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