Types

Types and constants exported by the MacOS module.

Module: MacOS

StdHandle

Identifies one of the process's standard devices.

enum StdHandle: uint32 {
    Error  = 0xFFFFFFF4,
    Output = 0xFFFFFFF5,
    Input  = 0xFFFFFFF6
}

Member	macOS descriptor	Description
Error	2	Standard error.
Output	1	Standard output.
Input	0	Standard input.

Pass a member to GetStdHandle. The values mirror the Win32 standard-handle constants because the Rux linker exposes a compatibility API; the returned values are macOS BSD file descriptors encoded as pointers.

WARNING

The handle for Input may compare equal to null because descriptor 0 is encoded as a pointer. It is still a valid standard-input handle.

Example

import MacOS::{ GetStdHandle, StdHandle };

let input = GetStdHandle(StdHandle::Input);
let output = GetStdHandle(StdHandle::Output);
let error = GetStdHandle(StdHandle::Error);

See also

• Console and I/O — operations that use standard handles