C++ Run Batch File Without Redirecting Output

Question

tempString = (string("cmd.exe /C \"") + tempString + "\"");

STARTUPINFO si = { sizeof(STARTUPINFO) };

PROCESS_INFORMATION pi;

CreateProcess(NULL, (LPSTR)tempString.c_str(), 0, 0, FALSE, CREATE_UNICODE_ENVIRONMENT, NULL, 0, &si, &pi);

I am starting a batch script from within another process through a dll. The issue is that the process is displaying:

error : Input redirection is not supported, exiting the process immediately.

How can I start a batch script so that it is independent of the calling process (will not close when callee closes) and does not output in the console of the calling process?

See [this answer](http://stackoverflow.com/a/25677154/3959875) — wOxxOm, Jul 22 '15 at 10:39
@wOxxOm DETATCH_PROCESS didn't work, but I read the other available flags and CREATE_NEW_CONSOLE does work in my situation, thanks. — John, Jul 22 '15 at 11:11
it'd be nice if you add your findings as an answer and accept it. — wOxxOm, Jul 22 '15 at 11:27

JerryYoung · Answer 1 · 2015-07-22T11:27:27.967

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If you don't want show the console window when executing command string, you can do as below:

tempString = (string(" /C \"") + tempString + "\"");
ShellExecute(NULL, NULL, "cmd.exe", tempString.c_str(), NULL, SW_HIDE);

edited Jul 22 '15 at 11:27

answered Jul 22 '15 at 10:41

JerryYoung

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`WinExec` was deprecated long time ago and should not be used. It exists only for the compatibility with 16bit applications. – Ari0nhh Jul 22 '15 at 10:45
Thanks for reply, I forget the WinExec API is deprecated, I modified my answer. – JerryYoung Jul 22 '15 at 11:29
My question wasn't to hide the window, it was to prevent the redirection of output. – John Jul 22 '15 at 13:00

score 0 · Answer 2 · answered Jul 22 '15 at 13:01

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The CREATE_NEW_CONSOLE flag allocates a new console for the process to use so that it does not use the same stdout as the calling process.

answered Jul 22 '15 at 13:01

John

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C++ Run Batch File Without Redirecting Output

2 Answers2