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os.js
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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const {
ArrayPrototypePush,
Float64Array,
NumberParseInt,
ObjectDefineProperties,
StringPrototypeSlice,
SymbolToPrimitive,
} = primordials;
const { getTempDir } = internalBinding('credentials');
const constants = internalBinding('constants').os;
const isWindows = process.platform === 'win32';
const {
codes: {
ERR_SYSTEM_ERROR,
},
hideStackFrames,
} = require('internal/errors');
const { validateInt32 } = require('internal/validators');
const {
getAvailableParallelism,
getCPUs,
getFreeMem,
getHomeDirectory: _getHomeDirectory,
getHostname: _getHostname,
getInterfaceAddresses: _getInterfaceAddresses,
getLoadAvg,
getPriority: _getPriority,
getOSInformation: _getOSInformation,
getTotalMem,
getUserInfo,
getUptime: _getUptime,
isBigEndian,
setPriority: _setPriority,
} = internalBinding('os');
function getCheckedFunction(fn) {
return hideStackFrames(function checkError() {
const ctx = {};
const ret = fn(ctx);
if (ret === undefined) {
throw new ERR_SYSTEM_ERROR.HideStackFramesError(ctx);
}
return ret;
});
}
const {
0: type,
1: version,
2: release,
3: machine,
} = _getOSInformation();
const getHomeDirectory = getCheckedFunction(_getHomeDirectory);
const getHostname = getCheckedFunction(_getHostname);
const getInterfaceAddresses = getCheckedFunction(_getInterfaceAddresses);
const getUptime = getCheckedFunction(_getUptime);
/**
* @returns {string}
*/
const getOSRelease = () => release;
/**
* @returns {string}
*/
const getOSType = () => type;
/**
* @returns {string}
*/
const getOSVersion = () => version;
/**
* @returns {string}
*/
const getMachine = () => machine;
getAvailableParallelism[SymbolToPrimitive] = () => getAvailableParallelism();
getFreeMem[SymbolToPrimitive] = () => getFreeMem();
getHostname[SymbolToPrimitive] = () => getHostname();
getOSVersion[SymbolToPrimitive] = () => getOSVersion();
getOSType[SymbolToPrimitive] = () => getOSType();
getOSRelease[SymbolToPrimitive] = () => getOSRelease();
getMachine[SymbolToPrimitive] = () => getMachine();
getHomeDirectory[SymbolToPrimitive] = () => getHomeDirectory();
getTotalMem[SymbolToPrimitive] = () => getTotalMem();
getUptime[SymbolToPrimitive] = () => getUptime();
const kEndianness = isBigEndian ? 'BE' : 'LE';
const avgValues = new Float64Array(3);
/**
* @returns {[number, number, number]}
*/
function loadavg() {
getLoadAvg(avgValues);
return [avgValues[0], avgValues[1], avgValues[2]];
}
/**
* Returns an array of objects containing information about each
* logical CPU core.
* @returns {Array<{
* model: string,
* speed: number,
* times: {
* user: number,
* nice: number,
* sys: number,
* idle: number,
* irq: number,
* },
* }>}
*/
function cpus() {
// [] is a bugfix for a regression introduced in 51cea61
const data = getCPUs() || [];
const result = [];
let i = 0;
while (i < data.length) {
ArrayPrototypePush(result, {
model: data[i++],
speed: data[i++],
times: {
user: data[i++],
nice: data[i++],
sys: data[i++],
idle: data[i++],
irq: data[i++],
},
});
}
return result;
}
/**
* @returns {string}
*/
function arch() {
return process.arch;
}
arch[SymbolToPrimitive] = () => process.arch;
/**
* @returns {string}
*/
function platform() {
return process.platform;
}
platform[SymbolToPrimitive] = () => process.platform;
/**
* @returns {string}
*/
function tmpdir() {
if (isWindows) {
const path = process.env.TEMP ||
process.env.TMP ||
(process.env.SystemRoot || process.env.windir) + '\\temp';
if (path.length > 1 && path[path.length - 1] === '\\' && path[path.length - 2] !== ':') {
return StringPrototypeSlice(path, 0, -1);
}
return path;
}
return getTempDir() || '/tmp';
}
tmpdir[SymbolToPrimitive] = () => tmpdir();
/**
* @returns {'BE' | 'LE'}
*/
function endianness() {
return kEndianness;
}
endianness[SymbolToPrimitive] = () => kEndianness;
// Returns the number of ones in the binary representation of the decimal
// number.
function countBinaryOnes(n) {
// Count the number of bits set in parallel, which is faster than looping
n = n - ((n >>> 1) & 0x55555555);
n = (n & 0x33333333) + ((n >>> 2) & 0x33333333);
return ((n + (n >>> 4) & 0xF0F0F0F) * 0x1010101) >>> 24;
}
function getCIDR(address, netmask, family) {
let >
let split = '.';
let range = 10;
let groupLength = 8;
let hasZeros = false;
let lastPos = 0;
if (family === 'IPv6') {
split = ':';
range = 16;
groupLength = 16;
}
for (let i = 0; i < netmask.length; i++) {
if (netmask[i] !== split) {
if (i + 1 < netmask.length) {
continue;
}
i++;
}
const part = StringPrototypeSlice(netmask, lastPos, i);
lastPos = i + 1;
if (part !== '') {
if (hasZeros) {
if (part !== '0') {
return null;
}
} else {
const binary = NumberParseInt(part, range);
const binaryOnes = countBinaryOnes(binary)
8000
;
ones += binaryOnes;
if (binaryOnes !== groupLength) {
if ((binary & 1) !== 0) {
return null;
}
hasZeros = true;
}
}
}
}
return `${address}/${ones}`;
}
/**
* @returns {Record<string, Array<{
* address: string,
* netmask: string,
* family: 'IPv4' | 'IPv6',
* mac: string,
* internal: boolean,
* scopeid: number,
* cidr: string | null,
* }>>}
*/
function networkInterfaces() {
const data = getInterfaceAddresses();
const result = {};
if (data === undefined)
return result;
for (let i = 0; i < data.length; i += 7) {
const name = data[i];
const entry = {
address: data[i + 1],
netmask: data[i + 2],
family: data[i + 3],
mac: data[i + 4],
internal: data[i + 5],
cidr: getCIDR(data[i + 1], data[i + 2], data[i + 3]),
};
const scopeid = data[i + 6];
if (scopeid !== -1)
entry.scopeid = scopeid;
const existing = result[name];
if (existing !== undefined)
ArrayPrototypePush(existing, entry);
else
result[name] = [entry];
}
return result;
}
/**
* @param {number} [pid=0]
* @param {number} priority
* @returns {void}
*/
function setPriority(pid, priority) {
if (priority === undefined) {
priority = pid;
pid = 0;
}
validateInt32(pid, 'pid');
validateInt32(priority, 'priority', -20, 19);
const ctx = {};
if (_setPriority(pid, priority, ctx) !== 0)
throw new ERR_SYSTEM_ERROR(ctx);
}
/**
* @param {number} [pid=0]
* @returns {number}
*/
function getPriority(pid) {
if (pid === undefined)
pid = 0;
else
validateInt32(pid, 'pid');
const ctx = {};
const priority = _getPriority(pid, ctx);
if (priority === undefined)
throw new ERR_SYSTEM_ERROR(ctx);
return priority;
}
/**
* @param {{ encoding?: string }} [options=utf8] If `encoding` is set to
* `'buffer'`, the `username`, `shell`, and `homedir` values will
* be `Buffer` instances.
* @returns {{
* uid: number,
* gid: number,
* username: string,
* homedir: string,
* shell: string | null,
* }}
*/
function userInfo(options) {
if (typeof options !== 'object')
options = null;
const ctx = {};
const user = getUserInfo(options, ctx);
if (user === undefined)
throw new ERR_SYSTEM_ERROR(ctx);
return user;
}
module.exports = {
arch,
availableParallelism: getAvailableParallelism,
cpus,
endianness,
freemem: getFreeMem,
getPriority,
homedir: getHomeDirectory,
hostname: getHostname,
loadavg,
networkInterfaces,
platform,
release: getOSRelease,
setPriority,
tmpdir,
totalmem: getTotalMem,
type: getOSType,
userInfo,
uptime: getUptime,
version: getOSVersion,
machine: getMachine,
};
ObjectDefineProperties(module.exports, {
constants: {
__proto__: null,
configurable: false,
enumerable: true,
value: constants,
},
EOL: {
__proto__: null,
configurable: true,
enumerable: true,
writable: false,
value: isWindows ? '\r\n' : '\n',
},
devNull: {
__proto__: null,
configurable: true,
enumerable: true,
writable: false,
value: isWindows ? '\\\\.\\nul' : '/dev/null',
},
});