#鸿蒙通关秘籍#如何在C/C++中实现对文件的持久化权限管理？

在C/C++中可以使用提供的Native接口来实现对文件的持久化权限管理，如持久化授权、撤销授权等。首先需要链接库libohfileshare.so，然后可以按照以下步骤实现：

bash #include <filemanagement/fileshare/oh_file_share.h> #include <iostream>

void persistAndActivatePermissions() { static const uint32_t POLICY_NUM = 2; char strTestPath1[] = "file://com.example.fileshare/data/storage/el2/base/files/test1.txt"; char strTestPath2[] = "file://com.example.fileshare/data/storage/el2/base/files/test2.txt"; FileShare_PolicyInfo policy[POLICY_NUM] = { {strTestPath1, static_cast<unsigned int>(strlen(strTestPath1)), FileShare_OperationMode::READ_MODE}, {strTestPath2, static_cast<unsigned int>(strlen(strTestPath2)), FileShare_OperationMode::WRITE_MODE}}; FileShare_PolicyErrorResult* result = nullptr; uint32_t resultNum = 0;

auto ret = OH_FileShare_PersistPermission(policy, POLICY_NUM, &result, &resultNum);
if (ret != ERR_OK) {
    if (ret == ERR_EPERM && result != nullptr) {
        for(uint32_t i = 0; i < resultNum; i++) {
            std::cout << "错误URI: " <<  result[i].uri << std::endl;
            std::cout << "错误代码: " <<  result[i].code << std::endl;
            std::cout << "错误信息: " << result[i].message << std::endl;
        }
    }
}
OH_FileShare_ReleasePolicyErrorResult(result, resultNum);

}