C++系统相关操作8 - 获取程序的工作路径&获取用户的Home目录
1. 关键词
关键词:
C++ 系统调用 工作路径 Home目录 跨平台
应用场景:
- 获取C++编译的二进制程序当前的工作目录,如:用于存储或读取缓存文件。
- 获取用户的Home目录,如:用于保存或加载用户配置。
2. sysutil.h
#pragma once
#include <cstdint>
#include <string>
namespace cutl
{
/**
* @brief Get the working directory of the current excuting process.
*
* @return file path of the working directory
*/
std::string getcwd();
/**
* @brief Get the home dir for the current user.
*
* @return std::string the home directory.
*/
std::string homedir();
} // namespace cutl
3. sysutil.cpp
#include <map>
#include <iostream>
#include <strutil.h>
#include <cstdlib>
#include "sysutil.h"
#include "inner/logger.h"
#if defined(_WIN32) || defined(__WIN32__)
#include<direct.h>
#else
#include <unistd.h>
#endif
namespace cutl
{
std::string getcwd()
{
static constexpr int MAX_PATH_LEN = 1024;
#if defined(_WIN32) || defined(__WIN32__)
char buffer[MAX_PATH_LEN] = {0};
char *presult = _getcwd(buffer, MAX_PATH_LEN);
if (nullptr == presult)
{
CUTL_ERROR("_getcwd failure, presult is nullptr");
return "";
}
return std::string(presult);
#else
char buffer[MAX_PATH_LEN] = {0};
char *presult = getcwd(buffer, MAX_PATH_LEN);
if (nullptr == presult)
{
CUTL_ERROR("getcwd failure, presult is nullptr");
return "";
}
return std::string(presult);
#endif
}
std::string homedir()
{
#if defined(_WIN32) || defined(__WIN32__)
return cutl::getenv("USERPROFILE", "");
#else
return cutl::getenv("HOME", "");
#endif
}
} // namespace cutl
4. 测试代码
#include "common.hpp"
#include "sysutil.h"
void TestGetcwdAndHomedir()
{
PrintSubTitle("TestGetcwdAndHomedir");
std::cout << "working directory: " << cutl::getcwd() << std::endl;
std::cout << "Home directory: " << cutl::homedir() << std::endl;
}
5. 运行结果
----------------------------------------TestGetcwdAndHomedir----------------------------------------
working directory: /Users/spencer/workspace/common_util
Home directory: /Users/spencer
6. 源码地址
更多详细代码,请查看本人写的C++ 通用工具库: common_util, 本项目已开源,代码简洁,且有详细的文档和Demo。