fix(node): Implement `fs.lchown` (and `process.getegid`) (#24418)

Closes https://github.com/denoland/deno/issues/21260.
Part of https://github.com/denoland/deno/issues/18218.

Implements `node:fs.lchown`, and enables the node_compat test for it.
The test uses `process.getegid`, which we didn't have implemented, so I
went ahead and implemented that as well to get the test working.

1 files changed, 61 insertions, 0 deletions

diff --git a/ext/node/polyfills/_fs/_fs_lchown.ts b/ext/node/polyfills/_fs/_fs_lchown.ts
new file mode 100644
index 000000000..8611c8021
--- /dev/null
+++ b/ext/node/polyfills/_fs/_fs_lchown.ts
@@ -0,0 +1,61 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+
+// TODO(petamoriken): enable prefer-primordials for node polyfills
+// deno-lint-ignore-file prefer-primordials
+
+import {
+  type CallbackWithError,
+  makeCallback,
+} from "ext:deno_node/_fs/_fs_common.ts";
+import {
+  getValidatedPath,
+  kMaxUserId,
+} from "ext:deno_node/internal/fs/utils.mjs";
+import * as pathModule from "node:path";
+import { validateInteger } from "ext:deno_node/internal/validators.mjs";
+import type { Buffer } from "node:buffer";
+import { promisify } from "ext:deno_node/internal/util.mjs";
+import { op_node_lchown, op_node_lchown_sync } from "ext:core/ops";
+
+/**
+ * Asynchronously changes the owner and group
+ * of a file, without following symlinks.
+ */
+export function lchown(
+  path: string | Buffer | URL,
+  uid: number,
+  gid: number,
+  callback: CallbackWithError,
+) {
+  callback = makeCallback(callback);
+  path = getValidatedPath(path).toString();
+  validateInteger(uid, "uid", -1, kMaxUserId);
+  validateInteger(gid, "gid", -1, kMaxUserId);
+
+  op_node_lchown(pathModule.toNamespacedPath(path), uid, gid).then(
+    () => callback(null),
+    callback,
+  );
+}
+
+export const lchownPromise = promisify(lchown) as (
+  path: string | Buffer | URL,
+  uid: number,
+  gid: number,
+) => Promise<void>;
+
+/**
+ * Synchronously changes the owner and group
+ * of a file, without following symlinks.
+ */
+export function lchownSync(
+  path: string | Buffer | URL,
+  uid: number,
+  gid: number,
+) {
+  path = getValidatedPath(path).toString();
+  validateInteger(uid, "uid", -1, kMaxUserId);
+  validateInteger(gid, "gid", -1, kMaxUserId);
+
+  op_node_lchown_sync(pathModule.toNamespacedPath(path), uid, gid);
+}