From 16cb45103f29a46fbd19eb19e3042678800e1b70 Mon Sep 17 00:00:00 2001
From: Mikeal Rogers <mikeal.rogers@gmail.com>
Date: Tue, 13 Jul 2010 17:17:05 -0700
Subject: [PATCH] Adds "pause" and "resume" events to pump and it's readable
 argument.

---
 lib/sys.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/lib/sys.js b/lib/sys.js
index ac8b023c4b..867b5a9e01 100644
--- a/lib/sys.js
+++ b/lib/sys.js
@@ -284,14 +284,25 @@ exports.exec = function () {
 
 
 exports.pump = function (readStream, writeStream, callback) {
+  if (!readStream.pause) readStream.pause = function () {readStream.emit("pause")};
+  if (!readStream.resume) readStream.resume = function () {readStream.emit("resume")};
+
   readStream.addListener("data", function (chunk) {
     if (writeStream.write(chunk) === false) readStream.pause();
   });
 
+  writeStream.addListener("pause", function () {
+    readStream.pause();
+  });
+
   writeStream.addListener("drain", function () {
     readStream.resume();
   });
 
+  writeStream.addListener("resume", function () {
+    readStream.resume();
+  });
+
   readStream.addListener("end", function () {
     writeStream.end();
   });