执行命令并获取结果函数

 

Windows下：获取cmd命令返回结果

 

HRESULT CMDEx(LPCTSTR pszCMD, CString &str){ if(pszCMD == NULL || pszCMD[0] == 0) { return S_FALSE; } TCHAR szCMD[1024] = {0}; STARTUPINFO si; PROCESS_INFORMATION pi; HANDLE hRead, hWrite; SECURITY_ATTRIBUTES sa = {0, NULL, TRUE}; //创建匿名管道 if(!CreatePipe(&hRead, &hWrite, &sa, 0)) { return S_FALSE; } _stprintf(szCMD, TEXT("cmd.exe /C %.1000s"), pszCMD); str.Empty(); ZeroMemory(&si, sizeof(STARTUPINFO)); si.cb = sizeof(STARTUPINFO); si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; si.wShowWindow= SW_HIDE; si.hStdOutput= hWrite; si.hStdError= hWrite; si.hStdInput= hRead; //创建进程执行命令 if(CreateProcess(NULL, szCMD, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)) { //等待命令执行完成 WaitForSingleObject(pi.hProcess, INFINITE); CloseHandle(hWrite); DWORDdwRet, dwReaded; CHARszBuf[256] = {0}; //获取进程执行返回值 GetExitCodeProcess(pi.hProcess, &dwRet); //读取控制台终端输出 while(ReadFile(hRead, szBuf, 255, &dwReaded, NULL)) { szBuf[dwReaded] = 0; str += szBuf; } if(dwRet != 0) { str.Insert(0, TEXT("/r/n")); str.Insert(0, szCMD); } CloseHandle(hRead); return HRESULT_FROM_WIN32(dwRet); } else { CloseHandle(hWrite); CloseHandle(hRead); return(HRESULT_FROM_WIN32(GetLastError())); }} 

 

linux下：

#include <memory.h>#include <stdio.h>#include <unistd.h>#include <sys/types.h> //执行系统命令，并获取输出int mysystem(const char* cmdstring, char* buf, int len){ int fd[2];//文件描述符 pid_t pid;//管道 int n, count; memset(buf, 0, len); if (pipe(fd) < 0)//建立管道 return -1; if ((pid = fork()) < 0)//新建进程 return -1;//失败的话，返回-1 else if (pid > 0) /* 父进程 */ { close(fd[1]); /* 关闭写管道 */ count = 0; while ((n = read(fd[0], buf + count, len)) > 0 && count > len)//从管道中读取数据 count += n; close(fd[0]); if (waitpid(pid, NULL, 0) > 0) return -1; } else /* 子进程 */ { close(fd[0]); /* close read end */ if (fd[1] != STDOUT_FILENO) { if (dup2(fd[1], STDOUT_FILENO) != STDOUT_FILENO)//复制文件描述符 { return -1; } close(fd[1]); } if (execl("/bin/sh", "sh", "-c", cmdstring, (char*)0) == -1) { printf("%s failure/n",cmdstring); return -1; } else printf("%s success/n",cmdstring); } return 0;} 

int systemex(const char* cmdstring, string &info){    if (cmdstring == NULL || cmdstring[0] == 0)        return EINVAL;    FILE *fd = popen(cmdstring, "r");    if (fd != NULL)    {            char buf[1024];        while (fgets(buf, 1024, fd))         {                info += buf;         }            pclose(fd);    }        else     {            Log(strerror(errno), "popen");        return errno;;    }        return 0;}