做网站的收益,象山专业网站建设,网站建设与维护报告总结,小米商城网页设计论文1. 关键词2. sysutil.h3. sysutil.cpp 3.1. system_util_unix.cpp3.2. system_util_win.cpp 4. 测试代码5. 运行结果6. 源码地址
1. 关键词
关键词#xff1a;
C 系统调用 system popen 跨平台
应用场景#xff1a;
希望直接调用操作系统的某些命令#xff0c;并获取命…1. 关键词2. sysutil.h3. sysutil.cpp 3.1. system_util_unix.cpp3.2. system_util_win.cpp 4. 测试代码5. 运行结果6. 源码地址
1. 关键词
关键词
C 系统调用 system popen 跨平台
应用场景
希望直接调用操作系统的某些命令并获取命令的返回值。
2. sysutil.h
#pragma once#include cstdint
#include stringnamespace cutl
{/*** brief Execute a system command.** param cmd the command to be executed.* return true if the command is executed successfully, false otherwise.*/bool system(const std::string cmd);/*** brief Execute a system command and get the output.** param cmd the command to be executed.* param result the output of the command.* return true if the command is executed successfully, false otherwise.*/bool callcmd(const std::string cmd, std::string result);
} // namespace cutl
不需要返回值时可以直接使用system 需要获取返回值时可以调用callcmd。
3. sysutil.cpp #include map
#include iostream
#include strutil.h
#include cstdlib
#include sysutil.h
#include inner/logger.h
#include inner/system_util.h
#include inner/filesystem.hnamespace cutl
{bool system(const std::string cmd){return call_system(cmd);}bool callcmd(const std::string cmd, std::string result){// 读取命令执行结果的最大Buffer长度constexpr int MAX_CMD_BUF_LEN 1024;FILE *fp pipline_open(cmd);if (fp NULL){CUTL_ERROR(pipline_open error for cmd: cmd);return false;}// 读取命令执行结果char buffer[MAX_CMD_BUF_LEN] {0};char *res fgets(buffer, sizeof(buffer), fp);if (res NULL){CUTL_ERROR(read result error for cmd: cmd);if (pipline_close(fp) ! 0){CUTL_ERROR(pipline_close error for cmd: cmd);}return false;}if (pipline_close(fp) ! 0){CUTL_ERROR(pipline_close error for cmd: cmd);}result strip(std::string(buffer));return true;}
} // namespace cutl
3.1. system_util_unix.cpp
#if defined(_WIN32) || defined(__WIN32__)
// do nothing
#else#include system_util.h
#include inner/logger.hnamespace cutl
{bool call_system(const std::string cmd){if (cmd.empty()){CUTL_ERROR(cmd is empty!);return false;}pid_t status;status std::system(cmd.c_str());if (-1 status){CUTL_ERROR(system error!);return false;}if (!WIFEXITED(status)){CUTL_ERROR(exit status: std::to_string(WEXITSTATUS(status)));return false;}if (0 ! WEXITSTATUS(status)){CUTL_ERROR(run shell script fail, script exit code: std::to_string(WEXITSTATUS(status)));return false;}return true;}FILE *pipline_open(const std::string cmd){return popen(cmd.c_str(), r);}int pipline_close(FILE *stream){return pclose(stream);}} // namespace cutl#endif // defined(_WIN32) || defined(__WIN32__)
3.2. system_util_win.cpp
#if defined(_WIN32) || defined(__WIN32__)#include cstdlib
#include system_util.h
#include inner/logger.hnamespace cutl
{// https://learn.microsoft.com/zh-cn/cpp/c-runtime-library/reference/system-wsystem?viewmsvc-170bool call_system(const std::string cmd){if (cmd.empty()){CUTL_ERROR(cmd is empty!);return false;}int ret system(cmd.c_str());if (ret ! 0){CUTL_ERROR(std::string(system failure, error) strerror(errno));return false;}return true;}// https://learn.microsoft.com/zh-cn/cpp/c-runtime-library/reference/popen-wpopen?viewmsvc-170FILE *pipline_open(const std::string cmd){return _popen(cmd.c_str(), r);}// https://learn.microsoft.com/zh-cn/cpp/c-runtime-library/reference/pclose?viewmsvc-170int pipline_close(FILE *stream){return _pclose(stream);}} // namespace cutl#endif // defined(_WIN32) || defined(__WIN32__)
4. 测试代码
#include common.hpp
#include sysutil.hvoid TestSystemCall()
{PrintSubTitle(TestSystemCall);bool ret cutl::system(echo hello);std::cout system call echo hello, return: ret std::endl;auto cmd cmake --version;std::string result_text;ret cutl::callcmd(cmd, result_text);std::cout callcmd cmd , return: ret std::endl;std::cout callcmd cmd , result text: result_text std::endl;
}
5. 运行结果
-------------------------------------------TestSystemCall-------------------------------------------
hello
system call echo hello, return: 1
callcmd cmake --version, return: 1
callcmd cmake --version, result text: cmake version 3.28.3
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。 本文由博客一文多发平台 OpenWrite 发布
