CreateProcess：在C ++ / Windows中将child stdout重定向到父stdout

本文介绍了CreateProcess：在C ++ / Windows中将child stdout重定向到父stdout的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

根据MSDN，这将儿童stdout重定向到父级stdout，但它不会，什么是错误的。

According to MSDN this redirects child stdout to parent stdout, but it does not, what is wrong?

PROCESS_INFORMATION pi; STARTUPINFOA si; ZeroMemory( &si, sizeof(si) ); si.cb = sizeof(si); ZeroMemory( &pi, sizeof(pi) ); si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE); si.hStdError = GetStdHandle(STD_ERROR_HANDLE); si.dwFlags |= STARTF_USESTDHANDLES; BOOL ret = CreateProcessA( 0, cmd_line, 0, 0, TRUE, CREATE_NO_WINDOW, 0, 0, & si, & pi);

不起作用：

using DuplicateHandle does not help:

HANDLE out, err;//global variables ... PROCESS_INFORMATION pi; STARTUPINFOA si; ZeroMemory( &si, sizeof(si) ); si.cb = sizeof(si); ZeroMemory( &pi, sizeof(pi) ); BOOL ret = DuplicateHandle( GetCurrentProcess(), GetStdHandle(STD_OUTPUT_HANDLE), GetCurrentProcess(), &out, 0, TRUE, DUPLICATE_SAME_ACCESS);//todo check ret ret = DuplicateHandle( GetCurrentProcess(), GetStdHandle(STD_ERROR_HANDLE), GetCurrentProcess(), &err, 0, TRUE, DUPLICATE_SAME_ACCESS);//todo check ret si.hStdOutput = out; si.hStdError = err; si.dwFlags |= STARTF_USESTDHANDLES; ret = CreateProcessA( 0, cmd_line, 0, 0, TRUE, CREATE_NO_WINDOW, 0, 0, & si, & pi);

推荐答案

BOOL ret = CreateProcessA 0，cmd_line，0，0，TRUE，CREATE_NO_WINDOW，0,0，& si，& pi）;

CREATE_NO_WINDOW 会导致此行为，请将其删除：

CREATE_NO_WINDOW causes this behavior, remove it:

BOOL ret = CreateProcessA（0，cmd_line，0，0，TRUE， 0，0，& si，& pi）;