mirror of
https://github.com/classilla/tenfourfox.git
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1239 lines
48 KiB
JavaScript
1239 lines
48 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* Synchronous front-end for the JavaScript OS.File library.
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* Windows implementation.
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*
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* This front-end is meant to be imported by a worker thread.
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*/
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{
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if (typeof Components != "undefined") {
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// We do not wish osfile_win_front.jsm to be used directly as a main thread
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// module yet.
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throw new Error("osfile_win_front.jsm cannot be used from the main thread yet");
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}
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(function(exports) {
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"use strict";
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// exports.OS.Win is created by osfile_win_back.jsm
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if (exports.OS && exports.OS.File) {
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return; // Avoid double-initialization
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}
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let SharedAll = require("resource://gre/modules/osfile/osfile_shared_allthreads.jsm");
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let Path = require("resource://gre/modules/osfile/ospath.jsm");
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let SysAll = require("resource://gre/modules/osfile/osfile_win_allthreads.jsm");
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exports.OS.Win.File._init();
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let Const = exports.OS.Constants.Win;
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let WinFile = exports.OS.Win.File;
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let Type = WinFile.Type;
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// Mutable thread-global data
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// In the Windows implementation, methods |read| and |write|
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// require passing a pointer to an uint32 to determine how many
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// bytes have been read/written. In C, this is a benigne operation,
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// but in js-ctypes, this has a cost. Rather than re-allocating a
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// C uint32 and a C uint32* for each |read|/|write|, we take advantage
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// of the fact that the state is thread-private -- hence that two
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// |read|/|write| operations cannot take place at the same time --
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// and we use the following global mutable values:
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let gBytesRead = new ctypes.uint32_t(0);
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let gBytesReadPtr = gBytesRead.address();
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let gBytesWritten = new ctypes.uint32_t(0);
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let gBytesWrittenPtr = gBytesWritten.address();
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// Same story for GetFileInformationByHandle
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let gFileInfo = new Type.FILE_INFORMATION.implementation();
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let gFileInfoPtr = gFileInfo.address();
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/**
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* Representation of a file.
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*
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* You generally do not need to call this constructor yourself. Rather,
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* to open a file, use function |OS.File.open|.
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*
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* @param fd A OS-specific file descriptor.
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* @param {string} path File path of the file handle, used for error-reporting.
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* @constructor
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*/
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let File = function File(fd, path) {
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exports.OS.Shared.AbstractFile.call(this, fd, path);
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this._closeResult = null;
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};
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File.prototype = Object.create(exports.OS.Shared.AbstractFile.prototype);
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/**
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* Close the file.
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*
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* This method has no effect if the file is already closed. However,
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* if the first call to |close| has thrown an error, further calls
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* will throw the same error.
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*
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* @throws File.Error If closing the file revealed an error that could
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* not be reported earlier.
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*/
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File.prototype.close = function close() {
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if (this._fd) {
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let fd = this._fd;
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this._fd = null;
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// Call |close(fd)|, detach finalizer if any
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// (|fd| may not be a CDataFinalizer if it has been
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// instantiated from a controller thread).
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let result = WinFile._CloseHandle(fd);
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if (typeof fd == "object" && "forget" in fd) {
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fd.forget();
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}
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if (result == -1) {
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this._closeResult = new File.Error("close", ctypes.winLastError, this._path);
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}
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}
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if (this._closeResult) {
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throw this._closeResult;
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}
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return;
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};
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/**
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* Read some bytes from a file.
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*
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* @param {C pointer} buffer A buffer for holding the data
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* once it is read.
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* @param {number} nbytes The number of bytes to read. It must not
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* exceed the size of |buffer| in bytes but it may exceed the number
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* of bytes unread in the file.
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* @param {*=} options Additional options for reading. Ignored in
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* this implementation.
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*
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* @return {number} The number of bytes effectively read. If zero,
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* the end of the file has been reached.
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* @throws {OS.File.Error} In case of I/O error.
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*/
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File.prototype._read = function _read(buffer, nbytes, options) {
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// |gBytesReadPtr| is a pointer to |gBytesRead|.
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throw_on_zero("read",
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WinFile.ReadFile(this.fd, buffer, nbytes, gBytesReadPtr, null),
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this._path
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);
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return gBytesRead.value;
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};
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/**
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* Write some bytes to a file.
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*
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* @param {Typed array} buffer A buffer holding the data that must be
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* written.
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* @param {number} nbytes The number of bytes to write. It must not
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* exceed the size of |buffer| in bytes.
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* @param {*=} options Additional options for writing. Ignored in
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* this implementation.
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*
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* @return {number} The number of bytes effectively written.
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* @throws {OS.File.Error} In case of I/O error.
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*/
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File.prototype._write = function _write(buffer, nbytes, options) {
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if (this._appendMode) {
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// Need to manually seek on Windows, as O_APPEND is not supported.
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// This is, of course, a race, but there is no real way around this.
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this.setPosition(0, File.POS_END);
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}
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// |gBytesWrittenPtr| is a pointer to |gBytesWritten|.
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throw_on_zero("write",
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WinFile.WriteFile(this.fd, buffer, nbytes, gBytesWrittenPtr, null),
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this._path
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);
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return gBytesWritten.value;
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};
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/**
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* Return the current position in the file.
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*/
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File.prototype.getPosition = function getPosition(pos) {
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return this.setPosition(0, File.POS_CURRENT);
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};
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/**
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* Change the current position in the file.
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*
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* @param {number} pos The new position. Whether this position
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* is considered from the current position, from the start of
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* the file or from the end of the file is determined by
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* argument |whence|. Note that |pos| may exceed the length of
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* the file.
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* @param {number=} whence The reference position. If omitted
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* or |OS.File.POS_START|, |pos| is relative to the start of the
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* file. If |OS.File.POS_CURRENT|, |pos| is relative to the
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* current position in the file. If |OS.File.POS_END|, |pos| is
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* relative to the end of the file.
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*
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* @return The new position in the file.
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*/
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File.prototype.setPosition = function setPosition(pos, whence) {
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if (whence === undefined) {
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whence = Const.FILE_BEGIN;
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}
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let pos64 = ctypes.Int64(pos);
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// Per MSDN, while |lDistanceToMove| (low) is declared as int32_t, when
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// providing |lDistanceToMoveHigh| as well, it should countain the
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// bottom 32 bits of the 64-bit integer. Hence the following |posLo|
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// cast is OK.
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let posLo = new ctypes.uint32_t(ctypes.Int64.lo(pos64));
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posLo = ctypes.cast(posLo, ctypes.int32_t);
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let posHi = new ctypes.int32_t(ctypes.Int64.hi(pos64));
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let result = WinFile.SetFilePointer(
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this.fd, posLo.value, posHi.address(), whence);
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// INVALID_SET_FILE_POINTER might be still a valid result, as it
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// represents the lower 32 bit of the int64 result. MSDN says to check
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// both, INVALID_SET_FILE_POINTER and a non-zero winLastError.
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if (result == Const.INVALID_SET_FILE_POINTER && ctypes.winLastError) {
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throw new File.Error("setPosition", ctypes.winLastError, this._path);
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}
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pos64 = ctypes.Int64.join(posHi.value, result);
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return Type.int64_t.project(pos64);
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};
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/**
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* Fetch the information on the file.
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*
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* @return File.Info The information on |this| file.
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*/
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File.prototype.stat = function stat() {
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throw_on_zero("stat",
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WinFile.GetFileInformationByHandle(this.fd, gFileInfoPtr),
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this._path);
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return new File.Info(gFileInfo, this._path);
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};
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/**
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* Set the last access and modification date of the file.
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* The time stamp resolution is 1 second at best, but might be worse
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* depending on the platform.
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*
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* @param {Date,number=} accessDate The last access date. If numeric,
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* milliseconds since epoch. If omitted or null, then the current date
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* will be used.
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* @param {Date,number=} modificationDate The last modification date. If
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* numeric, milliseconds since epoch. If omitted or null, then the current
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* date will be used.
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*
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* @throws {TypeError} In case of invalid parameters.
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* @throws {OS.File.Error} In case of I/O error.
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*/
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File.prototype.setDates = function setDates(accessDate, modificationDate) {
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accessDate = Date_to_FILETIME("File.prototype.setDates", accessDate, this._path);
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modificationDate = Date_to_FILETIME("File.prototype.setDates",
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modificationDate,
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this._path);
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throw_on_zero("setDates",
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WinFile.SetFileTime(this.fd, null, accessDate.address(),
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modificationDate.address()),
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this._path);
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};
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/**
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* Set the file's access permission bits.
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*/
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File.prototype.setPermissions = function setPermissions(options = {}) {
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if (!("winAttributes" in options)) {
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return;
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}
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let oldAttributes = WinFile.GetFileAttributes(this._path);
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if (oldAttributes == Const.INVALID_FILE_ATTRIBUTES) {
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throw new File.Error("setPermissions", ctypes.winLastError, this._path);
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}
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let newAttributes = toFileAttributes(options.winAttributes, oldAttributes);
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throw_on_zero("setPermissions",
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WinFile.SetFileAttributes(this._path, newAttributes),
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this._path);
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};
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/**
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* Flushes the file's buffers and causes all buffered data
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* to be written.
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* Disk flushes are very expensive and therefore should be used carefully,
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* sparingly and only in scenarios where it is vital that data survives
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* system crashes. Even though the function will be executed off the
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* main-thread, it might still affect the overall performance of any
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* running application.
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*
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* @throws {OS.File.Error} In case of I/O error.
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*/
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File.prototype.flush = function flush() {
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throw_on_zero("flush", WinFile.FlushFileBuffers(this.fd), this._path);
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};
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// The default sharing mode for opening files: files are not
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// locked against being reopened for reading/writing or against
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// being deleted by the same process or another process.
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// This is consistent with the default Unix policy.
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const DEFAULT_SHARE = Const.FILE_SHARE_READ |
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Const.FILE_SHARE_WRITE | Const.FILE_SHARE_DELETE;
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// The default flags for opening files.
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const DEFAULT_FLAGS = Const.FILE_ATTRIBUTE_NORMAL;
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/**
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* Open a file
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*
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* @param {string} path The path to the file.
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* @param {*=} mode The opening mode for the file, as
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* an object that may contain the following fields:
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*
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* - {bool} truncate If |true|, the file will be opened
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* for writing. If the file does not exist, it will be
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* created. If the file exists, its contents will be
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* erased. Cannot be specified with |create|.
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* - {bool} create If |true|, the file will be opened
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* for writing. If the file exists, this function fails.
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* If the file does not exist, it will be created. Cannot
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* be specified with |truncate| or |existing|.
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* - {bool} existing. If the file does not exist, this function
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* fails. Cannot be specified with |create|.
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* - {bool} read If |true|, the file will be opened for
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* reading. The file may also be opened for writing, depending
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* on the other fields of |mode|.
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* - {bool} write If |true|, the file will be opened for
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* writing. The file may also be opened for reading, depending
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* on the other fields of |mode|.
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* - {bool} append If |true|, the file will be opened for appending,
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* meaning the equivalent of |.setPosition(0, POS_END)| is executed
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* before each write. The default is |true|, i.e. opening a file for
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* appending. Specify |append: false| to open the file in regular mode.
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*
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* If neither |truncate|, |create| or |write| is specified, the file
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* is opened for reading.
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*
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* Note that |false|, |null| or |undefined| flags are simply ignored.
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*
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* @param {*=} options Additional options for file opening. This
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* implementation interprets the following fields:
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*
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* - {number} winShare If specified, a share mode, as per
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* Windows function |CreateFile|. You can build it from
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* constants |OS.Constants.Win.FILE_SHARE_*|. If unspecified,
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* the file uses the default sharing policy: it can be opened
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* for reading and/or writing and it can be removed by other
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* processes and by the same process.
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* - {number} winSecurity If specified, Windows security
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* attributes, as per Windows function |CreateFile|. If unspecified,
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* no security attributes.
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* - {number} winAccess If specified, Windows access mode, as
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* per Windows function |CreateFile|. This also requires option
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* |winDisposition| and this replaces argument |mode|. If unspecified,
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* uses the string |mode|.
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* - {number} winDisposition If specified, Windows disposition mode,
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* as per Windows function |CreateFile|. This also requires option
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* |winAccess| and this replaces argument |mode|. If unspecified,
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* uses the string |mode|.
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*
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* @return {File} A file object.
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* @throws {OS.File.Error} If the file could not be opened.
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*/
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File.open = function Win_open(path, mode = {}, options = {}) {
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let share = options.winShare !== undefined ? options.winShare : DEFAULT_SHARE;
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let security = options.winSecurity || null;
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let flags = options.winFlags !== undefined ? options.winFlags : DEFAULT_FLAGS;
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let template = options.winTemplate ? options.winTemplate._fd : null;
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let access;
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let disposition;
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mode = OS.Shared.AbstractFile.normalizeOpenMode(mode);
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if ("winAccess" in options && "winDisposition" in options) {
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access = options.winAccess;
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disposition = options.winDisposition;
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} else if (("winAccess" in options && !("winDisposition" in options))
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||(!("winAccess" in options) && "winDisposition" in options)) {
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throw new TypeError("OS.File.open requires either both options " +
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"winAccess and winDisposition or neither");
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} else {
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if (mode.read) {
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access |= Const.GENERIC_READ;
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}
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if (mode.write) {
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access |= Const.GENERIC_WRITE;
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}
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// Finally, handle create/existing/trunc
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if (mode.trunc) {
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if (mode.existing) {
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// It seems that Const.TRUNCATE_EXISTING is broken
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// in presence of links (source, anyone?). We need
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// to open normally, then perform truncation manually.
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disposition = Const.OPEN_EXISTING;
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} else {
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disposition = Const.CREATE_ALWAYS;
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}
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} else if (mode.create) {
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disposition = Const.CREATE_NEW;
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} else if (mode.read && !mode.write) {
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disposition = Const.OPEN_EXISTING;
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} else if (mode.existing) {
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disposition = Const.OPEN_EXISTING;
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} else {
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disposition = Const.OPEN_ALWAYS;
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}
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}
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let file = error_or_file(WinFile.CreateFile(path,
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access, share, security, disposition, flags, template), path);
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file._appendMode = !!mode.append;
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if (!(mode.trunc && mode.existing)) {
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return file;
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}
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// Now, perform manual truncation
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file.setPosition(0, File.POS_START);
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throw_on_zero("open",
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WinFile.SetEndOfFile(file.fd),
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path);
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return file;
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};
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/**
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* Checks if a file or directory exists
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*
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* @param {string} path The path to the file.
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*
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* @return {bool} true if the file exists, false otherwise.
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*/
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File.exists = function Win_exists(path) {
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try {
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let file = File.open(path, FILE_STAT_MODE, FILE_STAT_OPTIONS);
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file.close();
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return true;
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} catch (x) {
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return false;
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}
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};
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/**
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* Remove an existing file.
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*
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* @param {string} path The name of the file.
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* @param {*=} options Additional options.
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* - {bool} ignoreAbsent If |false|, throw an error if the file does
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* not exist. |true| by default.
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*
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* @throws {OS.File.Error} In case of I/O error.
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*/
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File.remove = function remove(path, options = {}) {
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if (WinFile.DeleteFile(path)) {
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return;
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}
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if (ctypes.winLastError == Const.ERROR_FILE_NOT_FOUND) {
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if ((!("ignoreAbsent" in options) || options.ignoreAbsent)) {
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return;
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}
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} else if (ctypes.winLastError == Const.ERROR_ACCESS_DENIED) {
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// Save winLastError before another ctypes call.
|
|
let lastError = ctypes.winLastError;
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let attributes = WinFile.GetFileAttributes(path);
|
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if (attributes != Const.INVALID_FILE_ATTRIBUTES) {
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if (!(attributes & Const.FILE_ATTRIBUTE_READONLY)) {
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throw new File.Error("remove", lastError, path);
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}
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let newAttributes = attributes & ~Const.FILE_ATTRIBUTE_READONLY;
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if (WinFile.SetFileAttributes(path, newAttributes) &&
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WinFile.DeleteFile(path)) {
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return;
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}
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}
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}
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throw new File.Error("remove", ctypes.winLastError, path);
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};
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/**
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* Remove an empty directory.
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|
*
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* @param {string} path The name of the directory to remove.
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* @param {*=} options Additional options.
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* - {bool} ignoreAbsent If |false|, throw an error if the directory
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* does not exist. |true| by default
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*/
|
|
File.removeEmptyDir = function removeEmptyDir(path, options = {}) {
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let result = WinFile.RemoveDirectory(path);
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if (!result) {
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if ((!("ignoreAbsent" in options) || options.ignoreAbsent) &&
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ctypes.winLastError == Const.ERROR_FILE_NOT_FOUND) {
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return;
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}
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throw new File.Error("removeEmptyDir", ctypes.winLastError, path);
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}
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};
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|
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/**
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|
* Create a directory and, optionally, its parent directories.
|
|
*
|
|
* @param {string} path The name of the directory.
|
|
* @param {*=} options Additional options. This
|
|
* implementation interprets the following fields:
|
|
*
|
|
* - {C pointer} winSecurity If specified, security attributes
|
|
* as per winapi function |CreateDirectory|. If unspecified,
|
|
* use the default security descriptor, inherited from the
|
|
* parent directory.
|
|
* - {bool} ignoreExisting If |false|, throw an error if the directory
|
|
* already exists. |true| by default
|
|
* - {string} from If specified, the call to |makeDir| creates all the
|
|
* ancestors of |path| that are descendants of |from|. Note that |from|
|
|
* and its existing descendants must be user-writeable and that |path|
|
|
* must be a descendant of |from|.
|
|
* Example:
|
|
* makeDir(Path.join(profileDir, "foo", "bar"), { from: profileDir });
|
|
* creates directories profileDir/foo, profileDir/foo/bar
|
|
*/
|
|
File._makeDir = function makeDir(path, options = {}) {
|
|
let security = options.winSecurity || null;
|
|
let result = WinFile.CreateDirectory(path, security);
|
|
|
|
if (result) {
|
|
return;
|
|
}
|
|
|
|
if (("ignoreExisting" in options) && !options.ignoreExisting) {
|
|
throw new File.Error("makeDir", ctypes.winLastError, path);
|
|
}
|
|
|
|
if (ctypes.winLastError == Const.ERROR_ALREADY_EXISTS) {
|
|
return;
|
|
}
|
|
|
|
// If the user has no access, but it's a root directory, no error should be thrown
|
|
let splitPath = OS.Path.split(path);
|
|
// Removing last component if it's empty
|
|
// An empty last component is caused by trailing slashes in path
|
|
// This is always the case with root directories
|
|
if( splitPath.components[splitPath.components.length - 1].length === 0 ) {
|
|
splitPath.components.pop();
|
|
}
|
|
// One component consisting of a drive letter implies a directory root.
|
|
if (ctypes.winLastError == Const.ERROR_ACCESS_DENIED &&
|
|
splitPath.winDrive &&
|
|
splitPath.components.length === 1 ) {
|
|
return;
|
|
}
|
|
|
|
throw new File.Error("makeDir", ctypes.winLastError, path);
|
|
};
|
|
|
|
/**
|
|
* Copy a file to a destination.
|
|
*
|
|
* @param {string} sourcePath The platform-specific path at which
|
|
* the file may currently be found.
|
|
* @param {string} destPath The platform-specific path at which the
|
|
* file should be copied.
|
|
* @param {*=} options An object which may contain the following fields:
|
|
*
|
|
* @option {bool} noOverwrite - If true, this function will fail if
|
|
* a file already exists at |destPath|. Otherwise, if this file exists,
|
|
* it will be erased silently.
|
|
*
|
|
* @throws {OS.File.Error} In case of any error.
|
|
*
|
|
* General note: The behavior of this function is defined only when
|
|
* it is called on a single file. If it is called on a directory, the
|
|
* behavior is undefined and may not be the same across all platforms.
|
|
*
|
|
* General note: The behavior of this function with respect to metadata
|
|
* is unspecified. Metadata may or may not be copied with the file. The
|
|
* behavior may not be the same across all platforms.
|
|
*/
|
|
File.copy = function copy(sourcePath, destPath, options = {}) {
|
|
throw_on_zero("copy",
|
|
WinFile.CopyFile(sourcePath, destPath, options.noOverwrite || false),
|
|
sourcePath
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Move a file to a destination.
|
|
*
|
|
* @param {string} sourcePath The platform-specific path at which
|
|
* the file may currently be found.
|
|
* @param {string} destPath The platform-specific path at which the
|
|
* file should be moved.
|
|
* @param {*=} options An object which may contain the following fields:
|
|
*
|
|
* @option {bool} noOverwrite - If set, this function will fail if
|
|
* a file already exists at |destPath|. Otherwise, if this file exists,
|
|
* it will be erased silently.
|
|
* @option {bool} noCopy - If set, this function will fail if the
|
|
* operation is more sophisticated than a simple renaming, i.e. if
|
|
* |sourcePath| and |destPath| are not situated on the same drive.
|
|
*
|
|
* @throws {OS.File.Error} In case of any error.
|
|
*
|
|
* General note: The behavior of this function is defined only when
|
|
* it is called on a single file. If it is called on a directory, the
|
|
* behavior is undefined and may not be the same across all platforms.
|
|
*
|
|
* General note: The behavior of this function with respect to metadata
|
|
* is unspecified. Metadata may or may not be moved with the file. The
|
|
* behavior may not be the same across all platforms.
|
|
*/
|
|
File.move = function move(sourcePath, destPath, options = {}) {
|
|
let flags = 0;
|
|
if (!options.noCopy) {
|
|
flags = Const.MOVEFILE_COPY_ALLOWED;
|
|
}
|
|
if (!options.noOverwrite) {
|
|
flags = flags | Const.MOVEFILE_REPLACE_EXISTING;
|
|
}
|
|
throw_on_zero("move",
|
|
WinFile.MoveFileEx(sourcePath, destPath, flags),
|
|
sourcePath
|
|
);
|
|
|
|
// Inherit NTFS permissions from the destination directory
|
|
// if possible.
|
|
if (Path.dirname(sourcePath) === Path.dirname(destPath)) {
|
|
// Skip if the move operation was the simple rename,
|
|
return;
|
|
}
|
|
// The function may fail for various reasons (e.g. not all
|
|
// filesystems support NTFS permissions or the user may not
|
|
// have the enough rights to read/write permissions).
|
|
// However we can safely ignore errors. The file was already
|
|
// moved. Setting permissions is not mandatory.
|
|
let dacl = new ctypes.voidptr_t();
|
|
let sd = new ctypes.voidptr_t();
|
|
WinFile.GetNamedSecurityInfo(destPath, Const.SE_FILE_OBJECT,
|
|
Const.DACL_SECURITY_INFORMATION,
|
|
null /*sidOwner*/, null /*sidGroup*/,
|
|
dacl.address(), null /*sacl*/,
|
|
sd.address());
|
|
// dacl will be set only if the function succeeds.
|
|
if (!dacl.isNull()) {
|
|
WinFile.SetNamedSecurityInfo(destPath, Const.SE_FILE_OBJECT,
|
|
Const.DACL_SECURITY_INFORMATION |
|
|
Const.UNPROTECTED_DACL_SECURITY_INFORMATION,
|
|
null /*sidOwner*/, null /*sidGroup*/,
|
|
dacl, null /*sacl*/);
|
|
}
|
|
// sd will be set only if the function succeeds.
|
|
if (!sd.isNull()) {
|
|
WinFile.LocalFree(Type.HLOCAL.cast(sd));
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Gets the number of bytes available on disk to the current user.
|
|
*
|
|
* @param {string} sourcePath Platform-specific path to a directory on
|
|
* the disk to query for free available bytes.
|
|
*
|
|
* @return {number} The number of bytes available for the current user.
|
|
* @throws {OS.File.Error} In case of any error.
|
|
*/
|
|
File.getAvailableFreeSpace = function Win_getAvailableFreeSpace(sourcePath) {
|
|
let freeBytesAvailableToUser = new Type.uint64_t.implementation(0);
|
|
let freeBytesAvailableToUserPtr = freeBytesAvailableToUser.address();
|
|
|
|
throw_on_zero("getAvailableFreeSpace",
|
|
WinFile.GetDiskFreeSpaceEx(sourcePath, freeBytesAvailableToUserPtr, null, null)
|
|
);
|
|
|
|
return freeBytesAvailableToUser.value;
|
|
};
|
|
|
|
/**
|
|
* A global value used to receive data during time conversions.
|
|
*/
|
|
let gSystemTime = new Type.SystemTime.implementation();
|
|
let gSystemTimePtr = gSystemTime.address();
|
|
|
|
/**
|
|
* Utility function: convert a FILETIME to a JavaScript Date.
|
|
*/
|
|
let FILETIME_to_Date = function FILETIME_to_Date(fileTime, path) {
|
|
if (fileTime == null) {
|
|
throw new TypeError("Expecting a non-null filetime");
|
|
}
|
|
throw_on_zero("FILETIME_to_Date",
|
|
WinFile.FileTimeToSystemTime(fileTime.address(),
|
|
gSystemTimePtr),
|
|
path);
|
|
// Windows counts hours, minutes, seconds from UTC,
|
|
// JS counts from local time, so we need to go through UTC.
|
|
let utc = Date.UTC(gSystemTime.wYear,
|
|
gSystemTime.wMonth - 1
|
|
/*Windows counts months from 1, JS from 0*/,
|
|
gSystemTime.wDay, gSystemTime.wHour,
|
|
gSystemTime.wMinute, gSystemTime.wSecond,
|
|
gSystemTime.wMilliSeconds);
|
|
return new Date(utc);
|
|
};
|
|
|
|
/**
|
|
* Utility function: convert Javascript Date to FileTime.
|
|
*
|
|
* @param {string} fn Name of the calling function.
|
|
* @param {Date,number} date The date to be converted. If omitted or null,
|
|
* then the current date will be used. If numeric, assumed to be the date
|
|
* in milliseconds since epoch.
|
|
*/
|
|
let Date_to_FILETIME = function Date_to_FILETIME(fn, date, path) {
|
|
if (typeof date === "number") {
|
|
date = new Date(date);
|
|
} else if (!date) {
|
|
date = new Date();
|
|
} else if (typeof date.getUTCFullYear !== "function") {
|
|
throw new TypeError("|date| parameter of " + fn + " must be a " +
|
|
"|Date| instance or number");
|
|
}
|
|
gSystemTime.wYear = date.getUTCFullYear();
|
|
// Windows counts months from 1, JS from 0.
|
|
gSystemTime.wMonth = date.getUTCMonth() + 1;
|
|
gSystemTime.wDay = date.getUTCDate();
|
|
gSystemTime.wHour = date.getUTCHours();
|
|
gSystemTime.wMinute = date.getUTCMinutes();
|
|
gSystemTime.wSecond = date.getUTCSeconds();
|
|
gSystemTime.wMilliseconds = date.getUTCMilliseconds();
|
|
let result = new OS.Shared.Type.FILETIME.implementation();
|
|
throw_on_zero("Date_to_FILETIME",
|
|
WinFile.SystemTimeToFileTime(gSystemTimePtr,
|
|
result.address()),
|
|
path);
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Iterate on one directory.
|
|
*
|
|
* This iterator will not enter subdirectories.
|
|
*
|
|
* @param {string} path The directory upon which to iterate.
|
|
* @param {*=} options An object that may contain the following field:
|
|
* @option {string} winPattern Windows file name pattern; if set,
|
|
* only files matching this pattern are returned.
|
|
*
|
|
* @throws {File.Error} If |path| does not represent a directory or
|
|
* if the directory cannot be iterated.
|
|
* @constructor
|
|
*/
|
|
File.DirectoryIterator = function DirectoryIterator(path, options) {
|
|
exports.OS.Shared.AbstractFile.AbstractIterator.call(this);
|
|
if (options && options.winPattern) {
|
|
this._pattern = path + "\\" + options.winPattern;
|
|
} else {
|
|
this._pattern = path + "\\*";
|
|
}
|
|
this._path = path;
|
|
|
|
// Pre-open the first item.
|
|
this._first = true;
|
|
this._findData = new Type.FindData.implementation();
|
|
this._findDataPtr = this._findData.address();
|
|
this._handle = WinFile.FindFirstFile(this._pattern, this._findDataPtr);
|
|
if (this._handle == Const.INVALID_HANDLE_VALUE) {
|
|
let error = ctypes.winLastError;
|
|
this._findData = null;
|
|
this._findDataPtr = null;
|
|
if (error == Const.ERROR_FILE_NOT_FOUND) {
|
|
// Directory is empty, let's behave as if it were closed
|
|
SharedAll.LOG("Directory is empty");
|
|
this._closed = true;
|
|
this._exists = true;
|
|
} else if (error == Const.ERROR_PATH_NOT_FOUND) {
|
|
// Directory does not exist, let's throw if we attempt to walk it
|
|
SharedAll.LOG("Directory does not exist");
|
|
this._closed = true;
|
|
this._exists = false;
|
|
} else {
|
|
throw new File.Error("DirectoryIterator", error, this._path);
|
|
}
|
|
} else {
|
|
this._closed = false;
|
|
this._exists = true;
|
|
}
|
|
};
|
|
|
|
File.DirectoryIterator.prototype = Object.create(exports.OS.Shared.AbstractFile.AbstractIterator.prototype);
|
|
|
|
|
|
/**
|
|
* Fetch the next entry in the directory.
|
|
*
|
|
* @return null If we have reached the end of the directory.
|
|
*/
|
|
File.DirectoryIterator.prototype._next = function _next() {
|
|
// Bailout if the directory does not exist
|
|
if (!this._exists) {
|
|
throw File.Error.noSuchFile("DirectoryIterator.prototype.next", this._path);
|
|
}
|
|
// Bailout if the iterator is closed.
|
|
if (this._closed) {
|
|
return null;
|
|
}
|
|
// If this is the first entry, we have obtained it already
|
|
// during construction.
|
|
if (this._first) {
|
|
this._first = false;
|
|
return this._findData;
|
|
}
|
|
|
|
if (WinFile.FindNextFile(this._handle, this._findDataPtr)) {
|
|
return this._findData;
|
|
} else {
|
|
let error = ctypes.winLastError;
|
|
this.close();
|
|
if (error == Const.ERROR_NO_MORE_FILES) {
|
|
return null;
|
|
} else {
|
|
throw new File.Error("iter (FindNextFile)", error, this._path);
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Return the next entry in the directory, if any such entry is
|
|
* available.
|
|
*
|
|
* Skip special directories "." and "..".
|
|
*
|
|
* @return {File.Entry} The next entry in the directory.
|
|
* @throws {StopIteration} Once all files in the directory have been
|
|
* encountered.
|
|
*/
|
|
File.DirectoryIterator.prototype.next = function next() {
|
|
// FIXME: If we start supporting "\\?\"-prefixed paths, do not forget
|
|
// that "." and ".." are absolutely normal file names if _path starts
|
|
// with such prefix
|
|
for (let entry = this._next(); entry != null; entry = this._next()) {
|
|
let name = entry.cFileName.readString();
|
|
if (name == "." || name == "..") {
|
|
continue;
|
|
}
|
|
return new File.DirectoryIterator.Entry(entry, this._path);
|
|
}
|
|
throw StopIteration;
|
|
};
|
|
|
|
File.DirectoryIterator.prototype.close = function close() {
|
|
if (this._closed) {
|
|
return;
|
|
}
|
|
this._closed = true;
|
|
if (this._handle) {
|
|
// We might not have a handle if the iterator is closed
|
|
// before being used.
|
|
throw_on_zero("FindClose",
|
|
WinFile.FindClose(this._handle),
|
|
this._path);
|
|
this._handle = null;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Determine whether the directory exists.
|
|
*
|
|
* @return {boolean}
|
|
*/
|
|
File.DirectoryIterator.prototype.exists = function exists() {
|
|
return this._exists;
|
|
};
|
|
|
|
File.DirectoryIterator.Entry = function Entry(win_entry, parent) {
|
|
if (!win_entry.dwFileAttributes || !win_entry.ftCreationTime ||
|
|
!win_entry.ftLastAccessTime || !win_entry.ftLastWriteTime)
|
|
throw new TypeError();
|
|
|
|
// Copy the relevant part of |win_entry| to ensure that
|
|
// our data is not overwritten prematurely.
|
|
let isDir = !!(win_entry.dwFileAttributes & Const.FILE_ATTRIBUTE_DIRECTORY);
|
|
let isSymLink = !!(win_entry.dwFileAttributes & Const.FILE_ATTRIBUTE_REPARSE_POINT);
|
|
|
|
let winCreationDate = FILETIME_to_Date(win_entry.ftCreationTime, this._path);
|
|
let winLastWriteDate = FILETIME_to_Date(win_entry.ftLastWriteTime, this._path);
|
|
let winLastAccessDate = FILETIME_to_Date(win_entry.ftLastAccessTime, this._path);
|
|
|
|
let name = win_entry.cFileName.readString();
|
|
if (!name) {
|
|
throw new TypeError("Empty name");
|
|
}
|
|
|
|
if (!parent) {
|
|
throw new TypeError("Empty parent");
|
|
}
|
|
this._parent = parent;
|
|
|
|
let path = Path.join(this._parent, name);
|
|
|
|
SysAll.AbstractEntry.call(this, isDir, isSymLink, name,
|
|
winCreationDate, winLastWriteDate,
|
|
winLastAccessDate, path);
|
|
};
|
|
File.DirectoryIterator.Entry.prototype = Object.create(SysAll.AbstractEntry.prototype);
|
|
|
|
/**
|
|
* Return a version of an instance of
|
|
* File.DirectoryIterator.Entry that can be sent from a worker
|
|
* thread to the main thread. Note that deserialization is
|
|
* asymmetric and returns an object with a different
|
|
* implementation.
|
|
*/
|
|
File.DirectoryIterator.Entry.toMsg = function toMsg(value) {
|
|
if (!value instanceof File.DirectoryIterator.Entry) {
|
|
throw new TypeError("parameter of " +
|
|
"File.DirectoryIterator.Entry.toMsg must be a " +
|
|
"File.DirectoryIterator.Entry");
|
|
}
|
|
let serialized = {};
|
|
for (let key in File.DirectoryIterator.Entry.prototype) {
|
|
serialized[key] = value[key];
|
|
}
|
|
return serialized;
|
|
};
|
|
|
|
|
|
/**
|
|
* Information on a file.
|
|
*
|
|
* To obtain the latest information on a file, use |File.stat|
|
|
* (for an unopened file) or |File.prototype.stat| (for an
|
|
* already opened file).
|
|
*
|
|
* @constructor
|
|
*/
|
|
File.Info = function Info(stat, path) {
|
|
let isDir = !!(stat.dwFileAttributes & Const.FILE_ATTRIBUTE_DIRECTORY);
|
|
let isSymLink = !!(stat.dwFileAttributes & Const.FILE_ATTRIBUTE_REPARSE_POINT);
|
|
|
|
let winBirthDate = FILETIME_to_Date(stat.ftCreationTime, this._path);
|
|
let lastAccessDate = FILETIME_to_Date(stat.ftLastAccessTime, this._path);
|
|
let lastWriteDate = FILETIME_to_Date(stat.ftLastWriteTime, this._path);
|
|
|
|
let value = ctypes.UInt64.join(stat.nFileSizeHigh, stat.nFileSizeLow);
|
|
let size = Type.uint64_t.importFromC(value);
|
|
let winAttributes = {
|
|
readOnly: !!(stat.dwFileAttributes & Const.FILE_ATTRIBUTE_READONLY),
|
|
system: !!(stat.dwFileAttributes & Const.FILE_ATTRIBUTE_SYSTEM),
|
|
hidden: !!(stat.dwFileAttributes & Const.FILE_ATTRIBUTE_HIDDEN),
|
|
};
|
|
|
|
SysAll.AbstractInfo.call(this, path, isDir, isSymLink, size,
|
|
winBirthDate, lastAccessDate, lastWriteDate, winAttributes);
|
|
};
|
|
File.Info.prototype = Object.create(SysAll.AbstractInfo.prototype);
|
|
|
|
/**
|
|
* Return a version of an instance of File.Info that can be sent
|
|
* from a worker thread to the main thread. Note that deserialization
|
|
* is asymmetric and returns an object with a different implementation.
|
|
*/
|
|
File.Info.toMsg = function toMsg(stat) {
|
|
if (!stat instanceof File.Info) {
|
|
throw new TypeError("parameter of File.Info.toMsg must be a File.Info");
|
|
}
|
|
let serialized = {};
|
|
for (let key in File.Info.prototype) {
|
|
serialized[key] = stat[key];
|
|
}
|
|
return serialized;
|
|
};
|
|
|
|
|
|
/**
|
|
* Fetch the information on a file.
|
|
*
|
|
* Performance note: if you have opened the file already,
|
|
* method |File.prototype.stat| is generally much faster
|
|
* than method |File.stat|.
|
|
*
|
|
* Platform-specific note: under Windows, if the file is
|
|
* already opened without sharing of the read capability,
|
|
* this function will fail.
|
|
*
|
|
* @return {File.Information}
|
|
*/
|
|
File.stat = function stat(path) {
|
|
let file = File.open(path, FILE_STAT_MODE, FILE_STAT_OPTIONS);
|
|
try {
|
|
return file.stat();
|
|
} finally {
|
|
file.close();
|
|
}
|
|
};
|
|
// All of the following is required to ensure that File.stat
|
|
// also works on directories.
|
|
const FILE_STAT_MODE = {
|
|
read: true
|
|
};
|
|
const FILE_STAT_OPTIONS = {
|
|
// Directories can be opened neither for reading(!) nor for writing
|
|
winAccess: 0,
|
|
// Directories can only be opened with backup semantics(!)
|
|
winFlags: Const.FILE_FLAG_BACKUP_SEMANTICS,
|
|
winDisposition: Const.OPEN_EXISTING
|
|
};
|
|
|
|
/**
|
|
* Set the file's access permission bits.
|
|
*/
|
|
File.setPermissions = function setPermissions(path, options = {}) {
|
|
if (!("winAttributes" in options)) {
|
|
return;
|
|
}
|
|
let oldAttributes = WinFile.GetFileAttributes(path);
|
|
if (oldAttributes == Const.INVALID_FILE_ATTRIBUTES) {
|
|
throw new File.Error("setPermissions", ctypes.winLastError, path);
|
|
}
|
|
let newAttributes = toFileAttributes(options.winAttributes, oldAttributes);
|
|
throw_on_zero("setPermissions",
|
|
WinFile.SetFileAttributes(path, newAttributes),
|
|
path);
|
|
};
|
|
|
|
/**
|
|
* Set the last access and modification date of the file.
|
|
* The time stamp resolution is 1 second at best, but might be worse
|
|
* depending on the platform.
|
|
*
|
|
* Performance note: if you have opened the file already in write mode,
|
|
* method |File.prototype.stat| is generally much faster
|
|
* than method |File.stat|.
|
|
*
|
|
* Platform-specific note: under Windows, if the file is
|
|
* already opened without sharing of the write capability,
|
|
* this function will fail.
|
|
*
|
|
* @param {string} path The full name of the file to set the dates for.
|
|
* @param {Date,number=} accessDate The last access date. If numeric,
|
|
* milliseconds since epoch. If omitted or null, then the current date
|
|
* will be used.
|
|
* @param {Date,number=} modificationDate The last modification date. If
|
|
* numeric, milliseconds since epoch. If omitted or null, then the current
|
|
* date will be used.
|
|
*
|
|
* @throws {TypeError} In case of invalid paramters.
|
|
* @throws {OS.File.Error} In case of I/O error.
|
|
*/
|
|
File.setDates = function setDates(path, accessDate, modificationDate) {
|
|
let file = File.open(path, FILE_SETDATES_MODE, FILE_SETDATES_OPTIONS);
|
|
try {
|
|
return file.setDates(accessDate, modificationDate);
|
|
} finally {
|
|
file.close();
|
|
}
|
|
};
|
|
// All of the following is required to ensure that File.setDates
|
|
// also works on directories.
|
|
const FILE_SETDATES_MODE = {
|
|
write: true
|
|
};
|
|
const FILE_SETDATES_OPTIONS = {
|
|
winAccess: Const.GENERIC_WRITE,
|
|
// Directories can only be opened with backup semantics(!)
|
|
winFlags: Const.FILE_FLAG_BACKUP_SEMANTICS,
|
|
winDisposition: Const.OPEN_EXISTING
|
|
};
|
|
|
|
File.read = exports.OS.Shared.AbstractFile.read;
|
|
File.writeAtomic = exports.OS.Shared.AbstractFile.writeAtomic;
|
|
File.openUnique = exports.OS.Shared.AbstractFile.openUnique;
|
|
File.makeDir = exports.OS.Shared.AbstractFile.makeDir;
|
|
|
|
/**
|
|
* Remove an existing directory and its contents.
|
|
*
|
|
* @param {string} path The name of the directory.
|
|
* @param {*=} options Additional options.
|
|
* - {bool} ignoreAbsent If |false|, throw an error if the directory doesn't
|
|
* exist. |true| by default.
|
|
* - {boolean} ignorePermissions If |true|, remove the file even when lacking write
|
|
* permission.
|
|
*
|
|
* @throws {OS.File.Error} In case of I/O error, in particular if |path| is
|
|
* not a directory.
|
|
*/
|
|
File.removeDir = function(path, options = {}) {
|
|
// We can't use File.stat here because it will follow the symlink.
|
|
let attributes = WinFile.GetFileAttributes(path);
|
|
if (attributes == Const.INVALID_FILE_ATTRIBUTES) {
|
|
if ((!("ignoreAbsent" in options) || options.ignoreAbsent) &&
|
|
ctypes.winLastError == Const.ERROR_FILE_NOT_FOUND) {
|
|
return;
|
|
}
|
|
throw new File.Error("removeEmptyDir", ctypes.winLastError, path);
|
|
}
|
|
if (attributes & Const.FILE_ATTRIBUTE_REPARSE_POINT) {
|
|
// Unlike Unix symlinks, NTFS junctions or NTFS symlinks to
|
|
// directories are directories themselves. OS.File.remove()
|
|
// will not work for them.
|
|
OS.File.removeEmptyDir(path, options);
|
|
return;
|
|
}
|
|
exports.OS.Shared.AbstractFile.removeRecursive(path, options);
|
|
};
|
|
|
|
/**
|
|
* Get the current directory by getCurrentDirectory.
|
|
*/
|
|
File.getCurrentDirectory = function getCurrentDirectory() {
|
|
// This function is more complicated than one could hope.
|
|
//
|
|
// This is due to two facts:
|
|
// - the maximal length of a path under Windows is not completely
|
|
// specified (there is a constant MAX_PATH, but it is quite possible
|
|
// to create paths that are much larger, see bug 744413);
|
|
// - if we attempt to call |GetCurrentDirectory| with a buffer that
|
|
// is too short, it returns the length of the current directory, but
|
|
// this length might be insufficient by the time we can call again
|
|
// the function with a larger buffer, in the (unlikely but possible)
|
|
// case in which the process changes directory to a directory with
|
|
// a longer name between both calls.
|
|
//
|
|
let buffer_size = 4096;
|
|
while (true) {
|
|
let array = new (ctypes.ArrayType(ctypes.char16_t, buffer_size))();
|
|
let expected_size = throw_on_zero("getCurrentDirectory",
|
|
WinFile.GetCurrentDirectory(buffer_size, array)
|
|
);
|
|
if (expected_size <= buffer_size) {
|
|
return array.readString();
|
|
}
|
|
// At this point, we are in a case in which our buffer was not
|
|
// large enough to hold the name of the current directory.
|
|
// Consequently, we need to increase the size of the buffer.
|
|
// Note that, even in crazy scenarios, the loop will eventually
|
|
// converge, as the length of the paths cannot increase infinitely.
|
|
buffer_size = expected_size + 1 /* to store \0 */;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Set the current directory by setCurrentDirectory.
|
|
*/
|
|
File.setCurrentDirectory = function setCurrentDirectory(path) {
|
|
throw_on_zero("setCurrentDirectory",
|
|
WinFile.SetCurrentDirectory(path),
|
|
path);
|
|
};
|
|
|
|
/**
|
|
* Get/set the current directory by |curDir|.
|
|
*/
|
|
Object.defineProperty(File, "curDir", {
|
|
set: function(path) {
|
|
this.setCurrentDirectory(path);
|
|
},
|
|
get: function() {
|
|
return this.getCurrentDirectory();
|
|
}
|
|
}
|
|
);
|
|
|
|
// Utility functions, used for error-handling
|
|
|
|
/**
|
|
* Turn the result of |open| into an Error or a File
|
|
* @param {number} maybe The result of the |open| operation that may
|
|
* represent either an error or a success. If -1, this function raises
|
|
* an error holding ctypes.winLastError, otherwise it returns the opened file.
|
|
* @param {string=} path The path of the file.
|
|
*/
|
|
function error_or_file(maybe, path) {
|
|
if (maybe == Const.INVALID_HANDLE_VALUE) {
|
|
throw new File.Error("open", ctypes.winLastError, path);
|
|
}
|
|
return new File(maybe, path);
|
|
}
|
|
|
|
/**
|
|
* Utility function to sort errors represented as "0" from successes.
|
|
*
|
|
* @param {string=} operation The name of the operation. If unspecified,
|
|
* the name of the caller function.
|
|
* @param {number} result The result of the operation that may
|
|
* represent either an error or a success. If 0, this function raises
|
|
* an error holding ctypes.winLastError, otherwise it returns |result|.
|
|
* @param {string=} path The path of the file.
|
|
*/
|
|
function throw_on_zero(operation, result, path) {
|
|
if (result == 0) {
|
|
throw new File.Error(operation, ctypes.winLastError, path);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Utility function to sort errors represented as "-1" from successes.
|
|
*
|
|
* @param {string=} operation The name of the operation. If unspecified,
|
|
* the name of the caller function.
|
|
* @param {number} result The result of the operation that may
|
|
* represent either an error or a success. If -1, this function raises
|
|
* an error holding ctypes.winLastError, otherwise it returns |result|.
|
|
* @param {string=} path The path of the file.
|
|
*/
|
|
function throw_on_negative(operation, result, path) {
|
|
if (result < 0) {
|
|
throw new File.Error(operation, ctypes.winLastError, path);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Utility function to sort errors represented as |null| from successes.
|
|
*
|
|
* @param {string=} operation The name of the operation. If unspecified,
|
|
* the name of the caller function.
|
|
* @param {pointer} result The result of the operation that may
|
|
* represent either an error or a success. If |null|, this function raises
|
|
* an error holding ctypes.winLastError, otherwise it returns |result|.
|
|
* @param {string=} path The path of the file.
|
|
*/
|
|
function throw_on_null(operation, result, path) {
|
|
if (result == null || (result.isNull && result.isNull())) {
|
|
throw new File.Error(operation, ctypes.winLastError, path);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Helper used by both versions of setPermissions
|
|
*/
|
|
function toFileAttributes(winAttributes, oldDwAttrs) {
|
|
if ("readOnly" in winAttributes) {
|
|
if (winAttributes.readOnly) {
|
|
oldDwAttrs |= Const.FILE_ATTRIBUTE_READONLY;
|
|
} else {
|
|
oldDwAttrs &= ~Const.FILE_ATTRIBUTE_READONLY;
|
|
}
|
|
}
|
|
if ("system" in winAttributes) {
|
|
if (winAttributes.system) {
|
|
oldDwAttrs |= Const.FILE_ATTRIBUTE_SYSTEM;
|
|
} else {
|
|
oldDwAttrs &= ~Const.FILE_ATTRIBUTE_SYSTEM;
|
|
}
|
|
}
|
|
if ("hidden" in winAttributes) {
|
|
if (winAttributes.hidden) {
|
|
oldDwAttrs |= Const.FILE_ATTRIBUTE_HIDDEN;
|
|
} else {
|
|
oldDwAttrs &= ~Const.FILE_ATTRIBUTE_HIDDEN;
|
|
}
|
|
}
|
|
return oldDwAttrs;
|
|
}
|
|
|
|
File.Win = exports.OS.Win.File;
|
|
File.Error = SysAll.Error;
|
|
exports.OS.File = File;
|
|
exports.OS.Shared.Type = Type;
|
|
|
|
Object.defineProperty(File, "POS_START", { value: SysAll.POS_START });
|
|
Object.defineProperty(File, "POS_CURRENT", { value: SysAll.POS_CURRENT });
|
|
Object.defineProperty(File, "POS_END", { value: SysAll.POS_END });
|
|
})(this);
|
|
}
|