2863 lines
76 KiB
JavaScript
2863 lines
76 KiB
JavaScript
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 guid = require('src/shared').guid;
|
|
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/fswatcher');
|
|
var Errors = require('src/errors');
|
|
|
|
/*
|
|
* DirectoryEntry
|
|
*/
|
|
|
|
function DirectoryEntry(id, type) {
|
|
this.id = id;
|
|
this.type = type || MODE_FILE;
|
|
}
|
|
|
|
/*
|
|
* OpenFileDescription
|
|
*/
|
|
|
|
function OpenFileDescription(path, id, flags, position) {
|
|
this.path = path;
|
|
this.id = id;
|
|
this.flags = flags;
|
|
this.position = position;
|
|
}
|
|
|
|
/*
|
|
* SuperNode
|
|
*/
|
|
|
|
function SuperNode(atime, ctime, mtime) {
|
|
var now = Date.now();
|
|
|
|
this.id = SUPER_NODE_ID;
|
|
this.mode = MODE_META;
|
|
this.atime = atime || now;
|
|
this.ctime = ctime || now;
|
|
this.mtime = mtime || now;
|
|
this.rnode = guid(); // root node id (randomly generated)
|
|
}
|
|
|
|
/*
|
|
* Node
|
|
*/
|
|
|
|
function Node(id, mode, size, atime, ctime, mtime, flags, xattrs, nlinks, version) {
|
|
var now = Date.now();
|
|
|
|
this.id = id || guid();
|
|
this.mode = mode || MODE_FILE; // node type (file, directory, etc)
|
|
this.size = size || 0; // size (bytes for files, entries for directories)
|
|
this.atime = atime || now; // access time (will mirror ctime after creation)
|
|
this.ctime = ctime || now; // creation/change time
|
|
this.mtime = mtime || now; // modified time
|
|
this.flags = flags || []; // file flags
|
|
this.xattrs = xattrs || {}; // extended attributes
|
|
this.nlinks = nlinks || 0; // links count
|
|
this.version = version || 0; // node version
|
|
this.blksize = undefined; // block size
|
|
this.nblocks = 1; // blocks count
|
|
this.data = guid(); // id for data object
|
|
}
|
|
|
|
/*
|
|
* Stats
|
|
*/
|
|
|
|
function Stats(fileNode, devName) {
|
|
this.node = fileNode.id;
|
|
this.dev = devName;
|
|
this.size = fileNode.size;
|
|
this.nlinks = fileNode.nlinks;
|
|
this.atime = fileNode.atime;
|
|
this.mtime = fileNode.mtime;
|
|
this.ctime = fileNode.ctime;
|
|
this.type = fileNode.mode;
|
|
}
|
|
|
|
Stats.prototype.isFile = function() {
|
|
return this.type === MODE_FILE;
|
|
};
|
|
|
|
Stats.prototype.isDirectory = function() {
|
|
return this.type === MODE_DIRECTORY;
|
|
};
|
|
|
|
Stats.prototype.isBlockDevice = function() {
|
|
return false;
|
|
};
|
|
|
|
Stats.prototype.isCharacterDevice = function() {
|
|
return false;
|
|
};
|
|
|
|
Stats.prototype.isSymbolicLink = function() {
|
|
return this.type === MODE_SYMBOLIC_LINK;
|
|
};
|
|
|
|
Stats.prototype.isFIFO = function() {
|
|
return false;
|
|
};
|
|
|
|
Stats.prototype.isSocket = function() {
|
|
return false;
|
|
};
|
|
|
|
/*
|
|
* 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.ENoEntry('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.ENoEntry());
|
|
} 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.ENotDirectory('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.ENoEntry());
|
|
} 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.EExists('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.EInvalid('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.EExists());
|
|
} else if(error && !error instanceof Errors.ENoEntry) {
|
|
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.EExists());
|
|
} else if(error && !error instanceof Errors.ENoEntry) {
|
|
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.ENoEntry());
|
|
} 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.ENotDirectory());
|
|
} 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.EIsDirectory('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.ENoEntry('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.EIsDirectory('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.ENoEntry('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('too many symbolic links were encountered'));
|
|
} 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.EIsDirectory('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.ENoEntry('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.EExists('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.ENoEntry('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.ENoEntry('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.EExists('the destination path already exists'));
|
|
} 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.EExists('the destination path already exists'));
|
|
} 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.ENoEntry('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.EInvalid("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.EIsDirectory('the named file is a directory'));
|
|
} 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.EInvalid('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.EIsDirectory('the named file is a directory'));
|
|
} 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.EInvalid('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.EInvalid('atime and mtime must be number'));
|
|
}
|
|
else if (atime < 0 || mtime < 0) {
|
|
callback(new Errors.EInvalid('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.EInvalid('atime and mtime must be a number'));
|
|
}
|
|
else if (atime < 0 || mtime < 0) {
|
|
callback(new Errors.EInvalid('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.EInvalid('attribute name must be a string'));
|
|
}
|
|
else if (!name) {
|
|
callback(new Errors.EInvalid('attribute name cannot be an empty string'));
|
|
}
|
|
else if (flag !== null &&
|
|
flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {
|
|
callback(new Errors.EInvalid('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.EInvalid('attribute name must be a string'));
|
|
}
|
|
else if (!name) {
|
|
callback(new Errors.EInvalid('attribute name cannot be an empty string'));
|
|
}
|
|
else if (flag !== null &&
|
|
flag !== XATTR_CREATE && flag !== XATTR_REPLACE) {
|
|
callback(new Errors.EInvalid('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('attribute does not exist'));
|
|
}
|
|
else {
|
|
callback(null, node.xattrs[name]);
|
|
}
|
|
}
|
|
|
|
if (typeof name != 'string') {
|
|
callback(new Errors.EInvalid('attribute name must be a string'));
|
|
}
|
|
else if (!name) {
|
|
callback(new Errors.EInvalid('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('attribute does not exist'));
|
|
}
|
|
else {
|
|
callback(null, node.xattrs[name]);
|
|
}
|
|
}
|
|
|
|
if (typeof name != 'string') {
|
|
callback(new Errors.EInvalid('attribute name must be a string'));
|
|
}
|
|
else if (!name) {
|
|
callback(new Errors.EInvalid('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('attribute does not exist'));
|
|
}
|
|
else {
|
|
delete node.xattrs[name];
|
|
context.put(node.id, node, update_time);
|
|
}
|
|
}
|
|
|
|
if (typeof name != 'string') {
|
|
callback(new Errors.EInvalid('attribute name must be a string'));
|
|
}
|
|
else if (!name) {
|
|
callback(new Errors.EInvalid('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('attribute does not exist'));
|
|
}
|
|
else {
|
|
delete node.xattrs[name];
|
|
context.put(node.id, node, update_time);
|
|
}
|
|
}
|
|
|
|
if (typeof name != 'string') {
|
|
callback(new Errors.EInvalid('attribute name must be a string'));
|
|
}
|
|
else if (!name) {
|
|
callback(new Errors.EInvalid('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 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.EInvalid('flags is not valid'));
|
|
}
|
|
|
|
open_file(context, path, flags, check_result);
|
|
}
|
|
|
|
function _close(fs, fd, callback) {
|
|
if(!_(fs.openFiles).has(fd)) {
|
|
callback(new Errors.EBadFileDescriptor('invalid file descriptor'));
|
|
} 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 EBadFileDescriptor('invalid file descriptor'));
|
|
} 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.EBadFileDescriptor('invalid file descriptor'));
|
|
} else if(!_(ofd.flags).contains(O_READ)) {
|
|
callback(new Errors.EBadFileDescriptor('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.EInvalid('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.EBadFileDescriptor('invalid file descriptor'));
|
|
} else if(!_(ofd.flags).contains(O_WRITE)) {
|
|
callback(new Errors.EBadFileDescriptor('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.EInvalid('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.EInvalid('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.EBadFileDescriptor('invalid file descriptor'));
|
|
}
|
|
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.EBadFileDescriptor('invalid file descriptor'));
|
|
}
|
|
else if (!_(ofd.flags).contains(O_WRITE)) {
|
|
callback(new Errors.EBadFileDescriptor('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.EBadFileDescriptor('invalid file descriptor'));
|
|
}
|
|
else if (!_(ofd.flags).contains(O_WRITE)) {
|
|
callback(new Errors.EBadFileDescriptor('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.EInvalid('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.EBadFileDescriptor('invalid file descriptor'));
|
|
}
|
|
|
|
if('SET' === whence) {
|
|
if(offset < 0) {
|
|
callback(new Errors.EInvalid('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.EInvalid('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.EInvalid('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.EBadFileDescriptor('invalid file descriptor'));
|
|
} else if(!_(ofd.flags).contains(O_WRITE)) {
|
|
callback(new Errors.EBadFileDescriptor('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.EBadFileDescriptor('invalid file descriptor'));
|
|
} else if(!_(ofd.flags).contains(O_WRITE)) {
|
|
callback(new Errors.EBadFileDescriptor('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;
|
|
|
|
});
|