--- /dev/null
+var fs = require('fs')
+var polyfills = require('./polyfills.js')
+var legacy = require('./legacy-streams.js')
+var queue = []
+
+var util = require('util')
+
+function noop () {}
+
+var debug = noop
+if (util.debuglog)
+ debug = util.debuglog('gfs4')
+else if (/\bgfs4\b/i.test(process.env.NODE_DEBUG || ''))
+ debug = function() {
+ var m = util.format.apply(util, arguments)
+ m = 'GFS4: ' + m.split(/\n/).join('\nGFS4: ')
+ console.error(m)
+ }
+
+if (/\bgfs4\b/i.test(process.env.NODE_DEBUG || '')) {
+ process.on('exit', function() {
+ debug(queue)
+ require('assert').equal(queue.length, 0)
+ })
+}
+
+module.exports = patch(require('./fs.js'))
+if (process.env.TEST_GRACEFUL_FS_GLOBAL_PATCH) {
+ module.exports = patch(fs)
+}
+
+// Always patch fs.close/closeSync, because we want to
+// retry() whenever a close happens *anywhere* in the program.
+// This is essential when multiple graceful-fs instances are
+// in play at the same time.
+module.exports.close =
+fs.close = (function (fs$close) { return function (fd, cb) {
+ return fs$close.call(fs, fd, function (err) {
+ if (!err)
+ retry()
+
+ if (typeof cb === 'function')
+ cb.apply(this, arguments)
+ })
+}})(fs.close)
+
+module.exports.closeSync =
+fs.closeSync = (function (fs$closeSync) { return function (fd) {
+ // Note that graceful-fs also retries when fs.closeSync() fails.
+ // Looks like a bug to me, although it's probably a harmless one.
+ var rval = fs$closeSync.apply(fs, arguments)
+ retry()
+ return rval
+}})(fs.closeSync)
+
+function patch (fs) {
+ // Everything that references the open() function needs to be in here
+ polyfills(fs)
+ fs.gracefulify = patch
+ fs.FileReadStream = ReadStream; // Legacy name.
+ fs.FileWriteStream = WriteStream; // Legacy name.
+ fs.createReadStream = createReadStream
+ fs.createWriteStream = createWriteStream
+ var fs$readFile = fs.readFile
+ fs.readFile = readFile
+ function readFile (path, options, cb) {
+ if (typeof options === 'function')
+ cb = options, options = null
+
+ return go$readFile(path, options, cb)
+
+ function go$readFile (path, options, cb) {
+ return fs$readFile(path, options, function (err) {
+ if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
+ enqueue([go$readFile, [path, options, cb]])
+ else {
+ if (typeof cb === 'function')
+ cb.apply(this, arguments)
+ retry()
+ }
+ })
+ }
+ }
+
+ var fs$writeFile = fs.writeFile
+ fs.writeFile = writeFile
+ function writeFile (path, data, options, cb) {
+ if (typeof options === 'function')
+ cb = options, options = null
+
+ return go$writeFile(path, data, options, cb)
+
+ function go$writeFile (path, data, options, cb) {
+ return fs$writeFile(path, data, options, function (err) {
+ if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
+ enqueue([go$writeFile, [path, data, options, cb]])
+ else {
+ if (typeof cb === 'function')
+ cb.apply(this, arguments)
+ retry()
+ }
+ })
+ }
+ }
+
+ var fs$appendFile = fs.appendFile
+ if (fs$appendFile)
+ fs.appendFile = appendFile
+ function appendFile (path, data, options, cb) {
+ if (typeof options === 'function')
+ cb = options, options = null
+
+ return go$appendFile(path, data, options, cb)
+
+ function go$appendFile (path, data, options, cb) {
+ return fs$appendFile(path, data, options, function (err) {
+ if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
+ enqueue([go$appendFile, [path, data, options, cb]])
+ else {
+ if (typeof cb === 'function')
+ cb.apply(this, arguments)
+ retry()
+ }
+ })
+ }
+ }
+
+ var fs$readdir = fs.readdir
+ fs.readdir = readdir
+ function readdir (path, options, cb) {
+ var args = [path]
+ if (typeof options !== 'function') {
+ args.push(options)
+ } else {
+ cb = options
+ }
+ args.push(go$readdir$cb)
+
+ return go$readdir(args)
+
+ function go$readdir$cb (err, files) {
+ if (files && files.sort)
+ files.sort()
+
+ if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
+ enqueue([go$readdir, [args]])
+ else {
+ if (typeof cb === 'function')
+ cb.apply(this, arguments)
+ retry()
+ }
+ }
+ }
+
+ function go$readdir (args) {
+ return fs$readdir.apply(fs, args)
+ }
+
+ if (process.version.substr(0, 4) === 'v0.8') {
+ var legStreams = legacy(fs)
+ ReadStream = legStreams.ReadStream
+ WriteStream = legStreams.WriteStream
+ }
+
+ var fs$ReadStream = fs.ReadStream
+ ReadStream.prototype = Object.create(fs$ReadStream.prototype)
+ ReadStream.prototype.open = ReadStream$open
+
+ var fs$WriteStream = fs.WriteStream
+ WriteStream.prototype = Object.create(fs$WriteStream.prototype)
+ WriteStream.prototype.open = WriteStream$open
+
+ fs.ReadStream = ReadStream
+ fs.WriteStream = WriteStream
+
+ function ReadStream (path, options) {
+ if (this instanceof ReadStream)
+ return fs$ReadStream.apply(this, arguments), this
+ else
+ return ReadStream.apply(Object.create(ReadStream.prototype), arguments)
+ }
+
+ function ReadStream$open () {
+ var that = this
+ open(that.path, that.flags, that.mode, function (err, fd) {
+ if (err) {
+ if (that.autoClose)
+ that.destroy()
+
+ that.emit('error', err)
+ } else {
+ that.fd = fd
+ that.emit('open', fd)
+ that.read()
+ }
+ })
+ }
+
+ function WriteStream (path, options) {
+ if (this instanceof WriteStream)
+ return fs$WriteStream.apply(this, arguments), this
+ else
+ return WriteStream.apply(Object.create(WriteStream.prototype), arguments)
+ }
+
+ function WriteStream$open () {
+ var that = this
+ open(that.path, that.flags, that.mode, function (err, fd) {
+ if (err) {
+ that.destroy()
+ that.emit('error', err)
+ } else {
+ that.fd = fd
+ that.emit('open', fd)
+ }
+ })
+ }
+
+ function createReadStream (path, options) {
+ return new ReadStream(path, options)
+ }
+
+ function createWriteStream (path, options) {
+ return new WriteStream(path, options)
+ }
+
+ var fs$open = fs.open
+ fs.open = open
+ function open (path, flags, mode, cb) {
+ if (typeof mode === 'function')
+ cb = mode, mode = null
+
+ return go$open(path, flags, mode, cb)
+
+ function go$open (path, flags, mode, cb) {
+ return fs$open(path, flags, mode, function (err, fd) {
+ if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
+ enqueue([go$open, [path, flags, mode, cb]])
+ else {
+ if (typeof cb === 'function')
+ cb.apply(this, arguments)
+ retry()
+ }
+ })
+ }
+ }
+
+ return fs
+}
+
+function enqueue (elem) {
+ debug('ENQUEUE', elem[0].name, elem[1])
+ queue.push(elem)
+}
+
+function retry () {
+ var elem = queue.shift()
+ if (elem) {
+ debug('RETRY', elem[0].name, elem[1])
+ elem[0].apply(null, elem[1])
+ }
+}
projects / yaffs-website / blobdiff