702 lines
19 KiB
JavaScript
702 lines
19 KiB
JavaScript
(function () {
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const asar = process.binding('atom_common_asar')
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const {Buffer} = require('buffer')
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const childProcess = require('child_process')
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const path = require('path')
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const util = require('util')
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const hasProp = {}.hasOwnProperty
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// Cache asar archive objects.
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const cachedArchives = {}
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const envNoAsar = process.env.ELECTRON_NO_ASAR && process.type !== 'browser' && process.type !== 'renderer'
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const isAsarDisabled = function () {
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return process.noAsar || envNoAsar
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}
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const getOrCreateArchive = function (p) {
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let archive = cachedArchives[p]
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if (archive != null) {
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return archive
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}
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archive = asar.createArchive(p)
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if (!archive) {
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return false
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}
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cachedArchives[p] = archive
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return archive
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}
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// Clean cache on quit.
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process.on('exit', function () {
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for (let p in cachedArchives) {
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if (!hasProp.call(cachedArchives, p)) continue
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cachedArchives[p].destroy()
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}
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})
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// Separate asar package's path from full path.
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const splitPath = function (p) {
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// shortcut to disable asar.
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if (isAsarDisabled()) {
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return [false]
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}
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if (Buffer.isBuffer(p)) {
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p = p.toString()
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}
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if (typeof p !== 'string') {
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return [false]
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}
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if (p.substr(-5) === '.asar') {
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return [true, p, '']
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}
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p = path.normalize(p)
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const index = p.lastIndexOf('.asar' + path.sep)
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if (index === -1) {
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return [false]
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}
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return [true, p.substr(0, index + 5), p.substr(index + 6)]
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}
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// Convert asar archive's Stats object to fs's Stats object.
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let nextInode = 0
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const uid = process.getuid != null ? process.getuid() : 0
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const gid = process.getgid != null ? process.getgid() : 0
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const fakeTime = new Date()
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const asarStatsToFsStats = function (stats) {
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return {
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dev: 1,
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ino: ++nextInode,
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mode: 33188,
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nlink: 1,
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uid: uid,
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gid: gid,
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rdev: 0,
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atime: stats.atime || fakeTime,
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birthtime: stats.birthtime || fakeTime,
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mtime: stats.mtime || fakeTime,
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ctime: stats.ctime || fakeTime,
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size: stats.size,
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isFile: function () {
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return stats.isFile
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},
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isDirectory: function () {
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return stats.isDirectory
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},
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isSymbolicLink: function () {
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return stats.isLink
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},
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isBlockDevice: function () {
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return false
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},
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isCharacterDevice: function () {
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return false
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},
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isFIFO: function () {
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return false
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},
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isSocket: function () {
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return false
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}
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}
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}
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// Create a ENOENT error.
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const notFoundError = function (asarPath, filePath, callback) {
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const error = new Error(`ENOENT, ${filePath} not found in ${asarPath}`)
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error.code = 'ENOENT'
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error.errno = -2
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if (typeof callback !== 'function') {
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throw error
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}
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process.nextTick(function () {
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callback(error)
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})
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}
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// Create a ENOTDIR error.
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const notDirError = function (callback) {
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const error = new Error('ENOTDIR, not a directory')
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error.code = 'ENOTDIR'
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error.errno = -20
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if (typeof callback !== 'function') {
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throw error
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}
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process.nextTick(function () {
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callback(error)
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})
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}
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// Create a EACCES error.
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const accessError = function (asarPath, filePath, callback) {
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const error = new Error(`EACCES: permission denied, access '${filePath}'`)
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error.code = 'EACCES'
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error.errno = -13
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if (typeof callback !== 'function') {
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throw error
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}
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process.nextTick(function () {
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callback(error)
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})
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}
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// Create invalid archive error.
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const invalidArchiveError = function (asarPath, callback) {
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const error = new Error(`Invalid package ${asarPath}`)
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if (typeof callback !== 'function') {
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throw error
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}
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process.nextTick(function () {
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callback(error)
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})
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}
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// Override APIs that rely on passing file path instead of content to C++.
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const overrideAPISync = function (module, name, arg) {
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if (arg == null) {
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arg = 0
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}
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const old = module[name]
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module[name] = function () {
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const p = arguments[arg]
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return old.apply(this, arguments)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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invalidArchiveError(asarPath)
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}
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const newPath = archive.copyFileOut(filePath)
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if (!newPath) {
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notFoundError(asarPath, filePath)
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}
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arguments[arg] = newPath
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return old.apply(this, arguments)
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}
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}
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const overrideAPI = function (module, name, arg) {
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if (arg == null) {
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arg = 0
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}
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const old = module[name]
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module[name] = function () {
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const p = arguments[arg]
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return old.apply(this, arguments)
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}
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const callback = arguments[arguments.length - 1]
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if (typeof callback !== 'function') {
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return overrideAPISync(module, name, arg)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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return invalidArchiveError(asarPath, callback)
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}
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const newPath = archive.copyFileOut(filePath)
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if (!newPath) {
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return notFoundError(asarPath, filePath, callback)
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}
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arguments[arg] = newPath
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return old.apply(this, arguments)
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}
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}
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// Override fs APIs.
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exports.wrapFsWithAsar = function (fs) {
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const logFDs = {}
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const logASARAccess = function (asarPath, filePath, offset) {
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if (!process.env.ELECTRON_LOG_ASAR_READS) {
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return
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}
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if (!logFDs[asarPath]) {
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const path = require('path')
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const logFilename = path.basename(asarPath, '.asar') + '-access-log.txt'
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const logPath = path.join(require('os').tmpdir(), logFilename)
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logFDs[asarPath] = fs.openSync(logPath, 'a')
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console.log('Logging ' + asarPath + ' access to ' + logPath)
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}
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fs.writeSync(logFDs[asarPath], offset + ': ' + filePath + '\n')
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}
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const {lstatSync} = fs
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fs.lstatSync = function (p) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return lstatSync(p)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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invalidArchiveError(asarPath)
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}
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const stats = archive.stat(filePath)
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if (!stats) {
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notFoundError(asarPath, filePath)
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}
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return asarStatsToFsStats(stats)
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}
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const {lstat} = fs
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fs.lstat = function (p, callback) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return lstat(p, callback)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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return invalidArchiveError(asarPath, callback)
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}
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const stats = getOrCreateArchive(asarPath).stat(filePath)
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if (!stats) {
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return notFoundError(asarPath, filePath, callback)
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}
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process.nextTick(function () {
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callback(null, asarStatsToFsStats(stats))
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})
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}
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const {statSync} = fs
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fs.statSync = function (p) {
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const [isAsar] = splitPath(p)
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if (!isAsar) {
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return statSync(p)
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}
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// Do not distinguish links for now.
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return fs.lstatSync(p)
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}
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const {stat} = fs
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fs.stat = function (p, callback) {
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const [isAsar] = splitPath(p)
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if (!isAsar) {
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return stat(p, callback)
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}
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// Do not distinguish links for now.
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process.nextTick(function () {
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fs.lstat(p, callback)
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})
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}
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const {statSyncNoException} = fs
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fs.statSyncNoException = function (p) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return statSyncNoException(p)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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return false
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}
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const stats = archive.stat(filePath)
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if (!stats) {
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return false
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}
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return asarStatsToFsStats(stats)
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}
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const {realpathSync} = fs
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fs.realpathSync = function (p) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return realpathSync.apply(this, arguments)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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invalidArchiveError(asarPath)
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}
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const real = archive.realpath(filePath)
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if (real === false) {
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notFoundError(asarPath, filePath)
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}
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return path.join(realpathSync(asarPath), real)
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}
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const {realpath} = fs
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fs.realpath = function (p, cache, callback) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return realpath.apply(this, arguments)
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}
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if (typeof cache === 'function') {
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callback = cache
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cache = void 0
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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return invalidArchiveError(asarPath, callback)
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}
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const real = archive.realpath(filePath)
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if (real === false) {
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return notFoundError(asarPath, filePath, callback)
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}
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return realpath(asarPath, function (err, p) {
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if (err) {
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return callback(err)
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}
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return callback(null, path.join(p, real))
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})
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}
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const {exists} = fs
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fs.exists = function (p, callback) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return exists(p, callback)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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return invalidArchiveError(asarPath, callback)
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}
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process.nextTick(function () {
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callback(archive.stat(filePath) !== false)
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})
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}
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const {existsSync} = fs
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fs.existsSync = function (p) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return existsSync(p)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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return false
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}
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return archive.stat(filePath) !== false
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}
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const {access} = fs
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fs.access = function (p, mode, callback) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return access.apply(this, arguments)
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}
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if (typeof mode === 'function') {
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callback = mode
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mode = fs.constants.F_OK
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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return invalidArchiveError(asarPath, callback)
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}
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const info = archive.getFileInfo(filePath)
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if (!info) {
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return notFoundError(asarPath, filePath, callback)
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}
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if (info.unpacked) {
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const realPath = archive.copyFileOut(filePath)
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return fs.access(realPath, mode, callback)
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}
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const stats = getOrCreateArchive(asarPath).stat(filePath)
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if (!stats) {
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return notFoundError(asarPath, filePath, callback)
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}
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if (mode & fs.constants.W_OK) {
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return accessError(asarPath, filePath, callback)
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}
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process.nextTick(function () {
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callback()
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})
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}
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const {accessSync} = fs
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fs.accessSync = function (p, mode) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return accessSync.apply(this, arguments)
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}
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if (mode == null) {
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mode = fs.constants.F_OK
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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invalidArchiveError(asarPath)
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}
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const info = archive.getFileInfo(filePath)
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if (!info) {
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notFoundError(asarPath, filePath)
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}
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if (info.unpacked) {
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const realPath = archive.copyFileOut(filePath)
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return fs.accessSync(realPath, mode)
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}
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const stats = getOrCreateArchive(asarPath).stat(filePath)
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if (!stats) {
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notFoundError(asarPath, filePath)
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}
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if (mode & fs.constants.W_OK) {
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accessError(asarPath, filePath)
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}
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}
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const {readFile} = fs
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fs.readFile = function (p, options, callback) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return readFile.apply(this, arguments)
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}
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if (typeof options === 'function') {
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callback = options
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options = {
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encoding: null
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}
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} else if (typeof options === 'string') {
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options = {
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encoding: options
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}
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} else if (options === null || options === undefined) {
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options = {
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encoding: null
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}
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} else if (typeof options !== 'object') {
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throw new TypeError('Bad arguments')
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}
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const {encoding} = options
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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return invalidArchiveError(asarPath, callback)
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}
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const info = archive.getFileInfo(filePath)
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if (!info) {
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return notFoundError(asarPath, filePath, callback)
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}
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if (info.size === 0) {
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return process.nextTick(function () {
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callback(null, encoding ? '' : new Buffer(0))
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})
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}
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if (info.unpacked) {
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const realPath = archive.copyFileOut(filePath)
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return fs.readFile(realPath, options, callback)
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}
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const buffer = new Buffer(info.size)
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const fd = archive.getFd()
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if (!(fd >= 0)) {
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return notFoundError(asarPath, filePath, callback)
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}
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logASARAccess(asarPath, filePath, info.offset)
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fs.read(fd, buffer, 0, info.size, info.offset, function (error) {
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callback(error, encoding ? buffer.toString(encoding) : buffer)
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})
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}
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const {readFileSync} = fs
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fs.readFileSync = function (p, options) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return readFileSync.apply(this, arguments)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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invalidArchiveError(asarPath)
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}
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const info = archive.getFileInfo(filePath)
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if (!info) {
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notFoundError(asarPath, filePath)
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}
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if (info.size === 0) {
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if (options) {
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return ''
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} else {
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return new Buffer(0)
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}
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}
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if (info.unpacked) {
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const realPath = archive.copyFileOut(filePath)
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return fs.readFileSync(realPath, options)
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}
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if (!options) {
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options = {
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encoding: null
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}
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} else if (typeof options === 'string') {
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options = {
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encoding: options
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}
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} else if (typeof options !== 'object') {
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throw new TypeError('Bad arguments')
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}
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const {encoding} = options
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const buffer = new Buffer(info.size)
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const fd = archive.getFd()
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if (!(fd >= 0)) {
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notFoundError(asarPath, filePath)
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}
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logASARAccess(asarPath, filePath, info.offset)
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fs.readSync(fd, buffer, 0, info.size, info.offset)
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if (encoding) {
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return buffer.toString(encoding)
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} else {
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return buffer
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}
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}
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const {readdir} = fs
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fs.readdir = function (p, callback) {
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const [isAsar, asarPath, filePath] = splitPath(p)
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if (!isAsar) {
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return readdir.apply(this, arguments)
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}
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const archive = getOrCreateArchive(asarPath)
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if (!archive) {
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return invalidArchiveError(asarPath, callback)
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}
|
|
const files = archive.readdir(filePath)
|
|
if (!files) {
|
|
return notFoundError(asarPath, filePath, callback)
|
|
}
|
|
process.nextTick(function () {
|
|
callback(null, files)
|
|
})
|
|
}
|
|
|
|
const {readdirSync} = fs
|
|
fs.readdirSync = function (p) {
|
|
const [isAsar, asarPath, filePath] = splitPath(p)
|
|
if (!isAsar) {
|
|
return readdirSync.apply(this, arguments)
|
|
}
|
|
const archive = getOrCreateArchive(asarPath)
|
|
if (!archive) {
|
|
invalidArchiveError(asarPath)
|
|
}
|
|
const files = archive.readdir(filePath)
|
|
if (!files) {
|
|
notFoundError(asarPath, filePath)
|
|
}
|
|
return files
|
|
}
|
|
|
|
const {internalModuleReadFile} = process.binding('fs')
|
|
process.binding('fs').internalModuleReadFile = function (p) {
|
|
const [isAsar, asarPath, filePath] = splitPath(p)
|
|
if (!isAsar) {
|
|
return internalModuleReadFile(p)
|
|
}
|
|
const archive = getOrCreateArchive(asarPath)
|
|
if (!archive) {
|
|
return
|
|
}
|
|
const info = archive.getFileInfo(filePath)
|
|
if (!info) {
|
|
return
|
|
}
|
|
if (info.size === 0) {
|
|
return ''
|
|
}
|
|
if (info.unpacked) {
|
|
const realPath = archive.copyFileOut(filePath)
|
|
return fs.readFileSync(realPath, {
|
|
encoding: 'utf8'
|
|
})
|
|
}
|
|
const buffer = new Buffer(info.size)
|
|
const fd = archive.getFd()
|
|
if (!(fd >= 0)) {
|
|
return
|
|
}
|
|
logASARAccess(asarPath, filePath, info.offset)
|
|
fs.readSync(fd, buffer, 0, info.size, info.offset)
|
|
return buffer.toString('utf8')
|
|
}
|
|
|
|
const {internalModuleStat} = process.binding('fs')
|
|
process.binding('fs').internalModuleStat = function (p) {
|
|
const [isAsar, asarPath, filePath] = splitPath(p)
|
|
if (!isAsar) {
|
|
return internalModuleStat(p)
|
|
}
|
|
const archive = getOrCreateArchive(asarPath)
|
|
|
|
// -ENOENT
|
|
if (!archive) {
|
|
return -34
|
|
}
|
|
const stats = archive.stat(filePath)
|
|
|
|
// -ENOENT
|
|
if (!stats) {
|
|
return -34
|
|
}
|
|
if (stats.isDirectory) {
|
|
return 1
|
|
} else {
|
|
return 0
|
|
}
|
|
}
|
|
|
|
// Calling mkdir for directory inside asar archive should throw ENOTDIR
|
|
// error, but on Windows it throws ENOENT.
|
|
// This is to work around the recursive looping bug of mkdirp since it is
|
|
// widely used.
|
|
if (process.platform === 'win32') {
|
|
const {mkdir} = fs
|
|
fs.mkdir = function (p, mode, callback) {
|
|
if (typeof mode === 'function') {
|
|
callback = mode
|
|
}
|
|
const [isAsar, , filePath] = splitPath(p)
|
|
if (isAsar && filePath.length) {
|
|
return notDirError(callback)
|
|
}
|
|
mkdir(p, mode, callback)
|
|
}
|
|
|
|
const {mkdirSync} = fs
|
|
fs.mkdirSync = function (p, mode) {
|
|
const [isAsar, , filePath] = splitPath(p)
|
|
if (isAsar && filePath.length) {
|
|
notDirError()
|
|
}
|
|
return mkdirSync(p, mode)
|
|
}
|
|
}
|
|
|
|
// Executing a command string containing a path to an asar
|
|
// archive confuses `childProcess.execFile`, which is internally
|
|
// called by `childProcess.{exec,execSync}`, causing
|
|
// Electron to consider the full command as a single path
|
|
// to an archive.
|
|
['exec', 'execSync'].forEach(function (functionName) {
|
|
const old = childProcess[functionName]
|
|
childProcess[functionName] = function () {
|
|
const processNoAsarOriginalValue = process.noAsar
|
|
process.noAsar = true
|
|
try {
|
|
return old.apply(this, arguments)
|
|
} finally {
|
|
process.noAsar = processNoAsarOriginalValue
|
|
}
|
|
}
|
|
})
|
|
|
|
overrideAPI(fs, 'open')
|
|
overrideAPI(childProcess, 'execFile')
|
|
overrideAPISync(process, 'dlopen', 1)
|
|
overrideAPISync(require('module')._extensions, '.node', 1)
|
|
overrideAPISync(fs, 'openSync')
|
|
overrideAPISync(childProcess, 'execFileSync')
|
|
}
|
|
})()
|