From 56cf7be3345925fd39f0a3847172c2dda0e6ad9d Mon Sep 17 00:00:00 2001
From: Brandon Philips <brandon@ifup.co>
Date: Fri, 3 Jan 2014 18:07:43 -0800
Subject: [PATCH] Allow fd:// like unix:// and tcp://

Somthing like 20605eb310f0b57bd06eea80ec63c5022fc83bde

Docker-DCO-1.1-Signed-off-by: Brandon Philips <brandon.philips@coreos.com> (github: philips)
---
 systemd/listendfd.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/systemd/listendfd.go b/systemd/listendfd.go
index a8fdb09..08070b6 100644
--- a/systemd/listendfd.go
+++ b/systemd/listendfd.go
@@ -17,6 +17,11 @@ func ListenFD(addr string) ([]net.Listener, error) {
 		return nil, errors.New("No sockets found")
 	}
 
+	// default to all fds just like unix:// and tcp://
+	if addr == "" {
+		addr = "*"
+	}
+
 	fdNum, _ := strconv.Atoi(addr)
 	fdOffset := fdNum - 3
 	if (addr != "*") && (len(files) < int(fdOffset)+1) {