diff --git a/src/main.go b/src/main.go
index a767ae1..36e176a 100644
--- a/src/main.go
+++ b/src/main.go
@@ -1,11 +1,15 @@
 package main
 
 import (
+    "fmt"
     log "github.com/sirupsen/logrus"
+    "syscall"
+    "time"
 )
 
 var xray *Process
 var sleep *Process
+var empty *Process
 
 var logLevel = "warning"
 
@@ -22,6 +26,21 @@ var addOnInbounds []interface{}
 
 var assetFile = "/etc/xproxy/assets.tar.xz"
 
+func exit() {
+    log.Warningf("Start exit process")
+    xray.disableProcess()
+    xray.sendSignal(syscall.SIGTERM)
+    //log.Infof("Send kill signal to process %s", xray.caption)
+    sleep.disableProcess()
+    sleep.sendSignal(syscall.SIGTERM)
+    empty.disableProcess()
+    empty.sendSignal(syscall.SIGTERM)
+    log.Info("Wait sub process exit")
+    for !(xray.done && sleep.done) {
+    }
+    log.Infof("Exit complete")
+}
+
 func main() {
     log.SetLevel(log.DebugLevel)
     log.Warning("XProxy start")
@@ -32,12 +51,18 @@ func main() {
     sleep = newProcess("sleep", "1000")
     sleep.startProcess(true, true)
 
-    done := make(chan bool, 1)
+    //done := make(chan bool, 1)
 
     daemon(xray)
     daemon(sleep)
-
-    <-done
+    daemon(empty)
+
+    fmt.Println("start sleep...")
+    time.Sleep(10 * time.Second)
+    fmt.Println("wake up")
+    exit()
+    
+    //<-done
 
     //content, err := os.ReadFile("test.yml")
     //if err != nil {
diff --git a/src/process.go b/src/process.go
index ad9c2dd..6c322ac 100644
--- a/src/process.go
+++ b/src/process.go
@@ -8,6 +8,7 @@ import (
 )
 
 type Process struct {
+    done    bool
     enable  bool
     caption string
     command []string
@@ -43,9 +44,11 @@ func (p *Process) isProcessAlive() bool {
 }
 
 func (p *Process) sendSignal(signal syscall.Signal) {
-    err := p.process.Process.Signal(signal)
-    if err != nil {
-        log.Errorf("Send signal %v to process %s error -> %v", signal, p.caption, err)
+    if p != nil {
+        err := p.process.Process.Signal(signal)
+        if err != nil {
+            log.Errorf("Send signal %v to process %s error -> %v", signal, p.caption, err)
+        }
     }
 }
 
@@ -56,6 +59,12 @@ func (p *Process) waitProcess() {
     }
 }
 
+func (p *Process) disableProcess() {
+    if p != nil {
+        p.enable = false
+    }
+}
+
 func daemonSub(sub *Process) {
     for sub.isProcessAlive() {
         sub.waitProcess()
@@ -69,7 +78,11 @@ func daemonSub(sub *Process) {
 }
 
 func daemon(sub *Process) {
-    go func() {
-        daemonSub(sub)
-    }()
+    if sub != nil && sub.enable {
+        log.Infof("Start daemon of process %s", sub.caption)
+        go func() {
+            daemonSub(sub)
+            sub.done = true
+        }()
+    }
 }