使用匿名管道做进程通信,需要用父进程创建一个子进程,该子进程的标准输入输出句柄由父进程指定。
无论父进程还是子进程,都可以收发数据,这里仅演示父进程发数据,子进程打印数据。
父进程循环从控制台读数据,并发送给子进程,子进程用对话框打印数据,约定子进程收到"quit"后退出。
父进程(发送端)
#define _CRT_SECURE_NO_WARNINGS
#include <Windows.h>
#include <stdio.h>
HANDLE g_hRead, g_hWrite;
BOOL CreateChildProcess()
{
// 创建可继承的匿名管道,可以理解成输入输出设备
SECURITY_ATTRIBUTES sa;
sa.bInheritHandle = TRUE;
sa.lpSecurityDescriptor = NULL;
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
if (!CreatePipe(&g_hRead, &g_hWrite, &sa, 0))
{
printf("创建匿名管道失败\n");
return FALSE;
}
// 创建子进程,设置标准输入输出设备
STARTUPINFO si;
PROCESS_INFORMATION pi;
ZeroMemory(&si, sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
si.dwFlags = STARTF_USESTDHANDLES;
si.hStdInput = g_hRead;
si.hStdOutput = g_hWrite;
si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
if (FALSE == CreateProcess(TEXT("C:\\Users\\gsy\\source\\repos\\2020年暑假学习\\Debug\\匿名管道-接收端.exe"),
NULL, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi))
{
//printf("创建进程失败\n");
CloseHandle(g_hRead);
CloseHandle(g_hWrite);
g_hRead = g_hWrite = NULL;
return FALSE;
}
else
{
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
}
return TRUE;
}
void SendData()
{
char szBuffer[0x100];
scanf("%s", szBuffer);
DWORD dwWrite = 0;
if (!WriteFile(g_hWrite, szBuffer, strlen(szBuffer) + 1, &dwWrite, NULL))
{
printf("写数据失败\n");
}
}
int main()
{
if (CreateChildProcess())
{
printf("创建子进程成功,输入要发送的数据,输入quit杀死子进程\n");
}
else
{
printf("创建子进程失败\n");
}
while (true)
{
SendData();
}
return 0;
}
子进程(接收端)
#include <windows.h>
#include <stdio.h>
int main()
{
HANDLE hRead = GetStdHandle(STD_INPUT_HANDLE);
HANDLE hWrite = GetStdHandle(STD_OUTPUT_HANDLE);
char szBuffer[0x100];
DWORD dwRead = 0;
while (true)
{
ReadFile(hRead, szBuffer, 0x100, &dwRead, NULL);
if (strcmp(szBuffer, "quit") == 0)
{
printf("quit!\n");
break;
}
printf("%s\n", szBuffer);
MessageBoxA(0, szBuffer, "子进程接收到的数据", MB_OK);
}
return 0;
}
运行结果(运行父进程程序)
---------------------
作者:hambaga
来源:CSDN
原文:https://blog.csdn.net/Kwansy/article/details/108080435
版权声明:本文为作者原创文章,转载请附上博文链接!
内容解析By:CSDN,CNBLOG博客文章一键转载插件