C++ - 如何设置文件权限(跨平台)

#include<filesystem>
namespace fs = std::filesystem;

fs::path file_path = "path/to/your/file";
fs::perms permissions = fs::perms::owner_read | fs::perms::owner_write | fs::perms::group_read | fs::perms::others_read;
fs::permissions(file_path, permissions);

#include <sys/stat.h>

std::string file_path = "path/to/your/file";
mode_t permissions = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
chmod(file_path.c_str(), permissions);

#include <io.h>

std::string file_path = "path/to/your/file";
_chmod(file_path.c_str(), _S_IREAD | _S_IWRITE);