/**
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* The `os` module provides operating system-related utility methods and
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* properties. It can be accessed using:
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*
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* ```js
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* const os = require('os');
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* ```
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* @see [source](https://github.com/nodejs/node/blob/v17.0.0/lib/os.js)
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*/
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declare module 'os' {
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interface CpuInfo {
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model: string;
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speed: number;
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times: {
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user: number;
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nice: number;
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sys: number;
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idle: number;
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irq: number;
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};
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}
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interface NetworkInterfaceBase {
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address: string;
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netmask: string;
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mac: string;
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internal: boolean;
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cidr: string | null;
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}
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interface NetworkInterfaceInfoIPv4 extends NetworkInterfaceBase {
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family: 'IPv4';
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}
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interface NetworkInterfaceInfoIPv6 extends NetworkInterfaceBase {
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family: 'IPv6';
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scopeid: number;
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}
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interface UserInfo<T> {
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username: T;
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uid: number;
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gid: number;
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shell: T;
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homedir: T;
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}
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type NetworkInterfaceInfo = NetworkInterfaceInfoIPv4 | NetworkInterfaceInfoIPv6;
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/**
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* Returns the host name of the operating system as a string.
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* @since v0.3.3
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*/
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function hostname(): string;
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/**
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* Returns an array containing the 1, 5, and 15 minute load averages.
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*
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* The load average is a measure of system activity calculated by the operating
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* system and expressed as a fractional number.
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*
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* The load average is a Unix-specific concept. On Windows, the return value is
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* always `[0, 0, 0]`.
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* @since v0.3.3
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*/
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function loadavg(): number[];
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/**
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* Returns the system uptime in number of seconds.
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* @since v0.3.3
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*/
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function uptime(): number;
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/**
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* Returns the amount of free system memory in bytes as an integer.
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* @since v0.3.3
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*/
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function freemem(): number;
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/**
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* Returns the total amount of system memory in bytes as an integer.
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* @since v0.3.3
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*/
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function totalmem(): number;
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/**
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* Returns an array of objects containing information about each logical CPU core.
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*
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* The properties included on each object include:
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*
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* ```js
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* [
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* {
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* model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
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* speed: 2926,
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* times: {
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* user: 252020,
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* nice: 0,
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* sys: 30340,
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* idle: 1070356870,
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* irq: 0
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* }
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* },
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* {
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* model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
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* speed: 2926,
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* times: {
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* user: 306960,
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* nice: 0,
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* sys: 26980,
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* idle: 1071569080,
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* irq: 0
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* }
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* },
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* {
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* model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
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* speed: 2926,
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* times: {
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* user: 248450,
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* nice: 0,
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* sys: 21750,
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* idle: 1070919370,
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* irq: 0
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* }
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* },
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* {
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* model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
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* speed: 2926,
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* times: {
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* user: 256880,
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* nice: 0,
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* sys: 19430,
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* idle: 1070905480,
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* irq: 20
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* }
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* },
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* ]
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* ```
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*
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* `nice` values are POSIX-only. On Windows, the `nice` values of all processors
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* are always 0.
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* @since v0.3.3
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*/
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function cpus(): CpuInfo[];
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/**
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* Returns the operating system name as returned by [`uname(3)`](https://linux.die.net/man/3/uname). For example, it
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* returns `'Linux'` on Linux, `'Darwin'` on macOS, and `'Windows_NT'` on Windows.
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*
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* See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for additional information
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* about the output of running [`uname(3)`](https://linux.die.net/man/3/uname) on various operating systems.
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* @since v0.3.3
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*/
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function type(): string;
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/**
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* Returns the operating system as a string.
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*
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* On POSIX systems, the operating system release is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `GetVersionExW()` is used. See
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* [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
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* @since v0.3.3
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*/
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function release(): string;
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/**
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* Returns an object containing network interfaces that have been assigned a
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* network address.
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*
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* Each key on the returned object identifies a network interface. The associated
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* value is an array of objects that each describe an assigned network address.
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*
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* The properties available on the assigned network address object include:
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*
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* ```js
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* {
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* lo: [
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* {
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* address: '127.0.0.1',
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* netmask: '255.0.0.0',
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* family: 'IPv4',
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* mac: '00:00:00:00:00:00',
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* internal: true,
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* cidr: '127.0.0.1/8'
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* },
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* {
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* address: '::1',
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* netmask: 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff',
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* family: 'IPv6',
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* mac: '00:00:00:00:00:00',
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* scopeid: 0,
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* internal: true,
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* cidr: '::1/128'
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* }
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* ],
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* eth0: [
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* {
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* address: '192.168.1.108',
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* netmask: '255.255.255.0',
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* family: 'IPv4',
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* mac: '01:02:03:0a:0b:0c',
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* internal: false,
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* cidr: '192.168.1.108/24'
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* },
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* {
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* address: 'fe80::a00:27ff:fe4e:66a1',
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* netmask: 'ffff:ffff:ffff:ffff::',
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* family: 'IPv6',
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* mac: '01:02:03:0a:0b:0c',
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* scopeid: 1,
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* internal: false,
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* cidr: 'fe80::a00:27ff:fe4e:66a1/64'
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* }
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* ]
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* }
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* ```
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* @since v0.6.0
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*/
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function networkInterfaces(): NodeJS.Dict<NetworkInterfaceInfo[]>;
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/**
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* Returns the string path of the current user's home directory.
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*
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* On POSIX, it uses the `$HOME` environment variable if defined. Otherwise it
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* uses the [effective UID](https://en.wikipedia.org/wiki/User_identifier#Effective_user_ID) to look up the user's home directory.
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*
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* On Windows, it uses the `USERPROFILE` environment variable if defined.
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* Otherwise it uses the path to the profile directory of the current user.
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* @since v2.3.0
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*/
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function homedir(): string;
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/**
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* Returns information about the currently effective user. On POSIX platforms,
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* this is typically a subset of the password file. The returned object includes
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* the `username`, `uid`, `gid`, `shell`, and `homedir`. On Windows, the `uid` and`gid` fields are `-1`, and `shell` is `null`.
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*
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* The value of `homedir` returned by `os.userInfo()` is provided by the operating
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* system. This differs from the result of `os.homedir()`, which queries
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* environment variables for the home directory before falling back to the
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* operating system response.
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*
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* Throws a `SystemError` if a user has no `username` or `homedir`.
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* @since v6.0.0
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*/
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function userInfo(options: { encoding: 'buffer' }): UserInfo<Buffer>;
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function userInfo(options?: { encoding: BufferEncoding }): UserInfo<string>;
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type SignalConstants = {
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[key in NodeJS.Signals]: number;
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};
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namespace constants {
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const UV_UDP_REUSEADDR: number;
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namespace signals {}
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const signals: SignalConstants;
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namespace errno {
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const E2BIG: number;
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const EACCES: number;
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const EADDRINUSE: number;
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const EADDRNOTAVAIL: number;
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const EAFNOSUPPORT: number;
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const EAGAIN: number;
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const EALREADY: number;
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const EBADF: number;
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const EBADMSG: number;
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const EBUSY: number;
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const ECANCELED: number;
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const ECHILD: number;
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const ECONNABORTED: number;
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const ECONNREFUSED: number;
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const ECONNRESET: number;
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const EDEADLK: number;
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const EDESTADDRREQ: number;
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const EDOM: number;
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const EDQUOT: number;
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const EEXIST: number;
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const EFAULT: number;
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const EFBIG: number;
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const EHOSTUNREACH: number;
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const EIDRM: number;
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const EILSEQ: number;
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const EINPROGRESS: number;
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const EINTR: number;
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const EINVAL: number;
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const EIO: number;
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const EISCONN: number;
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const EISDIR: number;
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const ELOOP: number;
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const EMFILE: number;
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const EMLINK: number;
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const EMSGSIZE: number;
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const EMULTIHOP: number;
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const ENAMETOOLONG: number;
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const ENETDOWN: number;
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const ENETRESET: number;
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const ENETUNREACH: number;
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const ENFILE: number;
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const ENOBUFS: number;
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const ENODATA: number;
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const ENODEV: number;
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const ENOENT: number;
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const ENOEXEC: number;
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const ENOLCK: number;
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const ENOLINK: number;
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const ENOMEM: number;
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const ENOMSG: number;
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const ENOPROTOOPT: number;
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const ENOSPC: number;
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const ENOSR: number;
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const ENOSTR: number;
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const ENOSYS: number;
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const ENOTCONN: number;
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const ENOTDIR: number;
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const ENOTEMPTY: number;
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const ENOTSOCK: number;
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const ENOTSUP: number;
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const ENOTTY: number;
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const ENXIO: number;
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const EOPNOTSUPP: number;
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const EOVERFLOW: number;
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const EPERM: number;
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const EPIPE: number;
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const EPROTO: number;
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const EPROTONOSUPPORT: number;
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const EPROTOTYPE: number;
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const ERANGE: number;
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const EROFS: number;
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const ESPIPE: number;
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const ESRCH: number;
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const ESTALE: number;
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const ETIME: number;
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const ETIMEDOUT: number;
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const ETXTBSY: number;
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const EWOULDBLOCK: number;
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const EXDEV: number;
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const WSAEINTR: number;
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const WSAEBADF: number;
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const WSAEACCES: number;
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const WSAEFAULT: number;
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const WSAEINVAL: number;
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const WSAEMFILE: number;
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const WSAEWOULDBLOCK: number;
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const WSAEINPROGRESS: number;
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const WSAEALREADY: number;
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const WSAENOTSOCK: number;
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const WSAEDESTADDRREQ: number;
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const WSAEMSGSIZE: number;
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const WSAEPROTOTYPE: number;
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const WSAENOPROTOOPT: number;
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const WSAEPROTONOSUPPORT: number;
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const WSAESOCKTNOSUPPORT: number;
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const WSAEOPNOTSUPP: number;
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const WSAEPFNOSUPPORT: number;
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const WSAEAFNOSUPPORT: number;
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const WSAEADDRINUSE: number;
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const WSAEADDRNOTAVAIL: number;
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const WSAENETDOWN: number;
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const WSAENETUNREACH: number;
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const WSAENETRESET: number;
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const WSAECONNABORTED: number;
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const WSAECONNRESET: number;
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const WSAENOBUFS: number;
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const WSAEISCONN: number;
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const WSAENOTCONN: number;
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const WSAESHUTDOWN: number;
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const WSAETOOMANYREFS: number;
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const WSAETIMEDOUT: number;
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const WSAECONNREFUSED: number;
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const WSAELOOP: number;
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const WSAENAMETOOLONG: number;
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const WSAEHOSTDOWN: number;
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const WSAEHOSTUNREACH: number;
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const WSAENOTEMPTY: number;
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const WSAEPROCLIM: number;
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const WSAEUSERS: number;
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const WSAEDQUOT: number;
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const WSAESTALE: number;
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const WSAEREMOTE: number;
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const WSASYSNOTREADY: number;
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const WSAVERNOTSUPPORTED: number;
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const WSANOTINITIALISED: number;
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const WSAEDISCON: number;
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const WSAENOMORE: number;
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const WSAECANCELLED: number;
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const WSAEINVALIDPROCTABLE: number;
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const WSAEINVALIDPROVIDER: number;
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const WSAEPROVIDERFAILEDINIT: number;
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const WSASYSCALLFAILURE: number;
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const WSASERVICE_NOT_FOUND: number;
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const WSATYPE_NOT_FOUND: number;
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const WSA_E_NO_MORE: number;
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const WSA_E_CANCELLED: number;
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const WSAEREFUSED: number;
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}
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namespace priority {
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const PRIORITY_LOW: number;
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const PRIORITY_BELOW_NORMAL: number;
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const PRIORITY_NORMAL: number;
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const PRIORITY_ABOVE_NORMAL: number;
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const PRIORITY_HIGH: number;
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const PRIORITY_HIGHEST: number;
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}
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}
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const devNull: string;
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const EOL: string;
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/**
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* Returns the operating system CPU architecture for which the Node.js binary was
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* compiled. Possible values are `'arm'`, `'arm64'`, `'ia32'`, `'mips'`,`'mipsel'`, `'ppc'`, `'ppc64'`, `'s390'`, `'s390x'`, `'x32'`, and `'x64'`.
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*
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* The return value is equivalent to `process.arch`.
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* @since v0.5.0
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*/
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function arch(): string;
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/**
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* Returns a string identifying the kernel version.
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*
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* On POSIX systems, the operating system release is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `RtlGetVersion()` is used, and if it is not
|
* available, `GetVersionExW()` will be used. See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
|
* @since v13.11.0, v12.17.0
|
*/
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function version(): string;
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/**
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* Returns a string identifying the operating system platform. The value is set
|
* at compile time. Possible values are `'aix'`, `'darwin'`, `'freebsd'`,`'linux'`, `'openbsd'`, `'sunos'`, and `'win32'`.
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*
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* The return value is equivalent to `process.platform`.
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*
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* The value `'android'` may also be returned if Node.js is built on the Android
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* operating system. [Android support is experimental](https://github.com/nodejs/node/blob/HEAD/BUILDING.md#androidandroid-based-devices-eg-firefox-os).
|
* @since v0.5.0
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*/
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function platform(): NodeJS.Platform;
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/**
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* Returns the operating system's default directory for temporary files as a
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* string.
|
* @since v0.9.9
|
*/
|
function tmpdir(): string;
|
/**
|
* Returns a string identifying the endianness of the CPU for which the Node.js
|
* binary was compiled.
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*
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* Possible values are `'BE'` for big endian and `'LE'` for little endian.
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* @since v0.9.4
|
*/
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function endianness(): 'BE' | 'LE';
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/**
|
* Returns the scheduling priority for the process specified by `pid`. If `pid` is
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* not provided or is `0`, the priority of the current process is returned.
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* @since v10.10.0
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* @param [pid=0] The process ID to retrieve scheduling priority for.
|
*/
|
function getPriority(pid?: number): number;
|
/**
|
* Attempts to set the scheduling priority for the process specified by `pid`. If`pid` is not provided or is `0`, the process ID of the current process is used.
|
*
|
* The `priority` input must be an integer between `-20` (high priority) and `19`(low priority). Due to differences between Unix priority levels and Windows
|
* priority classes, `priority` is mapped to one of six priority constants in`os.constants.priority`. When retrieving a process priority level, this range
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* mapping may cause the return value to be slightly different on Windows. To avoid
|
* confusion, set `priority` to one of the priority constants.
|
*
|
* On Windows, setting priority to `PRIORITY_HIGHEST` requires elevated user
|
* privileges. Otherwise the set priority will be silently reduced to`PRIORITY_HIGH`.
|
* @since v10.10.0
|
* @param [pid=0] The process ID to set scheduling priority for.
|
* @param priority The scheduling priority to assign to the process.
|
*/
|
function setPriority(priority: number): void;
|
function setPriority(pid: number, priority: number): void;
|
}
|
declare module 'node:os' {
|
export * from 'os';
|
}
|
