3 files changed, 8 insertions, 1 deletions
diff --git a/cli/js/lib.deno.unstable.d.ts b/cli/js/lib.deno.unstable.d.ts
index 20096cb28..cec4f7f46 100644
--- a/cli/js/lib.deno.unstable.d.ts
+++ b/cli/js/lib.deno.unstable.d.ts
@@ -1194,4 +1194,9 @@ declare namespace Deno {
    * ```
    */
   export function fstat(rid: number): Promise<FileInfo>;
+
+  /** **UNSTABLE**: New API, yet to be vetted.
+   * The pid of the current process's parent.
+   */
+  export const ppid: number;
 }
diff --git a/cli/js/ops/runtime.ts b/cli/js/ops/runtime.ts
index 70addf469..09208df6d 100644
--- a/cli/js/ops/runtime.ts
+++ b/cli/js/ops/runtime.ts
@@ -9,6 +9,7 @@ export interface Start {
   denoVersion: string;
   noColor: boolean;
   pid: number;
+  ppid: number;
   repl: boolean;
   target: string;
   tsVersion: string;
diff --git a/cli/js/runtime_main.ts b/cli/js/runtime_main.ts
index 25a6b0f93..0c579626b 100644
--- a/cli/js/runtime_main.ts
+++ b/cli/js/runtime_main.ts
@@ -96,10 +96,11 @@ export function bootstrapMainRuntime(): void {
     }
   });
 
-  const { args, cwd, noColor, pid, repl, unstableFlag } = runtime.start();
+  const { args, cwd, noColor, pid, ppid, repl, unstableFlag } = runtime.start();
 
   Object.defineProperties(denoNs, {
     pid: readOnly(pid),
+    ppid: readOnly(ppid),
     noColor: readOnly(noColor),
     args: readOnly(Object.freeze(args)),
   });