Android11上，通过命令行访问adb的时候增加密码。

修改以后，直接访问adb会报错，需要使用来输入密码鉴权，默认密码为admin，即输入adb shell admin以后可以正常访问adb。

详细修改如下：

1、修改system/core/adb/adb.cpp

此处主要通过重置accept_shell的值，让adb断开以后需要重新输入密码进行访问 

diff --git a/system/core/adb/adb.cpp b/system/core/adb/adb.cpp index c3e9731a30..990dec445b 100644 --- a/system/core/adb/adb.cpp +++ b/system/core/adb/adb.cpp @@ -100,6 +100,11 @@ apacket* get_apacket(void)      return p;  }   + +#if !ADB_HOST +int accept_shell; +#endif +  void put_apacket(apacket *p)  {      delete p; @@ -110,6 +115,9 @@ void handle_online(atransport *t)      D("adb: online");      t->online = 1;      t->SetConnectionEstablished(true); +    #if !ADB_HOST +    accept_shell = 0; +    #endif  }    void handle_offline(atransport *t) @@ -126,6 +134,9 @@ void handle_offline(atransport *t)      // Close the associated usb      t->online = 0;   +    #if !ADB_HOST +    accept_shell = 0; +    #endif      // This is necessary to avoid a race condition that occurred when a transport closes      // while a client socket is still active.      close_all_sockets(t)

2、修改system/core/adb/services.cpp

访问密码通过读取property（persist.otg.passwd）的值获取， 默认为admin

diff --git a/system/core/adb/services.cpp b/system/core/adb/services.cpp index 853d658976..c1544f6ac6 100644 --- a/system/core/adb/services.cpp +++ b/system/core/adb/services.cpp @@ -27,6 +27,7 @@  #include   #include    +#include   #include   #include   #include  @@ -74,9 +75,41 @@ unique_fd create_service_thread(const char* service_name, std::function= 0) { +                close_on_exec(ret); +            } +        } +        return ret; +    } +#endif      if (is_socket_spec(name)) {          std::string error;          if (!socket_spec_connect(&ret, name, nullptr, nullptr, &error)) {