(**************************************************************************)
(*                                                                        *)
(*                                 OCaml                                  *)
(*                                                                        *)
(*             Xavier Leroy, projet Cristal, INRIA Rocquencourt           *)
(*                                                                        *)
(*   Copyright 1996 Institut National de Recherche en Informatique et     *)
(*     en Automatique.                                                    *)
(*                                                                        *)
(*   All rights reserved.  This file is distributed under the terms of    *)
(*   the GNU Lesser General Public License version 2.1, with the          *)
(*   special exception on linking described in the file LICENSE.          *)
(*                                                                        *)
(**************************************************************************)

(** Thread-compatible system calls.

   @deprecated The functionality of this module has been merged back into
   the {!Unix} module.  Threaded programs can now call the functions
   from module {!Unix} directly, and still get the correct behavior
   (block the calling thread, if required, but do not block all threads
   in the process).  *)

(** {6 Process handling} *)

val execv : string -> string array -> unit
val execve : string -> string array -> string array -> unit
val execvp : string -> string array -> unit
val wait : unit -> int * Unix.process_status
val waitpid : Unix.wait_flag list -> int -> int * Unix.process_status
val system : string -> Unix.process_status

(** {6 Basic input/output} *)

val read : Unix.file_descr -> bytes -> int -> int -> int
val write : Unix.file_descr -> bytes -> int -> int -> int
val single_write : Unix.file_descr -> bytes -> int -> int -> int
val write_substring : Unix.file_descr -> string -> int -> int -> int
val single_write_substring : Unix.file_descr -> string -> int -> int -> int

(** {6 Input/output with timeout} *)

val timed_read : Unix.file_descr -> bytes -> int -> int -> float -> int
(** See {!ThreadUnix.timed_write}. *)

val timed_write : Unix.file_descr -> bytes -> int -> int -> float -> int
(** Behave as {!ThreadUnix.read} and {!ThreadUnix.write}, except that
   [Unix_error(ETIMEDOUT,_,_)] is raised if no data is
   available for reading or ready for writing after [d] seconds.
   The delay [d] is given in the fifth argument, in seconds. *)

val timed_write_substring :
      Unix.file_descr -> string -> int -> int -> float -> int
(** See {!ThreadUnix.timed_write}. *)

(** {6 Polling} *)

val select :
  Unix.file_descr list -> Unix.file_descr list -> Unix.file_descr list ->
    float ->
    Unix.file_descr list * Unix.file_descr list * Unix.file_descr list

(** {6 Pipes and redirections} *)

val pipe : ?cloexec:bool -> unit -> Unix.file_descr * Unix.file_descr
val open_process_in : string -> in_channel
val open_process_out : string -> out_channel
val open_process : string -> in_channel * out_channel
val open_process_full :
  string -> string array -> in_channel * out_channel * in_channel

(** {6 Time} *)

val sleep : int -> unit

(** {6 Sockets} *)

val socket :
  ?cloexec:bool -> Unix.socket_domain -> Unix.socket_type -> int ->
    Unix.file_descr
val socketpair :
  ?cloexec:bool -> Unix.socket_domain -> Unix.socket_type -> int ->
    Unix.file_descr * Unix.file_descr
val accept :
  ?cloexec:bool -> Unix.file_descr -> Unix.file_descr * Unix.sockaddr
val connect : Unix.file_descr -> Unix.sockaddr -> unit
val recv :
  Unix.file_descr -> bytes -> int -> int -> Unix.msg_flag list -> int
val recvfrom :
  Unix.file_descr -> bytes -> int -> int -> Unix.msg_flag list ->
    int * Unix.sockaddr
val send :
  Unix.file_descr -> bytes -> int -> int -> Unix.msg_flag list -> int
val send_substring :
  Unix.file_descr -> string -> int -> int -> Unix.msg_flag list -> int
val sendto :
  Unix.file_descr -> bytes -> int -> int -> Unix.msg_flag list ->
    Unix.sockaddr -> int
val sendto_substring :
  Unix.file_descr -> string -> int -> int -> Unix.msg_flag list ->
    Unix.sockaddr -> int
val open_connection : Unix.sockaddr -> in_channel * out_channel
val establish_server :
  (in_channel -> out_channel -> unit) -> Unix.sockaddr -> unit