解决linux下升级结果返回不正确的问题

app/upgrade/mainwindow.cpp

@@ -75,7 +75,8 @@ bool MainWindow::Upgrade(const std::string& pkgPath)
 
 #else
     std::string cmd = "pkexec dpkg -i \"" + pkgPath + "\"";
-    if (0 == system(cmd.c_str()))
+    int status = system(cmd.c_str());
+    if (-1 != status && WIFEXITED(status) && 0 == WEXITSTATUS(status))
         ret = true;
 #endif