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.chmod && !fs.lchmod) {
|
fs.lchmod = function (path, mode, cb) {
|
if (cb) process.nextTick(cb)
|
}
|
fs.lchmodSync = function () {}
|
}
|
if (fs.chown && !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 = typeof fs.rename !== 'function' ? fs.rename
|
: (function (fs$rename) {
|
function rename (from, to, cb) {
|
var start = Date.now()
|
var backoff = 0;
|
fs$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$rename(from, to, CB);
|
else
|
cb(er)
|
})
|
}, backoff)
|
if (backoff < 100)
|
backoff += 10;
|
return;
|
}
|
if (cb) cb(er)
|
})
|
}
|
if (Object.setPrototypeOf) Object.setPrototypeOf(rename, fs$rename)
|
return rename
|
})(fs.rename)
|
}
|
|
// if read() returns EAGAIN, then just try it again.
|
fs.read = typeof fs.read !== 'function' ? 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 = typeof fs.readSync !== 'function' ? 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.futimes) {
|
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 if (fs.futimes) {
|
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
|
}
|
}
|
