--- /dev/null
+var fs = require('./fs.js')
+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) {}
+
+var chdir = process.chdir
+process.chdir = function(d) {
+ cwd = null
+ chdir.call(process, d)
+}
+
+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) { return function (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)
+ }})(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, cb) {
+ return orig.call(fs, target, function (er, stats) {
+ if (!stats) return cb.apply(this, arguments)
+ if (stats.uid < 0) stats.uid += 0x100000000
+ if (stats.gid < 0) stats.gid += 0x100000000
+ if (cb) cb.apply(this, arguments)
+ })
+ }
+}
+
+function statFixSync (orig) {
+ if (!orig) return orig
+ // Older versions of Node erroneously returned signed integers for
+ // uid + gid.
+ return function (target) {
+ var stats = orig.call(fs, target)
+ 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
+}
projects / yaffs-website / blobdiff