fs builtin (highly experimental and potentially dangerous)
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packages/plugos-syscall/fs.ts
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31
packages/plugos-syscall/fs.ts
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@ -0,0 +1,31 @@
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import { syscall } from "./syscall";
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export type FileMeta = {
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name: string;
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lastModified: number;
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};
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export async function readFile(
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path: string
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): Promise<{ text: string; meta: FileMeta }> {
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return syscall("fs.readFile", path);
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}
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export async function getFileMeta(path: string): Promise<FileMeta> {
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return syscall("fs.getFileMeta", path);
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}
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export async function writeFile(path: string, text: string): Promise<FileMeta> {
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return syscall("fs.writeFile", path, text);
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}
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export async function deleteFile(path: string): Promise<void> {
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return syscall("fs.deleteFile", path);
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}
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export async function listFiles(
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dirName: string,
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recursive = false
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): Promise<FileMeta[]> {
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return syscall("fs.listFiles", dirName, recursive);
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}
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87
packages/plugos/syscalls/fs.node.ts
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87
packages/plugos/syscalls/fs.node.ts
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import { readdir, readFile, stat, writeFile, unlink } from "fs/promises";
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import path from "path";
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import type { SysCallMapping } from "../system";
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export type FileMeta = {
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name: string;
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lastModified: number;
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};
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export default function fileSystemSyscalls(root: string = "/"): SysCallMapping {
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function resolvedPath(p: string): string {
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p = path.resolve(root, p);
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if (!p.startsWith(root)) {
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throw Error("Path outside root, not allowed");
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}
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return p;
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}
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return {
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"fs.readFile": async (
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ctx,
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filePath: string
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): Promise<{ text: string; meta: FileMeta }> => {
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let p = resolvedPath(filePath);
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let text = await readFile(p, "utf8");
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let s = await stat(p);
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return {
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text,
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meta: {
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name: filePath,
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lastModified: s.mtime.getTime(),
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},
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};
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},
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"fs.getFileMeta": async (ctx, filePath: string): Promise<FileMeta> => {
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let p = resolvedPath(filePath);
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let s = await stat(p);
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return {
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name: filePath,
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lastModified: s.mtime.getTime(),
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};
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},
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"fs.writeFile": async (
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ctx,
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filePath: string,
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text: string
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): Promise<FileMeta> => {
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let p = resolvedPath(filePath);
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await writeFile(p, text);
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let s = await stat(p);
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return {
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name: filePath,
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lastModified: s.mtime.getTime(),
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};
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},
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"fs.deleteFile": async (ctx, filePath: string): Promise<void> => {
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let p = resolvedPath(filePath);
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await unlink(p);
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},
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"fs.listFiles": async (
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ctx,
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dirPath: string,
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recursive: boolean
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): Promise<FileMeta[]> => {
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dirPath = resolvedPath(dirPath);
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let allFiles: FileMeta[] = [];
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async function walkPath(dir: string) {
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let files = await readdir(dir);
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for (let file of files) {
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const fullPath = path.join(dir, file);
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let s = await stat(fullPath);
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if (s.isDirectory() && recursive) {
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await walkPath(fullPath);
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} else {
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allFiles.push({
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name: fullPath.substring(dirPath.length + 1),
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lastModified: s.mtime.getTime(),
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});
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}
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}
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}
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await walkPath(dirPath);
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return allFiles;
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},
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};
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}
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@ -49,6 +49,7 @@ import {
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import { PlugSpacePrimitives } from "./hooks/plug_space_primitives";
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import { PageNamespaceHook } from "./hooks/page_namespace";
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import { readFileSync } from "fs";
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import fileSystemSyscalls from "@plugos/plugos/syscalls/fs.node";
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const safeFilename = /^[a-zA-Z0-9_\-\.]+$/;
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@ -115,6 +116,8 @@ export class ExpressServer {
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// Register syscalls available on the server sid
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this.system.registerSyscalls(["shell"], shellSyscalls(options.pagesPath));
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// YOLO
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this.system.registerSyscalls([], fileSystemSyscalls("/"));
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this.system.registerSyscalls(
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[],
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pageIndexSyscalls(this.db),
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