From 87fd1465f7b7fe6af22f6de414e870c0c66944cc Mon Sep 17 00:00:00 2001 From: "David Humphrey (:humph) david.humphrey@senecacollege.ca" Date: Tue, 18 Mar 2014 14:16:39 -0400 Subject: [PATCH] Dump fs.js --- src/fs.js | 2767 ----------------------------------------------------- 1 file changed, 2767 deletions(-) delete mode 100644 src/fs.js diff --git a/src/fs.js b/src/fs.js deleted file mode 100644 index cfea5f6..0000000 --- a/src/fs.js +++ /dev/null @@ -1,2767 +0,0 @@ -define(function(require) { - - var _ = require('nodash'); - - // TextEncoder and TextDecoder will either already be present, or use this shim. - // Because of the way the spec is defined, we need to get them off the global. - require('encoding'); - - var normalize = require('src/path').normalize; - var dirname = require('src/path').dirname; - var basename = require('src/path').basename; - var isAbsolutePath = require('src/path').isAbsolute; - var isNullPath = require('src/path').isNull; - - var hash = require('src/shared').hash; - var nop = require('src/shared').nop; - - var FILE_SYSTEM_NAME = require('src/constants').FILE_SYSTEM_NAME; - var FS_FORMAT = require('src/constants').FS_FORMAT; - var MODE_FILE = require('src/constants').MODE_FILE; - var MODE_DIRECTORY = require('src/constants').MODE_DIRECTORY; - var MODE_SYMBOLIC_LINK = require('src/constants').MODE_SYMBOLIC_LINK; - var MODE_META = require('src/constants').MODE_META; - var ROOT_DIRECTORY_NAME = require('src/constants').ROOT_DIRECTORY_NAME; - var SUPER_NODE_ID = require('src/constants').SUPER_NODE_ID; - var SYMLOOP_MAX = require('src/constants').SYMLOOP_MAX; - var FS_READY = require('src/constants').FS_READY; - var FS_PENDING = require('src/constants').FS_PENDING; - var FS_ERROR = require('src/constants').FS_ERROR; - var O_READ = require('src/constants').O_READ; - var O_WRITE = require('src/constants').O_WRITE; - var O_CREATE = require('src/constants').O_CREATE; - var O_EXCLUSIVE = require('src/constants').O_EXCLUSIVE; - var O_TRUNCATE = require('src/constants').O_TRUNCATE; - var O_APPEND = require('src/constants').O_APPEND; - var O_FLAGS = require('src/constants').O_FLAGS; - var XATTR_CREATE = require('src/constants').XATTR_CREATE; - var XATTR_REPLACE = require('src/constants').XATTR_REPLACE; - var FS_NOMTIME = require('src/constants').FS_NOMTIME; - var FS_NOCTIME = require('src/constants').FS_NOCTIME; - - var providers = require('src/providers/providers'); - var adapters = require('src/adapters/adapters'); - - var Shell = require('src/shell'); - var Intercom = require('intercom'); - var FSWatcher = require('src/fs-watcher'); - var Errors = require('src/errors'); - var DirectoryEntry = require('src/directory-entry'); - var OpenFileDescription = require('src/open-file-description'); - var SuperNode = require('src/super-node'); - var Node = require('src/node'); - var Stats = require('src/stats'); - - /* - * Update node times. Only passed times are modified (undefined times are ignored) - * and filesystem flags are examined in order to override update logic. - */ - function update_node_times(context, path, node, times, callback) { - // Honour mount flags for how we update times - var flags = context.flags; - if(_(flags).contains(FS_NOCTIME)) { - delete times.ctime; - } - if(_(flags).contains(FS_NOMTIME)) { - delete times.mtime; - } - - // Only do the update if required (i.e., times are still present) - var update = false; - if(times.ctime) { - node.ctime = times.ctime; - // We don't do atime tracking for perf reasons, but do mirror ctime - node.atime = times.ctime; - update = true; - } - if(times.atime) { - // The only time we explicitly pass atime is when utimes(), futimes() is called. - // Override ctime mirror here if so - node.atime = times.atime; - update = true; - } - if(times.mtime) { - node.mtime = times.mtime; - update = true; - } - - function complete(error) { - // Queue this change so we can send watch events. - // Unlike node.js, we send the full path vs. basename/dirname only. - context.changes.push({ event: 'change', path: path }); - callback(error); - } - - if(update) { - context.put(node.id, node, complete); - } else { - complete(); - } - } - - /* - * find_node - */ - - // in: file or directory path - // out: node structure, or error - function find_node(context, path, callback) { - path = normalize(path); - if(!path) { - return callback(new Errors.ENOENT('path is an empty string')); - } - var name = basename(path); - var parentPath = dirname(path); - var followedCount = 0; - - function read_root_directory_node(error, superNode) { - if(error) { - callback(error); - } else if(!superNode || superNode.mode !== MODE_META || !superNode.rnode) { - callback(new Errors.EFILESYSTEMERROR()); - } else { - context.get(superNode.rnode, check_root_directory_node); - } - } - - function check_root_directory_node(error, rootDirectoryNode) { - if(error) { - callback(error); - } else if(!rootDirectoryNode) { - callback(new Errors.ENOENT()); - } else { - callback(null, rootDirectoryNode); - } - } - - // in: parent directory node - // out: parent directory data - function read_parent_directory_data(error, parentDirectoryNode) { - if(error) { - callback(error); - } else if(parentDirectoryNode.mode !== MODE_DIRECTORY || !parentDirectoryNode.data) { - callback(new Errors.ENOTDIR('a component of the path prefix is not a directory')); - } else { - context.get(parentDirectoryNode.data, get_node_from_parent_directory_data); - } - } - - // in: parent directory data - // out: searched node - function get_node_from_parent_directory_data(error, parentDirectoryData) { - if(error) { - callback(error); - } else { - if(!_(parentDirectoryData).has(name)) { - callback(new Errors.ENOENT()); - } else { - var nodeId = parentDirectoryData[name].id; - context.get(nodeId, is_symbolic_link); - } - } - } - - function is_symbolic_link(error, node) { - if(error) { - callback(error); - } else { - if(node.mode == MODE_SYMBOLIC_LINK) { - followedCount++; - if(followedCount > SYMLOOP_MAX){ - callback(new Errors.ELOOP()); - } else { - follow_symbolic_link(node.data); - } - } else { - callback(null, node); - } - } - } - - function follow_symbolic_link(data) { - data = normalize(data); - parentPath = dirname(data); - name = basename(data); - if(ROOT_DIRECTORY_NAME == name) { - context.get(SUPER_NODE_ID, read_root_directory_node); - } else { - find_node(context, parentPath, read_parent_directory_data); - } - } - - if(ROOT_DIRECTORY_NAME == name) { - context.get(SUPER_NODE_ID, read_root_directory_node); - } else { - find_node(context, parentPath, read_parent_directory_data); - } - } - - - /* - * set extended attribute (refactor) - */ - - function set_extended_attribute (context, path_or_fd, name, value, flag, callback) { - var path; - - function set_xattr (error, node) { - var xattr = (node ? node.xattrs[name] : null); - - function update_time(error) { - if(error) { - callback(error); - } else { - update_node_times(context, path, node, { ctime: Date.now() }, callback); - } - } - - if (error) { - callback(error); - } - else if (flag === XATTR_CREATE && node.xattrs.hasOwnProperty(name)) { - callback(new Errors.EEXIST('attribute already exists')); - } - else if (flag === XATTR_REPLACE && !node.xattrs.hasOwnProperty(name)) { - callback(new Errors.ENOATTR()); - } - else { - node.xattrs[name] = value; - context.put(node.id, node, update_time); - } - } - - if (typeof path_or_fd == 'string') { - path = path_or_fd; - find_node(context, path_or_fd, set_xattr); - } - else if (typeof path_or_fd == 'object' && typeof path_or_fd.id == 'string') { - path = path_or_fd.path; - context.get(path_or_fd.id, set_xattr); - } - else { - callback(new Errors.EINVAL('path or file descriptor of wrong type')); - } - } - - /* - * make_root_directory - */ - - // Note: this should only be invoked when formatting a new file system - function make_root_directory(context, callback) { - var superNode; - var directoryNode; - var directoryData; - - function write_super_node(error, existingNode) { - if(!error && existingNode) { - callback(new Errors.EEXIST()); - } else if(error && !(error instanceof Errors.ENOENT)) { - callback(error); - } else { - superNode = new SuperNode(); - context.put(superNode.id, superNode, write_directory_node); - } - } - - function write_directory_node(error) { - if(error) { - callback(error); - } else { - directoryNode = new Node(superNode.rnode, MODE_DIRECTORY); - directoryNode.nlinks += 1; - context.put(directoryNode.id, directoryNode, write_directory_data); - } - } - - function write_directory_data(error) { - if(error) { - callback(error); - } else { - directoryData = {}; - context.put(directoryNode.data, directoryData, callback); - } - } - - context.get(SUPER_NODE_ID, write_super_node); - } - - /* - * make_directory - */ - - function make_directory(context, path, callback) { - path = normalize(path); - var name = basename(path); - var parentPath = dirname(path); - - var directoryNode; - var directoryData; - var parentDirectoryNode; - var parentDirectoryData; - - function check_if_directory_exists(error, result) { - if(!error && result) { - callback(new Errors.EEXIST()); - } else if(error && !(error instanceof Errors.ENOENT)) { - callback(error); - } else { - find_node(context, parentPath, read_parent_directory_data); - } - } - - function read_parent_directory_data(error, result) { - if(error) { - callback(error); - } else { - parentDirectoryNode = result; - context.get(parentDirectoryNode.data, write_directory_node); - } - } - - function write_directory_node(error, result) { - if(error) { - callback(error); - } else { - parentDirectoryData = result; - directoryNode = new Node(undefined, MODE_DIRECTORY); - directoryNode.nlinks += 1; - context.put(directoryNode.id, directoryNode, write_directory_data); - } - } - - function write_directory_data(error) { - if(error) { - callback(error); - } else { - directoryData = {}; - context.put(directoryNode.data, directoryData, update_parent_directory_data); - } - } - - function update_time(error) { - if(error) { - callback(error); - } else { - var now = Date.now(); - update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, callback); - } - } - - function update_parent_directory_data(error) { - if(error) { - callback(error); - } else { - parentDirectoryData[name] = new DirectoryEntry(directoryNode.id, MODE_DIRECTORY); - context.put(parentDirectoryNode.data, parentDirectoryData, update_time); - } - } - - find_node(context, path, check_if_directory_exists); - } - - /* - * remove_directory - */ - - function remove_directory(context, path, callback) { - path = normalize(path); - var name = basename(path); - var parentPath = dirname(path); - - var directoryNode; - var directoryData; - var parentDirectoryNode; - var parentDirectoryData; - - function read_parent_directory_data(error, result) { - if(error) { - callback(error); - } else { - parentDirectoryNode = result; - context.get(parentDirectoryNode.data, check_if_node_exists); - } - } - - function check_if_node_exists(error, result) { - if(error) { - callback(error); - } else if(ROOT_DIRECTORY_NAME == name) { - callback(new Errors.EBUSY()); - } else if(!_(result).has(name)) { - callback(new Errors.ENOENT()); - } else { - parentDirectoryData = result; - directoryNode = parentDirectoryData[name].id; - context.get(directoryNode, check_if_node_is_directory); - } - } - - function check_if_node_is_directory(error, result) { - if(error) { - callback(error); - } else if(result.mode != MODE_DIRECTORY) { - callback(new Errors.ENOTDIR()); - } else { - directoryNode = result; - context.get(directoryNode.data, check_if_directory_is_empty); - } - } - - function check_if_directory_is_empty(error, result) { - if(error) { - callback(error); - } else { - directoryData = result; - if(_(directoryData).size() > 0) { - callback(new Errors.ENOTEMPTY()); - } else { - remove_directory_entry_from_parent_directory_node(); - } - } - } - - function update_time(error) { - if(error) { - callback(error); - } else { - var now = Date.now(); - update_node_times(context, parentPath, parentDirectoryNode, { mtime: now, ctime: now }, remove_directory_node); - } - } - - function remove_directory_entry_from_parent_directory_node() { - delete parentDirectoryData[name]; - context.put(parentDirectoryNode.data, parentDirectoryData, update_time); - } - - function remove_directory_node(error) { - if(error) { - callback(error); - } else { - context.delete(directoryNode.id, remove_directory_data); - } - } - - function remove_directory_data(error) { - if(error) { - callback(error); - } else { - context.delete(directoryNode.data, callback); - } - } - - find_node(context, parentPath, read_parent_directory_data); - } - - function open_file(context, path, flags, callback) { - path = normalize(path); - var name = basename(path); - var parentPath = dirname(path); - - var directoryNode; - var directoryData; - var directoryEntry; - var fileNode; - var fileData; - - var followedCount = 0; - - if(ROOT_DIRECTORY_NAME == name) { - if(_(flags).contains(O_WRITE)) { - callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set')); - } else { - find_node(context, path, set_file_node); - } - } else { - find_node(context, parentPath, read_directory_data); - } - - function read_directory_data(error, result) { - if(error) { - callback(error); - } else { - directoryNode = result; - context.get(directoryNode.data, check_if_file_exists); - } - } - - function check_if_file_exists(error, result) { - if(error) { - callback(error); - } else { - directoryData = result; - if(_(directoryData).has(name)) { - if(_(flags).contains(O_EXCLUSIVE)) { - callback(new Errors.ENOENT('O_CREATE and O_EXCLUSIVE are set, and the named file exists')); - } else { - directoryEntry = directoryData[name]; - if(directoryEntry.type == MODE_DIRECTORY && _(flags).contains(O_WRITE)) { - callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set')); - } else { - context.get(directoryEntry.id, check_if_symbolic_link); - } - } - } else { - if(!_(flags).contains(O_CREATE)) { - callback(new Errors.ENOENT('O_CREATE is not set and the named file does not exist')); - } else { - write_file_node(); - } - } - } - } - - function check_if_symbolic_link(error, result) { - if(error) { - callback(error); - } else { - var node = result; - if(node.mode == MODE_SYMBOLIC_LINK) { - followedCount++; - if(followedCount > SYMLOOP_MAX){ - callback(new Errors.ELOOP()); - } else { - follow_symbolic_link(node.data); - } - } else { - set_file_node(undefined, node); - } - } - } - - function follow_symbolic_link(data) { - data = normalize(data); - parentPath = dirname(data); - name = basename(data); - if(ROOT_DIRECTORY_NAME == name) { - if(_(flags).contains(O_WRITE)) { - callback(new Errors.EISDIR('the named file is a directory and O_WRITE is set')); - } else { - find_node(context, path, set_file_node); - } - } - find_node(context, parentPath, read_directory_data); - } - - function set_file_node(error, result) { - if(error) { - callback(error); - } else { - fileNode = result; - callback(null, fileNode); - } - } - - function write_file_node() { - fileNode = new Node(undefined, MODE_FILE); - fileNode.nlinks += 1; - context.put(fileNode.id, fileNode, write_file_data); - } - - function write_file_data(error) { - if(error) { - callback(error); - } else { - fileData = new Uint8Array(0); - context.put(fileNode.data, fileData, update_directory_data); - } - } - - function update_time(error) { - if(error) { - callback(error); - } else { - var now = Date.now(); - update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, handle_update_result); - } - } - - function update_directory_data(error) { - if(error) { - callback(error); - } else { - directoryData[name] = new DirectoryEntry(fileNode.id, MODE_FILE); - context.put(directoryNode.data, directoryData, update_time); - } - } - - function handle_update_result(error) { - if(error) { - callback(error); - } else { - callback(null, fileNode); - } - } - } - - function replace_data(context, ofd, buffer, offset, length, callback) { - var fileNode; - - function return_nbytes(error) { - if(error) { - callback(error); - } else { - callback(null, length); - } - } - - function update_time(error) { - if(error) { - callback(error); - } else { - var now = Date.now(); - update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes); - } - } - - function update_file_node(error) { - if(error) { - callback(error); - } else { - context.put(fileNode.id, fileNode, update_time); - } - } - - function write_file_data(error, result) { - if(error) { - callback(error); - } else { - fileNode = result; - var newData = new Uint8Array(length); - var bufferWindow = buffer.subarray(offset, offset + length); - newData.set(bufferWindow); - ofd.position = length; - - fileNode.size = length; - fileNode.version += 1; - - context.put(fileNode.data, newData, update_file_node); - } - } - - context.get(ofd.id, write_file_data); - } - - function write_data(context, ofd, buffer, offset, length, position, callback) { - var fileNode; - var fileData; - - function return_nbytes(error) { - if(error) { - callback(error); - } else { - callback(null, length); - } - } - - function update_time(error) { - if(error) { - callback(error); - } else { - var now = Date.now(); - update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, return_nbytes); - } - } - - function update_file_node(error) { - if(error) { - callback(error); - } else { - context.put(fileNode.id, fileNode, update_time); - } - } - - function update_file_data(error, result) { - if(error) { - callback(error); - } else { - fileData = result; - var _position = (!(undefined === position || null === position)) ? position : ofd.position; - var newSize = Math.max(fileData.length, _position + length); - var newData = new Uint8Array(newSize); - if(fileData) { - newData.set(fileData); - } - var bufferWindow = buffer.subarray(offset, offset + length); - newData.set(bufferWindow, _position); - if(undefined === position) { - ofd.position += length; - } - - fileNode.size = newSize; - fileNode.version += 1; - - context.put(fileNode.data, newData, update_file_node); - } - } - - function read_file_data(error, result) { - if(error) { - callback(error); - } else { - fileNode = result; - context.get(fileNode.data, update_file_data); - } - } - - context.get(ofd.id, read_file_data); - } - - function read_data(context, ofd, buffer, offset, length, position, callback) { - var fileNode; - var fileData; - - function handle_file_data(error, result) { - if(error) { - callback(error); - } else { - fileData = result; - var _position = (!(undefined === position || null === position)) ? position : ofd.position; - length = (_position + length > buffer.length) ? length - _position : length; - var dataView = fileData.subarray(_position, _position + length); - buffer.set(dataView, offset); - if(undefined === position) { - ofd.position += length; - } - callback(null, length); - } - } - - function update_time(error) { - if(error) { - callback(error); - } else { - - } - } - - function read_file_data(error, result) { - if(error) { - callback(error); - } else { - fileNode = result; - context.get(fileNode.data, handle_file_data); - } - } - - context.get(ofd.id, read_file_data); - } - - function stat_file(context, path, callback) { - path = normalize(path); - var name = basename(path); - - function check_file(error, result) { - if(error) { - callback(error); - } else { - callback(null, result); - } - } - - find_node(context, path, check_file); - } - - function fstat_file(context, ofd, callback) { - function check_file(error, result) { - if(error) { - callback(error); - } else { - callback(null, result); - } - } - - context.get(ofd.id, check_file); - } - - function lstat_file(context, path, callback) { - path = normalize(path); - var name = basename(path); - var parentPath = dirname(path); - - var directoryNode; - var directoryData; - - if(ROOT_DIRECTORY_NAME == name) { - find_node(context, path, check_file); - } else { - find_node(context, parentPath, read_directory_data); - } - - function read_directory_data(error, result) { - if(error) { - callback(error); - } else { - directoryNode = result; - context.get(directoryNode.data, check_if_file_exists); - } - } - - function check_if_file_exists(error, result) { - if(error) { - callback(error); - } else { - directoryData = result; - if(!_(directoryData).has(name)) { - callback(new Errors.ENOENT('a component of the path does not name an existing file')); - } else { - context.get(directoryData[name].id, check_file); - } - } - } - - function check_file(error, result) { - if(error) { - callback(error); - } else { - callback(null, result); - } - } - } - - function link_node(context, oldpath, newpath, callback) { - oldpath = normalize(oldpath); - var oldname = basename(oldpath); - var oldParentPath = dirname(oldpath); - - newpath = normalize(newpath); - var newname = basename(newpath); - var newParentPath = dirname(newpath); - - var oldDirectoryNode; - var oldDirectoryData; - var newDirectoryNode; - var newDirectoryData; - var fileNode; - - function update_time(error) { - if(error) { - callback(error); - } else { - update_node_times(context, newpath, fileNode, { ctime: Date.now() }, callback); - } - } - - function update_file_node(error, result) { - if(error) { - callback(error); - } else { - fileNode = result; - fileNode.nlinks += 1; - context.put(fileNode.id, fileNode, update_time); - } - } - - function read_directory_entry(error, result) { - if(error) { - callback(error); - } else { - context.get(newDirectoryData[newname].id, update_file_node); - } - } - - function check_if_new_file_exists(error, result) { - if(error) { - callback(error); - } else { - newDirectoryData = result; - if(_(newDirectoryData).has(newname)) { - callback(new Errors.EEXIST('newpath resolves to an existing file')); - } else { - newDirectoryData[newname] = oldDirectoryData[oldname]; - context.put(newDirectoryNode.data, newDirectoryData, read_directory_entry); - } - } - } - - function read_new_directory_data(error, result) { - if(error) { - callback(error); - } else { - newDirectoryNode = result; - context.get(newDirectoryNode.data, check_if_new_file_exists); - } - } - - function check_if_old_file_exists(error, result) { - if(error) { - callback(error); - } else { - oldDirectoryData = result; - if(!_(oldDirectoryData).has(oldname)) { - callback(new Errors.ENOENT('a component of either path prefix does not exist')); - } else { - find_node(context, newParentPath, read_new_directory_data); - } - } - } - - function read_old_directory_data(error, result) { - if(error) { - callback(error); - } else { - oldDirectoryNode = result; - context.get(oldDirectoryNode.data, check_if_old_file_exists); - } - } - - find_node(context, oldParentPath, read_old_directory_data); - } - - function unlink_node(context, path, callback) { - path = normalize(path); - var name = basename(path); - var parentPath = dirname(path); - - var directoryNode; - var directoryData; - var fileNode; - - function update_directory_data(error) { - if(error) { - callback(error); - } else { - delete directoryData[name]; - context.put(directoryNode.data, directoryData, function(error) { - var now = Date.now(); - update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback); - }); - } - } - - function delete_file_data(error) { - if(error) { - callback(error); - } else { - context.delete(fileNode.data, update_directory_data); - } - } - - function update_file_node(error, result) { - if(error) { - callback(error); - } else { - fileNode = result; - fileNode.nlinks -= 1; - if(fileNode.nlinks < 1) { - context.delete(fileNode.id, delete_file_data); - } else { - context.put(fileNode.id, fileNode, function(error) { - update_node_times(context, path, fileNode, { ctime: Date.now() }, update_directory_data); - }); - } - } - } - - function check_if_file_exists(error, result) { - if(error) { - callback(error); - } else { - directoryData = result; - if(!_(directoryData).has(name)) { - callback(new Errors.ENOENT('a component of the path does not name an existing file')); - } else { - context.get(directoryData[name].id, update_file_node); - } - } - } - - function read_directory_data(error, result) { - if(error) { - callback(error); - } else { - directoryNode = result; - context.get(directoryNode.data, check_if_file_exists); - } - } - - find_node(context, parentPath, read_directory_data); - } - - function read_directory(context, path, callback) { - path = normalize(path); - var name = basename(path); - - var directoryNode; - var directoryData; - - function handle_directory_data(error, result) { - if(error) { - callback(error); - } else { - directoryData = result; - var files = Object.keys(directoryData); - callback(null, files); - } - } - - function read_directory_data(error, result) { - if(error) { - callback(error); - } else { - directoryNode = result; - context.get(directoryNode.data, handle_directory_data); - } - } - - find_node(context, path, read_directory_data); - } - - function make_symbolic_link(context, srcpath, dstpath, callback) { - dstpath = normalize(dstpath); - var name = basename(dstpath); - var parentPath = dirname(dstpath); - - var directoryNode; - var directoryData; - var fileNode; - - if(ROOT_DIRECTORY_NAME == name) { - callback(new Errors.EEXIST()); - } else { - find_node(context, parentPath, read_directory_data); - } - - function read_directory_data(error, result) { - if(error) { - callback(error); - } else { - directoryNode = result; - context.get(directoryNode.data, check_if_file_exists); - } - } - - function check_if_file_exists(error, result) { - if(error) { - callback(error); - } else { - directoryData = result; - if(_(directoryData).has(name)) { - callback(new Errors.EEXIST()); - } else { - write_file_node(); - } - } - } - - function write_file_node() { - fileNode = new Node(undefined, MODE_SYMBOLIC_LINK); - fileNode.nlinks += 1; - fileNode.size = srcpath.length; - fileNode.data = srcpath; - context.put(fileNode.id, fileNode, update_directory_data); - } - - function update_time(error) { - if(error) { - callback(error); - } else { - var now = Date.now(); - update_node_times(context, parentPath, directoryNode, { mtime: now, ctime: now }, callback); - } - } - - function update_directory_data(error) { - if(error) { - callback(error); - } else { - directoryData[name] = new DirectoryEntry(fileNode.id, MODE_SYMBOLIC_LINK); - context.put(directoryNode.data, directoryData, update_time); - } - } - } - - function read_link(context, path, callback) { - path = normalize(path); - var name = basename(path); - var parentPath = dirname(path); - - var directoryNode; - var directoryData; - - find_node(context, parentPath, read_directory_data); - - function read_directory_data(error, result) { - if(error) { - callback(error); - } else { - directoryNode = result; - context.get(directoryNode.data, check_if_file_exists); - } - } - - function check_if_file_exists(error, result) { - if(error) { - callback(error); - } else { - directoryData = result; - if(!_(directoryData).has(name)) { - callback(new Errors.ENOENT('a component of the path does not name an existing file')); - } else { - context.get(directoryData[name].id, check_if_symbolic); - } - } - } - - function check_if_symbolic(error, result) { - if(error) { - callback(error); - } else { - if(result.mode != MODE_SYMBOLIC_LINK) { - callback(new Errors.EINVAL("path not a symbolic link")); - } else { - callback(null, result.data); - } - } - } - } - - function truncate_file(context, path, length, callback) { - path = normalize(path); - - var fileNode; - - function read_file_data (error, node) { - if (error) { - callback(error); - } else if(node.mode == MODE_DIRECTORY ) { - callback(new Errors.EISDIR()); - } else{ - fileNode = node; - context.get(fileNode.data, truncate_file_data); - } - } - - function truncate_file_data(error, fileData) { - if (error) { - callback(error); - } else { - var data = new Uint8Array(length); - if(fileData) { - data.set(fileData.subarray(0, length)); - } - context.put(fileNode.data, data, update_file_node); - } - } - - function update_time(error) { - if(error) { - callback(error); - } else { - var now = Date.now(); - update_node_times(context, path, fileNode, { mtime: now, ctime: now }, callback); - } - } - - function update_file_node (error) { - if(error) { - callback(error); - } else { - fileNode.size = length; - fileNode.version += 1; - context.put(fileNode.id, fileNode, update_time); - } - } - - if(length < 0) { - callback(new Errors.EINVAL('length cannot be negative')); - } else { - find_node(context, path, read_file_data); - } - } - - function ftruncate_file(context, ofd, length, callback) { - var fileNode; - - function read_file_data (error, node) { - if (error) { - callback(error); - } else if(node.mode == MODE_DIRECTORY ) { - callback(new Errors.EISDIR()); - } else{ - fileNode = node; - context.get(fileNode.data, truncate_file_data); - } - } - - function truncate_file_data(error, fileData) { - if (error) { - callback(error); - } else { - var data = new Uint8Array(length); - if(fileData) { - data.set(fileData.subarray(0, length)); - } - context.put(fileNode.data, data, update_file_node); - } - } - - function update_time(error) { - if(error) { - callback(error); - } else { - var now = Date.now(); - update_node_times(context, ofd.path, fileNode, { mtime: now, ctime: now }, callback); - } - } - function update_file_node (error) { - if(error) { - callback(error); - } else { - fileNode.size = length; - fileNode.version += 1; - context.put(fileNode.id, fileNode, update_time); - } - } - - if(length < 0) { - callback(new Errors.EINVAL('length cannot be negative')); - } else { - context.get(ofd.id, read_file_data); - } - } - - function utimes_file(context, path, atime, mtime, callback) { - path = normalize(path); - - function update_times(error, node) { - if (error) { - callback(error); - } else { - update_node_times(context, path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback); - } - } - - if (typeof atime != 'number' || typeof mtime != 'number') { - callback(new Errors.EINVAL('atime and mtime must be number')); - } - else if (atime < 0 || mtime < 0) { - callback(new Errors.EINVAL('atime and mtime must be positive integers')); - } - else { - find_node(context, path, update_times); - } - } - - function futimes_file(context, ofd, atime, mtime, callback) { - - function update_times (error, node) { - if (error) { - callback(error); - } else { - update_node_times(context, ofd.path, node, { atime: atime, ctime: mtime, mtime: mtime }, callback); - } - } - - if (typeof atime != 'number' || typeof mtime != 'number') { - callback(new Errors.EINVAL('atime and mtime must be a number')); - } - else if (atime < 0 || mtime < 0) { - callback(new Errors.EINVAL('atime and mtime must be positive integers')); - } - else { - context.get(ofd.id, update_times); - } - } - - function setxattr_file (context, path, name, value, flag, callback) { - path = normalize(path); - - if (typeof name != 'string') { - callback(new Errors.EINVAL('attribute name must be a string')); - } - else if (!name) { - callback(new Errors.EINVAL('attribute name cannot be an empty string')); - } - else if (flag !== null && - flag !== XATTR_CREATE && flag !== XATTR_REPLACE) { - callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE')); - } - else { - set_extended_attribute(context, path, name, value, flag, callback); - } - } - - function fsetxattr_file (context, ofd, name, value, flag, callback) { - - if (typeof name != 'string') { - callback(new Errors.EINVAL('attribute name must be a string')); - } - else if (!name) { - callback(new Errors.EINVAL('attribute name cannot be an empty string')); - } - else if (flag !== null && - flag !== XATTR_CREATE && flag !== XATTR_REPLACE) { - callback(new Errors.EINVAL('invalid flag, must be null, XATTR_CREATE or XATTR_REPLACE')); - } - else { - set_extended_attribute(context, ofd, name, value, flag, callback); - } - } - - function getxattr_file (context, path, name, callback) { - path = normalize(path); - - function get_xattr(error, node) { - var xattr = (node ? node.xattrs[name] : null); - - if (error) { - callback (error); - } - else if (!node.xattrs.hasOwnProperty(name)) { - callback(new Errors.ENOATTR()); - } - else { - callback(null, node.xattrs[name]); - } - } - - if (typeof name != 'string') { - callback(new Errors.EINVAL('attribute name must be a string')); - } - else if (!name) { - callback(new Errors.EINVAL('attribute name cannot be an empty string')); - } - else { - find_node(context, path, get_xattr); - } - } - - function fgetxattr_file (context, ofd, name, callback) { - - function get_xattr (error, node) { - var xattr = (node ? node.xattrs[name] : null); - - if (error) { - callback(error); - } - else if (!node.xattrs.hasOwnProperty(name)) { - callback(new Errors.ENOATTR()); - } - else { - callback(null, node.xattrs[name]); - } - } - - if (typeof name != 'string') { - callback(new Errors.EINVAL()); - } - else if (!name) { - callback(new Errors.EINVAL('attribute name cannot be an empty string')); - } - else { - context.get(ofd.id, get_xattr); - } - } - - function removexattr_file (context, path, name, callback) { - path = normalize(path); - - function remove_xattr (error, node) { - var xattr = (node ? node.xattrs : null); - - function update_time(error) { - if(error) { - callback(error); - } else { - update_node_times(context, path, node, { ctime: Date.now() }, callback); - } - } - - if (error) { - callback(error); - } - else if (!xattr.hasOwnProperty(name)) { - callback(new Errors.ENOATTR()); - } - else { - delete node.xattrs[name]; - context.put(node.id, node, update_time); - } - } - - if (typeof name != 'string') { - callback(new Errors.EINVAL('attribute name must be a string')); - } - else if (!name) { - callback(new Errors.EINVAL('attribute name cannot be an empty string')); - } - else { - find_node(context, path, remove_xattr); - } - } - - function fremovexattr_file (context, ofd, name, callback) { - - function remove_xattr (error, node) { - function update_time(error) { - if(error) { - callback(error); - } else { - update_node_times(context, ofd.path, node, { ctime: Date.now() }, callback); - } - } - - if (error) { - callback(error); - } - else if (!node.xattrs.hasOwnProperty(name)) { - callback(new Errors.ENOATTR()); - } - else { - delete node.xattrs[name]; - context.put(node.id, node, update_time); - } - } - - if (typeof name != 'string') { - callback(new Errors.EINVAL('attribute name must be a string')); - } - else if (!name) { - callback(new Errors.EINVAL('attribute name cannot be an empty string')); - } - else { - context.get(ofd.id, remove_xattr); - } - } - - function validate_flags(flags) { - if(!_(O_FLAGS).has(flags)) { - return null; - } - return O_FLAGS[flags]; - } - - function validate_file_options(options, enc, fileMode){ - if(!options) { - options = { encoding: enc, flag: fileMode }; - } else if(typeof options === "function") { - options = { encoding: enc, flag: fileMode }; - } else if(typeof options === "string") { - options = { encoding: options, flag: fileMode }; - } - return options; - } - - function pathCheck(path, callback) { - var err; - if(isNullPath(path)) { - err = new Error('Path must be a string without null bytes.'); - } else if(!isAbsolutePath(path)) { - err = new Error('Path must be absolute.'); - } - - if(err) { - callback(err); - return false; - } - return true; - } - - // node.js supports a calling pattern that leaves off a callback. - function maybeCallback(callback) { - if(typeof callback === "function") { - return callback; - } - return function(err) { - if(err) { - throw err; - } - }; - } - - - /* - * FileSystem - * - * A FileSystem takes an `options` object, which can specify a number of, - * options. All options are optional, and include: - * - * name: the name of the file system, defaults to "local" - * - * flags: one or more flags to use when creating/opening the file system. - * For example: "FORMAT" will cause the file system to be formatted. - * No explicit flags are set by default. - * - * provider: an explicit storage provider to use for the file - * system's database context provider. A number of context - * providers are included (see /src/providers), and users - * can write one of their own and pass it in to be used. - * By default an IndexedDB provider is used. - * - * callback: a callback function to be executed when the file system becomes - * ready for use. Depending on the context provider used, this might - * be right away, or could take some time. The callback should expect - * an `error` argument, which will be null if everything worked. Also - * users should check the file system's `readyState` and `error` - * properties to make sure it is usable. - */ - function FileSystem(options, callback) { - options = options || {}; - callback = callback || nop; - - var name = options.name || FILE_SYSTEM_NAME; - var flags = options.flags; - var provider = options.provider || new providers.Default(name); - var forceFormatting = _(flags).contains(FS_FORMAT); - - var fs = this; - fs.readyState = FS_PENDING; - fs.name = name; - fs.error = null; - - // Safely expose the list of open files and file - // descriptor management functions - var openFiles = {}; - var nextDescriptor = 1; - Object.defineProperty(this, "openFiles", { - get: function() { return openFiles; } - }); - this.allocDescriptor = function(openFileDescription) { - var fd = nextDescriptor ++; - openFiles[fd] = openFileDescription; - return fd; - }; - this.releaseDescriptor = function(fd) { - delete openFiles[fd]; - }; - - // Safely expose the operation queue - var queue = []; - this.queueOrRun = function(operation) { - var error; - - if(FS_READY == fs.readyState) { - operation.call(fs); - } else if(FS_ERROR == fs.readyState) { - error = new Errors.EFILESYSTEMERROR('unknown error'); - } else { - queue.push(operation); - } - - return error; - }; - function runQueued() { - queue.forEach(function(operation) { - operation.call(this); - }.bind(fs)); - queue = null; - } - - // We support the optional `options` arg from node, but ignore it - this.watch = function(filename, options, listener) { - if(isNullPath(filename)) { - throw new Error('Path must be a string without null bytes.'); - } - if(typeof options === 'function') { - listener = options; - options = {}; - } - options = options || {}; - listener = listener || nop; - - var watcher = new FSWatcher(); - watcher.start(filename, false, options.recursive); - watcher.on('change', listener); - - return watcher; - }; - - // Let other instances (in this or other windows) know about - // any changes to this fs instance. - function broadcastChanges(changes) { - if(!changes.length) { - return; - } - var intercom = Intercom.getInstance(); - changes.forEach(function(change) { - intercom.emit(change.event, change.path); - }); - } - - // Open file system storage provider - provider.open(function(err, needsFormatting) { - function complete(error) { - - function wrappedContext(methodName) { - var context = provider[methodName](); - context.flags = flags; - context.changes = []; - - // When the context is finished, let the fs deal with any change events - context.close = function() { - var changes = context.changes; - broadcastChanges(changes); - changes.length = 0; - }; - - return context; - } - - // Wrap the provider so we can extend the context with fs flags and - // an array of changes (e.g., watch event 'change' and 'rename' events - // for paths updated during the lifetime of the context). From this - // point forward we won't call open again, so it's safe to drop it. - fs.provider = { - openReadWriteContext: function() { - return wrappedContext('getReadWriteContext'); - }, - openReadOnlyContext: function() { - return wrappedContext('getReadOnlyContext'); - } - }; - - if(error) { - fs.readyState = FS_ERROR; - } else { - fs.readyState = FS_READY; - runQueued(); - } - callback(error, fs); - } - - if(err) { - return complete(err); - } - - // If we don't need or want formatting, we're done - if(!(forceFormatting || needsFormatting)) { - return complete(null); - } - // otherwise format the fs first - var context = provider.getReadWriteContext(); - context.clear(function(err) { - if(err) { - complete(err); - return; - } - make_root_directory(context, complete); - }); - }); - } - - // Expose storage providers on FileSystem constructor - FileSystem.providers = providers; - - // Expose adatpers on FileSystem constructor - FileSystem.adapters = adapters; - - function _open(fs, context, path, flags, callback) { - if(!pathCheck(path, callback)) return; - - function check_result(error, fileNode) { - if(error) { - callback(error); - } else { - var position; - if(_(flags).contains(O_APPEND)) { - position = fileNode.size; - } else { - position = 0; - } - var openFileDescription = new OpenFileDescription(path, fileNode.id, flags, position); - var fd = fs.allocDescriptor(openFileDescription); - callback(null, fd); - } - } - - flags = validate_flags(flags); - if(!flags) { - callback(new Errors.EINVAL('flags is not valid')); - } - - open_file(context, path, flags, check_result); - } - - function _close(fs, fd, callback) { - if(!_(fs.openFiles).has(fd)) { - callback(new Errors.EBADF()); - } else { - fs.releaseDescriptor(fd); - callback(null); - } - } - - function _mkdir(context, path, callback) { - if(!pathCheck(path, callback)) return; - - function check_result(error) { - if(error) { - callback(error); - } else { - callback(null); - } - } - - make_directory(context, path, check_result); - } - - function _rmdir(context, path, callback) { - if(!pathCheck(path, callback)) return; - - function check_result(error) { - if(error) { - callback(error); - } else { - callback(null); - } - } - - remove_directory(context, path, check_result); - } - - function _stat(context, name, path, callback) { - if(!pathCheck(path, callback)) return; - - function check_result(error, result) { - if(error) { - callback(error); - } else { - var stats = new Stats(result, name); - callback(null, stats); - } - } - - stat_file(context, path, check_result); - } - - function _fstat(fs, context, fd, callback) { - function check_result(error, result) { - if(error) { - callback(error); - } else { - var stats = new Stats(result, fs.name); - callback(null, stats); - } - } - - var ofd = fs.openFiles[fd]; - - if(!ofd) { - callback(new Errors.EBADF()); - } else { - fstat_file(context, ofd, check_result); - } - } - - function _link(context, oldpath, newpath, callback) { - if(!pathCheck(oldpath, callback)) return; - if(!pathCheck(newpath, callback)) return; - - function check_result(error) { - if(error) { - callback(error); - } else { - callback(null); - } - } - - link_node(context, oldpath, newpath, check_result); - } - - function _unlink(context, path, callback) { - if(!pathCheck(path, callback)) return; - - function check_result(error) { - if(error) { - callback(error); - } else { - callback(null); - } - } - - unlink_node(context, path, check_result); - } - - function _read(fs, context, fd, buffer, offset, length, position, callback) { - offset = (undefined === offset) ? 0 : offset; - length = (undefined === length) ? buffer.length - offset : length; - - function check_result(error, nbytes) { - if(error) { - callback(error); - } else { - callback(null, nbytes); - } - } - - var ofd = fs.openFiles[fd]; - - if(!ofd) { - callback(new Errors.EBADF()); - } else if(!_(ofd.flags).contains(O_READ)) { - callback(new Errors.EBADF('descriptor does not permit reading')); - } else { - read_data(context, ofd, buffer, offset, length, position, check_result); - } - } - - function _readFile(fs, context, path, options, callback) { - options = validate_file_options(options, null, 'r'); - - if(!pathCheck(path, callback)) return; - - var flags = validate_flags(options.flag || 'r'); - if(!flags) { - callback(new Errors.EINVAL('flags is not valid')); - } - - open_file(context, path, flags, function(err, fileNode) { - if(err) { - return callback(err); - } - var ofd = new OpenFileDescription(path, fileNode.id, flags, 0); - var fd = fs.allocDescriptor(ofd); - - fstat_file(context, ofd, function(err2, fstatResult) { - if(err2) { - return callback(err2); - } - - var stats = new Stats(fstatResult, fs.name); - var size = stats.size; - var buffer = new Uint8Array(size); - - read_data(context, ofd, buffer, 0, size, 0, function(err3, nbytes) { - if(err3) { - return callback(err3); - } - fs.releaseDescriptor(fd); - - var data; - if(options.encoding === 'utf8') { - data = new TextDecoder('utf-8').decode(buffer); - } else { - data = buffer; - } - callback(null, data); - }); - }); - }); - } - - function _write(fs, context, fd, buffer, offset, length, position, callback) { - offset = (undefined === offset) ? 0 : offset; - length = (undefined === length) ? buffer.length - offset : length; - - function check_result(error, nbytes) { - if(error) { - callback(error); - } else { - callback(null, nbytes); - } - } - - var ofd = fs.openFiles[fd]; - - if(!ofd) { - callback(new Errors.EBADF()); - } else if(!_(ofd.flags).contains(O_WRITE)) { - callback(new Errors.EBADF('descriptor does not permit writing')); - } else if(buffer.length - offset < length) { - callback(new Errors.EIO('intput buffer is too small')); - } else { - write_data(context, ofd, buffer, offset, length, position, check_result); - } - } - - function _writeFile(fs, context, path, data, options, callback) { - options = validate_file_options(options, 'utf8', 'w'); - - if(!pathCheck(path, callback)) return; - - var flags = validate_flags(options.flag || 'w'); - if(!flags) { - callback(new Errors.EINVAL('flags is not valid')); - } - - data = data || ''; - if(typeof data === "number") { - data = '' + data; - } - if(typeof data === "string" && options.encoding === 'utf8') { - data = new TextEncoder('utf-8').encode(data); - } - - open_file(context, path, flags, function(err, fileNode) { - if(err) { - return callback(err); - } - var ofd = new OpenFileDescription(path, fileNode.id, flags, 0); - var fd = fs.allocDescriptor(ofd); - - replace_data(context, ofd, data, 0, data.length, function(err2, nbytes) { - if(err2) { - return callback(err2); - } - fs.releaseDescriptor(fd); - callback(null); - }); - }); - } - - function _appendFile(fs, context, path, data, options, callback) { - options = validate_file_options(options, 'utf8', 'a'); - - if(!pathCheck(path, callback)) return; - - var flags = validate_flags(options.flag || 'a'); - if(!flags) { - callback(new Errors.EINVAL('flags is not valid')); - } - - data = data || ''; - if(typeof data === "number") { - data = '' + data; - } - if(typeof data === "string" && options.encoding === 'utf8') { - data = new TextEncoder('utf-8').encode(data); - } - - open_file(context, path, flags, function(err, fileNode) { - if(err) { - return callback(err); - } - var ofd = new OpenFileDescription(path, fileNode.id, flags, fileNode.size); - var fd = fs.allocDescriptor(ofd); - - write_data(context, ofd, data, 0, data.length, ofd.position, function(err2, nbytes) { - if(err2) { - return callback(err2); - } - fs.releaseDescriptor(fd); - callback(null); - }); - }); - } - - function _exists (context, name, path, callback) { - function cb(err, stats) { - callback(err ? false : true); - } - _stat(context, name, path, cb); - } - - function _getxattr (context, path, name, callback) { - if (!pathCheck(path, callback)) return; - - function fetch_value (error, value) { - if (error) { - callback(error); - } - else { - callback(null, value); - } - } - - getxattr_file(context, path, name, fetch_value); - } - - function _fgetxattr (fs, context, fd, name, callback) { - - function get_result (error, value) { - if (error) { - callback(error); - } - else { - callback(null, value); - } - } - - var ofd = fs.openFiles[fd]; - - if (!ofd) { - callback(new Errors.EBADF()); - } - else { - fgetxattr_file(context, ofd, name, get_result); - } - } - - function _setxattr (context, path, name, value, flag, callback) { - if (!pathCheck(path, callback)) return; - - function check_result (error) { - if (error) { - callback(error); - } - else { - callback(null); - } - } - - setxattr_file(context, path, name, value, flag, check_result); - } - - function _fsetxattr (fs, context, fd, name, value, flag, callback) { - function check_result (error) { - if (error) { - callback(error); - } - else { - callback(null); - } - } - - var ofd = fs.openFiles[fd]; - - if (!ofd) { - callback(new Errors.EBADF()); - } - else if (!_(ofd.flags).contains(O_WRITE)) { - callback(new Errors.EBADF('descriptor does not permit writing')); - } - else { - fsetxattr_file(context, ofd, name, value, flag, check_result); - } - } - - function _removexattr (context, path, name, callback) { - if (!pathCheck(path, callback)) return; - - function remove_xattr (error) { - if (error) { - callback(error); - } - else { - callback(null); - } - } - - removexattr_file (context, path, name, remove_xattr); - } - - function _fremovexattr (fs, context, fd, name, callback) { - - function remove_xattr (error) { - if (error) { - callback(error); - } - else { - callback(null); - } - } - - var ofd = fs.openFiles[fd]; - - if (!ofd) { - callback(new Errors.EBADF()); - } - else if (!_(ofd.flags).contains(O_WRITE)) { - callback(new Errors.EBADF('descriptor does not permit writing')); - } - else { - fremovexattr_file(context, ofd, name, remove_xattr); - } - } - - function _lseek(fs, context, fd, offset, whence, callback) { - function check_result(error, offset) { - if(error) { - callback(error); - } else { - callback(offset); - } - } - - function update_descriptor_position(error, stats) { - if(error) { - callback(error); - } else { - if(stats.size + offset < 0) { - callback(new Errors.EINVAL('resulting file offset would be negative')); - } else { - ofd.position = stats.size + offset; - callback(null, ofd.position); - } - } - } - - var ofd = fs.openFiles[fd]; - - if(!ofd) { - callback(new Errors.EBADF()); - } - - if('SET' === whence) { - if(offset < 0) { - callback(new Errors.EINVAL('resulting file offset would be negative')); - } else { - ofd.position = offset; - callback(null, ofd.position); - } - } else if('CUR' === whence) { - if(ofd.position + offset < 0) { - callback(new Errors.EINVAL('resulting file offset would be negative')); - } else { - ofd.position += offset; - callback(null, ofd.position); - } - } else if('END' === whence) { - fstat_file(context, ofd, update_descriptor_position); - } else { - callback(new Errors.EINVAL('whence argument is not a proper value')); - } - } - - function _readdir(context, path, callback) { - if(!pathCheck(path, callback)) return; - - function check_result(error, files) { - if(error) { - callback(error); - } else { - callback(null, files); - } - } - - read_directory(context, path, check_result); - } - - function _utimes(context, path, atime, mtime, callback) { - if(!pathCheck(path, callback)) return; - - var currentTime = Date.now(); - atime = (atime) ? atime : currentTime; - mtime = (mtime) ? mtime : currentTime; - - function check_result(error) { - if (error) { - callback(error); - } - else { - callback(null); - } - } - utimes_file(context, path, atime, mtime, check_result); - } - - function _futimes(fs, context, fd, atime, mtime, callback) { - function check_result(error) { - if (error) { - callback(error); - } - else { - callback(null); - } - } - - var currentTime = Date.now(); - atime = (atime) ? atime : currentTime; - mtime = (mtime) ? mtime : currentTime; - - var ofd = fs.openFiles[fd]; - - if(!ofd) { - callback(new Errors.EBADF()); - } else if(!_(ofd.flags).contains(O_WRITE)) { - callback(new Errors.EBADF('descriptor does not permit writing')); - } else { - futimes_file(context, ofd, atime, mtime, check_result); - } - } - - function _rename(context, oldpath, newpath, callback) { - if(!pathCheck(oldpath, callback)) return; - if(!pathCheck(newpath, callback)) return; - - function check_result(error) { - if(error) { - callback(error); - } else { - callback(null); - } - } - - function unlink_old_node(error) { - if(error) { - callback(error); - } else { - unlink_node(context, oldpath, check_result); - } - } - - link_node(context, oldpath, newpath, unlink_old_node); - } - - function _symlink(context, srcpath, dstpath, callback) { - if(!pathCheck(srcpath, callback)) return; - if(!pathCheck(dstpath, callback)) return; - - function check_result(error) { - if(error) { - callback(error); - } else { - callback(null); - } - } - - make_symbolic_link(context, srcpath, dstpath, check_result); - } - - function _readlink(context, path, callback) { - if(!pathCheck(path, callback)) return; - - function check_result(error, result) { - if(error) { - callback(error); - } else { - callback(null, result); - } - } - - read_link(context, path, check_result); - } - - function _realpath(fd, length, callback) { - // TODO - } - - function _lstat(fs, context, path, callback) { - if(!pathCheck(path, callback)) return; - - function check_result(error, result) { - if(error) { - callback(error); - } else { - var stats = new Stats(result, fs.name); - callback(null, stats); - } - } - - lstat_file(context, path, check_result); - } - - function _truncate(context, path, length, callback) { - if(!pathCheck(path, callback)) return; - - function check_result(error) { - if(error) { - callback(error); - } else { - callback(null); - } - } - - truncate_file(context, path, length, check_result); - } - - function _ftruncate(fs, context, fd, length, callback) { - function check_result(error) { - if(error) { - callback(error); - } else { - callback(null); - } - } - - var ofd = fs.openFiles[fd]; - - if(!ofd) { - callback(new Errors.EBADF()); - } else if(!_(ofd.flags).contains(O_WRITE)) { - callback(new Errors.EBADF('descriptor does not permit writing')); - } else { - ftruncate_file(context, ofd, length, check_result); - } - } - - - /** - * Public API for FileSystem - */ - - FileSystem.prototype.open = function(path, flags, mode, callback) { - // We support the same signature as node with a `mode` arg, but - // ignore it. Find the callback. - callback = maybeCallback(arguments[arguments.length - 1]); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _open(fs, context, path, flags, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.close = function(fd, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _close(fs, fd, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.mkdir = function(path, mode, callback) { - // Support passing a mode arg, but we ignore it internally for now. - if(typeof mode === 'function') { - callback = mode; - } - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _mkdir(context, path, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.rmdir = function(path, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _rmdir(context, path, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.stat = function(path, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _stat(context, fs.name, path, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.fstat = function(fd, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _fstat(fs, context, fd, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.link = function(oldpath, newpath, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _link(context, oldpath, newpath, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.unlink = function(path, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _unlink(context, path, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.read = function(fd, buffer, offset, length, position, callback) { - // Follow how node.js does this - callback = maybeCallback(callback); - function wrapper(err, bytesRead) { - // Retain a reference to buffer so that it can't be GC'ed too soon. - callback(err, bytesRead || 0, buffer); - } - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - wrapper.apply(this, arguments); - } - _read(fs, context, fd, buffer, offset, length, position, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.readFile = function(path, options, callback_) { - var callback = maybeCallback(arguments[arguments.length - 1]); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _readFile(fs, context, path, options, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.write = function(fd, buffer, offset, length, position, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _write(fs, context, fd, buffer, offset, length, position, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.writeFile = function(path, data, options, callback_) { - var callback = maybeCallback(arguments[arguments.length - 1]); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _writeFile(fs, context, path, data, options, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.appendFile = function(path, data, options, callback_) { - var callback = maybeCallback(arguments[arguments.length - 1]); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _appendFile(fs, context, path, data, options, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.exists = function(path, callback_) { - var callback = maybeCallback(arguments[arguments.length - 1]); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _exists(context, fs.name, path, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.lseek = function(fd, offset, whence, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _lseek(fs, context, fd, offset, whence, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.readdir = function(path, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _readdir(context, path, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.rename = function(oldpath, newpath, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _rename(context, oldpath, newpath, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.readlink = function(path, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _readlink(context, path, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.symlink = function(srcpath, dstpath, type, callback_) { - // Follow node.js in allowing the `type` arg to be passed, but we ignore it. - var callback = maybeCallback(arguments[arguments.length - 1]); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _symlink(context, srcpath, dstpath, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.lstat = function(path, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _lstat(fs, context, path, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.truncate = function(path, length, callback) { - // Follow node.js in allowing the `length` to be optional - if(typeof length === 'function') { - callback = length; - length = 0; - } - callback = maybeCallback(callback); - length = typeof length === 'number' ? length : 0; - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _truncate(context, path, length, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.ftruncate = function(fd, length, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function() { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _ftruncate(fs, context, fd, length, complete); - } - ); - if(error) callback(error); - }; - FileSystem.prototype.utimes = function(path, atime, mtime, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function () { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _utimes(context, path, atime, mtime, complete); - } - ); - if (error) { - callback(error); - } - }; - FileSystem.prototype.futimes = function(fd, atime, mtime, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function () { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _futimes(fs, context, fd, atime, mtime, complete); - } - ); - if (error) { - callback(error); - } - }; - FileSystem.prototype.setxattr = function (path, name, value, flag, callback) { - callback = maybeCallback(arguments[arguments.length - 1]); - var _flag = (typeof flag != 'function') ? flag : null; - var fs = this; - var error = fs.queueOrRun( - function () { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _setxattr(context, path, name, value, _flag, complete); - } - ); - if (error) { - callback(error); - } - }; - FileSystem.prototype.getxattr = function (path, name, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function () { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _getxattr(context, path, name, complete); - } - ); - if (error) { - callback(error); - } - }; - FileSystem.prototype.fsetxattr = function (fd, name, value, flag, callback) { - callback = maybeCallback(arguments[arguments.length - 1]); - var _flag = (typeof flag != 'function') ? flag : null; - var fs = this; - var error = fs.queueOrRun( - function () { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _fsetxattr(fs, context, fd, name, value, _flag, complete); - } - ); - if (error) { - callback(error); - } - }; - FileSystem.prototype.fgetxattr = function (fd, name, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function () { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _fgetxattr(fs, context, fd, name, complete); - } - ); - if (error) { - callback(error); - } - }; - FileSystem.prototype.removexattr = function (path, name, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function () { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _removexattr(context, path, name, complete); - } - ); - if (error) { - callback(error); - } - }; - FileSystem.prototype.fremovexattr = function (fd, name, callback) { - callback = maybeCallback(callback); - var fs = this; - var error = fs.queueOrRun( - function () { - var context = fs.provider.openReadWriteContext(); - function complete() { - context.close(); - callback.apply(fs, arguments); - } - _fremovexattr(fs, context, fd, name, complete); - } - ); - if (error) { - callback(error); - } - }; - FileSystem.prototype.Shell = function(options) { - return new Shell(this, options); - }; - - return FileSystem; - -});