`sig
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
val read : Unix.file_descr -> bytes -> int -> int -> int
val write : Unix.file_descr -> bytes -> int -> int -> int
val write_substring : Unix.file_descr -> string -> int -> int -> int
val timed_read : Unix.file_descr -> bytes -> int -> int -> float -> int
val timed_write : Unix.file_descr -> bytes -> int -> int -> float -> int
val timed_write_substring :
Unix.file_descr -> string -> int -> int -> float -> int
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
val pipe : unit -> Unix.file_descr * Unix.file_descr
val open_process_in : string -> Pervasives.in_channel
val open_process_out : string -> Pervasives.out_channel
val open_process : string -> Pervasives.in_channel * Pervasives.out_channel
val sleep : int -> unit
val socket :
Unix.socket_domain -> Unix.socket_type -> int -> Unix.file_descr
val accept : 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 -> Pervasives.in_channel * Pervasives.out_channel
end`