From 6aa1981e91c30e3ceefde8faabf4be9176ea61ab Mon Sep 17 00:00:00 2001
From: Solomon Hykes <solomon@dotcloud.com>
Date: Sat, 19 Jan 2013 17:41:59 -0800
Subject: [PATCH] CLI: don't crash with no arguments Upstream-commit:
 3dc240c7eedd8d47d91704cf378d76658856fe79 Component: engine

---
 components/engine/docker/docker.go | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/components/engine/docker/docker.go b/components/engine/docker/docker.go
index 1fbad569fc..869af75e0b 100644
--- a/components/engine/docker/docker.go
+++ b/components/engine/docker/docker.go
@@ -30,7 +30,15 @@ func CallToURL(host string, cmd string, args []string) *url.URL {
 
 func main() {
 	flag.Parse()
-	u := CallToURL(os.Getenv("DOCKER"), flag.Args()[0], flag.Args()[1:])
+	var cmd string
+	var args []string
+	if len(flag.Args()) >= 1 {
+		cmd = flag.Args()[0]
+	}
+	if len(flag.Args()) >= 2 {
+		args = flag.Args()[1:]
+	}
+	u := CallToURL(os.Getenv("DOCKER"), cmd, args)
 	resp, err := http.Get(u.String())
 	if err != nil {
 		log.Fatal(err)