From 9b747c3a9d45aca42a6063a70870796f39c8c0c7 Mon Sep 17 00:00:00 2001
From: Victor Marmol <vmarmol@google.com>
Date: Fri, 3 Oct 2014 08:36:08 -0700
Subject: [PATCH] Add a signal handler to pause.

It returns 0 when a signal is received.
---
 build/pause/pause.go   | 13 ++++++++++---
 build/pause/prepare.sh |  5 +++++
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/build/pause/pause.go b/build/pause/pause.go
index 56d92186029..4dd8c1d89d3 100644
--- a/build/pause/pause.go
+++ b/build/pause/pause.go
@@ -18,9 +18,16 @@ limitations under the License.
 
 package main
 
-import "syscall"
+import (
+	"os"
+	"os/signal"
+	"syscall"
+)
 
 func main() {
-	// Halts execution, waiting on signal.
-	syscall.Pause()
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt, os.Kill, syscall.SIGTERM)
+
+	// Block until a signal is received.
+	<-c
 }
diff --git a/build/pause/prepare.sh b/build/pause/prepare.sh
index 64e85fdc2ae..1690e889b3f 100755
--- a/build/pause/prepare.sh
+++ b/build/pause/prepare.sh
@@ -3,4 +3,9 @@
 set -e
 set -x
 
+# Build the binary.
 go build --ldflags '-extldflags "-static" -s' pause.go
+
+# Run goupx to shrink binary size.
+go get github.com/pwaller/goupx
+goupx pause