1 files changed, 60 insertions, 0 deletions
diff --git a/ext/node/polyfills/_fs/_fs_fstat.ts b/ext/node/polyfills/_fs/_fs_fstat.ts
new file mode 100644
index 000000000..ab9cbead4
--- /dev/null
+++ b/ext/node/polyfills/_fs/_fs_fstat.ts
@@ -0,0 +1,60 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+import {
+  BigIntStats,
+  CFISBIS,
+  statCallback,
+  statCallbackBigInt,
+  statOptions,
+  Stats,
+} from "internal:deno_node/polyfills/_fs/_fs_stat.ts";
+
+export function fstat(fd: number, callback: statCallback): void;
+export function fstat(
+  fd: number,
+  options: { bigint: false },
+  callback: statCallback,
+): void;
+export function fstat(
+  fd: number,
+  options: { bigint: true },
+  callback: statCallbackBigInt,
+): void;
+export function fstat(
+  fd: number,
+  optionsOrCallback: statCallback | statCallbackBigInt | statOptions,
+  maybeCallback?: statCallback | statCallbackBigInt,
+) {
+  const callback =
+    (typeof optionsOrCallback === "function"
+      ? optionsOrCallback
+      : maybeCallback) as (
+        ...args: [Error] | [null, BigIntStats | Stats]
+      ) => void;
+  const options = typeof optionsOrCallback === "object"
+    ? optionsOrCallback
+    : { bigint: false };
+
+  if (!callback) throw new Error("No callback function supplied");
+
+  Deno.fstat(fd).then(
+    (stat) => callback(null, CFISBIS(stat, options.bigint)),
+    (err) => callback(err),
+  );
+}
+
+export function fstatSync(fd: number): Stats;
+export function fstatSync(
+  fd: number,
+  options: { bigint: false },
+): Stats;
+export function fstatSync(
+  fd: number,
+  options: { bigint: true },
+): BigIntStats;
+export function fstatSync(
+  fd: number,
+  options?: statOptions,
+): Stats | BigIntStats {
+  const origin = Deno.fstatSync(fd);
+  return CFISBIS(origin, options?.bigint || false);
+}