mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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323 lines
9.3 KiB
JavaScript
323 lines
9.3 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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* This module defines the thread-agnostic components of the Unix version
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* of OS.File. It depends on the thread-agnostic cross-platform components
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* of OS.File.
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*
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* It serves the following purposes:
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* - open libc;
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* - define OS.Unix.Error;
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* - define a few constants and types that need to be defined on all platforms.
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*
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* This module can be:
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* - opened from the main thread as a jsm module;
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* - opened from a chrome worker through importScripts.
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*/
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if (typeof Components != "undefined") {
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// Module is opened as a jsm module
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this.EXPORTED_SYMBOLS = ["OS"];
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Components.utils.import("resource://gre/modules/ctypes.jsm");
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Components.utils.import("resource://gre/modules/osfile/osfile_shared_allthreads.jsm", this);
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}
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(function(exports) {
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"use strict";
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if (!exports.OS || !exports.OS.Shared) {
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throw new Error("osfile_unix_allthreads.jsm must be loaded after osfile_shared_allthreads.jsm");
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}
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if (exports.OS.Shared.Unix) {
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// Avoid double inclusion
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return;
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}
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exports.OS.Shared.Unix = {};
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let LOG = OS.Shared.LOG.bind(OS.Shared, "Unix", "allthreads");
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// Open libc
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let libc;
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let libc_candidates = [ "libSystem.B.dylib",
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"libc.so.6",
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"libc.so" ];
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for (let i = 0; i < libc_candidates.length; ++i) {
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try {
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libc = ctypes.open(libc_candidates[i]);
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break;
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} catch (x) {
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LOG("Could not open libc ", libc_candidates[i]);
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}
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}
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if (!libc) {
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// Note: If you change the string here, please adapt tests accordingly
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throw new Error("Could not open system library: no libc");
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}
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exports.OS.Shared.Unix.libc = libc;
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// Define declareFFI
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let declareFFI = OS.Shared.declareFFI.bind(null, libc);
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exports.OS.Shared.Unix.declareFFI = declareFFI;
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// Define Error
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let strerror = libc.declare("strerror",
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ctypes.default_abi,
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/*return*/ ctypes.char.ptr,
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/*errnum*/ ctypes.int);
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/**
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* A File-related error.
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*
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* To obtain a human-readable error message, use method |toString|.
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* To determine the cause of the error, use the various |becauseX|
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* getters. To determine the operation that failed, use field
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* |operation|.
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*
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* Additionally, this implementation offers a field
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* |unixErrno|, which holds the OS-specific error
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* constant. If you need this level of detail, you may match the value
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* of this field against the error constants of |OS.Constants.libc|.
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*
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* @param {string=} operation The operation that failed. If unspecified,
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* the name of the calling function is taken to be the operation that
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* failed.
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* @param {number=} lastError The OS-specific constant detailing the
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* reason of the error. If unspecified, this is fetched from the system
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* status.
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*
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* @constructor
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* @extends {OS.Shared.Error}
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*/
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let OSError = function OSError(operation, errno) {
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operation = operation || "unknown operation";
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exports.OS.Shared.Error.call(this, operation);
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this.unixErrno = errno || ctypes.errno;
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};
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OSError.prototype = new exports.OS.Shared.Error();
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OSError.prototype.toString = function toString() {
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return "Unix error " + this.unixErrno +
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" during operation " + this.operation +
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" (" + strerror(this.unixErrno).readString() + ")";
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};
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/**
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* |true| if the error was raised because a file or directory
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* already exists, |false| otherwise.
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*/
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Object.defineProperty(OSError.prototype, "becauseExists", {
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get: function becauseExists() {
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return this.unixErrno == OS.Constants.libc.EEXIST;
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}
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});
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/**
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* |true| if the error was raised because a file or directory
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* does not exist, |false| otherwise.
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*/
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Object.defineProperty(OSError.prototype, "becauseNoSuchFile", {
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get: function becauseNoSuchFile() {
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return this.unixErrno == OS.Constants.libc.ENOENT;
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}
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});
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/**
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* |true| if the error was raised because a directory is not empty
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* does not exist, |false| otherwise.
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*/
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Object.defineProperty(OSError.prototype, "becauseNotEmpty", {
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get: function becauseNotEmpty() {
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return this.unixErrno == OS.Constants.libc.ENOTEMPTY;
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}
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});
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/**
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* |true| if the error was raised because a file or directory
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* is closed, |false| otherwise.
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*/
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Object.defineProperty(OSError.prototype, "becauseClosed", {
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get: function becauseClosed() {
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return this.unixErrno == OS.Constants.libc.EBADF;
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}
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});
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/**
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* Serialize an instance of OSError to something that can be
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* transmitted across threads (not necessarily a string).
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*/
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OSError.toMsg = function toMsg(error) {
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return {
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operation: error.operation,
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unixErrno: error.unixErrno
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};
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};
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/**
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* Deserialize a message back to an instance of OSError
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*/
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OSError.fromMsg = function fromMsg(msg) {
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return new OSError(msg.operation, msg.unixErrno);
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};
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exports.OS.Shared.Unix.Error = OSError;
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/**
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* Code shared by implementations of File.Info on Unix
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*
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* @constructor
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*/
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let AbstractInfo = function AbstractInfo(isDir, isSymLink, size, lastAccessDate,
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lastModificationDate, unixLastStatusChangeDate,
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unixOwner, unixGroup, unixMode) {
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this._isDir = isDir;
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this._isSymlLink = isSymLink;
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this._size = size;
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this._lastAccessDate = lastAccessDate;
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this._lastModificationDate = lastModificationDate;
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this._unixLastStatusChangeDate = unixLastStatusChangeDate;
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this._unixOwner = unixOwner;
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this._unixGroup = unixGroup;
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this._unixMode = unixMode;
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};
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AbstractInfo.prototype = {
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/**
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* |true| if this file is a directory, |false| otherwise
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*/
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get isDir() {
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return this._isDir;
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},
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/**
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* |true| if this file is a symbolink link, |false| otherwise
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*/
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get isSymLink() {
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return this._isSymlLink;
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},
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/**
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* The size of the file, in bytes.
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*
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* Note that the result may be |NaN| if the size of the file cannot be
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* represented in JavaScript.
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*
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* @type {number}
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*/
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get size() {
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return this._size;
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},
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/**
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* The date of last access to this file.
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*
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* Note that the definition of last access may depend on the
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* underlying operating system and file system.
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*
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* @type {Date}
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*/
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get lastAccessDate() {
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return this._lastAccessDate;
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},
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/**
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* Return the date of last modification of this file.
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*/
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get lastModificationDate() {
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return this._lastModificationDate;
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},
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/**
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* Return the date at which the status of this file was last modified
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* (this is the date of the latest write/renaming/mode change/...
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* of the file)
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*/
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get unixLastStatusChangeDate() {
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return this._unixLastStatusChangeDate;
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},
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/*
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* Return the Unix owner of this file
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*/
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get unixOwner() {
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return this._unixOwner;
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},
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/*
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* Return the Unix group of this file
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*/
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get unixGroup() {
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return this._unixGroup;
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},
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/*
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* Return the Unix group of this file
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*/
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get unixMode() {
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return this._unixMode;
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}
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};
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exports.OS.Shared.Unix.AbstractInfo = AbstractInfo;
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/**
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* Code shared by implementations of File.DirectoryIterator.Entry on Unix
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*
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* @constructor
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*/
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let AbstractEntry = function AbstractEntry(isDir, isSymLink, name, path) {
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this._isDir = isDir;
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this._isSymlLink = isSymLink;
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this._name = name;
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this._path = path;
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};
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AbstractEntry.prototype = {
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/**
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* |true| if the entry is a directory, |false| otherwise
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*/
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get isDir() {
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return this._isDir;
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},
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/**
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* |true| if the entry is a directory, |false| otherwise
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*/
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get isSymLink() {
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return this._isSymlLink;
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},
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/**
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* The name of the entry
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* @type {string}
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*/
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get name() {
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return this._name;
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},
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/**
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* The full path to the entry
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*/
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get path() {
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return this._path;
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}
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};
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exports.OS.Shared.Unix.AbstractEntry = AbstractEntry;
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// Special constants that need to be defined on all platforms
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Object.defineProperty(exports.OS.Shared, "POS_START", { value: exports.OS.Constants.libc.SEEK_SET });
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Object.defineProperty(exports.OS.Shared, "POS_CURRENT", { value: exports.OS.Constants.libc.SEEK_CUR });
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Object.defineProperty(exports.OS.Shared, "POS_END", { value: exports.OS.Constants.libc.SEEK_END });
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// Special types that need to be defined for communication
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// between threads
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let Types = exports.OS.Shared.Type;
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/**
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* Native paths
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*
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* Under Unix, expressed as C strings
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*/
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Types.path = Types.cstring.withName("[in] path");
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Types.out_path = Types.out_cstring.withName("[out] path");
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// Special constructors that need to be defined on all threads
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OSError.closed = function closed(operation) {
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return new OSError(operation, OS.Constants.libc.EBADF);
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};
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OSError.exists = function exists(operation) {
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return new OSError(operation, OS.Constants.libc.EEXIST);
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};
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OSError.noSuchFile = function noSuchFile(operation) {
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return new OSError(operation, OS.Constants.libc.ENOENT);
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};
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})(this);
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