Android 6.0 關於Selinux如何打開和關閉

直接上方法：

1.臨時的：設備必須是已經取得root權限（adb shell 顯示#）

adb shell setenforce 0(立刻見效)

2.永久的：在\alps\system\core\init\init.cpp修改

selinux_initialize方法中修改如下

is_enforcing = 0;//add mtk 重新賦值，selinux權限就會關閉了

static void selinux_initialize(bool in_kernel_domain) {
    Timer t;

    selinux_callback cb;
    cb.func_log = selinux_klog_callback;
    selinux_set_callback(SELINUX_CB_LOG, cb);
    cb.func_audit = audit_callback;
    selinux_set_callback(SELINUX_CB_AUDIT, cb);

    if (selinux_is_disabled()) {
        return;
    }

    if (in_kernel_domain) {
        INFO("Loading SELinux policy...\n");
        if (selinux_android_load_policy() < 0) {
            ERROR("failed to load policy: %s\n", strerror(errno));
            security_failure();
        }

        bool is_enforcing = selinux_is_enforcing();
		is_enforcing = 0;//add mtk 重新賦值，selinux權限就會關閉了
        security_setenforce(is_enforcing);

        if (write_file("/sys/fs/selinux/checkreqprot", "0") == -1) {
            security_failure();
        }

        NOTICE("(Initializing SELinux %s took %.2fs.)\n",
               is_enforcing ? "enforcing" : "non-enforcing", t.duration());
    } else {
        selinux_init_all_handles();
    }
}