示例程序：
/*
Name: 3745739.c
Copyright: iDLER FANG
Author: iDLER FANG
Date: 22-01-05 22:56
Description: Sample of child process I/O redirect.
*/
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#define BUFFSIZE 4096
int main(int argc, char *argv[])
{
const char* lpszCmd = "test.exe";
/* 以下为创建匿名管道所需的参数 */
HANDLE hReadPipe, /* 读管道 */
hWritePipe; /* 写管道 */
SECURITY_ATTRIBUTES sec_attr; /* 安全属性 */
/* 以下为创建子进程需要的参数 */
STARTUPINFO start_info;
PROCESS_INFORMATION proc_info;
char buff[BUFFSIZE]; /* 缓冲区 */
DWORD bytesRead;
const int interval = 100; /* 更新间隔 */
/* 创建匿名管道 */
sec_attr.bInheritHandle = TRUE; /* 保证管道能够被子进程继承 */
sec_attr.nLength = sizeof(SECURITY_ATTRIBUTES);
sec_attr.lpSecurityDescriptor = NULL; /* 使用系统默认的安全描述符 */
if (CreatePipe(&hReadPipe, &hWritePipe, &sec_attr, 0) == 0) {
fprintf(stderr, "Anonymous pipe creation failed!\n");
return -1;
}
/* 创建子进程 */
start_info.cb = sizeof(STARTUPINFO);
GetStartupInfo(&start_info);
start_info.hStdOutput = hWritePipe; /* 重定向stdout */
start_info.hStdError = hWritePipe; /* 重定向stderr */
start_info.wShowWindow = SW_HIDE; /* 当然，不显示窗口 */
start_info.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; /* 使以上参数生效 */
if (CreateProcess(NULL, TEXT(lpszCmd), NULL, NULL, TRUE, NULL, NULL, NULL, &start_info, &proc_info) == 0) {
fprintf(stderr, "Child process creation failed!\n");
return -1;
}
CloseHandle(hWritePipe); /* 当前进程并不需要这个写入端 */
/* 从hReadPipe读入 */
for(;;) {
if (ReadFile(hReadPipe, buff, BUFFSIZE - 1, &bytesRead, NULL) == NULL) break;
printf("%s", buff);
Sleep(interval);
}
system("PAUSE");
return 0;
}
test.c
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
int main(int argc, char *argv[])
{
const int times = 10;
const int interval = 1000;
int i;
for (i = 0; i < times; i++) {
fprintf(stdout, "i = %d\n", i);
fflush(stdout);
Sleep(interval);
}
return 0;
}