Add a signal handler to pause.

It returns 0 when a signal is received.

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
 }

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