| var fs = require('fs') |
| var constants = require('constants') |
| |
| var origCwd = process.cwd |
| var cwd = null |
| process.cwd = function() { |
| if (!cwd) |
| cwd = origCwd.call(process) |
| return cwd |
| } |
| var chdir = process.chdir |
| process.chdir = function(d) { |
| cwd = null |
| chdir.call(process, d) |
| } |
| |
| // (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\./)) { |
| fs.lchmod = function (path, mode, callback) { |
| callback = callback || noop |
| fs.open( path |
| , constants.O_WRONLY | constants.O_SYMLINK |
| , mode |
| , function (err, fd) { |
| if (err) { |
| 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) { |
| 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 err, err2 |
| try { |
| var ret = fs.fchmodSync(fd, mode) |
| } catch (er) { |
| err = er |
| } |
| try { |
| fs.closeSync(fd) |
| } catch (er) { |
| err2 = er |
| } |
| if (err || err2) throw (err || err2) |
| return ret |
| } |
| } |
| |
| |
| // lutimes implementation, or no-op |
| if (!fs.lutimes) { |
| if (constants.hasOwnProperty("O_SYMLINK")) { |
| fs.lutimes = function (path, at, mt, cb) { |
| fs.open(path, constants.O_SYMLINK, function (er, fd) { |
| cb = cb || noop |
| if (er) return cb(er) |
| fs.futimes(fd, at, mt, function (er) { |
| fs.close(fd, function (er2) { |
| return cb(er || er2) |
| }) |
| }) |
| }) |
| } |
| |
| fs.lutimesSync = function (path, at, mt) { |
| var fd = fs.openSync(path, constants.O_SYMLINK) |
| , err |
| , err2 |
| , ret |
| |
| try { |
| var ret = fs.futimesSync(fd, at, mt) |
| } catch (er) { |
| err = er |
| } |
| try { |
| fs.closeSync(fd) |
| } catch (er) { |
| err2 = er |
| } |
| if (err || err2) throw (err || err2) |
| return ret |
| } |
| |
| } else if (fs.utimensat && constants.hasOwnProperty("AT_SYMLINK_NOFOLLOW")) { |
| // maybe utimensat will be bound soonish? |
| fs.lutimes = function (path, at, mt, cb) { |
| fs.utimensat(path, at, mt, constants.AT_SYMLINK_NOFOLLOW, cb) |
| } |
| |
| fs.lutimesSync = function (path, at, mt) { |
| return fs.utimensatSync(path, at, mt, constants.AT_SYMLINK_NOFOLLOW) |
| } |
| |
| } else { |
| fs.lutimes = function (_a, _b, _c, cb) { process.nextTick(cb) } |
| fs.lutimesSync = function () {} |
| } |
| } |
| |
| |
| // https://github.com/isaacs/node-graceful-fs/issues/4 |
| // Chown should not fail on einval or eperm if non-root. |
| |
| fs.chown = chownFix(fs.chown) |
| fs.fchown = chownFix(fs.fchown) |
| fs.lchown = chownFix(fs.lchown) |
| |
| fs.chownSync = chownFixSync(fs.chownSync) |
| fs.fchownSync = chownFixSync(fs.fchownSync) |
| fs.lchownSync = chownFixSync(fs.lchownSync) |
| |
| function chownFix (orig) { |
| if (!orig) return orig |
| return function (target, uid, gid, cb) { |
| return orig.call(fs, target, uid, gid, function (er, res) { |
| if (chownErOk(er)) er = null |
| cb(er, res) |
| }) |
| } |
| } |
| |
| 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 chownErOk (er) { |
| // 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. |
| if (!er || (!process.getuid || process.getuid() !== 0) |
| && (er.code === "EINVAL" || er.code === "EPERM")) return true |
| } |
| |
| |
| // if lchmod/lchown do not exist, then make them no-ops |
| if (!fs.lchmod) { |
| fs.lchmod = function (path, mode, cb) { |
| process.nextTick(cb) |
| } |
| fs.lchmodSync = function () {} |
| } |
| if (!fs.lchown) { |
| fs.lchown = function (path, uid, gid, 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 1 second. |
| if (process.platform === "win32") { |
| var rename_ = fs.rename |
| fs.rename = function rename (from, to, cb) { |
| var start = Date.now() |
| rename_(from, to, function CB (er) { |
| if (er |
| && (er.code === "EACCES" || er.code === "EPERM") |
| && Date.now() - start < 1000) { |
| return rename_(from, to, CB) |
| } |
| cb(er) |
| }) |
| } |
| } |
| |
| |
| // if read() returns EAGAIN, then just try it again. |
| var read = fs.read |
| fs.read = 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 read.call(fs, fd, buffer, offset, length, position, callback) |
| } |
| callback_.apply(this, arguments) |
| } |
| } |
| return read.call(fs, fd, buffer, offset, length, position, callback) |
| } |
| |
| var readSync = fs.readSync |
| fs.readSync = function (fd, buffer, offset, length, position) { |
| var eagCounter = 0 |
| while (true) { |
| try { |
| return readSync.call(fs, fd, buffer, offset, length, position) |
| } catch (er) { |
| if (er.code === 'EAGAIN' && eagCounter < 10) { |
| eagCounter ++ |
| continue |
| } |
| throw er |
| } |
| } |
| } |
| |