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1935 |
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1
1
2
3
3
3
946
5
1
5
946
4
4
3
3
3
946
77
76
946
1
1
1
946
1
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1
1
1
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9
946
6
6
6
5
5
5
946
68
67
946
4
4
3
3
3
946
5
4
946
1
1
1
946
158
158
156
156
156
946
46
37
36
36
36
946
2198
946
7527
7525
946
4047
4046
946
25
25
24
24
24
946
23
22
946
29
29
946
6
6
6
5
4
4
4
946
27
27
26
25
946
5
5
4
3
3
3
946
4
3
2
946
4
4
3
3
3
946
109
108
946
2
2
2
946
2
946
946
1
1
1
1
1
1
946
1
1
1
1
1
1
1
1
946
3
3
2
2
2
946
7
6
946
946
946
946
946
946
1
1
946
1
946
96
20
76
76
946
946
9
9
8
8
8
946
9
8
8
8
946
8
8
8
8
8
946
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8
8
946
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10
10
10
946
12
12
6
6
6
12
12
12
12
2
10
10
10
946
42
32
10
1
9
42
42
42
40
34
40
40
40
40
40
37
35
35
35
30
40
946
5
5
4
1
1
5
1
5
946
7
5
2
2
7
2
7
946
6
6
6
6
6
5
5
946
946
6
6
6
946
5
946
7
6
6
6
6
2
2
4
4
6
6
6
6
6
4
6
946
2
2
2
2
2
1
1
1
2
2
946
946
2
2
946
2
946
946
3
946
3
2
2
2
2
2
2
2
2
2
2
2
2
2
946
2
1
1
1
1
1
1
1
1
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18
1847
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1882
1847
12464
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12464
12464
4943
7521
7521
1
7520
7519
7484
7484
7484
35
35
35
35
13
35
22
21
34
34
34
35
35
1845
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16
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2
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16
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50
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405
13
13
392
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238
154
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152
117
117
117
35
35
35
13
22
22
21
21
21
946
34
34
34
34
946
34
34
946
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217
217
946
140
946
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148
3
145
145
145
145
145
145
145
145
145
145
145
145
145
15
1
14
6
8
1
13
2
11
141
133
141
30
27
946
946
133
133
133
4
4
4
4
129
129
129
946
358
132
26
226
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217
217
226
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22
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5
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17
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3
1
3
218
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218
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6
91
91
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111
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141
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2
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4
1
3
1
2
117
117
117
946
946
117
117
117
117
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247
247
110
110
137
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1
1
136
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137
2
946
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| (function () { // Maintainers, keep in mind that ES1-style octal literals (`0666`) are not
// allowed in strict mode. Use ES6-style octal literals instead (`0o666`).
'use strict';
const SlowBuffer = require('buffer').SlowBuffer;
const util = require('util');
const pathModule = require('path');
const binding = process.binding('fs');
const constants = require('constants');
const fs = exports;
const Stream = require('stream').Stream;
const EventEmitter = require('events').EventEmitter;
const FSReqWrap = binding.FSReqWrap;
const FSEvent = process.binding('fs_event_wrap').FSEvent;
const Readable = Stream.Readable;
const Writable = Stream.Writable;
const kMinPoolSpace = 128;
const kMaxLength = require('smalloc').kMaxLength;
const O_APPEND = constants.O_APPEND || 0;
const O_CREAT = constants.O_CREAT || 0;
const O_EXCL = constants.O_EXCL || 0;
const O_RDONLY = constants.O_RDONLY || 0;
const O_RDWR = constants.O_RDWR || 0;
const O_SYNC = constants.O_SYNC || 0;
const O_TRUNC = constants.O_TRUNC || 0;
const O_WRONLY = constants.O_WRONLY || 0;
const isWindows = process.platform === 'win32';
const DEBUG = process.env.NODE_DEBUG && /fs/.test(process.env.NODE_DEBUG);
const errnoException = util._errnoException;
function rethrow() {
// Only enable in debug mode. A backtrace uses ~1000 bytes of heap space and
// is fairly slow to generate.
Iif (DEBUG) {
var backtrace = new Error();
return function(err) {
if (err) {
backtrace.stack = err.name + ': ' + err.message +
backtrace.stack.substr(backtrace.name.length);
err = backtrace;
throw err;
}
};
}
return function(err) {
Iif (err) {
throw err; // Forgot a callback but don't know where? Use NODE_DEBUG=fs
}
};
}
function maybeCallback(cb) {
return typeof cb === 'function' ? cb : rethrow();
}
// Ensure that callbacks run in the global context. Only use this function
// for callbacks that are passed to the binding layer, callbacks that are
// invoked from JS already run in the proper scope.
function makeCallback(cb) {
if (cb === undefined) {
return rethrow();
}
if (typeof cb !== 'function') {
throw new TypeError('callback must be a function');
}
return function() {
return cb.apply(null, arguments);
};
}
function assertEncoding(encoding) {
Iif (encoding && !Buffer.isEncoding(encoding)) {
throw new Error('Unknown encoding: ' + encoding);
}
}
function nullCheck(path, callback) {
if (('' + path).indexOf('\u0000') !== -1) {
var er = new Error('Path must be a string without null bytes.');
er.code = 'ENOENT';
if (typeof callback !== 'function')
throw er;
process.nextTick(nullCheckCallNT, callback, er);
return false;
}
return true;
}
function nullCheckCallNT(callback, er) {
callback(er);
}
// Static method to set the stats properties on a Stats object.
fs.Stats = function(
dev,
mode,
nlink,
uid,
gid,
rdev,
blksize,
ino,
size,
blocks,
atim_msec,
mtim_msec,
ctim_msec,
birthtim_msec) {
this.dev = dev;
this.mode = mode;
this.nlink = nlink;
this.uid = uid;
this.gid = gid;
this.rdev = rdev;
this.blksize = blksize;
this.ino = ino;
this.size = size;
this.blocks = blocks;
this.atime = new Date(atim_msec);
this.mtime = new Date(mtim_msec);
this.ctime = new Date(ctim_msec);
this.birthtime = new Date(birthtim_msec);
};
// Create a C++ binding to the function which creates a Stats object.
binding.FSInitialize(fs.Stats);
fs.Stats.prototype._checkModeProperty = function(property) {
return ((this.mode & constants.S_IFMT) === property);
};
fs.Stats.prototype.isDirectory = function() {
return this._checkModeProperty(constants.S_IFDIR);
};
fs.Stats.prototype.isFile = function() {
return this._checkModeProperty(constants.S_IFREG);
};
fs.Stats.prototype.isBlockDevice = function() {
return this._checkModeProperty(constants.S_IFBLK);
};
fs.Stats.prototype.isCharacterDevice = function() {
return this._checkModeProperty(constants.S_IFCHR);
};
fs.Stats.prototype.isSymbolicLink = function() {
return this._checkModeProperty(constants.S_IFLNK);
};
fs.Stats.prototype.isFIFO = function() {
return this._checkModeProperty(constants.S_IFIFO);
};
fs.Stats.prototype.isSocket = function() {
return this._checkModeProperty(constants.S_IFSOCK);
};
// Don't allow mode to accidentally be overwritten.
['F_OK', 'R_OK', 'W_OK', 'X_OK'].forEach(function(key) {
Object.defineProperty(fs, key, {
enumerable: true, value: constants[key] || 0, writable: false
});
});
fs.access = function(path, mode, callback) {
if (typeof mode === 'function') {
callback = mode;
mode = fs.F_OK;
} else if (typeof callback !== 'function') {
throw new TypeError('callback must be a function');
}
if (!nullCheck(path, callback))
return;
mode = mode | 0;
var req = new FSReqWrap();
req.oncomplete = makeCallback(callback);
binding.access(pathModule._makeLong(path), mode, req);
};
fs.accessSync = function(path, mode) {
nullCheck(path);
if (mode === undefined)
mode = fs.F_OK;
else
mode = mode | 0;
binding.access(pathModule._makeLong(path), mode);
};
fs.exists = function(path, callback) {
if (!nullCheck(path, cb)) return;
var req = new FSReqWrap();
req.oncomplete = cb;
binding.stat(pathModule._makeLong(path), req);
function cb(err, stats) {
Eif (callback) callback(err ? false : true);
}
};
fs.existsSync = function(path) {
try {
nullCheck(path);
binding.stat(pathModule._makeLong(path));
return true;
} catch (e) {
return false;
}
};
fs.readFile = function(path, options, callback_) {
var callback = maybeCallback(arguments[arguments.length - 1]);
if (!options || typeof options === 'function')
options = { encoding: null, flag: 'r' };
else Eif (typeof options === 'string')
options = { encoding: options, flag: 'r' };
else if (typeof options !== 'object')
throw new TypeError('Bad arguments');
var encoding = options.encoding;
assertEncoding(encoding);
var flag = options.flag || 'r';
if (!nullCheck(path, callback))
return;
var context = new ReadFileContext(callback, encoding);
var req = new FSReqWrap();
req.context = context;
req.oncomplete = readFileAfterOpen;
binding.open(pathModule._makeLong(path),
stringToFlags(flag),
0o666,
req);
};
const kReadFileBufferLength = 8 * 1024;
function ReadFileContext(callback, encoding) {
this.fd = undefined;
this.size = undefined;
this.callback = callback;
this.buffers = null;
this.buffer = null;
this.pos = 0;
this.encoding = encoding;
this.err = null;
}
ReadFileContext.prototype.read = function() {
var fd = this.fd;
var size = this.size;
var buffer;
var offset;
var length;
if (size === 0) {
buffer = this.buffer = new SlowBuffer(kReadFileBufferLength);
offset = 0;
length = kReadFileBufferLength;
} else {
buffer = this.buffer;
offset = this.pos;
length = size - this.pos;
}
var req = new FSReqWrap();
req.oncomplete = readFileAfterRead;
req.context = this;
binding.read(fd, buffer, offset, length, -1, req);
};
ReadFileContext.prototype.close = function(err) {
var req = new FSReqWrap();
req.oncomplete = readFileAfterClose;
req.context = this;
this.err = err;
binding.close(this.fd, req);
};
function readFileAfterOpen(err, fd) {
var context = this.context;
if (err) {
var callback = context.callback;
callback(err);
return;
}
context.fd = fd;
var req = new FSReqWrap();
req.oncomplete = readFileAfterStat;
req.context = context;
binding.fstat(fd, req);
}
function readFileAfterStat(err, st) {
var context = this.context;
Iif (err)
return context.close(err);
var size = context.size = st.isFile() ? st.size : 0;
if (size === 0) {
context.buffers = [];
context.read();
return;
}
Iif (size > kMaxLength) {
err = new RangeError('File size is greater than possible Buffer: ' +
`0x${kMaxLength.toString(16)} bytes`);
return context.close(err);
}
context.buffer = new SlowBuffer(size);
context.read();
}
function readFileAfterRead(err, bytesRead) {
var context = this.context;
Iif (err)
return context.close(err);
if (bytesRead === 0)
return context.close();
context.pos += bytesRead;
if (context.size !== 0) {
Eif (context.pos === context.size)
context.close();
else
context.read();
} else {
// unknown size, just read until we don't get bytes.
context.buffers.push(context.buffer.slice(0, bytesRead));
context.read();
}
}
function readFileAfterClose(err) {
var context = this.context;
var buffer = null;
var callback = context.callback;
Iif (context.err)
return callback(context.err);
if (context.size === 0)
buffer = Buffer.concat(context.buffers, context.pos);
else Iif (context.pos < context.size)
buffer = context.buffer.slice(0, context.pos);
else
buffer = context.buffer;
if (context.encoding)
buffer = buffer.toString(context.encoding);
callback(err, buffer);
}
fs.readFileSync = function(path, options) {
if (!options) {
options = { encoding: null, flag: 'r' };
} else if (typeof options === 'string') {
options = { encoding: options, flag: 'r' };
} else Iif (typeof options !== 'object') {
throw new TypeError('Bad arguments');
}
var encoding = options.encoding;
assertEncoding(encoding);
var flag = options.flag || 'r';
var fd = fs.openSync(path, flag, 0o666);
var st;
var size;
var threw = true;
try {
st = fs.fstatSync(fd);
size = st.isFile() ? st.size : 0;
threw = false;
} finally {
if (threw) fs.closeSync(fd);
}
var pos = 0;
var buffer; // single buffer with file data
var buffers; // list for when size is unknown
if (size === 0) {
buffers = [];
} else {
var threw = true;
try {
buffer = new Buffer(size);
threw = false;
} finally {
Iif (threw) fs.closeSync(fd);
}
}
var done = false;
while (!done) {
var threw = true;
try {
if (size !== 0) {
var bytesRead = fs.readSync(fd, buffer, pos, size - pos);
} else {
// the kernel lies about many files.
// Go ahead and try to read some bytes.
buffer = new Buffer(8192);
var bytesRead = fs.readSync(fd, buffer, 0, 8192);
if (bytesRead) {
buffers.push(buffer.slice(0, bytesRead));
}
}
threw = false;
} finally {
Iif (threw) fs.closeSync(fd);
}
pos += bytesRead;
done = (bytesRead === 0) || (size !== 0 && pos >= size);
}
fs.closeSync(fd);
if (size === 0) {
// data was collected into the buffers list.
buffer = Buffer.concat(buffers, pos);
} else Iif (pos < size) {
buffer = buffer.slice(0, pos);
}
if (encoding) buffer = buffer.toString(encoding);
return buffer;
};
// Used by binding.open and friends
function stringToFlags(flag) {
// Only mess with strings
if (typeof flag !== 'string') {
return flag;
}
switch (flag) {
case 'r' : return O_RDONLY;
case 'rs' : // fall through
case 'sr' : return O_RDONLY | O_SYNC;
case 'r+' : return O_RDWR;
case 'rs+' : // fall through
case 'sr+' : return O_RDWR | O_SYNC;
case 'w' : return O_TRUNC | O_CREAT | O_WRONLY;
case 'wx' : // fall through
case 'xw' : return O_TRUNC | O_CREAT | O_WRONLY | O_EXCL;
case 'w+' : return O_TRUNC | O_CREAT | O_RDWR;
case 'wx+': // fall through
case 'xw+': return O_TRUNC | O_CREAT | O_RDWR | O_EXCL;
case 'a' : return O_APPEND | O_CREAT | O_WRONLY;
case 'ax' : // fall through
case 'xa' : return O_APPEND | O_CREAT | O_WRONLY | O_EXCL;
case 'a+' : return O_APPEND | O_CREAT | O_RDWR;
case 'ax+': // fall through
case 'xa+': return O_APPEND | O_CREAT | O_RDWR | O_EXCL;
}
throw new Error('Unknown file open flag: ' + flag);
}
// exported but hidden, only used by test/simple/test-fs-open-flags.js
Object.defineProperty(exports, '_stringToFlags', {
enumerable: false,
value: stringToFlags
});
// Yes, the follow could be easily DRYed up but I provide the explicit
// list to make the arguments clear.
fs.close = function(fd, callback) {
var req = new FSReqWrap();
req.oncomplete = makeCallback(callback);
binding.close(fd, req);
};
fs.closeSync = function(fd) {
return binding.close(fd);
};
function modeNum(m, def) {
if (typeof m === 'number')
return m;
if (typeof m === 'string')
return parseInt(m, 8);
Eif (def)
return modeNum(def);
return undefined;
}
fs.open = function(path, flags, mode, callback) {
callback = makeCallback(arguments[arguments.length - 1]);
mode = modeNum(mode, 0o666);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.open(pathModule._makeLong(path),
stringToFlags(flags),
mode,
req);
};
fs.openSync = function(path, flags, mode) {
mode = modeNum(mode, 0o666);
nullCheck(path);
return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
};
fs.read = function(fd, buffer, offset, length, position, callback) {
if (!(buffer instanceof Buffer)) {
// legacy string interface (fd, length, position, encoding, callback)
var cb = arguments[4],
encoding = arguments[3];
assertEncoding(encoding);
position = arguments[2];
length = arguments[1];
buffer = new Buffer(length);
offset = 0;
callback = function(err, bytesRead) {
Iif (!cb) return;
var str = (bytesRead > 0) ? buffer.toString(encoding, 0, bytesRead) : '';
(cb)(err, str, bytesRead);
};
}
function wrapper(err, bytesRead) {
// Retain a reference to buffer so that it can't be GC'ed too soon.
callback && callback(err, bytesRead || 0, buffer);
}
var req = new FSReqWrap();
req.oncomplete = wrapper;
binding.read(fd, buffer, offset, length, position, req);
};
fs.readSync = function(fd, buffer, offset, length, position) {
var legacy = false;
if (!(buffer instanceof Buffer)) {
// legacy string interface (fd, length, position, encoding, callback)
legacy = true;
var encoding = arguments[3];
assertEncoding(encoding);
position = arguments[2];
length = arguments[1];
buffer = new Buffer(length);
offset = 0;
}
var r = binding.read(fd, buffer, offset, length, position);
if (!legacy) {
return r;
}
var str = (r > 0) ? buffer.toString(encoding, 0, r) : '';
return [str, r];
};
// usage:
// fs.write(fd, buffer, offset, length[, position], callback);
// OR
// fs.write(fd, string[, position[, encoding]], callback);
fs.write = function(fd, buffer, offset, length, position, callback) {
function strWrapper(err, written) {
// Retain a reference to buffer so that it can't be GC'ed too soon.
callback(err, written || 0, buffer);
}
function bufWrapper(err, written) {
// retain reference to string in case it's external
callback(err, written || 0, buffer);
}
if (buffer instanceof Buffer) {
// if no position is passed then assume null
Iif (typeof position === 'function') {
callback = position;
position = null;
}
callback = maybeCallback(callback);
var req = new FSReqWrap();
req.oncomplete = strWrapper;
return binding.writeBuffer(fd, buffer, offset, length, position, req);
}
if (typeof buffer !== 'string')
buffer += '';
if (typeof position !== 'function') {
Iif (typeof offset === 'function') {
position = offset;
offset = null;
} else {
position = length;
}
length = 'utf8';
}
callback = maybeCallback(position);
var req = new FSReqWrap();
req.oncomplete = bufWrapper;
return binding.writeString(fd, buffer, offset, length, req);
};
// usage:
// fs.writeSync(fd, buffer, offset, length[, position]);
// OR
// fs.writeSync(fd, string[, position[, encoding]]);
fs.writeSync = function(fd, buffer, offset, length, position) {
if (buffer instanceof Buffer) {
if (position === undefined)
position = null;
return binding.writeBuffer(fd, buffer, offset, length, position);
}
Iif (typeof buffer !== 'string')
buffer += '';
Eif (offset === undefined)
offset = null;
return binding.writeString(fd, buffer, offset, length, position);
};
fs.rename = function(oldPath, newPath, callback) {
callback = makeCallback(callback);
if (!nullCheck(oldPath, callback)) return;
if (!nullCheck(newPath, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.rename(pathModule._makeLong(oldPath),
pathModule._makeLong(newPath),
req);
};
fs.renameSync = function(oldPath, newPath) {
nullCheck(oldPath);
nullCheck(newPath);
return binding.rename(pathModule._makeLong(oldPath),
pathModule._makeLong(newPath));
};
fs.truncate = function(path, len, callback) {
if (typeof path === 'number') {
return fs.ftruncate(path, len, callback);
}
if (typeof len === 'function') {
callback = len;
len = 0;
} else Iif (len === undefined) {
len = 0;
}
callback = maybeCallback(callback);
fs.open(path, 'r+', function(er, fd) {
if (er) return callback(er);
var req = new FSReqWrap();
req.oncomplete = function ftruncateCb(er) {
fs.close(fd, function(er2) {
callback(er || er2);
});
};
binding.ftruncate(fd, len, req);
});
};
fs.truncateSync = function(path, len) {
Iif (typeof path === 'number') {
// legacy
return fs.ftruncateSync(path, len);
}
if (len === undefined) {
len = 0;
}
// allow error to be thrown, but still close fd.
var fd = fs.openSync(path, 'r+');
try {
var ret = fs.ftruncateSync(fd, len);
} finally {
fs.closeSync(fd);
}
return ret;
};
fs.ftruncate = function(fd, len, callback) {
if (typeof len === 'function') {
callback = len;
len = 0;
} else Iif (len === undefined) {
len = 0;
}
var req = new FSReqWrap();
req.oncomplete = makeCallback(callback);
binding.ftruncate(fd, len, req);
};
fs.ftruncateSync = function(fd, len) {
if (len === undefined) {
len = 0;
}
return binding.ftruncate(fd, len);
};
fs.rmdir = function(path, callback) {
callback = maybeCallback(callback);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.rmdir(pathModule._makeLong(path), req);
};
fs.rmdirSync = function(path) {
nullCheck(path);
return binding.rmdir(pathModule._makeLong(path));
};
fs.fdatasync = function(fd, callback) {
var req = new FSReqWrap();
req.oncomplete = makeCallback(callback);
binding.fdatasync(fd, req);
};
fs.fdatasyncSync = function(fd) {
return binding.fdatasync(fd);
};
fs.fsync = function(fd, callback) {
var req = new FSReqWrap();
req.oncomplete = makeCallback(callback);
binding.fsync(fd, req);
};
fs.fsyncSync = function(fd) {
return binding.fsync(fd);
};
fs.mkdir = function(path, mode, callback) {
if (typeof mode === 'function') callback = mode;
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.mkdir(pathModule._makeLong(path),
modeNum(mode, 0o777),
req);
};
fs.mkdirSync = function(path, mode) {
nullCheck(path);
return binding.mkdir(pathModule._makeLong(path),
modeNum(mode, 0o777));
};
fs.readdir = function(path, callback) {
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.readdir(pathModule._makeLong(path), req);
};
fs.readdirSync = function(path) {
nullCheck(path);
return binding.readdir(pathModule._makeLong(path));
};
fs.fstat = function(fd, callback) {
var req = new FSReqWrap();
req.oncomplete = makeCallback(callback);
binding.fstat(fd, req);
};
fs.lstat = function(path, callback) {
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.lstat(pathModule._makeLong(path), req);
};
fs.stat = function(path, callback) {
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.stat(pathModule._makeLong(path), req);
};
fs.fstatSync = function(fd) {
return binding.fstat(fd);
};
fs.lstatSync = function(path) {
nullCheck(path);
return binding.lstat(pathModule._makeLong(path));
};
fs.statSync = function(path) {
nullCheck(path);
return binding.stat(pathModule._makeLong(path));
};
fs.readlink = function(path, callback) {
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.readlink(pathModule._makeLong(path), req);
};
fs.readlinkSync = function(path) {
nullCheck(path);
return binding.readlink(pathModule._makeLong(path));
};
function preprocessSymlinkDestination(path, type, linkPath) {
Eif (!isWindows) {
// No preprocessing is needed on Unix.
return path;
} else if (type === 'junction') {
// Junctions paths need to be absolute and \\?\-prefixed.
// A relative target is relative to the link's parent directory.
path = pathModule.resolve(linkPath, '..', path);
return pathModule._makeLong(path);
} else {
// Windows symlinks don't tolerate forward slashes.
return ('' + path).replace(/\//g, '\\');
}
}
fs.symlink = function(destination, path, type_, callback) {
var type = (typeof type_ === 'string' ? type_ : null);
var callback = makeCallback(arguments[arguments.length - 1]);
if (!nullCheck(destination, callback)) return;
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.symlink(preprocessSymlinkDestination(destination, type, path),
pathModule._makeLong(path),
type,
req);
};
fs.symlinkSync = function(destination, path, type) {
type = (typeof type === 'string' ? type : null);
nullCheck(destination);
nullCheck(path);
return binding.symlink(preprocessSymlinkDestination(destination, type, path),
pathModule._makeLong(path),
type);
};
fs.link = function(srcpath, dstpath, callback) {
callback = makeCallback(callback);
if (!nullCheck(srcpath, callback)) return;
if (!nullCheck(dstpath, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.link(pathModule._makeLong(srcpath),
pathModule._makeLong(dstpath),
req);
};
fs.linkSync = function(srcpath, dstpath) {
nullCheck(srcpath);
nullCheck(dstpath);
return binding.link(pathModule._makeLong(srcpath),
pathModule._makeLong(dstpath));
};
fs.unlink = function(path, callback) {
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.unlink(pathModule._makeLong(path), req);
};
fs.unlinkSync = function(path) {
nullCheck(path);
return binding.unlink(pathModule._makeLong(path));
};
fs.fchmod = function(fd, mode, callback) {
var req = new FSReqWrap();
req.oncomplete = makeCallback(callback);
binding.fchmod(fd, modeNum(mode), req);
};
fs.fchmodSync = function(fd, mode) {
return binding.fchmod(fd, modeNum(mode));
};
Eif (constants.hasOwnProperty('O_SYMLINK')) {
fs.lchmod = function(path, mode, callback) {
callback = maybeCallback(callback);
fs.open(path, constants.O_WRONLY | constants.O_SYMLINK, function(err, fd) {
Iif (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);
// 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;
}
Iif (err || err2) throw (err || err2);
return ret;
};
}
fs.chmod = function(path, mode, callback) {
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.chmod(pathModule._makeLong(path),
modeNum(mode),
req);
};
fs.chmodSync = function(path, mode) {
nullCheck(path);
return binding.chmod(pathModule._makeLong(path), modeNum(mode));
};
Eif (constants.hasOwnProperty('O_SYMLINK')) {
fs.lchown = function(path, uid, gid, callback) {
callback = maybeCallback(callback);
fs.open(path, constants.O_WRONLY | constants.O_SYMLINK, function(err, fd) {
if (err) {
callback(err);
return;
}
fs.fchown(fd, uid, gid, callback);
});
};
fs.lchownSync = function(path, uid, gid) {
var fd = fs.openSync(path, constants.O_WRONLY | constants.O_SYMLINK);
return fs.fchownSync(fd, uid, gid);
};
}
fs.fchown = function(fd, uid, gid, callback) {
var req = new FSReqWrap();
req.oncomplete = makeCallback(callback);
binding.fchown(fd, uid, gid, req);
};
fs.fchownSync = function(fd, uid, gid) {
return binding.fchown(fd, uid, gid);
};
fs.chown = function(path, uid, gid, callback) {
callback = makeCallback(callback);
Eif (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.chown(pathModule._makeLong(path), uid, gid, req);
};
fs.chownSync = function(path, uid, gid) {
nullCheck(path);
return binding.chown(pathModule._makeLong(path), uid, gid);
};
// converts Date or number to a fractional UNIX timestamp
function toUnixTimestamp(time) {
if (typeof time === 'number') {
return time;
}
Eif (util.isDate(time)) {
// convert to 123.456 UNIX timestamp
return time.getTime() / 1000;
}
throw new Error('Cannot parse time: ' + time);
}
// exported for unit tests, not for public consumption
fs._toUnixTimestamp = toUnixTimestamp;
fs.utimes = function(path, atime, mtime, callback) {
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
var req = new FSReqWrap();
req.oncomplete = callback;
binding.utimes(pathModule._makeLong(path),
toUnixTimestamp(atime),
toUnixTimestamp(mtime),
req);
};
fs.utimesSync = function(path, atime, mtime) {
nullCheck(path);
atime = toUnixTimestamp(atime);
mtime = toUnixTimestamp(mtime);
binding.utimes(pathModule._makeLong(path), atime, mtime);
};
fs.futimes = function(fd, atime, mtime, callback) {
atime = toUnixTimestamp(atime);
mtime = toUnixTimestamp(mtime);
var req = new FSReqWrap();
req.oncomplete = makeCallback(callback);
binding.futimes(fd, atime, mtime, req);
};
fs.futimesSync = function(fd, atime, mtime) {
atime = toUnixTimestamp(atime);
mtime = toUnixTimestamp(mtime);
binding.futimes(fd, atime, mtime);
};
function writeAll(fd, buffer, offset, length, position, callback) {
callback = maybeCallback(arguments[arguments.length - 1]);
// write(fd, buffer, offset, length, position, callback)
fs.write(fd, buffer, offset, length, position, function(writeErr, written) {
Iif (writeErr) {
fs.close(fd, function() {
if (callback) callback(writeErr);
});
} else {
Eif (written === length) {
fs.close(fd, callback);
} else {
offset += written;
length -= written;
if (position !== null) {
position += written;
}
writeAll(fd, buffer, offset, length, position, callback);
}
}
});
}
fs.writeFile = function(path, data, options, callback) {
var callback = maybeCallback(arguments[arguments.length - 1]);
if (!options || typeof options === 'function') {
options = { encoding: 'utf8', mode: 0o666, flag: 'w' };
} else Iif (typeof options === 'string') {
options = { encoding: options, mode: 0o666, flag: 'w' };
} else Iif (typeof options !== 'object') {
throw new TypeError('Bad arguments');
}
assertEncoding(options.encoding);
var flag = options.flag || 'w';
fs.open(path, flag, options.mode, function(openErr, fd) {
if (openErr) {
Eif (callback) callback(openErr);
} else {
var buffer = (data instanceof Buffer) ? data : new Buffer('' + data,
options.encoding || 'utf8');
var position = /a/.test(flag) ? null : 0;
writeAll(fd, buffer, 0, buffer.length, position, callback);
}
});
};
fs.writeFileSync = function(path, data, options) {
if (!options) {
options = { encoding: 'utf8', mode: 0o666, flag: 'w' };
} else if (typeof options === 'string') {
options = { encoding: options, mode: 0o666, flag: 'w' };
} else Iif (typeof options !== 'object') {
throw new TypeError('Bad arguments');
}
assertEncoding(options.encoding);
var flag = options.flag || 'w';
var fd = fs.openSync(path, flag, options.mode);
if (!(data instanceof Buffer)) {
data = new Buffer('' + data, options.encoding || 'utf8');
}
var offset = 0;
var length = data.length;
var position = /a/.test(flag) ? null : 0;
try {
while (length > 0) {
var written = fs.writeSync(fd, data, offset, length, position);
offset += written;
length -= written;
if (position !== null) {
position += written;
}
}
} finally {
fs.closeSync(fd);
}
};
fs.appendFile = function(path, data, options, callback_) {
var callback = maybeCallback(arguments[arguments.length - 1]);
if (!options || typeof options === 'function') {
options = { encoding: 'utf8', mode: 0o666, flag: 'a' };
} else Iif (typeof options === 'string') {
options = { encoding: options, mode: 0o666, flag: 'a' };
} else Iif (typeof options !== 'object') {
throw new TypeError('Bad arguments');
}
if (!options.flag)
options = util._extend({ flag: 'a' }, options);
fs.writeFile(path, data, options, callback);
};
fs.appendFileSync = function(path, data, options) {
if (!options) {
options = { encoding: 'utf8', mode: 0o666, flag: 'a' };
} else Iif (typeof options === 'string') {
options = { encoding: options, mode: 0o666, flag: 'a' };
} else Iif (typeof options !== 'object') {
throw new TypeError('Bad arguments');
}
if (!options.flag)
options = util._extend({ flag: 'a' }, options);
fs.writeFileSync(path, data, options);
};
function FSWatcher() {
EventEmitter.call(this);
var self = this;
this._handle = new FSEvent();
this._handle.owner = this;
this._handle.onchange = function(status, event, filename) {
Iif (status < 0) {
self._handle.close();
self.emit('error', errnoException(status, 'watch'));
} else {
self.emit('change', event, filename);
}
};
}
util.inherits(FSWatcher, EventEmitter);
FSWatcher.prototype.start = function(filename, persistent, recursive) {
nullCheck(filename);
var err = this._handle.start(pathModule._makeLong(filename),
persistent,
recursive);
Iif (err) {
this._handle.close();
throw errnoException(err, 'watch');
}
};
FSWatcher.prototype.close = function() {
this._handle.close();
};
fs.watch = function(filename) {
nullCheck(filename);
var watcher;
var options;
var listener;
if (arguments[1] !== null && typeof arguments[1] === 'object') {
options = arguments[1];
listener = arguments[2];
} else {
options = {};
listener = arguments[1];
}
if (options.persistent === undefined) options.persistent = true;
if (options.recursive === undefined) options.recursive = false;
watcher = new FSWatcher();
watcher.start(filename, options.persistent, options.recursive);
if (listener) {
watcher.addListener('change', listener);
}
return watcher;
};
// Stat Change Watchers
function StatWatcher() {
EventEmitter.call(this);
var self = this;
this._handle = new binding.StatWatcher();
// uv_fs_poll is a little more powerful than ev_stat but we curb it for
// the sake of backwards compatibility
var oldStatus = -1;
this._handle.onchange = function(current, previous, newStatus) {
Iif (oldStatus === -1 &&
newStatus === -1 &&
current.nlink === previous.nlink) return;
oldStatus = newStatus;
self.emit('change', current, previous);
};
this._handle.onstop = function() {
self.emit('stop');
};
}
util.inherits(StatWatcher, EventEmitter);
StatWatcher.prototype.start = function(filename, persistent, interval) {
nullCheck(filename);
this._handle.start(pathModule._makeLong(filename), persistent, interval);
};
StatWatcher.prototype.stop = function() {
this._handle.stop();
};
var statWatchers = {};
function inStatWatchers(filename) {
return Object.prototype.hasOwnProperty.call(statWatchers, filename) &&
statWatchers[filename];
}
fs.watchFile = function(filename) {
nullCheck(filename);
filename = pathModule.resolve(filename);
var stat;
var listener;
var options = {
// Poll interval in milliseconds. 5007 is what libev used to use. It's
// a little on the slow side but let's stick with it for now to keep
// behavioral changes to a minimum.
interval: 5007,
persistent: true
};
Eif (arguments[1] !== null && typeof arguments[1] === 'object') {
options = util._extend(options, arguments[1]);
listener = arguments[2];
} else {
listener = arguments[1];
}
Iif (!listener) {
throw new Error('watchFile requires a listener function');
}
Iif (inStatWatchers(filename)) {
stat = statWatchers[filename];
} else {
stat = statWatchers[filename] = new StatWatcher();
stat.start(filename, options.persistent, options.interval);
}
stat.addListener('change', listener);
return stat;
};
fs.unwatchFile = function(filename, listener) {
nullCheck(filename);
filename = pathModule.resolve(filename);
Iif (!inStatWatchers(filename)) return;
var stat = statWatchers[filename];
Iif (typeof listener === 'function') {
stat.removeListener('change', listener);
} else {
stat.removeAllListeners('change');
}
Eif (EventEmitter.listenerCount(stat, 'change') === 0) {
stat.stop();
statWatchers[filename] = undefined;
}
};
// Regexp that finds the next partion of a (partial) path
// result is [base_with_slash, base], e.g. ['somedir/', 'somedir']
Iif (isWindows) {
var nextPartRe = /(.*?)(?:[\/\\]+|$)/g;
} else {
var nextPartRe = /(.*?)(?:[\/]+|$)/g;
}
// Regex to find the device root, including trailing slash. E.g. 'c:\\'.
Iif (isWindows) {
var splitRootRe = /^(?:[a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/][^\\\/]+)?[\\\/]*/;
} else {
var splitRootRe = /^[\/]*/;
}
fs.realpathSync = function realpathSync(p, cache) {
// make p is absolute
p = pathModule.resolve(p);
if (cache && Object.prototype.hasOwnProperty.call(cache, p)) {
return cache[p];
}
var original = p,
seenLinks = {},
knownHard = {};
// current character position in p
var pos;
// the partial path so far, including a trailing slash if any
var current;
// the partial path without a trailing slash (except when pointing at a root)
var base;
// the partial path scanned in the previous round, with slash
var previous;
start();
function start() {
// Skip over roots
var m = splitRootRe.exec(p);
pos = m[0].length;
current = m[0];
base = m[0];
previous = '';
// On windows, check that the root exists. On unix there is no need.
Iif (isWindows && !knownHard[base]) {
fs.lstatSync(base);
knownHard[base] = true;
}
}
// walk down the path, swapping out linked pathparts for their real
// values
// NB: p.length changes.
while (pos < p.length) {
// find the next part
nextPartRe.lastIndex = pos;
var result = nextPartRe.exec(p);
previous = current;
current += result[0];
base = previous + result[1];
pos = nextPartRe.lastIndex;
// continue if not a symlink
if (knownHard[base] || (cache && cache[base] === base)) {
continue;
}
var resolvedLink;
if (cache && Object.prototype.hasOwnProperty.call(cache, base)) {
// some known symbolic link. no need to stat again.
resolvedLink = cache[base];
} else {
var stat = fs.lstatSync(base);
if (!stat.isSymbolicLink()) {
knownHard[base] = true;
if (cache) cache[base] = base;
continue;
}
// read the link if it wasn't read before
// dev/ino always return 0 on windows, so skip the check.
var linkTarget = null;
Eif (!isWindows) {
var id = stat.dev.toString(32) + ':' + stat.ino.toString(32);
if (seenLinks.hasOwnProperty(id)) {
linkTarget = seenLinks[id];
}
}
if (linkTarget === null) {
fs.statSync(base);
linkTarget = fs.readlinkSync(base);
}
resolvedLink = pathModule.resolve(previous, linkTarget);
// track this, if given a cache.
Iif (cache) cache[base] = resolvedLink;
Eif (!isWindows) seenLinks[id] = linkTarget;
}
// resolve the link, then start over
p = pathModule.resolve(resolvedLink, p.slice(pos));
start();
}
if (cache) cache[original] = p;
return p;
};
fs.realpath = function realpath(p, cache, cb) {
if (typeof cb !== 'function') {
cb = maybeCallback(cache);
cache = null;
}
// make p is absolute
p = pathModule.resolve(p);
if (cache && Object.prototype.hasOwnProperty.call(cache, p)) {
return process.nextTick(cb.bind(null, null, cache[p]));
}
var original = p,
seenLinks = {},
knownHard = {};
// current character position in p
var pos;
// the partial path so far, including a trailing slash if any
var current;
// the partial path without a trailing slash (except when pointing at a root)
var base;
// the partial path scanned in the previous round, with slash
var previous;
start();
function start() {
// Skip over roots
var m = splitRootRe.exec(p);
pos = m[0].length;
current = m[0];
base = m[0];
previous = '';
// On windows, check that the root exists. On unix there is no need.
Iif (isWindows && !knownHard[base]) {
fs.lstat(base, function(err) {
if (err) return cb(err);
knownHard[base] = true;
LOOP();
});
} else {
process.nextTick(LOOP);
}
}
// walk down the path, swapping out linked pathparts for their real
// values
function LOOP() {
// stop if scanned past end of path
if (pos >= p.length) {
Iif (cache) cache[original] = p;
return cb(null, p);
}
// find the next part
nextPartRe.lastIndex = pos;
var result = nextPartRe.exec(p);
previous = current;
current += result[0];
base = previous + result[1];
pos = nextPartRe.lastIndex;
// continue if not a symlink
if (knownHard[base] || (cache && cache[base] === base)) {
return process.nextTick(LOOP);
}
Iif (cache && Object.prototype.hasOwnProperty.call(cache, base)) {
// known symbolic link. no need to stat again.
return gotResolvedLink(cache[base]);
}
return fs.lstat(base, gotStat);
}
function gotStat(err, stat) {
if (err) return cb(err);
// if not a symlink, skip to the next path part
if (!stat.isSymbolicLink()) {
knownHard[base] = true;
Iif (cache) cache[base] = base;
return process.nextTick(LOOP);
}
// stat & read the link if not read before
// call gotTarget as soon as the link target is known
// dev/ino always return 0 on windows, so skip the check.
Eif (!isWindows) {
var id = stat.dev.toString(32) + ':' + stat.ino.toString(32);
if (seenLinks.hasOwnProperty(id)) {
return gotTarget(null, seenLinks[id], base);
}
}
fs.stat(base, function(err) {
if (err) return cb(err);
fs.readlink(base, function(err, target) {
Eif (!isWindows) seenLinks[id] = target;
gotTarget(err, target);
});
});
}
function gotTarget(err, target, base) {
Iif (err) return cb(err);
var resolvedLink = pathModule.resolve(previous, target);
Iif (cache) cache[base] = resolvedLink;
gotResolvedLink(resolvedLink);
}
function gotResolvedLink(resolvedLink) {
// resolve the link, then start over
p = pathModule.resolve(resolvedLink, p.slice(pos));
start();
}
};
var pool;
function allocNewPool(poolSize) {
pool = new Buffer(poolSize);
pool.used = 0;
}
fs.createReadStream = function(path, options) {
return new ReadStream(path, options);
};
util.inherits(ReadStream, Readable);
fs.ReadStream = ReadStream;
function ReadStream(path, options) {
if (!(this instanceof ReadStream))
return new ReadStream(path, options);
// a little bit bigger buffer and water marks by default
options = Object.create(options || {});
Eif (options.highWaterMark === undefined)
options.highWaterMark = 64 * 1024;
Readable.call(this, options);
this.path = path;
this.fd = options.fd === undefined ? null : options.fd;
this.flags = options.flags === undefined ? 'r' : options.flags;
this.mode = options.mode === undefined ? 0o666 : options.mode;
this.start = options.start === undefined ? undefined : options.start;
this.end = options.end === undefined ? undefined : options.end;
this.autoClose = options.autoClose === undefined ? true : options.autoClose;
this.pos = undefined;
if (this.start !== undefined) {
if (typeof this.start !== 'number') {
throw new TypeError('start must be a Number');
}
if (this.end === undefined) {
this.end = Infinity;
} else if (typeof this.end !== 'number') {
throw new TypeError('end must be a Number');
}
if (this.start > this.end) {
throw new Error('start must be <= end');
}
this.pos = this.start;
}
if (typeof this.fd !== 'number')
this.open();
this.on('end', function() {
if (this.autoClose) {
this.destroy();
}
});
}
fs.FileReadStream = fs.ReadStream; // support the legacy name
ReadStream.prototype.open = function() {
var self = this;
fs.open(this.path, this.flags, this.mode, function(er, fd) {
if (er) {
Eif (self.autoClose) {
self.destroy();
}
self.emit('error', er);
return;
}
self.fd = fd;
self.emit('open', fd);
// start the flow of data.
self.read();
});
};
ReadStream.prototype._read = function(n) {
if (typeof this.fd !== 'number')
return this.once('open', function() {
this._read(n);
});
Iif (this.destroyed)
return;
if (!pool || pool.length - pool.used < kMinPoolSpace) {
// discard the old pool.
pool = null;
allocNewPool(this._readableState.highWaterMark);
}
// Grab another reference to the pool in the case that while we're
// in the thread pool another read() finishes up the pool, and
// allocates a new one.
var thisPool = pool;
var toRead = Math.min(pool.length - pool.used, n);
var start = pool.used;
if (this.pos !== undefined)
toRead = Math.min(this.end - this.pos + 1, toRead);
// already read everything we were supposed to read!
// treat as EOF.
if (toRead <= 0)
return this.push(null);
// the actual read.
var self = this;
fs.read(this.fd, pool, pool.used, toRead, this.pos, onread);
// move the pool positions, and internal position for reading.
if (this.pos !== undefined)
this.pos += toRead;
pool.used += toRead;
function onread(er, bytesRead) {
if (er) {
if (self.autoClose) {
self.destroy();
}
self.emit('error', er);
} else {
var b = null;
if (bytesRead > 0)
b = thisPool.slice(start, start + bytesRead);
self.push(b);
}
}
};
ReadStream.prototype.destroy = function() {
if (this.destroyed)
return;
this.destroyed = true;
this.close();
};
ReadStream.prototype.close = function(cb) {
var self = this;
Iif (cb)
this.once('close', cb);
if (this.closed || typeof this.fd !== 'number') {
Eif (typeof this.fd !== 'number') {
this.once('open', close);
return;
}
return process.nextTick(this.emit.bind(this, 'close'));
}
this.closed = true;
close();
function close(fd) {
fs.close(fd || self.fd, function(er) {
Iif (er)
self.emit('error', er);
else
self.emit('close');
});
self.fd = null;
}
};
fs.createWriteStream = function(path, options) {
return new WriteStream(path, options);
};
util.inherits(WriteStream, Writable);
fs.WriteStream = WriteStream;
function WriteStream(path, options) {
if (!(this instanceof WriteStream))
return new WriteStream(path, options);
options = options || {};
Writable.call(this, options);
this.path = path;
this.fd = options.fd === undefined ? null : options.fd;
this.flags = options.flags === undefined ? 'w' : options.flags;
this.mode = options.mode === undefined ? 0o666 : options.mode;
this.start = options.start === undefined ? undefined : options.start;
this.pos = undefined;
this.bytesWritten = 0;
if (this.start !== undefined) {
if (typeof this.start !== 'number') {
throw new TypeError('start must be a Number');
}
if (this.start < 0) {
throw new Error('start must be >= zero');
}
this.pos = this.start;
}
Eif (typeof this.fd !== 'number')
this.open();
// dispose on finish.
this.once('finish', this.close);
}
fs.FileWriteStream = fs.WriteStream; // support the legacy name
WriteStream.prototype.open = function() {
fs.open(this.path, this.flags, this.mode, function(er, fd) {
Iif (er) {
this.destroy();
this.emit('error', er);
return;
}
this.fd = fd;
this.emit('open', fd);
}.bind(this));
};
WriteStream.prototype._write = function(data, encoding, cb) {
Iif (!(data instanceof Buffer))
return this.emit('error', new Error('Invalid data'));
if (typeof this.fd !== 'number')
return this.once('open', function() {
this._write(data, encoding, cb);
});
var self = this;
fs.write(this.fd, data, 0, data.length, this.pos, function(er, bytes) {
if (er) {
self.destroy();
return cb(er);
}
self.bytesWritten += bytes;
cb();
});
if (this.pos !== undefined)
this.pos += data.length;
};
WriteStream.prototype.destroy = ReadStream.prototype.destroy;
WriteStream.prototype.close = ReadStream.prototype.close;
// There is no shutdown() for files.
WriteStream.prototype.destroySoon = WriteStream.prototype.end;
// SyncWriteStream is internal. DO NOT USE.
// Temporary hack for process.stdout and process.stderr when piped to files.
function SyncWriteStream(fd, options) {
Stream.call(this);
options = options || {};
this.fd = fd;
this.writable = true;
this.readable = false;
this.autoClose = options.autoClose === undefined ? true : options.autoClose;
}
util.inherits(SyncWriteStream, Stream);
// Export
fs.SyncWriteStream = SyncWriteStream;
SyncWriteStream.prototype.write = function(data, arg1, arg2) {
var encoding, cb;
// parse arguments
Iif (arg1) {
if (typeof arg1 === 'string') {
encoding = arg1;
cb = arg2;
} else if (typeof arg1 === 'function') {
cb = arg1;
} else {
throw new Error('bad arg');
}
}
assertEncoding(encoding);
// Change strings to buffers. SLOW
if (typeof data === 'string') {
data = new Buffer(data, encoding);
}
fs.writeSync(this.fd, data, 0, data.length);
Iif (cb) {
process.nextTick(cb);
}
return true;
};
SyncWriteStream.prototype.end = function(data, arg1, arg2) {
Iif (data) {
this.write(data, arg1, arg2);
}
this.destroy();
};
SyncWriteStream.prototype.destroy = function() {
if (this.autoClose)
fs.closeSync(this.fd);
this.fd = null;
this.emit('close');
return true;
};
SyncWriteStream.prototype.destroySoon = SyncWriteStream.prototype.destroy;
}());
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