eio_posix 1.2 (latest) · OCaml Package

Low-level API for making POSIX calls directly.

This module provides an effects-based API for calling POSIX functions.

Normally it's better to use the cross-platform Eio APIs instead, which uses these functions automatically where appropriate.

These functions mostly copy the POSIX APIs directly, except that:

They suspend the calling fiber instead of returning EAGAIN or similar.
They handle EINTR by automatically restarting the call.
They wrap Unix.file_descr in Fd, to avoid use-after-close bugs.
They attach new FDs to switches, to avoid resource leaks.

type fd := Eio_unix.Fd.t

type dir_fd =

| Fd of fd
(*
Confined to fd.
*)
| Cwd
(*
Confined to "."
*)
| Fs
(*
Unconfined "."; also allows absolute paths
*)

val await_readable : string -> fd -> unit

val await_writable : string -> fd -> unit

val sleep_until : Mtime.t -> unit

val read : fd -> bytes -> int -> int -> int

val write : fd -> bytes -> int -> int -> int

val socket : 
  sw:Eio.Std.Switch.t ->
  Unix.socket_domain ->
  Unix.socket_type ->
  int ->
  fd

val connect : fd -> Unix.sockaddr -> unit

val accept : sw:Eio.Std.Switch.t -> fd -> fd * Unix.sockaddr

val shutdown : fd -> Unix.shutdown_command -> unit

val recv_msg : fd -> Cstruct.t array -> Unix.sockaddr * int

val recv_msg_with_fds : 
  sw:Eio.Std.Switch.t ->
  max_fds:int ->
  fd ->
  Cstruct.t array ->
  Unix.sockaddr * int * fd list

val send_msg : 
  fd ->
  ?fds:fd list ->
  ?dst:Unix.sockaddr ->
  Cstruct.t array ->
  int

val getrandom : Cstruct.t -> unit

val lseek : fd -> Optint.Int63.t -> [ `Set | `Cur | `End ] -> Optint.Int63.t

val fsync : fd -> unit

val ftruncate : fd -> Optint.Int63.t -> unit

type stat

val create_stat : unit -> stat

val fstat : buf:stat -> fd -> unit

val fstatat : buf:stat -> follow:bool -> dir_fd -> string -> unit

val blksize : stat -> int64

val nlink : stat -> int64

val uid : stat -> int64

val gid : stat -> int64

val ino : stat -> int64

val size : stat -> int64

val rdev : stat -> int64

val dev : stat -> int64

val perm : stat -> int

val mode : stat -> int

val kind : stat -> Eio.File.Stat.kind

val atime_sec : stat -> int64

val ctime_sec : stat -> int64

val mtime_sec : stat -> int64

val atime_nsec : stat -> int

val ctime_nsec : stat -> int

val mtime_nsec : stat -> int

val realpath : string -> string

val read_link : dir_fd -> string -> string

val mkdir : mode:int -> dir_fd -> string -> unit

val unlink : dir:bool -> dir_fd -> string -> unit

val rename : dir_fd -> string -> dir_fd -> string -> unit

val symlink : link_to:string -> dir_fd -> string -> unit

symlink ~link_to dir path will create a new symlink at dir / path linking to link_to.

val readdir : dir_fd -> string -> string array

val readv : fd -> Cstruct.t array -> int

val writev : fd -> Cstruct.t array -> int

val preadv : file_offset:Optint.Int63.t -> fd -> Cstruct.t array -> int

val pwritev : file_offset:Optint.Int63.t -> fd -> Cstruct.t array -> int

val pipe : sw:Eio.Std.Switch.t -> fd * fd

module Open_flags : sig ... end

val openat : 
  sw:Eio.Std.Switch.t ->
  mode:int ->
  dir_fd ->
  string ->
  Open_flags.t ->
  fd

Note: the returned FD is always non-blocking and close-on-exec.

module Process : sig ... end

package eio_posix