1 files changed, 46 insertions, 0 deletions
diff --git a/cli/dts/lib.deno.ns.d.ts b/cli/dts/lib.deno.ns.d.ts
index 276f13e37..896b5c800 100644
--- a/cli/dts/lib.deno.ns.d.ts
+++ b/cli/dts/lib.deno.ns.d.ts
@@ -676,6 +676,52 @@ declare namespace Deno {
     whence: SeekMode,
   ): Promise<number>;
 
+  /**
+   * Synchronously flushes any pending data and metadata operations of the given file stream to disk.
+   *  ```ts
+   * const file = Deno.openSync("my_file.txt", { read: true, write: true, create: true });
+   * Deno.writeSync(file.rid, new TextEncoder().encode("Hello World"));
+   * Deno.ftruncateSync(file.rid, 1);
+   * Deno.fsyncSync(file.rid);
+   * console.log(new TextDecoder().decode(Deno.readFileSync("my_file.txt"))); // H
+   * ```
+   */
+  export function fsyncSync(rid: number): void;
+
+  /**
+   * Flushes any pending data and metadata operations of the given file stream to disk.
+   *  ```ts
+   * const file = await Deno.open("my_file.txt", { read: true, write: true, create: true });
+   * await Deno.write(file.rid, new TextEncoder().encode("Hello World"));
+   * await Deno.ftruncate(file.rid, 1);
+   * await Deno.fsync(file.rid);
+   * console.log(new TextDecoder().decode(await Deno.readFile("my_file.txt"))); // H
+   * ```
+   */
+  export function fsync(rid: number): Promise<void>;
+
+  /*
+   * Synchronously flushes any pending data operations of the given file stream to disk.
+   *  ```ts
+   * const file = Deno.openSync("my_file.txt", { read: true, write: true, create: true });
+   * Deno.writeSync(file.rid, new TextEncoder().encode("Hello World"));
+   * Deno.fdatasyncSync(file.rid);
+   * console.log(new TextDecoder().decode(Deno.readFileSync("my_file.txt"))); // Hello World
+   * ```
+   */
+  export function fdatasyncSync(rid: number): void;
+
+  /**
+   * Flushes any pending data operations of the given file stream to disk.
+   *  ```ts
+   * const file = await Deno.open("my_file.txt", { read: true, write: true, create: true });
+   * await Deno.write(file.rid, new TextEncoder().encode("Hello World"));
+   * await Deno.fdatasync(file.rid);
+   * console.log(new TextDecoder().decode(await Deno.readFile("my_file.txt"))); // Hello World
+   * ```
+   */
+  export function fdatasync(rid: number): Promise<void>;
+
   /** Close the given resource ID (rid) which has been previously opened, such
    * as via opening or creating a file.  Closing a file when you are finished
    * with it is important to avoid leaking resources.