ignited: catch signals and cleanup socket file

cmd/ignited/ignited.go

@@ -2,19 +2,46 @@ package main
 
 import (
 	"os"
+	"os/signal"
+	"path"
+	"syscall"
 
+	log "github.com/sirupsen/logrus"
 	"github.com/weaveworks/ignite/cmd/ignited/cmd"
+	"github.com/weaveworks/ignite/pkg/constants"
 	"github.com/weaveworks/ignite/pkg/providers"
 	"github.com/weaveworks/ignite/pkg/providers/ignited"
 	"github.com/weaveworks/ignite/pkg/util"
 )
 
 func main() {
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		s := <-sigChan
+		log.Debugf("Signal %q caught", s)
+		cleanup()
+
+		log.Debug("Program terminated normally")
+		os.Exit(0)
+	}()
+
 	if err := Run(); err != nil {
+		log.Debugf("Termination with error: %v", err)
 		os.Exit(1)
 	}
 }
 
+func cleanup() {
+
+	var daemonSocket = path.Join(constants.DATA_DIR, constants.DAEMON_SOCKET)
+
+	err := os.Remove(daemonSocket)
+	if err == nil {
+		log.Debugf("Socket %q removed successfully", daemonSocket)
+	}
+}
+
 // Run runs the main cobra command of this application
 func Run() error {
 	// Ignite needs to run as root for now, see