fea: support route func for network (#53)

pkg/libol/utils.go

@@ -347,3 +347,12 @@ func Exec(bin string, args ...string) (string, error) {
 	out, err := exec.Command(bin, args...).CombinedOutput()
 	return string(out), err
 }
+
+func IsProcessRunning(pid int) bool {
+	process, err := os.FindProcess(pid)
+	if err != nil {
+		return false
+	}
+	err = process.Signal(syscall.Signal(0))
+	return err == nil
+}