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246 lines
6.1 KiB
246 lines
6.1 KiB
var util = require('util');
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var EventEmitter = require('events').EventEmitter;
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var Stream = require('net').Stream;
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var InternalChildProcess = process.binding('child_process').ChildProcess;
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var constants;
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var spawn = exports.spawn = function(path, args /*, options, customFds */) {
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var child = new ChildProcess();
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child.spawn.apply(child, arguments);
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return child;
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};
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exports.exec = function(command /*, options, callback */) {
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var _slice = Array.prototype.slice;
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var args = ['/bin/sh', ['-c', command]].concat(_slice.call(arguments, 1));
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return exports.execFile.apply(this, args);
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};
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// execFile('something.sh', { env: ENV }, function() { })
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exports.execFile = function(file /* args, options, callback */) {
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var options = { encoding: 'utf8',
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timeout: 0,
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maxBuffer: 200 * 1024,
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killSignal: 'SIGTERM',
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setsid: false,
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cwd: null,
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env: null };
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var args, optionArg, callback;
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// Parse the parameters.
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if (typeof arguments[arguments.length - 1] === 'function') {
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callback = arguments[arguments.length - 1];
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}
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if (Array.isArray(arguments[1])) {
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args = arguments[1];
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if (typeof arguments[2] === 'object') optionArg = arguments[2];
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} else {
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args = [];
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if (typeof arguments[1] === 'object') optionArg = arguments[1];
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}
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// Merge optionArg into options
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if (optionArg) {
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var keys = Object.keys(options);
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for (var i = 0, len = keys.length; i < len; i++) {
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var k = keys[i];
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if (optionArg[k] !== undefined) options[k] = optionArg[k];
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}
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}
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var child = spawn(file, args, {cwd: options.cwd, env: options.env});
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var stdout = '';
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var stderr = '';
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var killed = false;
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var exited = false;
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var timeoutId;
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function exithandler(code, signal) {
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if (exited) return;
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exited = true;
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if (timeoutId) {
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clearTimeout(timeoutId);
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timeoutId = null;
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}
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if (!callback) return;
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if (code === 0 && signal === null) {
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callback(null, stdout, stderr);
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} else {
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var e = new Error('Command failed: ' + stderr);
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e.killed = child.killed || killed;
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e.code = code;
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e.signal = signal;
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callback(e, stdout, stderr);
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}
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}
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function kill() {
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killed = true;
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child.kill(options.killSignal);
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process.nextTick(function() {
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exithandler(null, options.killSignal);
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});
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}
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if (options.timeout > 0) {
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timeoutId = setTimeout(function() {
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kill();
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timeoutId = null;
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}, options.timeout);
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}
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child.stdout.setEncoding(options.encoding);
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child.stderr.setEncoding(options.encoding);
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child.stdout.addListener('data', function(chunk) {
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stdout += chunk;
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if (stdout.length > options.maxBuffer) {
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kill();
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}
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});
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child.stderr.addListener('data', function(chunk) {
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stderr += chunk;
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if (stderr.length > options.maxBuffer) {
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kill();
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}
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});
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child.addListener('exit', exithandler);
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return child;
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};
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function ChildProcess() {
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EventEmitter.call(this);
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var self = this;
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this.killed = false;
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var gotCHLD = false;
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var exitCode;
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var termSignal;
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var internal = this._internal = new InternalChildProcess();
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var stdin = this.stdin = new Stream();
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var stdout = this.stdout = new Stream();
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var stderr = this.stderr = new Stream();
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var stderrClosed = false;
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var stdoutClosed = false;
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stderr.addListener('close', function() {
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stderrClosed = true;
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if (gotCHLD && (!self.stdout || stdoutClosed)) {
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self.emit('exit', exitCode, termSignal);
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}
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});
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stdout.addListener('close', function() {
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stdoutClosed = true;
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if (gotCHLD && (!self.stderr || stderrClosed)) {
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self.emit('exit', exitCode, termSignal);
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}
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});
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internal.onexit = function(code, signal) {
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gotCHLD = true;
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exitCode = code;
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termSignal = signal;
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if (self.stdin) {
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self.stdin.end();
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}
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if ((!self.stdout || !self.stdout.readable) &&
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(!self.stderr || !self.stderr.readable)) {
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self.emit('exit', exitCode, termSignal);
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}
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};
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this.__defineGetter__('pid', function() { return internal.pid; });
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}
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util.inherits(ChildProcess, EventEmitter);
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ChildProcess.prototype.kill = function(sig) {
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if (this._internal.pid) {
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this.killed = true;
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if (!constants) constants = process.binding('constants');
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sig = sig || 'SIGTERM';
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if (!constants[sig]) throw new Error('Unknown signal: ' + sig);
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return this._internal.kill(constants[sig]);
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}
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};
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ChildProcess.prototype.spawn = function(path, args, options, customFds) {
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args = args || [];
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var cwd, env, setuid;
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if (!options || options.cwd === undefined &&
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options.env === undefined &&
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options.customFds === undefined) {
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// Deprecated API: (path, args, options, env, customFds)
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cwd = '';
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env = options || process.env;
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customFds = customFds || [-1, -1, -1];
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setuid = false;
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} else {
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// Recommended API: (path, args, options)
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cwd = options.cwd || '';
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env = options.env || process.env;
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customFds = options.customFds || [-1, -1, -1];
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setuid = options.setuid ? true : false;
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}
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var envPairs = [];
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var keys = Object.keys(env);
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for (var index = 0, keysLength = keys.length; index < keysLength; index++) {
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var key = keys[index];
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envPairs.push(key + '=' + env[key]);
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}
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var fds = this._internal.spawn(path,
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args,
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cwd,
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envPairs,
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customFds,
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setuid);
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this.fds = fds;
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if (customFds[0] === -1 || customFds[0] === undefined) {
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this.stdin.open(fds[0]);
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this.stdin.writable = true;
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this.stdin.readable = false;
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} else {
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this.stdin = null;
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}
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if (customFds[1] === -1 || customFds[1] === undefined) {
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this.stdout.open(fds[1]);
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this.stdout.writable = false;
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this.stdout.readable = true;
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this.stdout.resume();
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} else {
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this.stdout = null;
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}
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if (customFds[2] === -1 || customFds[2] === undefined) {
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this.stderr.open(fds[2]);
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this.stderr.writable = false;
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this.stderr.readable = true;
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this.stderr.resume();
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} else {
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this.stderr = null;
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}
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};
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