# Structure Process

Identifier index | Structure index
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    (* OS.Process -- SML Basis Library *)

    eqtype status

    val success   : status
    val failure   : status

    val system    : string -> status

    val atExit    : (unit -> unit) -> unit
    val exit      : status -> 'a
    val terminate : status -> 'a

    val getEnv    : string -> string option

    (*
       Portable functions for manipulating processes.

       [success] is the unique status value that signifies successful
       termination of a process.  Note: MS DOS (sometimes) believes that
       all processes are successful.

       [failure] is a status value that signifies an error during
       execution of a process.  Note that in contrast to the success
       value, there may be several distinct failure values.

       [system cmd] asks the operating system to execute command cmd, and
       returns a status value.

       [atExit act] registers the action act to be executed when the
       current SML program calls Process.exit.  Actions will be executed
       in reverse order of registration.

       [exit i] executes all registered actions, then terminates the SML
       process with completion code i.

       [terminate i] terminates the SML process with completion code i
       (but without executing the registered actions).

       [getEnv evar] returns SOME s if the environment variable evar is
       defined and is associated with the string s; otherwise NONE.
    *)

Identifier index | Structure index
--- | ---

Moscow ML 2.00