android L adb获取root原理

来源：互联网发布：MAC maven安装配置编辑：程序博客网时间：2024/06/08 15:27

下面的方法就是判断要不要打开root，先上代码

static int should_drop_privileges() {#ifndef ALLOW_ADBD_ROOT    return 1;                     //如果没定义AllOW_ADVD_ROOT,则return1，不能root#else /* ALLOW_ADBD_ROOT */        int secure = 0;    char value[PROPERTY_VALUE_MAX];   /* run adbd in secure mode if ro.secure is set and    ** we are not in the emulator    */    property_get("ro.kernel.qemu", value, "");          //这个属性不知道是什么，一般不存在    if (strcmp(value, "1") != 0) {        property_get("ro.secure", value, "1");            //如果ro.secure是1，不打开root，但如果ro.debuggable是1，且service.adb.root是1，则可以打开root        if (strcmp(value, "1") == 0) {            // don't run as root if ro.secure is set...            secure = 1;            // ... except we allow running as root in userdebug builds if the            // service.adb.root property has been set by the "adb root" command            property_get("ro.debuggable", value, "");            if (strcmp(value, "1") == 0) {                property_get("service.adb.root", value, "");                if (strcmp(value, "1") == 0) {                    secure = 0;                }            }        }    }    return secure;#endif /* ALLOW_ADBD_ROOT */}

所以根据上面的代码，可以设置属性ro.secure为0，则打开了root！！！！

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