weedfuse: daemonize

weed/command/weedfuse/weedfuse.go

@@ -7,10 +7,14 @@ import (
 	"strings"
 
 	"github.com/chrislusf/seaweedfs/weed/command"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/kardianos/osext"
+	"github.com/jacobsa/daemonize"
 )
 
 var (
-	options = flag.String("o", "", "comma separated options rw,uid=xxx,gid=xxx")
+	options      = flag.String("o", "", "comma separated options rw,uid=xxx,gid=xxx")
+	isForeground = flag.Bool("foreground", false, "starts as a daemon")
 )
 
 func main() {
@@ -25,6 +29,11 @@ func main() {
 
 	maybeSetupPath()
 
+	if !*isForeground {
+		startAsDaemon()
+		return
+	}
+
 	parts := strings.SplitN(device, "/", 2)
 	filer, filerPath := parts[0], parts[1]
 
@@ -47,3 +56,29 @@ func maybeSetupPath() {
 		os.Setenv("PATH", "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin")
 	}
 }
+
+func startAsDaemon() {
+
+	// adapted from gcsfuse
+
+	// Find the executable.
+	var path string
+	path, err := osext.Executable()
+	if err != nil {
+		glog.Fatalf("osext.Executable: %v", err)
+	}
+
+	// Set up arguments. Be sure to use foreground mode.
+	args := append([]string{"-foreground"}, os.Args[1:]...)
+
+	// Pass along PATH so that the daemon can find fusermount on Linux.
+	env := []string{
+		fmt.Sprintf("PATH=%s", os.Getenv("PATH")),
+	}
+
+	err = daemonize.Run(path, args, env, os.Stdout)
+	if err != nil {
+		glog.Fatalf("daemonize.Run: %v", err)
+	}
+
+}