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nodejs-ChildProcess

发表于 更新于

API

api:https://github.com/nodejs/node/blob/v14.17.5/lib/child_process.js
ChildProcess:https://github.com/nodejs/node/blob/v14.17.5/lib/internal/child_process.js

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module.exports = {
  _forkChild,
  ChildProcess,
  exec,
  execFile,
  execFileSync,
  execSync,
  fork,
  spawn,
  spawnSync
};

function _forkChild(fd, serializationMode) {
}

/**
 * Spawns a shell executing the given command.
 * @param {string} command
 * @param {{
 *   cmd?: string;
 *   env?: Object;
 *   encoding?: string;
 *   shell?: string;
 *   signal?: AbortSignal;
 *   timeout?: number;
 *   maxBuffer?: number;
 *   killSignal?: string | number;
 *   uid?: number;
 *   gid?: number;
 *   windowsHide?: boolean;
 *   }} [options]
 * @param {(
 *   error?: Error,
 *   stdout?: string | Buffer,
 *   stderr?: string | Buffer
 *   ) => any} [callback]
 * @returns {ChildProcess}
 */
function exec(command, options, callback) {
}

/**
 * Spawns the specified file as a shell.
 * @param {string} file
 * @param {string[]} [args]
 * @param {{
 *   cwd?: string;
 *   env?: Object;
 *   encoding?: string;
 *   timeout?: number;
 *   maxBuffer?: number;
 *   killSignal?: string | number;
 *   uid?: number;
 *   gid?: number;
 *   windowsHide?: boolean;
 *   windowsVerbatimArguments?: boolean;
 *   shell?: boolean | string;
 *   signal?: AbortSignal;
 *   }} [options]
 * @param {(
 *   error?: Error,
 *   stdout?: string | Buffer,
 *   stderr?: string | Buffer
 *   ) => any} [callback]
 * @returns {ChildProcess}
 */
function execFile(file /* , args, options, callback */) {
  //其他参数使用arguments获取
}

/**
 * Spawns a file as a shell synchronously.
 * @param {string} command
 * @param {string[]} [args]
 * @param {{
 *   cwd?: string;
 *   input?: string | Buffer | TypedArray | DataView;
 *   stdio?: string | Array;
 *   env?: Object;
 *   uid?: number;
 *   gid?: number;
 *   timeout?: number;
 *   killSignal?: string | number;
 *   maxBuffer?: number;
 *   encoding?: string;
 *   windowsHide?: boolean;
 *   shell?: boolean | string;
 *   }} [options]
 * @returns {Buffer | string}
 */
function execFileSync(command, args, options) {
}

/**
 * Spawns a shell executing the given `command` synchronously.
 * @param {string} command
 * @param {{
 *   cwd?: string;
 *   input?: string | Buffer | TypedArray | DataView;
 *   stdio?: string | Array;
 *   env?: Object;
 *   shell?: string;
 *   uid?: number;
 *   gid?: number;
 *   timeout?: number;
 *   killSignal?: string | number;
 *   maxBuffer?: number;
 *   encoding?: string;
 *   windowsHide?: boolean;
 *   }} [options]
 * @returns {Buffer | string}
 */
function execSync(command, options) {
}

/**
 * Spawns a new Node.js process + fork.
 * @param {string} modulePath
 * @param {string[]} [args]
 * @param {{
 *   cwd?: string;
 *   detached?: boolean;
 *   env?: Object;
 *   execPath?: string;
 *   execArgv?: string[];
 *   gid?: number;
 *   serialization?: string;
 *   signal?: AbortSignal;
 *   killSignal?: string | number;
 *   silent?: boolean;
 *   stdio?: Array | string;
 *   uid?: number;
 *   windowsVerbatimArguments?: boolean;
 *   timeout?: number;
 *   }} [options]
 * @returns {ChildProcess}
 */
function fork(modulePath /* , args, options */) {
}

/**
 * Spawns a new process using the given `file`.
 * @param {string} file
 * @param {string[]} [args]
 * @param {{
 *   cwd?: string;
 *   env?: Object;
 *   argv0?: string;
 *   stdio?: Array | string;
 *   detached?: boolean;
 *   uid?: number;
 *   gid?: number;
 *   serialization?: string;
 *   shell?: boolean | string;
 *   windowsVerbatimArguments?: boolean;
 *   windowsHide?: boolean;
 *   signal?: AbortSignal;
 *   timeout?: number;
 *   killSignal?: string | number;
 *   }} [options]
 * @returns {ChildProcess}
 */
function spawn(file, args, options) {
}

/**
 * Spawns a new process synchronously using the given `file`.
 * @param {string} file
 * @param {string[]} [args]
 * @param {{
 *   cwd?: string;
 *   input?: string | Buffer | TypedArray | DataView;
 *   argv0?: string;
 *   stdio?: string | Array;
 *   env?: Object;
 *   uid?: number;
 *   gid?: number;
 *   timeout?: number;
 *   killSignal?: string | number;
 *   maxBuffer?: number;
 *   encoding?: string;
 *   shell?: boolean | string;
 *   windowsVerbatimArguments?: boolean;
 *   windowsHide?: boolean;
 *   }} [options]
 * @returns {{
 *   pid: number;
 *   output: Array;
 *   stdout: Buffer | string;
 *   stderr: Buffer | string;
 *   status: number | null;
 *   signal: string | null;
 *   error: Error;
 *   }}
 */
function spawnSync(file, args, options) {
}

DEMO

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const {spawn, exec, execFile} = require('child_process');

const ls = spawn('ls', ['-lh', '/Users/juneleo']);
ls.stdout.on('data', (data) => {
    console.log(`stdout: ${data}`);
});

ls.stderr.on('data', (data) => {
    console.error(`stderr: ${data}`);
});

ls.on('close', (code) => {
    console.log(`child process exited with code ${code}`);
});

exec('cat test.js')

exec('cat test.js', (error, stdout, stderr) => {
    if (error) {
        console.error(`exec error: ${error}`);
        return;
    }
    console.log(`stdout: ${stdout}`);
    console.error(`stderr: ${stderr}`);
});

execFile("/Users/juneleo/demo/web-demo/child_process.sh", {shell: 'sh'}, (error, stdout, stderr) => {
    if (error) {
        throw error;
    }
    console.log(stdout);
});