed.
+Action: Ignored."
+            }
+            28 => {
+                "I/O possible.
+Action: Terminates the process."
+            }
+            29 => {
+                "Power failure.
+Action: Terminates the process."
+            }
+            30 => {
+                "Bad system call.
+Action: Terminates the process."
+            }
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+}
+impl fmt::Debug for Signal {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Signal")
+            .field("code", &self.0)
+            .field("name", &self.name())
+            .field("message", &self.message())
+            .finish()
+    }
+}
+
+pub type Riflags = u16;
+/// Returns the message without removing it from the socket's receive queue.
+pub const RIFLAGS_RECV_PEEK: Riflags = 1 << 0;
+/// On byte-stream sockets, block until the full amount of data can be returned.
+pub const RIFLAGS_RECV_WAITALL: Riflags = 1 << 1;
+
+pub type Roflags = u16;
+/// Returned by `sock_recv`: Message data has been truncated.
+pub const ROFLAGS_RECV_DATA_TRUNCATED: Roflags = 1 << 0;
+
+pub type Siflags = u16;
+pub type Sdflags = u8;
+/// Disables further receive operations.
+pub const SDFLAGS_RD: Sdflags = 1 << 0;
+/// Disables further send operations.
+pub const SDFLAGS_WR: Sdflags = 1 << 1;
+
+#[repr(transparent)]
+#[derive(Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
+pub struct Preopentype(u8);
+/// A pre-opened directory.
+pub const PREOPENTYPE_DIR: Preopentype = Preopentype(0);
+impl Preopentype {
+    pub const fn raw(&self) -> u8 {
+        self.0
+    }
+
+    pub fn name(&self) -> &'static str {
+        match self.0 {
+            0 => "DIR",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+    pub fn message(&self) -> &'static str {
+        match self.0 {
+            0 => "A pre-opened directory.",
+            _ => unsafe { core::hint::unreachable_unchecked() },
+        }
+    }
+}
+impl fmt::Debug for Preopentype {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Preopentype")
+            .field("code", &self.0)
+            .field("name", &self.name())
+            .field("message", &self.message())
+            .finish()
+    }
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub struct PrestatDir {
+    /// The length of the directory name for use with `fd_prestat_dir_name`.
+    pub pr_name_len: Size,
+}
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub union PrestatU {
+    pub dir: PrestatDir,
+}
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct Prestat {
+    pub tag: u8,
+    pub u: PrestatU,
+}
+
+/// Read command-line argument data.
+/// The size of the array should match that returned by `args_sizes_get`.
+/// Each argument is expected to be `\0` terminated.
+pub unsafe fn args_get(argv: *mut *mut u8, argv_buf: *mut u8) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::args_get(argv as i32, argv_buf as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Return command-line argument data sizes.
+///
+/// ## Return
+///
+/// Returns the number of arguments and the size of the argument string
+/// data, or an error.
+pub unsafe fn args_sizes_get() -> Result<(Size, Size), Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let mut rp1 = MaybeUninit::<Size>::uninit();
+    let ret =
+        wasi_snapshot_preview1::args_sizes_get(rp0.as_mut_ptr() as i32, rp1.as_mut_ptr() as i32);
+    match ret {
+        0 => Ok((
+            core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size),
+            core::ptr::read(rp1.as_mut_ptr() as i32 as *const Size),
+        )),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Read environment variable data.
+/// The sizes of the buffers should match that returned by `environ_sizes_get`.
+/// Key/value pairs are expected to be joined with `=`s, and terminated with `\0`s.
+pub unsafe fn environ_get(environ: *mut *mut u8, environ_buf: *mut u8) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::environ_get(environ as i32, environ_buf as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Return environment variable data sizes.
+///
+/// ## Return
+///
+/// Returns the number of environment variable arguments and the size of the
+/// environment variable data.
+pub unsafe fn environ_sizes_get() -> Result<(Size, Size), Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let mut rp1 = MaybeUninit::<Size>::uninit();
+    let ret =
+        wasi_snapshot_preview1::environ_sizes_get(rp0.as_mut_ptr() as i32, rp1.as_mut_ptr() as i32);
+    match ret {
+        0 => Ok((
+            core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size),
+            core::ptr::read(rp1.as_mut_ptr() as i32 as *const Size),
+        )),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Return the resolution of a clock.
+/// Implementations are required to provide a non-zero value for supported clocks. For unsupported clocks,
+/// return `errno::inval`.
+/// Note: This is similar to `clock_getres` in POSIX.
+///
+/// ## Parameters
+///
+/// * `id` - The clock for which to return the resolution.
+///
+/// ## Return
+///
+/// The resolution of the clock, or an error if one happened.
+pub unsafe fn clock_res_get(id: Clockid) -> Result<Timestamp, Errno> {
+    let mut rp0 = MaybeUninit::<Timestamp>::uninit();
+    let ret = wasi_snapshot_preview1::clock_res_get(id.0 as i32, rp0.as_mut_ptr() as i32);
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Timestamp)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Return the time value of a clock.
+/// Note: This is similar to `clock_gettime` in POSIX.
+///
+/// ## Parameters
+///
+/// * `id` - The clock for which to return the time.
+/// * `precision` - The maximum lag (exclusive) that the returned time value may have, compared to its actual value.
+///
+/// ## Return
+///
+/// The time value of the clock.
+pub unsafe fn clock_time_get(id: Clockid, precision: Timestamp) -> Result<Timestamp, Errno> {
+    let mut rp0 = MaybeUninit::<Timestamp>::uninit();
+    let ret = wasi_snapshot_preview1::clock_time_get(
+        id.0 as i32,
+        precision as i64,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Timestamp)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Provide file advisory information on a file descriptor.
+/// Note: This is similar to `posix_fadvise` in POSIX.
+///
+/// ## Parameters
+///
+/// * `offset` - The offset within the file to which the advisory applies.
+/// * `len` - The length of the region to which the advisory applies.
+/// * `advice` - The advice.
+pub unsafe fn fd_advise(
+    fd: Fd,
+    offset: Filesize,
+    len: Filesize,
+    advice: Advice,
+) -> Result<(), Errno> {
+    let ret =
+        wasi_snapshot_preview1::fd_advise(fd as i32, offset as i64, len as i64, advice.0 as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Force the allocation of space in a file.
+/// Note: This is similar to `posix_fallocate` in POSIX.
+///
+/// ## Parameters
+///
+/// * `offset` - The offset at which to start the allocation.
+/// * `len` - The length of the area that is allocated.
+pub unsafe fn fd_allocate(fd: Fd, offset: Filesize, len: Filesize) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_allocate(fd as i32, offset as i64, len as i64);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Close a file descriptor.
+/// Note: This is similar to `close` in POSIX.
+pub unsafe fn fd_close(fd: Fd) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_close(fd as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Synchronize the data of a file to disk.
+/// Note: This is similar to `fdatasync` in POSIX.
+pub unsafe fn fd_datasync(fd: Fd) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_datasync(fd as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Get the attributes of a file descriptor.
+/// Note: This returns similar flags to `fsync(fd, F_GETFL)` in POSIX, as well as additional fields.
+///
+/// ## Return
+///
+/// The buffer where the file descriptor's attributes are stored.
+pub unsafe fn fd_fdstat_get(fd: Fd) -> Result<Fdstat, Errno> {
+    let mut rp0 = MaybeUninit::<Fdstat>::uninit();
+    let ret = wasi_snapshot_preview1::fd_fdstat_get(fd as i32, rp0.as_mut_ptr() as i32);
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Fdstat)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Adjust the flags associated with a file descriptor.
+/// Note: This is similar to `fcntl(fd, F_SETFL, flags)` in POSIX.
+///
+/// ## Parameters
+///
+/// * `flags` - The desired values of the file descriptor flags.
+pub unsafe fn fd_fdstat_set_flags(fd: Fd, flags: Fdflags) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_fdstat_set_flags(fd as i32, flags as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Adjust the rights associated with a file descriptor.
+/// This can only be used to remove rights, and returns `errno::notcapable` if called in a way that would attempt to add rights
+///
+/// ## Parameters
+///
+/// * `fs_rights_base` - The desired rights of the file descriptor.
+pub unsafe fn fd_fdstat_set_rights(
+    fd: Fd,
+    fs_rights_base: Rights,
+    fs_rights_inheriting: Rights,
+) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_fdstat_set_rights(
+        fd as i32,
+        fs_rights_base as i64,
+        fs_rights_inheriting as i64,
+    );
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Return the attributes of an open file.
+///
+/// ## Return
+///
+/// The buffer where the file's attributes are stored.
+pub unsafe fn fd_filestat_get(fd: Fd) -> Result<Filestat, Errno> {
+    let mut rp0 = MaybeUninit::<Filestat>::uninit();
+    let ret = wasi_snapshot_preview1::fd_filestat_get(fd as i32, rp0.as_mut_ptr() as i32);
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Filestat)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Adjust the size of an open file. If this increases the file's size, the extra bytes are filled with zeros.
+/// Note: This is similar to `ftruncate` in POSIX.
+///
+/// ## Parameters
+///
+/// * `size` - The desired file size.
+pub unsafe fn fd_filestat_set_size(fd: Fd, size: Filesize) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_filestat_set_size(fd as i32, size as i64);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Adjust the timestamps of an open file or directory.
+/// Note: This is similar to `futimens` in POSIX.
+///
+/// ## Parameters
+///
+/// * `atim` - The desired values of the data access timestamp.
+/// * `mtim` - The desired values of the data modification timestamp.
+/// * `fst_flags` - A bitmask indicating which timestamps to adjust.
+pub unsafe fn fd_filestat_set_times(
+    fd: Fd,
+    atim: Timestamp,
+    mtim: Timestamp,
+    fst_flags: Fstflags,
+) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_filestat_set_times(
+        fd as i32,
+        atim as i64,
+        mtim as i64,
+        fst_flags as i32,
+    );
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Read from a file descriptor, without using and updating the file descriptor's offset.
+/// Note: This is similar to `preadv` in POSIX.
+///
+/// ## Parameters
+///
+/// * `iovs` - List of scatter/gather vectors in which to store data.
+/// * `offset` - The offset within the file at which to read.
+///
+/// ## Return
+///
+/// The number of bytes read.
+pub unsafe fn fd_pread(fd: Fd, iovs: IovecArray<'_>, offset: Filesize) -> Result<Size, Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let ret = wasi_snapshot_preview1::fd_pread(
+        fd as i32,
+        iovs.as_ptr() as i32,
+        iovs.len() as i32,
+        offset as i64,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Return a description of the given preopened file descriptor.
+///
+/// ## Return
+///
+/// The buffer where the description is stored.
+pub unsafe fn fd_prestat_get(fd: Fd) -> Result<Prestat, Errno> {
+    let mut rp0 = MaybeUninit::<Prestat>::uninit();
+    let ret = wasi_snapshot_preview1::fd_prestat_get(fd as i32, rp0.as_mut_ptr() as i32);
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Prestat)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Return a description of the given preopened file descriptor.
+///
+/// ## Parameters
+///
+/// * `path` - A buffer into which to write the preopened directory name.
+pub unsafe fn fd_prestat_dir_name(fd: Fd, path: *mut u8, path_len: Size) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_prestat_dir_name(fd as i32, path as i32, path_len as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Write to a file descriptor, without using and updating the file descriptor's offset.
+/// Note: This is similar to `pwritev` in POSIX.
+///
+/// ## Parameters
+///
+/// * `iovs` - List of scatter/gather vectors from which to retrieve data.
+/// * `offset` - The offset within the file at which to write.
+///
+/// ## Return
+///
+/// The number of bytes written.
+pub unsafe fn fd_pwrite(fd: Fd, iovs: CiovecArray<'_>, offset: Filesize) -> Result<Size, Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let ret = wasi_snapshot_preview1::fd_pwrite(
+        fd as i32,
+        iovs.as_ptr() as i32,
+        iovs.len() as i32,
+        offset as i64,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Read from a file descriptor.
+/// Note: This is similar to `readv` in POSIX.
+///
+/// ## Parameters
+///
+/// * `iovs` - List of scatter/gather vectors to which to store data.
+///
+/// ## Return
+///
+/// The number of bytes read.
+pub unsafe fn fd_read(fd: Fd, iovs: IovecArray<'_>) -> Result<Size, Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let ret = wasi_snapshot_preview1::fd_read(
+        fd as i32,
+        iovs.as_ptr() as i32,
+        iovs.len() as i32,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Read directory entries from a directory.
+/// When successful, the contents of the output buffer consist of a sequence of
+/// directory entries. Each directory entry consists of a `dirent` object,
+/// followed by `dirent::d_namlen` bytes holding the name of the directory
+/// entry.
+/// This function fills the output buffer as much as possible, potentially
+/// truncating the last directory entry. This allows the caller to grow its
+/// read buffer size in case it's too small to fit a single large directory
+/// entry, or skip the oversized directory entry.
+///
+/// ## Parameters
+///
+/// * `buf` - The buffer where directory entries are stored
+/// * `cookie` - The location within the directory to start reading
+///
+/// ## Return
+///
+/// The number of bytes stored in the read buffer. If less than the size of the read buffer, the end of the directory has been reached.
+pub unsafe fn fd_readdir(
+    fd: Fd,
+    buf: *mut u8,
+    buf_len: Size,
+    cookie: Dircookie,
+) -> Result<Size, Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let ret = wasi_snapshot_preview1::fd_readdir(
+        fd as i32,
+        buf as i32,
+        buf_len as i32,
+        cookie as i64,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Atomically replace a file descriptor by renumbering another file descriptor.
+/// Due to the strong focus on thread safety, this environment does not provide
+/// a mechanism to duplicate or renumber a file descriptor to an arbitrary
+/// number, like `dup2()`. This would be prone to race conditions, as an actual
+/// file descriptor with the same number could be allocated by a different
+/// thread at the same time.
+/// This function provides a way to atomically renumber file descriptors, which
+/// would disappear if `dup2()` were to be removed entirely.
+///
+/// ## Parameters
+///
+/// * `to` - The file descriptor to overwrite.
+pub unsafe fn fd_renumber(fd: Fd, to: Fd) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_renumber(fd as i32, to as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Move the offset of a file descriptor.
+/// Note: This is similar to `lseek` in POSIX.
+///
+/// ## Parameters
+///
+/// * `offset` - The number of bytes to move.
+/// * `whence` - The base from which the offset is relative.
+///
+/// ## Return
+///
+/// The new offset of the file descriptor, relative to the start of the file.
+pub unsafe fn fd_seek(fd: Fd, offset: Filedelta, whence: Whence) -> Result<Filesize, Errno> {
+    let mut rp0 = MaybeUninit::<Filesize>::uninit();
+    let ret = wasi_snapshot_preview1::fd_seek(
+        fd as i32,
+        offset,
+        whence.0 as i32,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Filesize)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Synchronize the data and metadata of a file to disk.
+/// Note: This is similar to `fsync` in POSIX.
+pub unsafe fn fd_sync(fd: Fd) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::fd_sync(fd as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Return the current offset of a file descriptor.
+/// Note: This is similar to `lseek(fd, 0, SEEK_CUR)` in POSIX.
+///
+/// ## Return
+///
+/// The current offset of the file descriptor, relative to the start of the file.
+pub unsafe fn fd_tell(fd: Fd) -> Result<Filesize, Errno> {
+    let mut rp0 = MaybeUninit::<Filesize>::uninit();
+    let ret = wasi_snapshot_preview1::fd_tell(fd as i32, rp0.as_mut_ptr() as i32);
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Filesize)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Write to a file descriptor.
+/// Note: This is similar to `writev` in POSIX.
+///
+/// ## Parameters
+///
+/// * `iovs` - List of scatter/gather vectors from which to retrieve data.
+pub unsafe fn fd_write(fd: Fd, iovs: CiovecArray<'_>) -> Result<Size, Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let ret = wasi_snapshot_preview1::fd_write(
+        fd as i32,
+        iovs.as_ptr() as i32,
+        iovs.len() as i32,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Create a directory.
+/// Note: This is similar to `mkdirat` in POSIX.
+///
+/// ## Parameters
+///
+/// * `path` - The path at which to create the directory.
+pub unsafe fn path_create_directory(fd: Fd, path: &str) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::path_create_directory(
+        fd as i32,
+        path.as_ptr() as i32,
+        path.len() as i32,
+    );
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Return the attributes of a file or directory.
+/// Note: This is similar to `stat` in POSIX.
+///
+/// ## Parameters
+///
+/// * `flags` - Flags determining the method of how the path is resolved.
+/// * `path` - The path of the file or directory to inspect.
+///
+/// ## Return
+///
+/// The buffer where the file's attributes are stored.
+pub unsafe fn path_filestat_get(fd: Fd, flags: Lookupflags, path: &str) -> Result<Filestat, Errno> {
+    let mut rp0 = MaybeUninit::<Filestat>::uninit();
+    let ret = wasi_snapshot_preview1::path_filestat_get(
+        fd as i32,
+        flags as i32,
+        path.as_ptr() as i32,
+        path.len() as i32,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Filestat)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Adjust the timestamps of a file or directory.
+/// Note: This is similar to `utimensat` in POSIX.
+///
+/// ## Parameters
+///
+/// * `flags` - Flags determining the method of how the path is resolved.
+/// * `path` - The path of the file or directory to operate on.
+/// * `atim` - The desired values of the data access timestamp.
+/// * `mtim` - The desired values of the data modification timestamp.
+/// * `fst_flags` - A bitmask indicating which timestamps to adjust.
+pub unsafe fn path_filestat_set_times(
+    fd: Fd,
+    flags: Lookupflags,
+    path: &str,
+    atim: Timestamp,
+    mtim: Timestamp,
+    fst_flags: Fstflags,
+) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::path_filestat_set_times(
+        fd as i32,
+        flags as i32,
+        path.as_ptr() as i32,
+        path.len() as i32,
+        atim as i64,
+        mtim as i64,
+        fst_flags as i32,
+    );
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Create a hard link.
+/// Note: This is similar to `linkat` in POSIX.
+///
+/// ## Parameters
+///
+/// * `old_flags` - Flags determining the method of how the path is resolved.
+/// * `old_path` - The source path from which to link.
+/// * `new_fd` - The working directory at which the resolution of the new path starts.
+/// * `new_path` - The destination path at which to create the hard link.
+pub unsafe fn path_link(
+    old_fd: Fd,
+    old_flags: Lookupflags,
+    old_path: &str,
+    new_fd: Fd,
+    new_path: &str,
+) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::path_link(
+        old_fd as i32,
+        old_flags as i32,
+        old_path.as_ptr() as i32,
+        old_path.len() as i32,
+        new_fd as i32,
+        new_path.as_ptr() as i32,
+        new_path.len() as i32,
+    );
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Open a file or directory.
+/// The returned file descriptor is not guaranteed to be the lowest-numbered
+/// file descriptor not currently open; it is randomized to prevent
+/// applications from depending on making assumptions about indexes, since this
+/// is error-prone in multi-threaded contexts. The returned file descriptor is
+/// guaranteed to be less than 2**31.
+/// Note: This is similar to `openat` in POSIX.
+///
+/// ## Parameters
+///
+/// * `dirflags` - Flags determining the method of how the path is resolved.
+/// * `path` - The relative path of the file or directory to open, relative to the
+///   `path_open::fd` directory.
+/// * `oflags` - The method by which to open the file.
+/// * `fs_rights_base` - The initial rights of the newly created file descriptor. The
+///   implementation is allowed to return a file descriptor with fewer rights
+///   than specified, if and only if those rights do not apply to the type of
+///   file being opened.
+///   The *base* rights are rights that will apply to operations using the file
+///   descriptor itself, while the *inheriting* rights are rights that apply to
+///   file descriptors derived from it.
+///
+/// ## Return
+///
+/// The file descriptor of the file that has been opened.
+pub unsafe fn path_open(
+    fd: Fd,
+    dirflags: Lookupflags,
+    path: &str,
+    oflags: Oflags,
+    fs_rights_base: Rights,
+    fs_rights_inheriting: Rights,
+    fdflags: Fdflags,
+) -> Result<Fd, Errno> {
+    let mut rp0 = MaybeUninit::<Fd>::uninit();
+    let ret = wasi_snapshot_preview1::path_open(
+        fd as i32,
+        dirflags as i32,
+        path.as_ptr() as i32,
+        path.len() as i32,
+        oflags as i32,
+        fs_rights_base as i64,
+        fs_rights_inheriting as i64,
+        fdflags as i32,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Fd)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Read the contents of a symbolic link.
+/// Note: This is similar to `readlinkat` in POSIX.
+///
+/// ## Parameters
+///
+/// * `path` - The path of the symbolic link from which to read.
+/// * `buf` - The buffer to which to write the contents of the symbolic link.
+///
+/// ## Return
+///
+/// The number of bytes placed in the buffer.
+pub unsafe fn path_readlink(
+    fd: Fd,
+    path: &str,
+    buf: *mut u8,
+    buf_len: Size,
+) -> Result<Size, Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let ret = wasi_snapshot_preview1::path_readlink(
+        fd as i32,
+        path.as_ptr() as i32,
+        path.len() as i32,
+        buf as i32,
+        buf_len as i32,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Remove a directory.
+/// Return `errno::notempty` if the directory is not empty.
+/// Note: This is similar to `unlinkat(fd, path, AT_REMOVEDIR)` in POSIX.
+///
+/// ## Parameters
+///
+/// * `path` - The path to a directory to remove.
+pub unsafe fn path_remove_directory(fd: Fd, path: &str) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::path_remove_directory(
+        fd as i32,
+        path.as_ptr() as i32,
+        path.len() as i32,
+    );
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Rename a file or directory.
+/// Note: This is similar to `renameat` in POSIX.
+///
+/// ## Parameters
+///
+/// * `old_path` - The source path of the file or directory to rename.
+/// * `new_fd` - The working directory at which the resolution of the new path starts.
+/// * `new_path` - The destination path to which to rename the file or directory.
+pub unsafe fn path_rename(fd: Fd, old_path: &str, new_fd: Fd, new_path: &str) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::path_rename(
+        fd as i32,
+        old_path.as_ptr() as i32,
+        old_path.len() as i32,
+        new_fd as i32,
+        new_path.as_ptr() as i32,
+        new_path.len() as i32,
+    );
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Create a symbolic link.
+/// Note: This is similar to `symlinkat` in POSIX.
+///
+/// ## Parameters
+///
+/// * `old_path` - The contents of the symbolic link.
+/// * `new_path` - The destination path at which to create the symbolic link.
+pub unsafe fn path_symlink(old_path: &str, fd: Fd, new_path: &str) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::path_symlink(
+        old_path.as_ptr() as i32,
+        old_path.len() as i32,
+        fd as i32,
+        new_path.as_ptr() as i32,
+        new_path.len() as i32,
+    );
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Unlink a file.
+/// Return `errno::isdir` if the path refers to a directory.
+/// Note: This is similar to `unlinkat(fd, path, 0)` in POSIX.
+///
+/// ## Parameters
+///
+/// * `path` - The path to a file to unlink.
+pub unsafe fn path_unlink_file(fd: Fd, path: &str) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::path_unlink_file(
+        fd as i32,
+        path.as_ptr() as i32,
+        path.len() as i32,
+    );
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Concurrently poll for the occurrence of a set of events.
+///
+/// ## Parameters
+///
+/// * `in_` - The events to which to subscribe.
+/// * `out` - The events that have occurred.
+/// * `nsubscriptions` - Both the number of subscriptions and events.
+///
+/// ## Return
+///
+/// The number of events stored.
+pub unsafe fn poll_oneoff(
+    in_: *const Subscription,
+    out: *mut Event,
+    nsubscriptions: Size,
+) -> Result<Size, Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let ret = wasi_snapshot_preview1::poll_oneoff(
+        in_ as i32,
+        out as i32,
+        nsubscriptions as i32,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Terminate the process normally. An exit code of 0 indicates successful
+/// termination of the program. The meanings of other values is dependent on
+/// the environment.
+///
+/// ## Parameters
+///
+/// * `rval` - The exit code returned by the process.
+pub unsafe fn proc_exit(rval: Exitcode) {
+    wasi_snapshot_preview1::proc_exit(rval as i32);
+}
+
+/// Send a signal to the process of the calling thread.
+/// Note: This is similar to `raise` in POSIX.
+///
+/// ## Parameters
+///
+/// * `sig` - The signal condition to trigger.
+pub unsafe fn proc_raise(sig: Signal) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::proc_raise(sig.0 as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Temporarily yield execution of the calling thread.
+/// Note: This is similar to `sched_yield` in POSIX.
+pub unsafe fn sched_yield() -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::sched_yield();
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Write high-quality random data into a buffer.
+/// This function blocks when the implementation is unable to immediately
+/// provide sufficient high-quality random data.
+/// This function may execute slowly, so when large mounts of random data are
+/// required, it's advisable to use this function to seed a pseudo-random
+/// number generator, rather than to provide the random data directly.
+///
+/// ## Parameters
+///
+/// * `buf` - The buffer to fill with random data.
+pub unsafe fn random_get(buf: *mut u8, buf_len: Size) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::random_get(buf as i32, buf_len as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Accept a new incoming connection.
+/// Note: This is similar to `accept` in POSIX.
+///
+/// ## Parameters
+///
+/// * `fd` - The listening socket.
+/// * `flags` - The desired values of the file descriptor flags.
+///
+/// ## Return
+///
+/// New socket connection
+pub unsafe fn sock_accept(fd: Fd, flags: Fdflags) -> Result<Fd, Errno> {
+    let mut rp0 = MaybeUninit::<Fd>::uninit();
+    let ret = wasi_snapshot_preview1::sock_accept(fd as i32, flags as i32, rp0.as_mut_ptr() as i32);
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Fd)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Receive a message from a socket.
+/// Note: This is similar to `recv` in POSIX, though it also supports reading
+/// the data into multiple buffers in the manner of `readv`.
+///
+/// ## Parameters
+///
+/// * `ri_data` - List of scatter/gather vectors to which to store data.
+/// * `ri_flags` - Message flags.
+///
+/// ## Return
+///
+/// Number of bytes stored in ri_data and message flags.
+pub unsafe fn sock_recv(
+    fd: Fd,
+    ri_data: IovecArray<'_>,
+    ri_flags: Riflags,
+) -> Result<(Size, Roflags), Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let mut rp1 = MaybeUninit::<Roflags>::uninit();
+    let ret = wasi_snapshot_preview1::sock_recv(
+        fd as i32,
+        ri_data.as_ptr() as i32,
+        ri_data.len() as i32,
+        ri_flags as i32,
+        rp0.as_mut_ptr() as i32,
+        rp1.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok((
+            core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size),
+            core::ptr::read(rp1.as_mut_ptr() as i32 as *const Roflags),
+        )),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Send a message on a socket.
+/// Note: This is similar to `send` in POSIX, though it also supports writing
+/// the data from multiple buffers in the manner of `writev`.
+///
+/// ## Parameters
+///
+/// * `si_data` - List of scatter/gather vectors to which to retrieve data
+/// * `si_flags` - Message flags.
+///
+/// ## Return
+///
+/// Number of bytes transmitted.
+pub unsafe fn sock_send(
+    fd: Fd,
+    si_data: CiovecArray<'_>,
+    si_flags: Siflags,
+) -> Result<Size, Errno> {
+    let mut rp0 = MaybeUninit::<Size>::uninit();
+    let ret = wasi_snapshot_preview1::sock_send(
+        fd as i32,
+        si_data.as_ptr() as i32,
+        si_data.len() as i32,
+        si_flags as i32,
+        rp0.as_mut_ptr() as i32,
+    );
+    match ret {
+        0 => Ok(core::ptr::read(rp0.as_mut_ptr() as i32 as *const Size)),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+/// Shut down socket send and receive channels.
+/// Note: This is similar to `shutdown` in POSIX.
+///
+/// ## Parameters
+///
+/// * `how` - Which channels on the socket to shut down.
+pub unsafe fn sock_shutdown(fd: Fd, how: Sdflags) -> Result<(), Errno> {
+    let ret = wasi_snapshot_preview1::sock_shutdown(fd as i32, how as i32);
+    match ret {
+        0 => Ok(()),
+        _ => Err(Errno(ret as u16)),
+    }
+}
+
+pub mod wasi_snapshot_preview1 {
+    #[link(wasm_import_module = "wasi_snapshot_preview1")]
+    extern "C" {
+        /// Read command-line argument data.
+        /// The size of the array should match that returned by `args_sizes_get`.
+        /// Each argument is expected to be `\0` terminated.
+        pub fn args_get(arg0: i32, arg1: i32) -> i32;
+        /// Return command-line argument data sizes.
+        pub fn args_sizes_get(arg0: i32, arg1: i32) -> i32;
+        /// Read environment variable data.
+        /// The sizes of the buffers should match that returned by `environ_sizes_get`.
+        /// Key/value pairs are expected to be joined with `=`s, and terminated with `\0`s.
+        pub fn environ_get(arg0: i32, arg1: i32) -> i32;
+        /// Return environment variable data sizes.
+        pub fn environ_sizes_get(arg0: i32, arg1: i32) -> i32;
+        /// Return the resolution of a clock.
+        /// Implementations are required to provide a non-zero value for supported clocks. For unsupported clocks,
+        /// return `errno::inval`.
+        /// Note: This is similar to `clock_getres` in POSIX.
+        pub fn clock_res_get(arg0: i32, arg1: i32) -> i32;
+        /// Return the time value of a clock.
+        /// Note: This is similar to `clock_gettime` in POSIX.
+        pub fn clock_time_get(arg0: i32, arg1: i64, arg2: i32) -> i32;
+        /// Provide file advisory information on a file descriptor.
+        /// Note: This is similar to `posix_fadvise` in POSIX.
+        pub fn fd_advise(arg0: i32, arg1: i64, arg2: i64, arg3: i32) -> i32;
+        /// Force the allocation of space in a file.
+        /// Note: This is similar to `posix_fallocate` in POSIX.
+        pub fn fd_allocate(arg0: i32, arg1: i64, arg2: i64) -> i32;
+        /// Close a file descriptor.
+        /// Note: This is similar to `close` in POSIX.
+        pub fn fd_close(arg0: i32) -> i32;
+        /// Synchronize the data of a file to disk.
+        /// Note: This is similar to `fdatasync` in POSIX.
+        pub fn fd_datasync(arg0: i32) -> i32;
+        /// Get the attributes of a file descriptor.
+        /// Note: This returns similar flags to `fsync(fd, F_GETFL)` in POSIX, as well as additional fields.
+        pub fn fd_fdstat_get(arg0: i32, arg1: i32) -> i32;
+        /// Adjust the flags associated with a file descriptor.
+        /// Note: This is similar to `fcntl(fd, F_SETFL, flags)` in POSIX.
+        pub fn fd_fdstat_set_flags(arg0: i32, arg1: i32) -> i32;
+        /// Adjust the rights associated with a file descriptor.
+        /// This can only be used to remove rights, and returns `errno::notcapable` if called in a way that would attempt to add rights
+        pub fn fd_fdstat_set_rights(arg0: i32, arg1: i64, arg2: i64) -> i32;
+        /// Return the attributes of an open file.
+        pub fn fd_filestat_get(arg0: i32, arg1: i32) -> i32;
+        /// Adjust the size of an open file. If this increases the file's size, the extra bytes are filled with zeros.
+        /// Note: This is similar to `ftruncate` in POSIX.
+        pub fn fd_filestat_set_size(arg0: i32, arg1: i64) -> i32;
+        /// Adjust the timestamps of an open file or directory.
+        /// Note: This is similar to `futimens` in POSIX.
+        pub fn fd_filestat_set_times(arg0: i32, arg1: i64, arg2: i64, arg3: i32) -> i32;
+        /// Read from a file descriptor, without using and updating the file descriptor's offset.
+        /// Note: This is similar to `preadv` in POSIX.
+        pub fn fd_pread(arg0: i32, arg1: i32, arg2: i32, arg3: i64, arg4: i32) -> i32;
+        /// Return a description of the given preopened file descriptor.
+        pub fn fd_prestat_get(arg0: i32, arg1: i32) -> i32;
+        /// Return a description of the given preopened file descriptor.
+        pub fn fd_prestat_dir_name(arg0: i32, arg1: i32, arg2: i32) -> i32;
+        /// Write to a file descriptor, without using and updating the file descriptor's offset.
+        /// Note: This is similar to `pwritev` in POSIX.
+        pub fn fd_pwrite(arg0: i32, arg1: i32, arg2: i32, arg3: i64, arg4: i32) -> i32;
+        /// Read from a file descriptor.
+        /// Note: This is similar to `readv` in POSIX.
+        pub fn fd_read(arg0: i32, arg1: i32, arg2: i32, arg3: i32) -> i32;
+        /// Read directory entries from a directory.
+        /// When successful, the contents of the output buffer consist of a sequence of
+        /// directory entries. Each directory entry consists of a `dirent` object,
+        /// followed by `dirent::d_namlen` bytes holding the name of the directory
+        /// entry.
+        /// This function fills the output buffer as much as possible, potentially
+        /// truncating the last directory entry. This allows the caller to grow its
+        /// read buffer size in case it's too small to fit a single large directory
+        /// entry, or skip the oversized directory entry.
+        pub fn fd_readdir(arg0: i32, arg1: i32, arg2: i32, arg3: i64, arg4: i32) -> i32;
+        /// Atomically replace a file descriptor by renumbering another file descriptor.
+        /// Due to the strong focus on thread safety, this environment does not provide
+        /// a mechanism to duplicate or renumber a file descriptor to an arbitrary
+        /// number, like `dup2()`. This would be prone to race conditions, as an actual
+        /// file descriptor with the same number could be allocated by a different
+        /// thread at the same time.
+        /// This function provides a way to atomically renumber file descriptors, which
+        /// would disappear if `dup2()` were to be removed entirely.
+        pub fn fd_renumber(arg0: i32, arg1: i32) -> i32;
+        /// Move the offset of a file descriptor.
+        /// Note: This is similar to `lseek` in POSIX.
+        pub fn fd_seek(arg0: i32, arg1: i64, arg2: i32, arg3: i32) -> i32;
+        /// Synchronize the data and metadata of a file to disk.
+        /// Note: This is similar to `fsync` in POSIX.
+        pub fn fd_sync(arg0: i32) -> i32;
+        /// Return the current offset of a file descriptor.
+        /// Note: This is similar to `lseek(fd, 0, SEEK_CUR)` in POSIX.
+        pub fn fd_tell(arg0: i32, arg1: i32) -> i32;
+        /// Write to a file descriptor.
+        /// Note: This is similar to `writev` in POSIX.
+        pub fn fd_write(arg0: i32, arg1: i32, arg2: i32, arg3: i32) -> i32;
+        /// Create a directory.
+        /// Note: This is similar to `mkdirat` in POSIX.
+        pub fn path_create_directory(arg0: i32, arg1: i32, arg2: i32) -> i32;
+        /// Return the attributes of a file or directory.
+        /// Note: This is similar to `stat` in POSIX.
+        pub fn path_filestat_get(arg0: i32, arg1: i32, arg2: i32, arg3: i32, arg4: i32) -> i32;
+        /// Adjust the timestamps of a file or directory.
+        /// Note: This is similar to `utimensat` in POSIX.
+        pub fn path_filestat_set_times(
+            arg0: i32,
+            arg1: i32,
+            arg2: i32,
+            arg3: i32,
+            arg4: i64,
+            arg5: i64,
+            arg6: i32,
+        ) -> i32;
+        /// Create a hard link.
+        /// Note: This is similar to `linkat` in POSIX.
+        pub fn path_link(
+            arg0: i32,
+            arg1: i32,
+            arg2: i32,
+            arg3: i32,
+            arg4: i32,
+            arg5: i32,
+            arg6: i32,
+        ) -> i32;
+        /// Open a file or directory.
+        /// The returned file descriptor is not guaranteed to be the lowest-numbered
+        /// file descriptor not currently open; it is randomized to prevent
+        /// applications from depending on making assumptions about indexes, since this
+        /// is error-prone in multi-threaded contexts. The returned file descriptor is
+        /// guaranteed to be less than 2**31.
+        /// Note: This is similar to `openat` in POSIX.
+        pub fn path_open(
+            arg0: i32,
+            arg1: i32,
+            arg2: i32,
+            arg3: i32,
+            arg4: i32,
+            arg5: i64,
+            arg6: i64,
+            arg7: i32,
+            arg8: i32,
+        ) -> i32;
+        /// Read the contents of a symbolic link.
+        /// Note: This is similar to `readlinkat` in POSIX.
+        pub fn path_readlink(
+            arg0: i32,
+            arg1: i32,
+            arg2: i32,
+            arg3: i32,
+            arg4: i32,
+            arg5: i32,
+        ) -> i32;
+        /// Remove a directory.
+        /// Return `errno::notempty` if the directory is not empty.
+        /// Note: This is similar to `unlinkat(fd, path, AT_REMOVEDIR)` in POSIX.
+        pub fn path_remove_directory(arg0: i32, arg1: i32, arg2: i32) -> i32;
+        /// Rename a file or directory.
+        /// Note: This is similar to `renameat` in POSIX.
+        pub fn path_rename(arg0: i32, arg1: i32, arg2: i32, arg3: i32, arg4: i32, arg5: i32)
+            -> i32;
+        /// Create a symbolic link.
+        /// Note: This is similar to `symlinkat` in POSIX.
+        pub fn path_symlink(arg0: i32, arg1: i32, arg2: i32, arg3: i32, arg4: i32) -> i32;
+        /// Unlink a file.
+        /// Return `errno::isdir` if the path refers to a directory.
+        /// Note: This is similar to `unlinkat(fd, path, 0)` in POSIX.
+        pub fn path_unlink_file(arg0: i32, arg1: i32, arg2: i32) -> i32;
+        /// Concurrently poll for the occurrence of a set of events.
+        pub fn poll_oneoff(arg0: i32, arg1: i32, arg2: i32, arg3: i32) -> i32;
+        /// Terminate the process normally. An exit code of 0 indicates successful
+        /// termination of the program. The meanings of other values is dependent on
+        /// the environment.
+        pub fn proc_exit(arg0: i32) -> !;
+        /// Send a signal to the process of the calling thread.
+        /// Note: This is similar to `raise` in POSIX.
+        pub fn proc_raise(arg0: i32) -> i32;
+        /// Temporarily yield execution of the calling thread.
+        /// Note: This is similar to `sched_yield` in POSIX.
+        pub fn sched_yield() -> i32;
+        /// Write high-quality random data into a buffer.
+        /// This function blocks when the implementation is unable to immediately
+        /// provide sufficient high-quality random data.
+        /// This function may execute slowly, so when large mounts of random data are
+        /// required, it's advisable to use this function to seed a pseudo-random
+        /// number generator, rather than to provide the random data directly.
+        pub fn random_get(arg0: i32, arg1: i32) -> i32;
+        /// Accept a new incoming connection.
+        /// Note: This is similar to `accept` in POSIX.
+        pub fn sock_accept(arg0: i32, arg1: i32, arg2: i32) -> i32;
+        /// Receive a message from a socket.
+        /// Note: This is similar to `recv` in POSIX, though it also supports reading
+        /// the data into multiple buffers in the manner of `readv`.
+        pub fn sock_recv(arg0: i32, arg1: i32, arg2: i32, arg3: i32, arg4: i32, arg5: i32) -> i32;
+        /// Send a message on a socket.
+        /// Note: This is similar to `send` in POSIX, though it also supports writing
+        /// the data from multiple buffers in the manner of `writev`.
+        pub fn sock_send(arg0: i32, arg1: i32, arg2: i32, arg3: i32, arg4: i32) -> i32;
+        /// Shut down socket send and receive channels.
+        /// Note: This is similar to `shutdown` in POSIX.
+        pub fn sock_shutdown(arg0: i32, arg1: i32) -> i32;
+    }
+}