fix: agent deamon build

agent/main.go

@@ -9,6 +9,7 @@ import (
 	"os/exec"
 	"os/signal"
 	"path/filepath"
+	"reflect"
 	"syscall"
 	"time"
 
@@ -312,10 +313,12 @@ func startDaemon() {
 		Stderr: devNull,
 	}
 
-	// 设置进程组，使子进程独立运行
-	cmd.SysProcAttr = &syscall.SysProcAttr{
-		Setsid: true,
+	// 设置进程组，使子进程独立运行 (跨平台兼容写法)
+	attr := &syscall.SysProcAttr{}
+	if field := reflect.ValueOf(attr).Elem().FieldByName("Setsid"); field.IsValid() {
+		field.SetBool(true)
 	}
+	cmd.SysProcAttr = attr
 
 	if err := cmd.Start(); err != nil {
 		fmt.Printf("启动失败: %v\n", err)

agent/service.go

@@ -8,11 +8,13 @@ import (
 	"runtime"
 	"strconv"
 	"syscall"
+
+	"github.com/gofrs/flock"
 )
 
 // ========== PID 文件管理 ==========
 
-var pidFileLock *os.File
+var fileLock *flock.Flock
 
 func getPidFile() string {
 	return filepath.Join(dataDir, "agent.pid")
@@ -25,31 +27,21 @@ func getLockFile() string {
 // tryLock 尝试获取文件锁，确保只有一个实例运行
 func tryLock() bool {
 	os.MkdirAll(dataDir, 0755)
-	lockFile := getLockFile()
-
-	var err error
-	pidFileLock, err = os.OpenFile(lockFile, os.O_CREATE|os.O_RDWR, 0644)
-	if err != nil {
+	
+	fileLock = flock.New(getLockFile())
+	locked, err := fileLock.TryLock()
+	if err != nil || !locked {
+		fileLock = nil
 		return false
 	}
-
-	// 尝试获取排他锁（非阻塞）
-	err = syscall.Flock(int(pidFileLock.Fd()), syscall.LOCK_EX|syscall.LOCK_NB)
-	if err != nil {
-		pidFileLock.Close()
-		pidFileLock = nil
-		return false
-	}
-
 	return true
 }
 
 // unlock 释放文件锁
 func unlock() {
-	if pidFileLock != nil {
-		syscall.Flock(int(pidFileLock.Fd()), syscall.LOCK_UN)
-		pidFileLock.Close()
-		pidFileLock = nil
+	if fileLock != nil {
+		fileLock.Unlock()
+		fileLock = nil
 		os.Remove(getLockFile())
 	}
 }