add signal handling boilerblate

lib/util/signals/unix.go

@@ -0,0 +1,30 @@
+// +build !windows
+
+package signals
+
+import (
+	"os/signal"
+	"syscall"
+)
+
+func init() {
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
+}
+
+func Handle() {
+	for {
+		sig, ok := <-sigChan
+		if !ok {
+			// closed channel
+			return
+		}
+		if sig == syscall.SIGHUP {
+			handleReload()
+		} else if sig == syscall.SIGINT || sig == syscall.SIGTERM {
+			handleInterrupted()
+		} else {
+			// wtf?
+		}
+	}
+
+}