From a0134ff0f8a44e08823a0a8e219aff599fd5e011 Mon Sep 17 00:00:00 2001
From: Peter Griess <pg@std.in>
Date: Mon, 7 Jun 2010 10:08:57 -0700
Subject: [PATCH] add net.Server.listenFD

Now that FD passing is in master, it'd be great to be able to use a received
socket (which has already had bind(2) and listen(2) called on it) to fire up a
new net.Server instance. This patch adds a net.Server.listenFD() method which
will start up the accept watcher on the provided FD.
---
 lib/net.js | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/lib/net.js b/lib/net.js
index fd825dad7fb..685c64b326d 100644
--- a/lib/net.js
+++ b/lib/net.js
@@ -1167,11 +1167,24 @@ Server.prototype.listen = function () {
   }
 };
 
-Server.prototype._doListen = function () {
-  listen(this.fd, 128);
+Server.prototype.listenFD = function (fd) {
+  if (this.fd) {
+    throw new Error('Server already opened');
+  }
+
+  this.fd = fd;
+  this._startWatcher();
+};
+
+Server.prototype._startWatcher = function () {
   this.watcher.set(this.fd, true, false);
   this.watcher.start();
   this.emit("listening");
+};
+
+Server.prototype._doListen = function () {
+  listen(this.fd, 128);
+  this._startWatcher();
 }