android11 native binder writeFileDescriptor和readFileDescriptor的使用

最新推荐文章于 2025-11-16 15:12:09 发布

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最新推荐文章于 2025-11-16 15:12:09 发布 · 583 阅读

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#binder

本文通过一个具体的Binder通信案例，展示了服务端与客户端之间的交互过程。案例中详细解释了如何使用Binder进行文件描述符传递，并在服务端实现文件写入操作。

服务端

#include <utils/Trace.h>
#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <semaphore.h>
#include <iostream>
#include <stdint.h>
#include <sys/types.h>
#include <set>
#include <thread>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <inttypes.h>

#include <cutils/properties.h>
#include <utils/Log.h>
#include <utils/SystemClock.h>
#include <android-base/properties.h>
#include <errno.h>
#include <fcntl.h>
#include <fstream>
#include <poll.h>
#include <pthread.h>

#include <binder/IPCThreadState.h>
#include <binder/ProcessState.h>
#include <binder/Binder.h>
#include <binder/IBinder.h>
#include <binder/IPCThreadState.h>
#include <binder/IServiceManager.h>
#include <binder/IServiceManager.h>
#include <sys/wait.h>

#include <private/binder/binder_module.h>
#include <sys/epoll.h>
#include <sys/prctl.h>

using namespace android;
using namespace std;

enum BinderLibTestTranscationCode {
   
   
	BINDER_LIB_TEST_NOP_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
	BINDER_LIB_TEST_REGISTER_SERVER,
	BINDER_LIB_TEST_ADD_SERVER,
    BINDER_LIB_TEST_ADD_POLL_SERVER,
    BINDER_LIB_TEST_CALL_BACK,
    BINDER_LIB_TEST_CALL_BACK_VERIFY_BUF,
    BINDER_LIB_TEST_DELAYED_CALL_BACK,
    BINDER_LIB_TEST_NOP_CALL_BACK,
    BINDER_LIB_TEST_GET_SELF_TRANSACTION,
    BINDER_LIB_TEST_GET_ID_TRANSACTION,
    BINDER_LIB_TEST_INDIRECT_TRANSACTION,
    BINDER_LIB_TEST_SET_ERROR_TRANSACTION,
    BINDER_LIB_TEST_GET_STATUS_TRANSACTION,
    BINDER_LIB_TEST_ADD_STRONG_REF_TRANSACTION,
    BINDER_LIB_TEST_LINK_DEATH_TRANSACTION,
    BINDER_LIB_TEST_WRITE_FILE_TRANSACTION,
    BINDER_LIB_TEST_WRITE_PARCEL_FILE_DESCRIPTOR_TRANSACTION,
    BINDER_LIB_TEST_EXIT_TRANSACTION,
    BINDER_LIB_TEST_DELAYED_EXIT_TRANSACTION,
    BINDER_LIB_TEST_GET_PTR_SIZE_TRANSACTION,