Question

I have an application which consists of the native part and higher layer.

Therefore, it needs to be granted the root privilege to run some native functions.

As the article I post before, I added a piece of code taken from Bluez Utils(hidd.c).

if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
    close(sk);
    return -1;
   }

该法典是由国家科索沃统计局制定的。

Unfortunately, It keeps returning -1 and errno is 13 which means Permission Denied.

Some experienced developers(Thank you here) mentioned about that the error happens because this application doesnt have enough permission.

“SHOULD NOT”就是这样的东西。

工艺过程 = 运行时间。

I think this means you possess a system permission but your application doesnt. (Let me know if I am wrong)

是否有办法给予谁以根本特权?

Any reply/clue/hint will be highly appreciated.

关于

Sam

Answer 1

我认为,我可以帮助你这样做。

这里,我们 go......

void gainRoot()
{
    Process chperm;
    try {
        chperm=Runtime.getRuntime().exec("su");
          DataOutputStream os = 
              new DataOutputStream(chperm.getOutputStream());
            os.writeBytes("chmod 777 /dev/video0
");
            os.flush();

            os.writeBytes("exit
");
            os.flush();

            chperm.waitFor();

    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

这是一项职能,通常用于改变对基本档案的许可。

当你起诉时,将产生一个具有根本特权的新进程。因此,利用这一进程,你可以开展任何根本行动。有一些具体的分类需要遵循。以上的例子就说明了这一点。

你可以做的一件事情是,将《刑法》的约束部分作为单独的可执行部分,并将其置于系统/宾内,或放在通常可起诉的地点。保留可执行的名称是123,而不是123

            os.writeBytes("chmod 777 /dev/video0
");
            os.flush();

改为

            os.writeBytes("bind123
");
            os.flush();

上述法典。

这应当行之有效。或许一旦这项工作完成,我们便可尝试将其与申请结合起来,而不依赖可起诉者。我希望我不会混淆你。如果完全需要澄清,请让我知道......。

Answer 2

You don t need root to bind to port >=1024. You only need INTERNET permission in your ApplicationManifest.xml file.

友情链接