使用 boost 获取文件的所有者和组

#include <boost/filesystem.hpp>
#include <boost/system/system_complete.hpp>
#include <boost/system/error_code.hpp>

boost::filesystem::path path("example.txt");

boost::system::error_code error_code;
std::string owner_name = "unknown";
std::string group_name = "unknown";

if (boost::filesystem::exists(path)) {
    error_code = boost::filesystem::system_complete(path, owner_name, group_name);
}

if (error_code == 0) {
    std::cout << "File owner: " << owner_name << std::endl;
    std::cout << "File group: " << group_name << std::endl;
} else {
    std::cerr << "Error: " << error_code << " - " << boost::system::system_category().message(error_code) << std::endl;
}