node/src/node.js at master · Nase/node · GitHub

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// Hello, and welcome to hacking node.js!

// This file is invoked by node::Load in src/node.cc, and responsible for

// bootstrapping the node.js core. Special caution is given to the performance

// of the startup process, so many dependencies are invoked lazily.

(function(process) {

global = this;

function startup() {

startup.globalVariables();

startup.globalTimeouts();

startup.globalConsole();

startup.processAssert();

startup.processNextTick();

startup.processStdio();

startup.processKillAndExit();

startup.processSignalHandlers();

startup.removedMethods();

startup.resolveArgv0();

if (startup.runThirdPartyMain()) {

return;

}

if (startup.runDebugger()) {

return;

}

if (startup.runScript()) {

return;

}

if (startup.runEval()) {

return;

}

startup.runRepl();

}

startup.globalVariables = function() {

global.process = process;

global.global = global;

global.GLOBAL = global;

global.root = global;

global.Buffer = NativeModule.require('buffer').Buffer;

};

startup.globalTimeouts = function() {

global.setTimeout = function() {

var t = NativeModule.require('timers');

return t.setTimeout.apply(this, arguments);

};

global.setInterval = function() {

var t = NativeModule.require('timers');

return t.setInterval.apply(this, arguments);

};

global.clearTimeout = function() {

var t = NativeModule.require('timers');

return t.clearTimeout.apply(this, arguments);

};

global.clearInterval = function() {

var t = NativeModule.require('timers');

return t.clearInterval.apply(this, arguments);

};

startup.globalConsole = function() {

global.__defineGetter__('console', function() {

return NativeModule.require('console');

});

};

startup._lazyConstants = null;

startup.lazyConstants = function() {

if (!startup._lazyConstants) {

startup._lazyConstants = process.binding('constants');

}

return startup._lazyConstants;

};

var assert;

startup.processAssert = function() {

// Note that calls to assert() are pre-processed out by JS2C for the

// normal build of node. They persist only in the node_g build.

// Similarly for debug().

assert = process.assert = function(x, msg) {

if (!x) throw new Error(msg || 'assertion error');

};

startup.processNextTick = function() {

var nextTickQueue = [];

process._tickCallback = function() {

var l = nextTickQueue.length;

if (l === 0) return;

try {

for (var i = 0; i < l; i++) {

nextTickQueue[i]();

}

catch (e) {

nextTickQueue.splice(0, i + 1);

if (i + 1 < l) {

process._needTickCallback();

}

throw e; // process.nextTick error, or 'error' event on first tick

}

nextTickQueue.splice(0, l);

};

process.nextTick = function(callback) {

nextTickQueue.push(callback);

process._needTickCallback();

};

startup.processStdio = function() {

var stdout, stdin;

process.__defineGetter__('stdout', function() {

if (stdout) return stdout;

var binding = process.binding('stdio'),

net = NativeModule.require('net'),

fs = NativeModule.require('fs'),

tty = NativeModule.require('tty'),

fd = binding.stdoutFD;

if (binding.isatty(fd)) {

stdout = new tty.WriteStream(fd);

} else if (binding.isStdoutBlocking()) {

stdout = new fs.WriteStream(null, {fd: fd});

} else {

stdout = new net.Stream(fd);

// FIXME Should probably have an option in net.Stream to create a

// stream from an existing fd which is writable only. But for now

// we'll just add this hack and set the `readable` member to false.

// Test: ./node test/fixtures/echo.js < /etc/passwd

stdout.readable = false;

}

return stdout;

});

process.__defineGetter__('stdin', function() {

if (stdin) return stdin;

var binding = process.binding('stdio'),

net = NativeModule.require('net'),

fs = NativeModule.require('fs'),

tty = NativeModule.require('tty'),

fd = binding.openStdin();

if (binding.isatty(fd)) {

stdin = new tty.ReadStream(fd);

} else if (binding.isStdinBlocking()) {

stdin = new fs.ReadStream(null, {fd: fd});

} else {

stdin = new net.Stream(fd);

stdin.readable = true;

}

return stdin;

});

process.openStdin = function() {

process.stdin.resume();

return process.stdin;

};

startup.processKillAndExit = function() {

process.exit = function(code) {

process.emit('exit', code || 0);

process.reallyExit(code || 0);

};

process.kill = function(pid, sig) {

sig = sig || 'SIGTERM';

if (!startup.lazyConstants()[sig]) {

throw new Error('Unknown signal: ' + sig);

}

process._kill(pid, startup.lazyConstants()[sig]);

};

startup.processSignalHandlers = function() {

// Load events module in order to access prototype elements on process like

// process.addListener.

var events = NativeModule.require('events');

var signalWatchers = {};

var addListener = process.addListener;

var removeListener = process.removeListener;

function isSignal(event) {

return event.slice(0, 3) === 'SIG' && startup.lazyConstants()[event];

}

// Wrap addListener for the special signal types

process.on = process.addListener = function(type, listener) {

var ret = addListener.apply(this, arguments);

if (isSignal(type)) {

if (!signalWatchers.hasOwnProperty(type)) {

var b = process.binding('signal_watcher');

var w = new b.SignalWatcher(startup.lazyConstants()[type]);

w.callback = function() { process.emit(type); };

signalWatchers[type] = w;

w.start();

} else if (this.listeners(type).length === 1) {

signalWatchers[event].start();

}

return ret;

};

process.removeListener = function(type, listener) {

var ret = removeListener.apply(this, arguments);

if (isSignal(type)) {

assert(signalWatchers.hasOwnProperty(type));

if (this.listeners(type).length === 0) {

signalWatchers[type].stop();

}

return ret;

};

startup._removedProcessMethods = {

'assert': 'process.assert() use require("assert").ok() instead',

'debug': 'process.debug() use console.error() instead',

'error': 'process.error() use console.error() instead',

'watchFile': 'process.watchFile() has moved to fs.watchFile()',

'unwatchFile': 'process.unwatchFile() has moved to fs.unwatchFile()',

'mixin': 'process.mixin() has been removed.',

'createChildProcess': 'childProcess API has changed. See doc/api.txt.',

'inherits': 'process.inherits() has moved to sys.inherits.',

'_byteLength': 'process._byteLength() has moved to Buffer.byteLength',

};

startup.removedMethods = function() {

for (var method in startup._removedProcessMethods) {

var reason = startup._removedProcessMethods[method];

process[method] = startup._removedMethod(reason);

}

};

startup._removedMethod = function(reason) {

return function() {

throw new Error(reason);

};

startup.resolveArgv0 = function() {

var cwd = process.cwd();

var isWindows = process.platform === 'win32';

// Make process.argv[0] into a full path, but only touch argv[0] if it's

// not a system $PATH lookup.

// TODO: Make this work on Windows as well. Note that "node" might

// execute cwd\node.exe, or some %PATH%\node.exe on Windows,

// and that every directory has its own cwd, so d:node.exe is valid.

var argv0 = process.argv[0];

if (!isWindows && argv0.indexOf('/') !== -1 && argv0.charAt(0) !== '/') {

var path = NativeModule.require('path');

process.argv[0] = path.join(cwd, process.argv[0]);

}

};

startup.runThirdPartyMain = function() {

// To allow people to extend Node in different ways, this hook allows

// one to drop a file lib/_third_party_main.js into the build directory

// which will be executed instead of Node's normal loading.

if (!NativeModule.exists('_third_party_main')) {

return;

}

process.nextTick(function() {

NativeModule.require('_third_party_main');

});

return true;

};

startup.runDebugger = function() {

if (!(process.argv[1] == 'debug')) {

return;

}

// Start the debugger agent

var d = NativeModule.require('_debugger');

d.start();

return true;

};

startup.runScript = function() {

if (!process.argv[1]) {

return;

}

// make process.argv[1] into a full path

if (!(/^http:\/\//).exec(process.argv[1])) {

var path = NativeModule.require('path');

process.argv[1] = path.resolve(process.argv[1]);

}

var Module = NativeModule.require('module');

// REMOVEME: nextTick should not be necessary. This hack to get

// test/simple/test-exception-handler2.js working.

process.nextTick(Module.runMain);

return true;

};

startup.runEval = function() {

// -e, --eval

if (!process._eval) {

return;

}

var Module = NativeModule.require('module');

var rv = new Module()._compile('return eval(process._eval)', 'eval');

console.log(rv);

return true;

};

startup.runRepl = function() {

var Module = NativeModule.require('module');

// REPL

Module.requireRepl().start();

};

// Below you find a minimal module system, which is used to load the node

// core modules found in lib/*.js. All core modules are compiled into the

// node binary, so they can be loaded faster.

var Script = process.binding('evals').Script;

var runInThisContext = Script.runInThisContext;

function NativeModule(id) {

this.filename = id + '.js';

this.id = id;

this.exports = {};

this.loaded = false;

}

NativeModule._source = process.binding('natives');

NativeModule._cache = {};

NativeModule.require = function(id) {

if (id == 'native_module') {

return NativeModule;

}

var cached = NativeModule.getCached(id);

if (cached) {

return cached.exports;

}

if (!NativeModule.exists(id)) {

throw new Error('No such native module ' + id);

}

var nativeModule = new NativeModule(id);

nativeModule.compile();

nativeModule.cache();

return nativeModule.exports;

};

NativeModule.getCached = function(id) {

return NativeModule._cache[id];

}

NativeModule.exists = function(id) {

return (id in NativeModule._source);

}

NativeModule.getSource = function(id) {

return NativeModule._source[id];

}

NativeModule.wrap = function(script) {

return NativeModule.wrapper[0] + script + NativeModule.wrapper[1];

};

NativeModule.wrapper = [

'(function (exports, require, module, __filename, __dirname) { ',

'\n});'

];

NativeModule.prototype.compile = function() {

var source = NativeModule.getSource(this.id);

source = NativeModule.wrap(source);

var fn = runInThisContext(source, this.filename, true);

fn(this.exports, NativeModule.require, this, this.filename);

this.loaded = true;

};

NativeModule.prototype.cache = function() {

NativeModule._cache[this.id] = this;

};

startup();

});

node/src/node.js at master · Nase/node · GitHub

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