dist/modules/fs.js

var PATH = {
    isAbs: path => path.charAt(0) === "/",
    splitPath: filename => {
        var splitPathRe = /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
        return splitPathRe.exec(filename).slice(1)
    },
    normalizeArray: (parts, allowAboveRoot) => {
        var up = 0;
        for (var i = parts.length - 1; i >= 0; i--) {
            var last = parts[i];
            if (last === ".") {
                parts.splice(i, 1)
            } else if (last === "..") {
                parts.splice(i, 1);
                up++
            } else if (up) {
                parts.splice(i, 1);
                up--
            }
        }
        if (allowAboveRoot) {
            for (; up; up--) {
                parts.unshift("..")
            }
        }
        return parts
    },
    normalize: path => {
        var isAbsolute = PATH.isAbs(path),
            trailingSlash = path.slice(-1) === "/";
        path = PATH.normalizeArray(path.split("/").filter(p => !!p), !isAbsolute).join("/");
        if (!path && !isAbsolute) {
            path = "."
        }
        if (path && trailingSlash) {
            path += "/"
        }
        return (isAbsolute ? "/" : "") + path
    },
    dirname: path => {
        var result = PATH.splitPath(path),
            root = result[0],
            dir = result[1];
        if (!root && !dir) {
            return "."
        }
        if (dir) {
            dir = dir.slice(0, -1)
        }
        return root + dir
    },
    basename: path => path && path.match(/([^\/]+|\/)\/*$/)[1],
    join: (...paths) => PATH.normalize(paths.join("/")),
    join2: (l, r) => PATH.normalize(l + "/" + r)
};
var initRandomFill = () => {
    if (ENVIRONMENT_IS_NODE) {
        var nodeCrypto = require("crypto");
        return view => nodeCrypto.randomFillSync(view)
    }
    return view => crypto.getRandomValues(view)
};
var randomFill = view => {
    (randomFill = initRandomFill())(view)
};
var PATH_FS = {
    resolve: (...args) => {
        var resolvedPath = "",
            resolvedAbsolute = false;
        for (var i = args.length - 1; i >= -1 && !resolvedAbsolute; i--) {
            var path = i >= 0 ? args[i] : FS.cwd();
            if (typeof path != "string") {
                throw new TypeError("Arguments to path.resolve must be strings")
            } else if (!path) {
                return ""
            }
            resolvedPath = path + "/" + resolvedPath;
            resolvedAbsolute = PATH.isAbs(path)
        }
        resolvedPath = PATH.normalizeArray(resolvedPath.split("/").filter(p => !!p), !resolvedAbsolute).join("/");
        return (resolvedAbsolute ? "/" : "") + resolvedPath || "."
    },
    relative: (from, to) => {
        from = PATH_FS.resolve(from).slice(1);
        to = PATH_FS.resolve(to).slice(1);

        function trim(arr) {
            var start = 0;
            for (; start < arr.length; start++) {
                if (arr[start] !== "") break
            }
            var end = arr.length - 1;
            for (; end >= 0; end--) {
                if (arr[end] !== "") break
            }
            if (start > end) return [];
            return arr.slice(start, end - start + 1)
        }
        var fromParts = trim(from.split("/"));
        var toParts = trim(to.split("/"));
        var length = Math.min(fromParts.length, toParts.length);
        var samePartsLength = length;
        for (var i = 0; i < length; i++) {
            if (fromParts[i] !== toParts[i]) {
                samePartsLength = i;
                break
            }
        }
        var outputParts = [];
        for (var i = samePartsLength; i < fromParts.length; i++) {
            outputParts.push("..")
        }
        outputParts = outputParts.concat(toParts.slice(samePartsLength));
        return outputParts.join("/")
    }
};
var UTF8Decoder = new TextDecoder;
var findStringEnd = (heapOrArray, idx, maxBytesToRead, ignoreNul) => {
    var maxIdx = idx + maxBytesToRead;
    if (ignoreNul) return maxIdx;
    while (heapOrArray[idx] && !(idx >= maxIdx)) ++idx;
    return idx
};
var UTF8ArrayToString = (heapOrArray, idx = 0, maxBytesToRead, ignoreNul) => {
    var endPtr = findStringEnd(heapOrArray, idx, maxBytesToRead, ignoreNul);
    return UTF8Decoder.decode(heapOrArray.buffer ? heapOrArray.subarray(idx, endPtr) : new Uint8Array(heapOrArray.slice(idx, endPtr)))
};
var FS_stdin_getChar_buffer = [];
var lengthBytesUTF8 = str => {
    var len = 0;
    for (var i = 0; i < str.length; ++i) {
        var c = str.charCodeAt(i);
        if (c <= 127) {
            len++
        } else if (c <= 2047) {
            len += 2
        } else if (c >= 55296 && c <= 57343) {
            len += 4;
            ++i
        } else {
            len += 3
        }
    }
    return len
};
var stringToUTF8Array = (str, heap, outIdx, maxBytesToWrite) => {
    if (!(maxBytesToWrite > 0)) return 0;
    var startIdx = outIdx;
    var endIdx = outIdx + maxBytesToWrite - 1;
    for (var i = 0; i < str.length; ++i) {
        var u = str.codePointAt(i);
        if (u <= 127) {
            if (outIdx >= endIdx) break;
            heap[outIdx++] = u
        } else if (u <= 2047) {
            if (outIdx + 1 >= endIdx) break;
            heap[outIdx++] = 192 | u >> 6;
            heap[outIdx++] = 128 | u & 63
        } else if (u <= 65535) {
            if (outIdx + 2 >= endIdx) break;
            heap[outIdx++] = 224 | u >> 12;
            heap[outIdx++] = 128 | u >> 6 & 63;
            heap[outIdx++] = 128 | u & 63
        } else {
            if (outIdx + 3 >= endIdx) break;
            heap[outIdx++] = 240 | u >> 18;
            heap[outIdx++] = 128 | u >> 12 & 63;
            heap[outIdx++] = 128 | u >> 6 & 63;
            heap[outIdx++] = 128 | u & 63;
            i++
        }
    }
    heap[outIdx] = 0;
    return outIdx - startIdx
};
var intArrayFromString = (stringy, dontAddNull, length) => {
    var len = length > 0 ? length : lengthBytesUTF8(stringy) + 1;
    var u8array = new Array(len);
    var numBytesWritten = stringToUTF8Array(stringy, u8array, 0, u8array.length);
    if (dontAddNull) u8array.length = numBytesWritten;
    return u8array
};
var FS_stdin_getChar = () => {
    if (!FS_stdin_getChar_buffer.length) {
        var result = null;
        if (ENVIRONMENT_IS_NODE) {
            var BUFSIZE = 256;
            var buf = Buffer.alloc(BUFSIZE);
            var bytesRead = 0;
            var fd = process.stdin.fd;
            try {
                bytesRead = fs.readSync(fd, buf, 0, BUFSIZE)
            } catch (e) {
                if (e.toString().includes("EOF")) bytesRead = 0;
                else throw e
            }
            if (bytesRead > 0) {
                result = buf.slice(0, bytesRead).toString("utf-8")
            }
        } else if (globalThis.window?.prompt) {
            result = window.prompt("Input: ");
            if (result !== null) {
                result += "\n"
            }
        } else {}
        if (!result) {
            return null
        }
        FS_stdin_getChar_buffer = intArrayFromString(result, true)
    }
    return FS_stdin_getChar_buffer.shift()
};
var TTY = {
    ttys: [],
    init() {},
    shutdown() {},
    register(dev, ops) {
        TTY.ttys[dev] = {
            input: [],
            output: [],
            ops
        };
        FS.registerDevice(dev, TTY.stream_ops)
    },
    stream_ops: {
        open(stream) {
            var tty = TTY.ttys[stream.node.rdev];
            if (!tty) {
                throw new FS.ErrnoError(43)
            }
            stream.tty = tty;
            stream.seekable = false
        },
        close(stream) {
            stream.tty.ops.fsync(stream.tty)
        },
        fsync(stream) {
            stream.tty.ops.fsync(stream.tty)
        },
        read(stream, buffer, offset, length, pos) {
            if (!stream.tty || !stream.tty.ops.get_char) {
                throw new FS.ErrnoError(60)
            }
            var bytesRead = 0;
            for (var i = 0; i < length; i++) {
                var result;
                try {
                    result = stream.tty.ops.get_char(stream.tty)
                } catch (e) {
                    throw new FS.ErrnoError(29)
                }
                if (result === undefined && bytesRead === 0) {
                    throw new FS.ErrnoError(6)
                }
                if (result === null || result === undefined) break;
                bytesRead++;
                buffer[offset + i] = result
            }
            if (bytesRead) {
                stream.node.atime = Date.now()
            }
            return bytesRead
        },
        write(stream, buffer, offset, length, pos) {
            if (!stream.tty || !stream.tty.ops.put_char) {
                throw new FS.ErrnoError(60)
            }
            try {
                for (var i = 0; i < length; i++) {
                    stream.tty.ops.put_char(stream.tty, buffer[offset + i])
                }
            } catch (e) {
                throw new FS.ErrnoError(29)
            }
            if (length) {
                stream.node.mtime = stream.node.ctime = Date.now()
            }
            return i
        }
    },
    default_tty_ops: {
        get_char(tty) {
            return FS_stdin_getChar()
        },
        put_char(tty, val) {
            if (val === null || val === 10) {
                out(UTF8ArrayToString(tty.output));
                tty.output = []
            } else {
                if (val != 0) tty.output.push(val)
            }
        },
        fsync(tty) {
            if (tty.output?.length > 0) {
                out(UTF8ArrayToString(tty.output));
                tty.output = []
            }
        },
        ioctl_tcgets(tty) {
            return {
                c_iflag: 25856,
                c_oflag: 5,
                c_cflag: 191,
                c_lflag: 35387,
                c_cc: [3, 28, 127, 21, 4, 0, 1, 0, 17, 19, 26, 0, 18, 15, 23, 22, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
            }
        },
        ioctl_tcsets(tty, optional_actions, data) {
            return 0
        },
        ioctl_tiocgwinsz(tty) {
            return [24, 80]
        }
    },
    default_tty1_ops: {
        put_char(tty, val) {
            if (val === null || val === 10) {
                err(UTF8ArrayToString(tty.output));
                tty.output = []
            } else {
                if (val != 0) tty.output.push(val)
            }
        },
        fsync(tty) {
            if (tty.output?.length > 0) {
                err(UTF8ArrayToString(tty.output));
                tty.output = []
            }
        }
    }
};
var mmapAlloc = size => {
    abort()
};
var MEMFS = {
    ops_table: null,
    mount(mount) {
        return MEMFS.createNode(null, "/", 16895, 0)
    },
    createNode(parent, name, mode, dev) {
        if (FS.isBlkdev(mode) || FS.isFIFO(mode)) {
            throw new FS.ErrnoError(63)
        }
        MEMFS.ops_table ||= {
            dir: {
                node: {
                    getattr: MEMFS.node_ops.getattr,
                    setattr: MEMFS.node_ops.setattr,
                    lookup: MEMFS.node_ops.lookup,
                    mknod: MEMFS.node_ops.mknod,
                    rename: MEMFS.node_ops.rename,
                    unlink: MEMFS.node_ops.unlink,
                    rmdir: MEMFS.node_ops.rmdir,
                    readdir: MEMFS.node_ops.readdir,
                    symlink: MEMFS.node_ops.symlink
                },
                stream: {
                    llseek: MEMFS.stream_ops.llseek
                }
            },
            file: {
                node: {
                    getattr: MEMFS.node_ops.getattr,
                    setattr: MEMFS.node_ops.setattr
                },
                stream: {
                    llseek: MEMFS.stream_ops.llseek,
                    read: MEMFS.stream_ops.read,
                    write: MEMFS.stream_ops.write,
                    mmap: MEMFS.stream_ops.mmap,
                    msync: MEMFS.stream_ops.msync
                }
            },
            link: {
                node: {
                    getattr: MEMFS.node_ops.getattr,
                    setattr: MEMFS.node_ops.setattr,
                    readlink: MEMFS.node_ops.readlink
                },
                stream: {}
            },
            chrdev: {
                node: {
                    getattr: MEMFS.node_ops.getattr,
                    setattr: MEMFS.node_ops.setattr
                },
                stream: FS.chrdev_stream_ops
            }
        };
        var node = FS.createNode(parent, name, mode, dev);
        if (FS.isDir(node.mode)) {
            node.node_ops = MEMFS.ops_table.dir.node;
            node.stream_ops = MEMFS.ops_table.dir.stream;
            node.contents = {}
        } else if (FS.isFile(node.mode)) {
            node.node_ops = MEMFS.ops_table.file.node;
            node.stream_ops = MEMFS.ops_table.file.stream;
            node.usedBytes = 0;
            node.contents = null
        } else if (FS.isLink(node.mode)) {
            node.node_ops = MEMFS.ops_table.link.node;
            node.stream_ops = MEMFS.ops_table.link.stream
        } else if (FS.isChrdev(node.mode)) {
            node.node_ops = MEMFS.ops_table.chrdev.node;
            node.stream_ops = MEMFS.ops_table.chrdev.stream
        }
        node.atime = node.mtime = node.ctime = Date.now();
        if (parent) {
            parent.contents[name] = node;
            parent.atime = parent.mtime = parent.ctime = node.atime
        }
        return node
    },
    getFileDataAsTypedArray(node) {
        if (!node.contents) return new Uint8Array(0);
        if (node.contents.subarray) return node.contents.subarray(0, node.usedBytes);
        return new Uint8Array(node.contents)
    },
    expandFileStorage(node, newCapacity) {
        var prevCapacity = node.contents ? node.contents.length : 0;
        if (prevCapacity >= newCapacity) return;
        var CAPACITY_DOUBLING_MAX = 1024 * 1024;
        newCapacity = Math.max(newCapacity, prevCapacity * (prevCapacity < CAPACITY_DOUBLING_MAX ? 2 : 1.125) >>> 0);
        if (prevCapacity != 0) newCapacity = Math.max(newCapacity, 256);
        var oldContents = node.contents;
        node.contents = new Uint8Array(newCapacity);
        if (node.usedBytes > 0) node.contents.set(oldContents.subarray(0, node.usedBytes), 0)
    },
    resizeFileStorage(node, newSize) {
        if (node.usedBytes == newSize) return;
        if (newSize == 0) {
            node.contents = null;
            node.usedBytes = 0
        } else {
            var oldContents = node.contents;
            node.contents = new Uint8Array(newSize);
            if (oldContents) {
                node.contents.set(oldContents.subarray(0, Math.min(newSize, node.usedBytes)))
            }
            node.usedBytes = newSize
        }
    },
    node_ops: {
        getattr(node) {
            var attr = {};
            attr.dev = FS.isChrdev(node.mode) ? node.id : 1;
            attr.ino = node.id;
            attr.mode = node.mode;
            attr.nlink = 1;
            attr.uid = 0;
            attr.gid = 0;
            attr.rdev = node.rdev;
            if (FS.isDir(node.mode)) {
                attr.size = 4096
            } else if (FS.isFile(node.mode)) {
                attr.size = node.usedBytes
            } else if (FS.isLink(node.mode)) {
                attr.size = node.link.length
            } else {
                attr.size = 0
            }
            attr.atime = new Date(node.atime);
            attr.mtime = new Date(node.mtime);
            attr.ctime = new Date(node.ctime);
            attr.blksize = 4096;
            attr.blocks = Math.ceil(attr.size / attr.blksize);
            return attr
        },
        setattr(node, attr) {
            for (const key of ["mode", "atime", "mtime", "ctime"]) {
                if (attr[key] != null) {
                    node[key] = attr[key]
                }
            }
            if (attr.size !== undefined) {
                MEMFS.resizeFileStorage(node, attr.size)
            }
        },
        lookup(parent, name) {
            if (!MEMFS.doesNotExistError) {
                MEMFS.doesNotExistError = new FS.ErrnoError(44);
                MEMFS.doesNotExistError.stack = "<generic error, no stack>"
            }
            throw MEMFS.doesNotExistError
        },
        mknod(parent, name, mode, dev) {
            return MEMFS.createNode(parent, name, mode, dev)
        },
        rename(old_node, new_dir, new_name) {
            var new_node;
            try {
                new_node = FS.lookupNode(new_dir, new_name)
            } catch (e) {}
            if (new_node) {
                if (FS.isDir(old_node.mode)) {
                    for (var i in new_node.contents) {
                        throw new FS.ErrnoError(55)
                    }
                }
                FS.hashRemoveNode(new_node)
            }
            delete old_node.parent.contents[old_node.name];
            new_dir.contents[new_name] = old_node;
            old_node.name = new_name;
            new_dir.ctime = new_dir.mtime = old_node.parent.ctime = old_node.parent.mtime = Date.now()
        },
        unlink(parent, name) {
            delete parent.contents[name];
            parent.ctime = parent.mtime = Date.now()
        },
        rmdir(parent, name) {
            var node = FS.lookupNode(parent, name);
            for (var i in node.contents) {
                throw new FS.ErrnoError(55)
            }
            delete parent.contents[name];
            parent.ctime = parent.mtime = Date.now()
        },
        readdir(node) {
            return [".", "..", ...Object.keys(node.contents)]
        },
        symlink(parent, newname, oldpath) {
            var node = MEMFS.createNode(parent, newname, 511 | 40960, 0);
            node.link = oldpath;
            return node
        },
        readlink(node) {
            if (!FS.isLink(node.mode)) {
                throw new FS.ErrnoError(28)
            }
            return node.link
        }
    },
    stream_ops: {
        read(stream, buffer, offset, length, position) {
            var contents = stream.node.contents;
            if (position >= stream.node.usedBytes) return 0;
            var size = Math.min(stream.node.usedBytes - position, length);
            if (size > 8 && contents.subarray) {
                buffer.set(contents.subarray(position, position + size), offset)
            } else {
                for (var i = 0; i < size; i++) buffer[offset + i] = contents[position + i]
            }
            return size
        },
        write(stream, buffer, offset, length, position, canOwn) {
            if (buffer.buffer === HEAP8.buffer) {
                canOwn = false
            }
            if (!length) return 0;
            var node = stream.node;
            node.mtime = node.ctime = Date.now();
            if (buffer.subarray && (!node.contents || node.contents.subarray)) {
                if (canOwn) {
                    node.contents = buffer.subarray(offset, offset + length);
                    node.usedBytes = length;
                    return length
                } else if (node.usedBytes === 0 && position === 0) {
                    node.contents = buffer.slice(offset, offset + length);
                    node.usedBytes = length;
                    return length
                } else if (position + length <= node.usedBytes) {
                    node.contents.set(buffer.subarray(offset, offset + length), position);
                    return length
                }
            }
            MEMFS.expandFileStorage(node, position + length);
            if (node.contents.subarray && buffer.subarray) {
                node.contents.set(buffer.subarray(offset, offset + length), position)
            } else {
                for (var i = 0; i < length; i++) {
                    node.contents[position + i] = buffer[offset + i]
                }
            }
            node.usedBytes = Math.max(node.usedBytes, position + length);
            return length
        },
        llseek(stream, offset, whence) {
            var position = offset;
            if (whence === 1) {
                position += stream.position
            } else if (whence === 2) {
                if (FS.isFile(stream.node.mode)) {
                    position += stream.node.usedBytes
                }
            }
            if (position < 0) {
                throw new FS.ErrnoError(28)
            }
            return position
        },
        mmap(stream, length, position, prot, flags) {
            if (!FS.isFile(stream.node.mode)) {
                throw new FS.ErrnoError(43)
            }
            var ptr;
            var allocated;
            var contents = stream.node.contents;
            if (!(flags & 2) && contents && contents.buffer === HEAP8.buffer) {
                allocated = false;
                ptr = contents.byteOffset
            } else {
                allocated = true;
                ptr = mmapAlloc(length);
                if (!ptr) {
                    throw new FS.ErrnoError(48)
                }
                if (contents) {
                    if (position > 0 || position + length < contents.length) {
                        if (contents.subarray) {
                            contents = contents.subarray(position, position + length)
                        } else {
                            contents = Array.prototype.slice.call(contents, position, position + length)
                        }
                    }
                    HEAP8.set(contents, ptr)
                }
            }
            return {
                ptr,
                allocated
            }
        },
        msync(stream, buffer, offset, length, mmapFlags) {
            MEMFS.stream_ops.write(stream, buffer, 0, length, offset, false);
            return 0
        }
    }
};
var FS_modeStringToFlags = str => {
    var flagModes = {
        r: 0,
        "r+": 2,
        w: 512 | 64 | 1,
        "w+": 512 | 64 | 2,
        a: 1024 | 64 | 1,
        "a+": 1024 | 64 | 2
    };
    var flags = flagModes[str];
    if (typeof flags == "undefined") {
        throw new Error(`Unknown file open mode: ${str}`)
    }
    return flags
};
var FS_getMode = (canRead, canWrite) => {
    var mode = 0;
    if (canRead) mode |= 292 | 73;
    if (canWrite) mode |= 146;
    return mode
};
var IDBFS = {
    dbs: {},
    indexedDB: () => indexedDB,
    DB_VERSION: 21,
    DB_STORE_NAME: "FILE_DATA",
    queuePersist: mount => {
        function onPersistComplete() {
            if (mount.idbPersistState === "again") startPersist();
            else mount.idbPersistState = 0
        }

        function startPersist() {
            mount.idbPersistState = "idb";
            IDBFS.syncfs(mount, false, onPersistComplete)
        }
        if (!mount.idbPersistState) {
            mount.idbPersistState = setTimeout(startPersist, 0)
        } else if (mount.idbPersistState === "idb") {
            mount.idbPersistState = "again"
        }
    },
    mount: mount => {
        var mnt = MEMFS.mount(mount);
        if (mount?.opts?.autoPersist) {
            mount.idbPersistState = 0;
            var memfs_node_ops = mnt.node_ops;
            mnt.node_ops = {
                ...mnt.node_ops
            };
            mnt.node_ops.mknod = (parent, name, mode, dev) => {
                var node = memfs_node_ops.mknod(parent, name, mode, dev);
                node.node_ops = mnt.node_ops;
                node.idbfs_mount = mnt.mount;
                node.memfs_stream_ops = node.stream_ops;
                node.stream_ops = {
                    ...node.stream_ops
                };
                node.stream_ops.write = (stream, buffer, offset, length, position, canOwn) => {
                    stream.node.isModified = true;
                    return node.memfs_stream_ops.write(stream, buffer, offset, length, position, canOwn)
                };
                node.stream_ops.close = stream => {
                    var n = stream.node;
                    if (n.isModified) {
                        IDBFS.queuePersist(n.idbfs_mount);
                        n.isModified = false
                    }
                    if (n.memfs_stream_ops.close) return n.memfs_stream_ops.close(stream)
                };
                IDBFS.queuePersist(mnt.mount);
                return node
            };
            mnt.node_ops.rmdir = (...args) => (IDBFS.queuePersist(mnt.mount), memfs_node_ops.rmdir(...args));
            mnt.node_ops.symlink = (...args) => (IDBFS.queuePersist(mnt.mount), memfs_node_ops.symlink(...args));
            mnt.node_ops.unlink = (...args) => (IDBFS.queuePersist(mnt.mount), memfs_node_ops.unlink(...args));
            mnt.node_ops.rename = (...args) => (IDBFS.queuePersist(mnt.mount), memfs_node_ops.rename(...args))
        }
        return mnt
    },
    syncfs: (mount, populate, callback) => {
        const fn = callback => {
            IDBFS.getLocalSet(mount, (err, local) => {
                if (err) return callback(err);
                IDBFS.getRemoteSet(mount, (err, remote) => {
                    if (err) return callback(err);
                    var src = populate ? remote : local;
                    var dst = populate ? local : remote;
                    IDBFS.reconcile(src, dst, callback)
                })
            })
        };

        if (window.syncfs !== undefined)
            window.syncfs(IDBFS, mount, populate, callback, fn);
        else
            fn(callback);
    },
    quit: () => {
        for (var value of Object.values(IDBFS.dbs)) {
            value.close()
        }
        IDBFS.dbs = {}
    },
    getDB: (name, callback) => {
        var db = IDBFS.dbs[name];
        if (db) {
            return callback(null, db)
        }
        var req;
        try {
            req = IDBFS.indexedDB().open(name, IDBFS.DB_VERSION)
        } catch (e) {
            return callback(e)
        }
        if (!req) {
            return callback("Unable to connect to IndexedDB")
        }
        req.onupgradeneeded = e => {
            var db = e.target.result;
            var transaction = e.target.transaction;
            var fileStore;
            if (db.objectStoreNames.contains(IDBFS.DB_STORE_NAME)) {
                fileStore = transaction.objectStore(IDBFS.DB_STORE_NAME)
            } else {
                fileStore = db.createObjectStore(IDBFS.DB_STORE_NAME)
            }
            if (!fileStore.indexNames.contains("timestamp")) {
                fileStore.createIndex("timestamp", "timestamp", {
                    unique: false
                })
            }
        };
        req.onsuccess = () => {
            db = req.result;
            IDBFS.dbs[name] = db;
            callback(null, db)
        };
        req.onerror = e => {
            callback(e.target.error);
            e.preventDefault()
        }
    },
    getLocalSet: (mount, callback) => {
        var entries = {};

        function isRealDir(p) {
            return p !== "." && p !== ".."
        }

        function toAbsolute(root) {
            return p => PATH.join2(root, p)
        }
        var check = FS.readdir(mount.mountpoint).filter(isRealDir).map(toAbsolute(mount.mountpoint));
        while (check.length) {
            var path = check.pop();
            var stat;
            try {
                stat = FS.stat(path)
            } catch (e) {
                return callback(e)
            }
            if (FS.isDir(stat.mode)) {
                check.push(...FS.readdir(path).filter(isRealDir).map(toAbsolute(path)))
            }
            entries[path] = {
                timestamp: stat.mtime
            }
        }
        return callback(null, {
            type: "local",
            entries
        })
    },
    getRemoteSet: (mount, callback) => {
        var entries = {};
        IDBFS.getDB(mount.mountpoint, (err, db) => {
            if (err) return callback(err);
            try {
                var transaction = db.transaction([IDBFS.DB_STORE_NAME], "readonly");
                transaction.onerror = e => {
                    callback(e.target.error);
                    e.preventDefault()
                };
                var store = transaction.objectStore(IDBFS.DB_STORE_NAME);
                var index = store.index("timestamp");
                index.openKeyCursor().onsuccess = event => {
                    var cursor = event.target.result;
                    if (!cursor) {
                        return callback(null, {
                            type: "remote",
                            db,
                            entries
                        })
                    }
                    entries[cursor.primaryKey] = {
                        timestamp: cursor.key
                    };
                    cursor.continue()
                }
            } catch (e) {
                return callback(e)
            }
        })
    },
    loadLocalEntry: (path, callback) => {
        var stat, node;
        try {
            var lookup = FS.lookupPath(path);
            node = lookup.node;
            stat = FS.stat(path)
        } catch (e) {
            return callback(e)
        }
        if (FS.isDir(stat.mode)) {
            return callback(null, {
                timestamp: stat.mtime,
                mode: stat.mode
            })
        } else if (FS.isFile(stat.mode)) {
            node.contents = MEMFS.getFileDataAsTypedArray(node);
            return callback(null, {
                timestamp: stat.mtime,
                mode: stat.mode,
                contents: node.contents
            })
        } else {
            return callback(new Error("node type not supported"))
        }
    },
    storeLocalEntry: (path, entry, callback) => {
        try {
            if (FS.isDir(entry["mode"])) {
                FS.mkdirTree(path, entry["mode"])
            } else if (FS.isFile(entry["mode"])) {
                FS.writeFile(path, entry["contents"], {
                    canOwn: true
                })
            } else {
                return callback(new Error("node type not supported"))
            }
            FS.chmod(path, entry["mode"]);
            FS.utime(path, entry["timestamp"], entry["timestamp"])
        } catch (e) {
            return callback(e)
        }
        callback(null)
    },
    removeLocalEntry: (path, callback) => {
        try {
            var stat = FS.stat(path);
            if (FS.isDir(stat.mode)) {
                FS.rmdir(path)
            } else if (FS.isFile(stat.mode)) {
                FS.unlink(path)
            }
        } catch (e) {
            return callback(e)
        }
        callback(null)
    },
    loadRemoteEntry: (store, path, callback) => {
        var req = store.get(path);
        req.onsuccess = event => callback(null, event.target.result);
        req.onerror = e => {
            callback(e.target.error);
            e.preventDefault()
        }
    },
    storeRemoteEntry: (store, path, entry, callback) => {
        try {
            var req = store.put(entry, path)
        } catch (e) {
            callback(e);
            return
        }
        req.onsuccess = event => callback();
        req.onerror = e => {
            callback(e.target.error);
            e.preventDefault()
        }
    },
    removeRemoteEntry: (store, path, callback) => {
        var req = store.delete(path);
        req.onsuccess = event => callback();
        req.onerror = e => {
            callback(e.target.error);
            e.preventDefault()
        }
    },
    reconcile: (src, dst, callback) => {
        var total = 0;
        var create = [];
        for (var [key, e] of Object.entries(src.entries)) {
            var e2 = dst.entries[key];
            if (!e2 || e["timestamp"].getTime() != e2["timestamp"].getTime()) {
                create.push(key);
                total++
            }
        }
        var remove = [];
        for (var key of Object.keys(dst.entries)) {
            if (!src.entries[key]) {
                remove.push(key);
                total++
            }
        }
        if (!total) {
            return callback(null)
        }
        var errored = false;
        var db = src.type === "remote" ? src.db : dst.db;
        var transaction = db.transaction([IDBFS.DB_STORE_NAME], "readwrite");
        var store = transaction.objectStore(IDBFS.DB_STORE_NAME);

        function done(err) {
            if (err && !errored) {
                errored = true;
                return callback(err)
            }
        }
        transaction.onerror = transaction.onabort = e => {
            done(e.target.error);
            e.preventDefault()
        };
        transaction.oncomplete = e => {
            if (!errored) {
                callback(null)
            }
        };
        for (const path of create.sort()) {
            if (dst.type === "local") {
                IDBFS.loadRemoteEntry(store, path, (err, entry) => {
                    if (err) return done(err);
                    IDBFS.storeLocalEntry(path, entry, done)
                })
            } else {
                IDBFS.loadLocalEntry(path, (err, entry) => {
                    if (err) return done(err);
                    IDBFS.storeRemoteEntry(store, path, entry, done)
                })
            }
        }
        for (var path of remove.sort().reverse()) {
            if (dst.type === "local") {
                IDBFS.removeLocalEntry(path, done)
            } else {
                IDBFS.removeRemoteEntry(store, path, done)
            }
        }
    }
};
var asyncLoad = async url => {
    var arrayBuffer = await readAsync(url);
    return new Uint8Array(arrayBuffer)
};
var FS_createDataFile = (...args) => FS.createDataFile(...args);
var getUniqueRunDependency = id => id;
var preloadPlugins = [];
var FS_handledByPreloadPlugin = async (byteArray, fullname) => {
    if (typeof Browser != "undefined") Browser.init();
    for (var plugin of preloadPlugins) {
        if (plugin["canHandle"](fullname)) {
            return plugin["handle"](byteArray, fullname)
        }
    }
    return byteArray
};
var FS_preloadFile = async (parent, name, url, canRead, canWrite, dontCreateFile, canOwn, preFinish) => {
    var fullname = name ? PATH_FS.resolve(PATH.join2(parent, name)) : parent;
    var dep = getUniqueRunDependency(`cp ${fullname}`);
    addRunDependency(dep);
    try {
        var byteArray = url;
        if (typeof url == "string") {
            byteArray = await asyncLoad(url)
        }
        byteArray = await FS_handledByPreloadPlugin(byteArray, fullname);
        preFinish?.();
        if (!dontCreateFile) {
            FS_createDataFile(parent, name, byteArray, canRead, canWrite, canOwn)
        }
    } finally {
        removeRunDependency(dep)
    }
};
var FS_createPreloadedFile = (parent, name, url, canRead, canWrite, onload, onerror, dontCreateFile, canOwn, preFinish) => {
    FS_preloadFile(parent, name, url, canRead, canWrite, dontCreateFile, canOwn, preFinish).then(onload).catch(onerror)
};
var FS = {
    root: null,
    mounts: [],
    devices: {},
    streams: [],
    nextInode: 1,
    nameTable: null,
    currentPath: "/",
    initialized: false,
    ignorePermissions: true,
    filesystems: null,
    syncFSRequests: 0,
    readFiles: {},
    ErrnoError: class {
        name = "ErrnoError";
        constructor(errno) {
            this.errno = errno
        }
    },
    FSStream: class {
        shared = {};
        get object() {
            return this.node
        }
        set object(val) {
            this.node = val
        }
        get isRead() {
            return (this.flags & 2097155) !== 1
        }
        get isWrite() {
            return (this.flags & 2097155) !== 0
        }
        get isAppend() {
            return this.flags & 1024
        }
        get flags() {
            return this.shared.flags
        }
        set flags(val) {
            this.shared.flags = val
        }
        get position() {
            return this.shared.position
        }
        set position(val) {
            this.shared.position = val
        }
    },
    FSNode: class {
        node_ops = {};
        stream_ops = {};
        readMode = 292 | 73;
        writeMode = 146;
        mounted = null;
        constructor(parent, name, mode, rdev) {
            if (!parent) {
                parent = this
            }
            this.parent = parent;
            this.mount = parent.mount;
            this.id = FS.nextInode++;
            this.name = name;
            this.mode = mode;
            this.rdev = rdev;
            this.atime = this.mtime = this.ctime = Date.now()
        }
        get read() {
            return (this.mode & this.readMode) === this.readMode
        }
        set read(val) {
            val ? this.mode |= this.readMode : this.mode &= ~this.readMode
        }
        get write() {
            return (this.mode & this.writeMode) === this.writeMode
        }
        set write(val) {
            val ? this.mode |= this.writeMode : this.mode &= ~this.writeMode
        }
        get isFolder() {
            return FS.isDir(this.mode)
        }
        get isDevice() {
            return FS.isChrdev(this.mode)
        }
    },
    lookupPath(path, opts = {}) {
        if (!path) {
            throw new FS.ErrnoError(44)
        }
        opts.follow_mount ??= true;
        if (!PATH.isAbs(path)) {
            path = FS.cwd() + "/" + path
        }
        linkloop: for (var nlinks = 0; nlinks < 40; nlinks++) {
            var parts = path.split("/").filter(p => !!p);
            var current = FS.root;
            var current_path = "/";
            for (var i = 0; i < parts.length; i++) {
                var islast = i === parts.length - 1;
                if (islast && opts.parent) {
                    break
                }
                if (parts[i] === ".") {
                    continue
                }
                if (parts[i] === "..") {
                    current_path = PATH.dirname(current_path);
                    if (FS.isRoot(current)) {
                        path = current_path + "/" + parts.slice(i + 1).join("/");
                        nlinks--;
                        continue linkloop
                    } else {
                        current = current.parent
                    }
                    continue
                }
                current_path = PATH.join2(current_path, parts[i]);
                try {
                    current = FS.lookupNode(current, parts[i])
                } catch (e) {
                    if (e?.errno === 44 && islast && opts.noent_okay) {
                        return {
                            path: current_path
                        }
                    }
                    throw e
                }
                if (FS.isMountpoint(current) && (!islast || opts.follow_mount)) {
                    current = current.mounted.root
                }
                if (FS.isLink(current.mode) && (!islast || opts.follow)) {
                    if (!current.node_ops.readlink) {
                        throw new FS.ErrnoError(52)
                    }
                    var link = current.node_ops.readlink(current);
                    if (!PATH.isAbs(link)) {
                        link = PATH.dirname(current_path) + "/" + link
                    }
                    path = link + "/" + parts.slice(i + 1).join("/");
                    continue linkloop
                }
            }
            return {
                path: current_path,
                node: current
            }
        }
        throw new FS.ErrnoError(32)
    },
    getPath(node) {
        var path;
        while (true) {
            if (FS.isRoot(node)) {
                var mount = node.mount.mountpoint;
                if (!path) return mount;
                return mount[mount.length - 1] !== "/" ? `${mount}/${path}` : mount + path
            }
            path = path ? `${node.name}/${path}` : node.name;
            node = node.parent
        }
    },
    hashName(parentid, name) {
        var hash = 0;
        name = name.toLowerCase();
        for (var i = 0; i < name.length; i++) {
            hash = (hash << 5) - hash + name.charCodeAt(i) | 0
        }
        return (parentid + hash >>> 0) % FS.nameTable.length
    },
    hashAddNode(node) {
        var hash = FS.hashName(node.parent.id, node.name);
        node.name_next = FS.nameTable[hash];
        FS.nameTable[hash] = node
    },
    hashRemoveNode(node) {
        var hash = FS.hashName(node.parent.id, node.name);
        if (FS.nameTable[hash] === node) {
            FS.nameTable[hash] = node.name_next
        } else {
            var current = FS.nameTable[hash];
            while (current) {
                if (current.name_next === node) {
                    current.name_next = node.name_next;
                    break
                }
                current = current.name_next
            }
        }
    },
    lookupNode(parent, name) {
        var errCode = FS.mayLookup(parent);
        if (errCode) {
            throw new FS.ErrnoError(errCode)
        }
        var hash = FS.hashName(parent.id, name);
        name = name.toLowerCase();
        for (var node = FS.nameTable[hash]; node; node = node.name_next) {
            var nodeName = node.name;
            nodeName = nodeName.toLowerCase();
            if (node.parent.id === parent.id && nodeName === name) {
                return node
            }
        }
        return FS.lookup(parent, name)
    },
    createNode(parent, name, mode, rdev) {
        var node = new FS.FSNode(parent, name, mode, rdev);
        FS.hashAddNode(node);
        return node
    },
    destroyNode(node) {
        FS.hashRemoveNode(node)
    },
    isRoot(node) {
        return node === node.parent
    },
    isMountpoint(node) {
        return !!node.mounted
    },
    isFile(mode) {
        return (mode & 61440) === 32768
    },
    isDir(mode) {
        return (mode & 61440) === 16384
    },
    isLink(mode) {
        return (mode & 61440) === 40960
    },
    isChrdev(mode) {
        return (mode & 61440) === 8192
    },
    isBlkdev(mode) {
        return (mode & 61440) === 24576
    },
    isFIFO(mode) {
        return (mode & 61440) === 4096
    },
    isSocket(mode) {
        return (mode & 49152) === 49152
    },
    flagsToPermissionString(flag) {
        var perms = ["r", "w", "rw"][flag & 3];
        if (flag & 512) {
            perms += "w"
        }
        return perms
    },
    nodePermissions(node, perms) {
        if (FS.ignorePermissions) {
            return 0
        }
        if (perms.includes("r") && !(node.mode & 292)) {
            return 2
        } else if (perms.includes("w") && !(node.mode & 146)) {
            return 2
        } else if (perms.includes("x") && !(node.mode & 73)) {
            return 2
        }
        return 0
    },
    mayLookup(dir) {
        if (!FS.isDir(dir.mode)) return 54;
        var errCode = FS.nodePermissions(dir, "x");
        if (errCode) return errCode;
        if (!dir.node_ops.lookup) return 2;
        return 0
    },
    mayCreate(dir, name) {
        if (!FS.isDir(dir.mode)) {
            return 54
        }
        try {
            var node = FS.lookupNode(dir, name);
            return 20
        } catch (e) {}
        return FS.nodePermissions(dir, "wx")
    },
    mayDelete(dir, name, isdir) {
        var node;
        try {
            node = FS.lookupNode(dir, name)
        } catch (e) {
            return e.errno
        }
        var errCode = FS.nodePermissions(dir, "wx");
        if (errCode) {
            return errCode
        }
        if (isdir) {
            if (!FS.isDir(node.mode)) {
                return 54
            }
            if (FS.isRoot(node) || FS.getPath(node) === FS.cwd()) {
                return 10
            }
        } else {
            if (FS.isDir(node.mode)) {
                return 31
            }
        }
        return 0
    },
    mayOpen(node, flags) {
        if (!node) {
            return 44
        }
        if (FS.isLink(node.mode)) {
            return 32
        } else if (FS.isDir(node.mode)) {
            if (FS.flagsToPermissionString(flags) !== "r" || flags & (512 | 64)) {
                return 31
            }
        }
        return FS.nodePermissions(node, FS.flagsToPermissionString(flags))
    },
    checkOpExists(op, err) {
        if (!op) {
            throw new FS.ErrnoError(err)
        }
        return op
    },
    MAX_OPEN_FDS: 4096,
    nextfd() {
        for (var fd = 0; fd <= FS.MAX_OPEN_FDS; fd++) {
            if (!FS.streams[fd]) {
                return fd
            }
        }
        throw new FS.ErrnoError(33)
    },
    getStreamChecked(fd) {
        var stream = FS.getStream(fd);
        if (!stream) {
            throw new FS.ErrnoError(8)
        }
        return stream
    },
    getStream: fd => FS.streams[fd],
    createStream(stream, fd = -1) {
        stream = Object.assign(new FS.FSStream, stream);
        if (fd == -1) {
            fd = FS.nextfd()
        }
        stream.fd = fd;
        FS.streams[fd] = stream;
        return stream
    },
    closeStream(fd) {
        FS.streams[fd] = null
    },
    dupStream(origStream, fd = -1) {
        var stream = FS.createStream(origStream, fd);
        stream.stream_ops?.dup?.(stream);
        return stream
    },
    doSetAttr(stream, node, attr) {
        var setattr = stream?.stream_ops.setattr;
        var arg = setattr ? stream : node;
        setattr ??= node.node_ops.setattr;
        FS.checkOpExists(setattr, 63);
        setattr(arg, attr)
    },
    chrdev_stream_ops: {
        open(stream) {
            var device = FS.getDevice(stream.node.rdev);
            stream.stream_ops = device.stream_ops;
            stream.stream_ops.open?.(stream)
        },
        llseek() {
            throw new FS.ErrnoError(70)
        }
    },
    major: dev => dev >> 8,
    minor: dev => dev & 255,
    makedev: (ma, mi) => ma << 8 | mi,
    registerDevice(dev, ops) {
        FS.devices[dev] = {
            stream_ops: ops
        }
    },
    getDevice: dev => FS.devices[dev],
    getMounts(mount) {
        var mounts = [];
        var check = [mount];
        while (check.length) {
            var m = check.pop();
            mounts.push(m);
            check.push(...m.mounts)
        }
        return mounts
    },
    syncfs(populate, callback) {
        if (typeof populate == "function") {
            callback = populate;
            populate = false
        }
        FS.syncFSRequests++;
        if (FS.syncFSRequests > 1) {
            err(`warning: ${FS.syncFSRequests} FS.syncfs operations in flight at once, probably just doing extra work`)
        }
        var mounts = FS.getMounts(FS.root.mount);
        var completed = 0;

        function doCallback(errCode) {
            FS.syncFSRequests--;
            return callback(errCode)
        }

        function done(errCode) {
            if (errCode) {
                if (!done.errored) {
                    done.errored = true;
                    return doCallback(errCode)
                }
                return
            }
            if (++completed >= mounts.length) {
                doCallback(null)
            }
        }
        for (var mount of mounts) {
            if (mount.type.syncfs) {
                mount.type.syncfs(mount, populate, done)
            } else {
                done(null)
            }
        }
    },
    mount(type, opts, mountpoint) {
        var root = mountpoint === "/";
        var pseudo = !mountpoint;
        var node;
        if (root && FS.root) {
            throw new FS.ErrnoError(10)
        } else if (!root && !pseudo) {
            var lookup = FS.lookupPath(mountpoint, {
                follow_mount: false
            });
            mountpoint = lookup.path;
            node = lookup.node;
            if (FS.isMountpoint(node)) {
                throw new FS.ErrnoError(10)
            }
            if (!FS.isDir(node.mode)) {
                throw new FS.ErrnoError(54)
            }
        }
        var mount = {
            type,
            opts,
            mountpoint,
            mounts: []
        };
        var mountRoot = type.mount(mount);
        mountRoot.mount = mount;
        mount.root = mountRoot;
        if (root) {
            FS.root = mountRoot
        } else if (node) {
            node.mounted = mount;
            if (node.mount) {
                node.mount.mounts.push(mount)
            }
        }
        return mountRoot
    },
    unmount(mountpoint) {
        var lookup = FS.lookupPath(mountpoint, {
            follow_mount: false
        });
        if (!FS.isMountpoint(lookup.node)) {
            throw new FS.ErrnoError(28)
        }
        var node = lookup.node;
        var mount = node.mounted;
        var mounts = FS.getMounts(mount);
        for (var [hash, current] of Object.entries(FS.nameTable)) {
            while (current) {
                var next = current.name_next;
                if (mounts.includes(current.mount)) {
                    FS.destroyNode(current)
                }
                current = next
            }
        }
        node.mounted = null;
        var idx = node.mount.mounts.indexOf(mount);
        node.mount.mounts.splice(idx, 1)
    },
    lookup(parent, name) {
        return parent.node_ops.lookup(parent, name)
    },
    mknod(path, mode, dev) {
        var lookup = FS.lookupPath(path, {
            parent: true
        });
        var parent = lookup.node;
        var name = PATH.basename(path);
        if (!name) {
            throw new FS.ErrnoError(28)
        }
        if (name === "." || name === "..") {
            throw new FS.ErrnoError(20)
        }
        var errCode = FS.mayCreate(parent, name);
        if (errCode) {
            throw new FS.ErrnoError(errCode)
        }
        if (!parent.node_ops.mknod) {
            throw new FS.ErrnoError(63)
        }
        return parent.node_ops.mknod(parent, name, mode, dev)
    },
    statfs(path) {
        return FS.statfsNode(FS.lookupPath(path, {
            follow: true
        }).node)
    },
    statfsStream(stream) {
        return FS.statfsNode(stream.node)
    },
    statfsNode(node) {
        var rtn = {
            bsize: 4096,
            frsize: 4096,
            blocks: 1e6,
            bfree: 5e5,
            bavail: 5e5,
            files: FS.nextInode,
            ffree: FS.nextInode - 1,
            fsid: 42,
            flags: 2,
            namelen: 255
        };
        if (node.node_ops.statfs) {
            Object.assign(rtn, node.node_ops.statfs(node.mount.opts.root))
        }
        return rtn
    },
    create(path, mode = 438) {
        mode &= 4095;
        mode |= 32768;
        return FS.mknod(path, mode, 0)
    },
    mkdir(path, mode = 511) {
        mode &= 511 | 512;
        mode |= 16384;
        return FS.mknod(path, mode, 0)
    },
    mkdirTree(path, mode) {
        var dirs = path.split("/");
        var d = "";
        for (var dir of dirs) {
            if (!dir) continue;
            if (d || PATH.isAbs(path)) d += "/";
            d += dir;
            try {
                FS.mkdir(d, mode)
            } catch (e) {
                if (e.errno != 20) throw e
            }
        }
    },
    mkdev(path, mode, dev) {
        if (typeof dev == "undefined") {
            dev = mode;
            mode = 438
        }
        mode |= 8192;
        return FS.mknod(path, mode, dev)
    },
    symlink(oldpath, newpath) {
        if (!PATH_FS.resolve(oldpath)) {
            throw new FS.ErrnoError(44)
        }
        var lookup = FS.lookupPath(newpath, {
            parent: true
        });
        var parent = lookup.node;
        if (!parent) {
            throw new FS.ErrnoError(44)
        }
        var newname = PATH.basename(newpath);
        var errCode = FS.mayCreate(parent, newname);
        if (errCode) {
            throw new FS.ErrnoError(errCode)
        }
        if (!parent.node_ops.symlink) {
            throw new FS.ErrnoError(63)
        }
        return parent.node_ops.symlink(parent, newname, oldpath)
    },
    rename(old_path, new_path) {
        var old_dirname = PATH.dirname(old_path);
        var new_dirname = PATH.dirname(new_path);
        var old_name = PATH.basename(old_path);
        var new_name = PATH.basename(new_path);
        var lookup, old_dir, new_dir;
        lookup = FS.lookupPath(old_path, {
            parent: true
        });
        old_dir = lookup.node;
        lookup = FS.lookupPath(new_path, {
            parent: true
        });
        new_dir = lookup.node;
        if (!old_dir || !new_dir) throw new FS.ErrnoError(44);
        if (old_dir.mount !== new_dir.mount) {
            throw new FS.ErrnoError(75)
        }
        var old_node = FS.lookupNode(old_dir, old_name);
        var relative = PATH_FS.relative(old_path, new_dirname);
        if (relative.charAt(0) !== ".") {
            throw new FS.ErrnoError(28)
        }
        relative = PATH_FS.relative(new_path, old_dirname);
        if (relative.charAt(0) !== ".") {
            throw new FS.ErrnoError(55)
        }
        var new_node;
        try {
            new_node = FS.lookupNode(new_dir, new_name)
        } catch (e) {}
        if (old_node === new_node) {
            return
        }
        var isdir = FS.isDir(old_node.mode);
        var errCode = FS.mayDelete(old_dir, old_name, isdir);
        if (errCode) {
            throw new FS.ErrnoError(errCode)
        }
        errCode = new_node ? FS.mayDelete(new_dir, new_name, isdir) : FS.mayCreate(new_dir, new_name);
        if (errCode) {
            throw new FS.ErrnoError(errCode)
        }
        if (!old_dir.node_ops.rename) {
            throw new FS.ErrnoError(63)
        }
        if (FS.isMountpoint(old_node) || new_node && FS.isMountpoint(new_node)) {
            throw new FS.ErrnoError(10)
        }
        if (new_dir !== old_dir) {
            errCode = FS.nodePermissions(old_dir, "w");
            if (errCode) {
                throw new FS.ErrnoError(errCode)
            }
        }
        FS.hashRemoveNode(old_node);
        try {
            old_dir.node_ops.rename(old_node, new_dir, new_name);
            old_node.parent = new_dir
        } catch (e) {
            throw e
        } finally {
            FS.hashAddNode(old_node)
        }
    },
    rmdir(path) {
        var lookup = FS.lookupPath(path, {
            parent: true
        });
        var parent = lookup.node;
        var name = PATH.basename(path);
        var node = FS.lookupNode(parent, name);
        var errCode = FS.mayDelete(parent, name, true);
        if (errCode) {
            throw new FS.ErrnoError(errCode)
        }
        if (!parent.node_ops.rmdir) {
            throw new FS.ErrnoError(63)
        }
        if (FS.isMountpoint(node)) {
            throw new FS.ErrnoError(10)
        }
        parent.node_ops.rmdir(parent, name);
        FS.destroyNode(node)
    },
    readdir(path) {
        var lookup = FS.lookupPath(path, {
            follow: true
        });
        var node = lookup.node;
        var readdir = FS.checkOpExists(node.node_ops.readdir, 54);
        return readdir(node)
    },
    unlink(path) {
        var lookup = FS.lookupPath(path, {
            parent: true
        });
        var parent = lookup.node;
        if (!parent) {
            throw new FS.ErrnoError(44)
        }
        var name = PATH.basename(path);
        var node = FS.lookupNode(parent, name);
        var errCode = FS.mayDelete(parent, name, false);
        if (errCode) {
            throw new FS.ErrnoError(errCode)
        }
        if (!parent.node_ops.unlink) {
            throw new FS.ErrnoError(63)
        }
        if (FS.isMountpoint(node)) {
            throw new FS.ErrnoError(10)
        }
        parent.node_ops.unlink(parent, name);
        FS.destroyNode(node)
    },
    readlink(path) {
        var lookup = FS.lookupPath(path);
        var link = lookup.node;
        if (!link) {
            throw new FS.ErrnoError(44)
        }
        if (!link.node_ops.readlink) {
            throw new FS.ErrnoError(28)
        }
        return link.node_ops.readlink(link)
    },
    stat(path, dontFollow) {
        var lookup = FS.lookupPath(path, {
            follow: !dontFollow
        });
        var node = lookup.node;
        var getattr = FS.checkOpExists(node.node_ops.getattr, 63);
        return getattr(node)
    },
    fstat(fd) {
        var stream = FS.getStreamChecked(fd);
        var node = stream.node;
        var getattr = stream.stream_ops.getattr;
        var arg = getattr ? stream : node;
        getattr ??= node.node_ops.getattr;
        FS.checkOpExists(getattr, 63);
        return getattr(arg)
    },
    lstat(path) {
        return FS.stat(path, true)
    },
    doChmod(stream, node, mode, dontFollow) {
        FS.doSetAttr(stream, node, {
            mode: mode & 4095 | node.mode & ~4095,
            ctime: Date.now(),
            dontFollow
        })
    },
    chmod(path, mode, dontFollow) {
        var node;
        if (typeof path == "string") {
            var lookup = FS.lookupPath(path, {
                follow: !dontFollow
            });
            node = lookup.node
        } else {
            node = path
        }
        FS.doChmod(null, node, mode, dontFollow)
    },
    lchmod(path, mode) {
        FS.chmod(path, mode, true)
    },
    fchmod(fd, mode) {
        var stream = FS.getStreamChecked(fd);
        FS.doChmod(stream, stream.node, mode, false)
    },
    doChown(stream, node, dontFollow) {
        FS.doSetAttr(stream, node, {
            timestamp: Date.now(),
            dontFollow
        })
    },
    chown(path, uid, gid, dontFollow) {
        var node;
        if (typeof path == "string") {
            var lookup = FS.lookupPath(path, {
                follow: !dontFollow
            });
            node = lookup.node
        } else {
            node = path
        }
        FS.doChown(null, node, dontFollow)
    },
    lchown(path, uid, gid) {
        FS.chown(path, uid, gid, true)
    },
    fchown(fd, uid, gid) {
        var stream = FS.getStreamChecked(fd);
        FS.doChown(stream, stream.node, false)
    },
    doTruncate(stream, node, len) {
        if (FS.isDir(node.mode)) {
            throw new FS.ErrnoError(31)
        }
        if (!FS.isFile(node.mode)) {
            throw new FS.ErrnoError(28)
        }
        var errCode = FS.nodePermissions(node, "w");
        if (errCode) {
            throw new FS.ErrnoError(errCode)
        }
        FS.doSetAttr(stream, node, {
            size: len,
            timestamp: Date.now()
        })
    },
    truncate(path, len) {
        if (len < 0) {
            throw new FS.ErrnoError(28)
        }
        var node;
        if (typeof path == "string") {
            var lookup = FS.lookupPath(path, {
                follow: true
            });
            node = lookup.node
        } else {
            node = path
        }
        FS.doTruncate(null, node, len)
    },
    ftruncate(fd, len) {
        var stream = FS.getStreamChecked(fd);
        if (len < 0 || (stream.flags & 2097155) === 0) {
            throw new FS.ErrnoError(28)
        }
        FS.doTruncate(stream, stream.node, len)
    },
    utime(path, atime, mtime) {
        var lookup = FS.lookupPath(path, {
            follow: true
        });
        var node = lookup.node;
        var setattr = FS.checkOpExists(node.node_ops.setattr, 63);
        setattr(node, {
            atime,
            mtime
        })
    },
    open(path, flags, mode = 438) {
        if (path === "") {
            throw new FS.ErrnoError(44)
        }
        flags = typeof flags == "string" ? FS_modeStringToFlags(flags) : flags;
        if (flags & 64) {
            mode = mode & 4095 | 32768
        } else {
            mode = 0
        }
        var node;
        var isDirPath;
        if (typeof path == "object") {
            node = path
        } else {
            isDirPath = path.endsWith("/");
            var lookup = FS.lookupPath(path, {
                follow: !(flags & 131072),
                noent_okay: true
            });
            node = lookup.node;
            path = lookup.path
        }
        var created = false;
        if (flags & 64) {
            if (node) {
                if (flags & 128) {
                    throw new FS.ErrnoError(20)
                }
            } else if (isDirPath) {
                throw new FS.ErrnoError(31)
            } else {
                node = FS.mknod(path, mode | 511, 0);
                created = true
            }
        }
        if (!node) {
            throw new FS.ErrnoError(44)
        }
        if (FS.isChrdev(node.mode)) {
            flags &= ~512
        }
        if (flags & 65536 && !FS.isDir(node.mode)) {
            throw new FS.ErrnoError(54)
        }
        if (!created) {
            var errCode = FS.mayOpen(node, flags);
            if (errCode) {
                throw new FS.ErrnoError(errCode)
            }
        }
        if (flags & 512 && !created) {
            FS.truncate(node, 0)
        }
        flags &= ~(128 | 512 | 131072);
        var stream = FS.createStream({
            node,
            path: FS.getPath(node),
            flags,
            seekable: true,
            position: 0,
            stream_ops: node.stream_ops,
            ungotten: [],
            error: false
        });
        if (stream.stream_ops.open) {
            stream.stream_ops.open(stream)
        }
        if (created) {
            FS.chmod(node, mode & 511)
        }
        if (Module["logReadFiles"] && !(flags & 1)) {
            if (!(path in FS.readFiles)) {
                FS.readFiles[path] = 1
            }
        }
        return stream
    },
    close(stream) {
        if (FS.isClosed(stream)) {
            throw new FS.ErrnoError(8)
        }
        if (stream.getdents) stream.getdents = null;
        try {
            if (stream.stream_ops.close) {
                stream.stream_ops.close(stream)
            }
        } catch (e) {
            throw e
        } finally {
            FS.closeStream(stream.fd)
        }
        stream.fd = null
    },
    isClosed(stream) {
        return stream.fd === null
    },
    llseek(stream, offset, whence) {
        if (FS.isClosed(stream)) {
            throw new FS.ErrnoError(8)
        }
        if (!stream.seekable || !stream.stream_ops.llseek) {
            throw new FS.ErrnoError(70)
        }
        if (whence != 0 && whence != 1 && whence != 2) {
            throw new FS.ErrnoError(28)
        }
        stream.position = stream.stream_ops.llseek(stream, offset, whence);
        stream.ungotten = [];
        return stream.position
    },
    read(stream, buffer, offset, length, position) {
        if (length < 0 || position < 0) {
            throw new FS.ErrnoError(28)
        }
        if (FS.isClosed(stream)) {
            throw new FS.ErrnoError(8)
        }
        if ((stream.flags & 2097155) === 1) {
            throw new FS.ErrnoError(8)
        }
        if (FS.isDir(stream.node.mode)) {
            throw new FS.ErrnoError(31)
        }
        if (!stream.stream_ops.read) {
            throw new FS.ErrnoError(28)
        }
        var seeking = typeof position != "undefined";
        if (!seeking) {
            position = stream.position
        } else if (!stream.seekable) {
            throw new FS.ErrnoError(70)
        }
        var bytesRead = stream.stream_ops.read(stream, buffer, offset, length, position);
        if (!seeking) stream.position += bytesRead;
        return bytesRead
    },
    write(stream, buffer, offset, length, position, canOwn) {
        if (length < 0 || position < 0) {
            throw new FS.ErrnoError(28)
        }
        if (FS.isClosed(stream)) {
            throw new FS.ErrnoError(8)
        }
        if ((stream.flags & 2097155) === 0) {
            throw new FS.ErrnoError(8)
        }
        if (FS.isDir(stream.node.mode)) {
            throw new FS.ErrnoError(31)
        }
        if (!stream.stream_ops.write) {
            throw new FS.ErrnoError(28)
        }
        if (stream.seekable && stream.flags & 1024) {
            FS.llseek(stream, 0, 2)
        }
        var seeking = typeof position != "undefined";
        if (!seeking) {
            position = stream.position
        } else if (!stream.seekable) {
            throw new FS.ErrnoError(70)
        }
        var bytesWritten = stream.stream_ops.write(stream, buffer, offset, length, position, canOwn);
        if (!seeking) stream.position += bytesWritten;
        return bytesWritten
    },
    mmap(stream, length, position, prot, flags) {
        if ((prot & 2) !== 0 && (flags & 2) === 0 && (stream.flags & 2097155) !== 2) {
            throw new FS.ErrnoError(2)
        }
        if ((stream.flags & 2097155) === 1) {
            throw new FS.ErrnoError(2)
        }
        if (!stream.stream_ops.mmap) {
            throw new FS.ErrnoError(43)
        }
        if (!length) {
            throw new FS.ErrnoError(28)
        }
        return stream.stream_ops.mmap(stream, length, position, prot, flags)
    },
    msync(stream, buffer, offset, length, mmapFlags) {
        if (!stream.stream_ops.msync) {
            return 0
        }
        return stream.stream_ops.msync(stream, buffer, offset, length, mmapFlags)
    },
    ioctl(stream, cmd, arg) {
        if (!stream.stream_ops.ioctl) {
            throw new FS.ErrnoError(59)
        }
        return stream.stream_ops.ioctl(stream, cmd, arg)
    },
    readFile(path, opts = {}) {
        opts.flags = opts.flags || 0;
        opts.encoding = opts.encoding || "binary";
        if (opts.encoding !== "utf8" && opts.encoding !== "binary") {
            abort(`Invalid encoding type "${opts.encoding}"`)
        }
        var stream = FS.open(path, opts.flags);
        var stat = FS.stat(path);
        var length = stat.size;
        var buf = new Uint8Array(length);
        FS.read(stream, buf, 0, length, 0);
        if (opts.encoding === "utf8") {
            buf = UTF8ArrayToString(buf)
        }
        FS.close(stream);
        return buf
    },
    writeFile(path, data, opts = {}) {
        opts.flags = opts.flags || 577;
        var stream = FS.open(path, opts.flags, opts.mode);
        if (typeof data == "string") {
            data = new Uint8Array(intArrayFromString(data, true))
        }
        if (ArrayBuffer.isView(data)) {
            FS.write(stream, data, 0, data.byteLength, undefined, opts.canOwn)
        } else {
            abort("Unsupported data type")
        }
        FS.close(stream)
    },
    cwd: () => FS.currentPath,
    chdir(path) {
        var lookup = FS.lookupPath(path, {
            follow: true
        });
        if (lookup.node === null) {
            throw new FS.ErrnoError(44)
        }
        if (!FS.isDir(lookup.node.mode)) {
            throw new FS.ErrnoError(54)
        }
        var errCode = FS.nodePermissions(lookup.node, "x");
        if (errCode) {
            throw new FS.ErrnoError(errCode)
        }
        FS.currentPath = lookup.path
    },
    createDefaultDirectories() {
        FS.mkdir("/tmp");
        FS.mkdir("/home");
        FS.mkdir("/home/web_user")
    },
    createDefaultDevices() {
        FS.mkdir("/dev");
        FS.registerDevice(FS.makedev(1, 3), {
            read: () => 0,
            write: (stream, buffer, offset, length, pos) => length,
            llseek: () => 0
        });
        FS.mkdev("/dev/null", FS.makedev(1, 3));
        TTY.register(FS.makedev(5, 0), TTY.default_tty_ops);
        TTY.register(FS.makedev(6, 0), TTY.default_tty1_ops);
        FS.mkdev("/dev/tty", FS.makedev(5, 0));
        FS.mkdev("/dev/tty1", FS.makedev(6, 0));
        var randomBuffer = new Uint8Array(1024),
            randomLeft = 0;
        var randomByte = () => {
            if (randomLeft === 0) {
                randomFill(randomBuffer);
                randomLeft = randomBuffer.byteLength
            }
            return randomBuffer[--randomLeft]
        };
        FS.createDevice("/dev", "random", randomByte);
        FS.createDevice("/dev", "urandom", randomByte);
        FS.mkdir("/dev/shm");
        FS.mkdir("/dev/shm/tmp")
    },
    createSpecialDirectories() {
        FS.mkdir("/proc");
        var proc_self = FS.mkdir("/proc/self");
        FS.mkdir("/proc/self/fd");
        FS.mount({
            mount() {
                var node = FS.createNode(proc_self, "fd", 16895, 73);
                node.stream_ops = {
                    llseek: MEMFS.stream_ops.llseek
                };
                node.node_ops = {
                    lookup(parent, name) {
                        var fd = +name;
                        var stream = FS.getStreamChecked(fd);
                        var ret = {
                            parent: null,
                            mount: {
                                mountpoint: "fake"
                            },
                            node_ops: {
                                readlink: () => stream.path
                            },
                            id: fd + 1
                        };
                        ret.parent = ret;
                        return ret
                    },
                    readdir() {
                        return Array.from(FS.streams.entries()).filter(([k, v]) => v).map(([k, v]) => k.toString())
                    }
                };
                return node
            }
        }, {}, "/proc/self/fd")
    },
    createStandardStreams(input, output, error) {
        if (input) {
            FS.createDevice("/dev", "stdin", input)
        } else {
            FS.symlink("/dev/tty", "/dev/stdin")
        }
        if (output) {
            FS.createDevice("/dev", "stdout", null, output)
        } else {
            FS.symlink("/dev/tty", "/dev/stdout")
        }
        if (error) {
            FS.createDevice("/dev", "stderr", null, error)
        } else {
            FS.symlink("/dev/tty1", "/dev/stderr")
        }
        var stdin = FS.open("/dev/stdin", 0);
        var stdout = FS.open("/dev/stdout", 1);
        var stderr = FS.open("/dev/stderr", 1)
    },
    staticInit() {
        FS.nameTable = new Array(4096);
        FS.mount(MEMFS, {}, "/");
        FS.createDefaultDirectories();
        FS.createDefaultDevices();
        FS.createSpecialDirectories();
        FS.filesystems = {
            MEMFS,
            IDBFS
        }
    },
    init(input, output, error) {
        FS.initialized = true;
        input ??= Module["stdin"];
        output ??= Module["stdout"];
        error ??= Module["stderr"];
        FS.createStandardStreams(input, output, error)
    },
    quit() {
        FS.initialized = false;
        for (var stream of FS.streams) {
            if (stream) {
                FS.close(stream)
            }
        }
    },
    findObject(path, dontResolveLastLink) {
        var ret = FS.analyzePath(path, dontResolveLastLink);
        if (!ret.exists) {
            return null
        }
        return ret.object
    },
    analyzePath(path, dontResolveLastLink) {
        try {
            var lookup = FS.lookupPath(path, {
                follow: !dontResolveLastLink
            });
            path = lookup.path
        } catch (e) {}
        var ret = {
            isRoot: false,
            exists: false,
            error: 0,
            name: null,
            path: null,
            object: null,
            parentExists: false,
            parentPath: null,
            parentObject: null
        };
        try {
            var lookup = FS.lookupPath(path, {
                parent: true
            });
            ret.parentExists = true;
            ret.parentPath = lookup.path;
            ret.parentObject = lookup.node;
            ret.name = PATH.basename(path);
            lookup = FS.lookupPath(path, {
                follow: !dontResolveLastLink
            });
            ret.exists = true;
            ret.path = lookup.path;
            ret.object = lookup.node;
            ret.name = lookup.node.name;
            ret.isRoot = lookup.path === "/"
        } catch (e) {
            ret.error = e.errno
        }
        return ret
    },
    createPath(parent, path, canRead, canWrite) {
        parent = typeof parent == "string" ? parent : FS.getPath(parent);
        var parts = path.split("/").reverse();
        while (parts.length) {
            var part = parts.pop();
            if (!part) continue;
            var current = PATH.join2(parent, part);
            try {
                FS.mkdir(current)
            } catch (e) {
                if (e.errno != 20) throw e
            }
            parent = current
        }
        return current
    },
    createFile(parent, name, properties, canRead, canWrite) {
        var path = PATH.join2(typeof parent == "string" ? parent : FS.getPath(parent), name);
        var mode = FS_getMode(canRead, canWrite);
        return FS.create(path, mode)
    },
    createDataFile(parent, name, data, canRead, canWrite, canOwn) {
        var path = name;
        if (parent) {
            parent = typeof parent == "string" ? parent : FS.getPath(parent);
            path = name ? PATH.join2(parent, name) : parent
        }
        var mode = FS_getMode(canRead, canWrite);
        var node = FS.create(path, mode);
        if (data) {
            if (typeof data == "string") {
                var arr = new Array(data.length);
                for (var i = 0, len = data.length; i < len; ++i) arr[i] = data.charCodeAt(i);
                data = arr
            }
            FS.chmod(node, mode | 146);
            var stream = FS.open(node, 577);
            FS.write(stream, data, 0, data.length, 0, canOwn);
            FS.close(stream);
            FS.chmod(node, mode)
        }
    },
    createDevice(parent, name, input, output) {
        var path = PATH.join2(typeof parent == "string" ? parent : FS.getPath(parent), name);
        var mode = FS_getMode(!!input, !!output);
        FS.createDevice.major ??= 64;
        var dev = FS.makedev(FS.createDevice.major++, 0);
        FS.registerDevice(dev, {
            open(stream) {
                stream.seekable = false
            },
            close(stream) {
                if (output?.buffer?.length) {
                    output(10)
                }
            },
            read(stream, buffer, offset, length, pos) {
                var bytesRead = 0;
                for (var i = 0; i < length; i++) {
                    var result;
                    try {
                        result = input()
                    } catch (e) {
                        throw new FS.ErrnoError(29)
                    }
                    if (result === undefined && bytesRead === 0) {
                        throw new FS.ErrnoError(6)
                    }
                    if (result === null || result === undefined) break;
                    bytesRead++;
                    buffer[offset + i] = result
                }
                if (bytesRead) {
                    stream.node.atime = Date.now()
                }
                return bytesRead
            },
            write(stream, buffer, offset, length, pos) {
                for (var i = 0; i < length; i++) {
                    try {
                        output(buffer[offset + i])
                    } catch (e) {
                        throw new FS.ErrnoError(29)
                    }
                }
                if (length) {
                    stream.node.mtime = stream.node.ctime = Date.now()
                }
                return i
            }
        });
        return FS.mkdev(path, mode, dev)
    },
    forceLoadFile(obj) {
        if (obj.isDevice || obj.isFolder || obj.link || obj.contents) return true;
        if (globalThis.XMLHttpRequest) {
            abort("Lazy loading should have been performed (contents set) in createLazyFile, but it was not. Lazy loading only works in web workers. Use --embed-file or --preload-file in emcc on the main thread.")
        } else {
            try {
                obj.contents = readBinary(obj.url)
            } catch (e) {
                throw new FS.ErrnoError(29)
            }
        }
    },
    createLazyFile(parent, name, url, canRead, canWrite) {
        class LazyUint8Array {
            lengthKnown = false;
            chunks = [];
            get(idx) {
                if (idx > this.length - 1 || idx < 0) {
                    return undefined
                }
                var chunkOffset = idx % this.chunkSize;
                var chunkNum = idx / this.chunkSize | 0;
                return this.getter(chunkNum)[chunkOffset]
            }
            setDataGetter(getter) {
                this.getter = getter
            }
            cacheLength() {
                var xhr = new XMLHttpRequest;
                xhr.open("HEAD", url, false);
                xhr.send(null);
                if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) abort("Couldn't load " + url + ". Status: " + xhr.status);
                var datalength = Number(xhr.getResponseHeader("Content-length"));
                var header;
                var hasByteServing = (header = xhr.getResponseHeader("Accept-Ranges")) && header === "bytes";
                var usesGzip = (header = xhr.getResponseHeader("Content-Encoding")) && header === "gzip";
                var chunkSize = 1024 * 1024;
                if (!hasByteServing) chunkSize = datalength;
                var doXHR = (from, to) => {
                    if (from > to) abort("invalid range (" + from + ", " + to + ") or no bytes requested!");
                    if (to > datalength - 1) abort("only " + datalength + " bytes available! programmer error!");
                    var xhr = new XMLHttpRequest;
                    xhr.open("GET", url, false);
                    if (datalength !== chunkSize) xhr.setRequestHeader("Range", "bytes=" + from + "-" + to);
                    xhr.responseType = "arraybuffer";
                    if (xhr.overrideMimeType) {
                        xhr.overrideMimeType("text/plain; charset=x-user-defined")
                    }
                    xhr.send(null);
                    if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) abort("Couldn't load " + url + ". Status: " + xhr.status);
                    if (xhr.response !== undefined) {
                        return new Uint8Array(xhr.response || [])
                    }
                    return intArrayFromString(xhr.responseText || "", true)
                };
                var lazyArray = this;
                lazyArray.setDataGetter(chunkNum => {
                    var start = chunkNum * chunkSize;
                    var end = (chunkNum + 1) * chunkSize - 1;
                    end = Math.min(end, datalength - 1);
                    if (typeof lazyArray.chunks[chunkNum] == "undefined") {
                        lazyArray.chunks[chunkNum] = doXHR(start, end)
                    }
                    if (typeof lazyArray.chunks[chunkNum] == "undefined") abort("doXHR failed!");
                    return lazyArray.chunks[chunkNum]
                });
                if (usesGzip || !datalength) {
                    chunkSize = datalength = 1;
                    datalength = this.getter(0).length;
                    chunkSize = datalength;
                    out("LazyFiles on gzip forces download of the whole file when length is accessed")
                }
                this._length = datalength;
                this._chunkSize = chunkSize;
                this.lengthKnown = true
            }
            get length() {
                if (!this.lengthKnown) {
                    this.cacheLength()
                }
                return this._length
            }
            get chunkSize() {
                if (!this.lengthKnown) {
                    this.cacheLength()
                }
                return this._chunkSize
            }
        }
        if (globalThis.XMLHttpRequest) {
            if (!ENVIRONMENT_IS_WORKER) abort("Cannot do synchronous binary XHRs outside webworkers in modern browsers. Use --embed-file or --preload-file in emcc");
            var lazyArray = new LazyUint8Array;
            var properties = {
                isDevice: false,
                contents: lazyArray
            }
        } else {
            var properties = {
                isDevice: false,
                url
            }
        }
        var node = FS.createFile(parent, name, properties, canRead, canWrite);
        if (properties.contents) {
            node.contents = properties.contents
        } else if (properties.url) {
            node.contents = null;
            node.url = properties.url
        }
        Object.defineProperties(node, {
            usedBytes: {
                get: function() {
                    return this.contents.length
                }
            }
        });
        var stream_ops = {};
        for (const [key, fn] of Object.entries(node.stream_ops)) {
            stream_ops[key] = (...args) => {
                FS.forceLoadFile(node);
                return fn(...args)
            }
        }

        function writeChunks(stream, buffer, offset, length, position) {
            var contents = stream.node.contents;
            if (position >= contents.length) return 0;
            var size = Math.min(contents.length - position, length);
            if (contents.slice) {
                for (var i = 0; i < size; i++) {
                    buffer[offset + i] = contents[position + i]
                }
            } else {
                for (var i = 0; i < size; i++) {
                    buffer[offset + i] = contents.get(position + i)
                }
            }
            return size
        }
        stream_ops.read = (stream, buffer, offset, length, position) => {
            FS.forceLoadFile(node);
            return writeChunks(stream, buffer, offset, length, position)
        };
        stream_ops.mmap = (stream, length, position, prot, flags) => {
            FS.forceLoadFile(node);
            var ptr = mmapAlloc(length);
            if (!ptr) {
                throw new FS.ErrnoError(48)
            }
            writeChunks(stream, HEAP8, ptr, length, position);
            return {
                ptr,
                allocated: true
            }
        };
        node.stream_ops = stream_ops;
        return node
    }
};
var UTF8ToString = (ptr, maxBytesToRead, ignoreNul) => {
    if (!ptr) return "";
    var end = findStringEnd(HEAPU8, ptr, maxBytesToRead, ignoreNul);
    return UTF8Decoder.decode(HEAPU8.subarray(ptr, end))
};
var SYSCALLS = {
    DEFAULT_POLLMASK: 5,
    calculateAt(dirfd, path, allowEmpty) {
        if (PATH.isAbs(path)) {
            return path
        }
        var dir;
        if (dirfd === -100) {
            dir = FS.cwd()
        } else {
            var dirstream = SYSCALLS.getStreamFromFD(dirfd);
            dir = dirstream.path
        }
        if (path.length == 0) {
            if (!allowEmpty) {
                throw new FS.ErrnoError(44)
            }
            return dir
        }
        return dir + "/" + path
    },
    writeStat(buf, stat) {
        HEAPU32[buf >> 2] = stat.dev;
        HEAPU32[buf + 4 >> 2] = stat.mode;
        HEAPU32[buf + 8 >> 2] = stat.nlink;
        HEAPU32[buf + 12 >> 2] = stat.uid;
        HEAPU32[buf + 16 >> 2] = stat.gid;
        HEAPU32[buf + 20 >> 2] = stat.rdev;
        HEAP64[buf + 24 >> 3] = BigInt(stat.size);
        HEAP32[buf + 32 >> 2] = 4096;
        HEAP32[buf + 36 >> 2] = stat.blocks;
        var atime = stat.atime.getTime();
        var mtime = stat.mtime.getTime();
        var ctime = stat.ctime.getTime();
        HEAP64[buf + 40 >> 3] = BigInt(Math.floor(atime / 1e3));
        HEAPU32[buf + 48 >> 2] = atime % 1e3 * 1e3 * 1e3;
        HEAP64[buf + 56 >> 3] = BigInt(Math.floor(mtime / 1e3));
        HEAPU32[buf + 64 >> 2] = mtime % 1e3 * 1e3 * 1e3;
        HEAP64[buf + 72 >> 3] = BigInt(Math.floor(ctime / 1e3));
        HEAPU32[buf + 80 >> 2] = ctime % 1e3 * 1e3 * 1e3;
        HEAP64[buf + 88 >> 3] = BigInt(stat.ino);
        return 0
    },
    writeStatFs(buf, stats) {
        HEAPU32[buf + 4 >> 2] = stats.bsize;
        HEAPU32[buf + 60 >> 2] = stats.bsize;
        HEAP64[buf + 8 >> 3] = BigInt(stats.blocks);
        HEAP64[buf + 16 >> 3] = BigInt(stats.bfree);
        HEAP64[buf + 24 >> 3] = BigInt(stats.bavail);
        HEAP64[buf + 32 >> 3] = BigInt(stats.files);
        HEAP64[buf + 40 >> 3] = BigInt(stats.ffree);
        HEAPU32[buf + 48 >> 2] = stats.fsid;
        HEAPU32[buf + 64 >> 2] = stats.flags;
        HEAPU32[buf + 56 >> 2] = stats.namelen
    },
    doMsync(addr, stream, len, flags, offset) {
        if (!FS.isFile(stream.node.mode)) {
            throw new FS.ErrnoError(43)
        }
        if (flags & 2) {
            return 0
        }
        var buffer = HEAPU8.slice(addr, addr + len);
        FS.msync(stream, buffer, offset, len, flags)
    },
    getStreamFromFD(fd) {
        var stream = FS.getStreamChecked(fd);
        return stream
    },
    varargs: undefined,
    getStr(ptr) {
        var ret = UTF8ToString(ptr);
        return ret
    }
};
var ___syscall__newselect = function(nfds, readfds, writefds, exceptfds, timeout) {
    try {
        var total = 0;
        var srcReadLow = readfds ? HEAP32[readfds >> 2] : 0,
            srcReadHigh = readfds ? HEAP32[readfds + 4 >> 2] : 0;
        var srcWriteLow = writefds ? HEAP32[writefds >> 2] : 0,
            srcWriteHigh = writefds ? HEAP32[writefds + 4 >> 2] : 0;
        var srcExceptLow = exceptfds ? HEAP32[exceptfds >> 2] : 0,
            srcExceptHigh = exceptfds ? HEAP32[exceptfds + 4 >> 2] : 0;
        var dstReadLow = 0,
            dstReadHigh = 0;
        var dstWriteLow = 0,
            dstWriteHigh = 0;
        var dstExceptLow = 0,
            dstExceptHigh = 0;
        var allLow = (readfds ? HEAP32[readfds >> 2] : 0) | (writefds ? HEAP32[writefds >> 2] : 0) | (exceptfds ? HEAP32[exceptfds >> 2] : 0);
        var allHigh = (readfds ? HEAP32[readfds + 4 >> 2] : 0) | (writefds ? HEAP32[writefds + 4 >> 2] : 0) | (exceptfds ? HEAP32[exceptfds + 4 >> 2] : 0);
        var check = (fd, low, high, val) => fd < 32 ? low & val : high & val;
        for (var fd = 0; fd < nfds; fd++) {
            var mask = 1 << fd % 32;
            if (!check(fd, allLow, allHigh, mask)) {
                continue
            }
            var stream = SYSCALLS.getStreamFromFD(fd);
            var flags = SYSCALLS.DEFAULT_POLLMASK;
            if (stream.stream_ops.poll) {
                var timeoutInMillis = -1;
                if (timeout) {
                    var tv_sec = readfds ? HEAP32[timeout >> 2] : 0,
                        tv_usec = readfds ? HEAP32[timeout + 4 >> 2] : 0;
                    timeoutInMillis = (tv_sec + tv_usec / 1e6) * 1e3
                }
                flags = stream.stream_ops.poll(stream, timeoutInMillis)
            }
            if (flags & 1 && check(fd, srcReadLow, srcReadHigh, mask)) {
                fd < 32 ? dstReadLow = dstReadLow | mask : dstReadHigh = dstReadHigh | mask;
                total++
            }
            if (flags & 4 && check(fd, srcWriteLow, srcWriteHigh, mask)) {
                fd < 32 ? dstWriteLow = dstWriteLow | mask : dstWriteHigh = dstWriteHigh | mask;
                total++
            }
            if (flags & 2 && check(fd, srcExceptLow, srcExceptHigh, mask)) {
                fd < 32 ? dstExceptLow = dstExceptLow | mask : dstExceptHigh = dstExceptHigh | mask;
                total++
            }
        }
        if (readfds) {
            HEAP32[readfds >> 2] = dstReadLow;
            HEAP32[readfds + 4 >> 2] = dstReadHigh
        }
        if (writefds) {
            HEAP32[writefds >> 2] = dstWriteLow;
            HEAP32[writefds + 4 >> 2] = dstWriteHigh
        }
        if (exceptfds) {
            HEAP32[exceptfds >> 2] = dstExceptLow;
            HEAP32[exceptfds + 4 >> 2] = dstExceptHigh
        }
        return total
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
};

function ___syscall_chdir(path) {
    try {
        path = SYSCALLS.getStr(path);
        FS.chdir(path);
        return 0
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_faccessat(dirfd, path, amode, flags) {
    try {
        path = SYSCALLS.getStr(path);
        path = SYSCALLS.calculateAt(dirfd, path);
        if (amode & ~7) {
            return -28
        }
        var lookup = FS.lookupPath(path, {
            follow: true
        });
        var node = lookup.node;
        if (!node) {
            return -44
        }
        var perms = "";
        if (amode & 4) perms += "r";
        if (amode & 2) perms += "w";
        if (amode & 1) perms += "x";
        if (perms && FS.nodePermissions(node, perms)) {
            return -2
        }
        return 0
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}
var syscallGetVarargI = () => {
    var ret = HEAP32[+SYSCALLS.varargs >> 2];
    SYSCALLS.varargs += 4;
    return ret
};
var syscallGetVarargP = syscallGetVarargI;

function ___syscall_fcntl64(fd, cmd, varargs) {
    SYSCALLS.varargs = varargs;
    try {
        var stream = SYSCALLS.getStreamFromFD(fd);
        switch (cmd) {
            case 0: {
                var arg = syscallGetVarargI();
                if (arg < 0) {
                    return -28
                }
                while (FS.streams[arg]) {
                    arg++
                }
                var newStream;
                newStream = FS.dupStream(stream, arg);
                return newStream.fd
            }
            case 1:
            case 2:
                return 0;
            case 3:
                return stream.flags;
            case 4: {
                var arg = syscallGetVarargI();
                stream.flags |= arg;
                return 0
            }
            case 12: {
                var arg = syscallGetVarargP();
                var offset = 0;
                HEAP16[arg + offset >> 1] = 2;
                return 0
            }
            case 13:
            case 14:
                return 0
        }
        return -28
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}
var stringToUTF8 = (str, outPtr, maxBytesToWrite) => stringToUTF8Array(str, HEAPU8, outPtr, maxBytesToWrite);

function ___syscall_getcwd(buf, size) {
    try {
        if (size === 0) return -28;
        var cwd = FS.cwd();
        var cwdLengthInBytes = lengthBytesUTF8(cwd) + 1;
        if (size < cwdLengthInBytes) return -68;
        stringToUTF8(cwd, buf, size);
        return cwdLengthInBytes
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_getdents64(fd, dirp, count) {
    try {
        var stream = SYSCALLS.getStreamFromFD(fd);
        stream.getdents ||= FS.readdir(stream.path);
        var struct_size = 280;
        var pos = 0;
        var off = FS.llseek(stream, 0, 1);
        var startIdx = Math.floor(off / struct_size);
        var endIdx = Math.min(stream.getdents.length, startIdx + Math.floor(count / struct_size));
        for (var idx = startIdx; idx < endIdx; idx++) {
            var id;
            var type;
            var name = stream.getdents[idx];
            if (name === ".") {
                id = stream.node.id;
                type = 4
            } else if (name === "..") {
                var lookup = FS.lookupPath(stream.path, {
                    parent: true
                });
                id = lookup.node.id;
                type = 4
            } else {
                var child;
                try {
                    child = FS.lookupNode(stream.node, name)
                } catch (e) {
                    if (e?.errno === 28) {
                        continue
                    }
                    throw e
                }
                id = child.id;
                type = FS.isChrdev(child.mode) ? 2 : FS.isDir(child.mode) ? 4 : FS.isLink(child.mode) ? 10 : 8
            }
            HEAP64[dirp + pos >> 3] = BigInt(id);
            HEAP64[dirp + pos + 8 >> 3] = BigInt((idx + 1) * struct_size);
            HEAP16[dirp + pos + 16 >> 1] = 280;
            HEAP8[dirp + pos + 18] = type;
            stringToUTF8(name, dirp + pos + 19, 256);
            pos += struct_size
        }
        FS.llseek(stream, idx * struct_size, 0);
        return pos
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_ioctl(fd, op, varargs) {
    SYSCALLS.varargs = varargs;
    try {
        var stream = SYSCALLS.getStreamFromFD(fd);
        switch (op) {
            case 21509: {
                if (!stream.tty) return -59;
                return 0
            }
            case 21505: {
                if (!stream.tty) return -59;
                if (stream.tty.ops.ioctl_tcgets) {
                    var termios = stream.tty.ops.ioctl_tcgets(stream);
                    var argp = syscallGetVarargP();
                    HEAP32[argp >> 2] = termios.c_iflag || 0;
                    HEAP32[argp + 4 >> 2] = termios.c_oflag || 0;
                    HEAP32[argp + 8 >> 2] = termios.c_cflag || 0;
                    HEAP32[argp + 12 >> 2] = termios.c_lflag || 0;
                    for (var i = 0; i < 32; i++) {
                        HEAP8[argp + i + 17] = termios.c_cc[i] || 0
                    }
                    return 0
                }
                return 0
            }
            case 21510:
            case 21511:
            case 21512: {
                if (!stream.tty) return -59;
                return 0
            }
            case 21506:
            case 21507:
            case 21508: {
                if (!stream.tty) return -59;
                if (stream.tty.ops.ioctl_tcsets) {
                    var argp = syscallGetVarargP();
                    var c_iflag = HEAP32[argp >> 2];
                    var c_oflag = HEAP32[argp + 4 >> 2];
                    var c_cflag = HEAP32[argp + 8 >> 2];
                    var c_lflag = HEAP32[argp + 12 >> 2];
                    var c_cc = [];
                    for (var i = 0; i < 32; i++) {
                        c_cc.push(HEAP8[argp + i + 17])
                    }
                    return stream.tty.ops.ioctl_tcsets(stream.tty, op, {
                        c_iflag,
                        c_oflag,
                        c_cflag,
                        c_lflag,
                        c_cc
                    })
                }
                return 0
            }
            case 21519: {
                if (!stream.tty) return -59;
                var argp = syscallGetVarargP();
                HEAP32[argp >> 2] = 0;
                return 0
            }
            case 21520: {
                if (!stream.tty) return -59;
                return -28
            }
            case 21537:
            case 21531: {
                var argp = syscallGetVarargP();
                return FS.ioctl(stream, op, argp)
            }
            case 21523: {
                if (!stream.tty) return -59;
                if (stream.tty.ops.ioctl_tiocgwinsz) {
                    var winsize = stream.tty.ops.ioctl_tiocgwinsz(stream.tty);
                    var argp = syscallGetVarargP();
                    HEAP16[argp >> 1] = winsize[0];
                    HEAP16[argp + 2 >> 1] = winsize[1]
                }
                return 0
            }
            case 21524: {
                if (!stream.tty) return -59;
                return 0
            }
            case 21515: {
                if (!stream.tty) return -59;
                return 0
            }
            default:
                return -28
        }
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_lstat64(path, buf) {
    try {
        path = SYSCALLS.getStr(path);
        return SYSCALLS.writeStat(buf, FS.lstat(path))
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_mkdirat(dirfd, path, mode) {
    try {
        path = SYSCALLS.getStr(path);
        path = SYSCALLS.calculateAt(dirfd, path);
        FS.mkdir(path, mode, 0);
        return 0
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_newfstatat(dirfd, path, buf, flags) {
    try {
        path = SYSCALLS.getStr(path);
        var nofollow = flags & 256;
        var allowEmpty = flags & 4096;
        flags = flags & ~6400;
        path = SYSCALLS.calculateAt(dirfd, path, allowEmpty);
        return SYSCALLS.writeStat(buf, nofollow ? FS.lstat(path) : FS.stat(path))
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_openat(dirfd, path, flags, varargs) {
    SYSCALLS.varargs = varargs;
    try {
        path = SYSCALLS.getStr(path);
        path = SYSCALLS.calculateAt(dirfd, path);
        var mode = varargs ? syscallGetVarargI() : 0;
        return FS.open(path, flags, mode).fd
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_readlinkat(dirfd, path, buf, bufsize) {
    try {
        path = SYSCALLS.getStr(path);
        path = SYSCALLS.calculateAt(dirfd, path);
        if (bufsize <= 0) return -28;
        var ret = FS.readlink(path);
        var len = Math.min(bufsize, lengthBytesUTF8(ret));
        var endChar = HEAP8[buf + len];
        stringToUTF8(ret, buf, bufsize + 1);
        HEAP8[buf + len] = endChar;
        return len
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_stat64(path, buf) {
    try {
        path = SYSCALLS.getStr(path);
        return SYSCALLS.writeStat(buf, FS.stat(path))
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}

function ___syscall_unlinkat(dirfd, path, flags) {
    try {
        path = SYSCALLS.getStr(path);
        path = SYSCALLS.calculateAt(dirfd, path);
        if (!flags) {
            FS.unlink(path)
        } else if (flags === 512) {
            FS.rmdir(path)
        } else {
            return -28
        }
        return 0
    } catch (e) {
        if (typeof FS == "undefined" || !(e.name === "ErrnoError")) throw e;
        return -e.errno
    }
}