diff options
Diffstat (limited to 'node_modules/graceful-fs')
| -rw-r--r-- | node_modules/graceful-fs/LICENSE | 15 | ||||
| -rw-r--r-- | node_modules/graceful-fs/README.md | 143 | ||||
| -rw-r--r-- | node_modules/graceful-fs/clone.js | 23 | ||||
| -rw-r--r-- | node_modules/graceful-fs/graceful-fs.js | 429 | ||||
| -rw-r--r-- | node_modules/graceful-fs/legacy-streams.js | 118 | ||||
| -rw-r--r-- | node_modules/graceful-fs/package.json | 50 | ||||
| -rw-r--r-- | node_modules/graceful-fs/polyfills.js | 348 |
7 files changed, 1126 insertions, 0 deletions
diff --git a/node_modules/graceful-fs/LICENSE b/node_modules/graceful-fs/LICENSE new file mode 100644 index 0000000..9d2c803 --- /dev/null +++ b/node_modules/graceful-fs/LICENSE @@ -0,0 +1,15 @@ +The ISC License + +Copyright (c) Isaac Z. Schlueter, Ben Noordhuis, and Contributors + +Permission to use, copy, modify, and/or distribute this software for any +purpose with or without fee is hereby granted, provided that the above +copyright notice and this permission notice appear in all copies. + +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR +IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. diff --git a/node_modules/graceful-fs/README.md b/node_modules/graceful-fs/README.md new file mode 100644 index 0000000..82d6e4d --- /dev/null +++ b/node_modules/graceful-fs/README.md @@ -0,0 +1,143 @@ +# graceful-fs + +graceful-fs functions as a drop-in replacement for the fs module, +making various improvements. + +The improvements are meant to normalize behavior across different +platforms and environments, and to make filesystem access more +resilient to errors. + +## Improvements over [fs module](https://nodejs.org/api/fs.html) + +* Queues up `open` and `readdir` calls, and retries them once + something closes if there is an EMFILE error from too many file + descriptors. +* fixes `lchmod` for Node versions prior to 0.6.2. +* implements `fs.lutimes` if possible. Otherwise it becomes a noop. +* ignores `EINVAL` and `EPERM` errors in `chown`, `fchown` or + `lchown` if the user isn't root. +* makes `lchmod` and `lchown` become noops, if not available. +* retries reading a file if `read` results in EAGAIN error. + +On Windows, it retries renaming a file for up to one second if `EACCESS` +or `EPERM` error occurs, likely because antivirus software has locked +the directory. + +## USAGE + +```javascript +// use just like fs +var fs = require('graceful-fs') + +// now go and do stuff with it... +fs.readFile('some-file-or-whatever', (err, data) => { + // Do stuff here. +}) +``` + +## Sync methods + +This module cannot intercept or handle `EMFILE` or `ENFILE` errors from sync +methods. If you use sync methods which open file descriptors then you are +responsible for dealing with any errors. + +This is a known limitation, not a bug. + +## Global Patching + +If you want to patch the global fs module (or any other fs-like +module) you can do this: + +```javascript +// Make sure to read the caveat below. +var realFs = require('fs') +var gracefulFs = require('graceful-fs') +gracefulFs.gracefulify(realFs) +``` + +This should only ever be done at the top-level application layer, in +order to delay on EMFILE errors from any fs-using dependencies. You +should **not** do this in a library, because it can cause unexpected +delays in other parts of the program. + +## Changes + +This module is fairly stable at this point, and used by a lot of +things. That being said, because it implements a subtle behavior +change in a core part of the node API, even modest changes can be +extremely breaking, and the versioning is thus biased towards +bumping the major when in doubt. + +The main change between major versions has been switching between +providing a fully-patched `fs` module vs monkey-patching the node core +builtin, and the approach by which a non-monkey-patched `fs` was +created. + +The goal is to trade `EMFILE` errors for slower fs operations. So, if +you try to open a zillion files, rather than crashing, `open` +operations will be queued up and wait for something else to `close`. + +There are advantages to each approach. Monkey-patching the fs means +that no `EMFILE` errors can possibly occur anywhere in your +application, because everything is using the same core `fs` module, +which is patched. However, it can also obviously cause undesirable +side-effects, especially if the module is loaded multiple times. + +Implementing a separate-but-identical patched `fs` module is more +surgical (and doesn't run the risk of patching multiple times), but +also imposes the challenge of keeping in sync with the core module. + +The current approach loads the `fs` module, and then creates a +lookalike object that has all the same methods, except a few that are +patched. It is safe to use in all versions of Node from 0.8 through +7.0. + +### v4 + +* Do not monkey-patch the fs module. This module may now be used as a + drop-in dep, and users can opt into monkey-patching the fs builtin + if their app requires it. + +### v3 + +* Monkey-patch fs, because the eval approach no longer works on recent + node. +* fixed possible type-error throw if rename fails on windows +* verify that we *never* get EMFILE errors +* Ignore ENOSYS from chmod/chown +* clarify that graceful-fs must be used as a drop-in + +### v2.1.0 + +* Use eval rather than monkey-patching fs. +* readdir: Always sort the results +* win32: requeue a file if error has an OK status + +### v2.0 + +* A return to monkey patching +* wrap process.cwd + +### v1.1 + +* wrap readFile +* Wrap fs.writeFile. +* readdir protection +* Don't clobber the fs builtin +* Handle fs.read EAGAIN errors by trying again +* Expose the curOpen counter +* No-op lchown/lchmod if not implemented +* fs.rename patch only for win32 +* Patch fs.rename to handle AV software on Windows +* Close #4 Chown should not fail on einval or eperm if non-root +* Fix isaacs/fstream#1 Only wrap fs one time +* Fix #3 Start at 1024 max files, then back off on EMFILE +* lutimes that doens't blow up on Linux +* A full on-rewrite using a queue instead of just swallowing the EMFILE error +* Wrap Read/Write streams as well + +### 1.0 + +* Update engines for node 0.6 +* Be lstat-graceful on Windows +* first diff --git a/node_modules/graceful-fs/clone.js b/node_modules/graceful-fs/clone.js new file mode 100644 index 0000000..dff3cc8 --- /dev/null +++ b/node_modules/graceful-fs/clone.js @@ -0,0 +1,23 @@ +'use strict' + +module.exports = clone + +var getPrototypeOf = Object.getPrototypeOf || function (obj) { + return obj.__proto__ +} + +function clone (obj) { + if (obj === null || typeof obj !== 'object') + return obj + + if (obj instanceof Object) + var copy = { __proto__: getPrototypeOf(obj) } + else + var copy = Object.create(null) + + Object.getOwnPropertyNames(obj).forEach(function (key) { + Object.defineProperty(copy, key, Object.getOwnPropertyDescriptor(obj, key)) + }) + + return copy +} diff --git a/node_modules/graceful-fs/graceful-fs.js b/node_modules/graceful-fs/graceful-fs.js new file mode 100644 index 0000000..947cd94 --- /dev/null +++ b/node_modules/graceful-fs/graceful-fs.js @@ -0,0 +1,429 @@ +var fs = require('fs') +var polyfills = require('./polyfills.js') +var legacy = require('./legacy-streams.js') +var clone = require('./clone.js') + +var util = require('util') + +/* istanbul ignore next - node 0.x polyfill */ +var gracefulQueue +var previousSymbol + +/* istanbul ignore else - node 0.x polyfill */ +if (typeof Symbol === 'function' && typeof Symbol.for === 'function') { + gracefulQueue = Symbol.for('graceful-fs.queue') + // This is used in testing by future versions + previousSymbol = Symbol.for('graceful-fs.previous') +} else { + gracefulQueue = '___graceful-fs.queue' + previousSymbol = '___graceful-fs.previous' +} + +function noop () {} + +function publishQueue(context, queue) { + Object.defineProperty(context, gracefulQueue, { + get: function() { + return queue + } + }) +} + +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) + } + +// Once time initialization +if (!fs[gracefulQueue]) { + // This queue can be shared by multiple loaded instances + var queue = global[gracefulQueue] || [] + publishQueue(fs, queue) + + // Patch fs.close/closeSync to shared queue version, because we need + // 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. + fs.close = (function (fs$close) { + function close (fd, cb) { + return fs$close.call(fs, fd, function (err) { + // This function uses the graceful-fs shared queue + if (!err) { + resetQueue() + } + + if (typeof cb === 'function') + cb.apply(this, arguments) + }) + } + + Object.defineProperty(close, previousSymbol, { + value: fs$close + }) + return close + })(fs.close) + + fs.closeSync = (function (fs$closeSync) { + function closeSync (fd) { + // This function uses the graceful-fs shared queue + fs$closeSync.apply(fs, arguments) + resetQueue() + } + + Object.defineProperty(closeSync, previousSymbol, { + value: fs$closeSync + }) + return closeSync + })(fs.closeSync) + + if (/\bgfs4\b/i.test(process.env.NODE_DEBUG || '')) { + process.on('exit', function() { + debug(fs[gracefulQueue]) + require('assert').equal(fs[gracefulQueue].length, 0) + }) + } +} + +if (!global[gracefulQueue]) { + publishQueue(global, fs[gracefulQueue]); +} + +module.exports = patch(clone(fs)) +if (process.env.TEST_GRACEFUL_FS_GLOBAL_PATCH && !fs.__patched) { + module.exports = patch(fs) + fs.__patched = true; +} + +function patch (fs) { + // Everything that references the open() function needs to be in here + polyfills(fs) + fs.gracefulify = patch + + 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$readFile (path, options, cb, startTime) { + return fs$readFile(path, options, function (err) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$readFile, [path, options, cb], err, startTime || Date.now(), Date.now()]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + } + }) + } + } + + var fs$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, startTime) { + return fs$writeFile(path, data, options, function (err) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$writeFile, [path, data, options, cb], err, startTime || Date.now(), Date.now()]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + } + }) + } + } + + 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, startTime) { + return fs$appendFile(path, data, options, function (err) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$appendFile, [path, data, options, cb], err, startTime || Date.now(), Date.now()]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + } + }) + } + } + + var fs$copyFile = fs.copyFile + if (fs$copyFile) + fs.copyFile = copyFile + function copyFile (src, dest, flags, cb) { + if (typeof flags === 'function') { + cb = flags + flags = 0 + } + return go$copyFile(src, dest, flags, cb) + + function go$copyFile (src, dest, flags, cb, startTime) { + return fs$copyFile(src, dest, flags, function (err) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$copyFile, [src, dest, flags, cb], err, startTime || Date.now(), Date.now()]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + } + }) + } + } + + var fs$readdir = fs.readdir + fs.readdir = readdir + function readdir (path, options, cb) { + if (typeof options === 'function') + cb = options, options = null + + return go$readdir(path, options, cb) + + function go$readdir (path, options, cb, startTime) { + return fs$readdir(path, options, function (err, files) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$readdir, [path, options, cb], err, startTime || Date.now(), Date.now()]) + else { + if (files && files.sort) + files.sort() + + if (typeof cb === 'function') + cb.call(this, err, files) + } + }) + } + } + + if (process.version.substr(0, 4) === 'v0.8') { + var legStreams = legacy(fs) + ReadStream = legStreams.ReadStream + WriteStream = legStreams.WriteStream + } + + var fs$ReadStream = fs.ReadStream + if (fs$ReadStream) { + ReadStream.prototype = Object.create(fs$ReadStream.prototype) + ReadStream.prototype.open = ReadStream$open + } + + var fs$WriteStream = fs.WriteStream + if (fs$WriteStream) { + WriteStream.prototype = Object.create(fs$WriteStream.prototype) + WriteStream.prototype.open = WriteStream$open + } + + Object.defineProperty(fs, 'ReadStream', { + get: function () { + return ReadStream + }, + set: function (val) { + ReadStream = val + }, + enumerable: true, + configurable: true + }) + Object.defineProperty(fs, 'WriteStream', { + get: function () { + return WriteStream + }, + set: function (val) { + WriteStream = val + }, + enumerable: true, + configurable: true + }) + + // legacy names + var FileReadStream = ReadStream + Object.defineProperty(fs, 'FileReadStream', { + get: function () { + return FileReadStream + }, + set: function (val) { + FileReadStream = val + }, + enumerable: true, + configurable: true + }) + var FileWriteStream = WriteStream + Object.defineProperty(fs, 'FileWriteStream', { + get: function () { + return FileWriteStream + }, + set: function (val) { + FileWriteStream = val + }, + enumerable: true, + configurable: true + }) + + function ReadStream (path, options) { + if (this instanceof ReadStream) + return fs$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$open () { + var that = this + open(that.path, that.flags, that.mode, function (err, fd) { + if (err) { + that.destroy() + that.emit('error', err) + } else { + that.fd = fd + that.emit('open', fd) + } + }) + } + + function createReadStream (path, options) { + return new fs.ReadStream(path, options) + } + + function createWriteStream (path, options) { + return new fs.WriteStream(path, options) + } + + var fs$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, startTime) { + return fs$open(path, flags, mode, function (err, fd) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$open, [path, flags, mode, cb], err, startTime || Date.now(), Date.now()]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + } + }) + } + } + + return fs +} + +function enqueue (elem) { + debug('ENQUEUE', elem[0].name, elem[1]) + fs[gracefulQueue].push(elem) + retry() +} + +// keep track of the timeout between retry() calls +var retryTimer + +// reset the startTime and lastTime to now +// this resets the start of the 60 second overall timeout as well as the +// delay between attempts so that we'll retry these jobs sooner +function resetQueue () { + var now = Date.now() + for (var i = 0; i < fs[gracefulQueue].length; ++i) { + // entries that are only a length of 2 are from an older version, don't + // bother modifying those since they'll be retried anyway. + if (fs[gracefulQueue][i].length > 2) { + fs[gracefulQueue][i][3] = now // startTime + fs[gracefulQueue][i][4] = now // lastTime + } + } + // call retry to make sure we're actively processing the queue + retry() +} + +function retry () { + // clear the timer and remove it to help prevent unintended concurrency + clearTimeout(retryTimer) + retryTimer = undefined + + if (fs[gracefulQueue].length === 0) + return + + var elem = fs[gracefulQueue].shift() + var fn = elem[0] + var args = elem[1] + // these items may be unset if they were added by an older graceful-fs + var err = elem[2] + var startTime = elem[3] + var lastTime = elem[4] + + // if we don't have a startTime we have no way of knowing if we've waited + // long enough, so go ahead and retry this item now + if (startTime === undefined) { + debug('RETRY', fn.name, args) + fn.apply(null, args) + } else if (Date.now() - startTime >= 60000) { + // it's been more than 60 seconds total, bail now + debug('TIMEOUT', fn.name, args) + var cb = args.pop() + if (typeof cb === 'function') + cb.call(null, err) + } else { + // the amount of time between the last attempt and right now + var sinceAttempt = Date.now() - lastTime + // the amount of time between when we first tried, and when we last tried + // rounded up to at least 1 + var sinceStart = Math.max(lastTime - startTime, 1) + // backoff. wait longer than the total time we've been retrying, but only + // up to a maximum of 100ms + var desiredDelay = Math.min(sinceStart * 1.2, 100) + // it's been long enough since the last retry, do it again + if (sinceAttempt >= desiredDelay) { + debug('RETRY', fn.name, args) + fn.apply(null, args.concat([startTime])) + } else { + // if we can't do this job yet, push it to the end of the queue + // and let the next iteration check again + fs[gracefulQueue].push(elem) + } + } + + // schedule our next run if one isn't already scheduled + if (retryTimer === undefined) { + retryTimer = setTimeout(retry, 0) + } +} diff --git a/node_modules/graceful-fs/legacy-streams.js b/node_modules/graceful-fs/legacy-streams.js new file mode 100644 index 0000000..d617b50 --- /dev/null +++ b/node_modules/graceful-fs/legacy-streams.js @@ -0,0 +1,118 @@ +var Stream = require('stream').Stream + +module.exports = legacy + +function legacy (fs) { + return { + ReadStream: ReadStream, + WriteStream: WriteStream + } + + function ReadStream (path, options) { + if (!(this instanceof ReadStream)) return new ReadStream(path, options); + + Stream.call(this); + + var self = this; + + this.path = path; + this.fd = null; + this.readable = true; + this.paused = false; + + this.flags = 'r'; + this.mode = 438; /*=0666*/ + this.bufferSize = 64 * 1024; + + options = options || {}; + + // Mixin options into this + var keys = Object.keys(options); + for (var index = 0, length = keys.length; index < length; index++) { + var key = keys[index]; + this[key] = options[key]; + } + + if (this.encoding) this.setEncoding(this.encoding); + + if (this.start !== undefined) { + if ('number' !== typeof this.start) { + throw TypeError('start must be a Number'); + } + if (this.end === undefined) { + this.end = Infinity; + } else if ('number' !== typeof this.end) { + throw TypeError('end must be a Number'); + } + + if (this.start > this.end) { + throw new Error('start must be <= end'); + } + + this.pos = this.start; + } + + if (this.fd !== null) { + process.nextTick(function() { + self._read(); + }); + return; + } + + fs.open(this.path, this.flags, this.mode, function (err, fd) { + if (err) { + self.emit('error', err); + self.readable = false; + return; + } + + self.fd = fd; + self.emit('open', fd); + self._read(); + }) + } + + function WriteStream (path, options) { + if (!(this instanceof WriteStream)) return new WriteStream(path, options); + + Stream.call(this); + + this.path = path; + this.fd = null; + this.writable = true; + + this.flags = 'w'; + this.encoding = 'binary'; + this.mode = 438; /*=0666*/ + this.bytesWritten = 0; + + options = options || {}; + + // Mixin options into this + var keys = Object.keys(options); + for (var index = 0, length = keys.length; index < length; index++) { + var key = keys[index]; + this[key] = options[key]; + } + + if (this.start !== undefined) { + if ('number' !== typeof this.start) { + throw TypeError('start must be a Number'); + } + if (this.start < 0) { + throw new Error('start must be >= zero'); + } + + this.pos = this.start; + } + + this.busy = false; + this._queue = []; + + if (this.fd === null) { + this._open = fs.open; + this._queue.push([this._open, this.path, this.flags, this.mode, undefined]); + this.flush(); + } + } +} diff --git a/node_modules/graceful-fs/package.json b/node_modules/graceful-fs/package.json new file mode 100644 index 0000000..e1cb584 --- /dev/null +++ b/node_modules/graceful-fs/package.json @@ -0,0 +1,50 @@ +{ + "name": "graceful-fs", + "description": "A drop-in replacement for fs, making various improvements.", + "version": "4.2.9", + "repository": { + "type": "git", + "url": "https://github.com/isaacs/node-graceful-fs" + }, + "main": "graceful-fs.js", + "directories": { + "test": "test" + }, + "scripts": { + "preversion": "npm test", + "postversion": "npm publish", + "postpublish": "git push origin --follow-tags", + "test": "nyc --silent node test.js | tap -c -", + "posttest": "nyc report" + }, + "keywords": [ + "fs", + "module", + "reading", + "retry", + "retries", + "queue", + "error", + "errors", + "handling", + "EMFILE", + "EAGAIN", + "EINVAL", + "EPERM", + "EACCESS" + ], + "license": "ISC", + "devDependencies": { + "import-fresh": "^2.0.0", + "mkdirp": "^0.5.0", + "rimraf": "^2.2.8", + "tap": "^12.7.0" + }, + "files": [ + "fs.js", + "graceful-fs.js", + "legacy-streams.js", + "polyfills.js", + "clone.js" + ] +} diff --git a/node_modules/graceful-fs/polyfills.js b/node_modules/graceful-fs/polyfills.js new file mode 100644 index 0000000..26804ef --- /dev/null +++ b/node_modules/graceful-fs/polyfills.js @@ -0,0 +1,348 @@ +var constants = require('constants') + +var origCwd = process.cwd +var cwd = null + +var platform = process.env.GRACEFUL_FS_PLATFORM || process.platform + +process.cwd = function() { + if (!cwd) + cwd = origCwd.call(process) + return cwd +} +try { + process.cwd() +} catch (er) {} + +// This check is needed until node.js 12 is required +if (typeof process.chdir === 'function') { + var chdir = process.chdir + process.chdir = function (d) { + cwd = null + chdir.call(process, d) + } + if (Object.setPrototypeOf) Object.setPrototypeOf(process.chdir, chdir) +} + +module.exports = patch + +function patch (fs) { + // (re-)implement some things that are known busted or missing. + + // lchmod, broken prior to 0.6.2 + // back-port the fix here. + if (constants.hasOwnProperty('O_SYMLINK') && + process.version.match(/^v0\.6\.[0-2]|^v0\.5\./)) { + patchLchmod(fs) + } + + // lutimes implementation, or no-op + if (!fs.lutimes) { + patchLutimes(fs) + } + + // https://github.com/isaacs/node-graceful-fs/issues/4 + // Chown should not fail on einval or eperm if non-root. + // It should not fail on enosys ever, as this just indicates + // that a fs doesn't support the intended operation. + + fs.chown = chownFix(fs.chown) + fs.fchown = chownFix(fs.fchown) + fs.lchown = chownFix(fs.lchown) + + fs.chmod = chmodFix(fs.chmod) + fs.fchmod = chmodFix(fs.fchmod) + fs.lchmod = chmodFix(fs.lchmod) + + fs.chownSync = chownFixSync(fs.chownSync) + fs.fchownSync = chownFixSync(fs.fchownSync) + fs.lchownSync = chownFixSync(fs.lchownSync) + + fs.chmodSync = chmodFixSync(fs.chmodSync) + fs.fchmodSync = chmodFixSync(fs.fchmodSync) + fs.lchmodSync = chmodFixSync(fs.lchmodSync) + + fs.stat = statFix(fs.stat) + fs.fstat = statFix(fs.fstat) + fs.lstat = statFix(fs.lstat) + + fs.statSync = statFixSync(fs.statSync) + fs.fstatSync = statFixSync(fs.fstatSync) + fs.lstatSync = statFixSync(fs.lstatSync) + + // if lchmod/lchown do not exist, then make them no-ops + if (!fs.lchmod) { + fs.lchmod = function (path, mode, cb) { + if (cb) process.nextTick(cb) + } + fs.lchmodSync = function () {} + } + if (!fs.lchown) { + fs.lchown = function (path, uid, gid, cb) { + if (cb) process.nextTick(cb) + } + fs.lchownSync = function () {} + } + + // on Windows, A/V software can lock the directory, causing this + // to fail with an EACCES or EPERM if the directory contains newly + // created files. Try again on failure, for up to 60 seconds. + + // Set the timeout this long because some Windows Anti-Virus, such as Parity + // bit9, may lock files for up to a minute, causing npm package install + // failures. Also, take care to yield the scheduler. Windows scheduling gives + // CPU to a busy looping process, which can cause the program causing the lock + // contention to be starved of CPU by node, so the contention doesn't resolve. + if (platform === "win32") { + fs.rename = (function (fs$rename) { return function (from, to, cb) { + var start = Date.now() + var backoff = 0; + fs$rename(from, to, function CB (er) { + if (er + && (er.code === "EACCES" || er.code === "EPERM") + && Date.now() - start < 60000) { + setTimeout(function() { + fs.stat(to, function (stater, st) { + if (stater && stater.code === "ENOENT") + fs$rename(from, to, CB); + else + cb(er) + }) + }, backoff) + if (backoff < 100) + backoff += 10; + return; + } + if (cb) cb(er) + }) + }})(fs.rename) + } + + // if read() returns EAGAIN, then just try it again. + fs.read = (function (fs$read) { + function read (fd, buffer, offset, length, position, callback_) { + var callback + if (callback_ && typeof callback_ === 'function') { + var eagCounter = 0 + callback = function (er, _, __) { + if (er && er.code === 'EAGAIN' && eagCounter < 10) { + eagCounter ++ + return fs$read.call(fs, fd, buffer, offset, length, position, callback) + } + callback_.apply(this, arguments) + } + } + return fs$read.call(fs, fd, buffer, offset, length, position, callback) + } + + // This ensures `util.promisify` works as it does for native `fs.read`. + if (Object.setPrototypeOf) Object.setPrototypeOf(read, fs$read) + return read + })(fs.read) + + fs.readSync = (function (fs$readSync) { return function (fd, buffer, offset, length, position) { + var eagCounter = 0 + while (true) { + try { + return fs$readSync.call(fs, fd, buffer, offset, length, position) + } catch (er) { + if (er.code === 'EAGAIN' && eagCounter < 10) { + eagCounter ++ + continue + } + throw er + } + } + }})(fs.readSync) + + function patchLchmod (fs) { + fs.lchmod = function (path, mode, callback) { + fs.open( path + , constants.O_WRONLY | constants.O_SYMLINK + , mode + , function (err, fd) { + if (err) { + if (callback) callback(err) + return + } + // prefer to return the chmod error, if one occurs, + // but still try to close, and report closing errors if they occur. + fs.fchmod(fd, mode, function (err) { + fs.close(fd, function(err2) { + if (callback) callback(err || err2) + }) + }) + }) + } + + fs.lchmodSync = function (path, mode) { + var fd = fs.openSync(path, constants.O_WRONLY | constants.O_SYMLINK, mode) + + // prefer to return the chmod error, if one occurs, + // but still try to close, and report closing errors if they occur. + var threw = true + var ret + try { + ret = fs.fchmodSync(fd, mode) + threw = false + } finally { + if (threw) { + try { + fs.closeSync(fd) + } catch (er) {} + } else { + fs.closeSync(fd) + } + } + return ret + } + } + + function patchLutimes (fs) { + if (constants.hasOwnProperty("O_SYMLINK")) { + fs.lutimes = function (path, at, mt, cb) { + fs.open(path, constants.O_SYMLINK, function (er, fd) { + if (er) { + if (cb) cb(er) + return + } + fs.futimes(fd, at, mt, function (er) { + fs.close(fd, function (er2) { + if (cb) cb(er || er2) + }) + }) + }) + } + + fs.lutimesSync = function (path, at, mt) { + var fd = fs.openSync(path, constants.O_SYMLINK) + var ret + var threw = true + try { + ret = fs.futimesSync(fd, at, mt) + threw = false + } finally { + if (threw) { + try { + fs.closeSync(fd) + } catch (er) {} + } else { + fs.closeSync(fd) + } + } + return ret + } + + } else { + fs.lutimes = function (_a, _b, _c, cb) { if (cb) process.nextTick(cb) } + fs.lutimesSync = function () {} + } + } + + function chmodFix (orig) { + if (!orig) return orig + return function (target, mode, cb) { + return orig.call(fs, target, mode, function (er) { + if (chownErOk(er)) er = null + if (cb) cb.apply(this, arguments) + }) + } + } + + function chmodFixSync (orig) { + if (!orig) return orig + return function (target, mode) { + try { + return orig.call(fs, target, mode) + } catch (er) { + if (!chownErOk(er)) throw er + } + } + } + + + function chownFix (orig) { + if (!orig) return orig + return function (target, uid, gid, cb) { + return orig.call(fs, target, uid, gid, function (er) { + if (chownErOk(er)) er = null + if (cb) cb.apply(this, arguments) + }) + } + } + + function chownFixSync (orig) { + if (!orig) return orig + return function (target, uid, gid) { + try { + return orig.call(fs, target, uid, gid) + } catch (er) { + if (!chownErOk(er)) throw er + } + } + } + + function statFix (orig) { + if (!orig) return orig + // Older versions of Node erroneously returned signed integers for + // uid + gid. + return function (target, options, cb) { + if (typeof options === 'function') { + cb = options + options = null + } + function callback (er, stats) { + if (stats) { + if (stats.uid < 0) stats.uid += 0x100000000 + if (stats.gid < 0) stats.gid += 0x100000000 + } + if (cb) cb.apply(this, arguments) + } + return options ? orig.call(fs, target, options, callback) + : orig.call(fs, target, callback) + } + } + + function statFixSync (orig) { + if (!orig) return orig + // Older versions of Node erroneously returned signed integers for + // uid + gid. + return function (target, options) { + var stats = options ? orig.call(fs, target, options) + : orig.call(fs, target) + if (stats) { + if (stats.uid < 0) stats.uid += 0x100000000 + if (stats.gid < 0) stats.gid += 0x100000000 + } + return stats; + } + } + + // ENOSYS means that the fs doesn't support the op. Just ignore + // that, because it doesn't matter. + // + // if there's no getuid, or if getuid() is something other + // than 0, and the error is EINVAL or EPERM, then just ignore + // it. + // + // This specific case is a silent failure in cp, install, tar, + // and most other unix tools that manage permissions. + // + // When running as root, or if other types of errors are + // encountered, then it's strict. + function chownErOk (er) { + if (!er) + return true + + if (er.code === "ENOSYS") + return true + + var nonroot = !process.getuid || process.getuid() !== 0 + if (nonroot) { + if (er.code === "EINVAL" || er.code === "EPERM") + return true + } + + return false + } +} |