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//! Rusty WASI type definitions based on //! [the spec](https://github.com/CraneStation/wasmtime/blob/master/docs/WASI-api.md) #![feature(non_exhaustive)] #[macro_use] extern crate bitflags; #[macro_use] extern crate proper; /// File or memory access pattern advisory information. #[repr(u8)] #[derive(Clone, Copy, PartialEq, Prim)] pub enum Advice { /// The application has no advice to give on its behavior with respect to the specified data. Normal, /// The application expects to access the data sequentially from lower to higher offsets. Sequential, /// The application expects to access the specified data in a random order. Random, /// The application expects that it will not access the specified data in the near future. DontNeed, /// The application expects to access the specified data once and then not reuse it thereafter. NoReuse, /// The application expects to access the specified data in the near future. WillNeed, } /// Identifiers for clocks. #[repr(u8)] #[derive(Clone, Copy, PartialEq, Prim)] pub enum ClockId { /// The clock measuring real time. Time value zero corresponds with 1970-01-01T00:00:00Z. RealTime, /// 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. Monotonic, /// The CPU-time clock associated with the current process. ProcessCpuTime, /// The CPU-time clock associated with the current thread. ThreadCpuTime, } /// Identifier for a device containing a file system. Can be used in combination with `Inode` /// to uniquely identify a file or directory in the filesystem. #[repr(C)] #[derive(Clone, Copy, Debug, PartialEq, Eq, Prim)] pub struct Device(u64); /// A reference to the offset of a directory entry. #[repr(C)] #[derive(Clone, Copy, Debug, PartialEq, Eq, Prim)] pub struct DirCookie(u64); impl DirCookie { /// Creates a new `DirCookie` repreenting a permanent reference to the first directory entry /// within a directory. pub fn start() -> Self { DirCookie(0) } } /// A directory entry. #[repr(C)] #[derive(Clone, Copy, PartialEq, Eq)] pub struct DirEnt { /// The offset of the next directory entry stored in this directory. pub next: DirCookie, /// The serial number of the file referred to by this directory entry. pub inode: Inode, /// The length of the name of the directory entry. pub name_len: u32, /// The type of the file referred to by this directory entry. pub file_type: FileType, } /// Error codes returned by functions. #[repr(u16)] #[derive(Clone, Copy, Debug, PartialEq, Eq, Prim)] #[prim(ty = "u16")] #[non_exhaustive] pub enum ErrNo { /// No error occurred. System call completed successfully. Success, /// Argument list too long. TooBig, /// Permission denied. Access, /// Address in use. AddrInUse, /// Address not available. AddrNotAvail, /// Address family not supported. AfNoSupport, /// Resource unavailable, or operation would block. Again, /// Connection already in progress. Already, /// Bad file descriptor. BadF, /// Bad message. BadMsg, /// Device or resource busy. Busy, /// Operation canceled. Canceled, /// No child processes. Child, /// Connection aborted. ConnAborted, /// Connection refused. ConnRefused, /// Connection reset. ConnReset, /// Resource deadlock would occur. Deadlk, /// Destination address required. DestAddrReq, /// Mathematics argument out of domain of function. Domain, /// Reserved. (Quota exceeded.) DQuot, /// File exists. Exist, /// Bad address. Fault, /// File too large. FBig, /// Host is unreachable. HostUnreach, /// Identifier removed. IdRm, /// Illegal byte sequence. IlSeq, /// Operation in progress. InProgress, /// Interrupted function. Intr, /// Invalid argument. Inval, /// I/O error. Io, /// Socket is connected. IsConn, /// Is a directory. IsDir, /// Too many levels of symbolic links. Loop, /// File descriptor value too large. MFile, /// Too many links. MLink, /// Message too large. MsgSize, /// Reserved. (Multihop attempted.) Multihop, /// Filename too long. NameTooLong, /// Network is down. NetDown, /// Connection aborted by network. NetReset, /// Network unreachable. NetUnreach, /// Too many files open in system. NFile, /// No buffer space available. NoBufS, /// No such device. NoDev, /// No such file or directory. NoEnt, /// Executable file format error. NoExec, /// No locks available. NoLock, /// Reserved. (Link has been severed.) NoLink, /// Not enough space. NoMem, /// No message of the desired type. NoMsg, /// Protocol not available. NoProtoOpt, /// No space left on device. NoSpace, /// Function not supported. (Always unsupported.) NoSys, /// The socket is not connected. NotConn, /// Not a directory or a symbolic link to a directory. NotDir, /// Directory not empty. NotEmpty, /// State not recoverable. NotRecoverable, /// Not a socket. NotSock, /// Not supported, or operation not supported on socket. (Transient unsupported.) NotSup, /// Inappropriate I/O control operation. NoTty, /// No such device or address. NxIo, /// Value too large to be stored in data type. Overflow, /// Previous owner died. OwnerDead, /// Operation not permitted. Perm, /// Broken pipe. Pipe, /// Protocol error. Proto, /// Protocol not supported. ProtoNoSupport, /// Protocol wrong type for socket. ProtoType, /// Result too large. Range, /// Read-only file system. RoFs, /// Invalid seek. SPipe, /// No such process. Srch, /// Reserved. (Stale file handle.) Stale, /// Connection timed out. TimedOut, /// Text file busy. TxtBsy, /// Cross-device link. XDev, /// Extension: Capabilities insufficient. NotCapable, } impl From<std::io::Error> for ErrNo { fn from(err: std::io::Error) -> Self { use std::io::ErrorKind; use ErrNo::*; match err.kind() { ErrorKind::NotFound => NoEnt, ErrorKind::PermissionDenied => Access, ErrorKind::ConnectionRefused => ConnRefused, ErrorKind::ConnectionReset => ConnReset, ErrorKind::ConnectionAborted => ConnAborted, ErrorKind::NotConnected => NotConn, ErrorKind::AddrInUse => AddrInUse, ErrorKind::AddrNotAvailable => AddrNotAvail, ErrorKind::BrokenPipe => Pipe, ErrorKind::AlreadyExists => Exist, ErrorKind::WouldBlock => Again, ErrorKind::InvalidInput | ErrorKind::InvalidData => Inval, ErrorKind::TimedOut => TimedOut, ErrorKind::Interrupted => Intr, ErrorKind::WriteZero | ErrorKind::Other | ErrorKind::UnexpectedEof | _ => Io, // _ => , } } } #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub struct Event { pub user_data: UserData, pub error: ErrNo, pub ty: EventType, pub fd_state: Option<EventFdState>, // only valid when `ty \in {FdRead, FdWrite}` } #[repr(u8)] #[derive(Clone, Copy, Debug, PartialEq, Eq, Prim)] pub enum EventType { /// The time value of clock `SubscriptionType::clock.clock_id` has reached timestamp /// `Subscription::clock.timeout`. Clock, /// File descriptor `SubscriptionType::FdRw.fd` has data available for reading. /// This event always triggers for regular files. FdRead, /// File descriptor `SubscriptionType::FdRw.fd` has capacity available for writing. /// This event always triggers for regular files. FdWrite, } /// The state of the file descriptor subscribed to with `EventType::FdRead` or `EventType::FdWrite`. #[repr(u16)] #[derive(Clone, Copy, Debug, PartialEq, Eq, Prim)] #[prim(ty = "u16")] pub enum EventRwFlags { None, Hangup, } pub type ExitCode = u32; #[repr(C)] #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub struct EventFdState { pub file_size: FileSize, pub flags: EventRwFlags, } /// A file descriptor number. /// As in POSIX, 0, 1, and 2 are stdin, stdout, and stderr, respectively. /// File descriptors are not guaranteed to be contiguous or allocated in ascending order. /// Information about a file descriptor may be obtained through `fd_prestat_get`. #[repr(C)] #[derive(Clone, Copy, Debug, PartialEq, Eq, Prim)] pub struct Fd(u32); bitflags! { #[derive(Default)] pub struct FdFlags: u16 { /// Append mode: Data written to the file is always appended to the file's end. const APPEND = 1 << 0; /// Write according to synchronized I/O data integrity completion. /// Only the data stored in the file is synchronized. const DSYNC = 1 << 1; /// Non-blocking mode. const NONBLOCK = 1 << 2; /// Synchronized read I/O operations. const RSYNC = 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. const SYNC = 1 << 4; } } bitflags! { #[derive(Default)] pub struct OpenFlags: u16 { /// Create file if it does not exist. const CREATE = 1 << 0; /// Fail if not a directory. const DIRECTORY = 1 << 1; /// Fail if file already exists. const EXCL = 1 << 2; /// Truncate file to size 0. const TRUNC = 1 << 3; } } #[repr(C)] #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub struct FdStat { pub file_type: FileType, pub flags: FdFlags, /// Rights that apply to this file descriptor. pub rights_base: Rights, /// Maximum set of rights that may be installed on new file descriptors that are created /// through this file descriptor. pub rights_inheriting: Rights, } /// Relative offset within a file. pub type FileDelta = i64; /// The type of a file descriptor or file. #[repr(u8)] #[derive(Clone, Copy, Debug, PartialEq, Eq, Prim)] pub enum FileType { Unknown, BlockDevice, CharacterDevice, Directory, RegularFile, SocketDgram, SocketStream, SymbolicLink, } pub type FileSize = u64; /// File attributes. #[derive(Clone, Copy, Debug, PartialEq, Eq)] #[repr(C)] pub struct FileStat { pub device: Device, pub inode: Inode, pub file_type: FileType, pub num_links: LinkCount, pub file_size: FileSize, pub atime: Timestamp, pub mtime: Timestamp, pub ctime: Timestamp, } /// File serial number that is unique within its file system. #[derive(Clone, Copy, Debug, PartialEq, Eq, Prim)] pub struct Inode(u64); pub type Size = u32; pub type Pointer = u32; /// A region of memory for scatter/gather reads. #[repr(C)] #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub struct IoVec { pub buf: Pointer, pub len: Size, } /// Number of hard links to an inode. pub type LinkCount = u32; bitflags! { #[derive(Default)] pub struct LookupFlags: u32 { /// Follow symlinks. const SYMLINK_FOLLOW = 1 << 0; } } /// Information about a preopened resource. #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub struct Prestat { pub resource_type: PreopenType, } #[repr(C)] #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub enum PreopenType { Dir { name_len: Size }, } bitflags! { #[derive(Default)] pub struct Rights: u64 { const FD_DATASYNC = 1 << 0; const FD_READ = 1 << 1; const FD_SEEK = 1 << 2; const FD_FDSTAT_SET_FLAGS = 1 << 3; const FD_SYNC = 1 << 4; const FD_TELL = 1 << 5; const FD_WRITE = 1 << 6; const FD_ADVISE = 1 << 7; const FD_ALLOCATE = 1 << 8; const PATH_CREATE_DIRECTORY = 1 << 9; const PATH_CREATE_FILE = 1 << 10; const PATH_LINK_SOURCE = 1 << 11; const PATH_LINK_TARGET = 1 << 12; const PATH_OPEN = 1 << 13; const FD_READDIR = 1 << 14; const PATH_READLINK = 1 << 15; const PATH_RENAME_SOURCE = 1 << 16; const PATH_RENAME_TARGET = 1 << 17; const PATH_FILESTAT_GET = 1 << 18; const PATH_FILESTAT_SET_SIZE = 1 << 19; const PATH_FILESTAT_SET_TIMES = 1 << 20; const FD_FILESTAT_GET = 1 << 21; const FD_FILESTAT_SET_SIZE = 1 << 22; const FD_FILESTAT_SET_TIMES = 1 << 23; const PATH_SYMLINK = 1 << 24; const PATH_REMOVE_DIRECTORY = 1 << 25; const PATH_UNLINK_FILE = 1 << 26; const POLL_FD_READWRITE = 1 << 27; } } /// Signal condition. #[repr(u8)] #[derive(Clone, Copy, PartialEq, Prim)] pub enum Signal { Reserved, Abort, Alarm, Bus, Child, Cont, FP, Hup, Ill, Int, Kill, Pipe, Quit, Seg, Stop, Sys, Term, Trap, TStp, TTIn, TTOut, Urg, Usr1, Usr2, VTAlrm, XCpu, XFSz, } /// Timestamp in nanoseconds. #[derive(Prim, Clone, Copy, Debug, PartialEq, Eq)] pub struct Timestamp(u64); impl Timestamp { pub fn from_nanos(nanos: u64) -> Self { Timestamp(nanos) } pub fn from_sec(sec: u64) -> Self { Self::from_nanos(sec * 1_000_000_000) } pub fn as_nanos(&self) -> u64 { self.0 } } bitflags! { pub struct SetTimeFlags: u16 { const ATIME = 1 << 0; const ATIME_NOW = 1 << 1; const MTIME = 1 << 2; const MTIME_NOW = 1 << 3; } } pub type UserData = u64; /// The position relative to which to set the offset of the file descriptor. #[repr(u8)] #[derive(Clone, Copy, Debug, PartialEq, Prim)] pub enum Whence { Current, End, Start, }