std:os

Information about the operating system and machine.

Import

import { OS } from "std:os";

Functions

Environment variables, command-line arguments, the working directory and exit are in std:process.

platform(): String

Returns the operating system: "linux", "macos", "windows", "freebsd", "android" and so on, or "unknown".

import { OS } from "std:os";

let plat = OS.platform();
if (plat == "windows") {
    print("Running on Windows");
} else {
    print(`Running on ${plat}`);
}

arch(): String

Returns the CPU architecture: "x86", "x86_64", "arm", "aarch64", or "unknown".

import { OS } from "std:os";

print("Architecture: " + OS.arch());

homedir(): String?

The current user's home directory, or null if it is unknown.

import { OS } from "std:os";

print(OS.homedir());

tmpdir(): String

The directory for temporary files.

import { OS } from "std:os";

let scratch = OS.tmpdir();
print(scratch);

hostname(): String?

The machine's host name, or null if it cannot be found.

import { OS } from "std:os";

print("Host: " + (OS.hostname() ?? "unknown"));

uptime(): Float?

Seconds since the system started, or null on platforms where it is unknown.

import { OS } from "std:os";
import { floor } from "std:math";

let hours = (OS.uptime() ?? 0.0) / 3600.0;
print(`Up for ${floor(hours)} hours`);

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